Revision: 38449
http://projects.blender.org/scm/viewvc.php?view=rev&root=bf-blender&revision=38449
Author: campbellbarton
Date: 2011-07-17 12:40:18 +0000 (Sun, 17 Jul 2011)
Log Message:
-----------
patch [#28001] Find the nearest point on an object to the given location
from Andrew Hale (trumanblending)
Modified Paths:
--------------
trunk/blender/source/blender/makesrna/intern/rna_object_api.c
Modified: trunk/blender/source/blender/makesrna/intern/rna_object_api.c
===================================================================
--- trunk/blender/source/blender/makesrna/intern/rna_object_api.c
2011-07-17 12:37:38 UTC (rev 38448)
+++ trunk/blender/source/blender/makesrna/intern/rna_object_api.c
2011-07-17 12:40:18 UTC (rev 38449)
@@ -415,6 +415,41 @@
*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 @@
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.");
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