diff options
Diffstat (limited to 'source/blender/blenkernel/intern/subdiv_converter_mesh.c')
| -rw-r--r-- | source/blender/blenkernel/intern/subdiv_converter_mesh.c | 471 |
1 files changed, 471 insertions, 0 deletions
diff --git a/source/blender/blenkernel/intern/subdiv_converter_mesh.c b/source/blender/blenkernel/intern/subdiv_converter_mesh.c new file mode 100644 index 00000000000..1a2c26b3564 --- /dev/null +++ b/source/blender/blenkernel/intern/subdiv_converter_mesh.c @@ -0,0 +1,471 @@ +/* + * ***** 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 Copyright (C) 2018 by Blender Foundation. + * All rights reserved. + * + * Contributor(s): Sergey Sharybin. + * + * ***** END GPL LICENSE BLOCK ***** + */ + +#include "subdiv_converter.h" + +#include <string.h> + +#include "DNA_mesh_types.h" +#include "DNA_meshdata_types.h" + +#include "BLI_utildefines.h" +#include "BLI_math_vector.h" + +#include "BKE_customdata.h" +#include "BKE_mesh_mapping.h" +#include "BKE_subdiv.h" + +#include "MEM_guardedalloc.h" + +#ifdef WITH_OPENSUBDIV +# include "opensubdiv_capi.h" +# include "opensubdiv_converter_capi.h" +#endif + +/* Use mesh element mapping structures during conversion. + * Uses more memory but is much faster than naive algorithm. + */ +#define USE_MESH_ELEMENT_MAPPING + +#ifdef WITH_OPENSUBDIV +typedef struct ConverterStorage { + SubdivSettings settings; + const Mesh *mesh; + +#ifdef USE_MESH_ELEMENT_MAPPING + MeshElemMap *vert_edge_map; + MeshElemMap *vert_poly_map; + MeshElemMap *edge_poly_map; + int *vert_edge_mem; + int *vert_poly_mem; + int *edge_poly_mem; +#endif + + /* Indexed by loop index, value denotes index of face-varying vertex + * which corresponds to the UV coordinate. + */ + int *loop_uv_indices; + int num_uv_coordinates; +} ConverterStorage; + +static OpenSubdiv_SchemeType get_scheme_type( + const OpenSubdiv_Converter *converter) +{ + ConverterStorage *storage = converter->user_data; + if (storage->settings.is_simple) { + return OSD_SCHEME_BILINEAR; + } + else { + return OSD_SCHEME_CATMARK; + } +} + +static OpenSubdiv_FVarLinearInterpolation get_fvar_linear_interpolation( + const OpenSubdiv_Converter *converter) +{ + ConverterStorage *storage = converter->user_data; + return BKE_subdiv_converter_fvar_linear_from_settings(&storage->settings); +} + +static int get_num_faces(const OpenSubdiv_Converter *converter) +{ + ConverterStorage *storage = converter->user_data; + return storage->mesh->totpoly; +} + +static int get_num_edges(const OpenSubdiv_Converter *converter) +{ + ConverterStorage *storage = converter->user_data; + return storage->mesh->totedge; +} + +static int get_num_verts(const OpenSubdiv_Converter *converter) +{ + ConverterStorage *storage = converter->user_data; + return storage->mesh->totvert; +} + +static int get_num_face_verts(const OpenSubdiv_Converter *converter, int face) +{ + ConverterStorage *storage = converter->user_data; + return storage->mesh->mpoly[face].totloop; +} + +static void get_face_verts(const OpenSubdiv_Converter *converter, + int face, + int *face_verts) +{ + ConverterStorage *storage = converter->user_data; + const MPoly *mp = &storage->mesh->mpoly[face]; + const MLoop *mloop = storage->mesh->mloop; + for (int loop = 0; loop < mp->totloop; loop++) { + face_verts[loop] = mloop[mp->loopstart + loop].v; + } +} + +static