cam_pos      = [-0.38889, 1.12956, 1.11371]';
cam_dir      = [0.841792, 0.0138799, -0.539624]';
cam_up       = [-0.158147, 0.962146, -0.221955]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-0.686434, -0.361999, -1.08012]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;