我正在扩展 Canvas
并将其添加到 JFrame
.我知道 AWT 和 Swing 不应该混合使用,并且首选在 JPanel 上绘图,但我正在尝试遵循游戏引擎教程,并且我想坚持下去,因为到目前为止我已经开始工作了。 Canvas
有minimumSize
, maximumSize
, 和 prefferedSize
设置为 550, 400
的尺寸.当我进行绘制调用时 graphics.draw(0,0,550,400)
它没有像它应该的那样填满整个屏幕。我将绘图调用更改为 graphics.draw(0,0,560,410)
基本上向它添加 10px 并且它填满了整个屏幕。怎么了?
顺便说一句:graphics.draw(10,10,550,400
恰好从角开始绘制矩形,所以我认为 JFrame 不是问题所在。
里面主要调用Launcher
类
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
game.setMinimumSize(DIMENSIONS);
game.setMaximumSize(DIMENSIONS);
game.setPreferredSize(DIMENSIONS);
game.frame = new JFrame(NAME);
game.frame.setLayout(new BorderLayout());
game.frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
game.frame.add(game, BorderLayout.CENTER);
game.frame.pack();
game.frame.setResizable(false);
game.frame.setLocationRelativeTo(null);
game.frame.setVisible(true);
Logger.log(TAG, "Game starting");
game.start();
}
});
}
绘图调用,Launcher.HEIGHT
和 WIDTH
是550,400
public void draw(float deltaTime, Graphics2D graphics) {
graphics.setColor(Color.BLACK);
graphics.fillRect(0, 0, 550, 400);
graphics.setColor(Color.DARK_GRAY);
graphics.fillRect(0, 0, 150, 40);
graphics.fillRect(0, Launcher.HEIGHT - 100, Launcher.WIDTH, 100);
graphics.setColor(Color.LIGHT_GRAY);
graphics.fillRect(125, Launcher.HEIGHT - 100, 100, 350);
}
扩展Canvas
类
public abstract class Game extends Canvas implements Runnable {
private static final String TAG = "Game";
public JFrame frame;
public JPanel panel;
public boolean isApplet = false;
private boolean gameRunning = false;
BufferStrategy bufferStrategy;
private Screen screen;
private Thread renderThread;
public synchronized void start() {
// Canvas
setBounds(0, 0, 550, 400);
setIgnoreRepaint(true);
createBufferStrategy(2);
bufferStrategy = getBufferStrategy();
// Screen, Handlers, ETC
screen = getStartScreen();
// Threads
renderThread = new Thread(this, Launcher.NAME + "_main");
renderThread.start();
gameRunning = true;
}
@Override
public void run() {
long startTime = System.nanoTime();
while (gameRunning) {
float deltaTime = (System.nanoTime() - startTime) / 1000000000.0f;
startTime = System.nanoTime();
screen.update(deltaTime);
Graphics2D graphics = (Graphics2D) bufferStrategy.getDrawGraphics();
screen.draw(deltaTime, graphics);
graphics.dispose();
bufferStrategy.show();
// FPS Counter
// FPS Capper
}
}
}
申请SSCCE
import java.awt.BorderLayout;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.image.BufferStrategy;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
@SuppressWarnings("serial")
public class Game extends Canvas implements Runnable {
public static final int WIDTH = 550;
public static final int HEIGHT = 400;
public static final Dimension DIMENSIONS = new Dimension(WIDTH, HEIGHT);
public static final String NAME = "SSCCE";
public boolean gameRunning = false;
public JFrame frame;
public BufferStrategy bufferStrategy;
public static void main (String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
Game game = new Game();
game.setMinimumSize(DIMENSIONS);
game.setMaximumSize(DIMENSIONS);
game.setPreferredSize(DIMENSIONS);
game.frame = new JFrame(NAME);
game.frame.setLayout(new BorderLayout());
game.frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
game.frame.add(game, BorderLayout.CENTER);
game.frame.pack();
game.frame.setResizable(false);
game.frame.setLocationRelativeTo(null);
game.frame.setVisible(true);
