這是我的代碼，我使用了兩張圖片，一張用于背景圖片，一張用于彈球動畫，但是使用這段代碼，球會在它的飛行軌跡中擦掉背景圖片，所以我需要一些幫助，讓我可以在transparent bufferedimage 然后將其作為背景圖像的遮罩。提前致謝。import java.awt.Color;import java.awt.Dimension;import java.awt.Graphics;import java.awt.Image;import java.awt.event.ActionListener;import java.awt.image.BufferedImage;import java.util.Random;import javax.swing.ImageIcon;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.Timer;public class MainTest { private final int TABLE_WIDTH = 300; private final int TABLE_HEIGHT = 400; private final int BALL_SIZE = 16; private JFrame f = new JFrame("Pinball game"); Random rand = new Random(); private int ySpeed = 5; private double xyRate = rand.nextDouble() - 0.5; private int xSpeed = (int) (ySpeed * xyRate * 2); private int ballX = rand.nextInt(200) + 20; private int ballY = rand.nextInt(10) + 20; private BackgroundPanel background = new BackgroundPanel(); private Foreground foreground = new Foreground(); private int preX = -1; private int preY = -1; BufferedImage image = new BufferedImage(TABLE_WIDTH, TABLE_HEIGHT, BufferedImage.TYPE_INT_ARGB); Image back = new ImageIcon("res/cat1.jpg").getImage(); Graphics g = image.getGraphics(); Timer timer; public void init() {// Graphics2D g = image.createGraphics();// image = g.getDeviceConfiguration().createCompatibleImage(30, 30, Transparency.TRANSLUCENT); background.setBackground(new ImageIcon("res/cat1.jpg")); background.setPreferredSize(new Dimension(TABLE_WIDTH, TABLE_HEIGHT)); foreground.setPreferredSize(new Dimension(TABLE_WIDTH, TABLE_HEIGHT)); background.add(foreground); f.add(background); ActionListener taskPerformer = evt -> { if (ballX <= 0 || ballX >= TABLE_WIDTH - BALL_SIZE) { xSpeed = -xSpeed; } else if (ballY <= 0 || (ballY >= TABLE_HEIGHT - BALL_SIZE)) { ySpeed = -ySpeed; }
2 回答
慕運維8079593
TA貢獻1876條經驗 獲得超5個贊
我解決了這個問題，并在此處發布了代碼
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.util.Random;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;
public class MainTest {
? ? private final int TABLE_WIDTH = 300;
? ? private final int TABLE_HEIGHT = 400;
? ? private final int BALL_SIZE = 16;
? ? private JFrame f = new JFrame("Pinball game");
? ? Random rand = new Random();
? ? private int ySpeed = 5;
? ? private double xyRate = rand.nextDouble() - 0.5;
? ? private int xSpeed = (int) (ySpeed * xyRate * 2);
? ? private int ballX = rand.nextInt(200) + 20;
? ? private int ballY = rand.nextInt(10) + 20;
? ? private BackgroundPanel background = new BackgroundPanel();? ?
? ? Timer timer;
? ? public void init() {
? ? ? ? background.setBackground(new ImageIcon("res/cat1.jpg"));
? ? ? ? background.setPreferredSize(new Dimension(TABLE_WIDTH, TABLE_HEIGHT));
? ? ? ? f.add(background);
? ? ? ? ActionListener taskPerformer = evt -> {
? ? ? ? ? ? if (ballX <= 0 || ballX >= TABLE_WIDTH - BALL_SIZE) {
? ? ? ? ? ? ? ? xSpeed = -xSpeed;
? ? ? ? ? ? } else if (ballY <= 0 || (ballY >= TABLE_HEIGHT - BALL_SIZE)) {
? ? ? ? ? ? ? ? ySpeed = -ySpeed;
? ? ? ? ? ? }
? ? ? ? ? ? ballY += ySpeed;
? ? ? ? ? ? ballX += xSpeed;
? ? ? ? ? ? background.repaint();
? ? ? ? };
? ? ? ? timer = new Timer(10, taskPerformer);
? ? ? ? timer.start();
? ? ? ? f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
? ? ? ? f.pack();
? ? ? ? f.setVisible(true);
? ? }
? ? public static void main(String[] args) {
? ? ? ? new MainTest().init();
? ? }
? ? public class BackgroundPanel extends JPanel {
? ? ? ? private static final long serialVersionUID = 6702278957072713279L;
? ? ? ? private Icon wallpaper;
? ? ? ? public BackgroundPanel() {
? ? ? ? }
? ? ? ? protected void paintComponent(Graphics g) {
? ? ? ? ? ? if (null != wallpaper) {
? ? ? ? ? ? ? ? processBackground(g);
? ? ? ? ? ? ? ? drawball(g);
? ? ? ? ? ? }
? ? ? ? ? ? System.out.println("f:paintComponent(Graphics g)");
? ? ? ? }
? ? ? ? public void setBackground(Icon wallpaper) {
? ? ? ? ? ? this.wallpaper = wallpaper;
? ? ? ? ? ? this.repaint();
? ? ? ? }
? ? ? ? private void processBackground(Graphics g) {
? ? ? ? ? ? ImageIcon icon = (ImageIcon) wallpaper;
? ? ? ? ? ? Image image = icon.getImage();
? ? ? ? ? ? int cw = getWidth();
? ? ? ? ? ? int ch = getHeight();
? ? ? ? ? ? int iw = image.getWidth(this);
? ? ? ? ? ? int ih = image.getHeight(this);
? ? ? ? ? ? int x = 0;
? ? ? ? ? ? int y = 0;
? ? ? ? ? ? while (y <= ch) {
? ? ? ? ? ? ? ? g.drawImage(image, x, y, this);
? ? ? ? ? ? ? ? x += iw;
? ? ? ? ? ? ? ? if (x >= cw) {
? ? ? ? ? ? ? ? ? ? x = 0;
? ? ? ? ? ? ? ? ? ? y += ih;
? ? ? ? ? ? ? ? }
? ? ? ? ? ? }
? ? ? ? }
? ? ? ? private void drawball(Graphics g){
? ? ? ? ? ? ?g.setColor(Color.BLUE);
? ? ? ? ? ? ?g.fillOval(ballX, ballY, BALL_SIZE, BALL_SIZE);
? ? ? ? }
? ? }
}
添加回答
舉報
0/150
提交
取消