[Bf-blender-cvs] SVN commit: /data/svn/bf-blender [15504] trunk/blender/source/gameengine/ Ketsji/KX_GameObject.cpp: bugfix, vector was not checked for zero length before normalizing, closing blender instantly with an assert.

[Campbell Barton]

Revision: 15504
          http://projects.blender.org/plugins/scmsvn/viewcvs.php?view=rev&root=bf-blender&revision=15504
Author:   campbellbarton
Date:     2008-07-09 17:30:15 +0200 (Wed, 09 Jul 2008)

Log Message:
-----------
bugfix, vector was not checked for zero length before normalizing, closing blender instantly with an assert.

Modified Paths:
--------------
    trunk/blender/source/gameengine/Ketsji/KX_GameObject.cpp

Modified: trunk/blender/source/gameengine/Ketsji/KX_GameObject.cpp
===================================================================
--- trunk/blender/source/gameengine/Ketsji/KX_GameObject.cpp	2008-07-09 15:25:34 UTC (rev 15503)
+++ trunk/blender/source/gameengine/Ketsji/KX_GameObject.cpp	2008-07-09 15:30:15 UTC (rev 15504)
@@ -1608,14 +1608,18 @@
 		other = static_cast<KX_GameObject*>(pyfrom);
 		fromPoint = other->NodeGetWorldPosition();
 	}
-
-	if (dist != 0.0f)
-	{
+	
+	if (dist != 0.0f) {
 		MT_Vector3 toDir = toPoint-fromPoint;
+		if (MT_fuzzyZero(toDir.length2())) {
+			return Py_BuildValue("OOO", Py_None, Py_None, Py_None);
+		}
 		toDir.normalize();
 		toPoint = fromPoint + (dist) * toDir;
+	} else if (MT_fuzzyZero((toPoint-fromPoint).length2())) {
+		return Py_BuildValue("OOO", Py_None, Py_None, Py_None);
 	}
-
+	
 	MT_Point3 resultPoint;
 	MT_Vector3 resultNormal;
 	PHY_IPhysicsEnvironment* pe = GetPhysicsEnvironment();