cam_pos      = [-0.452627, 1.46552, 0.529521]';
cam_dir      = [0.835755, -0.0699246, 0.544633]';
cam_up       = [0.480492, 0.573224, -0.663733]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [0.353494, -1.08583, -0.681855]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;