Abstracted character controller interface

Renamed old character controller to DynamicCharacterController
First start at KinematicCharacterController. Still has bugs.

Demos/CharacterDemo/KinematicCharacterController.h

@@ -0,0 +1,61 @@
+#ifndef KINEMATIC_CHARACTER_CONTROLLER_H
+#define KINEMATIC_CHARACTER_CONTROLLER_H
+
+#include "LinearMath/btVector3.h"
+
+#include "CharacterControllerInterface.h"
+
+class btCollisionShape;
+class btRigidBody;
+class btDynamicsWorld;
+
+class KinematicCharacterController : public CharacterControllerInterface
+{
+protected:
+	btScalar m_halfHeight;
+	btConvexShape* m_shape;
+	btRigidBody* m_rigidBody;
+	btOverlappingPairCache* m_pairCache;
+
+	btScalar m_turnAngle;
+	btScalar m_walkVelocity;
+
+	btScalar m_height;
+	btScalar m_width;
+	btScalar m_stepHeight;
+
+	btVector3 m_upDirection;
+	btVector3 m_forwardDirection;
+	btVector3 m_strafeDirection;
+
+	btVector3 m_currentPosition;
+	btScalar  m_currentStepOffset;
+	btVector3 m_targetPosition;
+	
+	void recoverFromPenetration (btDynamicsWorld* dynamicsWorld);
+	void stepUp (btDynamicsWorld* dynamicsWorld);
+	void updateTargetPositionBasedOnCollision (const btVector3& hit_normal, btScalar tangentMag = btScalar(1.0), btScalar normalMag = btScalar(0.0));
+	void stepForwardAndStrafe (btDynamicsWorld* dynamicsWorld, const btVector3& walkMove);
+	void stepDown (btDynamicsWorld* dynamicsWorld, btScalar dt);
+public:
+	KinematicCharacterController ();
+	~KinematicCharacterController ();
+	void setup (btDynamicsWorld* dynamicsWorld, btScalar height = btScalar(1.75), btScalar width = btScalar(0.4), btScalar stepHeight = btScalar(0.35));
+	void destroy (btDynamicsWorld* dynamicsWorld);
+
+	btRigidBody* getRigidBody ();
+
+	void registerPairCache (btOverlappingPairCache* pairCache);
+	void preStep (btDynamicsWorld* dynamicsWorld);
+	void playerStep (btDynamicsWorld* dynamicsWorld, btScalar dt,
+					 int forward,
+					 int backward,
+					 int left,
+					 int right);
+	bool canJump () const;
+	void jump ();
+
+	bool onGround () const;
+};
+
+#endif // KINEMATIC_CHARACTER_CONTROLLER_H