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.

1 files changed, 7 insertions, 3 deletions

diff --git a/release/scripts/modules/bpy_extras/object_utils.py b/release/scripts/modules/bpy_extras/object_utils.py
index 7d7654d01af..7412d34940f 100644
--- a/release/scripts/modules/bpy_extras/object_utils.py
+++ b/release/scripts/modules/bpy_extras/object_utils.py
@@ -287,13 +287,18 @@ def world_to_camera(scene, obj, coord):
     :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 @@ def world_to_camera(scene, obj, coord):
     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))