Beispiel #1
0
static void rna_Object_ray_cast(
        Object *ob, ReportList *reports,
        float origin[3], float direction[3], float distance,
        int *r_success, float r_location[3], float r_normal[3], int *r_index)
{
	bool success = false;

	if (ob->derivedFinal == NULL) {
		BKE_reportf(reports, RPT_ERROR, "Object '%s' has no mesh data to be used for ray casting", ob->id.name + 2);
		return;
	}

	/* Test BoundBox first (efficiency) */
	BoundBox *bb = BKE_object_boundbox_get(ob);
	float distmin;
	if (!bb || (isect_ray_aabb_v3_simple(origin, direction, bb->vec[0], bb->vec[6], &distmin, NULL) && distmin <= distance)) {

		BVHTreeFromMesh treeData = {NULL};

		/* no need to managing allocation or freeing of the BVH data. this is generated and freed as needed */
		bvhtree_from_mesh_looptri(&treeData, ob->derivedFinal, 0.0f, 4, 6);

		/* may fail if the mesh has no faces, in that case the ray-cast misses */
		if (treeData.tree != NULL) {
			BVHTreeRayHit hit;

			hit.index = -1;
			hit.dist = distance;

			normalize_v3(direction);


			if (BLI_bvhtree_ray_cast(treeData.tree, origin, direction, 0.0f, &hit,
			                         treeData.raycast_callback, &treeData) != -1)
			{
				if (hit.dist <= distance) {
					*r_success = success = true;

					copy_v3_v3(r_location, hit.co);
					copy_v3_v3(r_normal, hit.no);
					*r_index = dm_looptri_to_poly_index(ob->derivedFinal, &treeData.looptri[hit.index]);
				}
			}

			free_bvhtree_from_mesh(&treeData);
		}
	}
	if (success == false) {
		*r_success = false;

		zero_v3(r_location);
		zero_v3(r_normal);
		*r_index = -1;
	}
}
Beispiel #2
0
static void rna_Object_ray_cast(Object *ob,
                                bContext *C,
                                ReportList *reports,
                                float origin[3],
                                float direction[3],
                                float distance,
                                PointerRNA *rnaptr_depsgraph,
                                bool *r_success,
                                float r_location[3],
                                float r_normal[3],
                                int *r_index)
{
  bool success = false;

  if (ob->runtime.mesh_eval == NULL &&
      (ob = eval_object_ensure(ob, C, reports, rnaptr_depsgraph)) == NULL) {
    return;
  }

  /* Test BoundBox first (efficiency) */
  BoundBox *bb = BKE_object_boundbox_get(ob);
  float distmin;
  normalize_v3(
      direction); /* Needed for valid distance check from isect_ray_aabb_v3_simple() call. */
  if (!bb ||
      (isect_ray_aabb_v3_simple(origin, direction, bb->vec[0], bb->vec[6], &distmin, NULL) &&
       distmin <= distance)) {
    BVHTreeFromMesh treeData = {NULL};

    /* No need to managing allocation or freeing of the BVH data.
     * This is generated and freed as needed. */
    BKE_bvhtree_from_mesh_get(&treeData, ob->runtime.mesh_eval, BVHTREE_FROM_LOOPTRI, 4);

    /* may fail if the mesh has no faces, in that case the ray-cast misses */
    if (treeData.tree != NULL) {
      BVHTreeRayHit hit;

      hit.index = -1;
      hit.dist = distance;

      if (BLI_bvhtree_ray_cast(treeData.tree,
                               origin,
                               direction,
                               0.0f,
                               &hit,
                               treeData.raycast_callback,
                               &treeData) != -1) {
        if (hit.dist <= distance) {
          *r_success = success = true;

          copy_v3_v3(r_location, hit.co);
          copy_v3_v3(r_normal, hit.no);
          *r_index = mesh_looptri_to_poly_index(ob->runtime.mesh_eval,
                                                &treeData.looptri[hit.index]);
        }
      }

      free_bvhtree_from_mesh(&treeData);
    }
  }
  if (success == false) {
    *r_success = false;

    zero_v3(r_location);
    zero_v3(r_normal);
    *r_index = -1;
  }
}