让圆圈在消失之前改变颜色 [英] make circles change color before they disappear
本文介绍了让圆圈在消失之前改变颜色的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在制作一个游戏，你跳到岩石上，如果你跳到被水覆盖的岩石上，你就输了.我让岩石消失了，但现在我想在岩石消失时发出某种警告".我以为我可以做这样的事情:
I'm making a game where you jump on rocks and if you jump on the rock which is covered by water, you lose. I made rocks disappear but now I'm want to make some kind of "warning" when the rock will disappear. I thought I could make something like this:
if(now >= currentTime[ i ] + 1500) {
//set color to ex. green
//fill oval
}
你能帮我实现吗?提前致谢！
Could you help me achieve that? Thanks in advance!
这是我的代码:
package com.pitcher654.main;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.KeyListener;
import java.awt.image.BufferStrategy;
import java.util.Random;
import com.pitcher654.main.Game.STATE;
public class Game extends Canvas implements Runnable{
private static final long serialVersionUID = -7800496711589684767L;
public static final int WIDTH = 640, HEIGHT = WIDTH / 12 * 9;
private Thread thread;
private boolean running = false;
private static final int NUM_STONES = 5;
private boolean[] visible = new boolean[NUM_STONES];
private long[] changeTimes = new long[NUM_STONES];
private Random r;
private Handler handler;
//private HUD hud;
private Menu menu;
public enum STATE {
Menu,
Help,
Game
};
public STATE gameState = STATE.Menu;
public Game() {
handler = new Handler();
menu = new Menu(this, handler);
this.addKeyListener(new KeyInput(handler));
this.addMouseListener(menu);
new Window(WIDTH, HEIGHT, "My game", this);
//hud = new HUD();
r = new Random();
//if(gameState == STATE.Game) {
//handler.addObject(new Player(100, 200, ID.Player));
for(int i=0; i<NUM_STONES; i++){
visible[i] = true; // each stone will be visible
changeTimes[i] = System.currentTimeMillis() + r.nextInt(10000) + 3000; // every stone will disappear in less than 10 seconds
//}
}
//handler.addObject(new Player(100, 200, ID.Player));
//handler.addObject(new BasicEnemy(100, 200, ID.BasicEnemy));
}
public synchronized void start() {
thread = new Thread(this);
thread.start();
running = true;
}
public synchronized void stop() {
try {
thread.join();
running = false;
}catch(Exception ex) { ex.printStackTrace(); }
}
public void run()
{
this.requestFocus();
long lastTime = System.nanoTime();
double amountOfTicks = 60.0;
double ns = 1000000000 / amountOfTicks;
double delta = 0;
long timer = System.currentTimeMillis();
int frames = 0;
while(running)
{
long now = System.nanoTime();
delta += (now - lastTime) / ns;
lastTime = now;
while(delta >=1)
{
tick();
delta--;
}
if(running)
render();
frames++;
if(System.currentTimeMillis() - timer > 1000)
{
timer += 1000;
//System.out.println("FPS: "+ frames);
frames = 0;
}
}
stop();
}
private void tick() {
handler.tick();
//hud.tick();
if(gameState == STATE.Game) {
Random r = new Random();
long now = System.currentTimeMillis();
int b = 0;
//System.out.println(now);
long extraSeconds = 500;
for(int i=0; i<NUM_STONES; i++){
for(int j = 0; j < NUM_STONES; j++) {
if(visible[ i ]) b++;
}
//if(b < 2) continue;
if(now > changeTimes[i]){ // if the time has come
if(visible[i]) {
changeTimes[i] = now + extraSeconds + r.nextInt(5000);
if(b < 2) {;
visible[ i ] = !visible[ i ];
changeTimes[ i ] += 5000;
}
}// every stone will be invisible up to five seconds
else {
changeTimes[i] = now + extraSeconds + r.nextInt(10000); // every stone will be visible again up to 10 seconds
}
visible[i] = !visible[i];
//System.out.println(visible[ i ]);// switch the visibility state
}else if (now > changeTimes[ i ]) {
System.out.println("Usli u zeleno");
}
b = 0;
}
}else if(gameState == STATE.Menu) {
menu.tick();
}
}
private void render() {
BufferStrategy bs = this.getBufferStrategy();
if(bs == null) {
this.createBufferStrategy(3);
return;
}
Graphics g = bs.getDrawGraphics();
long now = System.currentTimeMillis();
g.setColor(new Color(87, 124, 212));
g.fillRect(0, 0, WIDTH, HEIGHT);
if(gameState == STATE.Game) {
g.setColor(new Color(209, 155, 29));
for(int i = 0; i < 5; i++) {
g.fillOval(80 + (100 * i), 325, 70, 20);
}
if(gameState == STATE.Game) {
for(int i = 0; i < NUM_STONES; i++) {
if(visible[i]) g.setColor(new Color(209, 155, 29));
else g.setColor(new Color(107, 155, 170));
g.fillOval(80 + (100 * i), 325, 70, 20);
}
}
}else if(gameState == STATE.Menu || gameState == STATE.Help){
menu.render(g);
}
handler.render(g);
if(gameState == STATE.Game) {
}
//hud.render(g);
g.dispose();
bs.show();
}
public static int clamp(int var, int min, int max) {
if(var >= max)
return var = max;
else if(var <= max)
return var = min;
else
return var;
}
public static void main(String[] args) {
new Game();
}
}
推荐答案
类似于我在上面留下的关于使用 Swing 计时器和 EDT 进行所有渲染的评论，您可以使用 javax.swing.Timer 来闪烁您的岩石并制作它们消失了，就像
Similar to the comment I left above regarding using the Swing timer and the EDT for all rendering, you can use javax.swing.Timer to flash your rocks and make them disappear, like
long stoneWarningTime = ...;
long stoneDisappearTime = stoneWarningTime + ...;
ActionListener taskPerformer = new ActionListener() {
public void actionPerformed(ActionEvent evt) {
//...Perform a task...
}
};
new Timer(stoneWarningTime, taskPerformer).start();
这篇关于让圆圈在消失之前改变颜色的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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