cam_pos      = [-0.398768, 1.3529, 0.472351]';
cam_dir      = [-0.751262, 0.125593, -0.647945]';
cam_up       = [0.649263, 0.317033, -0.691338]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-0.157727, 1.25028, 0.425224]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;