let program = solid_fill_program(&display);
let bounds = Cube { xmin: -2., xmax: 0.7, ymin: -1., ymax: 1., zmin: -1.1, zmax: 1.1 };
let bbox = BoundingBox::new(&display, &bounds, &program);
let program = solid_fill_program(&display);
let bounds = Cube { xmin: -2., xmax: 0.7, ymin: -1., ymax: 1., zmin: -1.1, zmax: 1.1 };
let bbox = BoundingBox::new(&display, &bounds, &program);