diff options
author | Sergey Sharybin <sergey.vfx@gmail.com> | 2020-06-22 18:15:20 +0300 |
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committer | Sergey Sharybin <sergey.vfx@gmail.com> | 2020-06-22 18:22:53 +0300 |
commit | b175bb2503bd1c93464349c9c2a583b642de6d5f (patch) | |
tree | 16bc80cc66dca4400e822bd22aa19012782de4f2 /source/blender/blenkernel/intern/subdiv_ccg.c | |
parent | 41158a91f2edcc8f7b29e5a0b37ef7a951908c3c (diff) |
Subdiv CCG: Add access to first grid index of a face
Is lazily-initialized array owned by the SubdivCCG. Allows to access
index of a first grid of a given face in the flat array of grids.
Currently unused, but is needed for multires bake.
Diffstat (limited to 'source/blender/blenkernel/intern/subdiv_ccg.c')
-rw-r--r-- | source/blender/blenkernel/intern/subdiv_ccg.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/source/blender/blenkernel/intern/subdiv_ccg.c b/source/blender/blenkernel/intern/subdiv_ccg.c index 4d12ea1d54f..a1e218390c3 100644 --- a/source/blender/blenkernel/intern/subdiv_ccg.c +++ b/source/blender/blenkernel/intern/subdiv_ccg.c @@ -655,6 +655,7 @@ void BKE_subdiv_ccg_destroy(SubdivCCG *subdiv_ccg) MEM_SAFE_FREE(adjacent_vertex->corner_coords); } MEM_SAFE_FREE(subdiv_ccg->adjacent_vertices); + MEM_SAFE_FREE(subdiv_ccg->cache_.start_face_grid_index); MEM_freeN(subdiv_ccg); } @@ -1802,4 +1803,35 @@ int BKE_subdiv_ccg_grid_to_face_index(const SubdivCCG *subdiv_ccg, const int gri return face_index; } +const int *BKE_subdiv_ccg_start_face_grid_index_ensure(SubdivCCG *subdiv_ccg) +{ + if (subdiv_ccg->cache_.start_face_grid_index == NULL) { + const Subdiv *subdiv = subdiv_ccg->subdiv; + OpenSubdiv_TopologyRefiner *topology_refiner = subdiv->topology_refiner; + if (topology_refiner == NULL) { + return NULL; + } + + const int num_coarse_faces = topology_refiner->getNumFaces(topology_refiner); + + subdiv_ccg->cache_.start_face_grid_index = MEM_malloc_arrayN( + sizeof(int), num_coarse_faces, "start_face_grid_index"); + + int start_grid_index = 0; + for (int face_index = 0; face_index < num_coarse_faces; face_index++) { + const int num_face_grids = topology_refiner->getNumFaceVertices(topology_refiner, + face_index); + subdiv_ccg->cache_.start_face_grid_index[face_index] = start_grid_index; + start_grid_index += num_face_grids; + } + } + + return subdiv_ccg->cache_.start_face_grid_index; +} + +const int *BKE_subdiv_ccg_start_face_grid_index_get(const SubdivCCG *subdiv_ccg) +{ + return subdiv_ccg->cache_.start_face_grid_index; +} + /** \} */ |