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| public class DemoTimingMove extends JPanel {
private static final int WIDTH=400;
private static final int HEIGHT=WIDTH;
private static final long TICK = 33;
private static final int SPRITE_WIDTH = 32;
private static final int SPRITE_HEIGHT = SPRITE_WIDTH;
private static final int SPRITE_HORIZONTAL_SPEED = (int)TICK/2;
private static final int SPRITE_JUMP_HEIGHT = SPRITE_HEIGHT+SPRITE_HEIGHT/2;
private static final int JUMP_SPEED = (int)TICK*4;
public DemoTimingMove() {
setPreferredSize(new Dimension(WIDTH,HEIGHT));
setBackground(Color.WHITE);
}
public static void main(String[] args) {
DemoTimingMove panel = new DemoTimingMove();
Model model = new Model();
KeyboardFocusManager.getCurrentKeyboardFocusManager().addKeyEventDispatcher(e->keyListener(e,model));
JFrame frame = showInFrame("Démo", panel);
frame.createBufferStrategy(2);
Point offset=SwingUtilities.convertPoint(panel, new Point(), frame);
TimerTask gameLoop = new TimerTask() {
@Override
public void run() {
gameIteration(frame.getBufferStrategy(), model, panel, offset); }
};
frame.addWindowListener(new WindowAdapter() {
@Override
public void windowClosed(WindowEvent e) {
gameLoop.cancel();
}
});
model.start();
new Timer().scheduleAtFixedRate(gameLoop,TICK,TICK);
//renderLoop(frame, panel, model);
}
private static boolean keyListener(KeyEvent e, Model model) {
boolean consumed=true;
switch( e.getID() ) {
case KeyEvent.KEY_PRESSED:
switch( e.getKeyCode() ) {
case KeyEvent.VK_RIGHT:
model.setHorizontalMove(Model.Direction.RIGHT);
consumed=true;
break;
case KeyEvent.VK_LEFT:
model.setHorizontalMove(Model.Direction.LEFT);
consumed=true;
break;
case KeyEvent.VK_UP:
model.jump();
consumed=true;
break;
}
break;
case KeyEvent.KEY_RELEASED:
switch( e.getKeyCode() ) {
case KeyEvent.VK_RIGHT:
case KeyEvent.VK_LEFT:
model.setHorizontalMove(null);
consumed=true;
break;
}
break;
}
return !consumed;
}
private static void gameIteration(BufferStrategy strategy, Model model, DemoTimingMove panel, Point offset) {
long globalTime=System.currentTimeMillis();
model.doMoves(globalTime);
model.collisions();
final Graphics2D graphics = (Graphics2D)strategy.getDrawGraphics();
try {
graphics.translate(offset.x,offset.y);
graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
graphics.setColor(panel.getBackground());
graphics.fillRect(0,0,panel.getWidth(),panel.getHeight());
model.render(graphics);
}
finally {
graphics.dispose();
}
strategy.show(); // repaint
}
public static class Model {
public enum Direction {
LEFT,RIGHT;
}
private double x,y;
// si les types de move se multiplie, on fera un gestion en boucle (enum/enummap par exemple)
private volatile Move horizontalMove; // modifié sur l'EDT, exploité par la gameLoop, donc pas le même thread
private volatile Move jumpMove; // modifié sur l'EDT, exploité par la gameLoop, donc pas le même thread
private long lastTime;
public Model() {
x=0;
y=(HEIGHT-SPRITE_HEIGHT)/2d;
}
public void jump() {
if ( jumpMove==null ) { // on n'annule jamis un saut (on ne peut pas sauter pendant qu'on saute, gérer le double saut se fera sur le saut lui même éventuellement
jumpMove = new JumpMove(JUMP_SPEED,y,y-SPRITE_JUMP_HEIGHT);
}
}
public void setHorizontalMove(Direction dir) {
if ( dir==null ) {
this.horizontalMove=null;
}
else {
switch (dir) {
case RIGHT:
this.horizontalMove=new BoundMove(TICK,x,x+SPRITE_HORIZONTAL_SPEED,px->Math.min(WIDTH-SPRITE_WIDTH, px));
break;
case LEFT:
