cam_pos      = [0.0338989, 1.46348, 0.74509]';
cam_dir      = [0.47265, 0.00369525, 0.881243]';
cam_up       = [-0.0345336, 0.999301, 0.0143316]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [1.17116, 0.0494845, -0.628355]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;