249 lines
8.7 KiB
C++
249 lines
8.7 KiB
C++
/* SPDX-FileCopyrightText: 2006 NaN Holding BV. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
#pragma once
|
|
|
|
/** \file
|
|
* \ingroup bke
|
|
*
|
|
* This header encapsulates necessary code to build a BVH.
|
|
*/
|
|
|
|
#include <mutex>
|
|
|
|
#include "BLI_bit_vector.hh"
|
|
#include "BLI_kdopbvh.h"
|
|
#include "BLI_threads.h"
|
|
|
|
struct BMEditMesh;
|
|
struct BVHCache;
|
|
struct BVHTree;
|
|
struct MFace;
|
|
struct Mesh;
|
|
struct MLoopTri;
|
|
struct PointCloud;
|
|
struct vec2i;
|
|
|
|
/**
|
|
* Struct that stores basic information about a BVHTree built from a edit-mesh.
|
|
*/
|
|
struct BVHTreeFromEditMesh {
|
|
BVHTree *tree;
|
|
|
|
/** Default callbacks to BVH nearest and ray-cast. */
|
|
BVHTree_NearestPointCallback nearest_callback;
|
|
BVHTree_RayCastCallback raycast_callback;
|
|
|
|
/* Private data */
|
|
bool cached;
|
|
};
|
|
|
|
/**
|
|
* Struct that stores basic information about a #BVHTree built from a mesh.
|
|
*/
|
|
struct BVHTreeFromMesh {
|
|
BVHTree *tree;
|
|
|
|
/** Default callbacks to BVH nearest and ray-cast. */
|
|
BVHTree_NearestPointCallback nearest_callback;
|
|
BVHTree_RayCastCallback raycast_callback;
|
|
|
|
/* Vertex array, so that callbacks have instant access to data. */
|
|
const float (*vert_positions)[3];
|
|
const vec2i *edge;
|
|
const MFace *face;
|
|
const int *corner_verts;
|
|
const MLoopTri *looptri;
|
|
|
|
/* Private data */
|
|
bool cached;
|
|
};
|
|
|
|
enum BVHCacheType {
|
|
BVHTREE_FROM_VERTS,
|
|
BVHTREE_FROM_EDGES,
|
|
BVHTREE_FROM_FACES,
|
|
BVHTREE_FROM_LOOPTRI,
|
|
BVHTREE_FROM_LOOPTRI_NO_HIDDEN,
|
|
|
|
BVHTREE_FROM_LOOSEVERTS,
|
|
BVHTREE_FROM_LOOSEEDGES,
|
|
|
|
BVHTREE_FROM_EM_LOOSEVERTS,
|
|
BVHTREE_FROM_EM_EDGES,
|
|
BVHTREE_FROM_EM_LOOPTRI,
|
|
|
|
/* Keep `BVHTREE_MAX_ITEM` as last item. */
|
|
BVHTREE_MAX_ITEM,
|
|
};
|
|
|
|
/**
|
|
* Builds a BVH tree where nodes are the relevant elements of the given mesh.
|
|
* Configures #BVHTreeFromMesh.
|
|
*
|
|
* The tree is build in mesh space coordinates, this means special care must be made on queries
|
|
* so that the coordinates and rays are first translated on the mesh local coordinates.
|
|
* Reason for this is that bvh_from_mesh_* can use a cache in some cases and so it
|
|
* becomes possible to reuse a #BVHTree.
|
|
*
|
|
* #free_bvhtree_from_mesh should be called when the tree is no longer needed.
|
|
*/
|
|
BVHTree *bvhtree_from_editmesh_verts(
|
|
BVHTreeFromEditMesh *data, BMEditMesh *em, float epsilon, int tree_type, int axis);
|
|
|
|
/**
|
|
* Builds a BVH-tree where nodes are the vertices of the given `em`.
|
|
*/
|
|
BVHTree *bvhtree_from_editmesh_verts_ex(BVHTreeFromEditMesh *data,
|
|
BMEditMesh *em,
|
|
blender::BitSpan mask,
|
|
int verts_num_active,
|
|
float epsilon,
|
|
int tree_type,
|
|
int axis);
|
|
|
|
/**
|
|
* Builds a BVH-tree where nodes are the given vertices (NOTE: does not copy given `vert`!).
|
|
* \param vert_allocated: if true, vert freeing will be done when freeing data.
|
|
* \param verts_mask: if not null, true elements give which vert to add to BVH-tree.
|
|
* \param verts_num_active: if >= 0, number of active verts to add to BVH-tree
|
|
* (else will be computed from mask).
|
|
*/
|
|
BVHTree *bvhtree_from_mesh_verts_ex(BVHTreeFromMesh *data,
|
|
const float (*vert_positions)[3],
|
|
int verts_num,
|
|
blender::BitSpan verts_mask,
|
|
int verts_num_active,
|
|
float epsilon,
|
|
int tree_type,
|
|
int axis);
|
|
|
|
BVHTree *bvhtree_from_editmesh_edges(
|
|
BVHTreeFromEditMesh *data, BMEditMesh *em, float epsilon, int tree_type, int axis);
|
|
|
|
/**
|
|
* Builds a BVH-tree where nodes are the edges of the given `em`.
