#ifndef OSG_TRANSFORM
#define OSG_TRANSFORM 1

#include <osg/Group>
#include <osg/Matrix>

namespace osg {

/** Transform - is group which all children
    are transformed by the the Transform's osg::Matrix.  Typical uses
    of the Transform is for positioning objects within a scene or 
    producing trakerball functionality or for animatiion.
*/
class SG_EXPORT Transform : public Group
{
    public :
        Transform();
        Transform(const Matrix& matix);

        virtual Object* clone() const { return new Transform(); }
        virtual bool isSameKindAs(const Object* obj) const { return dynamic_cast<const Transform*>(obj)!=NULL; }
        virtual const char* className() const { return "Transform"; }
        virtual void accept(NodeVisitor& nv) { nv.apply(*this); }

        void setMatrix(const Matrix& mat );
        inline Matrix& getMatrix() { return *_matrix; }
        inline const Matrix& getMatrix() const { return *_matrix; }

        void preMult( const Matrix& mat );
        void preScale( const float sx, const float sy, const float sz );
        void preTranslate( const float tx, const float ty, const float tz );
        void preRotate( const float deg, const float x, const float y, const float z );

    
    protected :
    
        virtual ~Transform();
        
        virtual const bool computeBound() const;

        ref_ptr<Matrix> _matrix;
};

};

#endif