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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.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/editors/sculpt_paint/paint_vertex_color_ops.c
* \ingroup edsculpt
*/
#include "MEM_guardedalloc.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_object_types.h"
#include "BKE_context.h"
#include "BKE_mesh.h"
#include "BKE_deform.h"
#include "DEG_depsgraph.h"
#include "WM_api.h"
#include "WM_types.h"
#include "ED_mesh.h"
#include "paint_intern.h" /* own include */
static int vertex_weight_paint_mode_poll(bContext *C)
{
Object *ob = CTX_data_active_object(C);
Mesh *me = BKE_mesh_from_object(ob);
return (ob && (ob->mode == OB_MODE_VERTEX_PAINT || ob->mode == OB_MODE_WEIGHT_PAINT)) &&
(me && me->totpoly && me->dvert);
}
static bool vertex_paint_from_weight(bContext *C)
{
Object *ob = CTX_data_active_object(C);
Mesh *me;
const MPoly *mp;
int vgroup_active;
if (((me = BKE_mesh_from_object(ob)) == NULL ||
(ED_mesh_color_ensure(me, NULL)) == false))
{
return false;
}
/* TODO: respect selection. */
mp = me->mpoly;
vgroup_active = ob->actdef - 1;
for (int i = 0; i < me->totpoly; i++, mp++) {
MLoopCol *lcol = &me->mloopcol[mp->loopstart];
uint j = 0;
do{
uint vidx = me->mloop[mp->loopstart + j].v;
const float weight = defvert_find_weight(&me->dvert[vidx], vgroup_active);
const uchar grayscale = weight * 255;
lcol->r = grayscale;
lcol->b = grayscale;
lcol->g = grayscale;
lcol++;
j++;
} while (j < mp->totloop);
}
DEG_id_tag_update(&ob->id, OB_RECALC_DATA);
WM_event_add_notifier(C, NC_OBJECT | ND_DRAW, ob);
return true;
}
static int vertex_paint_from_weight_exec(bContext *C, wmOperator *UNUSED(op))
{
if (vertex_paint_from_weight(C)) {
return OPERATOR_FINISHED;
}
return OPERATOR_CANCELLED;
}
void PAINT_OT_vertex_color_from_weight(wmOperatorType *ot)
{
/* identifiers */
ot->name = "Vertex Color from Weight";
ot->idname = "PAINT_OT_vertex_color_from_weight";
ot->description = "Converts active weight into greyscale vertex colors";
/* api callback */
ot->exec = vertex_paint_from_weight_exec;
ot->poll = vertex_weight_paint_mode_poll;
/* flags */
ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
/* TODO: invert, alpha */
}
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