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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* 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) 2011 by Bastien Montagne.
* All rights reserved.
*
* Contributor(s): None yet.
*
* ***** END GPL LICENSE BLOCK *****
*
*/
/** \file blender/modifiers/intern/MOD_weightvg_util.c
* \ingroup modifiers
*/
#include "BLI_math.h"
#include "BLI_rand.h"
#include "BLI_string.h"
#include "BLI_utildefines.h"
#include "DNA_color_types.h" /* CurveMapping. */
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_modifier_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "BKE_cdderivedmesh.h"
#include "BKE_colortools.h" /* CurveMapping. */
#include "BKE_deform.h"
#include "BKE_mesh.h"
#include "BKE_modifier.h"
#include "BKE_texture.h" /* Texture masking. */
#include "depsgraph_private.h"
#include "MEM_guardedalloc.h"
#include "MOD_util.h"
#include "MOD_weightvg_util.h"
#include "RE_shader_ext.h" /* Texture masking. */
/* Maps new_w weights in place, using either one of the predefined functions, or a custom curve.
* Return values are in new_w.
* If indices is not NULL, it must be a table of same length as org_w and new_w, mapping to the real
* vertex index (in case the weight tables do not cover the whole vertices...).
* cmap might be NULL, in which case curve mapping mode will return unmodified data.
*/
void weightvg_do_map(int num, float *new_w, short falloff_type, CurveMapping *cmap, RNG *rng)
{
int i;
/* Return immediately, if we have nothing to do! */
/* Also security checks... */
if (((falloff_type == MOD_WVG_MAPPING_CURVE) && (cmap == NULL)) ||
!ELEM7(falloff_type, MOD_WVG_MAPPING_CURVE, MOD_WVG_MAPPING_SHARP, MOD_WVG_MAPPING_SMOOTH,
MOD_WVG_MAPPING_ROOT, MOD_WVG_MAPPING_SPHERE, MOD_WVG_MAPPING_RANDOM,
MOD_WVG_MAPPING_STEP))
{
return;
}
if (cmap && falloff_type == MOD_WVG_MAPPING_CURVE) {
curvemapping_initialize(cmap);
}
/* Map each weight (vertex) to its new value, accordingly to the chosen mode. */
for (i = 0; i < num; ++i) {
float fac = new_w[i];
/* Code borrowed from the warp modifier. */
/* Closely matches PROP_SMOOTH and similar. */
switch (falloff_type) {
case MOD_WVG_MAPPING_CURVE:
fac = curvemapping_evaluateF(cmap, 0, fac);
break;
case MOD_WVG_MAPPING_SHARP:
fac = fac * fac;
break;
case MOD_WVG_MAPPING_SMOOTH:
fac = 3.0f * fac * fac - 2.0f * fac * fac * fac;
break;
case MOD_WVG_MAPPING_ROOT:
fac = (float)sqrt(fac);
break;
case MOD_WVG_MAPPING_SPHERE:
fac = (float)sqrt(2 * fac - fac * fac);
break;
case MOD_WVG_MAPPING_RANDOM:
fac = BLI_rng_get_float(rng) * fac;
break;
case MOD_WVG_MAPPING_STEP:
fac = (fac >= 0.5f) ? 1.0f : 0.0f;
break;
}
new_w[i] = fac;
}
}
/* Applies new_w weights to org_w ones, using either a texture, vgroup or constant value as factor.
* Return values are in org_w.
* If indices is not NULL, it must be a table of same length as org_w and new_w, mapping to the real
* vertex index (in case the weight tables do not cover the whole vertices...).
* XXX The standard "factor" value is assumed in [0.0, 1.0] range. Else, weird results might appear.
*/
void weightvg_do_mask(int num, const int *indices, float *org_w, const float *new_w,
Object *ob, DerivedMesh *dm, float fact, const char defgrp_name[MAX_VGROUP_NAME],
Scene *scene, Tex *texture, int tex_use_channel, int tex_mapping,
Object *tex_map_object, const char *tex_uvlayer_name)
{
int ref_didx;
int i;
/* If influence factor is null, nothing to do! */
if (fact == 0.0f) return;
/* If we want to mask vgroup weights from a texture. */
if (texture) {
/* The texture coordinates. */
float (*tex_co)[3];
/* See mapping note below... */
MappingInfoModifierData t_map;
float (*v_co)[3];
int numVerts = dm->getNumVerts(dm);
/* Use new generic get_texture_coords, but do not modify our DNA struct for it...
* XXX Why use a ModifierData stuff here ? Why not a simple, generic struct for parameters ?
* What e.g. if a modifier wants to use several textures ?
* Why use only v_co, and not MVert (or both) ?