|
|
*/
|
|
BVHTree *bvhtree_from_editmesh_edges_ex(BVHTreeFromEditMesh *data,
|
|
BMEditMesh *em,
|
|
blender::BitSpan edges_mask,
|
|
int edges_num_active,
|
|
float epsilon,
|
|
int tree_type,
|
|
int axis);
|
|
|
|
/**
|
|
* Builds a BVH-tree where nodes are the given edges.
|
|
* \param vert, vert_allocated: if true, elem freeing will be done when freeing data.
|
|
* \param edge, edge_allocated: if true, elem freeing will be done when freeing data.
|
|
* \param edges_mask: if not null, true elements give which vert to add to BVH-tree.
|
|
* \param edges_num_active: if >= 0, number of active edges to add to BVH-tree
|
|
* (else will be computed from mask).
|
|
*/
|
|
BVHTree *bvhtree_from_mesh_edges_ex(BVHTreeFromMesh *data,
|
|
const float (*vert_positions)[3],
|
|
const blender::int2 *edge,
|
|
int edges_num,
|
|
blender::BitSpan edges_mask,
|
|
int edges_num_active,
|
|
float epsilon,
|
|
int tree_type,
|
|
int axis);
|
|
|
|
BVHTree *bvhtree_from_editmesh_looptri(
|
|
BVHTreeFromEditMesh *data, BMEditMesh *em, float epsilon, int tree_type, int axis);
|
|
|
|
/**
|
|
* Builds a BVH-tree where nodes are the `looptri` faces of the given `bm`.
|
|
*/
|
|
BVHTree *bvhtree_from_editmesh_looptri_ex(BVHTreeFromEditMesh *data,
|
|
BMEditMesh *em,
|
|
blender::BitSpan mask,
|
|
int looptri_num_active,
|
|
float epsilon,
|
|
int tree_type,
|
|
int axis);
|
|
|
|
/**
|
|
* Builds a BVH-tree where nodes are the looptri faces of the given mesh.
|
|
*/
|
|
BVHTree *bvhtree_from_mesh_looptri_ex(BVHTreeFromMesh *data,
|
|
const float (*vert_positions)[3],
|
|
const int *corner_verts,
|
|
const MLoopTri *looptri,
|
|
int looptri_num,
|
|
blender::BitSpan mask,
|
|
int looptri_num_active,
|
|
float epsilon,
|
|
int tree_type,
|
|
int axis);
|
|
|
|
/**
|
|
* Builds or queries a BVH-cache for the cache BVH-tree of the request type.
|
|
*
|
|
* \note This function only fills a cache, and therefore the mesh argument can
|
|
* be considered logically const. Concurrent access is protected by a mutex.
|
|
*/
|
|
BVHTree *BKE_bvhtree_from_mesh_get(BVHTreeFromMesh *data,
|
|
const Mesh *mesh,
|
|
BVHCacheType bvh_cache_type,
|
|
int tree_type);
|
|
|
|
/**
|
|
* Builds or queries a BVH-cache for the cache BVH-tree of the request type.
|
|
*/
|
|
BVHTree *BKE_bvhtree_from_editmesh_get(BVHTreeFromEditMesh *data,
|
|
BMEditMesh *em,
|
|
int tree_type,
|
|
BVHCacheType bvh_cache_type,
|
|
BVHCache **bvh_cache_p,
|
|
std::mutex *mesh_eval_mutex);
|
|
|
|
/**
|
|
* Frees data allocated by a call to `bvhtree_from_editmesh_*`.
|
|
*/
|
|
void free_bvhtree_from_editmesh(BVHTreeFromEditMesh *data);
|
|
/**
|
|
* Frees data allocated by a call to `bvhtree_from_mesh_*`.
|
|
*/
|
|
void free_bvhtree_from_mesh(BVHTreeFromMesh *data);
|
|
|
|
/**
|
|
* Math functions used by callbacks
|
|
*/
|
|
float bvhtree_ray_tri_intersection(
|
|
const BVHTreeRay *ray, float m_dist, const float v0[3], const float v1[3], const float v2[3]);
|
|
float bvhtree_sphereray_tri_intersection(const BVHTreeRay *ray,
|
|
float radius,
|
|
float m_dist,
|
|
const float v0[3],
|
|
const float v1[3],
|
|
const float v2[3]);
|
|
|
|
struct BVHTreeFromPointCloud {
|
|
BVHTree *tree;
|
|
|
|
BVHTree_NearestPointCallback nearest_callback;
|
|
|
|
const float (*coords)[3];
|
|
};
|
|
|
|
[[nodiscard]] BVHTree *BKE_bvhtree_from_pointcloud_get(BVHTreeFromPointCloud *data,
|
|
const PointCloud *pointcloud,
|
|
int tree_type);
|
|
|
|
void free_bvhtree_from_pointcloud(BVHTreeFromPointCloud *data);
|
|
|
|
/**
|
|
* BVHCache
|
|
*/
|
|
|
|
/* Using local coordinates */
|
|
|
|
bool bvhcache_has_tree(const BVHCache *bvh_cache, const BVHTree *tree);
|
|
BVHCache *bvhcache_init();
|
|
/**
|
|
* Frees a BVH-cache.
|
|
*/
|
|
void bvhcache_free(BVHCache *bvh_cache);
|