我正在制作吃 bean 人，但在框架上绘制图形时遇到问题，当我绘制点图像时，它看起来像蛇游戏，我尝试将我的背景和字符绘制方法都放在渲染中方法，但比我的点图像闪烁
它现在的样子，随意忽略那张随机的脸，这是一个内部笑话。
此外，这是我的第一款游戏，所以任何关于结构的提示、关于我做对的事情(如果有的话)和我做错的事情的指示，以及一般提示都会非常有帮助!
另外我知道我有几个未使用的方法
代码:
package game;
import graphics.map;
import java.awt.BorderLayout;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JButton;
import javax.swing.JFrame;
public class main extends Canvas implements Runnable{
private static final long serialVersionUID = 1L; //not sure why it wanted me to do this, maybe ask bender, or just google it later
public static boolean running = false;
public static int HEIGHT = 800;
public static int WIDTH = 600;
public static int posX = 50;
public static int posY = 50;
public static final String name = "Pac Man Alpha 1.4";
private static final double speed = 1.2;
public input input;
static BufferedImage background = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);;
static BufferedImage pacman = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);;
static BufferedImage settingsBackground = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);;
static BufferedImage level1 = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);;
static BufferedImage level2 = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);;
static BufferedImage points = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);;
static BufferedImage point = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);;
static JFrame frame;
private input keypress = new input();
private map map;
private static boolean charLoaded = false;
public static boolean MAIN_MENU = true;
public static boolean GAME = false;
public static boolean level1test = true;
public static boolean level2test = false;
public static boolean level3test = false;
public static boolean level4test = false;
static boolean drawn = false;
public static boolean key_down;
public static boolean key_up;
public static boolean key_right;
public static boolean key_left;
//private Screen screen;
JButton startButton = new JButton("Start"); //Start
JButton settingsButton = new JButton("Settings"); //Settings
JButton exitButton = new JButton("Exit"); //Exit
public main()
{
setMinimumSize(new Dimension(WIDTH , HEIGHT ));
setMaximumSize(new Dimension(WIDTH , HEIGHT )); // keeps the canvas same size
setPreferredSize(new Dimension(WIDTH, HEIGHT));
frame = new JFrame(name);
if(MAIN_MENU == true && GAME == false){
buttons(frame.getContentPane());
}
frame.setLayout(new BorderLayout());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // ends program on
// close
frame.addKeyListener(new input() );
frame.add(this, BorderLayout.CENTER);
frame.pack(); // keeps size correct
frame.setResizable(false);
frame.setVisible(true);
this.addKeyListener(keypress);
}
public static void main(String[] args)
{
try {
background = ImageIO.read(new File("res\\Background.png"));
pacman = ImageIO.read(new File("res\\pacmansprites.png"));
settingsBackground = ImageIO.read(new File("res\\Background.png"));
level1 = ImageIO.read(new File("res\\level1.png"));
//level2 = ImageIO.read(new File("res\\level2.png"));
point = ImageIO.read(new File("res\\Points for pacman.png"));
} catch (IOException e) {
}
running = true;
new main().start();
}
public void run()
{
long lastTime = System.nanoTime();
double nsPerTick = 1000000000 / 60D;
long lastTimer = System.currentTimeMillis();
double delta = 0;
int frames = 0;
int ticks = 0;
while (running == true) {
long now = System.nanoTime();
delta += (now - lastTime) / nsPerTick;
lastTime = now;
boolean render = false;
while (delta >= 1) {
ticks++;
tick();
delta -= 1;
render = true;
}
try {
Thread.sleep(3); //keep the Frames from going to high
} catch (InterruptedException e) {
e.printStackTrace();
}
if(render == true){
frames++;
render();
}
if (System.currentTimeMillis() - lastTimer >= 1000) {
lastTimer +=1000;
