+Rock::Rock(const Reader& reader, std::string spritename) :
+ MovingSprite(reader, spritename),
+ physic(),
+ on_ground(),
+ grabbed(),
+ last_movement()
+{
+ sound_manager->preload(ROCK_SOUND);
+ on_ground = false;
+ grabbed = false;
+ set_group(COLGROUP_MOVING_STATIC);