*/
t_map.texture = texture;
t_map.map_object = tex_map_object;
BLI_strncpy(t_map.uvlayer_name, tex_uvlayer_name, sizeof(t_map.uvlayer_name));
t_map.texmapping = tex_mapping;
v_co = MEM_mallocN(sizeof(*v_co) * numVerts, "WeightVG Modifier, TEX mode, v_co");
dm->getVertCos(dm, v_co);
tex_co = MEM_callocN(sizeof(*tex_co) * numVerts, "WeightVG Modifier, TEX mode, tex_co");
get_texture_coords(&t_map, ob, dm, v_co, tex_co, num);
MEM_freeN(v_co);
modifier_init_texture(scene, texture);
/* For each weight (vertex), make the mix between org and new weights. */
for (i = 0; i < num; ++i) {
int idx = indices ? indices[i] : i;
TexResult texres;
float hsv[3]; /* For HSV color space. */
bool do_color_manage;
do_color_manage = tex_use_channel != MOD_WVG_MASK_TEX_USE_INT;
texres.nor = NULL;
get_texture_value(scene, texture, tex_co[idx], &texres, do_color_manage);
/* Get the good channel value... */
switch (tex_use_channel) {
case MOD_WVG_MASK_TEX_USE_INT:
org_w[i] = (new_w[i] * texres.tin * fact) + (org_w[i] * (1.0f - (texres.tin * fact)));
break;
case MOD_WVG_MASK_TEX_USE_RED:
org_w[i] = (new_w[i] * texres.tr * fact) + (org_w[i] * (1.0f - (texres.tr * fact)));
break;
case MOD_WVG_MASK_TEX_USE_GREEN:
org_w[i] = (new_w[i] * texres.tg * fact) + (org_w[i] * (1.0f - (texres.tg * fact)));
break;
case MOD_WVG_MASK_TEX_USE_BLUE:
org_w[i] = (new_w[i] * texres.tb * fact) + (org_w[i] * (1.0f - (texres.tb * fact)));
break;
case MOD_WVG_MASK_TEX_USE_HUE:
rgb_to_hsv_v(&texres.tr, hsv);
org_w[i] = (new_w[i] * hsv[0] * fact) + (org_w[i] * (1.0f - (hsv[0] * fact)));
break;
case MOD_WVG_MASK_TEX_USE_SAT:
rgb_to_hsv_v(&texres.tr, hsv);
org_w[i] = (new_w[i] * hsv[1] * fact) + (org_w[i] * (1.0f - (hsv[1] * fact)));
break;
case MOD_WVG_MASK_TEX_USE_VAL:
rgb_to_hsv_v(&texres.tr, hsv);
org_w[i] = (new_w[i] * hsv[2] * fact) + (org_w[i] * (1.0f - (hsv[2] * fact)));
break;
case MOD_WVG_MASK_TEX_USE_ALPHA:
org_w[i] = (new_w[i] * texres.ta * fact) + (org_w[i] * (1.0f - (texres.ta * fact)));
break;
default:
org_w[i] = (new_w[i] * texres.tin * fact) + (org_w[i] * (1.0f - (texres.tin * fact)));
break;
}
}
MEM_freeN(tex_co);
}
else if ((ref_didx = defgroup_name_index(ob, defgrp_name)) != -1) {
MDeformVert *dvert = NULL;
/* Check whether we want to set vgroup weights from a constant weight factor or a vertex
* group.
*/
/* Get vgroup idx from its name. */
/* Proceed only if vgroup is valid, else use constant factor. */
/* Get actual dverts (ie vertex group data). */
dvert = dm->getVertDataArray(dm, CD_MDEFORMVERT);
/* Proceed only if vgroup is valid, else assume factor = O. */
if (dvert == NULL) return;
/* For each weight (vertex), make the mix between org and new weights. */
for (i = 0; i < num; i++) {
int idx = indices ? indices[i] : i;
const float f = defvert_find_weight(&dvert[idx], ref_didx) * fact;
org_w[i] = (new_w[i] * f) + (org_w[i] * (1.0f - f));
/* If that vertex is not in ref vgroup, assume null factor, and hence do nothing! */
}
}
else {
/* Default "influence" behavior. */
/* For each weight (vertex), make the mix between org and new weights. */
const float ifact = 1.0f - fact;
for (i = 0; i < num; i++) {
org_w[i] = (new_w[i] * fact) + (org_w[i] * ifact);
}
}
}
/* Applies weights to given vgroup (defgroup), and optionally add/remove vertices from the group.
* If dws is not NULL, it must be an array of MDeformWeight pointers of same length as weights (and
* defgrp_idx can then have any value).
* If indices is not NULL, it must be an array of same length as weights, mapping to the real
* vertex index (in case the weight array does not cover the whole vertices...).
*/
void weightvg_update_vg(MDeformVert *dvert, int defgrp_idx, MDeformWeight **dws, int num,
const int *indices, const float *weights, int do_add,
float add_thresh, int do_rem, float rem_thresh)
{
int i;
for (i = 0; i < num; i++) {
float w = weights[i];
MDeformVert *dv = &dvert[indices ? indices[i] : i];
MDeformWeight *dw = dws ? dws[i] : defvert_find_index(dv, defgrp_idx);
/* Never allow weights out of [0.0, 1.0] range. */
CLAMP(w, 0.0f, 1.0f);
/* If the vertex is in this vgroup, remove it if needed, or just update it. */
if (dw != NULL) {
if (do_rem && w < rem_thresh) {
defvert_remove_group(dv, dw);
}
else {
dw->weight = w;
}
}
/* Else, add it if needed! */
else if (do_add && w > add_thresh) {
defvert_add_index_notest(dv, defgrp_idx, w);
}
}
}
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