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|
/*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2008, Blender Foundation
* This is a new part of Blender
*/
/** \file
* \ingroup bke
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stddef.h>
#include <math.h>
#include "CLG_log.h"
#include "MEM_guardedalloc.h"
#include "BLI_blenlib.h"
#include "BLI_utildefines.h"
#include "BLI_math_vector.h"
#include "BLI_polyfill_2d.h"
#include "BLI_string_utils.h"
#include "BLT_translation.h"
#include "IMB_imbuf_types.h"
#include "IMB_imbuf.h"
#include "DNA_anim_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_material_types.h"
#include "DNA_gpencil_types.h"
#include "DNA_userdef_types.h"
#include "DNA_scene_types.h"
#include "DNA_space_types.h"
#include "DNA_object_types.h"
#include "BKE_action.h"
#include "BKE_animsys.h"
#include "BKE_curve.h"
#include "BKE_collection.h"
#include "BKE_colortools.h"
#include "BKE_deform.h"
#include "BKE_gpencil.h"
#include "BKE_icons.h"
#include "BKE_image.h"
#include "BKE_library.h"
#include "BKE_main.h"
#include "BKE_material.h"
#include "BKE_object.h"
#include "BKE_paint.h"
#include "BLI_math_color.h"
#include "DEG_depsgraph.h"
#include "DEG_depsgraph_query.h"
static CLG_LogRef LOG = {"bke.gpencil"};
/* ************************************************** */
/* Draw Engine */
void (*BKE_gpencil_batch_cache_dirty_tag_cb)(bGPdata *gpd) = NULL;
void (*BKE_gpencil_batch_cache_free_cb)(bGPdata *gpd) = NULL;
void BKE_gpencil_batch_cache_dirty_tag(bGPdata *gpd)
{
if (gpd) {
DEG_id_tag_update(&gpd->id, ID_RECALC_GEOMETRY);
BKE_gpencil_batch_cache_dirty_tag_cb(gpd);
}
}
void BKE_gpencil_batch_cache_free(bGPdata *gpd)
{
if (gpd) {
BKE_gpencil_batch_cache_free_cb(gpd);
}
}
/* ************************************************** */
/* Memory Management */
/* clean vertex groups weights */
void BKE_gpencil_free_point_weights(MDeformVert *dvert)
{
if (dvert == NULL) {
return;
}
MEM_SAFE_FREE(dvert->dw);
}
void BKE_gpencil_free_stroke_weights(bGPDstroke *gps)
{
if (gps == NULL) {
return;
}
if (gps->dvert == NULL) {
return;
}
for (int i = 0; i < gps->totpoints; i++) {
MDeformVert *dvert = &gps->dvert[i];
BKE_gpencil_free_point_weights(dvert);
}
}
/* free stroke, doesn't unlink from any listbase */
void BKE_gpencil_free_stroke(bGPDstroke *gps)
{
if (gps == NULL) {
return;
}
/* free stroke memory arrays, then stroke itself */
if (gps->points) {
MEM_freeN(gps->points);
}
if (gps->dvert) {
BKE_gpencil_free_stroke_weights(gps);
MEM_freeN(gps->dvert);
}
if (gps->triangles) {
MEM_freeN(gps->triangles);
}
MEM_freeN(gps);
}
/* Free strokes belonging to a gp-frame */
bool BKE_gpencil_free_strokes(bGPDframe *gpf)
{
bGPDstroke *gps_next;
bool changed = (BLI_listbase_is_empty(&gpf->strokes) == false);
/* free strokes */
for (bGPDstroke *gps = gpf->strokes.first; gps; gps = gps_next) {
gps_next = gps->next;
BKE_gpencil_free_stroke(gps);
}
BLI_listbase_clear(&gpf->strokes);
return changed;
}
/* Free all of a gp-layer's frames */
void BKE_gpencil_free_frames(bGPDlayer *gpl)
{
bGPDframe *gpf_next;
/* error checking */
if (gpl == NULL) {
return;
}
/* free frames */
for (bGPDframe *gpf = gpl->frames.first; gpf; gpf = gpf_next) {
gpf_next = gpf->next;
/* free strokes and their associated memory */
BKE_gpencil_free_strokes(gpf);
BLI_freelinkN(&gpl->frames, gpf);
}
gpl->actframe = NULL;
}
/* Free all of the gp-layers for a viewport (list should be &gpd->layers or so) */
void BKE_gpencil_free_layers(ListBase *list)
{
bGPDlayer *gpl_next;
/* error checking */
if (list == NULL) {
return;
}
/* delete layers */
for (bGPDlayer *gpl = list->first; gpl; gpl = gpl_next) {
gpl_next = gpl->next;
/* free layers and their data */
BKE_gpencil_free_frames(gpl);
BLI_freelinkN(list, gpl);
}
}
/** Free (or release) any data used by this grease pencil (does not free the gpencil itself). */
void BKE_gpencil_free(bGPdata *gpd, bool free_all)
{
/* clear animation data */
BKE_animdata_free(&gpd->id, false);
/* free layers */
BKE_gpencil_free_layers(&gpd->layers);
/* materials */
MEM_SAFE_FREE(gpd->mat);
/* free all data */
if (free_all) {
/* clear cache */
BKE_gpencil_batch_cache_free(gpd);
}
}
void BKE_gpencil_eval_delete(bGPdata *gpd_eval)
{
BKE_gpencil_free(gpd_eval, true);
BKE_libblock_free_data(&gpd_eval->id, false);
MEM_freeN(gpd_eval);
}
/* ************************************************** */
/* Container Creation */
/* add a new gp-frame to the given layer */
bGPDframe *BKE_gpencil_frame_addnew(bGPDlayer *gpl, int cframe)
{
bGPDframe *gpf = NULL, *gf = NULL;
short state = 0;
/* error checking */
if (gpl == NULL) {
return NULL;
}
/* allocate memory for this frame */
gpf = MEM_callocN(sizeof(bGPDframe), "bGPDframe");
gpf->framenum = cframe;
/* find appropriate place to add frame */
if (gpl->frames.first) {
for (gf = gpl->frames.first; gf; gf = gf->next) {
/* check if frame matches one that is supposed to be added */
if (gf->framenum == cframe) {
state = -1;
break;
}
/* if current frame has already exceeded the frame to add, add before */
if (gf->framenum > cframe) {
BLI_insertlinkbefore(&gpl->frames, gf, gpf);
state = 1;
break;
}
}
}
/* check whether frame was added successfully */
if (state == -1) {
CLOG_ERROR(
&LOG, "Frame (%d) existed already for this layer_active. Using existing frame", cframe);
/* free the newly created one, and use the old one instead */
MEM_freeN(gpf);
/* return existing frame instead... */
BLI_assert(gf != NULL);
gpf = gf;
}
else if (state == 0) {
/* add to end then! */
BLI_addtail(&gpl->frames, gpf);
}
/* return frame */
return gpf;
}
/* add a copy of the active gp-frame to the given layer */
bGPDframe *BKE_gpencil_frame_addcopy(bGPDlayer *gpl, int cframe)
{
bGPDframe *new_frame;
bool found = false;
/* Error checking/handling */
if (gpl == NULL) {
/* no layer */
return NULL;
}
else if (gpl->actframe == NULL) {
/* no active frame, so just create a new one from scratch */
return BKE_gpencil_frame_addnew(gpl, cframe);
}
/* Create a copy of the frame */
new_frame = BKE_gpencil_frame_duplicate(gpl->actframe);
/* Find frame to insert it before */
LISTBASE_FOREACH (bGPDframe *, gpf, &gpl->frames) {
if (gpf->framenum > cframe) {
/* Add it here */
BLI_insertlinkbefore(&gpl->frames, gpf, new_frame);
found = true;
break;
}
else if (gpf->framenum == cframe) {
/* This only happens when we're editing with framelock on...
* - Delete the new frame and don't do anything else here...
*/
BKE_gpencil_free_strokes(new_frame);
MEM_freeN(new_frame);
new_frame = NULL;
found = true;
break;
}
}
if (found == false) {
/* Add new frame to the end */
BLI_addtail(&gpl->frames, new_frame);
}
/* Ensure that frame is set up correctly, and return it */
if (new_frame) {
new_frame->framenum = cframe;
gpl->actframe = new_frame;
}
return new_frame;
}
/* add a new gp-layer and make it the active layer */
bGPDlayer *BKE_gpencil_layer_addnew(bGPdata *gpd, const char *name, bool setactive)
{
bGPDlayer *gpl = NULL;
bGPDlayer *gpl_active = NULL;
/* check that list is ok */
if (gpd == NULL) {
return NULL;
}
/* allocate memory for frame and add to end of list */
gpl = MEM_callocN(sizeof(bGPDlayer), "bGPDlayer");
gpl_active = BKE_gpencil_layer_active_get(gpd);
/* add to datablock */
if (gpl_active == NULL) {
BLI_addtail(&gpd->layers, gpl);
}
else {
/* if active layer, add after that layer */
BLI_insertlinkafter(&gpd->layers, gpl_active, gpl);
}
/* annotation vs GP Object behavior is slightly different */
if (gpd->flag & GP_DATA_ANNOTATIONS) {
/* set default color of new strokes for this layer */
copy_v4_v4(gpl->color, U.gpencil_new_layer_col);
gpl->opacity = 1.0f;
/* set default thickness of new strokes for this layer */
gpl->thickness = 3;
/* Onion colors */
ARRAY_SET_ITEMS(gpl->gcolor_prev, 0.302f, 0.851f, 0.302f);
ARRAY_SET_ITEMS(gpl->gcolor_next, 0.250f, 0.1f, 1.0f);
}
else {
/* thickness parameter represents "thickness change", not absolute thickness */
gpl->thickness = 0;
gpl->opacity = 1.0f;
/* default channel color */
ARRAY_SET_ITEMS(gpl->color, 0.2f, 0.2f, 0.2f);
/* Default vertex mix. */
gpl->vertex_paint_opacity = 1.0f;
}
/* auto-name */
BLI_strncpy(gpl->info, name, sizeof(gpl->info));
BLI_uniquename(&gpd->layers,
gpl,
(gpd->flag & GP_DATA_ANNOTATIONS) ? DATA_("Note") : DATA_("GP_Layer"),
'.',
offsetof(bGPDlayer, info),
sizeof(gpl->info));
/* Enable always affected by scene lights. */
gpl->flag |= GP_LAYER_USE_LIGHTS;
gpl->mask_layer[0] = '\0';
/* make this one the active one */
if (setactive) {
BKE_gpencil_layer_active_set(gpd, gpl);
}
/* return layer */
return gpl;
}
/* add a new gp-datablock */
bGPdata *BKE_gpencil_data_addnew(Main *bmain, const char name[])
{
bGPdata *gpd;
/* allocate memory for a new block */
gpd = BKE_libblock_alloc(bmain, ID_GD, name, 0);
/* initial settings */
gpd->flag = (GP_DATA_DISPINFO | GP_DATA_EXPAND);
/* general flags */
gpd->flag |= GP_DATA_VIEWALIGN;
/* always enable object onion skin switch */
gpd->flag |= GP_DATA_SHOW_ONIONSKINS;
/* GP object specific settings */
ARRAY_SET_ITEMS(gpd->line_color, 0.6f, 0.6f, 0.6f, 0.5f);
gpd->pixfactor = GP_DEFAULT_PIX_FACTOR;
/* grid settings */
ARRAY_SET_ITEMS(gpd->grid.color, 0.5f, 0.5f, 0.5f); /* Color */
ARRAY_SET_ITEMS(gpd->grid.scale, 1.0f, 1.0f); /* Scale */
gpd->grid.lines = GP_DEFAULT_GRID_LINES; /* Number of lines */
/* onion-skinning settings (datablock level) */
gpd->onion_flag |= (GP_ONION_GHOST_PREVCOL | GP_ONION_GHOST_NEXTCOL);
gpd->onion_flag |= GP_ONION_FADE;
gpd->onion_mode = GP_ONION_MODE_RELATIVE;
gpd->onion_factor = 0.5f;
ARRAY_SET_ITEMS(gpd->gcolor_prev, 0.145098f, 0.419608f, 0.137255f); /* green */
ARRAY_SET_ITEMS(gpd->gcolor_next, 0.125490f, 0.082353f, 0.529412f); /* blue */
gpd->gstep = 1;
gpd->gstep_next = 1;
return gpd;
}
/* ************************************************** */
/* Primitive Creation */
/* Utilities for easier bulk-creation of geometry */
/**
* Populate stroke with point data from data buffers
*
* \param array: Flat array of point data values. Each entry has GP_PRIM_DATABUF_SIZE values
* \param mat: 4x4 transform matrix to transform points into the right coordinate space
*/
void BKE_gpencil_stroke_add_points(bGPDstroke *gps,
const float *array,
const int totpoints,
const float mat[4][4])
{
for (int i = 0; i < totpoints; i++) {
bGPDspoint *pt = &gps->points[i];
const int x = GP_PRIM_DATABUF_SIZE * i;
pt->x = array[x];
pt->y = array[x + 1];
pt->z = array[x + 2];
mul_m4_v3(mat, &pt->x);
pt->pressure = array[x + 3];
pt->strength = array[x + 4];
}
}
/* Create a new stroke, with pre-allocated data buffers. */
bGPDstroke *BKE_gpencil_stroke_new(int mat_idx, int totpoints, short thickness)
{
/* allocate memory for a new stroke */
bGPDstroke *gps = MEM_callocN(sizeof(bGPDstroke), "gp_stroke");
gps->thickness = thickness;
gps->fill_opacity_fac = 1.0f;
gps->gradient_f = 1.0f;
gps->gradient_s[0] = 1.0f;
gps->gradient_s[1] = 1.0f;
gps->uv_scale = 1.0f;
gps->inittime = 0;
gps->flag = GP_STROKE_3DSPACE;
gps->totpoints = totpoints;
gps->points = MEM_callocN(sizeof(bGPDspoint) * gps->totpoints, "gp_stroke_points");
/* initialize triangle memory to dummy data */
gps->triangles = NULL;
gps->tot_triangles = 0;
gps->mat_nr = mat_idx;
return gps;
}
/* Create a new stroke and add to frame. */
bGPDstroke *BKE_gpencil_stroke_add(
bGPDframe *gpf, int mat_idx, int totpoints, short thickness, const bool insert_at_head)
{
bGPDstroke *gps = BKE_gpencil_stroke_new(mat_idx, totpoints, thickness);
/* Add to frame. */
if ((gps != NULL) && (gpf != NULL)) {
if (!insert_at_head) {
BLI_addtail(&gpf->strokes, gps);
}
else {
BLI_addhead(&gpf->strokes, gps);
}
}
return gps;
}
/* Add a stroke and copy the temporary drawing color value from one of the existing stroke */
bGPDstroke *BKE_gpencil_stroke_add_existing_style(
bGPDframe *gpf, bGPDstroke *existing, int mat_idx, int totpoints, short thickness)
{
bGPDstroke *gps = BKE_gpencil_stroke_add(gpf, mat_idx, totpoints, thickness, false);
/* Copy run-time color data so that strokes added in the modifier has the style.
