/**
* @brief Starts a transition effect on this object.
*
* The transition will be automatically deleted when finished or stopped.
* Any previous transition is stopped.
*
* @param transition The transition to start.
* @param callback_ref A Lua registry ref to the function to call when
* the transition finishes, or LUA_REFNIL.
* @param lua_context The Lua world for the callback (or NULL).
*/
void Drawable::start_transition(Transition& transition,
int callback_ref, LuaContext* lua_context) {
stop_transition();
this->transition = &transition;
this->transition_callback_ref = callback_ref;
this->lua_context = lua_context;
transition.start();
}
/**
* \brief Destructor.
*/
Drawable::~Drawable() {
stop_transition();
stop_movement();
}