diff options
Diffstat (limited to 'source/blender/blenkernel/intern/dynamicpaint.c')
| -rw-r--r-- | source/blender/blenkernel/intern/dynamicpaint.c | 4874 |
1 files changed, 4874 insertions, 0 deletions
diff --git a/source/blender/blenkernel/intern/dynamicpaint.c b/source/blender/blenkernel/intern/dynamicpaint.c new file mode 100644 index 00000000000..3085876f592 --- /dev/null +++ b/source/blender/blenkernel/intern/dynamicpaint.c @@ -0,0 +1,4874 @@ +/** +***** BEGIN GPL LICENSE BLOCK ***** + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * Contributor(s): Miika Hämäläinen + * + * ***** END GPL LICENSE BLOCK ***** + */ + + +#include "MEM_guardedalloc.h" + +#include <math.h> +#include <stdio.h> + +#include "BLI_blenlib.h" +#include "BLI_math.h" +#include "BLI_kdtree.h" +#include "BLI_threads.h" +#include "BLI_utildefines.h" + +#include "DNA_anim_types.h" +#include "DNA_dynamicpaint_types.h" +#include "DNA_group_types.h" /*GroupObject*/ +#include "DNA_material_types.h" +#include "DNA_mesh_types.h" +#include "DNA_meshdata_types.h" +#include "DNA_modifier_types.h" +#include "DNA_object_types.h" +#include "DNA_scene_types.h" +#include "DNA_space_types.h" +#include "DNA_texture_types.h" + +#include "BKE_animsys.h" +#include "BKE_bvhutils.h" /* bvh tree */ +#include "BKE_blender.h" +#include "BKE_cdderivedmesh.h" +#include "BKE_context.h" +#include "BKE_customdata.h" +#include "BKE_colortools.h" +#include "BKE_deform.h" +#include "BKE_depsgraph.h" +#include "BKE_DerivedMesh.h" +#include "BKE_dynamicpaint.h" +#include "BKE_effect.h" +#include "BKE_global.h" +#include "BKE_image.h" +#include "BKE_main.h" +#include "BKE_material.h" +#include "BKE_modifier.h" +#include "BKE_object.h" +#include "BKE_particle.h" +#include "BKE_pointcache.h" +#include "BKE_scene.h" +#include "BKE_texture.h" + +#include "RNA_access.h" +#include "RNA_define.h" +#include "RNA_enum_types.h" + +/* for image output */ +#include "IMB_imbuf_types.h" +#include "IMB_imbuf.h" + +/* to read material/texture color */ +#include "RE_render_ext.h" +#include "RE_shader_ext.h" + +#ifdef _OPENMP +#include <omp.h> +#endif + +/* precalculated gaussian factors for 5x super sampling */ +static float gaussianFactors[5] = { 0.996849f, + 0.596145f, + 0.596145f, + 0.596145f, + 0.524141f}; +static float gaussianTotal = 3.309425f; + +/* UV Image neighbouring pixel table x and y list */ +static int neighX[8] = {1,1,0,-1,-1,-1, 0, 1}; +static int neighY[8] = {0,1,1, 1, 0,-1,-1,-1}; + +/* subframe_updateObject() flags */ +#define UPDATE_PARENTS (1<<0) +#define UPDATE_MESH (1<<1) +#define UPDATE_EVERYTHING (UPDATE_PARENTS|UPDATE_MESH) +/* surface_getBrushFlags() return vals */ +#define BRUSH_USES_VELOCITY (1<<0) +/* brush mesh raycast status */ +#define HIT_VOLUME 1 +#define HIT_PROXIMITY 2 +/* paint effect default movement per frame in global units */ +#define EFF_MOVEMENT_PER_FRAME 0.05f +/* initial wave time factor */ +#define WAVE_TIME_FAC 0.1 +/* drying limits */ +#define MIN_WETNESS 0.001f +/* dissolve macro */ +#define VALUE_DISSOLVE(VALUE, TIME, SCALE, LOG) (VALUE) = (LOG) ? (VALUE) * (pow(MIN_WETNESS,1.0f/(1.2f*((float)(TIME))/(SCALE)))) : (VALUE) - 1.0f/(TIME)*(SCALE) + +/***************************** Internal Structs ***************************/ + +typedef struct Bounds2D { + float min[2], max[2]; +} Bounds2D; + +typedef struct Bounds3D { + int valid; + float min[3], max[3]; +} Bounds3D; + +typedef struct VolumeGrid { + int dim[3]; + Bounds3D grid_bounds; /* whole grid bounds */ + + Bounds3D *bounds; /* (x*y*z) precalculated grid cell bounds */ + unsigned int *s_pos; /* (x*y*z) t_index begin id */ + unsigned int *s_num; /* (x*y*z) number of t_index points */ + unsigned int *t_index; /* actual surface point index, + access: (s_pos+s_num) */ +} VolumeGrid; + +typedef struct Vec3f { + float v[3]; +} Vec3f; + +typedef struct BakeNeighPoint { + float dir[3]; /* vector pointing towards this neighbour */ + float dist; /* distance to */ +} BakeNeighPoint; + +/* Surface data used while processing a frame */ +typedef struct PaintBakeNormal { + float invNorm[3]; /* current pixel world-space inverted normal */ + float normal_scale; /* normal directional scale for displace mapping */ +} PaintBakeNormal; + +/* Temp surface data used to process a frame */ +typedef struct PaintBakeData { + /* point space data */ + PaintBakeNormal *bNormal; + unsigned int *s_pos; /* index to start reading point sample realCoord */ + unsigned int *s_num; /* num of realCoord samples */ + Vec3f *realCoord; /* current pixel center world-space coordinates for each sample + * ordered as (s_pos+s_num)*/ + + /* adjacency info */ + BakeNeighPoint *bNeighs; /* current global neighbour distances and directions, if required */ + double average_dist; + /* space partitioning */ + VolumeGrid *grid; /* space partitioning grid to optimize brush checks */ + + /* velocity and movement */ + Vec3f *velocity; /* speed vector in global space movement per frame, if required */ + Vec3f *prev_velocity; + float *brush_velocity; /* special temp data for post-p velocity based brushes like smudge + * 3 float dir vec + 1 float str */ + MVert *prev_verts; /* copy of previous frame vertices. used to observe surface movement */ + float prev_obmat[4][4]; /* previous frame object matrix */ + int clear; /* flag to check if surface was cleared/reset -> have to redo velocity etc. */ + +} PaintBakeData; + +/* UV Image sequence format point */ +typedef struct PaintUVPoint { + /* Pixel / mesh data */ + unsigned int face_index, pixel_index; /* face index on domain derived mesh */ + unsigned int v1, v2, v3; /* vertex indexes */ + + unsigned int neighbour_pixel; /* If this pixel isn't uv mapped to any face, + but it's neighbouring pixel is */ + short quad; +} PaintUVPoint; + +typedef struct ImgSeqFormatData { + PaintUVPoint *uv_p; + Vec3f *barycentricWeights; /* b-weights for all pixel samples */ +} ImgSeqFormatData; + +typedef struct EffVelPoint { + float previous_pos[3]; + float previous_vel[3]; +} EffVelPoint; + + +/* adjacency data flags */ +#define ADJ_ON_MESH_EDGE (1<<0) + +typedef struct PaintAdjData { + unsigned int *n_target; /* array of neighbouring point indexes, + for single sample use (n_index+neigh_num) */ + unsigned int *n_index; /* index to start reading n_target for each point */ + unsigned int *n_num; /* num of neighs for each point */ + unsigned int *flags; /* vertex adjacency flags */ + unsigned int total_targets; /* size of n_target */ +} PaintAdjData; + +/***************************** General Utils ******************************/ + +/* Set canvas error string to display at the bake report */ +static int setError(DynamicPaintCanvasSettings *canvas, char *string) +{ + /* Add error to canvas ui info label */ + BLI_snprintf(canvas->error, sizeof(canvas->error), string); + return 0; +} + +/* Get number of surface points for cached types */ +static int dynamicPaint_surfaceNumOfPoints(DynamicPaintSurface *surface) +{ + if (surface->format == MOD_DPAINT_SURFACE_F_PTEX) { + return 0; /* not supported atm */ + } + else if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) { + if (!surface->canvas->dm) return 0; /* invalid derived mesh */ + return surface->canvas->dm->getNumVerts(surface->canvas->dm); + } + else + return 0; +} + +/* checks whether surface's format/type has realtime preview */ +int dynamicPaint_surfaceHasColorPreview(DynamicPaintSurface *surface) +{ + if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) return 0; + else if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) { + if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE || + surface->type == MOD_DPAINT_SURFACE_T_WAVE) return 0; + else return 1; + } + else return 1; +} + +/* get currently active surface (in user interface) */ +struct DynamicPaintSurface *get_activeSurface(DynamicPaintCanvasSettings *canvas) +{ + DynamicPaintSurface *surface = canvas->surfaces.first; + int i; + + for(i=0; surface; surface=surface->next) { + if(i == canvas->active_sur) + return surface; + i++; + } + return NULL; +} + +/* set preview to first previewable surface */ +void dynamicPaint_resetPreview(DynamicPaintCanvasSettings *canvas) +{ + DynamicPaintSurface *surface = canvas->surfaces.first; + int done=0; + + for(; surface; surface=surface->next) { + if (!done && dynamicPaint_surfaceHasColorPreview(surface)) { + surface->flags |= MOD_DPAINT_PREVIEW; + done=1; + } + else + surface->flags &= ~MOD_DPAINT_PREVIEW; + } +} + +/* set preview to defined surface */ +static void dynamicPaint_setPreview(DynamicPaintSurface *t_surface) +{ + DynamicPaintSurface *surface = t_surface->canvas->surfaces.first; + for(; surface; surface=surface->next) { + if (surface == t_surface) + surface->flags |= MOD_DPAINT_PREVIEW; + else + surface->flags &= ~MOD_DPAINT_PREVIEW; + } +} + +int dynamicPaint_outputLayerExists(struct DynamicPaintSurface *surface, Object *ob, int index) +{ + char *name; + + if (index == 0) + name = surface->output_name; + else if (index == 1) + name = surface->output_name2; + else + return 0; + + if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) { + if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) { + Mesh *me = ob->data; + return (CustomData_get_named_layer_index(&me->fdata, CD_MCOL, name) != -1); + } + else if (surface->type == MOD_DPAINT_SURFACE_T_WEIGHT) + return (defgroup_name_index(ob, surface->output_name) != -1); + } + + return 0; +} + +static int surface_duplicateOutputExists(void *arg, const char *name) +{ + DynamicPaintSurface *t_surface = (DynamicPaintSurface*)arg; + DynamicPaintSurface *surface = t_surface->canvas->surfaces.first; + + for(; surface; surface=surface->next) { + if (surface!=t_surface && surface->type==t_surface->type && + surface->format==t_surface->format) { + if (surface->output_name[0]!='\0' && !strcmp(name, surface->output_name)) return 1; + if (surface->output_name2[0]!='\0' && !strcmp(name, surface->output_name2)) return 1; + } + } + return 0; +} + +void surface_setUniqueOutputName(DynamicPaintSurface *surface, char *basename, int output) +{ + char name[64]; + BLI_strncpy(name, basename, sizeof(name)); /* in case basename is surface->name use a copy */ + if (!output) + BLI_uniquename_cb(surface_duplicateOutputExists, surface, name, '.', surface->output_name, sizeof(surface->output_name)); + if (output) + BLI_uniquename_cb(surface_duplicateOutputExists, surface, name, '.', surface->output_name2, sizeof(surface->output_name2)); +} + + +static int surface_duplicateNameExists(void *arg, const char *name) +{ + DynamicPaintSurface *t_surface = (DynamicPaintSurface*)arg; + DynamicPaintSurface *surface = t_surface->canvas->surfaces.first; + + for(; surface; surface=surface->next) { + if (surface!=t_surface && !strcmp(name, surface->name)) return 1; + } + return 0; +} + +void dynamicPaintSurface_setUniqueName(DynamicPaintSurface *surface, char *basename) +{ + char name[64]; + BLI_strncpy(name, basename, sizeof(name)); /* in case basename is surface->name use a copy */ + BLI_uniquename_cb(surface_duplicateNameExists, surface, name, '.', surface->name, sizeof(surface->name)); +} + + +/* change surface data to defaults on new type */ +void dynamicPaintSurface_updateType(struct DynamicPaintSurface *surface) +{ + if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) { + surface->output_name[0]='\0'; + surface->output_name2[0]='\0'; + surface->flags |= MOD_DPAINT_ANTIALIAS; + surface->depth_clamp = 1.0f; + } + else { + sprintf(surface->output_name, "dp_"); + strcpy(surface->output_name2,surface->output_name); + surface->flags &= ~MOD_DPAINT_ANTIALIAS; + surface->depth_clamp = 0.0f; + } + + if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) { + strcat(surface->output_name,"paintmap"); + strcat(surface->output_name2,"wetmap"); + surface_setUniqueOutputName(surface, surface->output_name2, 1); + } + else if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE) { + strcat(surface->output_name,"displace"); + } + else if (surface->type == MOD_DPAINT_SURFACE_T_WEIGHT) { + strcat(surface->output_name,"weight"); + } + else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) { + strcat(surface->output_name,"wave"); + } + + surface_setUniqueOutputName(surface, surface->output_name, 0); + + /* update preview */ + if (dynamicPaint_surfaceHasColorPreview(surface)) + dynamicPaint_setPreview(surface); + else + dynamicPaint_resetPreview(surface->canvas); +} + +static int surface_totalSamples(DynamicPaintSurface *surface) +{ + if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ && + surface->flags & MOD_DPAINT_ANTIALIAS) + return (surface->data->total_points*5); + if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX && + surface->flags & MOD_DPAINT_ANTIALIAS && surface->data->adj_data) + return (surface->data->total_points+surface->data->adj_data->total_targets); + + return surface->data->total_points; +} + +static void blendColors(float t_color[3], float t_alpha, float s_color[3], float s_alpha, float result[4]) +{ + int i; + float i_alpha = 1.0f - s_alpha; + float f_alpha = t_alpha*i_alpha + s_alpha; + + /* blend colors */ + if (f_alpha) { + for (i=0; i<3; i++) { + result[i] = (t_color[i]*t_alpha*i_alpha + s_color[i]*s_alpha)/f_alpha; + } + } + else { + copy_v3_v3(result, t_color); + } + /* return final alpha */ + result[3] = f_alpha; +} + +/* assumes source alpha > 0.0f or results NaN colors */ +static void mixColors(float *t_color, float t_alpha, float *s_color, float s_alpha) +{ + float factor = (s_alpha<t_alpha) ? 1.0f : t_alpha/s_alpha; + + /* set initial color depending on existing alpha */ + interp_v3_v3v3(t_color, s_color, t_color, factor); + /* mix final color */ + interp_v3_v3v3(t_color, t_color, s_color, s_alpha); +} + +/* set "ignore cache" flag for all caches on this object */ +static void object_cacheIgnoreClear(Object *ob, int state) +{ + ListBase pidlist; + PTCacheID *pid; + BKE_ptcache_ids_from_object(&pidlist, ob, NULL, 0); + + for(pid=pidlist.first; pid; pid=pid->next) { + if(pid->cache) { + if (state) + pid->cache->flag |= PTCACHE_IGNORE_CLEAR; + else + pid->cache->flag &= ~PTCACHE_IGNORE_CLEAR; + } + } + + BLI_freelistN(&pidlist); +} + +static void subframe_updateObject(Scene *scene, Object *ob, int flags, float frame) +{ + DynamicPaintModifierData *pmd = (DynamicPaintModifierData *)modifiers_findByType(ob, eModifierType_DynamicPaint); + + /* if other is dynamic paint canvas, dont update */ + if (pmd && pmd->canvas) + return; + + /* if object has parent, update it too */ + if ((flags & UPDATE_PARENTS) && ob->parent) subframe_updateObject(scene, ob->parent, 0, frame); + if ((flags & UPDATE_PARENTS) && ob->track) subframe_updateObject(scene, ob->track, 0, frame); + + /* for curve following objects, parented curve has to be updated too */ + if(ob->type==OB_CURVE) { + Curve *cu= ob->data; + BKE_animsys_evaluate_animdata(scene, &cu->id, cu->adt, frame, ADT_RECALC_ANIM); + } + + ob->recalc |= OB_RECALC_ALL; + BKE_animsys_evaluate_animdata(scene, &ob->id, ob->adt, frame, ADT_RECALC_ANIM); + if (flags & UPDATE_MESH) { + /* ignore cache clear during subframe updates + * to not mess up cache validity */ + object_cacheIgnoreClear(ob, 1); + object_handle_update(scene, ob); + object_cacheIgnoreClear(ob, 0); + } + else + where_is_object_time(scene, ob, frame); +} + +static void scene_setSubframe(Scene *scene, float subframe) +{ + /* dynamic paint subframes must be done on previous frame */ + scene->r.cfra -= 1; + scene->r.subframe = subframe; +} + +#define BRUSH_USES_VELOCITY (1<<0) + +static int surface_getBrushFlags(DynamicPaintSurface *surface, Scene *scene, Object *ob) +{ + Base *base = NULL; + GroupObject *go = NULL; + Object *brushObj = NULL; + ModifierData *md = NULL; + + int flags = 0; + + if(surface->brush_group) + go = surface->brush_group->gobject.first; + else + base = scene->base.first; + + while (base || go) + { + brushObj = NULL; + + /* select object */ + if(surface->brush_group) { + if(go->ob) brushObj = go->ob; + } + else + brushObj = base->object; + + if(!brushObj) + { + if(surface->brush_group) go = go->next; + else base= base->next; + continue; + } + + if(surface->brush_group) + go = go->next; + else + base= base->next; + + md = modifiers_findByType(brushObj, eModifierType_DynamicPaint); + if(md && md->mode & (eModifierMode_Realtime | eModifierMode_Render)) + { + DynamicPaintModifierData *pmd2 = (DynamicPaintModifierData *)md; + + if (pmd2->brush) + { + DynamicPaintBrushSettings *brush = pmd2->brush; + + if (brush->flags & MOD_DPAINT_USES_VELOCITY) + flags |= BRUSH_USES_VELOCITY; + } + } + } + + return flags; +} + +/* check whether two bounds intersect */ +static int boundsIntersect(Bounds3D *b1, Bounds3D *b2) +{ + int i=2; + if (!b1->valid || !b2->valid) return 0; + for (; i>=0; i-=1) + if (!(b1->min[i] <= b2->max[i] && b1->max[i] >= b2->min[i])) return 0; + return 1; +} + +/* check whether two bounds intersect inside defined proximity */ +static int boundsIntersectDist(Bounds3D *b1, Bounds3D *b2, float dist) +{ + int i=2; + if (!b1->valid || !b2->valid) return 0; + for (; i>=0; i-=1) + if (!(b1->min[i] <= (b2->max[i]+dist) && b1->max[i] >= (b2->min[i]-dist))) return 0; + return 1; +} + +/* check whether bounds intersects a point with given radius */ +static int boundIntersectPoint(Bounds3D *b, float point[3], float radius) +{ + int i=2; + if (!b->valid) return 0; + for (; i>=0; i-=1) + if (!(b->min[i] <= (point[i]+radius) && b->max[i] >= (point[i]-radius))) return 0; + return 1; +} + +/* expand bounds by a new point */ +static void boundInsert(Bounds3D *b, float point[3]) +{ + int i=2; + if (!b->valid) { + copy_v3_v3(b->min, point); + copy_v3_v3(b->max, point); + b->valid = 1; + } + else { + for (; i>=0; i-=1) { + if (point[i] < b->min[i]) b->min[i]=point[i]; + if (point[i] > b->max[i]) b->max[i]=point[i]; + } + } +} + +static void freeGrid(PaintSurfaceData *data) +{ + PaintBakeData *bData = data->bData; + VolumeGrid *grid = bData->grid; + + if (grid->bounds) MEM_freeN(grid->bounds); + if (grid->s_pos) MEM_freeN(grid->s_pos); + if (grid->s_num) MEM_freeN(grid->s_num); + if (grid->t_index) MEM_freeN(grid->t_index); + + MEM_freeN(bData->grid); + bData->grid = NULL; +} + +static void surfaceGenerateGrid(struct DynamicPaintSurface *surface) +{ + PaintSurfaceData *sData = surface->data; + PaintBakeData *bData = sData->bData; + Bounds3D *grid_bounds; + VolumeGrid *grid; + int grid_cells, axis = 3; + int *temp_t_index = NULL; + int *temp_s_num = NULL; + +#ifdef _OPENMP + int num_of_threads = omp_get_max_threads(); +#else + int num_of_threads = 1; +#endif + + if (bData->grid) + freeGrid(sData); + + /* allocate separate bounds for each thread */ + grid_bounds = MEM_callocN(sizeof(Bounds3D)*num_of_threads, "Grid Bounds"); + bData->grid = MEM_callocN(sizeof(VolumeGrid), "Surface Grid"); + grid = bData->grid; + + if (grid && grid_bounds) { + int i, error = 0; + float dim_factor, volume, dim[3]; + float td[3]; + float min_dim; + + /* calculate canvas dimensions */ + #pragma omp parallel for schedule(static) + for (i=0; i<sData->total_points; i++) { + #ifdef _OPENMP + int id = omp_get_thread_num(); + boundInsert(&grid_bounds[id], (bData->realCoord[bData->s_pos[i]].v)); + #else + boundInsert(&grid_bounds[0], (bData->realCoord[bData->s_pos[i]].v)); + #endif + } + + /* get final dimensions */ + for (i=0; i<num_of_threads; i++) { + boundInsert(&grid->grid_bounds, grid_bounds[i].min); + boundInsert(&grid->grid_bounds, grid_bounds[i].max); + } + + /* get dimensions */ + sub_v3_v3v3(dim, grid->grid_bounds.max, grid->grid_bounds.min); + copy_v3_v3(td, dim); + min_dim = MAX3(td[0],td[1],td[2]) / 1000.f; + + /* deactivate zero axises */ + for (i=0; i<3; i++) { + if (td[i]<min_dim) {td[i]=1.0f; axis-=1;} + } + + if (axis == 0 || MAX3(td[0],td[1],td[2]) < 0.0001f) { + MEM_freeN(grid_bounds); + MEM_freeN(bData->grid); + bData->grid = NULL; + return; + } + + /* now calculate grid volume/area/width depending on num of active axis */ + volume = td[0]*td[1]*td[2]; + + /* determine final grid size by trying to fit average 10.000 points per grid cell */ + dim_factor = pow(volume / ((double)sData->total_points / 10000.f), 1.0f/axis); + + /* define final grid size using dim_factor, use min 3 for active axises */ + for (i=0; i<3; i++) { + grid->dim[i] = (int)floor(td[i] / dim_factor); + CLAMP(grid->dim[i], (dim[i]>=min_dim) ? 