* Added AnimationManager::getTopAnimationID(x, y) which returns the ID of the top layer animation located on a point
* Added Animation::getScale{X,Y}()
* Fixed a few bugs related to animations sometimes having no frames
svn-id: r42836
* Added Game::getNumObjects() which returns the number of objects in the game
* Fixed segfault (accessing a null Animation *)
* Added some docs to various things
svn-id: r42683
* Fixed bug in Animation::nextFrame() which caused non-looping animations to linger on forever
* Stopped setting looping to false explicitly in AnimationManager::addAnimation() since the Animation constructor already does that
svn-id: r42657
* Instead, Animation::nextFrame() marks both the old and the new frame dirty. This makes it possible to only update the real screen when the animation changes and results in a pretty big speedup.
* Added utility method Animation::markDirtyRect() which takes a (Surface *) and marks a dirty rect on it for the current frame.
* Fixed artifacts when moving the dragon.
svn-id: r42652
* Now each Sprite (and hence frame in an animation) can have a separate zoom (which is needed for some animations in the game)
* Scale factors are not stored any more; instead, we only store scaled dimensions (since these are stored in the data files) and calculate the factors from those.
svn-id: r42647
* Made the dragon scale when it is in different parts of the room
* Added getters for relative coordinates (Animation::getRelativeX() and Animation::getRelativeY())
* Commented Game::loop() and Sprite::draw*() methods in more detail
svn-id: r42627
* Added support for sorting animations when Z is changed later on (AnimationManager::sortAnimations())
* Added support for relative coordinates (Animation::setRelative())
* Fixed bug where AnimationManager::deleteOverlays() deleted all animations
svn-id: r42579
* Reordered Animation::nextFrame() a bit to make sure the timings are correct (particularly the last frame)
* Added checks to AnimationManager::play() and AnimationManager::stop() so it doesn't dereference a null pointer.
svn-id: r42243
* Implemented actual animation (previously only the first frame was display)
* Implemented animation starting, stoping, looping
* Loaded looping dragon animation as a test
svn-id: r42114
