diff options
Diffstat (limited to 'source/blender/blenkernel/intern/collision.c')
| -rw-r--r-- | source/blender/blenkernel/intern/collision.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/source/blender/blenkernel/intern/collision.c b/source/blender/blenkernel/intern/collision.c index 2c0939359e0..427b76ab778 100644 --- a/source/blender/blenkernel/intern/collision.c +++ b/source/blender/blenkernel/intern/collision.c @@ -1364,3 +1364,135 @@ int cloth_points_objcollision(Object *ob, ClothModifierData *clmd, float step, f return 1|MIN2 ( ret, 1 ); } + +void cloth_find_point_contacts(Object *ob, ClothModifierData *clmd, float step, float dt, + ColliderContacts **r_collider_contacts, int *r_totcolliders) +{ + Cloth *cloth= clmd->clothObject; + BVHTree *cloth_bvh; + unsigned int i=0, numverts = 0; + ClothVertex *verts = NULL; + + ColliderContacts *collider_contacts; + + Object **collobjs = NULL; + unsigned int numcollobj = 0; + + verts = cloth->verts; + numverts = cloth->numverts; + + //////////////////////////////////////////////////////////// + // static collisions + //////////////////////////////////////////////////////////// + + // create temporary cloth points bvh + cloth_bvh = BLI_bvhtree_new(numverts, MAX2(clmd->coll_parms->epsilon, clmd->coll_parms->distance_repel), 4, 6); + /* fill tree */ + for (i = 0; i < numverts; i++) { + float co[6]; + + copy_v3_v3(&co[0*3], verts[i].x); + copy_v3_v3(&co[1*3], verts[i].tx); + + BLI_bvhtree_insert(cloth_bvh, i, co, 2); + } + /* balance tree */ + BLI_bvhtree_balance(cloth_bvh); + + collobjs = get_collisionobjects(clmd->scene, ob, clmd->coll_parms->group, &numcollobj, eModifierType_Collision); + if (!collobjs) { + *r_collider_contacts = NULL; + *r_totcolliders = 0; + return; + } + + /* move object to position (step) in time */ + for (i = 0; i < numcollobj; i++) { + Object *collob= collobjs[i]; + CollisionModifierData *collmd = (CollisionModifierData *)modifiers_findByType(collob, eModifierType_Collision); + if (!collmd->bvhtree) + continue; + + /* move object to position (step) in time */ + collision_move_object ( collmd, step + dt, step ); + } + + collider_contacts = MEM_callocN(sizeof(ColliderContacts) * numcollobj, "CollPair"); + + // check all collision objects + for (i = 0; i < numcollobj; i++) { + ColliderContacts *ct = collider_contacts + i; + Object *collob= collobjs[i]; + CollisionModifierData *collmd = (CollisionModifierData *)modifiers_findByType(collob, eModifierType_Collision); + BVHTreeOverlap *overlap; + unsigned int result = 0; + float epsilon; + + ct->ob = collob; + ct->collmd = collmd; + ct->collisions = NULL; + ct->totcollisions = 0; + + if (!collmd->bvhtree) + continue; + + /* search for overlapping collision pairs */ + overlap = BLI_bvhtree_overlap(cloth_bvh, collmd->bvhtree, &result); + epsilon = BLI_bvhtree_getepsilon(collmd->bvhtree); + + // go to next object if no overlap is there + if (result && overlap) { + CollPair *collisions_index; + + /* check if collisions really happen (costly near check) */ + cloth_points_objcollisions_nearcheck(clmd, collmd, &ct->collisions, &collisions_index, + result, overlap, epsilon, dt); + ct->totcollisions = (int)(collisions_index - ct->collisions); + + // resolve nearby collisions +// ret += cloth_points_objcollisions_resolve(clmd, collmd, collob->pd, collisions[i], collisions_index[i], dt); + } + + if (overlap) + MEM_freeN(overlap); + } + + if (collobjs) + MEM_freeN(collobjs); + + BLI_bvhtree_free(cloth_bvh); + + //////////////////////////////////////////////////////////// + // update positions + // this is needed for bvh_calc_DOP_hull_moving() [kdop.c] + //////////////////////////////////////////////////////////// + + // verts come from clmd + for (i = 0; i < numverts; i++) { + if (clmd->sim_parms->flags & CLOTH_SIMSETTINGS_FLAG_GOAL) { + if (verts [i].flags & CLOTH_VERT_FLAG_PINNED) { + continue; + } + } + + VECADD(verts[i].tx, verts[i].txold, verts[i].tv); + } + //////////////////////////////////////////////////////////// + + *r_collider_contacts = collider_contacts; + *r_totcolliders = numcollobj; +} + +void cloth_free_contacts(ColliderContacts *collider_contacts, int totcolliders) +{ + if (collider_contacts) { + int i; + for (i = 0; i < totcolliders; ++i) { + ColliderContacts *ct = collider_contacts + i; + if (ct->collisions) { + MEM_freeN(ct->collisions); + } + } + MEM_freeN(collider_contacts); + } +} |