3 : 1, 100); + } + grid_cells = grid->dim[0]*grid->dim[1]*grid->dim[2]; + + /* allocate memory for grids */ + grid->bounds = MEM_callocN(sizeof(Bounds3D) * grid_cells, "Surface Grid Bounds"); + grid->s_pos = MEM_callocN(sizeof(int) * grid_cells, "Surface Grid Position"); + grid->s_num = MEM_callocN(sizeof(int) * grid_cells*num_of_threads, "Surface Grid Points"); + temp_s_num = MEM_callocN(sizeof(int) * grid_cells, "Temp Surface Grid Points"); + grid->t_index = MEM_callocN(sizeof(int) * sData->total_points, "Surface Grid Target Ids"); + temp_t_index = MEM_callocN(sizeof(int) * sData->total_points, "Temp Surface Grid Target Ids"); + + /* in case of an allocation failture abort here */ + if (!grid->bounds || !grid->s_pos || !grid->s_num || !grid->t_index || !temp_s_num || !temp_t_index) + error = 1; + + if (!error) { + /* calculate number of points withing each cell */ + #pragma omp parallel for schedule(static) + for (i=0; i<sData->total_points; i++) { + int co[3], j; + for (j=0; j<3; j++) { + co[j] = floor((bData->realCoord[bData->s_pos[i]].v[j] - grid->grid_bounds.min[j])/dim[j]*grid->dim[j]); + CLAMP(co[j], 0, grid->dim[j]-1); + } + + temp_t_index[i] = co[0] + co[1] * grid->dim[0] + co[2] * grid->dim[0]*grid->dim[1]; + #ifdef _OPENMP + grid->s_num[temp_t_index[i]+omp_get_thread_num()*grid_cells]++; + #else + grid->s_num[temp_t_index[i]]++; + #endif + } + + /* for first cell only calc s_num */ + for (i=1; i<num_of_threads; i++) { + grid->s_num[0] += grid->s_num[i*grid_cells]; + } + + /* calculate grid indexes */ + for (i=1; i<grid_cells; i++) { + int id; + for (id=1; id<num_of_threads; id++) { + grid->s_num[i] += grid->s_num[i+id*grid_cells]; + } + grid->s_pos[i] = grid->s_pos[i-1] + grid->s_num[i-1]; + } + + /* save point indexes to final array */ + for (i=0; i<sData->total_points; i++) { + int pos = grid->s_pos[temp_t_index[i]] + temp_s_num[temp_t_index[i]]; + grid->t_index[pos] = i; + + temp_s_num[temp_t_index[i]]++; + } + + /* calculate cell bounds */ + { + int x; + #pragma omp parallel for schedule(static) + for (x=0; x<grid->dim[0]; x++) { + int y; + for (y=0; y<grid->dim[1]; y++) { + int z; + for (z=0; z<grid->dim[2]; z++) { + int j, b_index = x + y * grid->dim[0] + z * grid->dim[0]*grid->dim[1]; + /* set bounds */ + for (j=0; j<3; j++) { + int s = (j==0) ? x : ((j==1) ? y : z); + grid->bounds[b_index].min[j] = grid->grid_bounds.min[j] + dim[j]/grid->dim[j]*s; + grid->bounds[b_index].max[j] = grid->grid_bounds.min[j] + dim[j]/grid->dim[j]*(s+1); + } + grid->bounds[b_index].valid = 1; + } + } + } + } + } + + if (temp_s_num) MEM_freeN(temp_s_num); + if (temp_t_index) MEM_freeN(temp_t_index); + + /* free per thread s_num values */ + grid->s_num = MEM_reallocN(grid->s_num, sizeof(int) * grid_cells); + + if (error || !grid->s_num) { + setError(surface->canvas, "Not enough free memory."); + freeGrid(sData); + } + } + + if (grid_bounds) MEM_freeN(grid_bounds); +} + +/***************************** Freeing data ******************************/ + +/* Free brush data */ +void dynamicPaint_freeBrush(struct DynamicPaintModifierData *pmd) +{ + if(pmd->brush) { + if(pmd->brush->dm) + pmd->brush->dm->release(pmd->brush->dm); + pmd->brush->dm = NULL; + + if(pmd->brush->paint_ramp) + MEM_freeN(pmd->brush->paint_ramp); + pmd->brush->paint_ramp = NULL; + if(pmd->brush->vel_ramp) + MEM_freeN(pmd->brush->vel_ramp); + pmd->brush->vel_ramp = NULL; + + MEM_freeN(pmd->brush); + pmd->brush = NULL; + } +} + +static void dynamicPaint_freeAdjData(PaintSurfaceData *data) +{ + if (data->adj_data) { + if (data->adj_data->n_index) MEM_freeN(data->adj_data->n_index); + if (data->adj_data->n_num) MEM_freeN(data->adj_data->n_num); + if (data->adj_data->n_target) MEM_freeN(data->adj_data->n_target); + if (data->adj_data->flags) MEM_freeN(data->adj_data->flags); + MEM_freeN(data->adj_data); + data->adj_data = NULL; + } +} + +static void free_bakeData(PaintSurfaceData *data) +{ + PaintBakeData *bData = data->bData; + if (bData) { + if (bData->bNormal) MEM_freeN(bData->bNormal); + if (bData->s_pos) MEM_freeN(bData->s_pos); + if (bData->s_num) MEM_freeN(bData->s_num); + if (bData->realCoord) MEM_freeN(bData->realCoord); + if (bData->bNeighs) MEM_freeN(bData->bNeighs); + if (bData->grid) freeGrid(data); + if (bData->prev_verts) MEM_freeN(bData->prev_verts); + if (bData->velocity) MEM_freeN(bData->velocity); + if (bData->prev_velocity) MEM_freeN(bData->prev_velocity); + + MEM_freeN(data->bData); + data->bData = NULL; + } +} + +/* free surface data if it's not used anymore */ +void surface_freeUnusedData(DynamicPaintSurface *surface) +{ + if (!surface->data) return; + + /* free bakedata if not active or surface is baked */ + if (!(surface->flags & MOD_DPAINT_ACTIVE) || + (surface->pointcache && surface->pointcache->flag & PTCACHE_BAKED)) + free_bakeData(surface->data); +} + +void dynamicPaint_freeSurfaceData(DynamicPaintSurface *surface) +{ + PaintSurfaceData *data = surface->data; + if (!data) return; + if (data->format_data) { + /* format specific free */ + if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) { + ImgSeqFormatData *format_data = (ImgSeqFormatData*)data->format_data; + if (format_data->uv_p) + MEM_freeN(format_data->uv_p); + if (format_data->barycentricWeights) + MEM_freeN(format_data->barycentricWeights); + } + MEM_freeN(data->format_data); + } + /* type data */ + if (data->type_data) MEM_freeN(data->type_data); + dynamicPaint_freeAdjData(data); + /* bake data */ + free_bakeData(data); + + MEM_freeN(surface->data); + surface->data = NULL; +} + +void dynamicPaint_freeSurface(DynamicPaintSurface *surface) +{ + /* point cache */ + BKE_ptcache_free_list(&(surface->ptcaches)); + surface->pointcache = NULL; + + if(surface->effector_weights) + MEM_freeN(surface->effector_weights); + surface->effector_weights = NULL; + + BLI_remlink(&(surface->canvas->surfaces), surface); + dynamicPaint_freeSurfaceData(surface); + MEM_freeN(surface); +} + +/* Free canvas data */ +void dynamicPaint_freeCanvas(DynamicPaintModifierData *pmd) +{ + if(pmd->canvas) { + /* Free surface data */ + DynamicPaintSurface *surface = pmd->canvas->surfaces.first; + DynamicPaintSurface *next_surface = NULL; + + while (surface) { + next_surface = surface->next; + dynamicPaint_freeSurface(surface); + surface = next_surface; + } + + /* free dm copy */ + if (pmd->canvas->dm) + pmd->canvas->dm->release(pmd->canvas->dm); + pmd->canvas->dm = NULL; + + MEM_freeN(pmd->canvas); + pmd->canvas = NULL; + } +} + +/* Free whole dp modifier */ +void dynamicPaint_Modifier_free(struct DynamicPaintModifierData *pmd) +{ + if(pmd) { + dynamicPaint_freeCanvas(pmd); + dynamicPaint_freeBrush(pmd); + } +} + + +/***************************** Initialize and reset ******************************/ + +/* +* Creates a new surface and adds it to the list +* If scene is null, frame range of 1-250 is used +* A pointer to this surface is returned +*/ +struct DynamicPaintSurface *dynamicPaint_createNewSurface(DynamicPaintCanvasSettings *canvas, Scene *scene) +{ + DynamicPaintSurface *surface= MEM_callocN(sizeof(DynamicPaintSurface), "DynamicPaintSurface"); + if (!surface) return NULL; + + surface->canvas = canvas; + surface->format = MOD_DPAINT_SURFACE_F_VERTEX; + surface->type = MOD_DPAINT_SURFACE_T_PAINT; + + /* cache */ + surface->pointcache = BKE_ptcache_add(&(surface->ptcaches)); + surface->pointcache->flag |= PTCACHE_DISK_CACHE; + surface->pointcache->step = 1; + + /* Set initial values */ + surface->flags = MOD_DPAINT_ANTIALIAS | MOD_DPAINT_MULALPHA | MOD_DPAINT_DRY_LOG | MOD_DPAINT_DISSOLVE_LOG | + MOD_DPAINT_ACTIVE | MOD_DPAINT_PREVIEW | MOD_DPAINT_OUT1; + surface->effect = 0; + surface->effect_ui = 1; + + surface->diss_speed = 250; + surface->dry_speed = 500; + surface->depth_clamp = 0.0f; + surface->disp_factor = 1.0f; + surface->disp_type = MOD_DPAINT_DISP_DISPLACE; + surface->image_fileformat = MOD_DPAINT_IMGFORMAT_PNG; + + surface->init_color[0] = 1.0f; + surface->init_color[1] = 1.0f; + surface->init_color[2] = 1.0f; + surface->init_color[3] = 1.0f; + + surface->image_resolution = 256; + surface->substeps = 0; + + if (scene) { + surface->start_frame = scene->r.sfra; + surface->end_frame = scene->r.efra; + } + else { + surface->start_frame = 1; + surface->end_frame = 250; + } + + surface->spread_speed = 1.0f; + surface->color_spread_speed = 1.0f; + surface->shrink_speed = 1.0f; + + surface->wave_damping = 0.05f; + surface->wave_speed = 1.0f; + surface->wave_timescale = 1.0f; + surface->wave_spring = 0.20; + + BLI_snprintf(surface->image_output_path, sizeof(surface->image_output_path), "%sdynamicpaint", U.textudir); + BLI_cleanup_dir(NULL, surface->image_output_path); + dynamicPaintSurface_setUniqueName(surface, "Surface"); + + surface->effector_weights = BKE_add_effector_weights(NULL); + + dynamicPaintSurface_updateType(surface); + + BLI_addtail(&canvas->surfaces, surface); + + return surface; +} + +/* +* Initialize modifier data +*/ +int dynamicPaint_createType(struct DynamicPaintModifierData *pmd, int type, struct Scene *scene) +{ + if(pmd) { + if(type == MOD_DYNAMICPAINT_TYPE_CANVAS) { + DynamicPaintCanvasSettings *canvas; + if(pmd->canvas) + dynamicPaint_freeCanvas(pmd); + + canvas = pmd->canvas = MEM_callocN(sizeof(DynamicPaintCanvasSettings), "DynamicPaint Canvas"); + if (!canvas) + return 0; + canvas->pmd = pmd; + canvas->dm = NULL; + + /* Create one surface */ + if (!dynamicPaint_createNewSurface(canvas, scene)) + return 0; + + } + else if(type == MOD_DYNAMICPAINT_TYPE_BRUSH) { + DynamicPaintBrushSettings *brush; + if(pmd->brush) + dynamicPaint_freeBrush(pmd); + + brush = pmd->brush = MEM_callocN(sizeof(DynamicPaintBrushSettings), "DynamicPaint Paint"); + if (!brush) + return 0; + brush->pmd = pmd; + + brush->psys = NULL; + + brush->flags = MOD_DPAINT_ABS_ALPHA | MOD_DPAINT_RAMP_ALPHA; + brush->collision = MOD_DPAINT_COL_VOLUME; + + brush->mat = NULL; + brush->r = 0.15f; + brush->g = 0.4f; + brush->b = 0.8f; + brush->alpha = 1.0f; + brush->wetness = 1.0f; + + brush->paint_distance = 1.0f; + brush->proximity_falloff = MOD_DPAINT_PRFALL_SMOOTH; + + brush->particle_radius = 0.2f; + brush->particle_smooth = 0.05f; + + brush->wave_factor = 1.0f; + brush->wave_clamp = 0.0f; + brush->smudge_strength = 0.3f; + brush->max_velocity = 1.0f; + + brush->dm = NULL; + + /* Paint proximity falloff colorramp. */ + { + CBData *ramp; + + brush->paint_ramp = add_colorband(0); + if (!brush->paint_ramp) + return 0; + ramp = brush->paint_ramp->data; + /* Add default smooth-falloff ramp. */ + ramp[0].r = ramp[0].g = ramp[0].b = ramp[0].a = 1.0f; + ramp[0].pos = 0.0f; + ramp[1].r = ramp[1].g = ramp[1].b = ramp[1].pos = 1.0f; + ramp[1].a = 0.0f; + pmd->brush->paint_ramp->tot = 2; + } + + /* Brush velocity ramp. */ + { + CBData *ramp; + + brush->vel_ramp = add_colorband(0); + if (!brush->vel_ramp) + return 0; + ramp = brush->vel_ramp->data; + ramp[0].r = ramp[0].g = ramp[0].b = ramp[0].a = ramp[0].pos = 0.0f; + ramp[1].r = ramp[1].g = ramp[1].b = ramp[1].a = ramp[1].pos = 1.0f; + brush->paint_ramp->tot = 2; + } + } + } + else + return 0; + + return 1; +} + +void dynamicPaint_Modifier_copy(struct DynamicPaintModifierData *pmd, struct DynamicPaintModifierData *tpmd) +{ + /* Init modifier */ + tpmd->type = pmd->type; + if (pmd->canvas) + dynamicPaint_createType(tpmd, MOD_DYNAMICPAINT_TYPE_CANVAS, NULL); + if (pmd->brush) + dynamicPaint_createType(tpmd, MOD_DYNAMICPAINT_TYPE_BRUSH, NULL); + + /* Copy data */ + if (tpmd->canvas) { + tpmd->canvas->pmd = tpmd; + + } else if (tpmd->brush) { + DynamicPaintBrushSettings *brush = pmd->brush, *t_brush = tpmd->brush; + t_brush->pmd = tpmd; + + t_brush->flags = brush->flags; + t_brush->collision = brush->collision; + + t_brush->mat = brush->mat; + t_brush->r = brush->r; + t_brush->g = brush->g; + t_brush->b = brush->b; + t_brush->alpha = brush->alpha; + t_brush->wetness = brush->wetness; + + t_brush->particle_radius = brush->particle_radius; + t_brush->particle_smooth = brush->particle_smooth; + t_brush->paint_distance = brush->paint_distance; + t_brush->psys = brush->psys; + + if (brush->paint_ramp) + memcpy(t_brush->paint_ramp, brush->paint_ramp, sizeof(ColorBand)); + if (brush->vel_ramp) + memcpy(t_brush->vel_ramp, brush->vel_ramp, sizeof(ColorBand)); + + t_brush->proximity_falloff = brush->proximity_falloff; + t_brush->wave_type = brush->wave_type; + t_brush->ray_dir = brush->ray_dir; + + t_brush->wave_factor = brush->wave_factor; + t_brush->wave_clamp = brush->wave_clamp; + t_brush->max_velocity = brush->max_velocity; + t_brush->smudge_strength = brush->smudge_strength; + } +} + +/* allocates surface data depending on surface type */ +static void dynamicPaint_allocateSurfaceType(DynamicPaintSurface *surface) +{ + PaintSurfaceData *sData = surface->data; + + switch (surface->type) { + case MOD_DPAINT_SURFACE_T_PAINT: + sData->type_data = MEM_callocN(sizeof(PaintPoint)*sData->total_points, "DynamicPaintSurface Data"); + break; + case MOD_DPAINT_SURFACE_T_DISPLACE: + sData->type_data = MEM_callocN(sizeof(float)*sData->total_points, "DynamicPaintSurface DepthData"); + break; + case MOD_DPAINT_SURFACE_T_WEIGHT: + sData->type_data = MEM_callocN(sizeof(float)*sData->total_points, "DynamicPaintSurface WeightData"); + break; + case MOD_DPAINT_SURFACE_T_WAVE: + sData->type_data = MEM_callocN(sizeof(PaintWavePoint)*sData->total_points, "DynamicPaintSurface WaveData"); + break; + } + + if (sData->type_data == NULL) setError(surface->canvas, "Not enough free memory!"); +} + +static int surface_usesAdjDistance(DynamicPaintSurface *surface) +{ + if (surface->type == MOD_DPAINT_SURFACE_T_PAINT && surface->effect) return 1; + if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) return 1; + return 0; +} + +static int surface_usesAdjData(DynamicPaintSurface *surface) +{ + if (surface_usesAdjDistance(surface)) return 1; + if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX && + surface->flags & MOD_DPAINT_ANTIALIAS) return 1; + + return 0; +} + +/* initialize surface adjacency data */ +static void dynamicPaint_initAdjacencyData(DynamicPaintSurface *surface, int force_init) +{ + PaintSurfaceData *sData = surface->data; + PaintAdjData *ed; + int *temp_data; + int neigh_points = 0; + + if (!surface_usesAdjData(surface) && !force_init) return; + + if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) { + /* For vertex format, neighbours are connected by edges */ + neigh_points = 2*surface->canvas->dm->getNumEdges(surface->canvas->dm); + } + else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) + neigh_points = sData->total_points*8; + + if (!neigh_points) return; + + /* allocate memory */ + ed = sData->adj_data = MEM_callocN(sizeof(PaintAdjData), "Surface Adj Data"); + if (!ed) return; + ed->n_index = MEM_callocN(sizeof(int)*sData->total_points, "Surface Adj Index"); + ed->n_num = MEM_callocN(sizeof(int)*sData->total_points, "Surface Adj Counts"); + temp_data = MEM_callocN(sizeof(int)*sData->total_points, "Temp Adj Data"); + ed->n_target = MEM_callocN(sizeof(int)*neigh_points, "Surface Adj Targets"); + ed->flags = MEM_callocN(sizeof(int)*sData->total_points, "Surface Adj Flags"); + ed->total_targets = neigh_points; + + /* in case of allocation error, free memory */ + if (!ed->n_index || !ed->n_num || !ed->n_target || !temp_data) { + dynamicPaint_freeAdjData(sData); + if (temp_data) MEM_freeN(temp_data); + setError(surface->canvas, "Not enough free memory."); + return; + } + + if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) { + int i; + int n_pos; + + /* For vertex format, count every vertex that is connected by an edge */ + int numOfEdges = surface->canvas->dm->getNumEdges(surface->canvas->dm); + int numOfFaces = surface->canvas->dm->getNumFaces(surface->canvas->dm); + struct MEdge *edge = surface->canvas->dm->getEdgeArray(surface->canvas->dm); + struct MFace *face = surface->canvas->dm->getFaceArray(surface->canvas->dm); + + /* count number of edges per vertex */ + for (i=0; i<numOfEdges; i++) { + ed->n_num[edge[i].v1]++; + ed->n_num[edge[i].v2]++; + + temp_data[edge[i].v1]++; + temp_data[edge[i].v2]++; + } + + /* to locate points on "mesh edge" */ + for (i=0; i<numOfFaces; i++) { + temp_data[face[i].v1]++; + temp_data[face[i].v2]++; + temp_data[face[i].v3]++; + if (face[i].v4) + temp_data[face[i].v4]++; + } + + /* now check if total number of edges+faces for + * each vertex is even, if not -> vertex is on mesh edge */ + for (i=0; i<sData->total_points; i++) { + if ((temp_data[i]%2) || + temp_data[i] < 4) + ed->flags[i] |= ADJ_ON_MESH_EDGE; + + /* reset temp data */ + temp_data[i] = 0; + } + + /* order n_index array */ + n_pos = 0; + for (i=0; i<sData->total_points; i++) { + ed->n_index[i] = n_pos; + n_pos += ed->n_num[i]; + } + + /* and now add neighbour data using that info */ + for (i=0; i<numOfEdges; i++) { + /* first vertex */ + int index = edge[i].v1; + n_pos = ed->n_index[index]+temp_data[index]; + ed->n_target[n_pos] = edge[i].v2; + temp_data[index]++; + + /* second vertex */ + index = edge[i].v2; + n_pos = ed->n_index[index]+temp_data[index]; + ed->n_target[n_pos] = edge[i].v1; + temp_data[index]++; + } + } + else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) { + /* for image sequences, only allocate memory. + * bake initialization takes care of rest */ + } + + MEM_freeN(temp_data); +} + +void dynamicPaint_setInitialColor(DynamicPaintSurface *surface) +{ + PaintSurfaceData *sData = surface->data; + PaintPoint* pPoint = (PaintPoint*)sData->type_data; + DerivedMesh *dm = surface->canvas->dm; + int i; + + if (surface->type != MOD_DPAINT_SURFACE_T_PAINT) + return; + + if (surface->init_color_type == MOD_DPAINT_INITIAL_NONE) + return; + /* Single color */ + else if (surface->init_color_type == MOD_DPAINT_INITIAL_COLOR) { + /* apply color to every surface point */ + #pragma omp parallel for schedule(static) + for (i=0; i<sData->total_points; i++) { + copy_v3_v3(pPoint[i].color, surface->init_color); + pPoint[i].alpha = surface->init_color[3]; + } + } + /* UV mapped texture */ + else if (surface->init_color_type == MOD_DPAINT_INITIAL_TEXTURE) { + Tex *tex = surface->init_texture; + MTFace *tface; + MFace *mface = dm->getFaceArray(dm); + int numOfFaces = dm->getNumFaces(dm); + char uvname[40]; + + if (!tex) return; + + /* get uv layer */ + CustomData_validate_layer_name(&dm->faceData, CD_MTFACE, surface->init_layername, uvname); + tface = CustomData_get_layer_named(&dm->faceData, CD_MTFACE, uvname); + if (!tface) return; + + /* for vertex surface loop through tfaces and find uv color + * that provides highest alpha */ + if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) { + #pragma omp parallel for schedule(static) + for (i=0; i<numOfFaces; i++) { + int numOfVert = (mface[i].v4) ? 