3 // SuperTux - A Jump'n Run
4 // Copyright (C) 2004 Matthias Braun <matze@braunis.de
6 // This program is free software; you can redistribute it and/or
7 // modify it under the terms of the GNU General Public License
8 // as published by the Free Software Foundation; either version 2
9 // of the License, or (at your option) any later version.
11 // This program is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License
17 // along with this program; if not, write to the Free Software
18 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 #ifndef __GAMEOBJECT_HPP__
20 #define __GAMEOBJECT_HPP__
27 * Base class for all game objects. This contains functions for:
28 * -querying the actual type of the object
29 * -a flag that indicates if the object wants to be removed. Objects with this
30 * flag will be removed at the end of each frame. This is alot safer than
31 * having some uncontrollable "delete this" in the code.
32 * -an action function that is called once per frame and allows the object to
35 * Most GameObjects will also implement the DrawableObject interface so that
36 * they can actually be drawn on screen.
38 class GameObject // TODO rename this once the game has been converted
42 virtual ~GameObject();
44 /** This function is called once per frame and allows the object to update
45 * it's state. The elapsed_time is the time since the last frame and should be
46 * the base for all timed things.
48 virtual void action(float elapsed_time) = 0;
50 /** The GameObject should draw itself onto the provided DrawingContext if this
53 virtual void draw(DrawingContext& context) = 0;
55 /** returns true if the object is not scheduled to be removed yet */
57 { return !wants_to_die; }
58 /** schedules this object to be removed at the end of the frame */
60 { wants_to_die = true; }
63 /** this flag indicates if the object should be removed at the end of the