// gl.gluPerspective(45.0f,aspect,0.01f,10.0f);
Point3D viewpoint = nav.getDirection().add(nav.viewer);
glu.gluLookAt(nav.viewer.x, nav.viewer.y, nav.viewer.z, viewpoint.x, viewpoint.y, viewpoint.z, nav.getUp().x, nav.getUp().y, nav.getUp().z);
// gl.glFrustum( -1.0, 1.0, -1.0, 1.0, 10.0, 100.0 );
gl.glEnable(GL.GL_DEPTH_TEST);
render(gl);
gl.glFlush();