4 : 3; + float uv[3] = {0.0f}; + int j; + for (j=0; j<numOfVert; j++) { + TexResult texres = {0}; + unsigned int *vert = (&mface[i].v1)+j; + + /* remap to -1.0 to 1.0 */ + uv[0] = tface[i].uv[j][0]*2.0f - 1.0f; + uv[1] = tface[i].uv[j][1]*2.0f - 1.0f; + + multitex_ext_safe(tex, uv, &texres); + + if (texres.tin > pPoint[*vert].alpha) { + copy_v3_v3(pPoint[*vert].color, &texres.tr); + pPoint[*vert].alpha = texres.tin; + } + } + } + } + else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) { + ImgSeqFormatData *f_data = (ImgSeqFormatData*)sData->format_data; + int samples = (surface->flags & MOD_DPAINT_ANTIALIAS) ? 5 : 1; + + #pragma omp parallel for schedule(static) + for (i=0; i<sData->total_points; i++) { + float uv[9] = {0.0f}; + float uv_final[3] = {0.0f}; + int j; + TexResult texres = {0}; + + /* collect all uvs */ + for (j=0; j<3; j++) { + int v=(f_data->uv_p[i].quad && j>0) ? j+1 : j; + copy_v2_v2(&uv[j*3], tface[f_data->uv_p[i].face_index].uv[v]); + } + + /* interpolate final uv pos */ + interp_v3_v3v3v3( uv_final, &uv[0], &uv[3], &uv[6], + f_data->barycentricWeights[i*samples].v); + /* remap to -1.0 to 1.0 */ + uv_final[0] = uv_final[0]*2.0f - 1.0f; + uv_final[1] = uv_final[1]*2.0f - 1.0f; + + multitex_ext_safe(tex, uv_final, &texres); + + /* apply color */ + copy_v3_v3(pPoint[i].color, &texres.tr); + pPoint[i].alpha = texres.tin; + } + } + } + /* vertex color layer */ + else if (surface->init_color_type == MOD_DPAINT_INITIAL_VERTEXCOLOR) { + MCol *col = CustomData_get_layer_named(&dm->faceData, CD_MCOL, surface->init_layername); + if (!col) return; + + /* for vertex surface, just copy colors from mcol */ + if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) { + MFace *mface = dm->getFaceArray(dm); + int numOfFaces = dm->getNumFaces(dm); + + #pragma omp parallel for schedule(static) + for (i=0; i<numOfFaces; i++) { + int numOfVert = (mface[i].v4) ? 4 : 3; + int j; + for (j=0; j<numOfVert; j++) { + unsigned int *vert = ((&mface[i].v1)+j); + + pPoint[*vert].color[0] = 1.0f/255.f*(float)col[i*4+j].b; + pPoint[*vert].color[1] = 1.0f/255.f*(float)col[i*4+j].g; + pPoint[*vert].color[2] = 1.0f/255.f*(float)col[i*4+j].r; + pPoint[*vert].alpha = 1.0f/255.f*(float)col[i*4+j].a; + } + } + } + else if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) { + ImgSeqFormatData *f_data = (ImgSeqFormatData*)sData->format_data; + int samples = (surface->flags & MOD_DPAINT_ANTIALIAS) ? 5 : 1; + + #pragma omp parallel for schedule(static) + for (i=0; i<sData->total_points; i++) { + int face_ind = f_data->uv_p[i].face_index; + float colors[3][4] = {{0.0f,0.0f,0.0f,0.0f}}; + float final_color[4]; + int j; + /* collect color values */ + for (j=0; j<3; j++) { + int v=(f_data->uv_p[i].quad && j>0) ? j+1 : j; + colors[j][0] = 1.0f/255.f*(float)col[face_ind*4+v].b; + colors[j][1] = 1.0f/255.f*(float)col[face_ind*4+v].g; + colors[j][2] = 1.0f/255.f*(float)col[face_ind*4+v].r; + colors[j][3] = 1.0f/255.f*(float)col[face_ind*4+v].a; + } + + /* interpolate final color */ + interp_v4_v4v4v4( final_color, colors[0], colors[1], colors[2], + f_data->barycentricWeights[i*samples].v); + + copy_v3_v3(pPoint[i].color, final_color); + pPoint[i].alpha = final_color[3]; + } + } + } +} + +/* clears surface data back to zero */ +void dynamicPaint_clearSurface(DynamicPaintSurface *surface) +{ + PaintSurfaceData *sData = surface->data; + if (sData && sData->type_data) { + unsigned int data_size; + + if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) + data_size = sizeof(PaintPoint); + else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) + data_size = sizeof(PaintWavePoint); + else + data_size = sizeof(float); + + memset(sData->type_data, 0, data_size * sData->total_points); + + /* set initial color */ + if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) + dynamicPaint_setInitialColor(surface); + + if (sData->bData) + sData->bData->clear = 1; + } +} + +/* completely (re)initializes surface (only for point cache types)*/ +int dynamicPaint_resetSurface(DynamicPaintSurface *surface) +{ + int numOfPoints = dynamicPaint_surfaceNumOfPoints(surface); + /* dont touch image sequence types. they get handled only on bake */ + if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) return 1; + + if (surface->data) dynamicPaint_freeSurfaceData(surface); + if (numOfPoints < 1) return 0; + + /* allocate memory */ + surface->data = MEM_callocN(sizeof(PaintSurfaceData), "PaintSurfaceData"); + if (!surface->data) return 0; + + /* allocate data depending on surface type and format */ + surface->data->total_points = numOfPoints; + dynamicPaint_allocateSurfaceType(surface); + dynamicPaint_initAdjacencyData(surface, 0); + + /* set initial color */ + if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) + dynamicPaint_setInitialColor(surface); + + return 1; +} + +/* make sure allocated surface size matches current requirements */ +static void dynamicPaint_checkSurfaceData(DynamicPaintSurface *surface) +{ + if (!surface->data || ((dynamicPaint_surfaceNumOfPoints(surface) != surface->data->total_points))) { + dynamicPaint_resetSurface(surface); + } +} + + +/***************************** Modifier processing ******************************/ + + +/* apply displacing vertex surface to the derived mesh */ +static void dynamicPaint_applySurfaceDisplace(DynamicPaintSurface *surface, DerivedMesh *result, int update_normals) +{ + PaintSurfaceData *sData = surface->data; + + if (!sData || surface->format != MOD_DPAINT_SURFACE_F_VERTEX) return; + + /* displace paint */ + if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE) { + MVert *mvert = result->getVertArray(result); + int i; + float* value = (float*)sData->type_data; + + #pragma omp parallel for schedule(static) + for (i=0; i<sData->total_points; i++) { + float normal[3], val=value[i]*surface->disp_factor; + normal_short_to_float_v3(normal, mvert[i].no); + normalize_v3(normal); + + mvert[i].co[0] -= normal[0]*val; + mvert[i].co[1] -= normal[1]*val; + mvert[i].co[2] -= normal[2]*val; + } + } + else return; + + if (update_normals) + CDDM_calc_normals(result); +} + +/* +* Apply canvas data to the object derived mesh +*/ +static struct DerivedMesh *dynamicPaint_Modifier_apply(DynamicPaintModifierData *pmd, Scene *scene, Object *ob, DerivedMesh *dm) +{ + DerivedMesh *result = CDDM_copy(dm); + + if(pmd->canvas && !(pmd->canvas->flags & MOD_DPAINT_BAKING)) { + + DynamicPaintSurface *surface = pmd->canvas->surfaces.first; + pmd->canvas->flags &= ~MOD_DPAINT_PREVIEW_READY; + + /* loop through surfaces */ + for (; surface; surface=surface->next) { + PaintSurfaceData *sData = surface->data; + + if (surface && surface->format != MOD_DPAINT_SURFACE_F_IMAGESEQ && sData) { + if (!(surface->flags & (MOD_DPAINT_ACTIVE))) continue; + + /* process vertex surface previews */ + if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) { + + /* vertex color paint */ + if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) { + + MFace *mface = result->getFaceArray(result); + int numOfFaces = result->getNumFaces(result); + int i; + PaintPoint* pPoint = (PaintPoint*)sData->type_data; + MCol *col; + + /* paint is stored on dry and wet layers, so mix final color first */ + float *fcolor = MEM_callocN(sizeof(float)*sData->total_points*4, "Temp paint color"); + + #pragma omp parallel for schedule(static) + for (i=0; i<sData->total_points; i++) { + /* blend dry and wet layer */ + blendColors(pPoint[i].color, pPoint[i].alpha, pPoint[i].e_color, pPoint[i].e_alpha, &fcolor[i*4]); + } + + /* viewport preview */ + if (surface->flags & MOD_DPAINT_PREVIEW) { + /* Save preview results to weight layer, to be + * able to share same drawing methods */ + col = result->getFaceDataArray(result, CD_WEIGHT_MCOL); + if (!col) col = CustomData_add_layer(&result->faceData, CD_WEIGHT_MCOL, CD_CALLOC, NULL, numOfFaces); + + if (col) { + #pragma omp parallel for schedule(static) + for (i=0; i<numOfFaces; i++) { + int j=0; + Material *material = give_current_material(ob, mface[i].mat_nr+1); + + for (; j<((mface[i].v4)?4:3); j++) { + int index = (j==0)?mface[i].v1: (j==1)?mface[i].v2: (j==2)?mface[i].v3: mface[i].v4; + + if (surface->preview_id == MOD_DPAINT_SURFACE_PREV_PAINT) { + float c[3]; + index *= 4; + + /* Apply material color as base vertex color for preview */ + col[i*4+j].a = 255; + if (material) { + c[0] = material->r; + c[1] = material->g; + c[2] = material->b; + } + else { /* default grey */ + c[0] = 0.65f; + c[1] = 0.65f; + c[2] = 0.65f; + } + /* mix surface color */ + interp_v3_v3v3(c, c, &fcolor[index], fcolor[index+3]); + + col[i*4+j].r = FTOCHAR(c[2]); + col[i*4+j].g = FTOCHAR(c[1]); + col[i*4+j].b = FTOCHAR(c[0]); + } + else { + col[i*4+j].a = 255; + col[i*4+j].r = FTOCHAR(pPoint[index].wetness); + col[i*4+j].g = FTOCHAR(pPoint[index].wetness); + col[i*4+j].b = FTOCHAR(pPoint[index].wetness); + } + } + } + pmd->canvas->flags |= MOD_DPAINT_PREVIEW_READY; + } + } + + + /* save layer data to output layer */ + + /* paint layer */ + col = CustomData_get_layer_named(&result->faceData, CD_MCOL, surface->output_name); + if (col) { + #pragma omp parallel for schedule(static) + for (i=0; i<numOfFaces; i++) { + int j=0; + for (; j<((mface[i].v4)?4:3); j++) { + int index = (j==0)?mface[i].v1: (j==1)?mface[i].v2: (j==2)?mface[i].v3: mface[i].v4; + index *= 4; + + col[i*4+j].a = FTOCHAR(fcolor[index+3]); + col[i*4+j].r = FTOCHAR(fcolor[index+2]); + col[i*4+j].g = FTOCHAR(fcolor[index+1]); + col[i*4+j].b = FTOCHAR(fcolor[index]); + } + } + } + + MEM_freeN(fcolor); + + /* wet layer */ + col = CustomData_get_layer_named(&result->faceData, CD_MCOL, surface->output_name2); + if (col) { + #pragma omp parallel for schedule(static) + for (i=0; i<numOfFaces; i++) { + int j=0; + + for (; j<((mface[i].v4)?4:3); j++) { + int index = (j==0)?mface[i].v1: (j==1)?mface[i].v2: (j==2)?mface[i].v3: mface[i].v4; + col[i*4+j].a = 255; + col[i*4+j].r = FTOCHAR(pPoint[index].wetness); + col[i*4+j].g = FTOCHAR(pPoint[index].wetness); + col[i*4+j].b = FTOCHAR(pPoint[index].wetness); + } + } + } + } + /* vertex group paint */ + else if (surface->type == MOD_DPAINT_SURFACE_T_WEIGHT) { + int defgrp_index = defgroup_name_index(ob, surface->output_name); + MDeformVert *dvert = result->getVertDataArray(result, CD_MDEFORMVERT); + float *weight = (float*)sData->type_data; + /* viewport preview */ + if (surface->flags & MOD_DPAINT_PREVIEW) { + /* Save preview results to weight layer, to be + * able to share same drawing methods */ + MFace *mface = result->getFaceArray(result); + int numOfFaces = result->getNumFaces(result); + int i; + MCol *col = result->getFaceDataArray(result, CD_WEIGHT_MCOL); + if (!col) col = CustomData_add_layer(&result->faceData, CD_WEIGHT_MCOL, CD_CALLOC, NULL, numOfFaces); + + if (col) { + #pragma omp parallel for schedule(static) + for (i=0; i<numOfFaces; i++) { + float temp_color[3]; + int j=0; + for (; j<((mface[i].v4)?4:3); j++) { + int index = (j==0)?mface[i].v1: (j==1)?mface[i].v2: (j==2)?mface[i].v3: mface[i].v4; + + weight_to_rgb(weight[index], temp_color, temp_color+1, temp_color+2); + col[i*4+j].r = FTOCHAR(temp_color[2]); + col[i*4+j].g = FTOCHAR(temp_color[1]); + col[i*4+j].b = FTOCHAR(temp_color[0]); + col[i*4+j].a = 255; + } + } + pmd->canvas->flags |= MOD_DPAINT_PREVIEW_READY; + } + } + + /* apply weights into a vertex group, if doesnt exists add a new layer */ + if (defgrp_index >= 0 && !dvert && strlen(surface->output_name)>0) + dvert = CustomData_add_layer_named(&result->vertData, CD_MDEFORMVERT, CD_CALLOC, + NULL, sData->total_points, surface->output_name); + if (defgrp_index >= 0 && dvert) { + int i; + for(i=0; i<sData->total_points; i++) { + MDeformVert *dv= &dvert[i]; + MDeformWeight *def_weight = defvert_find_index(dv, defgrp_index); + + /* skip if weight value is 0 and no existing weight is found */ + if (!def_weight && !weight[i]) + continue; + + /* if not found, add a weight for it */ + if (!def_weight) { + MDeformWeight *newdw = MEM_callocN(sizeof(MDeformWeight)*(dv->totweight+1), + "deformWeight"); + if(dv->dw){ + memcpy(newdw, dv->dw, sizeof(MDeformWeight)*dv->totweight); + MEM_freeN(dv->dw); + } + dv->dw=newdw; + dv->dw[dv->totweight].def_nr=defgrp_index; + def_weight = &dv->dw[dv->totweight]; + dv->totweight++; + } + + /* set weight value */ + def_weight->weight = weight[i]; + } + } + } + /* wave simulation */ + else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) { + MVert *mvert = result->getVertArray(result); + int i; + PaintWavePoint* wPoint = (PaintWavePoint*)sData->type_data; + + #pragma omp parallel for schedule(static) + for (i=0; i<sData->total_points; i++) { + float normal[3]; + normal_short_to_float_v3(normal, mvert[i].no); + normalize_v3(normal); + + mvert[i].co[0] += normal[0]*wPoint[i].height; + mvert[i].co[1] += normal[1]*wPoint[i].height; + mvert[i].co[2] += normal[2]*wPoint[i].height; + } + CDDM_calc_normals(result); + } + + /* displace */ + dynamicPaint_applySurfaceDisplace(surface, result, 1); + } + } + } + } + /* make a copy of dm to use as brush data */ + if (pmd->brush) { + if (pmd->brush->dm) pmd->brush->dm->release(pmd->brush->dm); + pmd->brush->dm = CDDM_copy(result); + } + + return result; +} + +/* update cache frame range */ +void dynamicPaint_cacheUpdateFrames(DynamicPaintSurface *surface) +{ + if (surface->pointcache) { + surface->pointcache->startframe = surface->start_frame; + surface->pointcache->endframe = surface->end_frame; + } +} + +void canvas_copyDerivedMesh(DynamicPaintCanvasSettings *canvas, DerivedMesh *dm) +{ + if (canvas->dm) canvas->dm->release(canvas->dm); + canvas->dm = CDDM_copy(dm); +} + +/* +* Updates derived mesh copy and processes dynamic paint step / caches. +*/ +static void dynamicPaint_frameUpdate(DynamicPaintModifierData *pmd, Scene *scene, Object *ob, DerivedMesh *dm) +{ + if(pmd->canvas) { + DynamicPaintCanvasSettings *canvas = pmd->canvas; + DynamicPaintSurface *surface = canvas->surfaces.first; + + /* update derived mesh copy */ + canvas_copyDerivedMesh(canvas, dm); + + /* in case image sequence baking, stop here */ + if (canvas->flags & MOD_DPAINT_BAKING) return; + + /* loop through surfaces */ + for (; surface; surface=surface->next) { + int current_frame = (int)scene->r.cfra; + + /* free bake data if not required anymore */ + surface_freeUnusedData(surface); + + /* image sequences are handled by bake operator */ + if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) continue; + if (!(surface->flags & MOD_DPAINT_ACTIVE)) continue; + + /* make sure surface is valid */ + dynamicPaint_checkSurfaceData(surface); + + /* limit frame range */ + CLAMP(current_frame, surface->start_frame, surface->end_frame); + + if (current_frame != surface->current_frame || (int)scene->r.cfra == surface->start_frame) { + PointCache *cache = surface->pointcache; + PTCacheID pid; + surface->current_frame = current_frame; + + /* read point cache */ + BKE_ptcache_id_from_dynamicpaint(&pid, ob, surface); + pid.cache->startframe = surface->start_frame; + pid.cache->endframe = surface->end_frame; + BKE_ptcache_id_time(&pid, scene, scene->r.cfra, NULL, NULL, NULL); + + /* reset non-baked cache at first frame */ + if((int)scene->r.cfra == surface->start_frame && !(cache->flag & PTCACHE_BAKED)) + { + cache->flag |= PTCACHE_REDO_NEEDED; + BKE_ptcache_id_reset(scene, &pid, PTCACHE_RESET_OUTDATED); + cache->flag &= ~PTCACHE_REDO_NEEDED; + } + + /* try to read from cache */ + if(BKE_ptcache_read(&pid, (float)scene->r.cfra)) { + BKE_ptcache_validate(cache, (int)scene->r.cfra); + } + /* if read failed and we're on surface range do recalculate */ + else if ((int)scene->r.cfra == current_frame + && !(cache->flag & PTCACHE_BAKED)) { + /* calculate surface frame */ + canvas->flags |= MOD_DPAINT_BAKING; + dynamicPaint_calculateFrame(surface, scene, ob, current_frame); + canvas->flags &= ~MOD_DPAINT_BAKING; + + /* restore canvas derivedmesh if required */ + if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE && + surface->flags & MOD_DPAINT_DISP_INCREMENTAL && surface->next) + canvas_copyDerivedMesh(canvas, dm); + + BKE_ptcache_validate(cache, surface->current_frame); + BKE_ptcache_write(&pid, surface->current_frame); + } + } + } + } +} + +/* Modifier call. Processes dynamic paint modifier step. */ +struct DerivedMesh *dynamicPaint_Modifier_do(DynamicPaintModifierData *pmd, Scene *scene, Object *ob, DerivedMesh *dm) +{ + /* Update canvas data for a new frame */ + dynamicPaint_frameUpdate(pmd, scene, ob, dm); + + /* Return output mesh */ + return dynamicPaint_Modifier_apply(pmd, scene, ob, dm); +} + + +/***************************** Image Sequence / UV Image Surface Calls ******************************/ + +/* +* Tries to find the neighbouring pixel in given (uv space) direction. +* Result is used by effect system to move paint on the surface. +* +* px,py : origin pixel x and y +* n_index : lookup direction index (use neighX,neighY to get final index) +*/ +static int dynamicPaint_findNeighbourPixel(PaintUVPoint *tempPoints, DerivedMesh *dm, char *uvname, int w, int h, int px, int py, int n_index) +{ + /* Note: Current method only uses polygon edges to detect neighbouring pixels. + * -> It doesn't always lead to the optimum pixel but is accurate enough + * and faster/simplier than including possible face tip point links) + */ + + int x,y; + PaintUVPoint *tPoint = NULL; + PaintUVPoint *cPoint = NULL; + + /* shift position by given n_index */ + x = px + neighX[n_index]; + y = py + neighY[n_index]; + + if (x<0 || x>=w) return -1; + if (y<0 || y>=h) return -1; + + tPoint = &tempPoints[x+w*y]; /* UV neighbour */ + cPoint = &tempPoints[px+w*py]; /* Origin point */ + + /* + * Check if shifted point is on same face -> it's a correct neighbour + * (and if it isn't marked as an "edge pixel") + */ + if ((tPoint->face_index == cPoint->face_index) && (tPoint->neighbour_pixel == -1)) + return (x+w*y); + + /* + * Even if shifted point is on another face + * -> use this point. + * + * !! Replace with "is uv faces linked" check !! + * This should work fine as long as uv island + * margin is > 1 pixel. + */ + if ((tPoint->face_index != -1) && (tPoint->neighbour_pixel == -1)) { + return (x+w*y); + } + + /* + * If we get here, the actual neighbouring pixel + * is located on a non-linked uv face, and we have to find + * it's "real" position. + * + * Simple neighbouring face finding algorithm: + * - find closest uv edge to shifted pixel and get + * the another face that shares that edge + * - find corresponding position of that new face edge + * in uv space + * + * TODO: