#ifndef __TRANSFORM3_H
#define __TRANSFORM3_H

#include "Matrix4x4.h"
#include "common.h"


namespace CHCDemoEngine 
{

class RenderState;


/** Wrapper class for a 3D transformation
*/
class Transform3
{
public:
	
	/** Creates a transformation.
	*/
	Transform3(const Matrix4x4 &trafo);
	/** The identity transformation.
	*/
	Transform3();
	/** Loads this transformation.
	*/
	void Load(RenderState *state);	
	/** Unloads this transformation
	*/
	void Unload(RenderState *state);
	/** Right multiplies with the given matrix.
	*/
	void MultMatrix(const Matrix4x4 &trafo);
	/** Resets trafo to identiy.
	*/
	void Reset();
	/** Returns the trafo matrix.
	*/
	inline Matrix4x4 GetMatrix() const { return mMatrix; }
	/** See Get
	*/
	inline void SetMatrix(const Matrix4x4 &trafo) ;
	/** Returns the old trafo matrix.
	*/
	inline Matrix4x4 GetOldMatrix() const { return mOldMatrix; }
	/** Returns true if this transformation is the identity.
	*/
	inline bool IsIdentity() const { return mIsIdentity; }


protected:

	/// transform matrix 
	Matrix4x4 mMatrix;
	/// the previous transformation matrix
	Matrix4x4 mOldMatrix;
	/// if this matrix is still the identity matrix
	bool mIsIdentity;
};


void Transform3::SetMatrix(const Matrix4x4 &trafo) 
{ 
	mIsIdentity = false; 
	mOldMatrix = mMatrix; 
	mMatrix = trafo;
}


}

#endif // __TRANSFORM_H