diff options
Diffstat (limited to 'source/blender/editors/physics/particle_edit.c')
| -rw-r--r-- | source/blender/editors/physics/particle_edit.c | 216 |
1 files changed, 206 insertions, 10 deletions
diff --git a/source/blender/editors/physics/particle_edit.c b/source/blender/editors/physics/particle_edit.c index 9a3433b0ccf..6c90e319bc6 100644 --- a/source/blender/editors/physics/particle_edit.c +++ b/source/blender/editors/physics/particle_edit.c @@ -61,7 +61,7 @@ #include "BKE_modifier.h" #include "BKE_particle.h" #include "BKE_report.h" - +#include "BKE_bvhutils.h" #include "BKE_pointcache.h" #include "BIF_gl.h" @@ -83,9 +83,11 @@ #include "physics_intern.h" -static void PE_create_particle_edit(Scene *scene, Object *ob, PointCache *cache, ParticleSystem *psys); -static void PTCacheUndo_clear(PTCacheEdit *edit); -static void recalc_emitter_field(Object *ob, ParticleSystem *psys); +void PE_create_particle_edit(Scene *scene, Object *ob, PointCache *cache, ParticleSystem *psys); +void PTCacheUndo_clear(PTCacheEdit *edit); +void recalc_lengths(PTCacheEdit *edit); +void recalc_emitter_field(Object *ob, ParticleSystem *psys); +void update_world_cos(Object *ob, PTCacheEdit *edit); #define KEY_K PTCacheEditKey *key; int k #define POINT_P PTCacheEditPoint *point; int p @@ -355,6 +357,7 @@ typedef struct PEData { Object *ob; DerivedMesh *dm; PTCacheEdit *edit; + BVHTreeFromMesh shape_bvh; const int *mval; rcti *rect; @@ -411,6 +414,25 @@ static void PE_set_view3d_data(bContext *C, PEData *data) } } +static void PE_create_shape_tree(PEData *data, Object *shapeob) +{ + DerivedMesh *dm = shapeob->derivedFinal; + + memset(&data->shape_bvh, 0, sizeof(data->shape_bvh)); + + if (!dm) { + return; + } + + DM_ensure_tessface(dm); + bvhtree_from_mesh_faces(&data->shape_bvh, dm, 0.0f, 4, 8); +} + +static void PE_free_shape_tree(PEData *data) +{ + free_bvhtree_from_mesh(&data->shape_bvh); +} + /*************************** selection utilities *******************************/ static bool key_test_depth(PEData *data, const float co[3], const int screen_co[2]) @@ -1055,7 +1077,7 @@ static void pe_iterate_lengths(Scene *scene, PTCacheEdit *edit) } } /* set current distances to be kept between neighbouting keys */ -static void recalc_lengths(PTCacheEdit *edit) +void recalc_lengths(PTCacheEdit *edit) { POINT_P; KEY_K; @@ -1071,7 +1093,7 @@ static void recalc_lengths(PTCacheEdit *edit) } /* calculate a tree for finding nearest emitter's vertice */ -static void recalc_emitter_field(Object *ob, ParticleSystem *psys) +void recalc_emitter_field(Object *ob, ParticleSystem *psys) { DerivedMesh *dm=psys_get_modifier(ob, psys)->dm; PTCacheEdit *edit= psys->edit; @@ -1159,7 +1181,7 @@ static void PE_update_selection(Scene *scene, Object *ob, int useflag) point->flag &= ~PEP_EDIT_RECALC; } -static void update_world_cos(Object *ob, PTCacheEdit *edit) +void update_world_cos(Object *ob, PTCacheEdit *edit) { ParticleSystem *psys = edit->psys; ParticleSystemModifierData *psmd= psys_get_modifier(ob, psys); @@ -3229,7 +3251,7 @@ static void brush_puff(PEData *data, int point_index) static void BKE_brush_weight_get(PEData *data, float UNUSED(mat[4][4]), float UNUSED(imat[4][4]), int point_index, int key_index, PTCacheEditKey *UNUSED(key)) { - /* roots have full weight allways */ + /* roots have full weight always */ if (key_index) { PTCacheEdit *edit = data->edit; ParticleSystem *psys = edit->psys; @@ -4032,6 +4054,180 @@ void PARTICLE_OT_brush_edit(wmOperatorType *ot) RNA_def_collection_runtime(ot->srna, "stroke", &RNA_OperatorStrokeElement, "Stroke", ""); } +/*********************** cut shape ***************************/ + +static int shape_cut_poll(bContext *C) +{ + if (PE_hair_poll(C)) { + Scene *scene= CTX_data_scene(C); + ParticleEditSettings *pset= PE_settings(scene); + + if (pset->shape_object) + return true; + } + + return false; +} + +typedef struct PointInsideBVH { + BVHTreeFromMesh bvhdata; + int num_hits; +} PointInsideBVH; + +static void point_inside_bvh_cb(void *userdata, int index, const BVHTreeRay *ray, BVHTreeRayHit *hit) +{ + PointInsideBVH *data = userdata; + + data->bvhdata.raycast_callback(&data->bvhdata, index, ray, hit); + + if (hit->index != -1) + ++data->num_hits; +} + +/* true if the point is inside the shape mesh */ +static bool shape_cut_test_point(PEData *data, ParticleCacheKey *key) +{ + BVHTreeFromMesh *shape_bvh = &data->shape_bvh; + const float dir[3] = {1.0f, 0.0f, 0.0f}; + PointInsideBVH userdata; + + userdata.bvhdata = data->shape_bvh; + userdata.num_hits = 0; + + BLI_bvhtree_ray_cast_all(shape_bvh->tree, key->co, dir, 0.0f, point_inside_bvh_cb, &userdata); + + /* for any point inside a watertight mesh the number of hits is uneven */ + return (userdata.num_hits % 2) == 1; +} + +static void shape_cut(PEData *data, int pa_index) +{ + PTCacheEdit *edit = data->edit; + Object *ob = data->ob; + ParticleEditSettings *pset = PE_settings(data->scene); + ParticleCacheKey *key; + + bool cut; + float cut_time = 1.0; + int k, totkeys = 1 << pset->draw_step; + + /* don't cut hidden */ + if (edit->points[pa_index].flag & PEP_HIDE) + return; + + cut = false; + + /* check if root is inside the cut shape */ + key = edit->pathcache[pa_index]; + if (!shape_cut_test_point(data, key)) { + cut_time = -1.0f; + cut = true; + } + else { + for (k = 0; k < totkeys; k++, key++) { + BVHTreeRayHit hit; + float dir[3]; + float len; + + sub_v3_v3v3(dir, (key+1)->co, key->co); + len = normalize_v3(dir); + + memset(&hit, 0, sizeof(hit)); + hit.index = -1; + hit.dist = len; + BLI_bvhtree_ray_cast(data->shape_bvh.tree, key->co, dir, 0.0f, &hit, data->shape_bvh.raycast_callback, &data->shape_bvh); + if (hit.index >= 0) { + if (hit.dist < len) { + cut_time = (hit.dist / len + (float)k) / (float)totkeys; + cut = true; + break; + } + } + } + } + + if (cut) { + if (cut_time < 0.0f) { + edit->points[pa_index].flag |= PEP_TAG; + } + else { + rekey_particle_to_time(data->scene, ob, pa_index, cut_time); + edit->points[pa_index].flag |= PEP_EDIT_RECALC; + } + } +} + +static int shape_cut_exec(bContext *C, wmOperator *UNUSED(op)) +{ + Scene *scene = CTX_data_scene(C); + Object *ob = CTX_data_active_object(C); + ParticleEditSettings *pset = PE_settings(scene); + PTCacheEdit *edit = PE_get_current(scene, ob); + Object *shapeob = pset->shape_object; + int selected = count_selected_keys(scene, edit); + int lock_root = pset->flag & PE_LOCK_FIRST; + + if (!PE_start_edit(edit)) + return OPERATOR_CANCELLED; + + /* disable locking temporatily for disconnected hair */ + if (edit->psys && edit->psys->flag & PSYS_GLOBAL_HAIR) + pset->flag &= ~PE_LOCK_FIRST; + + if (edit->psys && edit->pathcache) { + PEData data; + int removed; + + PE_set_data(C, &data); + PE_create_shape_tree(&data, shapeob); + + if (selected) + foreach_selected_point(&data, shape_cut); + else + foreach_point(&data, shape_cut); + + removed = remove_tagged_particles(ob, edit->psys, pe_x_mirror(ob)); + recalc_lengths(edit); + + if (removed) { + update_world_cos(ob, edit); + psys_free_path_cache(NULL, edit); + DAG_id_tag_update(&ob->id, OB_RECALC_DATA); + } + else + PE_update_object(scene, ob, 1); + + if (edit->psys) { + WM_event_add_notifier(C, NC_OBJECT|ND_PARTICLE|NA_EDITED, ob); + } + else { + DAG_id_tag_update(&ob->id, OB_RECALC_DATA); + WM_event_add_notifier(C, NC_OBJECT|ND_MODIFIER, ob); + } + + PE_free_shape_tree(&data); + } + + pset->flag |= lock_root; + + return OPERATOR_FINISHED; +} + +void PARTICLE_OT_shape_cut(wmOperatorType *ot) +{ + /* identifiers */ + ot->name = "Shape Cut"; + ot->idname = "PARTICLE_OT_shape_cut"; + ot->description = "Cut hair to conform to the set shape object"; + + /* api callbacks */ + ot->exec = shape_cut_exec; + ot->poll = shape_cut_poll; + + /* flags */ + ot->flag = OPTYPE_REGISTER|OPTYPE_UNDO; +} + /*********************** undo ***************************/ static void free_PTCacheUndo(PTCacheUndo *undo) @@ -4259,7 +4455,7 @@ int PE_undo_valid(Scene *scene) return 0; } -static void PTCacheUndo_clear(PTCacheEdit *edit) +void PTCacheUndo_clear(PTCacheEdit *edit) { PTCacheUndo *undo; @@ -4360,7 +4556,7 @@ int PE_minmax(Scene *scene, float min[3], float max[3]) /************************ particle edit toggle operator ************************/ /* initialize needed data for bake edit */ -static void PE_create_particle_edit(Scene *scene, Object *ob, PointCache *cache, ParticleSystem *psys) +void PE_create_particle_edit(Scene *scene, Object *ob, PointCache *cache, ParticleSystem *psys) { PTCacheEdit *edit; ParticleSystemModifierData *psmd = (psys) ? psys_get_modifier(ob, psys) : NULL; 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