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/*
* $Id: MainLoop.d,v 1.1.1.1 2003/09/19 14:55:49 kenta Exp $
*
* Copyright 2003 Kenta Cho. All rights reserved.
*/
module abagames.util.sdl.MainLoop;
import std.c.stdlib;
import SDL;
import abagames.util.Logger;
import abagames.util.Rand;
import abagames.util.GameManager;
import abagames.util.PrefManager;
import abagames.util.sdl.Screen;
import abagames.util.sdl.Input;
import abagames.util.sdl.Sound;
import abagames.util.sdl.SDLInitFailedException;
/**
* SDL main loop.
*/
public class MainLoop {
public:
const int INTERVAL_BASE = 16;
int interval = INTERVAL_BASE;
int accframe = 0;
int maxSkipFrame = 5;
SDL_Event event;
private:
Screen screen;
Input input;
GameManager gameManager;
PrefManager prefManager;
public this(Screen screen, Input input,
GameManager gameManager, PrefManager prefManager) {
this.screen = screen;
this.input = input;
gameManager.setMainLoop(this);
gameManager.setUIs(screen, input);
gameManager.setPrefManager(prefManager);
this.gameManager = gameManager;
this.prefManager = prefManager;
}
// Initialize and load preference.
private void initFirst() {
prefManager.load();
try {
Sound.init();
} catch (SDLInitFailedException e) {
Logger.error(e);
}
gameManager.init();
}
// Quit and save preference.
private void quitLast() {
gameManager.close();
Sound.close();
prefManager.save();
screen.closeSDL();
SDL_Quit();
}
public void loop() {
int done = 0;
long prvTickCount = 0;
int i;
long nowTick;
int frame;
try {
screen.initSDL();
} catch (SDLInitFailedException e) {
Logger.error(e);
exit(EXIT_FAILURE);
}
initFirst();
gameManager.start();
while (!done) {
SDL_PollEvent(&event);
input.handleEvent(&event);
if (input.keys[SDLK_ESCAPE] == SDL_PRESSED || event.type == SDL_QUIT)
done = 1;
nowTick = SDL_GetTicks();
frame = cast(int) (nowTick-prvTickCount) / interval;
if (frame <= 0) {
frame = 1;
SDL_Delay(cast(uint) (prvTickCount+interval-nowTick));
if (accframe) {
prvTickCount = SDL_GetTicks();
} else {
prvTickCount += interval;
}
} else if (frame > maxSkipFrame) {
frame = maxSkipFrame;
prvTickCount = nowTick;
} else {
prvTickCount += frame * interval;
}
for (i = 0; i < frame; i++) {
gameManager.move();
}
screen.clear();
gameManager.draw();
screen.flip();
}
quitLast();
}
}
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