/*Copyright (C) 2003 Parallel RealitiesThis program is free software; you can redistribute it and/ormodify it under the terms of the GNU General Public Licenseas published by the Free Software Foundation; either version 2of the License, or (at your option) any later version.This program is distributed in the hope that it will be useful,but WITHOUT ANY WARRANTY; without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the GNU General Public License for more details.You should have received a copy of the GNU General Public Licensealong with this program; if not, write to the Free SoftwareFoundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.*/#include <stdlib.h>#include <string.h>#include "SDL/SDL.h"#include "SDL/SDL_image.h"#include "SDL/SDL_mixer.h"#include "defs.h"#include "structs.h"#include "classes.h"extern int isOnScreen(int x, int y, int w, int h);extern globalEngineVariables engine;extern devVariables dev;extern object enemy[MAX_ALIENS];extern Graphics graphics;