* There are depsgraph reference pointers inside,
* change the copy function if interfere with future drawing implementation. */
memcpy(&gps->runtime, &existing->runtime, sizeof(bGPDstroke_Runtime));
return gps;
}
/* ************************************************** */
/* Data Duplication */
/* make a copy of a given gpencil weights */
void BKE_gpencil_stroke_weights_duplicate(bGPDstroke *gps_src, bGPDstroke *gps_dst)
{
if (gps_src == NULL) {
return;
}
BLI_assert(gps_src->totpoints == gps_dst->totpoints);
BKE_defvert_array_copy(gps_dst->dvert, gps_src->dvert, gps_src->totpoints);
}
/* make a copy of a given gpencil stroke */
bGPDstroke *BKE_gpencil_stroke_duplicate(bGPDstroke *gps_src, const bool dup_points)
{
bGPDstroke *gps_dst = NULL;
gps_dst = MEM_dupallocN(gps_src);
gps_dst->prev = gps_dst->next = NULL;
gps_dst->triangles = MEM_dupallocN(gps_dst->triangles);
if (dup_points) {
gps_dst->points = MEM_dupallocN(gps_src->points);
if (gps_src->dvert != NULL) {
gps_dst->dvert = MEM_dupallocN(gps_src->dvert);
BKE_gpencil_stroke_weights_duplicate(gps_src, gps_dst);
}
else {
gps_dst->dvert = NULL;
}
}
/* return new stroke */
return gps_dst;
}
/* make a copy of a given gpencil frame */
bGPDframe *BKE_gpencil_frame_duplicate(const bGPDframe *gpf_src)
{
bGPDstroke *gps_dst = NULL;
bGPDframe *gpf_dst;
/* error checking */
if (gpf_src == NULL) {
return NULL;
}
/* make a copy of the source frame */
gpf_dst = MEM_dupallocN(gpf_src);
gpf_dst->prev = gpf_dst->next = NULL;
/* copy strokes */
BLI_listbase_clear(&gpf_dst->strokes);
for (bGPDstroke *gps_src = gpf_src->strokes.first; gps_src; gps_src = gps_src->next) {
/* make copy of source stroke */
gps_dst = BKE_gpencil_stroke_duplicate(gps_src, true);
BLI_addtail(&gpf_dst->strokes, gps_dst);
}
/* return new frame */
return gpf_dst;
}
/* make a copy of strokes between gpencil frames */
void BKE_gpencil_frame_copy_strokes(bGPDframe *gpf_src, struct bGPDframe *gpf_dst)
{
bGPDstroke *gps_dst = NULL;
/* error checking */
if ((gpf_src == NULL) || (gpf_dst == NULL)) {
return;
}
/* copy strokes */
BLI_listbase_clear(&gpf_dst->strokes);
for (bGPDstroke *gps_src = gpf_src->strokes.first; gps_src; gps_src = gps_src->next) {
/* make copy of source stroke */
gps_dst = BKE_gpencil_stroke_duplicate(gps_src, true);
BLI_addtail(&gpf_dst->strokes, gps_dst);
}
}
/* make a copy of a given gpencil layer */
bGPDlayer *BKE_gpencil_layer_duplicate(const bGPDlayer *gpl_src)
{
const bGPDframe *gpf_src;
bGPDframe *gpf_dst;
bGPDlayer *gpl_dst;
/* error checking */
if (gpl_src == NULL) {
return NULL;
}
/* make a copy of source layer */
gpl_dst = MEM_dupallocN(gpl_src);
gpl_dst->prev = gpl_dst->next = NULL;
/* copy frames */
BLI_listbase_clear(&gpl_dst->frames);
for (gpf_src = gpl_src->frames.first; gpf_src; gpf_src = gpf_src->next) {
/* make a copy of source frame */
gpf_dst = BKE_gpencil_frame_duplicate(gpf_src);
BLI_addtail(&gpl_dst->frames, gpf_dst);
/* if source frame was the current layer's 'active' frame, reassign that too */
if (gpf_src == gpl_dst->actframe) {
gpl_dst->actframe = gpf_dst;
}
}
/* return new layer */
return gpl_dst;
}
/**
* Only copy internal data of GreasePencil ID from source
* to already allocated/initialized destination.
* You probably never want to use that directly,
* use #BKE_id_copy or #BKE_id_copy_ex for typical needs.
*
* WARNING! This function will not handle ID user count!
*
* \param flag: Copying options (see BKE_library.h's LIB_ID_COPY_... flags for more).
*/
void BKE_gpencil_copy_data(bGPdata *gpd_dst, const bGPdata *gpd_src, const int UNUSED(flag))
{
/* duplicate material array */
if (gpd_src->mat) {
gpd_dst->mat = MEM_dupallocN(gpd_src->mat);
}
/* copy layers */
BLI_listbase_clear(&gpd_dst->layers);
LISTBASE_FOREACH (bGPDlayer *, gpl_src, &gpd_src->layers) {
/* make a copy of source layer and its data */
/* TODO here too could add unused flags... */
bGPDlayer *gpl_dst = BKE_gpencil_layer_duplicate(gpl_src);
BLI_addtail(&gpd_dst->layers, gpl_dst);
}
}
/* Standard API to make a copy of GP datablock, separate from copying its data */
bGPdata *BKE_gpencil_copy(Main *bmain, const bGPdata *gpd)
{
bGPdata *gpd_copy;
BKE_id_copy(bmain, &gpd->id, (ID **)&gpd_copy);
return gpd_copy;
}
/* make a copy of a given gpencil datablock */
/* XXX: Should this be deprecated? */
bGPdata *BKE_gpencil_data_duplicate(Main *bmain, const bGPdata *gpd_src, bool internal_copy)
{
bGPdata *gpd_dst;
/* Yuck and super-uber-hyper yuck!!!
* Should be replaceable with a no-main copy (LIB_ID_COPY_NO_MAIN etc.), but not sure about it,
* so for now keep old code for that one. */
/* error checking */
if (gpd_src == NULL) {
return NULL;
}
if (internal_copy) {
/* make a straight copy for undo buffers used during stroke drawing */
gpd_dst = MEM_dupallocN(gpd_src);
}
else {
BLI_assert(bmain != NULL);
BKE_id_copy(bmain, &gpd_src->id, (ID **)&gpd_dst);
}
/* Copy internal data (layers, etc.) */
BKE_gpencil_copy_data(gpd_dst, gpd_src, 0);
/* return new */
return gpd_dst;
}
void BKE_gpencil_make_local(Main *bmain, bGPdata *gpd, const bool lib_local)
{
BKE_id_make_local_generic(bmain, &gpd->id, true, lib_local);
}
/* ************************************************** */
/* GP Stroke API */
/* ensure selection status of stroke is in sync with its points */
void BKE_gpencil_stroke_sync_selection(bGPDstroke *gps)
{
bGPDspoint *pt;
int i;
/* error checking */
if (gps == NULL) {
return;
}
/* we'll stop when we find the first selected point,
* so initially, we must deselect
*/
gps->flag &= ~GP_STROKE_SELECT;
for (i = 0, pt = gps->points; i < gps->totpoints; i++, pt++) {
if (pt->flag & GP_SPOINT_SELECT) {
gps->flag |= GP_STROKE_SELECT;
break;
}
}
}
/* ************************************************** */
/* GP Frame API */
/* delete the last stroke of the given frame */
void BKE_gpencil_frame_delete_laststroke(bGPDlayer *gpl, bGPDframe *gpf)
{
bGPDstroke *gps = (gpf) ? gpf->strokes.last : NULL;
int cfra = (gpf) ? gpf->framenum : 0; /* assume that the current frame was not locked */
/* error checking */
if (ELEM(NULL, gpf, gps)) {
return;
}
/* free the stroke and its data */
if (gps->points) {
MEM_freeN(gps->points);
}
if (gps->dvert) {
BKE_gpencil_free_stroke_weights(gps);
MEM_freeN(gps->dvert);
}
MEM_freeN(gps->triangles);
BLI_freelinkN(&gpf->strokes, gps);
/* if frame has no strokes after this, delete it */
if (BLI_listbase_is_empty(&gpf->strokes)) {
BKE_gpencil_layer_frame_delete(gpl, gpf);
BKE_gpencil_layer_frame_get(gpl, cfra, GP_GETFRAME_USE_PREV);
}
}
/* ************************************************** */
/* GP Layer API */
/* Check if the given layer is able to be edited or not */
bool BKE_gpencil_layer_is_editable(const bGPDlayer *gpl)
{
/* Sanity check */
if (gpl == NULL) {
return false;
}
/* Layer must be: Visible + Editable */
if ((gpl->flag & (GP_LAYER_HIDE | GP_LAYER_LOCKED)) == 0) {
/* Opacity must be sufficiently high that it is still "visible"
* Otherwise, it's not really "visible" to the user, so no point editing...
*/
if (gpl->opacity > GPENCIL_ALPHA_OPACITY_THRESH) {
return true;
}
}
/* Something failed */
return false;
}
/* Look up the gp-frame on the requested frame number, but don't add a new one */
bGPDframe *BKE_gpencil_layer_frame_find(bGPDlayer *gpl, int cframe)
{
bGPDframe *gpf;
/* Search in reverse order, since this is often used for playback/adding,
* where it's less likely that we're interested in the earlier frames
*/
for (gpf = gpl->frames.last; gpf; gpf = gpf->prev) {
if (gpf->framenum == cframe) {
return gpf;
}
}
return NULL;
}
/* get the appropriate gp-frame from a given layer
* - this sets the layer's actframe var (if allowed to)
* - extension beyond range (if first gp-frame is after all frame in interest and cannot add)
*/
bGPDframe *BKE_gpencil_layer_frame_get(bGPDlayer *gpl, int cframe, eGP_GetFrame_Mode addnew)
{
bGPDframe *gpf = NULL;
bool found = false;
/* error checking */
if (gpl == NULL) {
return NULL;
}
/* check if there is already an active frame */
if (gpl->actframe) {
gpf = gpl->actframe;
/* do not allow any changes to layer's active frame if layer is locked from changes
* or if the layer has been set to stay on the current frame
*/
if (gpl->flag & GP_LAYER_FRAMELOCK) {
return gpf;
}
/* do not allow any changes to actframe if frame has painting tag attached to it */
if (gpf->flag & GP_FRAME_PAINT) {
return gpf;
}
/* try to find matching frame */
if (gpf->framenum < cframe) {
for (; gpf; gpf = gpf->next) {
if (gpf->framenum == cframe) {
found = true;
break;
}
else if ((gpf->next) && (gpf->next->framenum > cframe)) {
found = true;
break;
}
}
/* set the appropriate frame */
if (addnew) {
if ((found) && (gpf->framenum == cframe)) {
gpl->actframe = gpf;
}
else if (addnew == GP_GETFRAME_ADD_COPY) {
gpl->actframe = BKE_gpencil_frame_addcopy(gpl, cframe);
}
else {
gpl->actframe = BKE_gpencil_frame_addnew(gpl, cframe);
}
}
else if (found) {
gpl->actframe = gpf;
}
else {
gpl->actframe = gpl->frames.last;
}
}
else {
for (; gpf; gpf = gpf->prev) {
if (gpf->framenum <= cframe) {
found = true;
break;
}
}
/* set the appropriate frame */
if (addnew) {
if ((found) && (gpf->framenum == cframe)) {
gpl->actframe = gpf;
}
else if (addnew == GP_GETFRAME_ADD_COPY) {
gpl->actframe = BKE_gpencil_frame_addcopy(gpl, cframe);
}
else {
gpl->actframe = BKE_gpencil_frame_addnew(gpl, cframe);
}
}
else if (found) {
gpl->actframe = gpf;
}
else {
gpl->actframe = gpl->frames.first;
}
}
}
else if (gpl->frames.first) {
/* check which of the ends to start checking from */
const int first = ((bGPDframe *)(gpl->frames.first))->framenum;
const int last = ((bGPDframe *)(gpl->frames.last))->framenum;
if (abs(cframe - first) > abs(cframe - last)) {
/* find gp-frame which is less than or equal to cframe */
for (gpf = gpl->frames.last; gpf; gpf = gpf->prev) {
if (gpf->framenum <= cframe) {
found = true;
break;
}
}
}
else {
/* find gp-frame which is less than or equal to cframe */
for (gpf = gpl->frames.first; gpf; gpf = gpf->next) {
if (gpf->framenum <= cframe) {
found = true;
break;
}
}
}
/* set the appropriate frame */
if (addnew) {
if ((found) && (gpf->framenum == cframe)) {
gpl->actframe = gpf;
}
else {
gpl->actframe = BKE_gpencil_frame_addnew(gpl, cframe);
}
}
else if (found) {
gpl->actframe = gpf;
}
else {
/* If delete first frame, need to find one. */
if (gpl->frames.first != NULL) {
gpl->actframe = gpl->frames.first;
}
else {
/* unresolved errogenous situation! */
CLOG_STR_ERROR(&LOG, "cannot find appropriate gp-frame");
/* gpl->actframe should still be NULL */
}
}
}
else {
/* currently no frames (add if allowed to) */
if (addnew) {
gpl->actframe = BKE_gpencil_frame_addnew(gpl, cframe);
}
else {
/* don't do anything... this may be when no frames yet! */
/* gpl->actframe should still be NULL */
}
}
/* return */
return gpl->actframe;
}
/* delete the given frame from a layer */
bool BKE_gpencil_layer_frame_delete(bGPDlayer *gpl, bGPDframe *gpf)
{
bool changed = false;
/* error checking */
if (ELEM(NULL, gpl, gpf)) {
return false;
}
/* if this frame was active, make the previous frame active instead
* since it's tricky to set active frame otherwise
*/
if (gpl->actframe == gpf) {
gpl->actframe = gpf->prev;
}
/* free the frame and its data */
changed = BKE_gpencil_free_strokes(gpf);
BLI_freelinkN(&gpl->frames, gpf);
return changed;
}
bGPDlayer *BKE_gpencil_layer_named_get(bGPdata *gpd, const char *name)
{
if (name[0] == '\0') {
return NULL;
}
return BLI_findstring(&gpd->layers, name, offsetof(bGPDlayer, info));
}
/* get the active gp-layer for editing */
bGPDlayer *BKE_gpencil_layer_active_get(bGPdata *gpd)
{
/* error checking */
if (ELEM(NULL, gpd, gpd->layers.first)) {
return NULL;
}
/* loop over layers until found (assume only one active) */
LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
if (gpl->flag & GP_LAYER_ACTIVE) {
return gpl;
}
}
/* no active layer found */
return NULL;
}
/* set the active gp-layer */
void BKE_gpencil_layer_active_set(bGPdata *gpd, bGPDlayer *active)
{
/* error checking */
if (ELEM(NULL, gpd, gpd->layers.first, active)) {
return;
}
/* loop over layers deactivating all */
LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
gpl->flag &= ~GP_LAYER_ACTIVE;
if (gpd->flag & GP_DATA_AUTOLOCK_LAYERS) {
gpl->flag |= GP_LAYER_LOCKED;
}
}
/* set as active one */
active->flag |= GP_LAYER_ACTIVE;
if (gpd->flag & GP_DATA_AUTOLOCK_LAYERS) {
active->flag &= ~GP_LAYER_LOCKED;
}
}
/* Set locked layers for autolock mode. */
void BKE_gpencil_layer_autolock_set(bGPdata *gpd, const bool unlock)
{
BLI_assert(gpd != NULL);
if (gpd->flag & GP_DATA_AUTOLOCK_LAYERS) {
bGPDlayer *layer_active = BKE_gpencil_layer_active_get(gpd);
/* Lock all other layers */
LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
/* unlock active layer */
if (gpl == layer_active) {
gpl->flag &= ~GP_LAYER_LOCKED;
}
else {
gpl->flag |= GP_LAYER_LOCKED;
}
}
}
else {
/* If disable is better unlock all layers by default or it looks there is
* a problem in the UI because the user expects all layers will be unlocked
*/
if (unlock) {
LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
gpl->flag &= ~GP_LAYER_LOCKED;
}
}
}
}
/* delete the active gp-layer */
void BKE_gpencil_layer_delete(bGPdata *gpd, bGPDlayer *gpl)
{
/* error checking */
if (ELEM(NULL, gpd, gpl)) {
return;
}
/* free layer */
BKE_gpencil_free_frames(gpl);
/* free icon providing preview of icon color */
BKE_icon_delete(gpl->runtime.icon_id);
BLI_freelinkN(&gpd->layers, gpl);
}
Material *BKE_gpencil_brush_material_get(Brush *brush)
{
Material *ma = NULL;
if ((brush != NULL) && (brush->gpencil_settings != NULL) &&
(brush->gpencil_settings->material != NULL)) {
ma = brush->gpencil_settings->material;
}
return ma;
}
void BKE_gpencil_brush_material_set(Brush *brush, Material *ma)
{
BLI_assert(brush);
BLI_assert(brush->gpencil_settings);
if (brush->gpencil_settings->material != ma) {
if (brush->gpencil_settings->material) {
id_us_min(&brush->gpencil_settings->material->id);
}
if (ma) {
id_us_plus(&ma->id);
}
brush->gpencil_settings->material = ma;
}
}
/* Adds the pinned material to the object if necessary. */
Material *BKE_gpencil_object_material_ensure_from_brush(Main *bmain, Object *ob, Brush *brush)
{
if (brush->gpencil_settings->flag & GP_BRUSH_MATERIAL_PINNED) {
Material *ma = BKE_gpencil_brush_material_get(brush);
/* check if the material is already on object material slots and add it if missing */
if (ma && BKE_gpencil_object_material_index_get(ob, ma) < 0) {
BKE_object_material_slot_add(bmain, ob);
BKE_object_material_assign(bmain, ob, ma, ob->totcol, BKE_MAT_ASSIGN_USERPREF);
}
return ma;
}
else {
/* using active material instead */
return BKE_object_material_get(ob, ob->actcol);
}
}
/* Assigns the material to object (if not already present) and returns its index (mat_nr). */
int BKE_gpencil_object_material_ensure(Main *bmain, Object *ob, Material *material)
{
if (!material) {
return -1;
}
int index = BKE_gpencil_object_material_index_get(ob, material);
if (index < 0) {
BKE_object_material_slot_add(bmain, ob);
BKE_object_material_assign(bmain, ob, material, ob->totcol, BKE_MAT_ASSIGN_USERPREF);
return ob->totcol - 1;
}
return index;
}
/**
* Creates a new gpencil material and assigns it to object.
