cam_pos      = [0.0957675, 1.55065, 0.807632]';
cam_dir      = [0.996717, -0.0698399, 0.0409554]';
cam_up       = [0.0668473, 0.424499, -0.902958]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-0.0607504, -1.20063, -0.568939]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;