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/*
* ***** 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.
*
* ***** END GPL LICENSE BLOCK *****
*/
#ifndef __BKE_MESH_SAMPLE_H__
#define __BKE_MESH_SAMPLE_H__
/** \file BKE_mesh_sample.h
* \ingroup bke
*/
struct DerivedMesh;
struct Key;
struct KeyBlock;
struct MFace;
struct MVert;
struct MeshSample;
struct MeshSampleGenerator;
typedef struct MeshSampleGenerator MeshSampleGenerator;
typedef float (*MeshSampleVertexWeightFp)(struct DerivedMesh *dm, struct MVert *vert, unsigned int index, void *userdata);
typedef bool (*MeshSampleRayFp)(void *userdata, float ray_start[3], float ray_end[3]);
/* ==== Evaluate ==== */
bool BKE_mesh_sample_is_volume_sample(const struct MeshSample *sample);
bool BKE_mesh_sample_eval(struct DerivedMesh *dm, const struct MeshSample *sample, float loc[3], float nor[3], float tang[3]);
bool BKE_mesh_sample_shapekey(struct Key *key, struct KeyBlock *kb, const struct MeshSample *sample, float loc[3]);
void BKE_mesh_sample_clear(struct MeshSample *sample);
/* ==== Sampling ==== */
struct MeshSampleGenerator *BKE_mesh_sample_gen_surface_vertices(struct DerivedMesh *dm);
/* face_weights is optional */
struct MeshSampleGenerator *BKE_mesh_sample_gen_surface_random(struct DerivedMesh *dm, unsigned int seed);
struct MeshSampleGenerator *BKE_mesh_sample_gen_surface_random_ex(struct DerivedMesh *dm, unsigned int seed,
MeshSampleVertexWeightFp vertex_weight_cb, void *userdata, bool use_facearea);
struct MeshSampleGenerator *BKE_mesh_sample_gen_surface_raycast(struct DerivedMesh *dm, MeshSampleRayFp ray_cb, void *userdata);
struct MeshSampleGenerator *BKE_mesh_sample_gen_volume_random_bbray(struct DerivedMesh *dm, unsigned int seed, float density);
void BKE_mesh_sample_free_generator(struct MeshSampleGenerator *gen);
bool BKE_mesh_sample_generate(struct MeshSampleGenerator *gen, struct MeshSample *sample);
/* ==== Utilities ==== */
struct ParticleSystem;
struct ParticleData;
struct BVHTreeFromMesh;
bool BKE_mesh_sample_from_particle(struct MeshSample *sample, struct ParticleSystem *psys, struct DerivedMesh *dm, struct ParticleData *pa);
bool BKE_mesh_sample_to_particle(struct MeshSample *sample, struct ParticleSystem *psys, struct DerivedMesh *dm, struct BVHTreeFromMesh *bvhtree, struct ParticleData *pa);
#endif /* __BKE_MESH_SAMPLE_H__ */
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