gluPerspective(fov, (float)windowWidth/(float)windowHeight, zNear, zFar);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
tess.gluTessProperty(GLU_TESS_WINDING_RULE, GLU_TESS_WINDING_POSITIVE);
GLUtessellatorCallback callback = new TessCallback();
tess.gluTessCallback(GLU_TESS_VERTEX, callback);
tess.gluTessCallback(GLU_TESS_BEGIN, callback);
tess.gluTessCallback(GLU_TESS_END, callback);
tess.gluTessCallback(GLU_TESS_COMBINE, callback);
/*