this.horizontalMove=new BoundMove(TICK,x,x-SPRITE_HORIZONTAL_SPEED,px->Math.max(0,px));
break;
}
}
}
public void start() {
lastTime=System.currentTimeMillis();
}
public void doMoves(long globalTime) {
long dtime = globalTime-lastTime;
lastTime = globalTime;
if ( horizontalMove!=null ) {
x=horizontalMove.doMove(dtime);
if (horizontalMove.isFinished() ) {
horizontalMove=horizontalMove.next();
}
}
if ( jumpMove!=null ) {
y=jumpMove.doMove(dtime);
if (jumpMove.isFinished() ) {
jumpMove=jumpMove.next();
}
}
}
public double getX() {
return x;
}
public void render(Graphics2D graphics) {
graphics.setColor(Color.BLACK);
graphics.fillOval((int)x, (int)y, SPRITE_WIDTH, SPRITE_HEIGHT);
}
public void collisions() {
}
}
public static interface Move { // timing framework simplifié
double doMove(long dtime);
default Move next() {
return null;
}
boolean isFinished();
}
public static class SimpleMove implements Move { // timing framework simplifié
private volatile double lastPos;
private double end;
private volatile long lastTime;
private long endTime;
private volatile boolean finished;
public SimpleMove(long time, double start, double end) {
this.lastPos=start;
this.end=end;
this.lastTime=System.currentTimeMillis();
this.endTime=lastTime+time;
}
public double doMove(long dtime) {
if ( !finished ) {
if (dtime>0) {
lastPos+=(end-lastPos)/dtime;
}
lastTime+=dtime;
if( lastTime>=endTime) {
finished=true;
lastPos=end;
}
}
return lastPos;
}
public boolean isFinished() {
return finished;
}
}
public static class BoundMove extends SimpleMove { // timing framework simplifié
private Function<Double,Double> boundFunction;
private double start;
private double end;
private long time;
public BoundMove(long time, double start, double end, Function<Double,Double> boundFunction) {
super(time,start,end);
this.time=time;
this.start=end;
this.end=end+end-start;
this.boundFunction=boundFunction;
}
public Move next() {
return new BoundMove(time, start, end, boundFunction);
}
public double doMove(long dtime) {
return boundFunction.apply(super.doMove(dtime));
}
}
// implémentation simple du saut : on peut faire faire plus réaliste (parabolique)
public static class JumpMove extends SimpleMove {
private JumpMove jumpDown;
public JumpMove(long time, double start, double end) {
this(time, start, end, true);
}
private JumpMove(long time, double start, double end, boolean up) {
super(time, start, end);
this.jumpDown=up?new JumpMove(time, end, start, false):null;
}
@Override
public Move next() {
return jumpDown;
}
}
public static JFrame showInFrame(String title, JComponent component) {
JFrame frame = new JFrame(title);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(component);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
return frame;
}
public static void renderLoop(JFrame frame, DemoTimingMove panel, Model model) {
frame.createBufferStrategy(2);
BufferStrategy strategy = frame.getBufferStrategy();
AtomicBoolean done = new AtomicBoolean(true);
frame.addWindowListener(new WindowAdapter() {
@Override
public void windowClosed(WindowEvent e) {
done.set(false);
}
});
while (!done.get()) {
do {
do {
final Graphics2D graphics = (Graphics2D)strategy.getDrawGraphics();
try {
graphics.setColor(panel.getBackground());
graphics.fillRect(0,0,panel.getWidth(),panel.getHeight());
model.render(graphics);
}
finally {
graphics.dispose();
}
} while (strategy.contentsRestored());
strategy.show();
} while (strategy.contentsLost());
}
}
} |
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