cam_pos      = [0.0916242, 1.43392, 0.361685]';
cam_dir      = [-0.792135, -0.0118915, 0.61023]';
cam_up       = [-0.0640372, 0.995911, -0.063719]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [0.807281, 0.119103, 1.05024]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;