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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.
*/
/** \file
* \ingroup modifiers
*/
#include "MEM_guardedalloc.h"
#include "BLI_utildefines.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_object_types.h"
#include "BKE_modifier.h"
#include "BKE_mesh.h"
#include "bmesh.h"
#include "bmesh_tools.h"
#include "MOD_modifiertypes.h"
static Mesh *triangulate_mesh(Mesh *mesh,
const int quad_method,
const int ngon_method,
const int min_vertices,
const int flag)
{
Mesh *result;
BMesh *bm;
int total_edges, i;
MEdge *me;
CustomData_MeshMasks cddata_masks = {
.vmask = CD_MASK_ORIGINDEX, .emask = CD_MASK_ORIGINDEX, .pmask = CD_MASK_ORIGINDEX};
bool keep_clnors = (flag & MOD_TRIANGULATE_KEEP_CUSTOMLOOP_NORMALS) != 0;
if (keep_clnors) {
BKE_mesh_calc_normals_split(mesh);
/* We need that one to 'survive' to/from BMesh conversions. */
CustomData_clear_layer_flag(&mesh->ldata, CD_NORMAL, CD_FLAG_TEMPORARY);
cddata_masks.lmask |= CD_MASK_NORMAL;
}
bm = BKE_mesh_to_bmesh_ex(mesh,
&((struct BMeshCreateParams){0}),
&((struct BMeshFromMeshParams){
.calc_face_normal = true,
.cd_mask_extra = cddata_masks,
}));
BM_mesh_triangulate(bm, quad_method, ngon_method, min_vertices, false, NULL, NULL, NULL);
result = BKE_mesh_from_bmesh_for_eval_nomain(bm, &cddata_masks, mesh);
BM_mesh_free(bm);
if (keep_clnors) {
float(*lnors)[3] = CustomData_get_layer(&result->ldata, CD_NORMAL);
BLI_assert(lnors != NULL);
BKE_mesh_set_custom_normals(result, lnors);
/* Do some cleanup, we do not want those temp data to stay around. */
CustomData_set_layer_flag(&mesh->ldata, CD_NORMAL, CD_FLAG_TEMPORARY);
CustomData_set_layer_flag(&result->ldata, CD_NORMAL, CD_FLAG_TEMPORARY);
}
total_edges = result->totedge;
me = result->medge;
/* force drawing of all edges (seems to be omitted in CDDM_from_bmesh) */
for (i = 0; i < total_edges; i++, me++) {
me->flag |= ME_EDGEDRAW | ME_EDGERENDER;
}
result->runtime.cd_dirty_vert |= CD_MASK_NORMAL;
return result;
}
static void initData(ModifierData *md)
{
TriangulateModifierData *tmd = (TriangulateModifierData *)md;
/* Enable in editmode by default */
md->mode |= eModifierMode_Editmode;
tmd->quad_method = MOD_TRIANGULATE_QUAD_SHORTEDGE;
tmd->ngon_method = MOD_TRIANGULATE_NGON_BEAUTY;
tmd->min_vertices = 4;
}
static Mesh *applyModifier(ModifierData *md, const ModifierEvalContext *UNUSED(ctx), Mesh *mesh)
{
TriangulateModifierData *tmd = (TriangulateModifierData *)md;
Mesh *result;
if (!(result = triangulate_mesh(
mesh, tmd->quad_method, tmd->ngon_method, tmd->min_vertices, tmd->flag))) {
return mesh;
}
return result;
}
ModifierTypeInfo modifierType_Triangulate = {
/* name */ "Triangulate",
/* structName */ "TriangulateModifierData",
/* structSize */ sizeof(TriangulateModifierData),
/* type */ eModifierTypeType_Constructive,
/* flags */ eModifierTypeFlag_AcceptsMesh | eModifierTypeFlag_SupportsEditmode |
eModifierTypeFlag_SupportsMapping | eModifierTypeFlag_EnableInEditmode |
eModifierTypeFlag_AcceptsCVs,
/* copyData */ modifier_copyData_generic,
/* deformVerts */ NULL,
/* deformMatrices */ NULL,
/* deformVertsEM */ NULL,
/* deformMatricesEM */ NULL,
/* applyModifier */ applyModifier,
/* initData */ initData,
/* requiredDataMask */ NULL, // requiredDataMask,
/* freeData */ NULL,
/* isDisabled */ NULL,
/* updateDepsgraph */ NULL,
/* dependsOnTime */ NULL,
/* dependsOnNormals */ NULL,
/* foreachObjectLink */ NULL,
/* foreachIDLink */ NULL,
/* freeRuntimeData */ NULL,
};
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