Refactor Physics to separate PhysicsBackend

#673

Source/Engine/Physics/Actors/IPhysicsActor.h

@@ -2,36 +2,27 @@
 
 #pragma once
 
-namespace physx
-{
-    class PxRigidActor;
-    class PxTransform;
-}
-
 /// <summary>
 /// A base interface for all physical actors types/owners that can responds on transformation changed event.
 /// </summary>
 class FLAXENGINE_API IPhysicsActor
 {
 public:
-
     /// <summary>
     /// Finalizes an instance of the <see cref="IPhysicsActor"/> class.
     /// </summary>
     virtual ~IPhysicsActor() = default;
 
     /// <summary>
-    /// Gets the rigid actor (PhysX object) may be null.
+    /// Gets the native physics backend object.
     /// </summary>
-    /// <returns>PhysX rigid actor or null if not using</returns>
-    virtual physx::PxRigidActor* GetRigidActor() = 0;
+    virtual void* GetPhysicsActor() const = 0;
 
     /// <summary>
-    /// Called when actor's active transformation gets changed after the physics simulation step.
+    /// Called when actor's active transformation gets changed after the physics simulation step during.
     /// </summary>
     /// <remarks>
     /// This event is called internally by the Physics service and should not be used by the others.
     /// </remarks>
-    /// <param name="transform">The current transformation.</param>
-    virtual void OnActiveTransformChanged(const physx::PxTransform& transform) = 0;
+    virtual void OnActiveTransformChanged() = 0;
 };