cam_pos      = [0.062922, 0.995296, 1.07379]';
cam_dir      = [0.788539, 0.558972, 0.256431]';
cam_up       = [-0.604427, 0.62748, 0.490853]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-0.150911, 0.720928, -1.10742]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;