*
* \param *r_index: value is set to zero based index of the new material if r_index is not NULL
*/
Material *BKE_gpencil_object_material_new(Main *bmain, Object *ob, const char *name, int *r_index)
{
Material *ma = BKE_gpencil_material_add(bmain, name);
id_us_min(&ma->id); /* no users yet */
BKE_object_material_slot_add(bmain, ob);
BKE_object_material_assign(bmain, ob, ma, ob->totcol, BKE_MAT_ASSIGN_USERPREF);
if (r_index) {
*r_index = ob->actcol - 1;
}
return ma;
}
/* Returns the material for a brush with respect to its pinned state. */
Material *BKE_gpencil_object_material_from_brush_get(Object *ob, Brush *brush)
{
if ((brush) && (brush->gpencil_settings) &&
(brush->gpencil_settings->flag & GP_BRUSH_MATERIAL_PINNED)) {
Material *ma = BKE_gpencil_brush_material_get(brush);
return ma;
}
else {
return BKE_object_material_get(ob, ob->actcol);
}
}
/* Returns the material index for a brush with respect to its pinned state. */
int BKE_gpencil_object_material_get_index_from_brush(Object *ob, Brush *brush)
{
if ((brush) && (brush->gpencil_settings->flag & GP_BRUSH_MATERIAL_PINNED)) {
return BKE_gpencil_object_material_index_get(ob, brush->gpencil_settings->material);
}
else {
return ob->actcol - 1;
}
}
/* Guaranteed to return a material assigned to object. Returns never NULL. */
Material *BKE_gpencil_object_material_ensure_from_active_input_toolsettings(Main *bmain,
Object *ob,
ToolSettings *ts)
{
if (ts && ts->gp_paint && ts->gp_paint->paint.brush) {
return BKE_gpencil_object_material_ensure_from_active_input_brush(
bmain, ob, ts->gp_paint->paint.brush);
}
else {
return BKE_gpencil_object_material_ensure_from_active_input_brush(bmain, ob, NULL);
}
}
/* Guaranteed to return a material assigned to object. Returns never NULL. */
Material *BKE_gpencil_object_material_ensure_from_active_input_brush(Main *bmain,
Object *ob,
Brush *brush)
{
if (brush) {
Material *ma = BKE_gpencil_object_material_ensure_from_brush(bmain, ob, brush);
if (ma) {
return ma;
}
else if (brush->gpencil_settings->flag & GP_BRUSH_MATERIAL_PINNED) {
/* it is easier to just unpin a NULL material, instead of setting a new one */
brush->gpencil_settings->flag &= ~GP_BRUSH_MATERIAL_PINNED;
}
}
return BKE_gpencil_object_material_ensure_from_active_input_material(ob);
}
/**
* Guaranteed to return a material assigned to object. Returns never NULL.
* Only use this for materials unrelated to user input.
*/
Material *BKE_gpencil_object_material_ensure_from_active_input_material(Object *ob)
{
Material *ma = BKE_object_material_get(ob, ob->actcol);
if (ma) {
return ma;
}
return BKE_material_default_gpencil();
}
/* Get active color, and add all default settings if we don't find anything */
Material *BKE_gpencil_object_material_ensure_active(Object *ob)
{
Material *ma = NULL;
/* sanity checks */
if (ob == NULL) {
return NULL;
}
ma = BKE_gpencil_object_material_ensure_from_active_input_material(ob);
if (ma->gp_style == NULL) {
BKE_gpencil_material_attr_init(ma);
}
return ma;
}
/* ************************************************** */
/* GP Object - Boundbox Support */
/**
* Get min/max coordinate bounds for single stroke
* \return Returns whether we found any selected points
*/
bool BKE_gpencil_stroke_minmax(const bGPDstroke *gps,
const bool use_select,
float r_min[3],
float r_max[3])
{
const bGPDspoint *pt;
int i;
bool changed = false;
if (ELEM(NULL, gps, r_min, r_max)) {
return false;
}
for (i = 0, pt = gps->points; i < gps->totpoints; i++, pt++) {
if ((use_select == false) || (pt->flag & GP_SPOINT_SELECT)) {
minmax_v3v3_v3(r_min, r_max, &pt->x);
changed = true;
}
}
return changed;
}
/* get min/max bounds of all strokes in GP datablock */
bool BKE_gpencil_data_minmax(const bGPdata *gpd, float r_min[3], float r_max[3])
{
bool changed = false;
INIT_MINMAX(r_min, r_max);
if (gpd == NULL) {
return changed;
}
LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
bGPDframe *gpf = gpl->actframe;
if (gpf != NULL) {
LISTBASE_FOREACH (bGPDstroke *, gps, &gpf->strokes) {
changed = BKE_gpencil_stroke_minmax(gps, false, r_min, r_max);
}
}
}
return changed;
}
bool BKE_gpencil_stroke_select_check(const bGPDstroke *gps)
{
const bGPDspoint *pt;
int i;
for (i = 0, pt = gps->points; i < gps->totpoints; i++, pt++) {
if (pt->flag & GP_SPOINT_SELECT) {
return true;
}
}
return false;
}
/* compute center of bounding box */
void BKE_gpencil_centroid_3d(bGPdata *gpd, float r_centroid[3])
{
float min[3], max[3], tot[3];
BKE_gpencil_data_minmax(gpd, min, max);
add_v3_v3v3(tot, min, max);
mul_v3_v3fl(r_centroid, tot, 0.5f);
}
/* Compute stroke collision detection center and radius. */
void BKE_gpencil_stroke_collision_get(bGPDstroke *gps)
{
INIT_MINMAX(gps->boundbox_min, gps->boundbox_max);
BKE_gpencil_stroke_minmax(gps, false, gps->boundbox_min, gps->boundbox_max);
}
/* create bounding box values */
static void boundbox_gpencil(Object *ob)
{
BoundBox *bb;
bGPdata *gpd;
float min[3], max[3];
if (ob->runtime.bb == NULL) {
ob->runtime.bb = MEM_callocN(sizeof(BoundBox), "GPencil boundbox");
}
bb = ob->runtime.bb;
gpd = ob->data;
if (!BKE_gpencil_data_minmax(gpd, min, max)) {
min[0] = min[1] = min[2] = -1.0f;
max[0] = max[1] = max[2] = 1.0f;
}
BKE_boundbox_init_from_minmax(bb, min, max);
bb->flag &= ~BOUNDBOX_DIRTY;
}
/* get bounding box */
BoundBox *BKE_gpencil_boundbox_get(Object *ob)
{
if (ELEM(NULL, ob, ob->data)) {
return NULL;
}
bGPdata *gpd = (bGPdata *)ob->data;
if ((ob->runtime.bb) && ((gpd->flag & GP_DATA_CACHE_IS_DIRTY) == 0)) {
return ob->runtime.bb;
}
boundbox_gpencil(ob);
return ob->runtime.bb;
}
/* ************************************************** */
/* Apply Transforms */
void BKE_gpencil_transform(bGPdata *gpd, float mat[4][4])
{
if (gpd == NULL) {
return;
}
const float scalef = mat4_to_scale(mat);
LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
/* FIXME: For now, we just skip parented layers.
* Otherwise, we have to update each frame to find
* the current parent position/effects.
*/
if (gpl->parent) {
continue;
}
LISTBASE_FOREACH (bGPDframe *, gpf, &gpl->frames) {
LISTBASE_FOREACH (bGPDstroke *, gps, &gpf->strokes) {
bGPDspoint *pt;
int i;
for (pt = gps->points, i = 0; i < gps->totpoints; pt++, i++) {
mul_m4_v3(mat, &pt->x);
pt->pressure *= scalef;
}
/* Distortion may mean we need to re-triangulate. */
BKE_gpencil_stroke_geometry_update(gps);
}
}
}
}
/* ************************************************** */
/* GP Object - Vertex Groups */
/* remove a vertex group */
void BKE_gpencil_vgroup_remove(Object *ob, bDeformGroup *defgroup)
{
bGPdata *gpd = ob->data;
MDeformVert *dvert = NULL;
const int def_nr = BLI_findindex(&ob->defbase, defgroup);
const int totgrp = BLI_listbase_count(&ob->defbase);
/* Remove points data */
if (gpd) {
LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
LISTBASE_FOREACH (bGPDframe *, gpf, &gpl->frames) {
LISTBASE_FOREACH (bGPDstroke *, gps, &gpf->strokes) {
if (gps->dvert != NULL) {
for (int i = 0; i < gps->totpoints; i++) {
dvert = &gps->dvert[i];
MDeformWeight *dw = defvert_find_index(dvert, def_nr);
if (dw != NULL) {
defvert_remove_group(dvert, dw);
}
else {
/* Reorganize weights for other groups after deleted one. */
for (int g = 0; g < totgrp; g++) {
dw = defvert_find_index(dvert, g);
if ((dw != NULL) && (dw->def_nr > def_nr)) {
dw->def_nr--;
}
}
}
}
}
}
}
}
}
/* Remove the group */
BLI_freelinkN(&ob->defbase, defgroup);
DEG_id_tag_update(&gpd->id, ID_RECALC_TRANSFORM | ID_RECALC_GEOMETRY);
}
void BKE_gpencil_dvert_ensure(bGPDstroke *gps)
{
if (gps->dvert == NULL) {
gps->dvert = MEM_callocN(sizeof(MDeformVert) * gps->totpoints, "gp_stroke_weights");
}
}
/* ************************************************** */
static void stroke_defvert_create_nr_list(MDeformVert *dv_list,
int count,
ListBase *result,
int *totweight)
{
LinkData *ld;
MDeformVert *dv;
MDeformWeight *dw;
int i, j;
int tw = 0;
for (i = 0; i < count; i++) {
dv = &dv_list[i];
/* find def_nr in list, if not exist, then create one */
for (j = 0; j < dv->totweight; j++) {
bool found = false;
dw = &dv->dw[j];
for (ld = result->first; ld; ld = ld->next) {
if (ld->data == POINTER_FROM_INT(dw->def_nr)) {
found = true;
break;
}
}
if (!found) {
ld = MEM_callocN(sizeof(LinkData), "def_nr_item");
ld->data = POINTER_FROM_INT(dw->def_nr);
BLI_addtail(result, ld);
tw++;
}
}
}
*totweight = tw;
}
static MDeformVert *stroke_defvert_new_count(int count, int totweight, ListBase *def_nr_list)
{
int i, j;
LinkData *ld;
MDeformVert *dst = MEM_mallocN(count * sizeof(MDeformVert), "new_deformVert");
for (i = 0; i < count; i++) {
dst[i].dw = MEM_mallocN(sizeof(MDeformWeight) * totweight, "new_deformWeight");
dst[i].totweight = totweight;
j = 0;
/* re-assign deform groups */
for (ld = def_nr_list->first; ld; ld = ld->next) {
dst[i].dw[j].def_nr = POINTER_AS_INT(ld->data);
j++;
}
}
return dst;
}
static void stroke_interpolate_deform_weights(
bGPDstroke *gps, int index_from, int index_to, float ratio, MDeformVert *vert)
{
const MDeformVert *vl = &gps->dvert[index_from];
const MDeformVert *vr = &gps->dvert[index_to];
int i;
for (i = 0; i < vert->totweight; i++) {
float wl = defvert_find_weight(vl, vert->dw[i].def_nr);
float wr = defvert_find_weight(vr, vert->dw[i].def_nr);
vert->dw[i].weight = interpf(wr, wl, ratio);
}
}
static int stroke_march_next_point(const bGPDstroke *gps,
const int index_next_pt,
const float *current,
const float dist,
float *result,
float *pressure,
float *strength,
float *vert_color,
float *ratio_result,
int *index_from,
int *index_to)
{
float remaining_till_next = 0.0f;
float remaining_march = dist;
float step_start[3];
float point[3];
int next_point_index = index_next_pt;
bGPDspoint *pt = NULL;
if (!(next_point_index < gps->totpoints)) {
return -1;
}
copy_v3_v3(step_start, current);
pt = &gps->points[next_point_index];
copy_v3_v3(point, &pt->x);
remaining_till_next = len_v3v3(point, step_start);
while (remaining_till_next < remaining_march) {
remaining_march -= remaining_till_next;
pt = &gps->points[next_point_index];
copy_v3_v3(point, &pt->x);
copy_v3_v3(step_start, point);
next_point_index++;
if (!(next_point_index < gps->totpoints)) {
next_point_index = gps->totpoints - 1;
break;
}
pt = &gps->points[next_point_index];
copy_v3_v3(point, &pt->x);
remaining_till_next = len_v3v3(point, step_start);
}
if (remaining_till_next < remaining_march) {
pt = &gps->points[next_point_index];
copy_v3_v3(result, &pt->x);
*pressure = gps->points[next_point_index].pressure;
*strength = gps->points[next_point_index].strength;
memcpy(vert_color, gps->points[next_point_index].vert_color, sizeof(float) * 4);
*index_from = next_point_index - 1;
*index_to = next_point_index;
*ratio_result = 1.0f;
return 0;
}
else {
float ratio = remaining_march / remaining_till_next;
interp_v3_v3v3(result, step_start, point, ratio);
*pressure = interpf(
gps->points[next_point_index].pressure, gps->points[next_point_index - 1].pressure, ratio);
*strength = interpf(
gps->points[next_point_index].strength, gps->points[next_point_index - 1].strength, ratio);
interp_v4_v4v4(vert_color,
gps->points[next_point_index - 1].vert_color,
gps->points[next_point_index].vert_color,
ratio);
*index_from = next_point_index - 1;
*index_to = next_point_index;
*ratio_result = ratio;
return next_point_index;
}
}
static int stroke_march_next_point_no_interp(const bGPDstroke *gps,
const int index_next_pt,
const float *current,
const float dist,
float *result)
{
float remaining_till_next = 0.0f;
float remaining_march = dist;
float step_start[3];
float point[3];
int next_point_index = index_next_pt;
bGPDspoint *pt = NULL;
if (!(next_point_index < gps->totpoints)) {
return -1;
}
copy_v3_v3(step_start, current);
pt = &gps->points[next_point_index];
copy_v3_v3(point, &pt->x);
remaining_till_next = len_v3v3(point, step_start);
while (remaining_till_next < remaining_march) {
remaining_march -= remaining_till_next;
pt = &gps->points[next_point_index];
copy_v3_v3(point, &pt->x);
copy_v3_v3(step_start, point);
next_point_index++;
if (!(next_point_index < gps->totpoints)) {
next_point_index = gps->totpoints - 1;
break;
}
pt = &gps->points[next_point_index];
copy_v3_v3(point, &pt->x);
remaining_till_next = len_v3v3(point, step_start);
}
if (remaining_till_next < remaining_march) {
pt = &gps->points[next_point_index];
copy_v3_v3(result, &pt->x);
return 0;
}
else {
float ratio = remaining_march / remaining_till_next;
interp_v3_v3v3(result, step_start, point, ratio);
return next_point_index;
}
}
static int stroke_march_count(const bGPDstroke *gps, const float dist)
{
int point_count = 0;
float point[3];
int next_point_index = 1;
bGPDspoint *pt = NULL;
pt = &gps->points[0];
copy_v3_v3(point, &pt->x);
point_count++;
while ((next_point_index = stroke_march_next_point_no_interp(
gps, next_point_index, point, dist, point)) > -1) {
point_count++;
if (next_point_index == 0) {
break; /* last point finished */
}
}
return point_count;
}
/**
* Resample a stroke
