source: GTP/trunk/App/Demos/Vis/FriendlyCulling/src/Transform3.h @ 3359

#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; }

        void InitFrame();


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