BGE Bugfixes (mostly in the py api)

KX_PolygonMaterial and KX_BlenderMaterial - Added a print function (would raise a python error on printing)

* Crashes *
KX_GameObject SetParent - Disallowed setting a parent to its self, caused a recursion crash.
KX_MeshProxy "materials" attribute was segfaulting because of my recent change - I was wrong, you do need to check material types (no idea why since they are both PyObject * at the base)
KX_VisibilityActuator - Wasn't initialized with PyType_Ready() making it crash on access (own fault) 

* Crashes because of missing NULL checks *
KX_PolygonMaterial's "gl_texture" attribute wasnt checking for a valid m_tface
KX_GameObject - added checks for GetPhysicsController()
KX_RayCast::RayTest - didnt check for a valid physics_environment
KX_SceneActuator's getCamera python function wasnt checking if there was a camera.

1 files changed, 3 insertions, 0 deletions

diff --git a/source/gameengine/Ketsji/KX_RayCast.cpp b/source/gameengine/Ketsji/KX_RayCast.cpp
index 974d4b992a6..8c7612bf663 100644
--- a/source/gameengine/Ketsji/KX_RayCast.cpp
+++ b/source/gameengine/Ketsji/KX_RayCast.cpp
@@ -56,12 +56,15 @@ void KX_RayCast::reportHit(PHY_RayCastResult* result)
 
 bool KX_RayCast::RayTest(PHY_IPhysicsEnvironment* physics_environment, const MT_Point3& _frompoint, const MT_Point3& topoint, KX_RayCast& callback)
 {
+	if(physics_environment==NULL) return false; /* prevents crashing in some cases */
+	
 	// Loops over all physics objects between frompoint and topoint,
 	// calling callback.RayHit for each one.
 	//
 	// callback.RayHit should return true to stop looking, or false to continue.
 	//
 	// returns true if an object was found, false if not.
+	
 	MT_Point3 frompoint(_frompoint);
 	const MT_Vector3 todir( (topoint - frompoint).safe_normalized() );
 	MT_Point3 prevpoint(_frompoint+todir*(-1.f));