* \param gps: Stroke to sample
* \param dist: Distance of one segment
*/
bool BKE_gpencil_stroke_sample(bGPDstroke *gps, const float dist, const bool select)
{
bGPDspoint *pt = gps->points;
bGPDspoint *pt1 = NULL;
bGPDspoint *pt2 = NULL;
int i;
LinkData *ld;
ListBase def_nr_list = {0};
if (gps->totpoints < 2 || dist < FLT_EPSILON) {
return false;
}
/* TODO: Implement feature point preservation. */
int count = stroke_march_count(gps, dist);
bGPDspoint *new_pt = MEM_callocN(sizeof(bGPDspoint) * count, "gp_stroke_points_sampled");
MDeformVert *new_dv = NULL;
int result_totweight;
if (gps->dvert != NULL) {
stroke_defvert_create_nr_list(gps->dvert, gps->totpoints, &def_nr_list, &result_totweight);
new_dv = stroke_defvert_new_count(count, result_totweight, &def_nr_list);
}
int next_point_index = 1;
i = 0;
float pressure, strength, ratio_result;
float vert_color[4];
int index_from, index_to;
float last_coord[3];
/* 1st point is always at the start */
pt1 = &gps->points[0];
copy_v3_v3(last_coord, &pt1->x);
pt2 = &new_pt[i];
copy_v3_v3(&pt2->x, last_coord);
new_pt[i].pressure = pt[0].pressure;
new_pt[i].strength = pt[0].strength;
memcpy(new_pt[i].vert_color, pt[0].vert_color, sizeof(float) * 4);
if (select) {
new_pt[i].flag |= GP_SPOINT_SELECT;
}
i++;
if (new_dv) {
stroke_interpolate_deform_weights(gps, 0, 0, 0, &new_dv[0]);
}
/* the rest */
while ((next_point_index = stroke_march_next_point(gps,
next_point_index,
last_coord,
dist,
last_coord,
&pressure,
&strength,
vert_color,
&ratio_result,
&index_from,
&index_to)) > -1) {
pt2 = &new_pt[i];
copy_v3_v3(&pt2->x, last_coord);
new_pt[i].pressure = pressure;
new_pt[i].strength = strength;
memcpy(new_pt[i].vert_color, vert_color, sizeof(float) * 4);
if (select) {
new_pt[i].flag |= GP_SPOINT_SELECT;
}
if (new_dv) {
stroke_interpolate_deform_weights(gps, index_from, index_to, ratio_result, &new_dv[i]);
}
i++;
if (next_point_index == 0) {
break; /* last point finished */
}
}
gps->points = new_pt;
/* Free original vertex list. */
MEM_freeN(pt);
if (new_dv) {
/* Free original weight data. */
BKE_gpencil_free_stroke_weights(gps);
MEM_freeN(gps->dvert);
while ((ld = BLI_pophead(&def_nr_list))) {
MEM_freeN(ld);
}
gps->dvert = new_dv;
}
gps->totpoints = i;
/* Calc geometry data. */
BKE_gpencil_stroke_geometry_update(gps);
return true;
}
/**
* Backbone stretch similar to Freestyle.
* \param gps: Stroke to sample
* \param dist: Distance of one segment
* \param tip_length: Ignore tip jittering, set zero to use default value.
*/
bool BKE_gpencil_stroke_stretch(bGPDstroke *gps, const float dist, const float tip_length)
{
bGPDspoint *pt = gps->points, *last_pt, *second_last, *next_pt;
int i;
float threshold = (tip_length == 0 ? 0.001f : tip_length);
if (gps->totpoints < 2 || dist < FLT_EPSILON) {
return false;
}
last_pt = &pt[gps->totpoints - 1];
second_last = &pt[gps->totpoints - 2];
next_pt = &pt[1];
float len1 = 0.0f;
float len2 = 0.0f;
i = 1;
while (len1 < threshold && gps->totpoints > i) {
next_pt = &pt[i];
len1 = len_v3v3(&next_pt->x, &pt->x);
i++;
}
i = 2;
while (len2 < threshold && gps->totpoints >= i) {
second_last = &pt[gps->totpoints - i];
len2 = len_v3v3(&last_pt->x, &second_last->x);
i++;
}
float extend1 = (len1 + dist) / len1;
float extend2 = (len2 + dist) / len2;
float result1[3], result2[3];
interp_v3_v3v3(result1, &next_pt->x, &pt->x, extend1);
interp_v3_v3v3(result2, &second_last->x, &last_pt->x, extend2);
copy_v3_v3(&pt->x, result1);
copy_v3_v3(&last_pt->x, result2);
return true;
}
/**
* Trim stroke to needed segments
* \param gps: Target stroke
* \param index_from: the index of the first point to be used in the trimmed result
* \param index_to: the index of the last point to be used in the trimmed result
*/
bool BKE_gpencil_stroke_trim_points(bGPDstroke *gps, const int index_from, const int index_to)
{
bGPDspoint *pt = gps->points, *new_pt;
MDeformVert *dv, *new_dv;
const int new_count = index_to - index_from + 1;
if (new_count >= gps->totpoints) {
return false;
}
if (new_count == 1) {
BKE_gpencil_free_stroke_weights(gps);
MEM_freeN(gps->points);
gps->points = NULL;
gps->dvert = NULL;
gps->totpoints = 0;
return false;
}
new_pt = MEM_callocN(sizeof(bGPDspoint) * new_count, "gp_stroke_points_trimmed");
for (int i = 0; i < new_count; i++) {
memcpy(&new_pt[i], &pt[i + index_from], sizeof(bGPDspoint));
}
if (gps->dvert) {
new_dv = MEM_callocN(sizeof(MDeformVert) * new_count, "gp_stroke_dverts_trimmed");
for (int i = 0; i < new_count; i++) {
dv = &gps->dvert[i + index_from];
new_dv[i].flag = dv->flag;
new_dv[i].totweight = dv->totweight;
new_dv[i].dw = MEM_callocN(sizeof(MDeformWeight) * dv->totweight,
"gp_stroke_dverts_dw_trimmed");
for (int j = 0; j < dv->totweight; j++) {
new_dv[i].dw[j].weight = dv->dw[j].weight;
new_dv[i].dw[j].def_nr = dv->dw[j].def_nr;
}
}
MEM_freeN(gps->dvert);
gps->dvert = new_dv;
}
MEM_freeN(gps->points);
gps->points = new_pt;
gps->totpoints = new_count;
return true;
}
bool BKE_gpencil_stroke_split(bGPDframe *gpf,
bGPDstroke *gps,
const int before_index,
bGPDstroke **remaining_gps)
{
bGPDstroke *new_gps;
bGPDspoint *pt = gps->points, *new_pt;
MDeformVert *dv, *new_dv;
if (before_index >= gps->totpoints || before_index == 0) {
return false;
}
const int new_count = gps->totpoints - before_index;
const int old_count = before_index;
/* Handle remaining segments first. */
new_gps = BKE_gpencil_stroke_add_existing_style(
gpf, gps, gps->mat_nr, new_count, gps->thickness);
new_pt = new_gps->points; /* Allocated from above. */
for (int i = 0; i < new_count; i++) {
memcpy(&new_pt[i], &pt[i + before_index], sizeof(bGPDspoint));
}
if (gps->dvert) {
new_dv = MEM_callocN(sizeof(MDeformVert) * new_count, "gp_stroke_dverts_remaining");
for (int i = 0; i < new_count; i++) {
dv = &gps->dvert[i + before_index];
new_dv[i].flag = dv->flag;
new_dv[i].totweight = dv->totweight;
new_dv[i].dw = MEM_callocN(sizeof(MDeformWeight) * dv->totweight,
"gp_stroke_dverts_dw_remaining");
for (int j = 0; j < dv->totweight; j++) {
new_dv[i].dw[j].weight = dv->dw[j].weight;
new_dv[i].dw[j].def_nr = dv->dw[j].def_nr;
}
}
new_gps->dvert = new_dv;
}
(*remaining_gps) = new_gps;
/* Trim the original stroke into a shorter one.
* Keep the end point. */
BKE_gpencil_stroke_trim_points(gps, 0, old_count);
BKE_gpencil_stroke_geometry_update(gps);
return true;
}
/**
* Shrink the stroke by length.
* \param gps: Stroke to shrink
* \param dist: delta length
*/
bool BKE_gpencil_stroke_shrink(bGPDstroke *gps, const float dist)
{
bGPDspoint *pt = gps->points, *second_last;
int i;
if (gps->totpoints < 2 || dist < FLT_EPSILON) {
return false;
}
second_last = &pt[gps->totpoints - 2];
float len1, this_len1, cut_len1;
float len2, this_len2, cut_len2;
int index_start, index_end;
len1 = len2 = this_len1 = this_len2 = cut_len1 = cut_len2 = 0.0f;
i = 1;
while (len1 < dist && gps->totpoints > i - 1) {
this_len1 = len_v3v3(&pt[i].x, &pt[i + 1].x);
len1 += this_len1;
cut_len1 = len1 - dist;
i++;
}
index_start = i - 2;
i = 2;
while (len2 < dist && gps->totpoints >= i) {
second_last = &pt[gps->totpoints - i];
this_len2 = len_v3v3(&second_last[1].x, &second_last->x);
len2 += this_len2;
cut_len2 = len2 - dist;
i++;
}
index_end = gps->totpoints - i + 2;
if (len1 < dist || len2 < dist || index_end <= index_start) {
index_start = index_end = 0; /* empty stroke */
}
if ((index_end == index_start + 1) && (cut_len1 + cut_len2 > 1.0f)) {
index_start = index_end = 0; /* no length left to cut */
}
BKE_gpencil_stroke_trim_points(gps, index_start, index_end);
if (gps->totpoints == 0) {
return false;
}
pt = gps->points;
float cut1 = cut_len1 / this_len1;
float cut2 = cut_len2 / this_len2;
float result1[3], result2[3];
interp_v3_v3v3(result1, &pt[1].x, &pt[0].x, cut1);
interp_v3_v3v3(result2, &pt[gps->totpoints - 2].x, &pt[gps->totpoints - 1].x, cut2);
copy_v3_v3(&pt[0].x, result1);
copy_v3_v3(&pt[gps->totpoints - 1].x, result2);
return true;
}
/**
* Apply smooth to stroke point
* \param gps: Stroke to smooth
* \param i: Point index
* \param inf: Amount of smoothing to apply
*/
bool BKE_gpencil_stroke_smooth(bGPDstroke *gps, int i, float inf)
{
bGPDspoint *pt = &gps->points[i];
float sco[3] = {0.0f};
/* Do nothing if not enough points to smooth out */
if (gps->totpoints <= 2) {
return false;
}
/* Only affect endpoints by a fraction of the normal strength,
* to prevent the stroke from shrinking too much
*/
if ((i == 0) || (i == gps->totpoints - 1)) {
inf *= 0.1f;
}
/* Compute smoothed coordinate by taking the ones nearby */
/* XXX: This is potentially slow,
* and suffers from accumulation error as earlier points are handled before later ones. */
{
/* XXX: this is hardcoded to look at 2 points on either side of the current one
* (i.e. 5 items total). */
const int steps = 2;
const float average_fac = 1.0f / (float)(steps * 2 + 1);
int step;
/* add the point itself */
madd_v3_v3fl(sco, &pt->x, average_fac);
/* n-steps before/after current point */
/* XXX: review how the endpoints are treated by this algorithm. */
/* XXX: falloff measures should also introduce some weighting variations,
* so that further-out points get less weight. */
for (step = 1; step <= steps; step++) {
bGPDspoint *pt1, *pt2;
int before = i - step;
int after = i + step;
CLAMP_MIN(before, 0);
CLAMP_MAX(after, gps->totpoints - 1);
pt1 = &gps->points[before];
pt2 = &gps->points[after];
/* add both these points to the average-sum (s += p[i]/n) */
madd_v3_v3fl(sco, &pt1->x, average_fac);
madd_v3_v3fl(sco, &pt2->x, average_fac);
}
}
/* Based on influence factor, blend between original and optimal smoothed coordinate */
interp_v3_v3v3(&pt->x, &pt->x, sco, inf);
return true;
}
/**
* Apply smooth for strength to stroke point */
bool BKE_gpencil_stroke_smooth_strength(bGPDstroke *gps, int point_index, float influence)
{
bGPDspoint *ptb = &gps->points[point_index];
/* Do nothing if not enough points */
if ((gps->totpoints <= 2) || (point_index < 1)) {
return false;
}
/* Only affect endpoints by a fraction of the normal influence */
float inf = influence;
if ((point_index == 0) || (point_index == gps->totpoints - 1)) {
inf *= 0.01f;
}
/* Limit max influence to reduce pop effect. */
CLAMP_MAX(inf, 0.98f);
float total = 0.0f;
float max_strength = 0.0f;
const int steps = 4;
const float average_fac = 1.0f / (float)(steps * 2 + 1);
int step;
/* add the point itself */
total += ptb->strength * average_fac;
max_strength = ptb->strength;
/* n-steps before/after current point */
for (step = 1; step <= steps; step++) {
bGPDspoint *pt1, *pt2;
int before = point_index - step;
int after = point_index + step;
CLAMP_MIN(before, 0);
CLAMP_MAX(after, gps->totpoints - 1);
pt1 = &gps->points[before];
pt2 = &gps->points[after];
/* add both these points to the average-sum (s += p[i]/n) */
total += pt1->strength * average_fac;
total += pt2->strength * average_fac;
/* Save max value. */
if (max_strength < pt1->strength) {
max_strength = pt1->strength;
}
if (max_strength < pt2->strength) {
max_strength = pt2->strength;
}
}
/* Based on influence factor, blend between original and optimal smoothed value. */
ptb->strength = interpf(ptb->strength, total, inf);
/* Clamp to maximum stroke strength to avoid weird results. */
CLAMP_MAX(ptb->strength, max_strength);
return true;
}
/**
* Apply smooth for thickness to stroke point (use pressure) */
bool BKE_gpencil_stroke_smooth_thickness(bGPDstroke *gps, int point_index, float influence)
{
bGPDspoint *ptb = &gps->points[point_index];
/* Do nothing if not enough points */
if ((gps->totpoints <= 2) || (point_index < 1)) {
return false;
}
/* Only affect endpoints by a fraction of the normal influence */
float inf = influence;
if ((point_index == 0) || (point_index == gps->totpoints - 1)) {
inf *= 0.01f;
}
/* Limit max influence to reduce pop effect. */
CLAMP_MAX(inf, 0.98f);
float total = 0.0f;
float max_pressure = 0.0f;
const int steps = 4;
const float average_fac = 1.0f / (float)(steps * 2 + 1);
int step;
/* add the point itself */
total += ptb->pressure * average_fac;
max_pressure = ptb->pressure;
/* n-steps before/after current point */
for (step = 1; step <= steps; step++) {
bGPDspoint *pt1, *pt2;
int before = point_index - step;
int after = point_index + step;
CLAMP_MIN(before, 0);
CLAMP_MAX(after, gps->totpoints - 1);
pt1 = &gps->points[before];
pt2 = &gps->points[after];
/* add both these points to the average-sum (s += p[i]/n) */
total += pt1->pressure * average_fac;
total += pt2->pressure * average_fac;
/* Save max value. */
if (max_pressure < pt1->pressure) {
max_pressure = pt1->pressure;
}
if (max_pressure < pt2->pressure) {
max_pressure = pt2->pressure;
}
}
/* Based on influence factor, blend between original and optimal smoothed value. */
ptb->pressure = interpf(ptb->pressure, total, inf);
/* Clamp to maximum stroke thickness to avoid weird results. */
CLAMP_MAX(ptb->pressure, max_pressure);
return true;
}
/**
* Apply smooth for UV rotation to stroke point (use pressure).