//System.out.println("Frames: " + frames + " Ticks: " + ticks);
frames = 0;
ticks = 0;
}
}
}
public synchronized void start()
{
new Thread(this).start();
run();
}
public synchronized void stop()
{
running = false;
}
public void tick()
{
if (key_up) posY -= speed / 2;
if (key_down) posY += speed;
if (key_left) posX -= speed / 2;
if (key_right) posX += speed;
}
public void render()
{
drawn = false;
if(MAIN_MENU == false && GAME == true)
{
drawMap();
drawChar();
}
else if(MAIN_MENU == false && GAME == false) {
Graphics g = getGraphics();
{
g.drawImage(settingsBackground,0,0,getWidth(),getHeight(),null);
g.dispose();
}
} else {
Graphics g = getGraphics();{
g.drawImage(background,0,0,getWidth(), getHeight(),null);
g.dispose(); //kill it
}
}
}
public void drawMap(){
if(level1test == true){
Graphics g = getGraphics();
{
g.drawImage(level1,0,0,getWidth(),getHeight(),null);
g.dispose();
}
}
if(level2test == true && drawn == false){
Graphics g = getGraphics();
{
g.drawImage(level2,0,0,getWidth(),getHeight(),null);
}
g.dispose();
}
drawn = true;
}
public void drawChar(){
//drawMap();
Graphics g = getGraphics();{
g.drawImage(point,posX,posY,20, 20,null);
g.dispose();
revalidate();
}
}
public void begin() {
if (key_up) System.out.println("up");
if (key_down) System.out.println("down");
if (key_left) System.out.println("left");
if (key_right) System.out.println("right");
}
public void loadMap(){
if(!drawn && level1test){
}else if(!drawn && level2test){
//draw 2nd map here
}else if(!drawn && level3test){
//draw 3rd map here
}
}
public void buttons(Container pane)
{
pane.setLayout(null);
startButton.addActionListener( new ActionListener() {
public void actionPerformed(ActionEvent ae) {
MAIN_MENU = false;
GAME = true;
frame.remove(startButton);
frame.remove(settingsButton);
frame.remove(exitButton);
frame.revalidate();
drawMap();
System.out.println("Start Button Clicked");
}
} );
settingsButton.addActionListener( new ActionListener() {
public void actionPerformed(ActionEvent ae) {
MAIN_MENU = false;
GAME = false;
frame.remove(startButton);
frame.remove(settingsButton);
frame.remove(exitButton);
frame.revalidate();
frame.repaint();
System.out.println("Settings Button Clicked");
}
} );
exitButton.addActionListener( new ActionListener() {
public void actionPerformed(ActionEvent ae) {
System.out.println("Exit Button Clicked");
System.exit(0);
}
} );
pane.add(startButton);
pane.add(settingsButton);
pane.add(exitButton);
Insets insets = pane.getInsets();
Dimension size = startButton.getPreferredSize();
startButton.setBackground(new Color(0, 0, 0));
startButton.setForeground(Color.CYAN);
startButton.setFocusPainted(false);
startButton.setFont(new Font("Calabri", Font.BOLD, 16));
settingsButton.setBackground(new Color(0, 0, 0));
settingsButton.setForeground(Color.RED);
settingsButton.setFocusPainted(false);
settingsButton.setFont(new Font("Calabri", Font.BOLD, 16));
exitButton.setBackground(new Color(0, 0, 0));
exitButton.setForeground(Color.YELLOW);
exitButton.setFocusPainted(false);
exitButton.setFont(new Font("Calabri", Font.BOLD, 16));
startButton.setBounds((WIDTH - 125) + insets.left, 10 + insets.top,
size.width + 50, size.height + 10);
settingsButton.setBounds((WIDTH - 125) + insets.left, 55 + insets.top,
size.width + 50, size.height + 10);
exitButton.setBounds((WIDTH - 125) + insets.left, 100 + insets.top,
size.width + 50, size.height + 10);
}
}
最佳答案
getGraphics不是定制绘画的完成方式。在您的情况下，您应该覆盖 paint方法，并确保调用 super.paint在进行任何自定义绘画之前。
getGraphics返回 Graphics最后用于绘制组件的上下文，可以在下一个绘制周期中丢弃，为 null 或不再被组件使用
请记住，绘画使用“画家 Canvas ”方法，也就是说，就像在物理 Canvas 上绘画一样，当您在其中绘画时，您会在之前的内容上绘画，但不会删除它。
现在，如果您覆盖 paint ，你会发现你会有闪烁的问题。这是因为 Canvas
不是双缓冲
要解决这个问题，您应该考虑用户 a BufferStrategy ，它不仅允许您生成多个要绘制的缓冲区，还可以控制绘制过程本身
只是不要忘记在绘制之前清除每个缓冲区...
关于Java - 吃 bean 人 - GUI - 绘图问题，以及给有抱负的程序员的一般提示，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/26266284/