void ApplicationState::addDrawableObject(DrawableObject& drawable)
{
drawableObjects.push_back(&drawable);
if (drawable.isClickable())
addClickableObject(drawable, drawable.getLayer());
}
void ApplicationState::addClickableObject(DrawableObject& clickable, int z)
{
if (!clickable.isClickable())
return;
clickableObjects[z].insert(clickable);
}