*/
bool BKE_gpencil_stroke_smooth_uv(bGPDstroke *gps, int point_index, float influence)
{
bGPDspoint *ptb = &gps->points[point_index];
/* Do nothing if not enough points */
if (gps->totpoints <= 2) {
return false;
}
/* Compute theoretical optimal value */
bGPDspoint *pta, *ptc;
int before = point_index - 1;
int after = point_index + 1;
CLAMP_MIN(before, 0);
CLAMP_MAX(after, gps->totpoints - 1);
pta = &gps->points[before];
ptc = &gps->points[after];
/* the optimal value is the corresponding to the interpolation of the pressure
* at the distance of point b
*/
float fac = line_point_factor_v3(&ptb->x, &pta->x, &ptc->x);
/* sometimes the factor can be wrong due stroke geometry, so use middle point */
if ((fac < 0.0f) || (fac > 1.0f)) {
fac = 0.5f;
}
float optimal = interpf(ptc->uv_rot, pta->uv_rot, fac);
/* Based on influence factor, blend between original and optimal */
ptb->uv_rot = interpf(optimal, ptb->uv_rot, influence);
CLAMP(ptb->uv_rot, -M_PI_2, M_PI_2);
return true;
}
/**
* Get range of selected frames in layer.
* Always the active frame is considered as selected, so if no more selected the range
* will be equal to the current active frame.
* \param gpl: Layer
* \param r_initframe: Number of first selected frame
* \param r_endframe: Number of last selected frame
*/
void BKE_gpencil_get_range_selected(bGPDlayer *gpl, int *r_initframe, int *r_endframe)
{
*r_initframe = gpl->actframe->framenum;
*r_endframe = gpl->actframe->framenum;
LISTBASE_FOREACH (bGPDframe *, gpf, &gpl->frames) {
if (gpf->flag & GP_FRAME_SELECT) {
if (gpf->framenum < *r_initframe) {
*r_initframe = gpf->framenum;
}
if (gpf->framenum > *r_endframe) {
*r_endframe = gpf->framenum;
}
}
}
}
/**
* Get Falloff factor base on frame range
* \param gpf: Frame
* \param actnum: Number of active frame in layer
* \param f_init: Number of first selected frame
* \param f_end: Number of last selected frame
* \param cur_falloff: Curve with falloff factors
*/
float BKE_gpencil_multiframe_falloff_calc(
bGPDframe *gpf, int actnum, int f_init, int f_end, CurveMapping *cur_falloff)
{
float fnum = 0.5f; /* default mid curve */
float value;
/* check curve is available */
if (cur_falloff == NULL) {
return 1.0f;
}
/* frames to the right of the active frame */
if (gpf->framenum < actnum) {
fnum = (float)(gpf->framenum - f_init) / (actnum - f_init);
fnum *= 0.5f;
value = BKE_curvemapping_evaluateF(cur_falloff, 0, fnum);
}
/* frames to the left of the active frame */
else if (gpf->framenum > actnum) {
fnum = (float)(gpf->framenum - actnum) / (f_end - actnum);
fnum *= 0.5f;
value = BKE_curvemapping_evaluateF(cur_falloff, 0, fnum + 0.5f);
}
else {
value = 1.0f;
}
return value;
}
/* reassign strokes using a material */
void BKE_gpencil_material_index_reassign(bGPdata *gpd, int totcol, int index)
{
LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
LISTBASE_FOREACH (bGPDframe *, gpf, &gpl->frames) {
LISTBASE_FOREACH (bGPDstroke *, gps, &gpf->strokes) {
/* reassign strokes */
if ((gps->mat_nr > index) || (gps->mat_nr > totcol - 1)) {
gps->mat_nr--;
CLAMP_MIN(gps->mat_nr, 0);
}
}
}
}
}
/* remove strokes using a material */
bool BKE_gpencil_material_index_used(bGPdata *gpd, int index)
{
LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
LISTBASE_FOREACH (bGPDframe *, gpf, &gpl->frames) {
LISTBASE_FOREACH (bGPDstroke *, gps, &gpf->strokes) {
if (gps->mat_nr == index) {
return true;
}
}
}
}
return false;
}
void BKE_gpencil_material_remap(struct bGPdata *gpd,
const unsigned int *remap,
unsigned int remap_len)
{
const short remap_len_short = (short)remap_len;
#define MAT_NR_REMAP(n) \
if (n < remap_len_short) { \
BLI_assert(n >= 0 && remap[n] < remap_len_short); \
n = remap[n]; \
} \
((void)0)
LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
LISTBASE_FOREACH (bGPDframe *, gpf, &gpl->frames) {
LISTBASE_FOREACH (bGPDstroke *, gps, &gpf->strokes) {
/* reassign strokes */
MAT_NR_REMAP(gps->mat_nr);
}
}
}
#undef MAT_NR_REMAP
}
/* Load a table with material conversion index for merged materials. */
bool BKE_gpencil_merge_materials_table_get(Object *ob,
const float hue_threshold,
const float sat_threshold,
const float val_threshold,
GHash *r_mat_table)
{
bool changed = false;
Material *ma_primary = NULL;
Material *ma_secondary = NULL;
MaterialGPencilStyle *gp_style_primary = NULL;
MaterialGPencilStyle *gp_style_secondary = NULL;
short *totcol = BKE_object_material_num(ob);
if (totcol == 0) {
return changed;
}
for (int idx_primary = 0; idx_primary < *totcol; idx_primary++) {
/* Read primary material to compare. */
ma_primary = BKE_gpencil_material(ob, idx_primary + 1);
if (ma_primary == NULL) {
continue;
}
for (int idx_secondary = idx_primary + 1; idx_secondary < *totcol; idx_secondary++) {
/* Read secondary material to compare with primary material. */
ma_secondary = BKE_gpencil_material(ob, idx_secondary + 1);
if ((ma_secondary == NULL) ||
(BLI_ghash_haskey(r_mat_table, POINTER_FROM_INT(idx_secondary)))) {
continue;
}
gp_style_primary = ma_primary->gp_style;
gp_style_secondary = ma_secondary->gp_style;
if ((gp_style_primary == NULL) || (gp_style_secondary == NULL) ||
(gp_style_secondary->flag & GP_MATERIAL_LOCKED)) {
continue;
}
/* Check materials have the same mode. */
if (gp_style_primary->mode != gp_style_secondary->mode) {
continue;
}
/* Check materials have same stroke and fill attributes. */
if ((gp_style_primary->flag & GP_MATERIAL_STROKE_SHOW) !=
(gp_style_secondary->flag & GP_MATERIAL_STROKE_SHOW)) {
continue;
}
if ((gp_style_primary->flag & GP_MATERIAL_FILL_SHOW) !=
(gp_style_secondary->flag & GP_MATERIAL_FILL_SHOW)) {
continue;
}
/* Check materials have the same type. */
if ((gp_style_primary->stroke_style != gp_style_secondary->stroke_style) ||
(gp_style_primary->fill_style != gp_style_secondary->fill_style)) {
continue;
}
float s_hsv_a[3], s_hsv_b[3], f_hsv_a[3], f_hsv_b[3], col[3];
copy_v3_v3(col, gp_style_primary->stroke_rgba);
rgb_to_hsv_compat_v(col, s_hsv_a);
copy_v3_v3(col, gp_style_secondary->stroke_rgba);
rgb_to_hsv_compat_v(col, s_hsv_b);
copy_v3_v3(col, gp_style_primary->fill_rgba);
rgb_to_hsv_compat_v(col, f_hsv_a);
copy_v3_v3(col, gp_style_secondary->fill_rgba);
rgb_to_hsv_compat_v(col, f_hsv_b);
/* Check stroke and fill color (only Hue and Saturation). */
if ((!compare_ff(s_hsv_a[0], s_hsv_b[0], hue_threshold)) ||
(!compare_ff(s_hsv_a[1], s_hsv_b[1], sat_threshold)) ||
(!compare_ff(f_hsv_a[0], f_hsv_b[0], hue_threshold)) ||
(!compare_ff(f_hsv_a[1], f_hsv_b[1], sat_threshold)) ||
(!compare_ff(s_hsv_a[2], s_hsv_b[2], val_threshold)) ||
(!compare_ff(s_hsv_a[2], s_hsv_b[2], val_threshold)) ||
(!compare_ff(s_hsv_a[2], s_hsv_b[2], val_threshold)) ||
(!compare_ff(s_hsv_a[2], s_hsv_b[2], val_threshold))) {
continue;
}
/* Save conversion indexes. */
BLI_ghash_insert(
r_mat_table, POINTER_FROM_INT(idx_secondary), POINTER_FROM_INT(idx_primary));
changed = true;
}
}
return changed;
}
/* statistics functions */
void BKE_gpencil_stats_update(bGPdata *gpd)
{
gpd->totlayer = 0;
gpd->totframe = 0;
gpd->totstroke = 0;
gpd->totpoint = 0;
LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
gpd->totlayer++;
LISTBASE_FOREACH (bGPDframe *, gpf, &gpl->frames) {
gpd->totframe++;
LISTBASE_FOREACH (bGPDstroke *, gps, &gpf->strokes) {
gpd->totstroke++;
gpd->totpoint += gps->totpoints;
}
}
}
}
/* get material index (0-based like mat_nr not actcol) */
int BKE_gpencil_object_material_index_get(Object *ob, Material *ma)
{
short *totcol = BKE_object_material_num(ob);
Material *read_ma = NULL;
for (short i = 0; i < *totcol; i++) {
read_ma = BKE_object_material_get(ob, i + 1);
if (ma == read_ma) {
return i;
}
}
return -1;
}
/* Get points of stroke always flat to view not affected by camera view or view position */
void BKE_gpencil_stroke_2d_flat(const bGPDspoint *points,
int totpoints,
float (*points2d)[2],
int *r_direction)
{
BLI_assert(totpoints >= 2);
const bGPDspoint *pt0 = &points[0];
const bGPDspoint *pt1 = &points[1];
const bGPDspoint *pt3 = &points[(int)(totpoints * 0.75)];
float locx[3];
float locy[3];
float loc3[3];
float normal[3];
/* local X axis (p0 -> p1) */
sub_v3_v3v3(locx, &pt1->x, &pt0->x);
/* point vector at 3/4 */
float v3[3];
if (totpoints == 2) {
mul_v3_v3fl(v3, &pt3->x, 0.001f);
}
else {
copy_v3_v3(v3, &pt3->x);
}
sub_v3_v3v3(loc3, v3, &pt0->x);
/* vector orthogonal to polygon plane */
cross_v3_v3v3(normal, locx, loc3);
/* local Y axis (cross to normal/x axis) */
cross_v3_v3v3(locy, normal, locx);
/* Normalize vectors */
normalize_v3(locx);
normalize_v3(locy);
/* Get all points in local space */
for (int i = 0; i < totpoints; i++) {
const bGPDspoint *pt = &points[i];
float loc[3];
/* Get local space using first point as origin */
sub_v3_v3v3(loc, &pt->x, &pt0->x);
points2d[i][0] = dot_v3v3(loc, locx);
points2d[i][1] = dot_v3v3(loc, locy);
}
/* Concave (-1), Convex (1), or Autodetect (0)? */
*r_direction = (int)locy[2];
}
/* Get points of stroke always flat to view not affected by camera view or view position
* using another stroke as reference
*/
void BKE_gpencil_stroke_2d_flat_ref(const bGPDspoint *ref_points,
int ref_totpoints,
const bGPDspoint *points,
int totpoints,
float (*points2d)[2],
const float scale,
int *r_direction)
{
BLI_assert(totpoints >= 2);
const bGPDspoint *pt0 = &ref_points[0];
const bGPDspoint *pt1 = &ref_points[1];
const bGPDspoint *pt3 = &ref_points[(int)(ref_totpoints * 0.75)];
float locx[3];
float locy[3];
float loc3[3];
float normal[3];
/* local X axis (p0 -> p1) */
sub_v3_v3v3(locx, &pt1->x, &pt0->x);
/* point vector at 3/4 */
float v3[3];
if (totpoints == 2) {
mul_v3_v3fl(v3, &pt3->x, 0.001f);
}
else {
copy_v3_v3(v3, &pt3->x);
}
sub_v3_v3v3(loc3, v3, &pt0->x);
/* vector orthogonal to polygon plane */
cross_v3_v3v3(normal, locx, loc3);
/* local Y axis (cross to normal/x axis) */
cross_v3_v3v3(locy, normal, locx);
/* Normalize vectors */
normalize_v3(locx);
normalize_v3(locy);
/* Get all points in local space */
for (int i = 0; i < totpoints; i++) {
const bGPDspoint *pt = &points[i];
float loc[3];
float v1[3];
float vn[3] = {0.0f, 0.0f, 0.0f};
/* apply scale to extremes of the stroke to get better collision detection
* the scale is divided to get more control in the UI parameter
*/
/* first point */
if (i == 0) {
const bGPDspoint *pt_next = &points[i + 1];
sub_v3_v3v3(vn, &pt->x, &pt_next->x);
normalize_v3(vn);
mul_v3_fl(vn, scale / 10.0f);
add_v3_v3v3(v1, &pt->x, vn);
}
/* last point */
else if (i == totpoints - 1) {
const bGPDspoint *pt_prev = &points[i - 1];
sub_v3_v3v3(vn, &pt->x, &pt_prev->x);
normalize_v3(vn);
mul_v3_fl(vn, scale / 10.0f);
add_v3_v3v3(v1, &pt->x, vn);
}
else {
copy_v3_v3(v1, &pt->x);
}
/* Get local space using first point as origin (ref stroke) */
sub_v3_v3v3(loc, v1, &pt0->x);
points2d[i][0] = dot_v3v3(loc, locx);
