cam_pos      = [0.582435, 1.46994, 0.19439]';
cam_dir      = [-0.772096, -0.0798018, -0.630475]';
cam_up       = [0.0577535, 0.979168, -0.194664]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-0.841725, 0.248326, 0.999366]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;