Fix T55540 Add foreachMappedXXX equivalent API for evaluated meshes

Referenced by issue #55540, Add foreachMappedXXX equivalent API for evaluated meshes?

source/blender/blenkernel/BKE_mesh_iterators.h

@@ -0,0 +1,65 @@
+/*
+ * ***** 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: all of this file.
+ *
+ * Contributor(s): Blender Foundation
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+#ifndef __BKE_MESH_ITERATORS_H__
+#define __BKE_MESH_ITERATORS_H__
+
+/** \file BKE_MESH_ITERATORS.h
+ *  \ingroup bke
+ */
+
+struct Mesh;
+struct MVert;
+struct MEdge;
+struct MPoly;
+struct MLoop;
+struct MLoopUV;
+struct MLoopTri;
+
+typedef enum MeshForeachFlag {
+	MESH_FOREACH_NOP = 0,
+	MESH_FOREACH_USE_NORMAL = (1 << 0),  /* foreachMappedVert, foreachMappedLoop, foreachMappedFaceCenter */
+} MeshForeachFlag;
+
+
+void BKE_mesh_foreach_mapped_vert(
+        struct Mesh *mesh,
+        void (*func)(void *userData, int index, const float co[3], const float no_f[3], const short no_s[3]),
+        void *userData,
+        MeshForeachFlag flag);
+void BKE_mesh_foreach_mapped_edge(
+        struct Mesh *mesh,
+        void (*func)(void *userData, int index, const float v0co[3], const float v1co[3]),
+        void *userData);
+void BKE_mesh_foreach_mapped_loop(
+        struct Mesh *mesh,
+        void (*func)(void *userData, int vertex_index, int face_index, const float co[3], const float no[3]),
+        void *userData,
+        MeshForeachFlag flag);
+void BKE_mesh_foreach_mapped_face_center(
+        struct Mesh *mesh,
+        void (*func)(void *userData, int index, const float cent[3], const float no[3]),
+        void *userData,
+        MeshForeachFlag flag);
+
+#endif  /* __BKE_MESH_ITERATORS_H__ */

source/blender/blenkernel/CMakeLists.txt

@@ -140,6 +140,7 @@ set(SRC
 	intern/mesh.c
 	intern/mesh_convert.c
 	intern/mesh_evaluate.c
+	intern/mesh_iterators.c
 	intern/mesh_mapping.c
 	intern/mesh_merge.c
 	intern/mesh_remap.c
@@ -272,6 +273,7 @@ set(SRC
 	BKE_mball.h
 	BKE_mball_tessellate.h
 	BKE_mesh.h
+	BKE_mesh_iterators.h
 	BKE_mesh_mapping.h
 	BKE_mesh_remap.h
 	BKE_mesh_tangent.h

