BGE patch 18065: gameobj mass writeable + setmass actuator. This patch allows to change the mass of a dynamic or rigid body object during the game. Two methods are available: in a Python script by setting the mass attribute of the game object; by logic brick with the Edit Object->Dynamics->Set Mass actuator. The mass can only be set on dynamic objects and must be a positive floating point value.

source/gameengine/Ketsji/KX_SumoPhysicsController.cpp

@@ -205,6 +205,10 @@ MT_Scalar	KX_SumoPhysicsController::GetMass()
 	return SumoPhysicsController::getMass();
 }
 
+void	KX_SumoPhysicsController::SetMass(MT_Scalar newmass)
+{
+}
+
 MT_Scalar	KX_SumoPhysicsController::GetRadius()
 {
 	return SumoPhysicsController::GetRadius();