1fn main() { 2 let camera = cgmatrix::viewing_matrix([0.0, 0.0, 200.0], [0.0, 1.0, 0.0], [0.0, 0.0, 0.0]); 3 let theta = 0.5; 4 let mv_matrix = cgmatrix::matmul(cgmatrix::rotate_x(theta), camera); 5 println!("{:?}", mv_matrix); 6}