Implement something more accurate / optimized? + */ + { + int numOfFaces = dm->getNumFaces(dm); + MFace *mface = dm->getFaceArray(dm); + MTFace *tface = CustomData_get_layer_named(&dm->faceData, CD_MTFACE, uvname); + + /* Get closest edge to that subpixel on UV map */ + { + float pixel[2], dist, t_dist; + int i, uindex[2], edge1_index, edge2_index, + e1_index, e2_index, target_face; + float closest_point[2], lambda, dir_vec[2]; + int target_uv1, target_uv2, final_pixel[2], final_index; + + float *s_uv1, *s_uv2, *t_uv1, *t_uv2; + + pixel[0] = ((float)(px + neighX[n_index]) + 0.5f) / (float)w; + pixel[1] = ((float)(py + neighY[n_index]) + 0.5f) / (float)h; + + /* Get uv indexes for current face part */ + if (cPoint->quad) { + uindex[0] = 0; uindex[1] = 2; uindex[2] = 3; + } + else { + uindex[0] = 0; uindex[1] = 1; uindex[2] = 2; + } + + /* + * Find closest edge to that pixel + */ + /* Dist to first edge */ + e1_index = cPoint->v1; e2_index = cPoint->v2; edge1_index = uindex[0]; edge2_index = uindex[1]; + dist = dist_to_line_segment_v2(pixel, tface[cPoint->face_index].uv[edge1_index], tface[cPoint->face_index].uv[edge2_index]); + + /* Dist to second edge */ + t_dist = dist_to_line_segment_v2(pixel, tface[cPoint->face_index].uv[uindex[1]], tface[cPoint->face_index].uv[uindex[2]]); + if (t_dist < dist) {e1_index = cPoint->v2; e2_index = cPoint->v3; edge1_index = uindex[1]; edge2_index = uindex[2]; dist = t_dist;} + + /* Dist to third edge */ + t_dist = dist_to_line_segment_v2(pixel, tface[cPoint->face_index].uv[uindex[2]], tface[cPoint->face_index].uv[uindex[0]]); + if (t_dist < dist) {e1_index = cPoint->v3; e2_index = cPoint->v1; edge1_index = uindex[2]; edge2_index = uindex[0]; dist = t_dist;} + + + /* + * Now find another face that is linked to that edge + */ + target_face = -1; + + for (i=0; i<numOfFaces; i++) { + /* + * Check if both edge vertices share this face + */ + int v4 = (mface[i].v4) ? mface[i].v4 : -1; + + if ((e1_index == mface[i].v1 || e1_index == mface[i].v2 || e1_index == mface[i].v3 || e1_index == v4) && + (e2_index == mface[i].v1 || e2_index == mface[i].v2 || e2_index == mface[i].v3 || e2_index == v4)) { + if (i == cPoint->face_index) continue; + + target_face = i; + + /* + * Get edge UV index + */ + if (e1_index == mface[i].v1) target_uv1 = 0; + else if (e1_index == mface[i].v2) target_uv1 = 1; + else if (e1_index == mface[i].v3) target_uv1 = 2; + else target_uv1 = 3; + + if (e2_index == mface[i].v1) target_uv2 = 0; + else if (e2_index == mface[i].v2) target_uv2 = 1; + else if (e2_index == mface[i].v3) target_uv2 = 2; + else target_uv2 = 3; + + break; + } + } + + /* If none found return -1 */ + if (target_face == -1) return -1; + + /* + * If target face is connected in UV space as well, just use original index + */ + s_uv1 = (float *)tface[cPoint->face_index].uv[edge1_index]; + s_uv2 = (float *)tface[cPoint->face_index].uv[edge2_index]; + t_uv1 = (float *)tface[target_face].uv[target_uv1]; + t_uv2 = (float *)tface[target_face].uv[target_uv2]; + + //printf("connected UV : %f,%f & %f,%f - %f,%f & %f,%f\n", s_uv1[0], s_uv1[1], s_uv2[0], s_uv2[1], t_uv1[0], t_uv1[1], t_uv2[0], t_uv2[1]); + + if (((s_uv1[0] == t_uv1[0] && s_uv1[1] == t_uv1[1]) && + (s_uv2[0] == t_uv2[0] && s_uv2[1] == t_uv2[1]) ) || + ((s_uv2[0] == t_uv1[0] && s_uv2[1] == t_uv1[1]) && + (s_uv1[0] == t_uv2[0] && s_uv1[1] == t_uv2[1]) )) return ((px+neighX[n_index]) + w*(py+neighY[n_index])); + + /* + * Find a point that is relatively at same edge position + * on this other face UV + */ + lambda = closest_to_line_v2(closest_point, pixel, tface[cPoint->face_index].uv[edge1_index], tface[cPoint->face_index].uv[edge2_index]); + if (lambda < 0.0f) lambda = 0.0f; + if (lambda > 1.0f) lambda = 1.0f; + + sub_v2_v2v2(dir_vec, tface[target_face].uv[target_uv2], tface[target_face].uv[target_uv1]); + + mul_v2_fl(dir_vec, lambda); + + copy_v2_v2(pixel, tface[target_face].uv[target_uv1]); + add_v2_v2(pixel, dir_vec); + pixel[0] = (pixel[0] * (float)w) - 0.5f; + pixel[1] = (pixel[1] * (float)h) - 0.5f; + + final_pixel[0] = (int)floor(pixel[0]); + final_pixel[1] = (int)floor(pixel[1]); + + /* If current pixel uv is outside of texture */ + if (final_pixel[0] < 0 || final_pixel[0] >= w) return -1; + if (final_pixel[1] < 0 || final_pixel[1] >= h) return -1; + + final_index = final_pixel[0] + w * final_pixel[1]; + + /* If we ended up to our origin point ( mesh has smaller than pixel sized faces) */ + if (final_index == (px+w*py)) return -1; + /* If found pixel still lies on wrong face ( mesh has smaller than pixel sized faces) */ + if (tempPoints[final_index].face_index != target_face) return -1; + + /* + * If final point is an "edge pixel", use it's "real" neighbour instead + */ + if (tempPoints[final_index].neighbour_pixel != -1) final_index = cPoint->neighbour_pixel; + + return final_index; + } + } +} + +/* +* Create a surface for uv image sequence format +*/ +int dynamicPaint_createUVSurface(DynamicPaintSurface *surface) +{ + /* Antialias jitter point relative coords */ + float jitter5sample[10] = {0.0f, 0.0f, + -0.2f, -0.4f, + 0.2f, 0.4f, + 0.4f, -0.2f, + -0.4f, 0.3f}; + int ty; + int w,h; + int numOfFaces; + char uvname[32]; + int active_points = 0; + int error = 0; + + PaintSurfaceData *sData; + DynamicPaintCanvasSettings *canvas = surface->canvas; + DerivedMesh *dm = canvas->dm; + + PaintUVPoint *tempPoints = NULL; + Vec3f *tempWeights = NULL; + MVert *mvert = NULL; + MFace *mface = NULL; + MTFace *tface = NULL; + Bounds2D *faceBB = NULL; + int *final_index; + int aa_samples; + + if (!dm) return setError(canvas, "Canvas mesh not updated."); + if (surface->format != MOD_DPAINT_SURFACE_F_IMAGESEQ) return setError(canvas, "Can't bake non-\"image sequence\" formats."); + + numOfFaces = dm->getNumFaces(dm); + mvert = dm->getVertArray(dm); + mface = dm->getFaceArray(dm); + + /* get uv layer */ + CustomData_validate_layer_name(&dm->faceData, CD_MTFACE, surface->uvlayer_name, uvname); + tface = CustomData_get_layer_named(&dm->faceData, CD_MTFACE, uvname); + + /* Check for validity */ + if (!tface) return setError(canvas, "No UV data on canvas."); + if (surface->image_resolution < 16 || surface->image_resolution > 8192) return setError(canvas, "Invalid resolution."); + + w = h = surface->image_resolution; + + /* + * Start generating the surface + */ + printf("DynamicPaint: Preparing UV surface of %ix%i pixels and %i faces.\n", w, h, numOfFaces); + + /* Init data struct */ + if (surface->data) dynamicPaint_freeSurfaceData(surface); + sData = surface->data = MEM_callocN(sizeof(PaintSurfaceData), "PaintSurfaceData"); + if (!surface->data) return setError(canvas, "Not enough free memory."); + + aa_samples = (surface->flags & MOD_DPAINT_ANTIALIAS) ? 5 : 1; + tempPoints = (struct PaintUVPoint *) MEM_callocN(w*h*sizeof(struct PaintUVPoint), "Temp PaintUVPoint"); + if (!tempPoints) error=1; + + final_index = (int *) MEM_callocN(w*h*sizeof(int), "Temp UV Final Indexes"); + if (!final_index) error=1; + + tempWeights = (struct Vec3f *) MEM_mallocN(w*h*aa_samples*sizeof(struct Vec3f), "Temp bWeights"); + if (!tempWeights) error=1; + + /* + * Generate a temporary bounding box array for UV faces to optimize + * the pixel-inside-a-face search. + */ + if (!error) { + faceBB = (struct Bounds2D *) MEM_mallocN(numOfFaces*sizeof(struct Bounds2D), "MPCanvasFaceBB"); + if (!faceBB) error=1; + } + + if (!error) + for (ty=0; ty<numOfFaces; ty++) { + int numOfVert = (mface[ty].v4) ? 4 : 3; + int i; + + copy_v2_v2(faceBB[ty].min, tface[ty].uv[0]); + copy_v2_v2(faceBB[ty].max, tface[ty].uv[0]); + + for (i = 1; i<numOfVert; i++) { + if (tface[ty].uv[i][0] < faceBB[ty].min[0]) faceBB[ty].min[0] = tface[ty].uv[i][0]; + if (tface[ty].uv[i][1] < faceBB[ty].min[1]) faceBB[ty].min[1] = tface[ty].uv[i][1]; + if (tface[ty].uv[i][0] > faceBB[ty].max[0]) faceBB[ty].max[0] = tface[ty].uv[i][0]; + if (tface[ty].uv[i][1] > faceBB[ty].max[1]) faceBB[ty].max[1] = tface[ty].uv[i][1]; + + } + } + + /* + * Loop through every pixel and check + * if pixel is uv-mapped on a canvas face. + */ + if (!error) { + #pragma omp parallel for schedule(static) + for (ty = 0; ty < h; ty++) + { + int tx; + for (tx = 0; tx < w; tx++) + { + int i, sample; + int index = tx+w*ty; + PaintUVPoint *tPoint = (&tempPoints[index]); + + short isInside = 0; /* if point is inside a uv face */ + + float d1[2], d2[2], d3[2], point[5][2]; + float dot00,dot01,dot02,dot11,dot12, invDenom, u,v; + + /* Init per pixel settings */ + tPoint->face_index = -1; + tPoint->neighbour_pixel = -1; + tPoint->pixel_index = index; + + /* Actual pixel center, used when collision is found */ + point[0][0] = ((float)tx + 0.5f) / w; + point[0][1] = ((float)ty + 0.5f) / h; + + /* + * A pixel middle sample isn't enough to find very narrow polygons + * So using 4 samples of each corner too + */ + point[1][0] = ((float)tx) / w; + point[1][1] = ((float)ty) / h; + + point[2][0] = ((float)tx+1) / w; + point[2][1] = ((float)ty) / h; + + point[3][0] = ((float)tx) / w; + point[3][1] = ((float)ty+1) / h; + + point[4][0] = ((float)tx+1) / w; + point[4][1] = ((float)ty+1) / h; + + + /* Loop through samples, starting from middle point */ + for (sample=0; sample<5; sample++) { + + /* Loop through every face in the mesh */ + for (i=0; i<numOfFaces; i++) { + + /* Check uv bb */ + if (faceBB[i].min[0] > (point[sample][0])) continue; + if (faceBB[i].min[1] > (point[sample][1])) continue; + if (faceBB[i].max[0] < (point[sample][0])) continue; + if (faceBB[i].max[1] < (point[sample][1])) continue; + + /* Calculate point inside a triangle check + * for uv0,1,2 */ + sub_v2_v2v2(d1, tface[i].uv[2], tface[i].uv[0]); // uv2 - uv0 + sub_v2_v2v2(d2, tface[i].uv[1], tface[i].uv[0]); // uv1 - uv0 + sub_v2_v2v2(d3, point[sample], tface[i].uv[0]); // point - uv0 + + dot00 = d1[0]*d1[0] + d1[1]*d1[1]; + dot01 = d1[0]*d2[0] + d1[1]*d2[1]; + dot02 = d1[0]*d3[0] + d1[1]*d3[1]; + dot11 = d2[0]*d2[0] + d2[1]*d2[1]; + dot12 = d2[0]*d3[0] + d2[1]*d3[1]; + + invDenom = 1 / (dot00 * dot11 - dot01 * dot01); + u = (dot11 * dot02 - dot01 * dot12) * invDenom; + v = (dot00 * dot12 - dot01 * dot02) * invDenom; + + if ((u > 0) && (v > 0) && (u + v < 1)) {isInside=1;} /* is inside a triangle */ + + /* If collision wasn't found but the face is a quad + * do another check for the second half */ + if ((!isInside) && mface[i].v4) + { + + /* change d2 to test the other half */ + sub_v2_v2v2(d2, tface[i].uv[3], tface[i].uv[0]); // uv3 - uv0 + + /* test again */ + dot00 = d1[0]*d1[0] + d1[1]*d1[1]; + dot01 = d1[0]*d2[0] + d1[1]*d2[1]; + dot02 = d1[0]*d3[0] + d1[1]*d3[1]; + dot11 = d2[0]*d2[0] + d2[1]*d2[1]; + dot12 = d2[0]*d3[0] + d2[1]*d3[1]; + + invDenom = 1 / (dot00 * dot11 - dot01 * dot01); + u = (dot11 * dot02 - dot01 * dot12) * invDenom; + v = (dot00 * dot12 - dot01 * dot02) * invDenom; + + if ((u > 0) && (v > 0) && (u + v < 1)) {isInside=2;} /* is inside the second half of the quad */ + + } + + /* + * If point was inside the face + */ + if (isInside != 0) { + + float uv1co[2], uv2co[2], uv3co[2], uv[2]; + int j; + + /* Get triagnle uvs */ + if (isInside==1) { + copy_v2_v2(uv1co, tface[i].uv[0]); + copy_v2_v2(uv2co, tface[i].uv[1]); + copy_v2_v2(uv3co, tface[i].uv[2]); + } + else { + copy_v2_v2(uv1co, tface[i].uv[0]); + copy_v2_v2(uv2co, tface[i].uv[2]); + copy_v2_v2(uv3co, tface[i].uv[3]); + } + + /* Add b-weights per anti-aliasing sample */ + for (j=0; j<aa_samples; j++) { + uv[0] = point[0][0] + jitter5sample[j*2] / w; + uv[1] = point[0][1] + jitter5sample[j*2+1] / h; + + barycentric_weights_v2(uv1co, uv2co, uv3co, uv, tempWeights[index*aa_samples+j].v); + } + + /* Set surface point face values */ + tPoint->face_index = i; /* face index */ + tPoint->quad = (isInside == 2) ? 1 : 0; /* quad or tri part*/ + + /* save vertex indexes */ + tPoint->v1 = (isInside == 2) ? mface[i].v1 : mface[i].v1; + tPoint->v2 = (isInside == 2) ? mface[i].v3 : mface[i].v2; + tPoint->v3 = (isInside == 2) ? mface[i].v4 : mface[i].v3; + + sample = 5; /* make sure we exit sample loop as well */ + break; + } + } + } /* sample loop */ + } + } + + /* + * Now loop through every pixel that was left without index + * and find if they have neighbouring pixels that have an index. + * If so use that polygon as pixel surface. + * (To avoid seams on uv island edges) + */ + #pragma omp parallel for schedule(static) + for (ty = 0; ty < h; ty++) + { + int tx; + for (tx = 0; tx < w; tx++) + { + int index = tx+w*ty; + PaintUVPoint *tPoint = (&tempPoints[index]); + + /* If point isnt't on canvas mesh */ + if (tPoint->face_index == -1) { + int u_min, u_max, v_min, v_max; + int u,v, ind; + float point[2]; + + /* get loop area */ + u_min = (tx > 0) ? -1 : 0; + u_max = (tx < (w-1)) ? 1 : 0; + v_min = (ty > 0) ? -1 : 0; + v_max = (ty < (h-1)) ? 1 : 0; + + point[0] = ((float)tx + 0.5f) / w; + point[1] = ((float)ty + 0.5f) / h; + + /* search through defined area for neighbour */ + for (u=u_min; u<=u_max; u++) + for (v=v_min; v<=v_max; v++) { + /* if not this pixel itself */ + if (u!=0 || v!=0) { + ind = (tx+u)+w*(ty+v); + + /* if neighbour has index */ + if (tempPoints[ind].face_index != -1) { + + float uv1co[2], uv2co[2], uv3co[2], uv[2]; + int i = tempPoints[ind].face_index, j; + + /* Now calculate pixel data for this pixel as it was on polygon surface */ + if (!tempPoints[ind].quad) { + copy_v2_v2(uv1co, tface[i].uv[0]); + copy_v2_v2(uv2co, tface[i].uv[1]); + copy_v2_v2(uv3co, tface[i].uv[2]); + } + else { + copy_v2_v2(uv1co, tface[i].uv[0]); + copy_v2_v2(uv2co, tface[i].uv[2]); + copy_v2_v2(uv3co, tface[i].uv[3]); + } + + /* Add b-weights per anti-aliasing sample */ + for (j=0; j<aa_samples; j++) { + + uv[0] = point[0] + jitter5sample[j*2] / w; + uv[1] = point[1] + jitter5sample[j*2+1] / h; + barycentric_weights_v2(uv1co, uv2co, uv3co, uv, tempWeights[index*aa_samples+j].v); + } + + /* Set values */ + tPoint->neighbour_pixel = ind; // face index + tPoint->quad = tempPoints[ind].quad; // quad or tri + + /* save vertex indexes */ + tPoint->v1 = (tPoint->quad) ? mface[i].v1 : mface[i].v1; + tPoint->v2 = (tPoint->quad) ? mface[i].v3 : mface[i].v2; + tPoint->v3 = (tPoint->quad) ? mface[i].v4 : mface[i].v3; + + u = u_max + 1; /* make sure we exit outer loop as well */ + break; + } + } + } + } + } + } + + /* + * When base loop is over convert found neighbour indexes to real ones + * Also count the final number of active surface points + */ + for (ty = 0; ty < h; ty++) + { + int tx; + for (tx = 0; tx < w; tx++) + { + int index = tx+w*ty; + PaintUVPoint *tPoint = (&tempPoints[index]); + + if (tPoint->face_index == -1 && tPoint->neighbour_pixel != -1) tPoint->face_index = tempPoints[tPoint->neighbour_pixel].face_index; + if (tPoint->face_index != -1) active_points++; + } + } + + /* If any effect enabled, create surface effect / wet layer + * neighbour lists. Processes possibly moving data. */ + if (surface_usesAdjData(surface)) { + + int i, cursor=0; + + /* Create a temporary array of final indexes (before unassigned + * pixels have been dropped) */ + for (i=0; i<w*h; i++) { + if (tempPoints[i].face_index != -1) { + final_index[i] = cursor; + cursor++; + } + } + /* allocate memory */ + sData->total_points = w*h; + dynamicPaint_initAdjacencyData(surface, 0); + + if (sData->adj_data) { + PaintAdjData *ed = sData->adj_data; + unsigned int n_pos = 0; + //#pragma omp parallel for schedule(static) + for (ty = 0; ty < h; ty++) + { + int tx; + for (tx = 0; tx < w; tx++) + { + int i, index = tx+w*ty; + + if (tempPoints[index].face_index != -1) { + ed->n_index[final_index[index]] = n_pos; + ed->n_num[final_index[index]] = 0; + + for (i=0; i<8; i++) { + + /* Try to find a neighbouring pixel in defined direction + * If not found, -1 is returned */ + int n_target = dynamicPaint_findNeighbourPixel(tempPoints, dm, uvname, w, h, tx, ty, i); + + if (n_target != -1) { + ed->n_target[n_pos] = final_index[n_target]; + ed->n_num[final_index[index]]++; + n_pos++; + } + } + } + } + } + } + } + + /* Create final surface data without inactive points */ + { + ImgSeqFormatData *f_data = MEM_callocN(sizeof(struct ImgSeqFormatData), "ImgSeqFormatData"); + if (f_data) { + f_data->uv_p = MEM_callocN(active_points*sizeof(struct PaintUVPoint), "PaintUVPoint"); + f_data->barycentricWeights = MEM_callocN(active_points*aa_samples*sizeof(struct Vec3f), "PaintUVPoint"); + + if (!f_data->uv_p || !f_data->barycentricWeights) error=1; + } + else error=1; + + sData->total_points = active_points; + + /* in case of allocation error, free everything */ + if (error) { + if (f_data) { + if (f_data->uv_p) MEM_freeN(f_data->uv_p); + if (f_data->barycentricWeights) MEM_freeN(f_data->barycentricWeights); + MEM_freeN(f_data); + } + } + else { + int index, cursor = 0; + sData->total_points = active_points; + sData->format_data = f_data; + + for(index = 0; index < (w*h); index++) { + if (tempPoints[index].face_index != -1) { + memcpy(&f_data->uv_p[cursor], &tempPoints[index], sizeof(PaintUVPoint)); + memcpy(&f_data->barycentricWeights[cursor*aa_samples], &tempWeights[index*aa_samples], sizeof(Vec3f)*aa_samples); + cursor++; + } + } + } + } + } + if (error==1) setError(canvas, "Not enough free memory."); + + if (faceBB) MEM_freeN(faceBB); + if (tempPoints) MEM_freeN(tempPoints); + if (tempWeights) MEM_freeN(tempWeights); + if (final_index) MEM_freeN(final_index); + + /* Init surface type data */ + if (!error) { + dynamicPaint_allocateSurfaceType(surface); + +#if 0 + /* ----------------------------------------------------------------- + * For debug, output pixel statuses to the color map + * -----------------------------------------------------------------*/ + #pragma omp parallel for schedule(static) + for (index = 0; index < sData->total_points; index++) + { + ImgSeqFormatData *f_data = (ImgSeqFormatData*)sData->format_data; + PaintUVPoint *uvPoint = &((PaintUVPoint*)f_data->uv_p)[index]; + PaintPoint *pPoint = &((PaintPoint*)sData->type_data)[index]; + pPoint->alpha=1.0f; + + /* Every pixel that is assigned as "edge pixel" gets blue color */ + if (uvPoint->neighbour_pixel != -1) pPoint->color[2] = 1.0f; + /* and every pixel that finally got an polygon gets red color */ + if (uvPoint->face_index != -1) pPoint->color[0] = 1.0f; + /* green color shows pixel face index hash */ + if (uvPoint->face_index != -1) pPoint->color[1] = (float)(uvPoint->face_index % 255)/256.0f; + } + +#endif + dynamicPaint_setInitialColor(surface); + } + + return (error == 0); +} + +/* +* Outputs an image file from uv surface data. +*/ +void dynamicPaint_outputSurfaceImage(DynamicPaintSurface *surface, char* filename, short output_layer) +{ + int index; + ImBuf* ibuf = NULL; + PaintSurfaceData *sData = surface->data; + ImgSeqFormatData *f_data = (ImgSeqFormatData*)sData->format_data; + /* OpenEXR or PNG */ + int format = (surface->image_fileformat & MOD_DPAINT_IMGFORMAT_OPENEXR) ? R_OPENEXR : R_PNG; + char output_file[FILE_MAX]; + + if (!sData || !sData->type_data) {setError(surface->canvas, "Image save failed: Invalid surface.");return;} + /* if selected format is openexr, but current build doesnt support one */ + #ifndef WITH_OPENEXR + if (format == R_OPENEXR) format = R_PNG; + #endif + BLI_strncpy(output_file, filename, sizeof(output_file)); + BKE_add_image_extension(output_file, format); + + /* Validate output file path */ + BLI_path_abs(output_file, G.main->name); + BLI_make_existing_file(output_file); + + /* Init image buffer */ + ibuf = IMB_allocImBuf(surface->image_resolution, surface->image_resolution, 32, IB_rectfloat); + if (ibuf == NULL) {setError(surface->canvas, "Image save failed: Not enough free memory.");return;} + + #pragma omp parallel for schedule(static) + for (index = 0; index < sData->total_points; index++) + { + int pos=f_data->uv_p[index].pixel_index*4; /* image buffer position */ + + /* Set values of preferred type */ + if (output_layer == 1) { + /* wetmap */ + if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) { + PaintPoint *point = &((PaintPoint*)sData->type_data)[index]; + float value = (point->wetness > 1.0f) ? 