points2d[i][1] = dot_v3v3(loc, locy);
}
/* Concave (-1), Convex (1), or Autodetect (0)? */
*r_direction = (int)locy[2];
}
/* calc texture coordinates using flat projected points */
static void gpencil_calc_stroke_fill_uv(const float (*points2d)[2],
bGPDstroke *gps,
const float minv[2],
float maxv[2],
float (*r_uv)[2])
{
const float s = sin(gps->uv_rotation);
const float c = cos(gps->uv_rotation);
/* Calc center for rotation. */
float center[2] = {0.5f, 0.5f};
float d[2];
d[0] = maxv[0] - minv[0];
d[1] = maxv[1] - minv[1];
for (int i = 0; i < gps->totpoints; i++) {
r_uv[i][0] = (points2d[i][0] - minv[0]) / d[0];
r_uv[i][1] = (points2d[i][1] - minv[1]) / d[1];
/* Apply translation. */
add_v2_v2(r_uv[i], gps->uv_translation);
/* Apply Rotation. */
r_uv[i][0] -= center[0];
r_uv[i][1] -= center[1];
float x = r_uv[i][0] * c - r_uv[i][1] * s;
float y = r_uv[i][0] * s + r_uv[i][1] * c;
r_uv[i][0] = x + center[0];
r_uv[i][1] = y + center[1];
/* Apply scale. */
if (gps->uv_scale != 0.0f) {
mul_v2_fl(r_uv[i], 1.0f / gps->uv_scale);
}
}
}
/* Triangulate stroke for high quality fill (this is done only if cache is null or stroke was
* modified) */
void BKE_gpencil_stroke_fill_triangulate(bGPDstroke *gps)
{
BLI_assert(gps->totpoints >= 3);
/* allocate memory for temporary areas */
gps->tot_triangles = gps->totpoints - 2;
uint(*tmp_triangles)[3] = MEM_mallocN(sizeof(*tmp_triangles) * gps->tot_triangles,
"GP Stroke temp triangulation");
float(*points2d)[2] = MEM_mallocN(sizeof(*points2d) * gps->totpoints,
"GP Stroke temp 2d points");
float(*uv)[2] = MEM_mallocN(sizeof(*uv) * gps->totpoints, "GP Stroke temp 2d uv data");
int direction = 0;
/* convert to 2d and triangulate */
BKE_gpencil_stroke_2d_flat(gps->points, gps->totpoints, points2d, &direction);
BLI_polyfill_calc(points2d, (uint)gps->totpoints, direction, tmp_triangles);
/* calc texture coordinates automatically */
float minv[2];
float maxv[2];
/* first needs bounding box data */
ARRAY_SET_ITEMS(minv, -1.0f, -1.0f);
ARRAY_SET_ITEMS(maxv, 1.0f, 1.0f);
/* calc uv data */
gpencil_calc_stroke_fill_uv(points2d, gps, minv, maxv, uv);
/* Save triangulation data. */
if (gps->tot_triangles > 0) {
MEM_SAFE_FREE(gps->triangles);
gps->triangles = MEM_callocN(sizeof(*gps->triangles) * gps->tot_triangles,
"GP Stroke triangulation");
for (int i = 0; i < gps->tot_triangles; i++) {
memcpy(gps->triangles[i].verts, tmp_triangles[i], sizeof(uint[3]));
}
/* Copy UVs to bGPDspoint. */
for (int i = 0; i < gps->totpoints; i++) {
copy_v2_v2(gps->points[i].uv_fill, uv[i]);
}
}
else {
/* No triangles needed - Free anything allocated previously */
if (gps->triangles) {
MEM_freeN(gps->triangles);
}
gps->triangles = NULL;
}
/* clear memory */
MEM_SAFE_FREE(tmp_triangles);
MEM_SAFE_FREE(points2d);
MEM_SAFE_FREE(uv);
}
/* texture coordinate utilities */
void BKE_gpencil_stroke_uv_update(bGPDstroke *gps)
{
if (gps == NULL || gps->totpoints == 0) {
return;
}
bGPDspoint *pt = gps->points;
float totlen = 0.0f;
pt[0].uv_fac = totlen;
for (int i = 1; i < gps->totpoints; i++) {
totlen += len_v3v3(&pt[i - 1].x, &pt[i].x);
pt[i].uv_fac = totlen;
}
}
/* Recalc the internal geometry caches for fill and uvs. */
void BKE_gpencil_stroke_geometry_update(bGPDstroke *gps)
{
if (gps == NULL) {
return;
}
if (gps->totpoints > 2) {
BKE_gpencil_stroke_fill_triangulate(gps);
}
else {
gps->tot_triangles = 0;
MEM_SAFE_FREE(gps->triangles);
}
/* calc uv data along the stroke */
BKE_gpencil_stroke_uv_update(gps);
/* Calc collision center and radius. */
BKE_gpencil_stroke_collision_get(gps);
}
float BKE_gpencil_stroke_length(const bGPDstroke *gps, bool use_3d)
{
if (!gps->points || gps->totpoints < 2) {
return 0.0f;
}
float *last_pt = &gps->points[0].x;
int i;
bGPDspoint *pt;
float total_length = 0.0f;
for (i = 1; i < gps->totpoints; i++) {
pt = &gps->points[i];
if (use_3d) {
total_length += len_v3v3(&pt->x, last_pt);
}
else {
total_length += len_v2v2(&pt->x, last_pt);
}
last_pt = &pt->x;
}
return total_length;
}
/**
* Trim stroke to the first intersection or loop
* \param gps: Stroke data
*/
bool BKE_gpencil_stroke_trim(bGPDstroke *gps)
{
if (gps->totpoints < 4) {
return false;
}
bool intersect = false;
int start, end;
float point[3];
/* loop segments from start until we have an intersection */
for (int i = 0; i < gps->totpoints - 2; i++) {
start = i;
bGPDspoint *a = &gps->points[start];
bGPDspoint *b = &gps->points[start + 1];
for (int j = start + 2; j < gps->totpoints - 1; j++) {
end = j + 1;
bGPDspoint *c = &gps->points[j];
bGPDspoint *d = &gps->points[end];
float pointb[3];
/* get intersection */
if (isect_line_line_v3(&a->x, &b->x, &c->x, &d->x, point, pointb)) {
if (len_v3(point) > 0.0f) {
float closest[3];
/* check intersection is on both lines */
float lambda = closest_to_line_v3(closest, point, &a->x, &b->x);
if ((lambda <= 0.0f) || (lambda >= 1.0f)) {
continue;
}
lambda = closest_to_line_v3(closest, point, &c->x, &d->x);
if ((lambda <= 0.0f) || (lambda >= 1.0f)) {
continue;
}
else {
intersect = true;
break;
}
}
}
}
if (intersect) {
break;
}
}
/* trim unwanted points */
if (intersect) {
/* save points */
bGPDspoint *old_points = MEM_dupallocN(gps->points);
MDeformVert *old_dvert = NULL;
MDeformVert *dvert_src = NULL;
if (gps->dvert != NULL) {
old_dvert = MEM_dupallocN(gps->dvert);
}
/* resize gps */
int newtot = end - start + 1;
gps->points = MEM_recallocN(gps->points, sizeof(*gps->points) * newtot);
if (gps->dvert != NULL) {
gps->dvert = MEM_recallocN(gps->dvert, sizeof(*gps->dvert) * newtot);
}
for (int i = 0; i < newtot; i++) {
int idx = start + i;
bGPDspoint *pt_src = &old_points[idx];
bGPDspoint *pt_new = &gps->points[i];
memcpy(pt_new, pt_src, sizeof(bGPDspoint));
if (gps->dvert != NULL) {
dvert_src = &old_dvert[idx];
MDeformVert *dvert = &gps->dvert[i];
memcpy(dvert, dvert_src, sizeof(MDeformVert));
if (dvert_src->dw) {
memcpy(dvert->dw, dvert_src->dw, sizeof(MDeformWeight));
}
}
if (idx == start || idx == end) {
copy_v3_v3(&pt_new->x, point);
}
}
gps->totpoints = newtot;
MEM_SAFE_FREE(old_points);
MEM_SAFE_FREE(old_dvert);
}
BKE_gpencil_stroke_geometry_update(gps);
return intersect;
}
/**
* Close stroke
* \param gps: Stroke to close
*/
bool BKE_gpencil_stroke_close(bGPDstroke *gps)
{
bGPDspoint *pt1 = NULL;
bGPDspoint *pt2 = NULL;
/* Only can close a stroke with 3 points or more. */
if (gps->totpoints < 3) {
return false;
}
/* Calc average distance between points to get same level of sampling. */
float dist_tot = 0.0f;
for (int i = 0; i < gps->totpoints - 1; i++) {
pt1 = &gps->points[i];
pt2 = &gps->points[i + 1];
dist_tot += len_v3v3(&pt1->x, &pt2->x);
}
/* Calc the average distance. */
float dist_avg = dist_tot / (gps->totpoints - 1);
/* Calc distance between last and first point. */
pt1 = &gps->points[gps->totpoints - 1];
pt2 = &gps->points[0];
float dist_close = len_v3v3(&pt1->x, &pt2->x);
/* if the distance to close is very small, don't need add points and just enable cyclic. */
if (dist_close <= dist_avg) {
gps->flag |= GP_STROKE_CYCLIC;
return true;
}
/* Calc number of points required using the average distance. */
int tot_newpoints = MAX2(dist_close / dist_avg, 1);
/* Resize stroke array. */
int old_tot = gps->totpoints;
gps->totpoints += tot_newpoints;
gps->points = MEM_recallocN(gps->points, sizeof(*gps->points) * gps->totpoints);
if (gps->dvert != NULL) {
gps->dvert = MEM_recallocN(gps->dvert, sizeof(*gps->dvert) * gps->totpoints);
}
/* Generate new points */
pt1 = &gps->points[old_tot - 1];
pt2 = &gps->points[0];
bGPDspoint *pt = &gps->points[old_tot];
for (int i = 1; i < tot_newpoints + 1; i++, pt++) {
float step = (tot_newpoints > 1) ? ((float)i / (float)tot_newpoints) : 0.99f;
/* Clamp last point to be near, but not on top of first point. */
if ((tot_newpoints > 1) && (i == tot_newpoints)) {
step *= 0.99f;
}
/* Average point. */
interp_v3_v3v3(&pt->x, &pt1->x, &pt2->x, step);
pt->pressure = interpf(pt2->pressure, pt1->pressure, step);
pt->strength = interpf(pt2->strength, pt1->strength, step);
pt->flag = 0;
interp_v4_v4v4(pt->vert_color, pt1->vert_color, pt2->vert_color, step);
/* Set weights. */
if (gps->dvert != NULL) {
MDeformVert *dvert1 = &gps->dvert[old_tot - 1];
MDeformWeight *dw1 = defvert_verify_index(dvert1, 0);
float weight_1 = dw1 ? dw1->weight : 0.0f;
MDeformVert *dvert2 = &gps->dvert[0];
MDeformWeight *dw2 = defvert_verify_index(dvert2, 0);
float weight_2 = dw2 ? dw2->weight : 0.0f;
MDeformVert *dvert_final = &gps->dvert[old_tot + i - 1];
dvert_final->totweight = 0;
MDeformWeight *dw = defvert_verify_index(dvert_final, 0);
if (dvert_final->dw) {
dw->weight = interpf(weight_2, weight_1, step);
}
}
}
/* Enable cyclic flag. */
gps->flag |= GP_STROKE_CYCLIC;
return true;
}
/* Dissolve points in stroke */
void BKE_gpencil_dissolve_points(bGPDframe *gpf, bGPDstroke *gps, const short tag)
{
bGPDspoint *pt;
MDeformVert *dvert = NULL;
int i;
int tot = gps->totpoints; /* number of points in new buffer */
/* first pass: count points to remove */
/* Count how many points are selected (i.e. how many to remove) */
for (i = 0, pt = gps->points; i < gps->totpoints; i++, pt++) {
if (pt->flag & tag) {
/* selected point - one of the points to remove */
tot--;
}
}
/* if no points are left, we simply delete the entire stroke */
if (tot <= 0) {
/* remove the entire stroke */
if (gps->points) {
MEM_freeN(gps->points);
}
if (gps->dvert) {
BKE_gpencil_free_stroke_weights(gps);
MEM_freeN(gps->dvert);
}
if (gps->triangles) {
MEM_freeN(gps->triangles);
}
BLI_freelinkN(&gpf->strokes, gps);
}
else {
/* just copy all points to keep into a smaller buffer */
bGPDspoint *new_points = MEM_callocN(sizeof(bGPDspoint) * tot, "new gp stroke points copy");
bGPDspoint *npt = new_points;
MDeformVert *new_dvert = NULL;
MDeformVert *ndvert = NULL;
if (gps->dvert != NULL) {
new_dvert = MEM_callocN(sizeof(MDeformVert) * tot, "new gp stroke weights copy");
ndvert = new_dvert;
}
(gps->dvert != NULL) ? dvert = gps->dvert : NULL;
for (i = 0, pt = gps->points; i < gps->totpoints; i++, pt++) {
if ((pt->flag & tag) == 0) {
*npt = *pt;
npt++;
if (gps->dvert != NULL) {
*ndvert = *dvert;
ndvert->dw = MEM_dupallocN(dvert->dw);
ndvert++;
}
}
if (gps->dvert != NULL) {
dvert++;
}
}
/* free the old buffer */
if (gps->points) {
MEM_freeN(gps->points);
}
if (gps->dvert) {
BKE_gpencil_free_stroke_weights(gps);
MEM_freeN(gps->dvert);
}
/* save the new buffer */
gps->points = new_points;
gps->dvert = new_dvert;
gps->totpoints = tot;
/* triangles cache needs to be recalculated */
BKE_gpencil_stroke_geometry_update(gps);
}
}
/* Merge by distance ------------------------------------- */
/* Reduce a series of points when the distance is below a threshold.
* Special case for first and last points (both are keeped) for other points,
* the merge point always is at first point.
