code: public void setPerspective() {
  		double cameraZ = ((height / 2.0) / Math.tan(Math.PI * 60.0 / 360.0));
  		matrixMode(MatrixMode.PROJECTION);
  		resetMatrix();
  		glu.gluPerspective(Math.PI / 3.0, this.width
  				/ this.height, cameraZ / 10.0, cameraZ * 10.0);
  		matrixMode(MatrixMode.MODELVIEW);
  		resetMatrix();
  	}
docs: Sets a default perspective.