237 lines
7.1 KiB
C
237 lines
7.1 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#pragma once
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/** \file
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* \ingroup bke
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*/
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/* Axis-aligned bounding box */
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typedef struct {
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float bmin[3], bmax[3];
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} BB;
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/* Axis-aligned bounding box with centroid */
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typedef struct {
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float bmin[3], bmax[3], bcentroid[3];
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} BBC;
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/* NOTE: this structure is getting large, might want to split it into
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* union'd structs */
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struct PBVHNode {
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/* Opaque handle for drawing code */
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struct GPU_PBVH_Buffers *draw_buffers;
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/* Voxel bounds */
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BB vb;
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BB orig_vb;
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/* For internal nodes, the offset of the children in the PBVH
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* 'nodes' array. */
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int children_offset;
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/* Pointer into the PBVH prim_indices array and the number of
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* primitives used by this leaf node.
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*
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* Used for leaf nodes in both mesh- and multires-based PBVHs.
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*/
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int *prim_indices;
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unsigned int totprim;
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/* Array of indices into the mesh's MVert array. Contains the
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* indices of all vertices used by faces that are within this
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* node's bounding box.
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*
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* Note that a vertex might be used by a multiple faces, and
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* these faces might be in different leaf nodes. Such a vertex
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* will appear in the vert_indices array of each of those leaf
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* nodes.
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*
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* In order to support cases where you want access to multiple
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* nodes' vertices without duplication, the vert_indices array
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* is ordered such that the first part of the array, up to
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* index 'uniq_verts', contains "unique" vertex indices. These
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* vertices might not be truly unique to this node, but if
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* they appear in another node's vert_indices array, they will
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* be above that node's 'uniq_verts' value.
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*
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* Used for leaf nodes in a mesh-based PBVH (not multires.)
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*/
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const int *vert_indices;
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unsigned int uniq_verts, face_verts;
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/* An array mapping face corners into the vert_indices
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* array. The array is sized to match 'totprim', and each of
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* the face's corners gets an index into the vert_indices
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* array, in the same order as the corners in the original
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* MLoopTri.
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*
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* Used for leaf nodes in a mesh-based PBVH (not multires.)
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*/
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const int (*face_vert_indices)[3];
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/* Indicates whether this node is a leaf or not; also used for
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* marking various updates that need to be applied. */
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PBVHNodeFlags flag : 16;
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/* Used for raycasting: how close bb is to the ray point. */
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float tmin;
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/* Scalar displacements for sculpt mode's layer brush. */
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float *layer_disp;
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int proxy_count;
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PBVHProxyNode *proxies;
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/* Dyntopo */
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GSet *bm_faces;
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GSet *bm_unique_verts;
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GSet *bm_other_verts;
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float (*bm_orco)[3];
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int (*bm_ortri)[3];
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int bm_tot_ortri;
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/* Used to store the brush color during a stroke and composite it over the original color */
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PBVHColorBufferNode color_buffer;
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};
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typedef enum {
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PBVH_DYNTOPO_SMOOTH_SHADING = 1,
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} PBVHFlags;
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typedef struct PBVHBMeshLog PBVHBMeshLog;
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struct PBVH {
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PBVHType type;
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PBVHFlags flags;
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PBVHNode *nodes;
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int node_mem_count, totnode;
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int *prim_indices;
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int totprim;
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int totvert;
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int leaf_limit;
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/* Mesh data */
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const struct Mesh *mesh;
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MVert *verts;
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const MPoly *mpoly;
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const MLoop *mloop;
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const MLoopTri *looptri;
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CustomData *vdata;
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CustomData *ldata;
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CustomData *pdata;
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int face_sets_color_seed;
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int face_sets_color_default;
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int *face_sets;
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/* Grid Data */
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CCGKey gridkey;
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CCGElem **grids;
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void **gridfaces;
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const DMFlagMat *grid_flag_mats;
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int totgrid;
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BLI_bitmap **grid_hidden;
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/* Only used during BVH build and update,
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* don't need to remain valid after */
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BLI_bitmap *vert_bitmap;
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#ifdef PERFCNTRS
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int perf_modified;
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#endif
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/* flag are verts/faces deformed */
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bool deformed;
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bool show_mask;
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bool show_face_sets;
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bool respect_hide;
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/* Dynamic topology */
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BMesh *bm;
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float bm_max_edge_len;
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float bm_min_edge_len;
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int cd_vert_node_offset;
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int cd_face_node_offset;
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float planes[6][4];
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int num_planes;
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struct BMLog *bm_log;
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struct SubdivCCG *subdiv_ccg;
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};
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/* pbvh.c */
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void BB_reset(BB *bb);
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void BB_expand(BB *bb, const float co[3]);
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void BB_expand_with_bb(BB *bb, BB *bb2);
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void BBC_update_centroid(BBC *bbc);
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int BB_widest_axis(const BB *bb);
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void pbvh_grow_nodes(PBVH *bvh, int totnode);
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bool ray_face_intersection_quad(const float ray_start[3],
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struct IsectRayPrecalc *isect_precalc,
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const float t0[3],
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const float t1[3],
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const float t2[3],
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const float t3[3],
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float *depth);
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bool ray_face_intersection_tri(const float ray_start[3],
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struct IsectRayPrecalc *isect_precalc,
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const float t0[3],
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const float t1[3],
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const float t2[3],
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float *depth);
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bool ray_face_nearest_quad(const float ray_start[3],
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const float ray_normal[3],
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const float t0[3],
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const float t1[3],
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const float t2[3],
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const float t3[3],
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float *r_depth,
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float *r_dist_sq);
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bool ray_face_nearest_tri(const float ray_start[3],
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const float ray_normal[3],
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const float t0[3],
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const float t1[3],
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const float t2[3],
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float *r_depth,
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float *r_dist_sq);
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void pbvh_update_BB_redraw(PBVH *bvh, PBVHNode **nodes, int totnode, int flag);
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/* pbvh_bmesh.c */
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bool pbvh_bmesh_node_raycast(PBVHNode *node,
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const float ray_start[3],
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const float ray_normal[3],
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struct IsectRayPrecalc *isect_precalc,
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float *dist,
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bool use_original,
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int *r_active_vertex_index,
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float *r_face_normal);
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bool pbvh_bmesh_node_nearest_to_ray(PBVHNode *node,
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const float ray_start[3],
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const float ray_normal[3],
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float *depth,
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float *dist_sq,
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bool use_original);
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void pbvh_bmesh_normals_update(PBVHNode **nodes, int totnode);
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