* \param gpf: Grease Pencil frame
* \param gps: Grease Pencil stroke
* \param threshold: Distance between points
* \param use_unselected: Set to true to analyze all stroke and not only selected points
*/
void BKE_gpencil_stroke_merge_distance(bGPDframe *gpf,
bGPDstroke *gps,
const float threshold,
const bool use_unselected)
{
bGPDspoint *pt = NULL;
bGPDspoint *pt_next = NULL;
float tagged = false;
/* Use square distance to speed up loop */
const float th_square = threshold * threshold;
/* Need to have something to merge. */
if (gps->totpoints < 2) {
return;
}
int i = 0;
int step = 1;
while ((i < gps->totpoints - 1) && (i + step < gps->totpoints)) {
pt = &gps->points[i];
if (pt->flag & GP_SPOINT_TAG) {
i++;
step = 1;
continue;
}
pt_next = &gps->points[i + step];
/* Do not recalc tagged points. */
if (pt_next->flag & GP_SPOINT_TAG) {
step++;
continue;
}
/* Check if contiguous points are selected. */
if (!use_unselected) {
if (((pt->flag & GP_SPOINT_SELECT) == 0) || ((pt_next->flag & GP_SPOINT_SELECT) == 0)) {
i++;
step = 1;
continue;
}
}
float len_square = len_squared_v3v3(&pt->x, &pt_next->x);
if (len_square <= th_square) {
tagged = true;
if (i != gps->totpoints - 1) {
/* Tag second point for delete. */
pt_next->flag |= GP_SPOINT_TAG;
}
else {
pt->flag |= GP_SPOINT_TAG;
}
/* Jump to next pair of points, keeping first point segment equals.*/
step++;
}
else {
/* Analyze next point. */
i++;
step = 1;
}
}
/* Always untag extremes. */
pt = &gps->points[0];
pt->flag &= ~GP_SPOINT_TAG;
pt = &gps->points[gps->totpoints - 1];
pt->flag &= ~GP_SPOINT_TAG;
/* Dissolve tagged points */
if (tagged) {
BKE_gpencil_dissolve_points(gpf, gps, GP_SPOINT_TAG);
}
/* Calc geometry data. */
BKE_gpencil_stroke_geometry_update(gps);
}
/* Helper: Check materials with same color. */
static int gpencil_check_same_material_color(Object *ob_gp, float color[4], Material **r_mat)
{
Material *ma = NULL;
float color_cu[4];
linearrgb_to_srgb_v3_v3(color_cu, color);
float hsv1[4];
rgb_to_hsv_v(color_cu, hsv1);
hsv1[3] = color[3];
for (int i = 1; i <= ob_gp->totcol; i++) {
ma = BKE_object_material_get(ob_gp, i);
MaterialGPencilStyle *gp_style = ma->gp_style;
/* Check color with small tolerance (better in HSV). */
float hsv2[4];
rgb_to_hsv_v(gp_style->fill_rgba, hsv2);
hsv2[3] = gp_style->fill_rgba[3];
if ((gp_style->fill_style == GP_MATERIAL_FILL_STYLE_SOLID) &&
(compare_v4v4(hsv1, hsv2, 0.01f))) {
*r_mat = ma;
return i - 1;
}
}
*r_mat = NULL;
return -1;
}
/* Helper: Add gpencil material using curve material as base. */
static Material *gpencil_add_from_curve_material(Main *bmain,
Object *ob_gp,
const float cu_color[4],
const bool gpencil_lines,
const bool fill,
int *r_idx)
{
Material *mat_gp = BKE_gpencil_object_material_new(
bmain, ob_gp, (fill) ? "Material" : "Unassigned", r_idx);
MaterialGPencilStyle *gp_style = mat_gp->gp_style;
/* Stroke color. */
if (gpencil_lines) {
ARRAY_SET_ITEMS(gp_style->stroke_rgba, 0.0f, 0.0f, 0.0f, 1.0f);
gp_style->flag |= GP_MATERIAL_STROKE_SHOW;
}
else {
linearrgb_to_srgb_v4(gp_style->stroke_rgba, cu_color);
gp_style->flag &= ~GP_MATERIAL_STROKE_SHOW;
}
/* Fill color. */
linearrgb_to_srgb_v4(gp_style->fill_rgba, cu_color);
/* Fill is false if the original curve hasn't material assigned, so enable it. */
if (fill) {
gp_style->flag |= GP_MATERIAL_FILL_SHOW;
}
/* Check at least one is enabled. */
if (((gp_style->flag & GP_MATERIAL_STROKE_SHOW) == 0) &&
((gp_style->flag & GP_MATERIAL_FILL_SHOW) == 0)) {
gp_style->flag |= GP_MATERIAL_STROKE_SHOW;
}
return mat_gp;
}
/* Helper: Create new stroke section. */
static void gpencil_add_new_points(bGPDstroke *gps,
float *coord_array,
float pressure,
int init,
int totpoints,
const float init_co[3],
bool last)
{
for (int i = 0; i < totpoints; i++) {
bGPDspoint *pt = &gps->points[i + init];
copy_v3_v3(&pt->x, &coord_array[3 * i]);
/* Be sure the last point is not on top of the first point of the curve or
* the close of the stroke will produce glitches. */
if ((last) && (i > 0) && (i == totpoints - 1)) {
float dist = len_v3v3(init_co, &pt->x);
if (dist < 0.1f) {
/* Interpolate between previous point and current to back slightly. */
bGPDspoint *pt_prev = &gps->points[i + init - 1];
interp_v3_v3v3(&pt->x, &pt_prev->x, &pt->x, 0.95f);
}
}
pt->pressure = pressure;
pt->strength = 1.0f;
}
}
/* Helper: Get the first collection that includes the object. */
static Collection *gpencil_get_parent_collection(Scene *scene, Object *ob)
{
Collection *mycol = NULL;
FOREACH_SCENE_COLLECTION_BEGIN (scene, collection) {
for (CollectionObject *cob = collection->gobject.first; cob; cob = cob->next) {
if ((mycol == NULL) && (cob->ob == ob)) {
mycol = collection;
}
}
}
FOREACH_SCENE_COLLECTION_END;
return mycol;
}
/* Helper: Convert one spline to grease pencil stroke. */
static void gpencil_convert_spline(Main *bmain,
Object *ob_gp,
Object *ob_cu,
const bool gpencil_lines,
const bool only_stroke,
bGPDframe *gpf,
Nurb *nu)
{
Curve *cu = (Curve *)ob_cu->data;
bool cyclic = true;
/* Create Stroke. */
bGPDstroke *gps = MEM_callocN(sizeof(bGPDstroke), "bGPDstroke");
gps->thickness = 1.0f;
gps->fill_opacity_fac = 1.0f;
gps->gradient_f = 1.0f;
gps->uv_scale = 1.0f;
ARRAY_SET_ITEMS(gps->gradient_s, 1.0f, 1.0f);
ARRAY_SET_ITEMS(gps->caps, GP_STROKE_CAP_ROUND, GP_STROKE_CAP_ROUND);
gps->inittime = 0.0f;
gps->flag &= ~GP_STROKE_SELECT;
gps->flag |= GP_STROKE_3DSPACE;
gps->mat_nr = 0;
/* Count total points
* The total of points must consider that last point of each segment is equal to the first
* point of next segment.
*/
int totpoints = 0;
int segments = 0;
int resolu = nu->resolu + 1;
segments = nu->pntsu;
if (((nu->flagu & CU_NURB_CYCLIC) == 0) || (nu->pntsu == 2)) {
segments--;
cyclic = false;
}
totpoints = (resolu * segments) - (segments - 1);
/* Materials
* Notice: The color of the material is the color of viewport and not the final shader color.
*/
Material *mat_gp = NULL;
bool fill = true;
/* Check if grease pencil has a material with same color.*/
float color[4];
if ((cu->mat) && (*cu->mat)) {
Material *mat_cu = *cu->mat;
copy_v4_v4(color, &mat_cu->r);
}
else {
/* Gray (unassigned from SVG add-on) */
zero_v4(color);
add_v3_fl(color, 0.6f);
color[3] = 1.0f;
fill = false;
}
/* Special case: If the color was created by the SVG add-on and the name contains '_stroke' and
* there is only one color, the stroke must not be closed, fill to false and use for
* stroke the fill color.
*/
bool do_stroke = false;
if (ob_cu->totcol == 1) {
Material *ma_stroke = BKE_object_material_get(ob_cu, 1);
if ((ma_stroke) && (strstr(ma_stroke->id.name, "_stroke") != NULL)) {
do_stroke = true;
}
}
int r_idx = gpencil_check_same_material_color(ob_gp, color, &mat_gp);
if ((ob_cu->totcol > 0) && (r_idx < 0)) {
Material *mat_curve = BKE_object_material_get(ob_cu, 1);
mat_gp = gpencil_add_from_curve_material(bmain, ob_gp, color, gpencil_lines, fill, &r_idx);
if ((mat_curve) && (mat_curve->gp_style != NULL)) {
MaterialGPencilStyle *gp_style_cur = mat_curve->gp_style;
MaterialGPencilStyle *gp_style_gp = mat_gp->gp_style;
copy_v4_v4(gp_style_gp->mix_rgba, gp_style_cur->mix_rgba);
gp_style_gp->fill_style = gp_style_cur->fill_style;
gp_style_gp->mix_factor = gp_style_cur->mix_factor;
}
/* If object has more than 1 material, use second material for stroke color. */
if ((!only_stroke) && (ob_cu->totcol > 1) && (BKE_object_material_get(ob_cu, 2))) {
mat_curve = BKE_object_material_get(ob_cu, 2);
if (mat_curve) {
linearrgb_to_srgb_v3_v3(mat_gp->gp_style->stroke_rgba, &mat_curve->r);
mat_gp->gp_style->stroke_rgba[3] = mat_curve->a;
}
}
else if ((only_stroke) || (do_stroke)) {
/* Also use the first color if the fill is none for stroke color. */
if (ob_cu->totcol > 0) {
mat_curve = BKE_object_material_get(ob_cu, 1);
if (mat_curve) {
copy_v3_v3(mat_gp->gp_style->stroke_rgba, &mat_curve->r);
mat_gp->gp_style->stroke_rgba[3] = mat_curve->a;
/* Set fill and stroke depending of curve type (3D or 2D). */
if ((cu->flag & CU_3D) || ((cu->flag & (CU_FRONT | CU_BACK)) == 0)) {
mat_gp->gp_style->flag |= GP_MATERIAL_STROKE_SHOW;
mat_gp->gp_style->flag &= ~GP_MATERIAL_FILL_SHOW;
}
else {
mat_gp->gp_style->flag &= ~GP_MATERIAL_STROKE_SHOW;
mat_gp->gp_style->flag |= GP_MATERIAL_FILL_SHOW;
}
}
}
}
}
CLAMP_MIN(r_idx, 0);
/* Assign material index to stroke. */
gps->mat_nr = r_idx;
/* Add stroke to frame.*/
BLI_addtail(&gpf->strokes, gps);
float *coord_array = NULL;
float init_co[3];
switch (nu->type) {
case CU_POLY: {
/* Allocate memory for storage points. */
gps->totpoints = nu->pntsu;
gps->points = MEM_callocN(sizeof(bGPDspoint) * gps->totpoints, "gp_stroke_points");
/* Increase thickness for this type. */
gps->thickness = 10.0f;
/* Get all curve points */
for (int s = 0; s < gps->totpoints; s++) {
BPoint *bp = &nu->bp[s];
bGPDspoint *pt = &gps->points[s];
copy_v3_v3(&pt->x, bp->vec);
pt->pressure = bp->radius;
pt->strength = 1.0f;
}
break;
}
case CU_BEZIER: {
/* Allocate memory for storage points. */
gps->totpoints = totpoints;
gps->points = MEM_callocN(sizeof(bGPDspoint) * gps->totpoints, "gp_stroke_points");
int init = 0;
resolu = nu->resolu + 1;
segments = nu->pntsu;
if (((nu->flagu & CU_NURB_CYCLIC) == 0) || (nu->pntsu == 2)) {
segments--;
}
/* Get all interpolated curve points of Beziert */
for (int s = 0; s < segments; s++) {
int inext = (s + 1) % nu->pntsu;
BezTriple *prevbezt = &nu->bezt[s];
BezTriple *bezt = &nu->bezt[inext];
bool last = (bool)(s == segments - 1);
coord_array = MEM_callocN((size_t)3 * resolu * sizeof(float), __func__);
for (int j = 0; j < 3; j++) {
BKE_curve_forward_diff_bezier(prevbezt->vec[1][j],
prevbezt->vec[2][j],
bezt->vec[0][j],
bezt->vec[1][j],
coord_array + j,
resolu - 1,
3 * sizeof(float));
}
/* Save first point coordinates. */
if (s == 0) {
copy_v3_v3(init_co, &coord_array[0]);
}
/* Add points to the stroke */
gpencil_add_new_points(gps, coord_array, bezt->radius, init, resolu, init_co, last);
/* Free memory. */
MEM_SAFE_FREE(coord_array);
/* As the last point of segment is the first point of next segment, back one array
* element to avoid duplicated points on the same location.
*/
init += resolu - 1;
}
break;
}
case CU_NURBS: {
if (nu->pntsv == 1) {
int nurb_points;
if (nu->flagu & CU_NURB_CYCLIC) {
resolu++;
nurb_points = nu->pntsu * resolu;
}
else {
nurb_points = (nu->pntsu - 1) * resolu;
}
/* Get all curve points. */
coord_array = MEM_callocN(sizeof(float[3]) * nurb_points, __func__);
BKE_nurb_makeCurve(nu, coord_array, NULL, NULL, NULL, resolu, sizeof(float[3]));
/* Allocate memory for storage points. */
gps->totpoints = nurb_points - 1;
gps->points = MEM_callocN(sizeof(bGPDspoint) * gps->totpoints, "gp_stroke_points");
/* Add points. */
gpencil_add_new_points(gps, coord_array, 1.0f, 0, gps->totpoints, init_co, false);
MEM_SAFE_FREE(coord_array);
}
break;
}
default: {
break;
}
}
/* Cyclic curve, close stroke. */
if ((cyclic) && (!do_stroke)) {
BKE_gpencil_stroke_close(gps);
}
/* Recalc fill geometry. */
BKE_gpencil_stroke_geometry_update(gps);
}
/* Convert a curve object to grease pencil stroke.
*
* \param bmain: Main thread pointer
* \param scene: Original scene.
* \param ob_gp: Grease pencil object to add strokes.
* \param ob_cu: Curve to convert.
* \param gpencil_lines: Use lines for strokes.
* \param use_collections: Create layers using collection names.
* \param only_stroke: The material must be only stroke without fill.
