我制作了一个SnakeGame并在其基础上工作，但我开始用图像来纹理我的蛇。我想让纹理在蛇改变方向的时候也改变方向。它是工作的，我的问题是，每次蛇改变方向的所有蛇的身体部位改变方向在同一时间，导致纹理bug，我怎么能改变纹理下一个身体部位每一个计时器滴答?还有，我如何编辑纹理的最后一个bodyPart只为尾巴
下面的代码只是来自重要类gamepanel的代码纹理代码在方法draw(Graphics g)
中谢谢你的帮助，我找不到任何解决办法。
package game;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.Random;
public class gamepanel extends JPanel implements ActionListener {
/**
*
*/
private static final long serialVersionUID = 42L;
static final int SCREEN_WIDTH = 600;
static final int SCREEN_HEIGHT = 600;
static final int UNIT_SIZE = 25;
static final int GAME_UNITS = (SCREEN_WIDTH*SCREEN_HEIGHT)/UNIT_SIZE;
int DELAY = 100;
final int x[] = new int[GAME_UNITS];
final int y[] = new int[GAME_UNITS];
int bodyParts = 6;
String str = String.valueOf(bodyParts);
int applesEaten;
int appleX;
int appleY;
char direction = 'R';
boolean running = false;
Timer timer;
Random random;
Image apple = new ImageIcon(this.getClass().getResource("/images/redapple.png")).getImage();
Image headup = new ImageIcon(this.getClass().getResource("/images/headup.png")).getImage();
Image headr = new ImageIcon(this.getClass().getResource("/images/headr.png")).getImage();
Image headl = new ImageIcon(this.getClass().getResource("/images/headl.png")).getImage();
Image headd = new ImageIcon(this.getClass().getResource("/images/headd.png")).getImage();
Image bodyup = new ImageIcon(this.getClass().getResource("/images/bodyup.png")).getImage();
Image bodyd = new ImageIcon(this.getClass().getResource("/images/bodyd.png")).getImage();
Image bodyr = new ImageIcon(this.getClass().getResource("/images/bodyr.png")).getImage();
Image bodyl = new ImageIcon(this.getClass().getResource("/images/bodyl.png")).getImage();
gamepanel(){
random = new Random();
this.setPreferredSize(new Dimension(SCREEN_WIDTH,SCREEN_HEIGHT));
this.setBackground(new Color(33, 33, 33));
this.setFocusable(true);
this.addKeyListener(new MyKeyAdapter());
startGame();
}
public void startGame() {
newApple();
running = true;
timer = new Timer(DELAY,this);
timer.start();
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
draw(g);
}
public void draw(Graphics g) {
if(running) {
/* for(int i=0;i<SCREEN_HEIGHT/UNIT_SIZE;i++) {
g.drawLine(i*UNIT_SIZE, 0, i*UNIT_SIZE, SCREEN_HEIGHT);
g.drawLine(0, i*UNIT_SIZE, SCREEN_WIDTH, i*UNIT_SIZE);
} */
//g.setColor(new Color(73, 235, 116));
//g.fillOval(appleX,appleY, UNIT_SIZE, UNIT_SIZE);
g.drawImage(apple, appleX,appleY, UNIT_SIZE, UNIT_SIZE, null, null);
for(int i = 0;i< bodyParts; i++) {
//HEAD TEXTURE
if(i==0 && direction=='U') {
g.drawImage(headup,x[i],y[i],UNIT_SIZE, UNIT_SIZE,null);
} else if(i==0 && direction=='R') {
g.drawImage(headr,x[i],y[i],UNIT_SIZE, UNIT_SIZE,null);
} else if(i==0 && direction=='L') {
g.drawImage(headl,x[i],y[i],UNIT_SIZE, UNIT_SIZE,null);
} else if(i==0 && direction=='D') {
g.drawImage(headd,x[i],y[i],UNIT_SIZE, UNIT_SIZE,null);
//BODY TEXTURE
