0
J'essaie d'utiliser delta pour déplacer un rectangle. Cependant, quand je le multiplie par la vitesse et l'ajoute à la position du rectangle x, le rectangle ne bouge pas. Je pensais que le problème pouvait résider dans la boucle du jeu, mais je ne pense pas que ce soit le cas. Voici le code:Le rectangle ne bouge pas lorsqu'il est multiplié par le temps delta
package Main;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.image.BufferStrategy;
import javax.swing.JFrame;
import javax.swing.JPanel;
//do double buffering
public class Game extends Canvas {
int x, y;
private static final long serialVersionUID = 1L;
public static final int height = 400;
public static final int width = height * 16/9;
JPanel p;
Game game;
Image buffer;
KeyListener kl;
MouseListener ml;
public boolean running = true;
public Game(){
kl = new KeyListener(){
public void keyPressed(KeyEvent e) {
}
public void keyReleased(KeyEvent e) {
}
public void keyTyped(KeyEvent e) {
}
};
ml = new MouseListener(){
public void mousePressed(MouseEvent e) {
}
public void mouseReleased(MouseEvent e) {
}
public void mouseClicked(MouseEvent e) {
}
public void mouseEntered(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
};
}
public void update(double delta){
x += 10/1000 * delta;
}
public void render(){
BufferStrategy bs = getBufferStrategy();
if(bs==null){
createBufferStrategy(2);
return;
}
Graphics g = bs.getDrawGraphics();
g.clearRect(0, 0, getWidth(), getHeight());
g.setColor(Color.BLACK);
g.fillRect(x, y, 100, 100);
g.dispose();
bs.show();
}
public void run(){
//initialize time loop variables
long lastLoopTime = System.nanoTime();
final int TARGET_FPS = 60;
final long OPTIMAL_TIME = 1000000000/TARGET_FPS;
double lastFpsTime = 0;
//Main game loop
while(running)
{
//Calculate since last update
long now = System.nanoTime();
long updateLength = now - lastLoopTime;
lastLoopTime = now;
double delta = updateLength/((double)OPTIMAL_TIME);
//update frame counter
lastFpsTime += updateLength;
//update FPS counter
if(lastFpsTime >= 1000000000)
{
lastFpsTime = 0;
}
//game updates
game.update(delta);
//graphics (gameState)
game.render();
try{
Thread.sleep((Math.abs(lastLoopTime - System.nanoTime() + OPTIMAL_TIME)/1000000));
}catch(Exception e){
System.out.println("Error in sleep");
}
}
}
public void start(){
JFrame frame = new JFrame("Game");
game = new Game();
frame.add(game);
frame.pack();
frame.setSize(width, height);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
frame.addKeyListener(kl);
frame.addMouseListener(ml);
frame.setVisible(true);
run();
}
public static void main(String[] args){
new Game().start();
}
}