void get_face_edges(const OpenSubdiv_Converter *converter, + int face, + int *face_edges) +{ + ConverterStorage *storage = converter->user_data; + const MPoly *mp = &storage->mesh->mpoly[face]; + const MLoop *mloop = storage->mesh->mloop; + for (int loop = 0; loop < mp->totloop; loop++) { + face_edges[loop] = mloop[mp->loopstart + loop].e; + } +} + +static void get_edge_verts(const OpenSubdiv_Converter *converter, + int edge, + int *edge_verts) +{ + ConverterStorage *storage = converter->user_data; + const MEdge *me = &storage->mesh->medge[edge]; + edge_verts[0] = me->v1; + edge_verts[1] = me->v2; +} + +static int get_num_edge_faces(const OpenSubdiv_Converter *converter, int edge) +{ + ConverterStorage *storage = converter->user_data; +#ifdef USE_MESH_ELEMENT_MAPPING + return storage->edge_poly_map[edge].count; +#else + const Mesh *mesh = storage->mesh; + const MPoly *mpoly = mesh->mpoly; + const MLoop *mloop = mesh->mloop; + int num = 0; + for (int poly = 0; poly < mesh->totpoly; poly++) { + const MPoly *mp = &mpoly[poly]; + for (int loop = 0; loop < mp->totloop; loop++) { + const MLoop *ml = &mloop[mp->loopstart + loop]; + if (ml->e == edge) { + ++num; + break; + } + } + } + return num; +#endif +} + +static void get_edge_faces(const OpenSubdiv_Converter *converter, + int edge, + int *edge_faces) +{ + ConverterStorage *storage = converter->user_data; +#ifdef USE_MESH_ELEMENT_MAPPING + memcpy(edge_faces, + storage->edge_poly_map[edge].indices, + sizeof(int) * storage->edge_poly_map[edge].count); +#else + const Mesh *mesh = storage->mesh; + const MPoly *mpoly = mesh->mpoly; + const MLoop *mloop = mesh->mloop; + int num = 0; + for (int poly = 0; poly < mesh->totpoly; poly++) { + const MPoly *mp = &mpoly[poly]; + for (int loop = 0; loop < mpoly->totloop; loop++) { + const MLoop *ml = &mloop[mp->loopstart + loop]; + if (ml->e == edge) { + edge_faces[num++] = poly; + break; + } + } + } +#endif +} + +static float get_edge_sharpness(const OpenSubdiv_Converter *converter, int edge) +{ + ConverterStorage *storage = converter->user_data; + const MEdge *medge = storage->mesh->medge; + const float edge_crease = (float)medge[edge].crease / 255.0f; + return edge_crease * storage->settings.level; +} + +static int get_num_vert_edges(const OpenSubdiv_Converter *converter, int vert) +{ + ConverterStorage *storage = converter->user_data; +#ifdef USE_MESH_ELEMENT_MAPPING + return storage->vert_edge_map[vert].count; +#else + const Mesh *mesh = storage->mesh; + const MEdge *medge = mesh->medge; + int num = 0; + for (int edge = 0; edge < mesh->totedge; edge++) { + const MEdge *me = &medge[edge]; + if (me->v1 == vert || me->v2 == vert) { + ++num; + } + } + return num; +#endif +} + +static void get_vert_edges(const OpenSubdiv_Converter *converter, + int vert, + int *vert_edges) +{ + ConverterStorage *storage = converter->user_data; +#ifdef USE_MESH_ELEMENT_MAPPING + memcpy(vert_edges, + storage->vert_edge_map[vert].indices, + sizeof(int) * storage->vert_edge_map[vert].count); +#else + const Mesh *mesh = storage->mesh; + const MEdge *medge = mesh->medge; + int num = 0; + for (int edge = 0; edge < mesh->totedge; edge++) { + const MEdge *me = &medge[edge]; + if (me->v1 == vert || me->v2 == vert) { + vert_edges[num++] = edge; + } + } +#endif +} + +static int get_num_vert_faces(const OpenSubdiv_Converter *converter, int vert) +{ + ConverterStorage *storage = converter->user_data; +#ifdef USE_MESH_ELEMENT_MAPPING + return storage->vert_poly_map[vert].count; +#else + const Mesh *mesh = storage->mesh; + const MPoly *mpoly = mesh->mpoly; + const MLoop *mloop = mesh->mloop; + int num = 0; + for (int poly = 0; poly < mesh->totpoly; poly++) { + const MPoly *mp = &mpoly[poly]; + for (int loop = 0; loop < mpoly->totloop; loop++) { + const MLoop *ml = &mloop[mp->loopstart + loop]; + if (ml->v == vert) { + ++num; + break; + } + } + } + return num; +#endif +} + +static void get_vert_faces(const OpenSubdiv_Converter *converter, + int vert, + int *vert_faces) +{ + ConverterStorage *storage = converter->user_data; +#ifdef USE_MESH_ELEMENT_MAPPING + memcpy(vert_faces, + storage->vert_poly_map[vert].indices, + sizeof(int) * storage->vert_poly_map[vert].count); +#else + const Mesh *mesh = storage->mesh; + const MPoly *mpoly = mesh->mpoly; + const MLoop *mloop = mesh->mloop; + int num = 0; + for (int poly = 0; poly < mesh->totpoly; poly++) { + const MPoly *mp = &mpoly[poly]; + for (int loop = 0; loop < mpoly->totloop; loop++) { + const MLoop *ml = &mloop[mp->loopstart + loop]; + if (ml->v == vert) { + vert_faces[num++] = poly; + break; + } + } + } +#endif +} + +static int get_num_uv_layers(const OpenSubdiv_Converter *converter) +{ + ConverterStorage *storage = converter->user_data; + const Mesh *mesh = storage->mesh; + return CustomData_number_of_layers(&mesh->ldata, CD_MLOOPUV); +} + +static void precalc_uv_layer(const OpenSubdiv_Converter *converter, + const int layer_index) +{ + ConverterStorage *storage = converter->user_data; + const Mesh *mesh = storage->mesh; + const MPoly *mpoly = mesh->mpoly; + const MLoop *mloop = mesh->mloop; + const MLoopUV *mloopuv = CustomData_get_layer_n( + &mesh->ldata, CD_MLOOPUV, layer_index); + const int num_poly = mesh->totpoly; + const int num_vert = mesh->totvert; + const float limit[2] = {STD_UV_CONNECT_LIMIT, STD_UV_CONNECT_LIMIT}; + /* Initialize memory required for the operations. */ + if (storage->loop_uv_indices == NULL) { + storage->loop_uv_indices = MEM_malloc_arrayN( + mesh->totloop, sizeof(int), "loop uv vertex index"); + } + UvVertMap *uv_vert_map = BKE_mesh_uv_vert_map_create( + mpoly, mloop, mloopuv, + num_poly, num_vert, + limit, + false, true); + /* NOTE: First UV vertex is supposed to be always marked as separate. */ + storage->num_uv_coordinates = -1; + for (int vertex_index = 0; vertex_index < num_vert; ++vertex_index) { + const UvMapVert *uv_vert = BKE_mesh_uv_vert_map_get_vert(uv_vert_map, + vertex_index); + while (uv_vert != NULL) { + if (uv_vert->separate) { + storage->num_uv_coordinates++; + } + const MPoly *mp = &mpoly[uv_vert->poly_index]; + const int global_loop_index = mp->loopstart + + uv_vert->loop_of_poly_index; + storage->loop_uv_indices[global_loop_index] = + storage->num_uv_coordinates; + uv_vert = uv_vert->next; + } + } + /* So far this value was used as a 0-based index, actual number of UV + * vertices is 1 more. + */ + storage->num_uv_coordinates += 1; + BKE_mesh_uv_vert_map_free(uv_vert_map); +} + +static void finish_uv_layer(const OpenSubdiv_Converter *UNUSED(converter)) +{ +} + +static int get_num_uvs(const OpenSubdiv_Converter *converter) +{ + ConverterStorage *storage = converter->user_data; + return