53 lines
1.7 KiB
C++
53 lines
1.7 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright 2018 Blender Foundation. All rights reserved. */
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/** \file
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* \ingroup bke
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*/
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#include "BKE_mesh.h"
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#include "BKE_subdiv_ccg.h"
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#include "MEM_guardedalloc.h"
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#include "DNA_mesh_types.h"
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#include "DNA_meshdata_types.h"
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struct CCGMaterialFromMeshData {
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const Mesh *mesh;
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const MPoly *polys;
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const int *material_indices;
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};
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static DMFlagMat subdiv_ccg_material_flags_eval(
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SubdivCCGMaterialFlagsEvaluator *material_flags_evaluator, const int coarse_face_index)
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{
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CCGMaterialFromMeshData *data = (CCGMaterialFromMeshData *)material_flags_evaluator->user_data;
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BLI_assert(coarse_face_index < data->mesh->totpoly);
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const MPoly *poly = &data->polys[coarse_face_index];
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DMFlagMat material_flags;
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material_flags.flag = poly->flag;
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material_flags.mat_nr = data->material_indices ? data->material_indices[coarse_face_index] : 0;
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return material_flags;
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}
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static void subdiv_ccg_material_flags_free(
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SubdivCCGMaterialFlagsEvaluator *material_flags_evaluator)
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{
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MEM_freeN(material_flags_evaluator->user_data);
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}
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void BKE_subdiv_ccg_material_flags_init_from_mesh(
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SubdivCCGMaterialFlagsEvaluator *material_flags_evaluator, const Mesh *mesh)
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{
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CCGMaterialFromMeshData *data = static_cast<CCGMaterialFromMeshData *>(
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MEM_mallocN(sizeof(CCGMaterialFromMeshData), __func__));
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data->mesh = mesh;
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data->material_indices = (const int *)CustomData_get_layer_named(
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&mesh->pdata, CD_PROP_INT32, "material_index");
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data->polys = BKE_mesh_polys(mesh);
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material_flags_evaluator->eval_material_flags = subdiv_ccg_material_flags_eval;
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material_flags_evaluator->free = subdiv_ccg_material_flags_free;
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material_flags_evaluator->user_data = data;
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}
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