rem: OSGMatrix m;
add: Matrix m;
context: display(void){	float a = glutGet( GLUT_ELAPSED_TIME );	glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );	OSGMatrix m;	m.setTranslate( sin(a/1500), cos(a/1500), 1 );	osgBeginEditCP(tr);	tr->getSFMatrix()->setValue( m );	osgEndEditCP(tr);		dact->apply( root );	glutSwapBuffers();}