*/
void BKE_gpencil_convert_curve(Main *bmain,
Scene *scene,
Object *ob_gp,
Object *ob_cu,
const bool gpencil_lines,
const bool use_collections,
const bool only_stroke)
{
if (ELEM(NULL, ob_gp, ob_cu) || (ob_gp->type != OB_GPENCIL) || (ob_gp->data == NULL)) {
return;
}
Curve *cu = (Curve *)ob_cu->data;
bGPdata *gpd = (bGPdata *)ob_gp->data;
bGPDlayer *gpl = NULL;
/* If the curve is empty, cancel. */
if (cu->nurb.first == NULL) {
return;
}
/* Check if there is an active layer. */
if (use_collections) {
Collection *collection = gpencil_get_parent_collection(scene, ob_cu);
if (collection != NULL) {
gpl = BKE_gpencil_layer_named_get(gpd, collection->id.name + 2);
if (gpl == NULL) {
gpl = BKE_gpencil_layer_addnew(gpd, collection->id.name + 2, true);
}
}
}
if (gpl == NULL) {
gpl = BKE_gpencil_layer_active_get(gpd);
if (gpl == NULL) {
gpl = BKE_gpencil_layer_addnew(gpd, DATA_("GP_Layer"), true);
}
}
/* Check if there is an active frame and add if needed. */
bGPDframe *gpf = BKE_gpencil_layer_frame_get(gpl, CFRA, GP_GETFRAME_ADD_COPY);
/* Read all splines of the curve and create a stroke for each. */
for (Nurb *nu = cu->nurb.first; nu; nu = nu->next) {
gpencil_convert_spline(bmain, ob_gp, ob_cu, gpencil_lines, only_stroke, gpf, nu);
}
/* Tag for recalculation */
DEG_id_tag_update(&gpd->id, ID_RECALC_GEOMETRY | ID_RECALC_COPY_ON_WRITE);
}
/* Create a default palette */
void BKE_gpencil_palette_ensure(Main *bmain, Scene *scene)
{
const int totcol = 120;
const char *hexcol[] = {
"FFFFFF", "F2F2F2", "E6E6E6", "D9D9D9", "CCCCCC", "BFBFBF", "B2B2B2", "A6A6A6", "999999",
"8C8C8C", "808080", "737373", "666666", "595959", "4C4C4C", "404040", "333333", "262626",
"1A1A1A", "000000", "F2FC24", "FFEA00", "FEA711", "FE8B68", "FB3B02", "FE3521", "D00000",
"A81F3D", "780422", "2B0000", "F1E2C5", "FEE4B3", "FEDABB", "FEC28E", "D88F57", "BD6340",
"A2402B", "63352D", "6B2833", "34120C", "E7CB8F", "D1B38B", "C1B17F", "D7980B", "FFB100",
"FE8B00", "FF6A00", "B74100", "5F3E1D", "3B2300", "FECADA", "FE65CB", "FE1392", "DD3062",
"C04A6D", "891688", "4D2689", "441521", "2C1139", "241422", "FFFF7D", "FFFF00", "FF7F00",
"FF7D7D", "FF7DFF", "FF00FE", "FF007F", "FF0000", "7F0000", "0A0A00", "F6FDFF", "E9F7FF",
"CFE6FE", "AAC7FE", "77B3FE", "1E74FD", "0046AA", "2F4476", "003052", "0E0E25", "EEF5F0",
"D6E5DE", "ACD8B9", "6CADC6", "42A9AF", "007F7F", "49675C", "2E4E4E", "1D3239", "0F1C21",
"D8FFF4", "B8F4F5", "AECCB5", "76C578", "358757", "409B68", "468768", "1F512B", "2A3C37",
"122E1D", "EFFFC9", "E6F385", "BCF51C", "D4DC18", "82D322", "5C7F00", "59932B", "297F00",
"004320", "1C3322", "00FF7F", "00FF00", "7DFF7D", "7DFFFF", "00FFFF", "7D7DFF", "7F00FF",
"0000FF", "3F007F", "00007F"};
ToolSettings *ts = scene->toolsettings;
GpPaint *gp_paint = ts->gp_paint;
Paint *paint = &gp_paint->paint;
paint->palette = BLI_findstring(&bmain->palettes, "Palette", offsetof(ID, name) + 2);
if (paint->palette == NULL) {
paint->palette = BKE_palette_add(bmain, "Palette");
ts->gp_vertexpaint->paint.palette = paint->palette;
/* Create Colors. */
for (int i = 0; i < totcol; i++) {
PaletteColor *palcol = BKE_palette_color_add(paint->palette);
if (palcol) {
hex_to_rgb((char *)hexcol[i], palcol->rgb, palcol->rgb + 1, palcol->rgb + 2);
}
}
}
}
bool BKE_gpencil_from_image(SpaceImage *sima, bGPDframe *gpf, const float size, const bool mask)
{
Image *image = sima->image;
bool done = false;
if (image == NULL) {
return false;
}
ImageUser iuser = sima->iuser;
void *lock;
ImBuf *ibuf;
ibuf = BKE_image_acquire_ibuf(image, &iuser, &lock);
if (ibuf->rect) {
int img_x = ibuf->x;
int img_y = ibuf->y;
float color[4];
bGPDspoint *pt;
for (int row = 0; row < img_y; row++) {
/* Create new stroke */
bGPDstroke *gps = BKE_gpencil_stroke_add(gpf, 0, img_x, size * 1000, false);
done = true;
for (int col = 0; col < img_x; col++) {
IMB_sampleImageAtLocation(ibuf, col, row, true, color);
pt = &gps->points[col];
pt->pressure = 1.0f;
pt->x = col * size;
pt->z = row * size;
if (!mask) {
copy_v3_v3(pt->vert_color, color);
pt->vert_color[3] = 1.0f;
pt->strength = color[3];
}
else {
zero_v3(pt->vert_color);
pt->vert_color[3] = 1.0f;
pt->strength = 1.0f - color[3];
}
/* Selet Alpha points. */
if (pt->strength < 0.03f) {
gps->flag |= GP_STROKE_SELECT;
pt->flag |= GP_SPOINT_SELECT;
}
}
BKE_gpencil_stroke_geometry_update(gps);
}
}
/* Free memory. */
BKE_image_release_ibuf(image, ibuf, lock);
return done;
}
/* -------------------------------------------------------------------- */
/** \name Iterators
*
* Iterate over all visible stroke of all visible layers inside a gpObject.
* Also take into account onion skining.
*
* \{ */
void BKE_gpencil_visible_stroke_iter(
Object *ob, gpIterCb layer_cb, gpIterCb stroke_cb, void *thunk, bool do_onion, int cfra)
{
bGPdata *gpd = (bGPdata *)ob->data;
const bool is_multiedit = GPENCIL_MULTIEDIT_SESSIONS_ON(gpd);
const bool is_onion = do_onion && ((gpd->flag & GP_DATA_STROKE_WEIGHTMODE) == 0);
/* Onion skinning. */
const bool onion_mode_abs = (gpd->onion_mode == GP_ONION_MODE_ABSOLUTE);
const bool onion_mode_sel = (gpd->onion_mode == GP_ONION_MODE_SELECTED);
const bool onion_loop = (gpd->onion_flag & GP_ONION_LOOP) != 0;
const short onion_keytype = gpd->onion_keytype;
LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
bGPDframe *act_gpf = gpl->actframe;
bGPDframe *sta_gpf = act_gpf;
bGPDframe *end_gpf = act_gpf ? act_gpf->next : NULL;
if (gpl->flag & GP_LAYER_HIDE) {
continue;
}
if (is_multiedit) {
sta_gpf = end_gpf = NULL;
/* Check the whole range and tag the editable frames. */
LISTBASE_FOREACH (bGPDframe *, gpf, &gpl->frames) {
if (gpf == act_gpf || (gpf->flag & GP_FRAME_SELECT)) {
gpf->runtime.onion_id = 0;
if (sta_gpf == NULL) {
sta_gpf = gpf;
}
end_gpf = gpf->next;
}
else {
gpf->runtime.onion_id = INT_MAX;
}
}
}
else if (is_onion && (gpl->onion_flag & GP_LAYER_ONIONSKIN)) {
if (act_gpf) {
bGPDframe *last_gpf = gpl->frames.last;
int frame_len = 0;
LISTBASE_FOREACH (bGPDframe *, gpf, &gpl->frames) {
gpf->runtime.frameid = frame_len++;
}
LISTBASE_FOREACH (bGPDframe *, gpf, &gpl->frames) {
bool is_wrong_keytype = (onion_keytype > -1) && (gpf->key_type != onion_keytype);
bool is_in_range;
int delta = (onion_mode_abs) ? (gpf->framenum - cfra) :
(gpf->runtime.frameid - act_gpf->runtime.frameid);
if (onion_mode_sel) {
is_in_range = (gpf->flag & GP_FRAME_SELECT) != 0;
}
else {
is_in_range = (-delta <= gpd->gstep) && (delta <= gpd->gstep_next);
if (onion_loop && !is_in_range) {
/* We wrap the value using the last frame and 0 as reference. */
/* FIXME: This might not be good for animations not starting at 0. */
int shift = (onion_mode_abs) ? last_gpf->framenum : last_gpf->runtime.frameid;
delta += (delta < 0) ? (shift + 1) : -(shift + 1);
/* Test again with wrapped value. */
is_in_range = (-delta <= gpd->gstep) && (delta <= gpd->gstep_next);
}
}
/* Mask frames that have wrong keytype of are not in range. */
gpf->runtime.onion_id = (is_wrong_keytype || !is_in_range) ? INT_MAX : delta;
}
/* Active frame is always shown. */
act_gpf->runtime.onion_id = 0;
}
sta_gpf = gpl->frames.first;
end_gpf = NULL;
}
else {
/* Bypass multiedit/onion skinning. */
end_gpf = sta_gpf = NULL;
}
if (sta_gpf == NULL && act_gpf == NULL) {
if (layer_cb) {
layer_cb(gpl, act_gpf, NULL, thunk);
}
continue;
}
/* Draw multiedit/onion skinning first */
for (bGPDframe *gpf = sta_gpf; gpf && gpf != end_gpf; gpf = gpf->next) {
if (gpf->runtime.onion_id == INT_MAX || gpf == act_gpf) {
continue;
}
if (layer_cb) {
layer_cb(gpl, gpf, NULL, thunk);
}
LISTBASE_FOREACH (bGPDstroke *, gps, &gpf->strokes) {
stroke_cb(gpl, gpf, gps, thunk);
}
}
/* Draw Active frame on top. */
/* Use evaluated frame (with modifiers for active stroke)/ */
act_gpf = gpl->actframe;
act_gpf->runtime.onion_id = 0;
if (act_gpf) {
if (layer_cb) {
layer_cb(gpl, act_gpf, NULL, thunk);
}
LISTBASE_FOREACH (bGPDstroke *, gps, &act_gpf->strokes) {
stroke_cb(gpl, act_gpf, gps, thunk);
}
}
}
}
void BKE_gpencil_frame_original_pointers_update(const struct bGPDframe *gpf_orig,
const struct bGPDframe *gpf_eval)
{
bGPDstroke *gps_eval = gpf_eval->strokes.first;
LISTBASE_FOREACH (bGPDstroke *, gps_orig, &gpf_orig->strokes) {
/* Assign original stroke pointer. */
if (gps_eval != NULL) {
gps_eval->runtime.gps_orig = gps_orig;
/* Assign original point pointer. */
for (int i = 0; i < gps_orig->totpoints; i++) {
bGPDspoint *pt_eval = &gps_eval->points[i];
pt_eval->runtime.pt_orig = &gps_orig->points[i];
pt_eval->runtime.idx_orig = i;
}
/* Increase pointer. */
gps_eval = gps_eval->next;
}
}
}
void BKE_gpencil_update_orig_pointers(const Object *ob_orig, const Object *ob_eval)
{
bGPdata *gpd_eval = (bGPdata *)ob_eval->data;
bGPdata *gpd_orig = (bGPdata *)ob_orig->data;
/* Assign pointers to the original stroke and points to the evaluated data. This must
* be done before applying any modifier because at this moment the structure is equals,
* so we can assume the layer index is the same in both datablocks.
* This data will be used by operators. */
bGPDlayer *gpl_eval = gpd_eval->layers.first;
LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd_orig->layers) {
if (gpl_eval != NULL) {
/* Update layer reference pointers. */
gpl_eval->runtime.gpl_orig = (bGPDlayer *)gpl;
bGPDframe *gpf_eval = gpl_eval->frames.first;
LISTBASE_FOREACH (bGPDframe *, gpf_orig, &gpl->frames) {
if (gpf_eval != NULL) {
/* Update frame reference pointers. */
gpf_eval->runtime.gpf_orig = (bGPDframe *)gpf_orig;
BKE_gpencil_frame_original_pointers_update(gpf_orig, gpf_eval);
gpf_eval = gpf_eval->next;
}
}
gpl_eval = gpl_eval->next;
}
}
}
void BKE_gpencil_parent_matrix_get(const Depsgraph *depsgraph,
Object *obact,
bGPDlayer *gpl,
float diff_mat[4][4])
{
Object *ob_eval = depsgraph != NULL ? DEG_get_evaluated_object(depsgraph, obact) : obact;
Object *obparent = gpl->parent;
Object *obparent_eval = depsgraph != NULL ? DEG_get_evaluated_object(depsgraph, obparent) :
obparent;
/* if not layer parented, try with object parented */
if (obparent_eval == NULL) {
if (ob_eval != NULL) {
if (ob_eval->type == OB_GPENCIL) {
copy_m4_m4(diff_mat, ob_eval->obmat);
return;
}
}
/* not gpencil object */
unit_m4(diff_mat);
return;
}
else {
if ((gpl->partype == PAROBJECT) || (gpl->partype == PARSKEL)) {
mul_m4_m4m4(diff_mat, obparent_eval->obmat, gpl->inverse);
add_v3_v3(diff_mat[3], ob_eval->obmat[3]);
return;
}
else if (gpl->partype == PARBONE) {
bPoseChannel *pchan = BKE_pose_channel_find_name(obparent_eval->pose, gpl->parsubstr);
if (pchan) {
float tmp_mat[4][4];
mul_m4_m4m4(tmp_mat, obparent_eval->obmat, pchan->pose_mat);
mul_m4_m4m4(diff_mat, tmp_mat, gpl->inverse);
add_v3_v3(diff_mat[3], ob_eval->obmat[3]);
}
else {
/* if bone not found use object (armature) */
mul_m4_m4m4(diff_mat, obparent_eval->obmat, gpl->inverse);
add_v3_v3(diff_mat[3], ob_eval->obmat[3]);
}
return;
}
else {
unit_m4(diff_mat); /* not defined type */
}
}
}
void BKE_gpencil_update_layer_parent(const Depsgraph *depsgraph, Object *ob)
{
if (ob->type != OB_GPENCIL) {
return;
}
bGPdata *gpd = (bGPdata *)ob->data;
bGPDspoint *pt;
int i;
float diff_mat[4][4];
float cur_mat[4][4];
LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
if ((gpl->parent != NULL) && (gpl->actframe != NULL)) {
Object *ob_eval = DEG_get_evaluated_object(depsgraph, gpl->parent);
/* calculate new matrix */
if ((gpl->partype == PAROBJECT) || (gpl->partype == PARSKEL)) {
invert_m4_m4(cur_mat, ob_eval->obmat);
}
else if (gpl->partype == PARBONE) {
bPoseChannel *pchan = BKE_pose_channel_find_name(ob_eval->pose, gpl->parsubstr);
if (pchan) {
float tmp_mat[4][4];
mul_m4_m4m4(tmp_mat, ob_eval->obmat, pchan->pose_mat);
invert_m4_m4(cur_mat, tmp_mat);
}
}
/* only redo if any change */
if (!equals_m4m4(gpl->inverse, cur_mat)) {
/* first apply current transformation to all strokes */
BKE_gpencil_parent_matrix_get(depsgraph, ob, gpl, diff_mat);
/* undo local object */
sub_v3_v3(diff_mat[3], ob->obmat[3]);
LISTBASE_FOREACH (bGPDstroke *, gps, &gpl->actframe->strokes) {
for (i = 0, pt = gps->points; i < gps->totpoints; i++, pt++) {
mul_m4_v3(diff_mat, &pt->x);
}
}
/* set new parent matrix */
copy_m4_m4(gpl->inverse, cur_mat);
}
}
}
}
/** \} */
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