cam_pos      = [-0.0944061, 1.2659, 1.34221]';
cam_dir      = [0.658438, -0.0635338, -0.749948]';
cam_up       = [-0.317365, 0.880075, -0.353197]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-0.90766, -0.625851, -0.743885]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;