[Bf-blender-cvs] SVN commit: /data/svn/bf-blender [57435] trunk/blender/release/scripts/ modules/bpy_extras/object_utils.py: minor edits to world_to_camera() utility function, include Z so you can tell if the points in font of the camera and avoid divide by zero .

[Campbell Barton]

Revision: 57435
          http://projects.blender.org/scm/viewvc.php?view=rev&root=bf-blender&revision=57435
Author:   campbellbarton
Date:     2013-06-13 14:07:36 +0000 (Thu, 13 Jun 2013)
Log Message:
-----------
minor edits to world_to_camera() utility function, include Z so you can tell if the points in font of the camera and avoid divide by zero.

Modified Paths:
--------------
    trunk/blender/release/scripts/modules/bpy_extras/object_utils.py

Modified: trunk/blender/release/scripts/modules/bpy_extras/object_utils.py
===================================================================
--- trunk/blender/release/scripts/modules/bpy_extras/object_utils.py	2013-06-13 13:55:05 UTC (rev 57434)
+++ trunk/blender/release/scripts/modules/bpy_extras/object_utils.py	2013-06-13 14:07:36 UTC (rev 57435)
@@ -287,13 +287,18 @@
     :return: normalized 2d vector.
     :rtype: :class:`mathutils.Vector`
     """
+    from mathutils import Vector
 
     co_local = obj.matrix_world.normalized().inverted() * coord
+    z = -co_local.z
 
     camera = obj.data
     frame = [-v for v in camera.view_frame(scene=scene)[:3]]
     if camera.type != 'ORTHO':
-        frame = [(v / -v.z) * co_local.z for v in frame]
+        if z == 0.0:
+            return Vector((0.5, 0.5, 0.0))
+        else:
+            frame = [(v / (v.z / z)) for v in frame]
 
     min_x, max_x = frame[1].x, frame[2].x
     min_y, max_y = frame[0].y, frame[1].y
@@ -301,5 +306,4 @@
     x = (co_local.x - min_x) / (max_x - min_x)
     y = (co_local.y - min_y) / (max_y - min_y)
 
-    from mathutils import Vector
-    return Vector((x, y))
+    return Vector((x, y, z))