1.0f : point->wetness; + + ibuf->rect_float[pos]=value; + ibuf->rect_float[pos+1]=value; + ibuf->rect_float[pos+2]=value; + ibuf->rect_float[pos+3]=1.0f; + } + } + else if (output_layer == 0) { + /* Paintmap */ + if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) { + PaintPoint *point = &((PaintPoint*)sData->type_data)[index]; + + ibuf->rect_float[pos] = point->color[0]; + ibuf->rect_float[pos+1] = point->color[1]; + ibuf->rect_float[pos+2] = point->color[2]; + /* mix wet layer */ + if (point->e_alpha) mixColors(&ibuf->rect_float[pos], point->alpha, point->e_color, point->e_alpha); + + /* use highest alpha */ + ibuf->rect_float[pos+3] = (point->e_alpha > point->alpha) ? point->e_alpha : point->alpha; + + /* Multiply color by alpha if enabled */ + if (surface->flags & MOD_DPAINT_MULALPHA) { + ibuf->rect_float[pos] *= ibuf->rect_float[pos+3]; + ibuf->rect_float[pos+1] *= ibuf->rect_float[pos+3]; + ibuf->rect_float[pos+2] *= ibuf->rect_float[pos+3]; + } + } + /* displace */ + else if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE) { + float depth = ((float*)sData->type_data)[index]; + if (surface->depth_clamp) + depth /= surface->depth_clamp; + + if (surface->disp_type == MOD_DPAINT_DISP_DISPLACE) { + depth = (0.5f - depth/2.0f); + } + + CLAMP(depth, 0.0f, 1.0f); + + ibuf->rect_float[pos]=depth; + ibuf->rect_float[pos+1]=depth; + ibuf->rect_float[pos+2]=depth; + ibuf->rect_float[pos+3]=1.0f; + } + /* waves */ + else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) { + PaintWavePoint *wPoint = &((PaintWavePoint*)sData->type_data)[index]; + float depth = wPoint->height; + if (surface->depth_clamp) + depth /= surface->depth_clamp; + depth = (0.5f + depth/2.0f); + CLAMP(depth, 0.0f, 1.0f); + + ibuf->rect_float[pos]=depth; + ibuf->rect_float[pos+1]=depth; + ibuf->rect_float[pos+2]=depth; + ibuf->rect_float[pos+3]=1.0f; + } + } + } + + /* Set output format, png in case exr isnt supported */ + ibuf->ftype= PNG|95; +#ifdef WITH_OPENEXR + if (format == R_OPENEXR) { /* OpenEXR 32-bit float */ + ibuf->ftype = OPENEXR | OPENEXR_COMPRESS; + } +#endif + + /* Save image */ + IMB_saveiff(ibuf, output_file, IB_rectfloat); + IMB_freeImBuf(ibuf); +} + + +/***************************** Material / Texture Sampling ******************************/ + +/* stores a copy of required materials to allow doing adjustments +* without interfering the render/preview */ +typedef struct BrushMaterials { + Material *mat; + Material **ob_mats; + int tot; +} BrushMaterials; + +/* Initialize materials for brush object: +* Calculates inverse matrices for linked objects, updates +* volume caches etc. */ +static void dynamicPaint_updateBrushMaterials(Object *brushOb, Material *ui_mat, Scene *scene, BrushMaterials *bMats) +{ + /* Calculate inverse transformation matrix + * for this object */ + invert_m4_m4(brushOb->imat, brushOb->obmat); + copy_m4_m4(brushOb->imat_ren, brushOb->imat); + + /* Now process every material linked to this brush object */ + if ((ui_mat == NULL) && brushOb->mat && brushOb->totcol) { + int i, tot=(*give_totcolp(brushOb)); + + /* allocate material pointer array */ + if (tot) { + bMats->ob_mats = MEM_callocN(sizeof(Material*)*(tot), "BrushMaterials"); + for (i=0; i<tot; i++) { + bMats->ob_mats[i] = RE_init_sample_material(give_current_material(brushOb,(i+1)), scene); + } + } + bMats->tot = tot; + } + else { + bMats->mat = RE_init_sample_material(ui_mat, scene); + } +} + +/* free all data allocated by dynamicPaint_updateBrushMaterials() */ +static void dynamicPaint_freeBrushMaterials(BrushMaterials *bMats) +{ + /* Now process every material linked to this brush object */ + if (bMats->ob_mats) { + int i; + for (i=0; i<bMats->tot; i++) { + RE_free_sample_material(bMats->ob_mats[i]); + } + MEM_freeN(bMats->ob_mats); + } + else if (bMats->mat) { + RE_free_sample_material(bMats->mat); + } +} + +/* +* Get material diffuse color and alpha (including linked textures) in given coordinates +*/ +void dynamicPaint_doMaterialTex(BrushMaterials *bMats, float color[3], float *alpha, Object *brushOb, const float volume_co[3], const float surface_co[3], int faceIndex, short isQuad, DerivedMesh *orcoDm) +{ + Material *mat = bMats->mat; + MFace *mface = orcoDm->getFaceArray(orcoDm); + + /* If no material defined, use the one assigned to the mesh face */ + if (mat == NULL) { + if (bMats->ob_mats) { + int mat_nr = mface[faceIndex].mat_nr; + if (mat_nr >= (*give_totcolp(brushOb))) return; + mat = bMats->ob_mats[mat_nr]; + if (mat == NULL) return; /* No material assigned */ + } + else return; + } + + RE_sample_material_color(mat, color, alpha, volume_co, surface_co, faceIndex, isQuad, orcoDm, brushOb); +} + + +/***************************** Ray / Nearest Point Utils ******************************/ + + +/* A modified callback to bvh tree raycast. The tree must bust have been built using bvhtree_from_mesh_faces. +* userdata must be a BVHMeshCallbackUserdata built from the same mesh as the tree. +* +* To optimize brush detection speed this doesn't calculate hit coordinates or normal. +* If ray hit the second half of a quad, no[0] is set to 1.0f. +*/ +static void mesh_faces_spherecast_dp(void *userdata, int index, const BVHTreeRay *ray, BVHTreeRayHit *hit) +{ + const BVHTreeFromMesh *data = (BVHTreeFromMesh*) userdata; + MVert *vert = data->vert; + MFace *face = data->face + index; + short quad = 0; + + float *t0, *t1, *t2, *t3; + t0 = vert[ face->v1 ].co; + t1 = vert[ face->v2 ].co; + t2 = vert[ face->v3 ].co; + t3 = face->v4 ? vert[ face->v4].co : NULL; + + do + { + float dist = bvhtree_ray_tri_intersection(ray, hit->dist, t0, t1, t2); + + if(dist >= 0 && dist < hit->dist) + { + hit->index = index; + hit->dist = dist; + hit->no[0] = (quad) ? 1.0f : 0.0f; + } + + t1 = t2; + t2 = t3; + t3 = NULL; + quad = 1; + + } while(t2); +} + +/* A modified callback to bvh tree nearest point. The tree must bust have been built using bvhtree_from_mesh_faces. +* userdata must be a BVHMeshCallbackUserdata built from the same mesh as the tree. +* +* To optimize brush detection speed this doesn't calculate hit normal. +* If ray hit the second half of a quad, no[0] is set to 1.0f, else 0.0f +*/ +static void mesh_faces_nearest_point_dp(void *userdata, int index, const float *co, BVHTreeNearest *nearest) +{ + const BVHTreeFromMesh *data = (BVHTreeFromMesh*) userdata; + MVert *vert = data->vert; + MFace *face = data->face + index; + short quad = 0; + + float *t0, *t1, *t2, *t3; + t0 = vert[ face->v1 ].co; + t1 = vert[ face->v2 ].co; + t2 = vert[ face->v3 ].co; + t3 = face->v4 ? vert[ face->v4].co : NULL; + + do + { + float nearest_tmp[3], dist; + int vertex, edge; + + dist = nearest_point_in_tri_surface(t0, t1, t2, co, &vertex, &edge, nearest_tmp); + if(dist < nearest->dist) + { + nearest->index = index; + nearest->dist = dist; + copy_v3_v3(nearest->co, nearest_tmp); + nearest->no[0] = (quad) ? 1.0f : 0.0f; + } + + t1 = t2; + t2 = t3; + t3 = NULL; + quad = 1; + + } while(t2); +} + + +/***************************** Brush Painting Calls ******************************/ + +/* +* Mix color values to canvas point. +* +* surface : canvas surface +* index : surface point index +* paintFlags : paint object flags +* paintColor,Alpha,Wetness : to be mixed paint values +* timescale : value used to adjust time dependand +* operations when using substeps +*/ +static void dynamicPaint_mixPaintColors(DynamicPaintSurface *surface, int index, int paintFlags, float *paintColor, float *paintAlpha, float *paintWetness, float *timescale) +{ + PaintPoint *pPoint = &((PaintPoint*)surface->data->type_data)[index]; + + /* Add paint */ + if (!(paintFlags & MOD_DPAINT_ERASE)) { + float mix[4]; + float temp_alpha = (*paintAlpha) * ((paintFlags & MOD_DPAINT_ABS_ALPHA) ? 1.0f : (*timescale)); + + /* mix brush color with wet layer color */ + blendColors(pPoint->e_color, pPoint->e_alpha, paintColor, temp_alpha, mix); + copy_v3_v3(pPoint->e_color, mix); + + /* mix wetness and alpha depending on selected alpha mode */ + if (paintFlags & MOD_DPAINT_ABS_ALPHA) { + /* update values to the brush level unless theyre higher already */ + if (pPoint->e_alpha < (*paintAlpha)) pPoint->e_alpha = (*paintAlpha); + if (pPoint->wetness < (*paintWetness)) pPoint->wetness = (*paintWetness); + } + else { + float wetness = (*paintWetness); + CLAMP(wetness, 0.0f, 1.0f); + pPoint->e_alpha = mix[3]; + pPoint->wetness = pPoint->wetness*(1.0f-wetness) + wetness; + } + + if (pPoint->wetness<MIN_WETNESS) pPoint->wetness = MIN_WETNESS; + + pPoint->state = DPAINT_PAINT_NEW; + } + /* Erase paint */ + else { + float a_ratio, a_highest; + float wetness; + float invFact = 1.0f - (*paintAlpha); + + /* + * Make highest alpha to match erased value + * but maintain alpha ratio + */ + if (paintFlags & MOD_DPAINT_ABS_ALPHA) { + a_highest = (pPoint->e_alpha > pPoint->alpha) ? pPoint->e_alpha : pPoint->alpha; + if (a_highest > invFact) { + a_ratio = invFact / a_highest; + + pPoint->e_alpha *= a_ratio; + pPoint->alpha *= a_ratio; + } + } + else { + pPoint->e_alpha -= (*paintAlpha) * (*timescale); + if (pPoint->e_alpha < 0.0f) pPoint->e_alpha = 0.0f; + pPoint->alpha -= (*paintAlpha) * (*timescale); + if (pPoint->alpha < 0.0f) pPoint->alpha = 0.0f; + } + + wetness = (1.0f - (*paintWetness)) * pPoint->e_alpha; + if (pPoint->wetness > wetness) pPoint->wetness = wetness; + } +} + +/* applies given brush intersection value for wave surface */ +static void dynamicPaint_mixWaveHeight(PaintWavePoint *wPoint, DynamicPaintBrushSettings *brush, float isect_height) +{ + int hit = 0; + isect_height *= brush->wave_factor; + + /* determine hit depending on wave_factor */ + if (brush->wave_factor > 0.0f && wPoint->height > isect_height) + hit = 1; + else if (brush->wave_factor < 0.0f && wPoint->height < isect_height) + hit = 1; + + if (hit) { + if (brush->wave_type == MOD_DPAINT_WAVEB_DEPTH) { + wPoint->height = isect_height; + wPoint->state = DPAINT_WAVE_OBSTACLE; + wPoint->velocity = 0.0f; + } + else if (brush->wave_type == MOD_DPAINT_WAVEB_FORCE) + wPoint->velocity = isect_height; + else if (brush->wave_type == MOD_DPAINT_WAVEB_REFLECT) + wPoint->state = DPAINT_WAVE_REFLECT_ONLY; + } +} + +/* +* add brush results to the surface data depending on surface type +*/ +static void dynamicPaint_updatePointData(DynamicPaintSurface *surface, unsigned int index, DynamicPaintBrushSettings *brush, + float paint[3], float influence, float depth, float vel_factor, float timescale) +{ + PaintSurfaceData *sData = surface->data; + float strength = influence * brush->alpha; + CLAMP(strength, 0.0f, 1.0f); + + /* Sample velocity colorband if required */ + if (brush->flags & (MOD_DPAINT_VELOCITY_ALPHA|MOD_DPAINT_VELOCITY_COLOR|MOD_DPAINT_VELOCITY_DEPTH)) { + float coba_res[4]; + vel_factor /= brush->max_velocity; + CLAMP(vel_factor, 0.0f, 1.0f); + + if (do_colorband(brush->vel_ramp, vel_factor, coba_res)) { + if (brush->flags & MOD_DPAINT_VELOCITY_COLOR) { + paint[0] = coba_res[0]; + paint[1] = coba_res[1]; + paint[2] = coba_res[2]; + } + if (brush->flags & MOD_DPAINT_VELOCITY_ALPHA) + strength *= coba_res[3]; + if (brush->flags & MOD_DPAINT_VELOCITY_DEPTH) + depth *= coba_res[3]; + } + } + + /* mix paint surface */ + if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) { + + float paintWetness = brush->wetness * strength; + float paintAlpha = strength; + + dynamicPaint_mixPaintColors(surface, index, brush->flags, paint, &paintAlpha, &paintWetness, ×cale); + + } + /* displace surface */ + else if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE) { + float *value = (float*)sData->type_data; + + if (surface->flags & MOD_DPAINT_DISP_INCREMENTAL) + depth = value[index] + depth; + + if (surface->depth_clamp) { + CLAMP(depth, 0.0f-surface->depth_clamp, surface->depth_clamp); + } + + if (brush->flags & MOD_DPAINT_ERASE) { + value[index] *= (1.0f - strength); + if (value[index] < 0.0f) value[index] = 0.0f; + } + else { + if (value[index] < depth) value[index] = depth; + } + } + /* vertex weight group surface */ + else if (surface->type == MOD_DPAINT_SURFACE_T_WEIGHT) { + float *value = (float*)sData->type_data; + + if (brush->flags & MOD_DPAINT_ERASE) { + value[index] *= (1.0f - strength); + if (value[index] < 0.0f) value[index] = 0.0f; + } + else { + if (value[index] < strength) value[index] = strength; + } + } + /* wave surface */ + else if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) { + if (brush->wave_clamp) { + CLAMP(depth, 0.0f-brush->wave_clamp, brush->wave_clamp); + } + + dynamicPaint_mixWaveHeight(&((PaintWavePoint*)sData->type_data)[index], + brush, 0.0f-depth); + } + + /* doing velocity based painting */ + if (sData->bData->brush_velocity) { + sData->bData->brush_velocity[index*4+3] *= influence; + } +} + +/* checks whether surface and brush bounds intersect depending on brush type */ +static int meshBrush_boundsIntersect(Bounds3D *b1, Bounds3D *b2, DynamicPaintBrushSettings *brush) +{ + if (brush->collision == MOD_DPAINT_COL_VOLUME) + return boundsIntersect(b1, b2); + else if (brush->collision == MOD_DPAINT_COL_DIST || brush->collision == MOD_DPAINT_COL_VOLDIST) + return boundsIntersectDist(b1, b2, brush->paint_distance); + else return 1; +} + +/* calculate velocity for mesh vertices */ +static void dynamicPaint_brushMeshCalculateVelocity(Scene *scene, Object *ob, DynamicPaintBrushSettings *brush, Vec3f **brushVel, float timescale) +{ + int i; + float prev_obmat[4][4]; + DerivedMesh *dm_p, *dm_c; + MVert *mvert_p, *mvert_c; + int numOfVerts_p, numOfVerts_c; + + float cur_sfra = scene->r.subframe; + int cur_fra = scene->r.cfra; + float prev_sfra = cur_sfra - timescale; + int prev_fra = cur_fra; + + if (prev_sfra < 0.0f) { + prev_sfra += 1.0f; + prev_fra = cur_fra - 1; + } + + /* previous frame dm */ + scene->r.cfra = prev_fra; + scene->r.subframe = prev_sfra; + + subframe_updateObject(scene, ob, UPDATE_EVERYTHING, BKE_curframe(scene)); + dm_p = CDDM_copy(brush->dm); + numOfVerts_p = dm_p->getNumVerts(dm_p); + mvert_p = dm_p->getVertArray(dm_p); + copy_m4_m4(prev_obmat, ob->obmat); + + /* current frame dm */ + scene->r.cfra = cur_fra; + scene->r.subframe = cur_sfra; + + subframe_updateObject(scene, ob, UPDATE_EVERYTHING, BKE_curframe(scene)); + dm_c = brush->dm; + numOfVerts_c = dm_c->getNumVerts(dm_c); + mvert_c = dm_p->getVertArray(dm_c); + + (*brushVel) = (struct Vec3f *) MEM_mallocN(numOfVerts_c*sizeof(Vec3f), "Dynamic Paint brush velocity"); + if (!(*brushVel)) return; + + /* if mesh is constructive -> num of verts has changed, + * only use current frame derived mesh */ + if (numOfVerts_p != numOfVerts_c) + mvert_p = mvert_c; + + /* calculate speed */ + #pragma omp parallel for schedule(static) + for (i=0; i<numOfVerts_c; i++) { + float p1[3], p2[3]; + + copy_v3_v3(p1, mvert_p[i].co); + mul_m4_v3(prev_obmat, p1); + + copy_v3_v3(p2, mvert_c[i].co); + mul_m4_v3(ob->obmat, p2); + + sub_v3_v3v3((*brushVel)[i].v, p2, p1); + mul_v3_fl((*brushVel)[i].v, 1.0f/timescale); + } + + dm_p->release(dm_p); +} + +/* calculate velocity for object center point */ +static void dynamicPaint_brushObjectCalculateVelocity(Scene *scene, Object *ob, DynamicPaintBrushSettings *brush, Vec3f *brushVel, float timescale) +{ + float prev_obmat[4][4]; + float cur_loc[3] = {0.0f}, prev_loc[3] = {0.0f}; + + float cur_sfra = scene->r.subframe; + int cur_fra = scene->r.cfra; + float prev_sfra = cur_sfra - timescale; + int prev_fra = cur_fra; + + if (prev_sfra < 0.0f) { + prev_sfra += 1.0f; + prev_fra = cur_fra - 1; + } + + /* previous frame dm */ + scene->r.cfra = prev_fra; + scene->r.subframe = prev_sfra; + subframe_updateObject(scene, ob, UPDATE_PARENTS, BKE_curframe(scene)); + copy_m4_m4(prev_obmat, ob->obmat); + + /* current frame dm */ + scene->r.cfra = cur_fra; + scene->r.subframe = cur_sfra; + subframe_updateObject(scene, ob, UPDATE_PARENTS, BKE_curframe(scene)); + + /* calculate speed */ + mul_m4_v3(prev_obmat, prev_loc); + mul_m4_v3(ob->obmat, cur_loc); + + sub_v3_v3v3(brushVel->v, cur_loc, prev_loc); + mul_v3_fl(brushVel->v, 1.0f/timescale); +} + +/* +* Paint a brush object mesh to the surface +*/ +static int dynamicPaint_paintMesh(DynamicPaintSurface *surface, DynamicPaintBrushSettings *brush, Object *canvasOb, Object *brushOb, BrushMaterials *bMats, Scene *scene, float timescale) +{ + PaintSurfaceData *sData = surface->data; + PaintBakeData *bData = sData->bData; + DerivedMesh *dm = NULL; + Vec3f *brushVelocity = NULL; + MVert *mvert = NULL; + MFace *mface = NULL; + + if (brush->flags & MOD_DPAINT_USES_VELOCITY) + dynamicPaint_brushMeshCalculateVelocity(scene, brushOb, brush, &brushVelocity, timescale); + + if (!brush->dm) return 0; + { + BVHTreeFromMesh treeData = {0}; + float avg_brushNor[3] = {0.0f}; + int numOfVerts; + int ii; + Bounds3D mesh_bb = {0}; + VolumeGrid *grid = bData->grid; + + dm = CDDM_copy(brush->dm); + mvert = dm->getVertArray(dm); + mface = dm->getFaceArray(dm); + numOfVerts = dm->getNumVerts(dm); + + /* Transform collider vertices to global space + * (Faster than transforming per surface point + * coordinates and normals to object space) */ + for (ii=0; ii<numOfVerts; ii++) { + mul_m4_v3(brushOb->obmat, mvert[ii].co); + boundInsert(&mesh_bb, mvert[ii].co); + + /* for project brush calculate average normal */ + if (brush->collision & MOD_DPAINT_COL_DIST && brush->flags & MOD_DPAINT_PROX_PROJECT) { + float nor[3]; + normal_short_to_float_v3(nor, mvert[ii].no); + mul_mat3_m4_v3(brushOb->obmat, nor); + normalize_v3(nor); + + add_v3_v3(avg_brushNor, nor); + } + } + + if (brush->collision & MOD_DPAINT_COL_DIST && brush->flags & MOD_DPAINT_PROX_PROJECT) { + mul_v3_fl(avg_brushNor, 1.0f/(float)numOfVerts); + /* instead of null vector use positive z */ + if (!