Transform.h

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/* $Id: Transform.h,v 1.6 2002/11/20 15:22:15 cvs Exp $ */

#ifndef __TRANSFORM_H
#define __TRANSFORM_H

#include <esg/Definitions.h>
#include <esg/ESGObject.h>

namespace esg {

class OGSCENE_EXPORT Transform : public ESGObject {
protected:
        Matrix4 _mat;    
        Matrix3 _rotMat; 
        Vector3 _trVec;  
        Vector3 _scVec;  
        bool    _haveAbbrev;
    
        virtual void _duplicate_attributes (const Transform&);

public:
        Transform () : _haveAbbrev(false) { _mat.setIdentity(); }

        Transform (const Matrix4& src) : _mat(src), _haveAbbrev(false) {}

        virtual ~Transform () {}

        virtual Transform* clone (void) const;

        void rotateX (float a);

        void rotateY (float a);

        void rotateZ (float a);

        void rotate (float a, const Vector3& axis);

        void translate (float x, float y, float z);
        
        void scale (float s);

        void scale (float sx, float sy, float sz);

        void scale (const Vector3& s);

        void transform (const Matrix4& mat);

        void setIdentity (void);

        Matrix4& get (void) { return _mat; }

        const Matrix4& get (void) const { return _mat; }

        const Matrix3* getRotation (void) {
            if (!_haveAbbrev) {
                _mat.get(_rotMat, _trVec, _scVec);
                _haveAbbrev = true;
            }
            return &_rotMat;
        }

        const Vector3* getTranslation (void) {
            if (!_haveAbbrev) {
                _mat.get(_rotMat, _trVec, _scVec);
                _haveAbbrev = true;
            }
            return &_trVec;
        }

        const Vector3* getScale (void) {
            if (!_haveAbbrev) {
                _mat.get(_rotMat, _trVec, _scVec);
                _haveAbbrev = true;
            }
            return &_scVec;
        }
};

}; // namespace

#endif // __TRANSFORM_H

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