diff options
Diffstat (limited to 'source/blender/blenkernel/intern/subdiv_ccg.c')
| -rw-r--r-- | source/blender/blenkernel/intern/subdiv_ccg.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/source/blender/blenkernel/intern/subdiv_ccg.c b/source/blender/blenkernel/intern/subdiv_ccg.c index a1e218390c3..22649a2af07 100644 --- a/source/blender/blenkernel/intern/subdiv_ccg.c +++ b/source/blender/blenkernel/intern/subdiv_ccg.c @@ -1834,4 +1834,59 @@ const int *BKE_subdiv_ccg_start_face_grid_index_get(const SubdivCCG *subdiv_ccg) return subdiv_ccg->cache_.start_face_grid_index; } +static void adjacet_vertices_index_from_adjacent_edge(const SubdivCCG *subdiv_ccg, + const SubdivCCGCoord *coord, + const MLoop *mloop, + const MPoly *mpoly, + int *r_v1, + int *r_v2) +{ + const int grid_size_1 = subdiv_ccg->grid_size - 1; + const int poly_index = BKE_subdiv_ccg_grid_to_face_index(subdiv_ccg, coord->grid_index); + const MPoly *p = &mpoly[poly_index]; + *r_v1 = mloop[coord->grid_index].v; + if (coord->x == grid_size_1) { + const MLoop *next = ME_POLY_LOOP_NEXT(mloop, p, coord->grid_index); + *r_v2 = next->v; + } + if (coord->y == grid_size_1) { + const MLoop *prev = ME_POLY_LOOP_PREV(mloop, p, coord->grid_index); + *r_v2 = prev->v; + } +} + +SubdivCCGAdjacencyType BKE_subdiv_ccg_coarse_mesh_adjacency_info_get(const SubdivCCG *subdiv_ccg, + const SubdivCCGCoord *coord, + const MLoop *mloop, + const MPoly *mpoly, + int *r_v1, + int *r_v2) +{ + + const int grid_size_1 = subdiv_ccg->grid_size - 1; + if (is_corner_grid_coord(subdiv_ccg, coord)) { + if (coord->x == 0 && coord->y == 0) { + /* Grid corner in the center of a poly. */ + return SUBDIV_CCG_ADJACENT_NONE; + } + if (coord->x == grid_size_1 && coord->y == grid_size_1) { + /* Grid corner adjacent to a coarse mesh vertex. */ + *r_v1 = *r_v2 = mloop[coord->grid_index].v; + return SUBDIV_CCG_ADJACENT_VERTEX; + } + /* Grid corner adjacent to the middle of a coarse mesh edge. */ + adjacet_vertices_index_from_adjacent_edge(subdiv_ccg, coord, mloop, mpoly, r_v1, r_v2); + return SUBDIV_CCG_ADJACENT_EDGE; + } + + if (is_boundary_grid_coord(subdiv_ccg, coord)) { + if (!is_inner_edge_grid_coordinate(subdiv_ccg, coord)) { + /* Grid boundary adjacent to a coarse mesh edge. */ + adjacet_vertices_index_from_adjacent_edge(subdiv_ccg, coord, mloop, mpoly, r_v1, r_v2); + return SUBDIV_CCG_ADJACENT_EDGE; + } + } + return SUBDIV_CCG_ADJACENT_NONE; +} + /** \} */ |