cam_pos      = [0.0783195, 1.73002, 0.936776]';
cam_dir      = [-0.70909, 0.0588416, 0.702658]';
cam_up       = [-0.394785, 0.79255, -0.464768]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [0.777039, 0.807258, 0.716551]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;