(MIN3(avg_brushNor[0],avg_brushNor[1],avg_brushNor[2]))) + avg_brushNor[2] = 1.0f; + else + normalize_v3(avg_brushNor); + } + + /* check bounding box collision */ + if(grid && meshBrush_boundsIntersect(&grid->grid_bounds, &mesh_bb, brush)) + /* Build a bvh tree from transformed vertices */ + if (bvhtree_from_mesh_faces(&treeData, dm, 0.0f, 4, 8)) + { + int c_index; + int total_cells = grid->dim[0]*grid->dim[1]*grid->dim[2]; + + /* loop through space partitioning grid */ + for (c_index=0; c_index<total_cells; c_index++) { + int id; + + /* check grid cell bounding box */ + if (!grid->s_num[c_index] || !meshBrush_boundsIntersect(&grid->bounds[c_index], &mesh_bb, brush)) + continue; + + /* loop through cell points and process brush */ + #pragma omp parallel for schedule(static) + for (id = 0; id < grid->s_num[c_index]; id++) + { + int index = grid->t_index[grid->s_pos[c_index] + id]; + int ss, samples = bData->s_num[index]; + float total_sample = (float)samples; + float brushStrength = 0.0f; /* brush influence factor */ + float depth = 0.0f; /* brush intersection depth */ + float velocity_val = 0.0f; + + float paintColor[3] = {0.0f}; + int numOfHits = 0; + + /* for image sequence anti-aliasing, use gaussian factors */ + if (samples > 1 && surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) + total_sample = gaussianTotal; + + /* Supersampling */ + for (ss=0; ss<samples; ss++) + { + + float ray_start[3], ray_dir[3]; + float colorband[4] = {0.0f}; + float sample_factor; + float sampleStrength = 0.0f; + BVHTreeRayHit hit; + BVHTreeNearest nearest; + short hit_found = 0; + + /* hit data */ + float hitCoord[3]; + int hitFace = -1; + short hitQuad; + + /* Supersampling factor */ + if (samples > 1 && surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) + sample_factor = gaussianFactors[ss]; + else + sample_factor = 1.0f; + + /* Get current sample position in world coordinates */ + copy_v3_v3(ray_start, bData->realCoord[bData->s_pos[index]+ss].v); + copy_v3_v3(ray_dir, bData->bNormal[index].invNorm); + + /* a simple hack to minimize chance of ray leaks at identical ray <-> edge locations */ + add_v3_fl(ray_start, 0.001f); + + hit.index = -1; + hit.dist = 9999; + nearest.index = -1; + nearest.dist = brush->paint_distance * brush->paint_distance; /* find_nearest uses squared distance */ + + /* Check volume collision */ + if (brush->collision == MOD_DPAINT_COL_VOLUME || brush->collision == MOD_DPAINT_COL_VOLDIST) + if(BLI_bvhtree_ray_cast(treeData.tree, ray_start, ray_dir, 0.0f, &hit, mesh_faces_spherecast_dp, &treeData) != -1) + { + /* We hit a triangle, now check if collision point normal is facing the point */ + + /* For optimization sake, hit point normal isn't calculated in ray cast loop */ + int v1=mface[hit.index].v1, v2=mface[hit.index].v2, v3=mface[hit.index].v3, quad=(hit.no[0] == 1.0f); + float dot; + + if (quad) {v2=mface[hit.index].v3; v3=mface[hit.index].v4;} + normal_tri_v3( hit.no, mvert[v1].co, mvert[v2].co, mvert[v3].co); + dot = ray_dir[0]*hit.no[0] + ray_dir[1]*hit.no[1] + ray_dir[2]*hit.no[2]; + + /* If ray and hit face normal are facing same direction + * hit point is inside a closed mesh. */ + if (dot>=0) + { + float dist = hit.dist; + int f_index = hit.index; + + /* Also cast a ray in opposite direction to make sure + * point is at least surrounded by two brush faces */ + mul_v3_fl(ray_dir, -1.0f); + hit.index = -1; + hit.dist = 9999; + + BLI_bvhtree_ray_cast(treeData.tree, ray_start, ray_dir, 0.0f, &hit, mesh_faces_spherecast_dp, &treeData); + + if(hit.index != -1) { + /* Add factor on supersample filter */ + sampleStrength += sample_factor; + hit_found = HIT_VOLUME; + + /* Mark hit info */ + madd_v3_v3v3fl(hitCoord, ray_start, ray_dir, hit.dist); /* Calculate final hit coordinates */ + depth += dist*sample_factor; + hitFace = f_index; + hitQuad = quad; + } + } + } + + /* Check proximity collision */ + if ((brush->collision == MOD_DPAINT_COL_DIST || brush->collision == MOD_DPAINT_COL_VOLDIST) && + (!hit_found || (brush->flags & MOD_DPAINT_INVERSE_PROX))) + { + float proxDist = -1.0f; + float hitCo[3]; + short hQuad; + int face; + + /* if inverse prox and no hit found, skip this sample */ + if (brush->flags & MOD_DPAINT_INVERSE_PROX && !hit_found) continue; + + /* If pure distance proximity, find the nearest point on the mesh */ + if (brush->collision != MOD_DPAINT_COL_DIST || !(brush->flags & MOD_DPAINT_PROX_PROJECT)) { + if (BLI_bvhtree_find_nearest(treeData.tree, ray_start, &nearest, mesh_faces_nearest_point_dp, &treeData) != -1) { + proxDist = sqrt(nearest.dist); + copy_v3_v3(hitCo, nearest.co); + hQuad = (nearest.no[0] == 1.0f); + face = nearest.index; + } + } + else { /* else cast a ray in defined projection direction */ + float proj_ray[3] = {0.0f}; + + if (brush->ray_dir == MOD_DPAINT_RAY_CANVAS) { + copy_v3_v3(proj_ray, bData->bNormal[index].invNorm); + negate_v3(proj_ray); + } + else if (brush->ray_dir == MOD_DPAINT_RAY_BRUSH_AVG) { + copy_v3_v3(proj_ray, avg_brushNor); + } + else { /* MOD_DPAINT_RAY_ZPLUS */ + proj_ray[2] = 1.0f; + } + hit.index = -1; + hit.dist = brush->paint_distance; + + /* Do a face normal directional raycast, and use that distance */ + if(BLI_bvhtree_ray_cast(treeData.tree, ray_start, proj_ray, 0.0f, &hit, mesh_faces_spherecast_dp, &treeData) != -1) + { + proxDist = hit.dist; + madd_v3_v3v3fl(hitCo, ray_start, proj_ray, hit.dist); /* Calculate final hit coordinates */ + hQuad = (hit.no[0] == 1.0f); + face = hit.index; + } + } + + /* If a hit was found, calculate required values */ + if (proxDist >= 0.0f && proxDist <= brush->paint_distance) { + float dist_rate = proxDist / brush->paint_distance; + float prox_influence = 0.0f; + + /* in case of inverse prox also undo volume effect */ + if (brush->flags & MOD_DPAINT_INVERSE_PROX) { + sampleStrength -= sample_factor; + dist_rate = 1.0f - dist_rate; + } + + /* if using proximity color ramp use it's alpha */ + if (brush->proximity_falloff == MOD_DPAINT_PRFALL_RAMP && do_colorband(brush->paint_ramp, dist_rate, colorband)) + prox_influence = colorband[3]; + else if (brush->proximity_falloff == MOD_DPAINT_PRFALL_SMOOTH) { + prox_influence = (1.0f - dist_rate) * sample_factor; + } + else prox_influence = (brush->flags & MOD_DPAINT_INVERSE_PROX) ? 0.0f : 1.0f; + + hit_found = HIT_PROXIMITY; + sampleStrength += prox_influence*sample_factor; + + /* if no volume hit, use prox point face info */ + if (hitFace == -1) { + copy_v3_v3(hitCoord, hitCo); + hitQuad = hQuad; + hitFace = face; + } + } + } + + if (!hit_found) continue; + + /* velocity brush, only do on main sample */ + if (brush->flags & MOD_DPAINT_USES_VELOCITY && ss==0 && brushVelocity) { + int v1,v2,v3; + float weights[4]; + float brushPointVelocity[3]; + float velocity[3]; + + if (!hitQuad) { + v1 = mface[hitFace].v1; + v2 = mface[hitFace].v2; + v3 = mface[hitFace].v3; + } + else { + v1 = mface[hitFace].v2; + v2 = mface[hitFace].v3; + v3 = mface[hitFace].v4; + } + /* calculate barycentric weights for hit point */ + interp_weights_face_v3(weights, mvert[v1].co, mvert[v2].co, mvert[v3].co, NULL, hitCoord); + + /* simple check based on brush surface velocity, + * todo: perhaps implement something that handles volume movement as well */ + + /* interpolate vertex speed vectors to get hit point velocity */ + interp_v3_v3v3v3( brushPointVelocity, + brushVelocity[v1].v, + brushVelocity[v2].v, + brushVelocity[v3].v, weights); + + /* substract canvas point velocity */ + if (bData->velocity) { + sub_v3_v3v3(velocity, brushPointVelocity, bData->velocity[index].v); + } + else { + copy_v3_v3(velocity, brushPointVelocity); + } + velocity_val = len_v3(velocity); + + /* if brush has smudge enabled store brush velocity */ + if (brush->flags & MOD_DPAINT_DO_SMUDGE && bData->brush_velocity) { + copy_v3_v3(&bData->brush_velocity[index*4], velocity); + mul_v3_fl(&bData->brush_velocity[index*4], 1.0f/velocity_val); + bData->brush_velocity[index*4+3] = velocity_val; + } + } + + /* + * Process hit color and alpha + */ + if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) + { + float sampleColor[3]; + float alpha_factor = 1.0f; + + sampleColor[0] = brush->r; + sampleColor[1] = brush->g; + sampleColor[2] = brush->b; + + /* Get material+textures color on hit point if required */ + if (brush->flags & MOD_DPAINT_USE_MATERIAL) + dynamicPaint_doMaterialTex(bMats, sampleColor, &alpha_factor, brushOb, bData->realCoord[bData->s_pos[index]+ss].v, hitCoord, hitFace, hitQuad, brush->dm); + + /* Sample proximity colorband if required */ + if ((hit_found == HIT_PROXIMITY) && (brush->proximity_falloff == MOD_DPAINT_PRFALL_RAMP)) { + if (!(brush->flags & MOD_DPAINT_RAMP_ALPHA)) { + sampleColor[0] = colorband[0]; + sampleColor[1] = colorband[1]; + sampleColor[2] = colorband[2]; + } + } + + /* Add AA sample */ + paintColor[0] += sampleColor[0]; + paintColor[1] += sampleColor[1]; + paintColor[2] += sampleColor[2]; + sampleStrength *= alpha_factor; + numOfHits++; + } + + /* apply sample strength */ + brushStrength += sampleStrength; + } // end supersampling + + + /* if any sample was inside paint range */ + if (brushStrength > 0.0f || depth > 0.0f) { + + /* apply supersampling results */ + if (samples > 1) { + brushStrength /= total_sample; + } + CLAMP(brushStrength, 0.0f, 1.0f); + + if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) { + /* Get final pixel color and alpha */ + paintColor[0] /= numOfHits; + paintColor[1] /= numOfHits; + paintColor[2] /= numOfHits; + } + /* get final object space depth */ + else if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE || + surface->type == MOD_DPAINT_SURFACE_T_WAVE) { + depth /= bData->bNormal[index].normal_scale * total_sample; + } + + dynamicPaint_updatePointData(surface, index, brush, paintColor, brushStrength, depth, velocity_val, timescale); + } + } + } + } + /* free bvh tree */ + free_bvhtree_from_mesh(&treeData); + dm->release(dm); + + } + + /* free brush velocity data */ + if (brushVelocity) + MEM_freeN(brushVelocity); + + return 1; +} + +/* +* Paint a particle system to the surface +*/ +static int dynamicPaint_paintParticles(DynamicPaintSurface *surface, ParticleSystem *psys, DynamicPaintBrushSettings *brush, Object *canvasOb, float timescale) +{ + ParticleSettings *part=psys->part; + ParticleData *pa = NULL; + PaintSurfaceData *sData = surface->data; + PaintBakeData *bData = sData->bData; + VolumeGrid *grid = bData->grid; + + KDTree *tree; + int particlesAdded = 0; + int invalidParticles = 0; + int p = 0; + + float solidradius = (brush->flags & MOD_DPAINT_PART_RAD) ? psys->part->size : brush->particle_radius; + float smooth = brush->particle_smooth; + + float range = solidradius + smooth; + float particle_timestep = 0.04f * part->timetweak; + + Bounds3D part_bb; + + if (psys->totpart < 1) return 1; + + /* + * Build a kd-tree to optimize distance search + */ + tree= BLI_kdtree_new(psys->totpart); + + /* loop through particles and insert valid ones to the tree */ + for(p=0, pa=psys->particles; p<psys->totpart; p++, pa++) { + + /* Proceed only if particle is active */ + if(pa->alive == PARS_UNBORN && (part->flag & PART_UNBORN)==0) continue; + else if(pa->alive == PARS_DEAD && (part->flag & PART_DIED)==0) continue; + else if(pa->flag & PARS_NO_DISP || pa->flag & PARS_UNEXIST) continue; + + /* for debug purposes check if any NAN particle proceeds + * For some reason they get past activity check, this should rule most of them out */ + if (isnan(pa->state.co[0]) || isnan(pa->state.co[1]) || isnan(pa->state.co[2])) {invalidParticles++;continue;} + + /* make sure particle is close enough to canvas */ + if (!boundIntersectPoint(&grid->grid_bounds, pa->state.co, range)) continue; + + BLI_kdtree_insert(tree, p, pa->state.co, NULL); + + /* calc particle system bounds */ + boundInsert(&part_bb, pa->state.co); + + particlesAdded++; + } + if (invalidParticles) + printf("Warning: Invalid particle(s) found!\n"); + + /* If no suitable particles were found, exit */ + if (particlesAdded < 1) { + BLI_kdtree_free(tree); + return 1; + } + + /* begin thread safe malloc */ + BLI_begin_threaded_malloc(); + + /* only continue if particle bb is close enough to canvas bb */ + if (boundsIntersectDist(&grid->grid_bounds, &part_bb, range)) + { + int c_index; + int total_cells = grid->dim[0]*grid->dim[1]*grid->dim[2]; + + /* balance tree */ + BLI_kdtree_balance(tree); + + /* loop through space partitioning grid */ + for (c_index=0; c_index<total_cells; c_index++) { + int id; + + /* check cell bounding box */ + if (!grid->s_num[c_index] || + !boundsIntersectDist(&grid->bounds[c_index], &part_bb, range)) + continue; + + /* loop through cell points */ + #pragma omp parallel for schedule(static) + for (id = 0; id < grid->s_num[c_index]; id++) + { + int index = grid->t_index[grid->s_pos[c_index] + id]; + float disp_intersect = 0.0f; + float radius = 0.0f; + float strength = 0.0f; + float velocity_val = 0.0f; + int part_index; + + /* + * With predefined radius, there is no variation between particles. + * It's enough to just find the nearest one. + */ + { + KDTreeNearest nearest; + float smooth_range, part_solidradius; + + /* Find nearest particle and get distance to it */ + BLI_kdtree_find_nearest(tree, bData->realCoord[bData->s_pos[index]].v, NULL, &nearest); + /* if outside maximum range, no other particle can influence either */ + if (nearest.dist > range) continue; + + if (brush->flags & MOD_DPAINT_PART_RAD) { + /* use particles individual size */ + ParticleData *pa = psys->particles + nearest.index; + part_solidradius = pa->size; + } + else { + part_solidradius = solidradius; + } + radius = part_solidradius + smooth; + if (nearest.dist < radius) { + /* distances inside solid radius has maximum influence -> dist = 0 */ + smooth_range = (nearest.dist - part_solidradius); + if (smooth_range<0.0f) smooth_range=0.0f; + /* do smoothness if enabled */ + if (smooth) smooth_range/=smooth; + + strength = 1.0f - smooth_range; + disp_intersect = radius - nearest.dist; + part_index = nearest.index; + } + } + /* If using random per particle radius and closest particle didn't give max influence */ + if (brush->flags & MOD_DPAINT_PART_RAD && strength < 1.0f && psys->part->randsize > 0.0f) { + /* + * If we use per particle radius, we have to sample all particles + * within max radius range + */ + KDTreeNearest *nearest; + + int n, particles = 0; + float smooth_range = smooth * (1.0f-strength), dist; + /* calculate max range that can have particles with higher influence than the nearest one */ + float max_range = smooth - strength*smooth + solidradius; + + particles = BLI_kdtree_range_search(tree, max_range, bData->realCoord[bData->s_pos[index]].v, NULL, &nearest); + + /* Find particle that produces highest influence */ + for(n=0; n<particles; n++) { + ParticleData *pa = psys->particles + nearest[n].index; + float s_range; + + /* skip if out of range */ + if (nearest[n].dist > (pa->size + smooth)) + continue; + + /* update hit data */ + s_range = nearest[n].dist - pa->size; + /* skip if higher influence is already found */ + if (smooth_range < s_range) + continue; + + /* update hit data */ + smooth_range = s_range; + dist = nearest[n].dist; + part_index = nearest[n].index; + + /* If inside solid range and no disp depth required, no need to seek further */ + if (s_range < 0.0f) + if (surface->type != MOD_DPAINT_SURFACE_T_DISPLACE && + surface->type != MOD_DPAINT_SURFACE_T_WAVE) + break; + } + + if (nearest) MEM_freeN(nearest); + + /* now calculate influence for this particle */ + { + float rad = radius + smooth, str; + if ((rad-dist) > disp_intersect) { + disp_intersect = radius - dist; + radius = rad; + } + + /* do smoothness if enabled */ + if (smooth_range<0.0f) smooth_range=0.0f; + if (smooth) smooth_range/=smooth; + str = 1.0f - smooth_range; + /* if influence is greater, use this one */ + if (str > strength) strength = str; + } + } + + if (strength > 0.001f) + { + float paintColor[4] = {0.0f}; + float depth = 0.0f; + + /* apply velocity */ + if (brush->flags & MOD_DPAINT_USES_VELOCITY) { + float velocity[3]; + ParticleData *pa = psys->particles + part_index; + mul_v3_v3fl(velocity, pa->state.vel, particle_timestep); + + /* substract canvas point velocity */ + if (bData->velocity) { + sub_v3_v3(velocity, bData->velocity[index].v); + } + velocity_val = len_v3(velocity); + + /* store brush velocity for smudge */ + if (brush->flags & MOD_DPAINT_DO_SMUDGE && bData->brush_velocity) { + copy_v3_v3(&bData->brush_velocity[index*4], velocity); + mul_v3_fl(&bData->brush_velocity[index*4], 1.0f/velocity_val); + bData->brush_velocity[index*4+3] = velocity_val; + } + } + + if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) { + paintColor[0] = brush->r; + paintColor[1] = brush->g; + paintColor[2] = brush->b; + } + else if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE || + surface->type == MOD_DPAINT_SURFACE_T_WAVE) { + /* get displace depth */ + disp_intersect = (1.0f - sqrt(disp_intersect / radius)) * radius; + depth = (radius - disp_intersect) / bData->bNormal[index].normal_scale; + if (depth<0.0f) depth = 0.0f; + } + + dynamicPaint_updatePointData(surface, index, brush, paintColor, strength, depth, velocity_val, timescale); + } + } + } + } + BLI_end_threaded_malloc(); + BLI_kdtree_free(tree); + + return 1; +} + +/* paint a single point of defined proximity radius to the surface */ +static int dynamicPaint_paintSinglePoint(DynamicPaintSurface *surface, float *pointCoord, DynamicPaintBrushSettings *brush, + Object *canvasOb, Object *brushOb, BrushMaterials *bMats, Scene *scene, float timescale) +{ + int index; + PaintSurfaceData *sData = surface->data; + PaintBakeData *bData = sData->bData; + Vec3f brushVel; + + if (brush->flags & MOD_DPAINT_USES_VELOCITY) + dynamicPaint_brushObjectCalculateVelocity(scene, brushOb, brush, &brushVel, timescale); + + /* + * Loop through every surface point + */ + #pragma omp parallel for schedule(static) + for (index = 0; index < sData->total_points; index++) + { + float distance = len_v3v3(pointCoord, bData->realCoord[bData->s_pos[index]].v); + float colorband[4] = {0.0f}; + float strength; + + if (distance>brush->paint_distance) continue; + + /* Smooth range or color ramp */ + if (brush->proximity_falloff == MOD_DPAINT_PRFALL_SMOOTH || + brush->proximity_falloff == MOD_DPAINT_PRFALL_RAMP) { + + strength = 1.0f - distance / brush->paint_distance; + CLAMP(strength, 0.0f, 1.0f); + } + else strength = 1.0f; + + if (strength >= 0.001f) { + float paintColor[3] = {0.0f}; + float depth = 0.0f; + float velocity_val = 0.0f; + + /* material */ + if (brush->flags & MOD_DPAINT_USE_MATERIAL) { + float alpha_factor = 1.0f; + float hit_coord[3]; + MVert *mvert = brush->dm->getVertArray(brush->dm); + /* use dummy coord of first vertex */ + copy_v3_v3(hit_coord, mvert[0].co); + mul_m4_v3(brushOb->obmat, hit_coord); + + dynamicPaint_doMaterialTex(bMats, paintColor, &alpha_factor, brushOb, bData->realCoord[bData->s_pos[index]].v, hit_coord, 0, 0, brush->dm); + } + + /* color ramp */ + if (brush->proximity_falloff == MOD_DPAINT_PRFALL_RAMP && do_colorband(brush->paint_ramp, (1.0f-strength), colorband)) + strength = colorband[3]; + + if (brush->flags & MOD_DPAINT_USES_VELOCITY) { + float velocity[3]; + + /* substract canvas point velocity */ + if (bData->velocity) { + sub_v3_v3v3(velocity, brushVel.v, bData->velocity[index].v); + } + else { + copy_v3_v3(velocity, brushVel.v); + } + velocity_val = len_v3(velocity); + + /* store brush velocity for smudge */ + if (brush->flags & MOD_DPAINT_DO_SMUDGE && bData->brush_velocity) { + copy_v3_v3(&bData->brush_velocity[index*4], velocity); + mul_v3_fl(&bData->brush_velocity[index*4], 1.0f/velocity_val); + bData->brush_velocity[index*4+3] = velocity_val; + } + } + + if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) { + if (brush->proximity_falloff == MOD_DPAINT_PRFALL_RAMP && + !