} else if(i!=0 && direction=='U') {
g.drawImage(bodyup,x[i],y[i],UNIT_SIZE, UNIT_SIZE,null);
} else if(i!=0 && direction=='R') {
g.drawImage(bodyr,x[i],y[i],UNIT_SIZE, UNIT_SIZE,null);
} else if(i!=0 && direction=='L') {
g.drawImage(bodyl,x[i],y[i],UNIT_SIZE, UNIT_SIZE,null);
} else if(i!=0 && direction=='D') {
g.drawImage(bodyd,x[i],y[i],UNIT_SIZE, UNIT_SIZE,null);
}
}
g.setColor(Color.red);
g.setFont(new Font("Arial",Font.BOLD,40));
FontMetrics metrics = getFontMetrics(g.getFont());
g.drawString("Score: "+applesEaten, (SCREEN_WIDTH - metrics.stringWidth("Score: "+applesEaten))/2, g.getFont().getSize());
}else {
gameOver(g);
}
}
public void newApple() {
appleX = random.nextInt((int)(SCREEN_WIDTH/UNIT_SIZE))*UNIT_SIZE;
appleY = random.nextInt((int)(SCREEN_HEIGHT/UNIT_SIZE))*UNIT_SIZE;
}
public void move() {
for(int i = bodyParts;i>0;i--) {
x[i] = x[i-1];
y[i] = y[i-1];
}
switch(direction) {
case 'U' :
y[0] = y[0] - UNIT_SIZE;
break;
case 'D' :
y[0] = y[0] + UNIT_SIZE;
break;
case 'L' :
x[0] = x[0] - UNIT_SIZE;
break;
case 'R' :
x[0] = x[0] + UNIT_SIZE;
break;
}
}
public void checkApple() {
int i = bodyParts;
if((x[i] == appleX) && (y[i] == appleY)) {
newApple();
} else if((x[0] == appleX) && (y[0] == appleY)) {
bodyParts++;
applesEaten++;
DELAY--;
newApple();
}
}
public void checkCollisions() {
//checks if head collides with body
for(int i = bodyParts; i>0;i--) {
if ((x[0]==x[i]) && (y[0]==y[i])) {
running = false;
}
}
// checks if head touches left border
if(x[0] < 0) {
running = false;
}
// check right border collide
if(x[0] > SCREEN_WIDTH) {
running = false;
}
// check top border
if(y[0] < 0) {
running = false;
}
//checkk bottom border
if(y[0] > SCREEN_HEIGHT) {
running = false;
}
if(!running) {
timer.stop();
}
}
public void gameOver(Graphics g) {
//SCORE
g.setColor(Color.red);
g.setFont(new Font("Arial",Font.BOLD,40));
FontMetrics metrics1 = getFontMetrics(g.getFont());
g.drawString("Your Score: "+applesEaten, (SCREEN_WIDTH - metrics1.stringWidth("Your Score: "+applesEaten))/2, g.getFont().getSize());
//GAme Over Text
g.setColor(Color.red);
g.setFont(new Font("Arial",Font.BOLD,75));
FontMetrics metrics2 = getFontMetrics(g.getFont());
g.drawString("Game Over", (SCREEN_WIDTH - metrics2.stringWidth("Game Over"))/2, SCREEN_HEIGHT/2);
}
@Override
public void actionPerformed(ActionEvent e) {
if(running) {
move();
checkApple();
checkCollisions();
}
repaint();
}
public class MyKeyAdapter extends KeyAdapter{
@Override
public void keyPressed(KeyEvent e) {
switch(e.getKeyCode()) {
case KeyEvent.VK_LEFT:
if(direction != 'R') {
direction = 'L';
}
break;
case KeyEvent.VK_RIGHT:
if(direction != 'L') {
direction = 'R';
}
break;
case KeyEvent.VK_UP:
if(direction != 'D') {
direction = 'U';
}
break;
case KeyEvent.VK_DOWN:
if(direction != 'U') {
direction = 'D';
}
break;
}
}
}
}
也许可以尝试每帧从头部开始更新每个身体部位的纹理?就像0 =头部，将首先更新，1是下一个身体部分，因此将在下一帧中更新，当蛇移动了一个单位，因此排队计时