source/blender/blenkernel/intern/mesh_iterators.c

@@ -0,0 +1,154 @@
+/*
+ * ***** 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.
+ *
+ * Contributor(s): Blender Foundation
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+/** \file blender/blenkernel/intern/mesh_iterators.c
+ *  \ingroup bke
+ *
+ * Functions for iterating mesh features.
+ */
+
+#include "DNA_mesh_types.h"
+#include "DNA_meshdata_types.h"
+
+#include "BKE_customdata.h"
+#include "BKE_mesh.h"
+#include "BKE_mesh_iterators.h"
+
+
+/* Copied from cdDM_foreachMappedVert */
+void BKE_mesh_foreach_mapped_vert(
+        Mesh *mesh,
+        void (*func)(void *userData, int index, const float co[3], const float no_f[3], const short no_s[3]),
+        void *userData,
+        MeshForeachFlag flag)
+{
+	MVert *mv = mesh->mvert;
+	const int *index = CustomData_get_layer(&mesh->vdata, CD_ORIGINDEX);
+	int i;
+
+	if (index) {
+		for (i = 0; i < mesh->totvert; i++, mv++) {
+			const short *no = (flag & MESH_FOREACH_USE_NORMAL) ? mv->no : NULL;
+			const int orig = *index++;
+			if (orig == ORIGINDEX_NONE) continue;
+			func(userData, orig, mv->co, NULL, no);
+		}
+	}
+	else {
+		for (i = 0; i < mesh->totvert; i++, mv++) {
+			const short *no = (flag & MESH_FOREACH_USE_NORMAL) ? mv->no : NULL;
+			func(userData, i, mv->co, NULL, no);
+		}
+	}
+}
+
+/* Copied from cdDM_foreachMappedEdge */
+void BKE_mesh_foreach_mapped_edge(
+        Mesh *mesh,
+        void (*func)(void *userData, int index, const float v0co[3], const float v1co[3]),
+        void *userData)
+{
+	MVert *mv = mesh->mvert;
+	MEdge *med = mesh->medge;
+	int i, orig, *index = CustomData_get_layer(&mesh->edata, CD_ORIGINDEX);
+
+	for (i = 0; i < mesh->totedge; i++, med++) {
+		if (index) {
+			orig = *index++;
+			if (orig == ORIGINDEX_NONE) continue;
+			func(userData, orig, mv[med->v1].co, mv[med->v2].co);
+		}
+		else
+			func(userData, i, mv[med->v1].co, mv[med->v2].co);
+	}
+}
+
+/* Copied from cdDM_foreachMappedLoop */
+void BKE_mesh_foreach_mapped_loop(
+        Mesh *mesh,
+        void (*func)(void *userData, int vertex_index, int face_index, const float co[3], const float no[3]),
+        void *userData,
+        MeshForeachFlag flag)
+{
+	/* We can't use dm->getLoopDataLayout(dm) here, we want to always access dm->loopData, EditDerivedBMesh would
+	 * return loop data from bmesh itself. */
+	const float (*lnors)[3] = (flag & MESH_FOREACH_USE_NORMAL) ? CustomData_get_layer(&mesh->ldata, CD_NORMAL) : NULL;
+
+	const MVert *mv = mesh->mvert;
+	const MLoop *ml = mesh->mloop;
+	const MPoly *mp = mesh->mpoly;
+	const int *v_index = CustomData_get_layer(&mesh->vdata, CD_ORIGINDEX);
+	const int *f_index = CustomData_get_layer(&mesh->pdata, CD_ORIGINDEX);
+	int p_idx, i;
+
+	for (p_idx = 0; p_idx < mesh->totpoly; ++p_idx, ++mp) {
+		for (i = 0; i < mp->totloop; ++i, ++ml) {
+			const int v_idx = v_index ? v_index[ml->v] : ml->v;
+			const int f_idx = f_index ? f_index[p_idx] : p_idx;
+			const float *no = lnors ? *lnors++ : NULL;
+			if (!ELEM(ORIGINDEX_NONE, v_idx, f_idx)) {
+				func(userData, v_idx, f_idx, mv[ml->v].co, no);
+			}
+		}
+	}
+}
+
+/* Copied from cdDM_foreachMappedFaceCenter */
+void BKE_mesh_foreach_mapped_face_center(
+        Mesh *mesh,
+        void (*func)(void *userData, int index, const float cent[3], const float no[3]),
+        void *userData,
+        MeshForeachFlag flag)
+{
+	MVert *mvert = mesh->mvert;
+	MPoly *mp;
+	MLoop *ml;
+	int i, orig, *index;
+
+	index = CustomData_get_layer(&mesh->pdata, CD_ORIGINDEX);
+	mp = mesh->mpoly;
+	for (i = 0; i < mesh->totpoly; i++, mp++) {
+		float cent[3];
+		float *no, _no[3];
+
+		if (index) {
+			orig = *index++;
+			if (orig == ORIGINDEX_NONE) continue;
+		}
+		else {
+			orig = i;
+		}
+
+		ml = &mesh->mloop[mp->loopstart];
+		BKE_mesh_calc_poly_center(mp, ml, mvert, cent);
+
+		if (flag & MESH_FOREACH_USE_NORMAL) {
+			BKE_mesh_calc_poly_normal(mp, ml, mvert, (no = _no));
+		}
+		else {
+			no = NULL;
+		}
+
+		func(userData, orig, cent, no);
+	}
+
+}