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patch [#28001] Find the nearest point on an object to the given location

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from Andrew Hale (trumanblending)
This commit is contained in:
Campbell Barton 2011-07-17 12:40:18 +00:00
parent 7f850ff25d
commit ebf21a9848
1 changed files with 55 additions and 0 deletions
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55
source/blender/makesrna/intern/rna_object_api.c
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@ -415,6 +415,41 @@ void rna_Object_ray_cast(Object *ob, ReportList *reports, float ray_start[3], fl
*index= -1;
}
void rna_Object_closest_point_on_mesh(Object *ob, ReportList *reports, float point_co[3], float n_location[3], float n_normal[3], int *index)
{
BVHTreeFromMesh treeData= {NULL};
if(ob->derivedFinal==NULL) {
BKE_reportf(reports, RPT_ERROR, "object \"%s\" has no mesh data to be used for finding nearest point.", ob->id.name+2);
return;
}
/* no need to managing allocation or freeing of the BVH data. this is generated and freed as needed */
bvhtree_from_mesh_faces(&treeData, ob->derivedFinal, 0.0f, 4, 6);
if(treeData.tree==NULL) {
BKE_reportf(reports, RPT_ERROR, "object \"%s\" could not create internal data for finding nearest point", ob->id.name+2);
return;
}
else {
BVHTreeNearest nearest;
nearest.index = -1;
nearest.dist = FLT_MAX;
if(BLI_bvhtree_find_nearest(treeData.tree, point_co, &nearest, treeData.nearest_callback, &treeData) != -1) {
copy_v3_v3(n_location, nearest.co);
copy_v3_v3(n_normal, nearest.no);
*index= nearest.index;
return;
}
}
zero_v3(n_location);
zero_v3(n_normal);
*index= -1;
}
/* ObjectBase */
void rna_ObjectBase_layers_from_view(Base *base, View3D *v3d)
@ -501,6 +536,26 @@ void RNA_api_object(StructRNA *srna)
parm= RNA_def_int(func, "index", 0, 0, 0, "", "The face index, -1 when no intersection is found.", 0, 0);
RNA_def_function_output(func, parm);
/* Nearest Point */
func= RNA_def_function(srna, "closest_point_on_mesh", "rna_Object_closest_point_on_mesh");
RNA_def_function_ui_description(func, "Find the nearest point on the object.");
RNA_def_function_flag(func, FUNC_USE_REPORTS);
/* ray start and end */
parm= RNA_def_float_vector(func, "point", 3, NULL, -FLT_MAX, FLT_MAX, "", "", -1e4, 1e4);
RNA_def_property_flag(parm, PROP_REQUIRED);
/* return location and normal */
parm= RNA_def_float_vector(func, "location", 3, NULL, -FLT_MAX, FLT_MAX, "Location", "The location on the object closest to the point", -1e4, 1e4);
RNA_def_property_flag(parm, PROP_THICK_WRAP);
RNA_def_function_output(func, parm);
parm= RNA_def_float_vector(func, "normal", 3, NULL, -FLT_MAX, FLT_MAX, "Normal", "The face normal at the closest point", -1e4, 1e4);
RNA_def_property_flag(parm, PROP_THICK_WRAP);
RNA_def_function_output(func, parm);
parm= RNA_def_int(func, "index", 0, 0, 0, "", "The face index, -1 when no intersection is found.", 0, 0);
RNA_def_function_output(func, parm);
/* View */
func= RNA_def_function(srna, "is_visible", "rna_Object_is_visible");
RNA_def_function_ui_description(func, "Determine if object is visible in a given scene.");