(brush->flags & MOD_DPAINT_RAMP_ALPHA)) { + paintColor[0] = colorband[0]; + paintColor[1] = colorband[1]; + paintColor[2] = colorband[2]; + } + else { + if (!(brush->flags & MOD_DPAINT_USE_MATERIAL)) { + paintColor[0] = brush->r; + paintColor[1] = brush->g; + paintColor[2] = brush->b; + } + } + } + else if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE || + surface->type == MOD_DPAINT_SURFACE_T_WAVE) { + /* get displace depth */ + float disp_intersect = (1.0f - sqrt((brush->paint_distance-distance) / brush->paint_distance)) * brush->paint_distance; + depth = (brush->paint_distance - disp_intersect) / bData->bNormal[index].normal_scale; + if (depth<0.0f) depth = 0.0f; + } + dynamicPaint_updatePointData(surface, index, brush, paintColor, strength, depth, velocity_val, timescale); + } + } + + return 1; +} + + +/***************************** Dynamic Paint Step / Baking ******************************/ + +/* +* Calculate current frame neighbouring point distances +* and direction vectors +*/ +static void dynamicPaint_prepareNeighbourData(DynamicPaintSurface *surface, int force_init) +{ + PaintSurfaceData *sData = surface->data; + PaintBakeData *bData = sData->bData; + BakeNeighPoint *bNeighs; + PaintAdjData *adj_data = sData->adj_data; + Vec3f *realCoord = bData->realCoord; + int index; + + if ((!surface_usesAdjDistance(surface) && !force_init) || !sData->adj_data) return; + + if (bData->bNeighs) MEM_freeN(bData->bNeighs); + bNeighs = bData->bNeighs = MEM_mallocN(sData->adj_data->total_targets*sizeof(struct BakeNeighPoint),"PaintEffectBake"); + if (!bNeighs) return; + + #pragma omp parallel for schedule(static) + for (index = 0; index < sData->total_points; index++) + { + int i; + int numOfNeighs = adj_data->n_num[index]; + + for (i=0; i<numOfNeighs; i++) { + int n_index = adj_data->n_index[index]+i; + int t_index = adj_data->n_target[n_index]; + + /* dir vec */ + sub_v3_v3v3(bNeighs[n_index].dir, realCoord[bData->s_pos[t_index]].v, realCoord[bData->s_pos[index]].v); + /* dist */ + bNeighs[n_index].dist = len_v3(bNeighs[n_index].dir); + /* normalize dir */ + if (bNeighs[n_index].dist) mul_v3_fl(bNeighs[n_index].dir, 1.0f/bNeighs[n_index].dist); + } + } + + /* calculate average values (single thread) */ + bData->average_dist = 0.0f; + for (index = 0; index < sData->total_points; index++) + { + int i; + int numOfNeighs = adj_data->n_num[index]; + + for (i=0; i<numOfNeighs; i++) { + bData->average_dist += bNeighs[adj_data->n_index[index]+i].dist; + } + } + bData->average_dist /= adj_data->total_targets; +} + +/* find two adjacency points (closest_id) and influence (closest_d) to move paint towards when affected by a force */ +void surface_determineForceTargetPoints(PaintSurfaceData *sData, int index, float force[3], float closest_d[2], int closest_id[2]) +{ + BakeNeighPoint *bNeighs = sData->bData->bNeighs; + int numOfNeighs = sData->adj_data->n_num[index]; + int i; + + closest_id[0]=closest_id[1]= -1; + closest_d[0]=closest_d[1]= -1.0f; + + /* find closest neigh */ + for (i=0; i<numOfNeighs; i++) { + int n_index = sData->adj_data->n_index[index]+i; + float dir_dot = dot_v3v3(bNeighs[n_index].dir, force); + + if (dir_dot>closest_d[0] && dir_dot>0.0f) {closest_d[0]=dir_dot; closest_id[0]=n_index;} + } + + if (closest_d[0] < 0.0f) return; + + /* find second closest neigh */ + for (i=0; i<numOfNeighs; i++) { + int n_index = sData->adj_data->n_index[index]+i; + float dir_dot = dot_v3v3(bNeighs[n_index].dir, force); + float closest_dot = dot_v3v3(bNeighs[n_index].dir, bNeighs[closest_id[0]].dir); + + if (n_index == closest_id[0]) continue; + + /* only accept neighbour at "other side" of the first one in relation to force dir + * so make sure angle between this and closest neigh is greater than first angle */ + if (dir_dot>closest_d[1] && closest_dot<closest_d[0] && dir_dot>0.0f) {closest_d[1]=dir_dot; closest_id[1]=n_index;} + } + + /* if two valid neighs found, calculate how force effect is divided + * evenly between them (so that d[0]+d[1] = 1.0)*/ + if (closest_id[1] != -1) { + float force_proj[3]; + float tangent[3]; + float neigh_diff = acos(dot_v3v3(bNeighs[closest_id[0]].dir, bNeighs[closest_id[1]].dir)); + float force_intersect; + float temp; + + /* project force vector on the plane determined by these two neightbour points + * and calculate relative force angle from it*/ + cross_v3_v3v3(tangent, bNeighs[closest_id[0]].dir, bNeighs[closest_id[1]].dir); + normalize_v3(tangent); + force_intersect = dot_v3v3(force, tangent); + madd_v3_v3v3fl(force_proj, force, tangent, (-1.0f)*force_intersect); + normalize_v3(force_proj); + + /* get drip factor based on force dir in relation to angle between those neighbours */ + temp = dot_v3v3(bNeighs[closest_id[0]].dir, force_proj); + CLAMP(temp, -1.0f, 1.0f); /* float precision might cause values > 1.0f that return infinite */ + closest_d[1] = acos(temp)/neigh_diff; + closest_d[0] = 1.0f - closest_d[1]; + + /* and multiply depending on how deeply force intersects surface */ + temp = fabs(force_intersect); + CLAMP(temp, 0.0f, 1.0f); + closest_d[0] *= acos(temp)/1.57079633f; + closest_d[1] *= acos(temp)/1.57079633f; + } + else { + /* if only single neighbour, still linearize force intersection effect */ + closest_d[0] = 1.0f - acos(closest_d[0])/1.57079633f; + } +} + +static void dynamicPaint_doSmudge(DynamicPaintSurface *surface, DynamicPaintBrushSettings *brush, float timescale) +{ + PaintSurfaceData *sData = surface->data; + PaintBakeData *bData = sData->bData; + BakeNeighPoint *bNeighs = sData->bData->bNeighs; + int index, steps, step; + float eff_scale, max_velocity = 0.0f; + + if (!sData->adj_data) return; + + /* find max velocity */ + for (index = 0; index < sData->total_points; index++) { + float vel = bData->brush_velocity[index*4+3]; + if (vel > max_velocity) max_velocity = vel; + } + + steps = (int)ceil(max_velocity / bData->average_dist * timescale); + CLAMP(steps, 0, 12); + eff_scale = brush->smudge_strength/(float)steps*timescale; + + for (step=0; step<steps; step++) { + + for (index = 0; index < sData->total_points; index++) { + int i; + PaintPoint *pPoint = &((PaintPoint*)sData->type_data)[index]; + float smudge_str = bData->brush_velocity[index*4+3]; + + /* force targets */ + int closest_id[2]; + float closest_d[2]; + + if (!smudge_str) continue; + + /* get force affect points */ + surface_determineForceTargetPoints(sData, index, &bData->brush_velocity[index*4], closest_d, closest_id); + + /* Apply movement towards those two points */ + for (i=0; i<2; i++) { + int n_index = closest_id[i]; + if (n_index != -1 && closest_d[i]>0.0f) { + float dir_dot = closest_d[i], dir_factor; + float speed_scale = eff_scale*smudge_str/bNeighs[n_index].dist; + float mix; + PaintPoint *ePoint = &((PaintPoint*)sData->type_data)[sData->adj_data->n_target[n_index]]; + + /* just skip if angle is too extreme */ + if (dir_dot <= 0.0f) continue; + + dir_factor = dir_dot * speed_scale; + if (dir_factor > brush->smudge_strength) dir_factor = brush->smudge_strength; + + /* mix new color and alpha */ + mix = dir_factor*pPoint->alpha; + if (mix) mixColors(ePoint->color, ePoint->alpha, pPoint->color, mix); + ePoint->alpha = ePoint->alpha*(1.0f-dir_factor) + pPoint->alpha*dir_factor; + + /* smudge "wet layer" */ + mix = dir_factor*pPoint->e_alpha; + if (mix) mixColors(ePoint->e_color, ePoint->e_alpha, pPoint->e_color, mix); + ePoint->e_alpha = ePoint->e_alpha*(1.0f-dir_factor) + pPoint->e_alpha*dir_factor; + pPoint->wetness *= (1.0f-dir_factor); + } + } + } + } +} + +/* +* Prepare data required by effects for current frame. +* Returns number of steps required +*/ +static int dynamicPaint_prepareEffectStep(DynamicPaintSurface *surface, Scene *scene, Object *ob, float **force, float timescale) +{ + double average_force = 0.0f; + float shrink_speed=0.0f, spread_speed=0.0f; + float fastest_effect; + int steps; + PaintSurfaceData *sData = surface->data; + PaintBakeData *bData = sData->bData; + Vec3f *realCoord = bData->realCoord; + int index; + + /* Init force data if required */ + if (surface->effect & MOD_DPAINT_EFFECT_DO_DRIP) { + float vel[3] = {0}; + ListBase *effectors = pdInitEffectors(scene, ob, NULL, surface->effector_weights); + + /* allocate memory for force data (dir vector + strength) */ + *force = MEM_mallocN(sData->total_points*4*sizeof(float), "PaintEffectForces"); + + if (*force) { + #pragma omp parallel for schedule(static) + for (index = 0; index < sData->total_points; index++) + { + float forc[3] = {0}; + + /* apply force fields */ + if (effectors) { + EffectedPoint epoint; + pd_point_from_loc(scene, realCoord[bData->s_pos[index]].v, vel, index, &epoint); + epoint.vel_to_sec = 1.0f; + pdDoEffectors(effectors, NULL, surface->effector_weights, &epoint, forc, NULL); + } + + /* if global gravity is enabled, add it too */ + if (scene->physics_settings.flag & PHYS_GLOBAL_GRAVITY) + /* also divide by 10 to about match default grav + * with default force strength (1.0) */ + madd_v3_v3fl(forc, scene->physics_settings.gravity, + surface->effector_weights->global_gravity*surface->effector_weights->weight[0] / 10.f); + + /* add surface point velocity and acceleration if enabled */ + if (bData->velocity) { + if (surface->drip_vel) + madd_v3_v3fl(forc, bData->velocity[index].v, surface->drip_vel*(-1.0f)); + + /* acceleration */ + if (bData->prev_velocity && surface->drip_acc) { + float acc[3]; + copy_v3_v3(acc, bData->velocity[index].v); + sub_v3_v3(acc, bData->prev_velocity[index].v); + madd_v3_v3fl(forc, acc, surface->drip_acc*(-1.0f)); + } + } + + /* force strength */ + (*force)[index*4+3] = len_v3(forc); + /* normalize and copy */ + if ((*force)[index*4+3]) mul_v3_fl(forc, 1.0f/(*force)[index*4+3]); + copy_v3_v3(&((*force)[index*4]), forc); + } + + /* calculate average values (single thread) */ + for (index = 0; index < sData->total_points; index++) + { + average_force += (*force)[index*4+3]; + } + average_force /= sData->total_points; + } + pdEndEffectors(&effectors); + } + + /* Get number of required steps using averate point distance + * so that just a few ultra close pixels wont up substeps to max */ + + /* adjust number of required substep by fastest active effect */ + if (surface->effect & MOD_DPAINT_EFFECT_DO_SPREAD) + spread_speed = surface->spread_speed; + if (surface->effect & MOD_DPAINT_EFFECT_DO_SHRINK) + shrink_speed = surface->shrink_speed; + + fastest_effect = MAX3(spread_speed, shrink_speed, average_force); + + steps = (int)ceil(1.5f*EFF_MOVEMENT_PER_FRAME*fastest_effect/bData->average_dist*timescale); + CLAMP(steps, 1, 14); + + return steps; +} + +/* +* Processes active effect step. +*/ +static void dynamicPaint_doEffectStep(DynamicPaintSurface *surface, float *force, PaintPoint *prevPoint, float timescale, float steps) +{ + PaintSurfaceData *sData = surface->data; + BakeNeighPoint *bNeighs = sData->bData->bNeighs; + int index; + timescale /= steps; + + if (!sData->adj_data) return; + + /* + * Spread Effect + */ + if (surface->effect & MOD_DPAINT_EFFECT_DO_SPREAD) { + float eff_scale = EFF_MOVEMENT_PER_FRAME*surface->spread_speed*timescale; + + /* Copy current surface to the previous points array to read unmodified values */ + memcpy(prevPoint, sData->type_data, sData->total_points*sizeof(struct PaintPoint)); + + #pragma omp parallel for schedule(static) + for (index = 0; index < sData->total_points; index++) + { + int i; + int numOfNeighs = sData->adj_data->n_num[index]; + float totalAlpha = 0.0f; + PaintPoint *pPoint = &((PaintPoint*)sData->type_data)[index]; + + /* Only reads values from the surface copy (prevPoint[]), + * so this one is thread safe */ + + /* Loop through neighbouring points */ + for (i=0; i<numOfNeighs; i++) { + int n_index = sData->adj_data->n_index[index]+i; + float w_factor, alphaAdd = 0.0f; + PaintPoint *ePoint = &prevPoint[sData->adj_data->n_target[n_index]]; + float speed_scale = (bNeighs[n_index].dist<eff_scale) ? 1.0f : eff_scale/bNeighs[n_index].dist; + float color_mix = (MIN2(ePoint->wetness, pPoint->wetness))*0.25f*surface->color_spread_speed; + + totalAlpha += ePoint->e_alpha; + + /* do color mixing */ + if (color_mix) mixColors(pPoint->e_color, pPoint->e_alpha, ePoint->e_color, color_mix); + + /* Check if neighbouring point has higher wetness, + * if so, add it's wetness to this point as well*/ + if (ePoint->wetness <= pPoint->wetness) continue; + w_factor = ePoint->wetness/numOfNeighs * (ePoint->wetness - pPoint->wetness) * speed_scale; + if (w_factor <= 0.0f) continue; + + if (ePoint->e_alpha > pPoint->e_alpha) { + alphaAdd = ePoint->e_alpha/numOfNeighs * (ePoint->wetness*ePoint->e_alpha - pPoint->wetness*pPoint->e_alpha) * speed_scale; + } + + /* mix new color */ + mixColors(pPoint->e_color, pPoint->e_alpha, ePoint->e_color, w_factor); + + pPoint->e_alpha += alphaAdd; + pPoint->wetness += w_factor; + + if (pPoint->e_alpha > 1.0f) pPoint->e_alpha = 1.0f; + } + + /* For antialiasing sake, don't let alpha go much higher than average alpha of neighbours */ + if (pPoint->e_alpha > (totalAlpha/numOfNeighs+0.25f)) { + pPoint->e_alpha = (totalAlpha/numOfNeighs+0.25f); + if (pPoint->e_alpha>1.0f) pPoint->e_alpha = 1.0f; + } + } + } + + /* + * Shrink Effect + */ + if (surface->effect & MOD_DPAINT_EFFECT_DO_SHRINK) { + float eff_scale = EFF_MOVEMENT_PER_FRAME*surface->shrink_speed*timescale; + + /* Copy current surface to the previous points array to read unmodified values */ + memcpy(prevPoint, sData->type_data, sData->total_points*sizeof(struct PaintPoint)); + + #pragma omp parallel for schedule(static) + for (index = 0; index < sData->total_points; index++) + { + int i; + int numOfNeighs = sData->adj_data->n_num[index]; + float totalAlpha = 0.0f; + PaintPoint *pPoint = &((PaintPoint*)sData->type_data)[index]; + + for (i=0; i<numOfNeighs; i++) { + int n_index = sData->adj_data->n_index[index]+i; + float speed_scale = (bNeighs[n_index].dist<eff_scale) ? 1.0f : eff_scale/bNeighs[n_index].dist; + PaintPoint *ePoint = &prevPoint[sData->adj_data->n_target[n_index]]; + float a_factor, ea_factor, w_factor; + + totalAlpha += ePoint->e_alpha; + + /* Check if neighbouring point has lower alpha, + * if so, decrease this point's alpha as well*/ + if (pPoint->alpha <= 0.0f && pPoint->e_alpha <= 0.0f && pPoint->wetness <= 0.0f) continue; + + /* decrease factor for dry paint alpha */ + a_factor = (1.0f - ePoint->alpha)/numOfNeighs * (pPoint->alpha - ePoint->alpha) * speed_scale; + if (a_factor < 0.0f) a_factor = 0.0f; + /* decrease factor for wet paint alpha */ + ea_factor = (1.0f - ePoint->e_alpha)/8 * (pPoint->e_alpha - ePoint->e_alpha) * speed_scale; + if (ea_factor < 0.0f) ea_factor = 0.0f; + /* decrease factor for paint wetness */ + w_factor = (1.0f - ePoint->wetness)/8 * (pPoint->wetness - ePoint->wetness) * speed_scale; + if (w_factor < 0.0f) w_factor = 0.0f; + + pPoint->alpha -= a_factor; + if (pPoint->alpha < 0.0f) pPoint->alpha = 0.0f; + pPoint->e_alpha -= ea_factor; + if (pPoint->e_alpha < 0.0f) pPoint->e_alpha = 0.0f; + pPoint->wetness -= w_factor; + if (pPoint->wetness < 0.0f) pPoint->wetness = 0.0f; + } + } + } + + /* + * Drip Effect + */ + if (surface->effect & MOD_DPAINT_EFFECT_DO_DRIP && force) + { + float eff_scale = EFF_MOVEMENT_PER_FRAME*timescale/2.0f; + /* Copy current surface to the previous points array to read unmodified values */ + memcpy(prevPoint, sData->type_data, sData->total_points*sizeof(struct PaintPoint)); + + for (index = 0; index < sData->total_points; index++) { + int i; + PaintPoint *pPoint = &((PaintPoint*)sData->type_data)[index]; + PaintPoint *pPoint_prev = &prevPoint[index]; + + int closest_id[2]; + float closest_d[2]; + + /* adjust drip speed depending on wetness */ + float w_factor = pPoint_prev->wetness*0.5 - 0.025f; + if (w_factor <= 0) continue; + + /* get force affect points */ + surface_determineForceTargetPoints(sData, index, &force[index*4], closest_d, closest_id); + + /* Apply movement towards those two points */ + for (i=0; i<2; i++) { + int n_index = closest_id[i]; + if (n_index != -1 && closest_d[i]>0.0f) { + float dir_dot = closest_d[i], dir_factor; + float speed_scale = eff_scale*force[index*4+3]/bNeighs[n_index].dist; + PaintPoint *ePoint = &((PaintPoint*)sData->type_data)[sData->adj_data->n_target[n_index]]; + + /* just skip if angle is too extreme */ + if (dir_dot <= 0.0f) continue; + + dir_factor = dir_dot * speed_scale * w_factor; + if (dir_factor > (0.5f/steps)) dir_factor = (0.5f/steps); + + /* mix new color */ + if (dir_factor) mixColors(ePoint->e_color, ePoint->e_alpha, pPoint->e_color, dir_factor); + + ePoint->e_alpha += dir_factor; + ePoint->wetness += dir_factor; + if (ePoint->e_alpha > 1.0f) ePoint->e_alpha = 1.0f; + + /* and decrease paint wetness on current point */ + pPoint->wetness -= dir_factor; + } + } + } + + /* Keep values within acceptable range */ + #pragma omp parallel for schedule(static) + for (index = 0; index < sData->total_points; index++) + { + PaintPoint *cPoint = &((PaintPoint*)sData->type_data)[index]; + + if (cPoint->e_alpha > 1.0f) cPoint->e_alpha=1.0f; + if (cPoint->wetness > 2.0f) cPoint->wetness=2.0f; + + if (cPoint->e_alpha < 0.0f) cPoint->e_alpha=0.0f; + if (cPoint->wetness < 0.0f) cPoint->wetness=0.0f; + } + } +} + +void dynamicPaint_doWaveStep(DynamicPaintSurface *surface, float timescale) +{ + PaintSurfaceData *sData = surface->data; + BakeNeighPoint *bNeighs = sData->bData->bNeighs; + int index; + int steps, ss; + float dt, min_dist, damp_factor; + float wave_speed = surface->wave_speed; + double average_dist = 0.0f; + + /* allocate memory */ + PaintWavePoint *prevPoint = MEM_mallocN(sData->total_points*sizeof(PaintWavePoint), "Temp previous points for wave simulation"); + if (!prevPoint) return; + + /* calculate average neigh distance (single thread) */ + for (index = 0; index < sData->total_points; index++) + { + int i; + int numOfNeighs = sData->adj_data->n_num[index]; + + for (i=0; i<numOfNeighs; i++) { + average_dist += bNeighs[sData->adj_data->n_index[index]+i].dist; + } + } + average_dist /= sData->adj_data->total_targets; + + /* determine number of required steps */ + steps = ceil((WAVE_TIME_FAC*timescale*surface->wave_timescale) / (average_dist/wave_speed/3)); + CLAMP(steps, 1, 15); + timescale /= steps; + + /* apply simulation values for final timescale */ + dt = WAVE_TIME_FAC*timescale*surface->wave_timescale; + min_dist = wave_speed*dt*1.5f; + damp_factor = pow((1.0f-surface->wave_damping), timescale*surface->wave_timescale); + + for (ss=0; ss<steps; ss++) { + + /* copy previous frame data */ + memcpy(prevPoint, sData->type_data, sData->total_points*sizeof(PaintWavePoint)); + + #pragma omp parallel for schedule(static) + for (index = 0; index < sData->total_points; index++) { + PaintWavePoint *wPoint = &((PaintWavePoint*)sData->type_data)[index]; + int numOfNeighs = sData->adj_data->n_num[index]; + float force = 0.0f, avg_dist = 0.0f, avg_height = 0.0f; + int numOfN = 0, numOfRN = 0; + int i; + + if (wPoint->state) continue; + + /* calculate force from surrounding points */ + for (i=0; i<numOfNeighs; i++) { + int n_index = sData->adj_data->n_index[index]+i; + float dist = bNeighs[n_index].dist; + PaintWavePoint *tPoint = &prevPoint[sData->adj_data->n_target[n_index]]; + + if (!dist || tPoint->state>0) continue; + if (dist<min_dist) dist=min_dist; + avg_dist += dist; + numOfN++; + + /* count average height for edge points for open borders */ + if (!