System.out.println("Game started");
game.start();
}
});
}
public synchronized void start() {
setSize(550, 400);
setBounds(0, 0, 550, 400);
setIgnoreRepaint(true);
createBufferStrategy(2);
bufferStrategy = getBufferStrategy();
// Threads
Thread renderThread = new Thread(this, NAME + "_main");
renderThread.start();
gameRunning = true;
}
@Override
public void run() {
while (gameRunning) {
Graphics2D graphics = (Graphics2D) bufferStrategy.getDrawGraphics();
graphics.setColor(Color.BLACK);
graphics.fillRect(0, 0, WIDTH, HEIGHT);
graphics.dispose();
bufferStrategy.show();
}
}
}
至于我关注的Java 2D游戏教程是一个网络系列。不过,链接如下click here .我修改了很多代码。
为 MadProgrammer 修改
import java.awt.BorderLayout;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.image.BufferStrategy;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
@SuppressWarnings("serial")
public class Game extends Canvas implements Runnable {
public static final int WIDTH = 550;
public static final int HEIGHT = 400;
public static final Dimension DIMENSIONS = new Dimension(WIDTH, HEIGHT);
public static final String NAME = "SSCCE";
public boolean gameRunning = false;
public JFrame frame;
public BufferStrategy bufferStrategy;
public static void main (String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
Game game = new Game();
game.setMinimumSize(DIMENSIONS);
game.setMaximumSize(DIMENSIONS);
game.setPreferredSize(DIMENSIONS);
game.frame = new JFrame(NAME);
game.frame.setLayout(new BorderLayout());
game.frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
game.frame.add(game, BorderLayout.CENTER);
game.frame.pack();
game.frame.setResizable(false);
game.frame.setLocationRelativeTo(null);
game.frame.setVisible(true);
System.out.println("Game started");
game.start();
}
});
}
public synchronized void start() {
setSize(550, 400);
setBounds(0, 0, 550, 400);
setIgnoreRepaint(true);
createBufferStrategy(2);
bufferStrategy = getBufferStrategy();
// Threads
Thread renderThread = new Thread(this, NAME + "_main");
renderThread.start();
gameRunning = true;
}
@Override
public void run() {
while (gameRunning) {
Graphics2D graphics = (Graphics2D) bufferStrategy.getDrawGraphics();
graphics.setColor(Color.RED);
// Using getWidth()
graphics.fillRect(0, 0, getWidth(), getHeight());
graphics.setColor(Color.GREEN);
// Using WIDTH which was used to set the size of the canvas
graphics.fillRect(5, 5, WIDTH, HEIGHT);
graphics.dispose();
bufferStrategy.show();
try {
Thread.sleep(60);
} catch (InterruptedException ex) {
}
}
}
}
最佳答案
您提供的示例运行良好。我对其进行了一些修改以演示 getWidth/height
public void run() {
while (gameRunning) {
Graphics2D graphics = (Graphics2D) bufferStrategy.getDrawGraphics();
graphics.setColor(Color.RED);
graphics.fillRect(0, 0, getWidth(), getHeight());
graphics.setColor(Color.GREEN);
int width = getWidth() - 50;
int height = getHeight() - 50;
graphics.fillRect(25, 25, width, height);
graphics.setColor(Color.BLACK);
FontMetrics fm = graphics.getFontMetrics();
graphics.drawString("Frame Size: " + frame.getWidth() + "x" + frame.getHeight(), 0, fm.getAscent());
graphics.drawString("Canvas Size: " + getWidth() + "x" + getHeight(), 0, fm.getAscent() + fm.getHeight());
graphics.dispose();
bufferStrategy.show();
try {
Thread.sleep(60);
} catch (InterruptedException ex) {
}
}
}
关于java - Canvas fillRect() 未填充定义的 Canvas ,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/14702969/