cam_pos      = [0.611045, 1.45645, 1.1416]';
cam_dir      = [-0.105527, -0.0800921, 0.991186]';
cam_up       = [-0.0276578, 0.996602, 0.0775852]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [1.32206, 0.0255715, 0.142819]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;