if (!pmodel) {
	pmodel = glmReadOBJ("data/soccerball.obj");
	if (!pmodel) exit(0);
	glmUnitize(pmodel);
	glmFacetNormals(pmodel);
	glmVertexNormals(pmodel, 90.0);
    }
 
    glmDraw(pmodel, GLM_SMOOTH);