帆布fillRect（）不灌装定义画布 [英] Canvas fillRect() not filling defined canvas
本文介绍了帆布fillRect（）不灌装定义画布的处理方法，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
我伸出的画布并将其添加到的JFrame 。据我所知，AWT和Swing不应混为一谈，并且借鉴的JPanel是preferred但我试图遵循一个游戏引擎教程，我想坚持下去，因为我得到了它迄今为止的工作。在画布的的minimumSize ， MAXIMUMSIZE 和 prefferedSize 设置为 graphics.draw（0,0,550,400）不填充整个屏幕，因为它应该。我改变了抽奖调用 graphics.draw（0,0,560,410）本质添加10px的它和它充满了整个屏幕。什么错？
BTW： graphics.draw（10,10,550,400 开始绘制在拐角处正是因此，我不认为在JFrame是问题的矩形
在启动主通话类
公共静态无效的主要（字串[] args）{
SwingUtilities.invokeLater（Runnable的新（）{
@覆盖
公共无效的run（）{
game.setMinimumSize（尺寸）;
game.setMaximumSize（尺寸）;
game.set preferredSize（尺寸）; game.frame =新的JFrame（名）;
game.frame.setLayout（新的BorderLayout（））;
game.frame.setDefaultCloseOperation（JFrame.EXIT_ON_CLOSE）; game.frame.add（游戏，BorderLayout.CENTER）;
game.frame.pack（）; game.frame.setResizable（假）;
game.frame.setLocationRelativeTo（NULL）;
game.frame.setVisible（真）; Logger.log（TAG，游戏开始）;
游戏开始（）;
}
}）;
}
绘图调用， Launcher.HEIGHT 和宽度是 550,400
公共无效战平（浮动deltaTime，Graphics2D的图形）{
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）;
}
扩展画布类
公共抽象类游戏扩展画布实现Runnable {
私有静态最后弦乐TAG =游戏;公众的JFrame框架;
公众的JPanel面板;
公共布尔isApplet = FALSE;私人布尔gameRunning = FALSE;BufferStrategy中BufferStrategy中;私人屏幕屏幕;
私人螺纹renderThread;公共同步启动无效（）{
//帆布
的setBounds（0，0，550，400）;
setIgnoreRepaint（真）;
createBufferStrategy（2）;
BufferStrategy中= getBufferStrategy（）; //屏幕，处理器，ETC
屏幕= getStartScreen（）; //线程
renderThread =新主题（这一点，Launcher.NAME +_main）;
renderThread.start（）;
gameRunning = TRUE;
}@覆盖
公共无效的run（）{
长STARTTIME = System.nanoTime（）; 而（gameRunning）{
浮动deltaTime =（System.nanoTime（） - startTime时）/ 1000000000.0f;
STARTTIME = System.nanoTime（）; screen.update（deltaTime）; Graphics2D的图形=（Graphics2D的）bufferStrategy.getDrawGraphics（）; screen.draw（deltaTime，图形）; graphics.dispose（）;
bufferStrategy.show（）; // FPS计数器 // FPS旋盖机
}
}
}
Reqested SSCCE
进口java.awt.BorderLayout中;
进口java.awt.Canvas中;
进口java.awt.Color中;
进口java.awt.Dimension中;
进口java.awt.Graphics2D中;
进口java.awt.image.BufferStrategy;进口javax.swing.JFrame中;
进口javax.swing.SwingUtilities中;@燮pressWarnings（串行）
公共类游戏扩展画布实现Runnable { 公共静态最终诠释WIDTH = 550;
公共静态最终诠释HEIGHT = 400;
公共静态最终尺寸尺寸=新的外形尺寸（宽，高）; 公共静态最后弦乐NAME =SSCCE; 公共布尔gameRunning = FALSE; 公众的JFrame框架;
公共BufferStrategy中BufferStrategy中; 公共静态无效的主要（字串[] args）{
SwingUtilities.invokeLater（Runnable的新（）{
@覆盖
公共无效的run（）{
游戏游戏=新游戏（）;
game.setMinimumSize（尺寸）;
game.setMaximumSize（尺寸）;
game.set preferredSize（尺寸）; game.frame =新的JFrame（名）;
game.frame.setLayout（新的BorderLayout（））;
game.frame.setDefaultCloseOperation（JFrame.EXIT_ON_CLOSE）; game.frame.add（游戏，BorderLayout.CENTER）;
game.frame.pack（）; game.frame.setResizable（假）;
game.frame.setLocationRelativeTo（NULL）;
game.frame.setVisible（真）; 的System.out.println（游戏开始了）;
游戏开始（）;
}
}）;
} 公共同步启动无效（）{
的setSize（550，400）;
的setBounds（0，0，550，400）;
setIgnoreRepaint（真）;
createBufferStrategy（2）;
BufferStrategy中= getBufferStrategy（）; //线程
螺纹renderThread =新主题（这一点，名称+_main）;
renderThread.start（）;
gameRunning = TRUE;
} @覆盖
公共无效的run（）{
而（gameRunning）{
Graphics2D的图形=（Graphics2D的）bufferStrategy.getDrawGraphics（）; graphics.setColor（Color.BLACK）;
graphics.fillRect（0，0，宽度，高度）; graphics.dispose（）;
bufferStrategy.show（）;
}
}}
至于在Java 2D游戏教程中，我跟随它是一个Web系列。尽管如此，链接如下点击此处。我修改了code颇多。
修改为MadProgrammer
进口java.awt.BorderLayout中;
进口java.awt.Canvas中;
进口java.awt.Color中;
进口java.awt.Dimension中;
进口java.awt.Graphics2D中;
进口java.awt.image.BufferStrategy;进口javax.swing.JFrame中;
进口javax.swing.SwingUtilities中;@燮pressWarnings（串行）
