cam_pos      = [1.02096, 1.7689, 1.46983]';
cam_dir      = [-0.0610768, 0.0455622, -0.997093]';
cam_up       = [-0.341556, 0.937696, 0.06377]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-1.24737, -0.458128, 0.0554735]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;