/*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 "init.h"/*Initalises a whole load of variables*/void initVars(){	srand(time(NULL));	for (int i = 0 ; i < 200 ; i++)	{		star[i].x = rand() % 800;		star[i].y = rand() % 600;		star[i].speed = 1 + (rand() % 3);	}	// These are good values for sound and music	if (engine.useAudio)	{		Mix_Volume(-1, 25);		Mix_VolumeMusic((int)engine.musicVolume);	}}/*Something went wrong. This stops the game, present the error message andprompts the user to press space or ctrl to exit the game. This is unlikely tobe seen by people unless something really stoopid happens!*/void showErrorAndExit(int errorId, char *name){	graphics.clearScreen(graphics.black);	if (errorId != 2)	{		graphics.drawString("A file error has occurred", -1, 200, FONT_RED);	}	else	{		printf("Couldn't create or write to directory '%s'\n", name);		exit(1);	}	char string[255];	switch(errorId)	{		case 0:			strcpy(string, "");			sprintf(string, "%s was not found in the Starfighter data package", name);			graphics.drawString(string, -1, 250, FONT_WHITE);			graphics.drawString("Please try again. If this error persists, contact Parallel Realities", -1, 275, FONT_WHITE);			graphics.drawString("or reinstall the game", -1, 300, FONT_WHITE);			break;		case 1:			graphics.drawString("Project: Starfighter encountered an error whilst", -1, 250, FONT_WHITE);			graphics.drawString("attempting to load game data. Please try running", -1, 275, FONT_WHITE);			graphics.drawString("the game again. If the errors persist, reinstall the game", -1, 300, FONT_WHITE);			break;		case 2:			graphics.drawString("Project: Starfighter encountered a critical error", -1, 250, FONT_WHITE);			graphics.drawString("while attempting to perform a required program function.", -1, 275, FONT_WHITE);			graphics.drawString("Please contact Parallel Realities with details", -1, 300, FONT_WHITE);			break;	}	graphics.drawString("Project: Starfighter will now exit", -1, 450, FONT_WHITE);	graphics.drawString("Press Space to continue", -1, 475, FONT_WHITE);	engine.keyState[SDLK_SPACE] = 0;	while (!engine.keyState[SDLK_SPACE])	{		getPlayerInput();		graphics.updateScreen();	}	exit(1);}/*This bit is just for Linux users. It attempts to get the user'shome directory, then creates the .parallelrealities and .parallelrealities/starfighterdirectories so that saves and temporary data files can be written there. Good, eh? :)*/#if LINUXvoid setupUserHomeDirectory(){	char *userHome;	char *name = getlogin();		passwd *pass;	if (name != NULL)		pass = getpwnam(name);	else		pass = getpwuid(geteuid());	if (pass == NULL)	{		printf("Couldn't determine the user home directory. Exitting.\n");		exit(1);	}	userHome = pass->pw_dir;	char dir[PATH_MAX];	strcpy(dir, "");	sprintf(dir, "%s/.parallelrealities", userHome);	if ((mkdir(dir, S_IRWXU|S_IRWXG|S_IROTH|S_IXOTH) != 0) && (errno != EEXIST))		showErrorAndExit(2, dir);	sprintf(dir, "%s/.parallelrealities/starfighter", userHome);	if ((mkdir(dir, S_IRWXU|S_IRWXG|S_IROTH|S_IXOTH) != 0) && (errno != EEXIST))		showErrorAndExit(2, dir);	sprintf(engine.userHomeDirectory, "%s/.parallelrealities/starfighter/", userHome);}#endif/*Chugg chugg chugg.... brrr... chugg chugg chugg...brrrrrr... chugg ch..BRRRRRRRRRRRRRRRRRMMMMMMMMMMMMMMMMMMM!! Well, hopefully anyway! ;)*/void initSystem(){	strcpy(engine.userHomeDirectory, "");	#if LINUX		setupUserHomeDirectory();	#endif	/* Initialize the SDL library */	if (SDL_Init(SDL_INIT_VIDEO|SDL_INIT_AUDIO) < 0) {		printf("Couldn't initialize SDL: %s\n", SDL_GetError());		exit(1);	}	currentGame.useSound = 1;	currentGame.useMusic = 1;	currentGame.fullScreen = 0;	char filename[PATH_MAX];	int fullScreen = 0, useSound = 1, useMusic = 1;	FILE *fp;	sprintf(filename, "%sconf", engine.userHomeDirectory);	fp = fopen(filename, "rb");	if (fp != NULL)	{		fscanf(fp, "%d %d %d", &fullScreen, &useSound, &useMusic);		fclose(fp);	}	currentGame.fullScreen = fullScreen;	currentGame.useSound = useSound;	currentGame.useMusic = useMusic;	SDL_WM_SetCaption("Project: Starfighter", "starfighter");	SDL_WM_SetIcon(loadImage("gfx/alienDevice.png"), NULL);	if (currentGame.fullScreen)		graphics.screen = SDL_SetVideoMode(800, 600, 16, SDL_HWPALETTE|SDL_FULLSCREEN);	else		graphics.screen = SDL_SetVideoMode(800, 600, 0, SDL_HWPALETTE);	if (graphics.screen == NULL) {		printf("Couldn't set 800x600x16 video mode: %s\n", SDL_GetError());		exit(1);	}	if (engine.useAudio)	{		if (Mix_OpenAudio(22050, AUDIO_S16, engine.useAudio, 1024) < 0)		{			printf("Warning: Couldn't set 22050 Hz 16-bit audio - Reason: %s\n", Mix_GetError());			printf("Sound and Music will be disabled\n");			engine.useAudio = 0;		}	}	SDL_ShowCursor(SDL_DISABLE);	SDL_EventState(SDL_MOUSEMOTION, SDL_DISABLE);}/*Removes [hopefully] all the resources that has beenloaded and created during the game. This is called byatexit();*/void cleanUp(){	printf("Cleaning Up...\n");	printf("Freeing Graphics\n");	graphics.freeGraphics();	printf("Freeing Background\n");	SDL_FreeSurface(graphics.background);	printf("Freeing Sounds\n");	freeSound();	printf("Resetting Lists\n");	resetLists();	delete(engine.bulletHead);	delete(engine.explosionHead);	delete(engine.collectableHead);	delete(graphics.bufferHead);	printf("Freeing Font\n");	for (int i = 0 ; i < MAX_FONTSHAPES ; i++)	{		if (graphics.fontShape[i] != NULL)			SDL_FreeSurface(graphics.fontShape[i]);	}	printf("Removing Mod\n");	char filename[PATH_MAX];	strcpy(filename, "");		sprintf(filename, "%smusic.mod", engine.userHomeDirectory);	remove(filename);	sprintf(filename, "%smusic.s3m", engine.userHomeDirectory);	remove(filename);	if (engine.useAudio)	{		printf("Closing Audio\n");		Mix_CloseAudio();	}	// Save the config using current settings	FILE *fp;	sprintf(filename, "%sconf", engine.userHomeDirectory);	fp = fopen(filename, "wb");	if (fp != NULL)	{		fprintf(fp, "%d %d %d\n", currentGame.fullScreen, currentGame.useSound, currentGame.useMusic);		fclose(fp);	}	else	{		printf("Error saving config\n");	}	SDL_Quit();	printf("Done Cleaning Up...\nThank You for playing Starfighter\n");}