cam_pos      = [0.0620931, 1.05776, 0.994471]';
cam_dir      = [0.792752, 0.544496, 0.273988]';
cam_up       = [-0.600258, 0.6192, 0.506242]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-0.140972, 0.752498, -1.08755]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;