Bastien Montagne
993f43dc9e
Now it will be simpler for code jsut wanting to preserve custom normals around to set them, without having to add same boiler plate code all the time around actual code.
152 lines
4.4 KiB
C
152 lines
4.4 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/** \file
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* \ingroup modifiers
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*/
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#include "MEM_guardedalloc.h"
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#include "BLI_utildefines.h"
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#include "DNA_mesh_types.h"
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#include "DNA_meshdata_types.h"
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#include "DNA_object_types.h"
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#include "BKE_modifier.h"
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#include "BKE_mesh.h"
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#include "bmesh.h"
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#include "bmesh_tools.h"
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#include "MOD_modifiertypes.h"
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static Mesh *triangulate_mesh(Mesh *mesh, const int quad_method, const int ngon_method, const int flag)
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{
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Mesh *result;
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BMesh *bm;
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int total_edges, i;
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MEdge *me;
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CustomDataMask cddata_masks = CD_MASK_ORIGINDEX;
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bool keep_clnors = (flag & MOD_TRIANGULATE_KEEP_CUSTOMLOOP_NORMALS) != 0;
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if (keep_clnors) {
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BKE_mesh_calc_normals_split(mesh);
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/* We need that one to 'survive' to/from BMesh conversions. */
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CustomData_clear_layer_flag(&mesh->ldata, CD_NORMAL, CD_FLAG_TEMPORARY);
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cddata_masks |= CD_MASK_NORMAL; /* TODO: once D4421 is in, only request CD_NORMAL on loop data... */
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}
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bm = BKE_mesh_to_bmesh_ex(
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mesh,
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&((struct BMeshCreateParams){0}),
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&((struct BMeshFromMeshParams){
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.calc_face_normal = true,
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.cd_mask_extra = cddata_masks,
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}));
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BM_mesh_triangulate(bm, quad_method, ngon_method, false, NULL, NULL, NULL);
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result = BKE_mesh_from_bmesh_for_eval_nomain(bm, cddata_masks);
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BM_mesh_free(bm);
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if (keep_clnors) {
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float (*lnors)[3] = CustomData_get_layer(&result->ldata, CD_NORMAL);
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BLI_assert(lnors != NULL);
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BKE_mesh_set_custom_normals(result, lnors);
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/* Do some cleanup, we do not want those temp data to stay around. */
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CustomData_set_layer_flag(&mesh->ldata, CD_NORMAL, CD_FLAG_TEMPORARY);
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CustomData_set_layer_flag(&result->ldata, CD_NORMAL, CD_FLAG_TEMPORARY);
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}
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total_edges = result->totedge;
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me = result->medge;
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/* force drawing of all edges (seems to be omitted in CDDM_from_bmesh) */
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for (i = 0; i < total_edges; i++, me++) {
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me->flag |= ME_EDGEDRAW | ME_EDGERENDER;
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}
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result->runtime.cd_dirty_vert |= CD_MASK_NORMAL;
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return result;
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}
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static void initData(ModifierData *md)
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{
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TriangulateModifierData *tmd = (TriangulateModifierData *)md;
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/* Enable in editmode by default */
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md->mode |= eModifierMode_Editmode;
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tmd->quad_method = MOD_TRIANGULATE_QUAD_SHORTEDGE;
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tmd->ngon_method = MOD_TRIANGULATE_NGON_BEAUTY;
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}
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static Mesh *applyModifier(
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ModifierData *md,
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const ModifierEvalContext *UNUSED(ctx),
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Mesh *mesh)
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{
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TriangulateModifierData *tmd = (TriangulateModifierData *)md;
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Mesh *result;
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if (!(result = triangulate_mesh(mesh, tmd->quad_method, tmd->ngon_method, tmd->flag))) {
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return mesh;
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}
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return result;
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}
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ModifierTypeInfo modifierType_Triangulate = {
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/* name */ "Triangulate",
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/* structName */ "TriangulateModifierData",
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/* structSize */ sizeof(TriangulateModifierData),
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/* type */ eModifierTypeType_Constructive,
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/* flags */ eModifierTypeFlag_AcceptsMesh |
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eModifierTypeFlag_SupportsEditmode |
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eModifierTypeFlag_SupportsMapping |
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eModifierTypeFlag_EnableInEditmode |
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eModifierTypeFlag_AcceptsCVs,
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/* copyData */ modifier_copyData_generic,
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/* deformVerts_DM */ NULL,
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/* deformMatrices_DM */ NULL,
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/* deformVertsEM_DM */ NULL,
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/* deformMatricesEM_DM*/NULL,
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/* applyModifier_DM */ NULL,
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/* deformVerts */ NULL,
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/* deformMatrices */ NULL,
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/* deformVertsEM */ NULL,
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/* deformMatricesEM */ NULL,
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/* applyModifier */ applyModifier,
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/* initData */ initData,
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/* requiredDataMask */ NULL, //requiredDataMask,
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/* freeData */ NULL,
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/* isDisabled */ NULL,
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/* updateDepsgraph */ NULL,
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/* dependsOnTime */ NULL,
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/* dependsOnNormals */ NULL,
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/* foreachObjectLink */ NULL,
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/* foreachIDLink */ NULL,
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};
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