storage->num_uv_coordinates; +} + +static int get_face_corner_uv_index(const OpenSubdiv_Converter *converter, + const int face_index, + const int corner) +{ + ConverterStorage *storage = converter->user_data; + const MPoly *mp = &storage->mesh->mpoly[face_index]; + return storage->loop_uv_indices[mp->loopstart + corner]; +} + +static void free_user_data(const OpenSubdiv_Converter *converter) +{ + ConverterStorage *user_data = converter->user_data; + MEM_SAFE_FREE(user_data->loop_uv_indices); +#ifdef USE_MESH_ELEMENT_MAPPING + MEM_freeN(user_data->vert_edge_map); + MEM_freeN(user_data->vert_edge_mem); + MEM_freeN(user_data->vert_poly_map); + MEM_freeN(user_data->vert_poly_mem); + MEM_freeN(user_data->edge_poly_map); + MEM_freeN(user_data->edge_poly_mem); +#endif + MEM_freeN(user_data); +} + +static void init_functions(OpenSubdiv_Converter *converter) +{ + converter->getSchemeType = get_scheme_type; + + converter->getFVarLinearInterpolation = get_fvar_linear_interpolation; + + converter->getNumFaces = get_num_faces; + converter->getNumEdges = get_num_edges; + converter->getNumVertices = get_num_verts; + + converter->getNumFaceVertices = get_num_face_verts; + converter->getFaceVertices = get_face_verts; + converter->getFaceEdges = get_face_edges; + + converter->getEdgeVertices = get_edge_verts; + converter->getNumEdgeFaces = get_num_edge_faces; + converter->getEdgeFaces = get_edge_faces; + converter->getEdgeSharpness = get_edge_sharpness; + + converter->getNumVertexEdges = get_num_vert_edges; + converter->getVertexEdges = get_vert_edges; + converter->getNumVertexFaces = get_num_vert_faces; + converter->getVertexFaces = get_vert_faces; + + converter->getNumUVLayers = get_num_uv_layers; + converter->precalcUVLayer = precalc_uv_layer; + converter->finishUVLayer = finish_uv_layer; + converter->getNumUVCoordinates = get_num_uvs; + converter->getFaceCornerUVIndex = get_face_corner_uv_index; + + converter->freeUserData = free_user_data; +} + +static void create_element_maps_if_needed(ConverterStorage *storage) +{ +#ifdef USE_MESH_ELEMENT_MAPPING + const Mesh *mesh = storage->mesh; + BKE_mesh_vert_edge_map_create(&storage->vert_edge_map, + &storage->vert_edge_mem, + mesh->medge, + mesh->totvert, + mesh->totedge); + BKE_mesh_vert_poly_map_create(&storage->vert_poly_map, + &storage->vert_poly_mem, + mesh->mpoly, + mesh->mloop, + mesh->totvert, + mesh->totpoly, + mesh->totloop); + BKE_mesh_edge_poly_map_create(&storage->edge_poly_map, + &storage->edge_poly_mem, + mesh->medge, mesh->totedge, + mesh->mpoly, mesh->totpoly, + mesh->mloop, mesh->totloop); +#else + (void) storage; /* Ignored. */ +#endif +} + +static void init_user_data(OpenSubdiv_Converter *converter, + const SubdivSettings *settings, + const Mesh *mesh) +{ + ConverterStorage *user_data = + MEM_mallocN(sizeof(ConverterStorage), __func__); + user_data->settings = *settings; + user_data->mesh = mesh; + user_data->loop_uv_indices = NULL; + create_element_maps_if_needed(user_data); + converter->user_data = user_data; +} +#endif + +void BKE_subdiv_converter_init_for_mesh(struct OpenSubdiv_Converter *converter, + const SubdivSettings *settings, + const Mesh *mesh) +{ +#ifdef WITH_OPENSUBDIV + init_functions(converter); + init_user_data(converter, settings, mesh); +#else + UNUSED_VARS(converter, settings, mesh); +#endif +} |