cam_pos      = [0.698379, 1.64486, 0.327699]';
cam_dir      = [-0.502695, -0.436989, -0.745881]';
cam_up       = [-0.0798652, 0.882612, -0.463269]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-1.14482, 0.230506, 0.636518]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;