Commit: 11bbe69b2af06b388e18999076245454cd1192fd
Author: Campbell Barton
Date: Wed Oct 8 09:42:34 2014 +0200
Branches: blender-v2.72-release
https://developer.blender.org/rB11bbe69b2af06b388e18999076245454cd1192fd
Fix Python ray-cast failing to check hit direction
===================================================================
M source/blender/python/mathutils/mathutils_geometry.c
===================================================================
diff --git a/source/blender/python/mathutils/mathutils_geometry.c
b/source/blender/python/mathutils/mathutils_geometry.c
index b4add0f..0f0ffe9 100644
--- a/source/blender/python/mathutils/mathutils_geometry.c
+++ b/source/blender/python/mathutils/mathutils_geometry.c
@@ -149,6 +149,11 @@ static PyObject *M_Geometry_intersect_ray_tri(PyObject
*UNUSED(self), PyObject *
/* calculate t, ray intersects triangle */
t = dot_v3v3(e2, qvec) * inv_det;
+ /* ray hit behind */
+ if (t < 0.0f) {
+ Py_RETURN_NONE;
+ }
+
mul_v3_fl(dir, t);
add_v3_v3v3(pvec, orig, dir);
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