公共类游戏扩展画布实现Runnable { 公共静态最终诠释WIDTH = 550;
公共静态最终诠释HEIGHT = 400;
公共静态最终尺寸尺寸=新的外形尺寸（宽，高）; 公共静态最后弦乐NAME =SSCCE; 公共布尔gameRunning = FALSE; 公众的JFrame框架;
公共BufferStrategy中BufferStrategy中; 公共静态无效的主要（字串[] args）{
SwingUtilities.invokeLater（Runnable的新（）{
@覆盖
公共无效的run（）{
游戏游戏=新游戏（）;
game.setMinimumSize（尺寸）;
game.setMaximumSize（尺寸）;
game.set preferredSize（尺寸）; game.frame =新的JFrame（名）;
game.frame.setLayout（新的BorderLayout（））;
game.frame.setDefaultCloseOperation（JFrame.EXIT_ON_CLOSE）; game.frame.add（游戏，BorderLayout.CENTER）;
game.frame.pack（）; game.frame.setResizable（假）;
game.frame.setLocationRelativeTo（NULL）;
game.frame.setVisible（真）; 的System.out.println（游戏开始了）;
游戏开始（）;
}
}）;
} 公共同步启动无效（）{
的setSize（550，400）;
的setBounds（0，0，550，400）;
setIgnoreRepaint（真）;
createBufferStrategy（2）;
BufferStrategy中= getBufferStrategy（）; //线程
螺纹renderThread =新主题（这一点，名称+_main）;
renderThread.start（）;
gameRunning = TRUE;
} @覆盖
公共无效的run（）{
而（gameRunning）{
Graphics2D的图形=（Graphics2D的）bufferStrategy.getDrawGraphics（）; graphics.setColor（Color.RED）;
//使用的getWidth（）
graphics.fillRect（0，0，的getWidth（），的getHeight（））;
graphics.setColor（Color.GREEN）;
//使用这是用来设置画布的大小WIDTH
graphics.fillRect（5,5，宽度，高度）; graphics.dispose（）;
bufferStrategy.show（）; 尝试{
视频下载（60）;
}赶上（InterruptedException的前）{
}
}
}}
解决方案
您已经提供了优秀作品的例子。我修改了它一点点地演示了如何使用的getWidth /身高
公共无效的run（）{
而（gameRunning）{
Graphics2D的图形=（Graphics2D的）bufferStrategy.getDrawGraphics（）; graphics.setColor（Color.RED）;
graphics.fillRect（0，0，的getWidth（），的getHeight（））;
graphics.setColor（Color.GREEN）;
INT宽度=的getWidth（） - 50;
INT高度=的getHeight（） - 50;
graphics.fillRect（25，25，宽度，高度）;
graphics.setColor（Color.BLACK）;
FontMetrics对象FM = graphics.getFontMetrics（）;
graphics.drawString（外形尺寸为：+ frame.getWidth（）+X+ frame.getHeight（），0，fm.getAscent（））;
graphics.drawString（画布大小：+的getWidth（）+×+的getHeight（），0，fm.getAscent（）+ fm.getHeight（））; graphics.dispose（）;
bufferStrategy.show（）;
尝试{
视频下载（60）;
}赶上（InterruptedException的前）{
}
}
}
I am extending a Canvas and adding it to a JFrame. I understand that AWT and Swing should not be mixed and that drawing on JPanel is preferred but i'm trying to follow a game engine tutorial and i'd like to stick to it since I got it working so far. The Canvas has minimumSize, maximumSize, and prefferedSize set to the dimensions of 550, 400. When I do a draw call graphics.draw(0,0,550,400) it doesn't fill the entire screen as it should. I changed the draw call to graphics.draw(0,0,560,410) essentially adding 10px to it and it filled the entire screen. Whats wrong?
BTW: graphics.draw(10,10,550,400 draws the rectangle starting at the corner exactly so I don't think the JFrame is the issue.
The main call inside Launcher class
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();
}
});
}
The draw call, Launcher.HEIGHT and WIDTH are 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);
}
The extended Canvas class
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
}
}
}
Reqested 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();
}
}
}
As for the Java 2D game tutorial I am following it is a web series. Nevertheless, the link is the following click here. I modified the code quite a lot.
Modified for MadProgrammer
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) {
}
}
}
}
解决方案
The example you've provide works fine. I modified it a little to demonstrate the use of 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) {
}
}
}
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