cam_pos      = [-1.12244, 1.46327, 0.208082]';
cam_dir      = [0.170494, -0.267947, 0.948228]';
cam_up       = [0.17329, 0.955473, 0.238836]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [1.2901, -0.164387, -0.278414]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;