(sData->adj_data->flags[sData->adj_data->n_target[n_index]] & ADJ_ON_MESH_EDGE)) { + avg_height += tPoint->height; + numOfRN++; + } + + force += (tPoint->height - wPoint->height) / (dist*dist); + } + avg_dist = (numOfN) ? avg_dist/numOfN : 0.0f; + + if (surface->flags & MOD_DPAINT_WAVE_OPEN_BORDERS && + sData->adj_data->flags[index] & ADJ_ON_MESH_EDGE) { + /* if open borders, apply a fake height to keep waves going on */ + avg_height = (numOfRN) ? avg_height/numOfRN : 0.0f; + wPoint->height = (dt*wave_speed*avg_height + wPoint->height*avg_dist) / (avg_dist + dt*wave_speed); + } + /* else do wave eq */ + else { + /* add force towards zero height based on average dist */ + if (avg_dist) + force += (0.0f - wPoint->height) * surface->wave_spring / (avg_dist*avg_dist) / 2.0f; + + /* change point velocity */ + wPoint->velocity += force*dt * wave_speed*wave_speed; + /* damping */ + wPoint->velocity *= damp_factor; + /* and new height */ + wPoint->height += wPoint->velocity*dt; + } + } + } + + /* reset state */ + #pragma omp parallel for schedule(static) + for (index = 0; index < sData->total_points; index++) { + PaintWavePoint *wPoint = &((PaintWavePoint*)sData->type_data)[index]; + wPoint->state = DPAINT_WAVE_NONE; + } + + MEM_freeN(prevPoint); +} + +/* Do dissolve and fading effects */ +static void dynamicPaint_surfacePreStep(DynamicPaintSurface *surface, float timescale) +{ + PaintSurfaceData *sData = surface->data; + int index; + + #pragma omp parallel for schedule(static) + for (index=0; index<sData->total_points; index++) + { + /* Do drying dissolve effects */ + if (surface->type == MOD_DPAINT_SURFACE_T_PAINT) { + PaintPoint *pPoint = &((PaintPoint*)sData->type_data)[index]; + /* drying */ + if (pPoint->wetness >= MIN_WETNESS) { + int i; + float dry_ratio, f_color[4]; + float p_wetness = pPoint->wetness; + VALUE_DISSOLVE(pPoint->wetness, surface->dry_speed, timescale, (surface->flags & MOD_DPAINT_DRY_LOG)); + if (pPoint->wetness<0.0f) pPoint->wetness=0.0f; + dry_ratio = pPoint->wetness/p_wetness; + + /* + * Slowly "shift" paint from wet layer to dry layer as it drys: + */ + /* make sure alpha values are within proper range */ + CLAMP(pPoint->alpha, 0.0f, 1.0f); + CLAMP(pPoint->e_alpha, 0.0f, 1.0f); + + /* get current final blended color of these layers */ + blendColors(pPoint->color, pPoint->alpha, pPoint->e_color, pPoint->e_alpha, f_color); + /* reduce wet layer alpha by dry factor */ + pPoint->e_alpha *= dry_ratio; + + /* now calculate new alpha for dry layer that keeps final blended color unchanged */ + pPoint->alpha = (f_color[3] - pPoint->e_alpha)/(1.0f-pPoint->e_alpha); + /* for each rgb component, calculate a new dry layer color that keeps the final blend color + * with these new alpha values. (wet layer color doesnt change)*/ + if (pPoint->alpha) { + for (i=0; i<3; i++) { + pPoint->color[i] = (f_color[i]*f_color[3] - pPoint->e_color[i]*pPoint->e_alpha)/(pPoint->alpha*(1.0f-pPoint->e_alpha)); + } + } + + pPoint->state = DPAINT_PAINT_WET; + } + /* in case of just dryed paint, just mix it to the dry layer and mark it empty */ + else if (pPoint->state > 0) { + float f_color[4]; + blendColors(pPoint->color, pPoint->alpha, pPoint->e_color, pPoint->e_alpha, f_color); + copy_v3_v3(pPoint->color, f_color); + pPoint->alpha = f_color[3]; + /* clear wet layer */ + pPoint->wetness = 0.0f; + pPoint->e_alpha = 0.0f; + pPoint->state = DPAINT_PAINT_DRY; + } + + if (surface->flags & MOD_DPAINT_DISSOLVE) { + VALUE_DISSOLVE(pPoint->alpha, surface->diss_speed, timescale, (surface->flags & MOD_DPAINT_DISSOLVE_LOG)); + if (pPoint->alpha < 0.0f) pPoint->alpha = 0.0f; + + VALUE_DISSOLVE(pPoint->e_alpha, surface->diss_speed, timescale, (surface->flags & MOD_DPAINT_DISSOLVE_LOG)); + if (pPoint->e_alpha < 0.0f) pPoint->e_alpha = 0.0f; + } + } + /* dissolve for float types */ + else if (surface->flags & MOD_DPAINT_DISSOLVE && + (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE || + surface->type == MOD_DPAINT_SURFACE_T_WEIGHT)) { + + float *point = &((float*)sData->type_data)[index]; + /* log or linear */ + VALUE_DISSOLVE(*point, surface->diss_speed, timescale, (surface->flags & MOD_DPAINT_DISSOLVE_LOG)); + if (*point < 0.0f) *point = 0.0f; + } + } +} + +static int dynamicPaint_surfaceHasMoved(DynamicPaintSurface *surface, Object *ob) +{ + PaintSurfaceData *sData = surface->data; + PaintBakeData *bData = sData->bData; + DerivedMesh *dm = surface->canvas->dm; + MVert *mvert = dm->getVertArray(dm); + + int numOfVerts = dm->getNumVerts(dm); + int i; + int ret = 0; + + if (!bData->prev_verts) return 1; + + /* matrix comparison */ + for (i=0; i<4; i++) { + int j; + for (j=0; j<4; j++) + if (bData->prev_obmat[i][j] != ob->obmat[i][j]) return 1; + } + + /* vertices */ + #pragma omp parallel for schedule(static) + for (i=0; i<numOfVerts; i++) { + int j; + for (j=0; j<3; j++) + if (bData->prev_verts[i].co[j] != mvert[i].co[j]) { + ret = 1; + break; + } + } + + return ret; +} + +static int surface_needsVelocityData(DynamicPaintSurface *surface, Scene *scene, Object *ob) +{ + if (surface->effect & MOD_DPAINT_EFFECT_DO_DRIP) + return 1; + + if (surface_getBrushFlags(surface, scene, ob) & BRUSH_USES_VELOCITY) + return 1; + + return 0; +} + +static int surface_needsAccelerationData(DynamicPaintSurface *surface) +{ + if (surface->effect & MOD_DPAINT_EFFECT_DO_DRIP) + return 1; + + return 0; +} + +/* Prepare for surface step by creating PaintBakeNormal data */ +static int dynamicPaint_generateBakeData(DynamicPaintSurface *surface, Scene *scene, Object *ob) +{ + PaintSurfaceData *sData = surface->data; + PaintAdjData *adj_data = sData->adj_data; + PaintBakeData *bData = sData->bData; + DerivedMesh *dm = surface->canvas->dm; + int index, new_bdata = 0; + int do_velocity_data = surface_needsVelocityData(surface, scene, ob); + int do_accel_data = surface_needsAccelerationData(surface); + + int canvasNumOfVerts = dm->getNumVerts(dm); + MVert *mvert = dm->getVertArray(dm); + Vec3f *canvas_verts; + + if (bData) { + int surface_moved = dynamicPaint_surfaceHasMoved(surface, ob); + + /* get previous speed for accelertaion */ + if (do_accel_data && bData->prev_velocity && bData->velocity) + memcpy(bData->prev_velocity, bData->velocity, sData->total_points*sizeof(Vec3f)); + + /* reset speed vectors */ + if (do_velocity_data && bData->velocity && (bData->clear || !surface_moved)) + memset(bData->velocity, 0, sData->total_points*sizeof(Vec3f)); + + /* if previous data exists and mesh hasn't moved, no need to recalc */ + if (!surface_moved) + return 1; + } + + canvas_verts = (struct Vec3f *) MEM_mallocN(canvasNumOfVerts*sizeof(struct Vec3f), "Dynamic Paint transformed canvas verts"); + if (!canvas_verts) return 0; + + /* allocate memory if required */ + if (!bData) { + sData->bData = bData = (struct PaintBakeData *) MEM_callocN(sizeof(struct PaintBakeData), "Dynamic Paint bake data"); + if (!bData) { + if (canvas_verts) MEM_freeN(canvas_verts); + return 0; + } + + /* Init bdata */ + bData->bNormal = (struct PaintBakeNormal *) MEM_mallocN(sData->total_points*sizeof(struct PaintBakeNormal), "Dynamic Paint step data"); + bData->s_pos = MEM_mallocN(sData->total_points*sizeof(unsigned int), "Dynamic Paint bData s_pos"); + bData->s_num = MEM_mallocN(sData->total_points*sizeof(unsigned int), "Dynamic Paint bData s_num"); + bData->realCoord = (struct Vec3f *) MEM_mallocN(surface_totalSamples(surface)*sizeof(Vec3f), "Dynamic Paint point coords"); + bData->prev_verts = MEM_mallocN(canvasNumOfVerts*sizeof(MVert), "Dynamic Paint bData prev_verts"); + + /* if any allocation failed, free everything */ + if (!bData->bNormal || !bData->s_pos || !bData->s_num || !bData->realCoord || !canvas_verts) { + if (bData->bNormal) MEM_freeN(bData->bNormal); + if (bData->s_pos) MEM_freeN(bData->s_pos); + if (bData->s_num) MEM_freeN(bData->s_num); + if (bData->realCoord) MEM_freeN(bData->realCoord); + if (canvas_verts) MEM_freeN(canvas_verts); + + return setError(surface->canvas, "Not enough free memory."); + } + + new_bdata = 1; + } + + if (do_velocity_data && !bData->velocity) { + bData->velocity = (struct Vec3f *) MEM_callocN(sData->total_points*sizeof(Vec3f), "Dynamic Paint velocity"); + } + if (do_accel_data && !bData->prev_velocity) { + bData->prev_velocity = (struct Vec3f *) MEM_mallocN(sData->total_points*sizeof(Vec3f), "Dynamic Paint prev velocity"); + /* copy previous vel */ + if (bData->prev_velocity && bData->velocity) + memcpy(bData->prev_velocity, bData->velocity, sData->total_points*sizeof(Vec3f)); + } + + /* + * Make a transformed copy of canvas derived mesh vertices to avoid recalculation. + */ + #pragma omp parallel for schedule(static) + for (index=0; index<canvasNumOfVerts; index++) { + copy_v3_v3(canvas_verts[index].v, mvert[index].co); + mul_m4_v3(ob->obmat, canvas_verts[index].v); + } + + /* + * Prepare each surface point for a new step + */ + #pragma omp parallel for schedule(static) + for (index=0; index<sData->total_points; index++) + { + float prev_point[3]; + if (do_velocity_data && !new_bdata) { + copy_v3_v3(prev_point, bData->realCoord[bData->s_pos[index]].v); + } + /* + * Calculate current 3D-position and normal of each surface point + */ + if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ) { + float n1[3], n2[3], n3[3]; + ImgSeqFormatData *f_data = (ImgSeqFormatData*)sData->format_data; + PaintUVPoint *tPoint = &((PaintUVPoint*)f_data->uv_p)[index]; + int ss; + + bData->s_num[index] = (surface->flags & MOD_DPAINT_ANTIALIAS) ? 5 : 1; + bData->s_pos[index] = index * bData->s_num[index]; + + /* per sample coordinates */ + for (ss=0; ss<bData->s_num[index]; ss++) { + interp_v3_v3v3v3( bData->realCoord[bData->s_pos[index]+ss].v, + canvas_verts[tPoint->v1].v, + canvas_verts[tPoint->v2].v, + canvas_verts[tPoint->v3].v, f_data->barycentricWeights[index*bData->s_num[index]+ss].v); + } + + /* Calculate current pixel surface normal */ + normal_short_to_float_v3(n1, mvert[tPoint->v1].no); + normal_short_to_float_v3(n2, mvert[tPoint->v2].no); + normal_short_to_float_v3(n3, mvert[tPoint->v3].no); + + interp_v3_v3v3v3( bData->bNormal[index].invNorm, + n1, n2, n3, f_data->barycentricWeights[index*bData->s_num[index]].v); + mul_mat3_m4_v3(ob->obmat, bData->bNormal[index].invNorm); + normalize_v3(bData->bNormal[index].invNorm); + negate_v3(bData->bNormal[index].invNorm); + } + else if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) { + int ss; + if (surface->flags & MOD_DPAINT_ANTIALIAS && adj_data) { + bData->s_num[index] = adj_data->n_num[index]+1; + bData->s_pos[index] = adj_data->n_index[index]+index; + } + else { + bData->s_num[index] = 1; + bData->s_pos[index] = index; + } + + /* calculate position for each sample */ + for (ss=0; ss<bData->s_num[index]; ss++) { + /* first sample is always point center */ + copy_v3_v3(bData->realCoord[bData->s_pos[index]+ss].v, canvas_verts[index].v); + if (ss > 0) { + int t_index = adj_data->n_index[index]+(ss-1); + /* get vertex position at 1/3 of each neigh edge */ + mul_v3_fl(bData->realCoord[bData->s_pos[index]+ss].v, 2.0f/3.0f); + madd_v3_v3fl(bData->realCoord[bData->s_pos[index]+ss].v, canvas_verts[adj_data->n_target[t_index]].v, 1.0f/3.0f); + } + } + + /* normal */ + normal_short_to_float_v3(bData->bNormal[index].invNorm, mvert[index].no); + mul_mat3_m4_v3(ob->obmat, bData->bNormal[index].invNorm); + normalize_v3(bData->bNormal[index].invNorm); + negate_v3(bData->bNormal[index].invNorm); + } + + /* Prepare surface normal directional scale to easily convert + * brush intersection amount between global and local space */ + if (surface->type == MOD_DPAINT_SURFACE_T_DISPLACE || + surface->type == MOD_DPAINT_SURFACE_T_WAVE) { + float temp_nor[3]; + if (surface->format == MOD_DPAINT_SURFACE_F_VERTEX) { + normal_short_to_float_v3(temp_nor, mvert[index].no); + normalize_v3(temp_nor); + } + else { + float n1[3], n2[3], n3[3]; + ImgSeqFormatData *f_data = (ImgSeqFormatData*)sData->format_data; + PaintUVPoint *tPoint = &((PaintUVPoint*)f_data->uv_p)[index]; + + normal_short_to_float_v3(n1, mvert[tPoint->v1].no); + normal_short_to_float_v3(n2, mvert[tPoint->v2].no); + normal_short_to_float_v3(n3, mvert[tPoint->v3].no); + interp_v3_v3v3v3(temp_nor, + n1, n2, n3, f_data->barycentricWeights[index*bData->s_num[index]].v); + } + + mul_v3_v3(temp_nor, ob->size); + bData->bNormal[index].normal_scale = len_v3(temp_nor); + } + + /* calculate speed vector */ + if (do_velocity_data && !new_bdata && !bData->clear) { + sub_v3_v3v3(bData->velocity[index].v, bData->realCoord[bData->s_pos[index]].v, prev_point); + } + } + + MEM_freeN(canvas_verts); + + /* generate surface space partitioning grid */ + surfaceGenerateGrid(surface); + /* calculate current frame neighbouring point distances and global dirs */ + dynamicPaint_prepareNeighbourData(surface, 0); + + /* Copy current frame vertices to check against in next frame */ + copy_m4_m4(bData->prev_obmat, ob->obmat); + memcpy(bData->prev_verts, mvert, canvasNumOfVerts*sizeof(MVert)); + + bData->clear = 0; + + return 1; +} + +/* +* Do Dynamic Paint step. Paints scene brush objects of current state/frame to the surface. +*/ +static int dynamicPaint_doStep(Scene *scene, Object *ob, DynamicPaintSurface *surface, float timescale, float subframe) +{ + PaintSurfaceData *sData = surface->data; + PaintBakeData *bData = sData->bData; + DynamicPaintCanvasSettings *canvas = surface->canvas; + int ret = 1; + if (!sData || sData->total_points < 1) return 0; + + dynamicPaint_surfacePreStep(surface, timescale); + /* + * Loop through surface's target paint objects and do painting + */ + { + Base *base = NULL; + GroupObject *go = NULL; + Object *brushObj = NULL; + ModifierData *md = NULL; + + /* backup current scene frame */ + int scene_frame = scene->r.cfra; + float scene_subframe = scene->r.subframe; + + /* either from group or from all objects */ + if(surface->brush_group) + go = surface->brush_group->gobject.first; + else + base = scene->base.first; + + while (base || go) + { + brushObj = NULL; + /* select object */ + if(surface->brush_group) { + if(go->ob) brushObj = go->ob; + } + else + brushObj = base->object; + + if(!brushObj) { + /* skip item */ + if(surface->brush_group) go = go->next; + else base= base->next; + continue; + } + + /* next item */ + if(surface->brush_group) + go = go->next; + else + base= base->next; + + /* check if target has an active dp modifier */ + md = modifiers_findByType(brushObj, eModifierType_DynamicPaint); + if(md && md->mode & (eModifierMode_Realtime | eModifierMode_Render)) + { + DynamicPaintModifierData *pmd2 = (DynamicPaintModifierData *)md; + /* make sure we're dealing with a brush */ + if (pmd2->brush) + { + DynamicPaintBrushSettings *brush = pmd2->brush; + BrushMaterials bMats = {0}; + + /* calculate brush speed vectors if required */ + if (brush->flags & MOD_DPAINT_DO_SMUDGE) { + bData->brush_velocity = MEM_callocN(sData->total_points*sizeof(float)*4, "Dynamic Paint brush velocity"); + /* init adjacency data if not already */ + if (!sData->adj_data) + dynamicPaint_initAdjacencyData(surface, 1); + if (!bData->bNeighs) + dynamicPaint_prepareNeighbourData(surface, 1); + } + + /* update object data on this subframe */ + if (subframe) { + scene_setSubframe(scene, subframe); + subframe_updateObject(scene, brushObj, UPDATE_EVERYTHING, BKE_curframe(scene)); + } + /* Prepare materials if required */ + if (brush->flags & MOD_DPAINT_USE_MATERIAL) + dynamicPaint_updateBrushMaterials(brushObj, brush->mat, scene, &bMats); + + /* Apply brush on the surface depending on it's collision type */ + /* Particle brush: */ + if (brush->collision == MOD_DPAINT_COL_PSYS) { + if (brush && brush->psys && brush->psys->part && brush->psys->part->type==PART_EMITTER && + psys_check_enabled(brushObj, brush->psys)) { + + /* Paint a particle system */ + BKE_animsys_evaluate_animdata(scene, &brush->psys->part->id, brush->psys->part->adt, BKE_curframe(scene), ADT_RECALC_ANIM); + dynamicPaint_paintParticles(surface, brush->psys, brush, ob, timescale); + } + } + /* Object center distance: */ + else if (brush->collision == MOD_DPAINT_COL_POINT && brushObj != ob) { + dynamicPaint_paintSinglePoint(surface, brushObj->loc, brush, ob, brushObj, &bMats, scene, timescale); + } + /* Mesh volume/proximity: */ + else if (brushObj != ob) { + dynamicPaint_paintMesh(surface, brush, ob, brushObj, &bMats, scene, timescale); + } + + /* free temp material data */ + if (brush->flags & MOD_DPAINT_USE_MATERIAL) + dynamicPaint_freeBrushMaterials(&bMats); + /* reset object to it's original state */ + if (subframe) { + scene->r.cfra = scene_frame; + scene->r.subframe = scene_subframe; + subframe_updateObject(scene, brushObj, UPDATE_EVERYTHING, BKE_curframe(scene)); + } + + /* process special brush effects, like smudge */ + if (bData->brush_velocity) { + if (brush->flags & MOD_DPAINT_DO_SMUDGE) + dynamicPaint_doSmudge(surface, brush, timescale); + MEM_freeN(bData->brush_velocity); + bData->brush_velocity = NULL; + } + } + } + } + } + + /* surfaces operations that use adjacency data */ + if (sData->adj_data && bData->bNeighs) + { + /* wave type surface simulation step */ + if (surface->type == MOD_DPAINT_SURFACE_T_WAVE) { + dynamicPaint_doWaveStep(surface, timescale); + } + + /* paint surface effects */ + if (surface->effect && surface->type == MOD_DPAINT_SURFACE_T_PAINT) + { + int steps = 1, s; + PaintPoint *prevPoint; + float *force = NULL; + + /* Allocate memory for surface previous points to read unchanged values from */ + prevPoint = MEM_mallocN(sData->total_points*sizeof(struct PaintPoint), "PaintSurfaceDataCopy"); + if (!prevPoint) + return setError(canvas, "Not enough free memory."); + + /* Prepare effects and get number of required steps */ + steps = dynamicPaint_prepareEffectStep(surface, scene, ob, &force, timescale); + for (s = 0; s < steps; s++) { + dynamicPaint_doEffectStep(surface, force, prevPoint, timescale, (float)steps); + } + + /* Free temporary effect data */ + if (prevPoint) MEM_freeN(prevPoint); + if (force) MEM_freeN(force); + } + } + + return ret; +} + +/* +* Calculate a single frame and included subframes for surface +*/ +int dynamicPaint_calculateFrame(DynamicPaintSurface *surface, Scene *scene, Object *cObject, int frame) +{ + float timescale = 1.0f; + + /* apply previous displace on derivedmesh if incremental surface */ + if (surface->flags & MOD_DPAINT_DISP_INCREMENTAL) + dynamicPaint_applySurfaceDisplace(surface, surface->canvas->dm, 0); + + /* update bake data */ + dynamicPaint_generateBakeData(surface, scene, cObject); + + /* dont do substeps for first frame */ + if (surface->substeps && (frame != surface->start_frame)) { + int st; + timescale = 1.0f / (surface->substeps+1); + + for (st = 1; st <= surface->substeps; st++) { + float subframe = ((float) st) / (surface->substeps+1); + if (!dynamicPaint_doStep(scene, cObject, surface, timescale, subframe)) return 0; + } + } + + return dynamicPaint_doStep(scene, cObject, surface, timescale, 0.0f); +}
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