C++11 lambda + std::function callbacks. eg. sequence of animations

gistfile1.txt

// https://msdn.microsoft.com/en-us/library/dd293599.aspx & https://msdn.microsoft.com/en-us/library/dd293608.aspx
// sequence of tweens/animations called sequentially
tween.go(&width, 200, 1.0).onDone([&]() {
    tween.go(&height, 100, 1.0).onDone([&]() {
        tween.go(&target, ofVec3f(100,200), 1.0).onDone([&]() {
            tween.go(&target, ofVec3f(800,400), 3.0).onDone([&]() {
                tween.go(&rotation, 900, 1.0).onDone([&]() {
                    tween.go(&target, ofVec3f(ofGetWidth()/2, ofGetHeight()/2), 2.0);
                });
            });
        });
    });
});

gistfile2.txt

// min example of tween class callback property + onDone() method...
function<void(void)> callback;
void onDone(function<void(void)> lambda) {
  callback = lambda; // can now fire callback() when tween is finished
}