cam_pos      = [-1.11697, 1.65164, -0.224776]';
cam_dir      = [0.0659306, -0.390663, 0.91817]';
cam_up       = [0.0541562, 0.920216, 0.387645]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [1.32515, -0.032142, -0.10883]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;