Java 不喜欢直线的区域生成
我在用java制作的JRPG游戏中使用区域生成和绘图代码为瓷砖精灵创建碰撞区域——这不是一个主要的成熟游戏,更多的只是一个概念证明供我学习 除直线外,区域生成工作正常: 这些图像是在photoshop中打开的碰撞轮廓(背景)和java代码基于红色生成的区域(前景)。如图所示,第一幅图中的大红线不会被画出来,除非每2个像素下有一个红色像素,如第二幅图所示Java 不喜欢直线的区域生成,java,image,awt,java-2d,Java,Image,Awt,Java 2d,我在用java制作的JRPG游戏中使用区域生成和绘图代码为瓷砖精灵创建碰撞区域——这不是一个主要的成熟游戏,更多的只是一个概念证明供我学习 除直线外,区域生成工作正常: 这些图像是在photoshop中打开的碰撞轮廓(背景)和java代码基于红色生成的区域(前景)。如图所示,第一幅图中的大红线不会被画出来,除非每2个像素下有一个红色像素,如第二幅图所示 我没有对代码做任何更改(除了添加注释以更好地理解它),除了删除 Graphics2D g = imageOutline.createGrap
我没有对代码做任何更改(除了添加注释以更好地理解它),除了删除
Graphics2D g = imageOutline.createGraphics();
//...
g.dispose();
从areaOutline绘制代码中,将其替换为我自己的Graphics2D变量。我测试了这两行代码和没有这两行代码,我看不出有什么区别
我有点纠结于是什么导致了这个问题——这不是一个重大的破坏游戏的问题,因为我可以用几种方法解决它,但这确实意味着我必须向任何人解释这个问题,当我向他们展示如何使用他们自己的精灵纹理时
我已经为这个问题创建了一个SSCCE,它显示了生成的区域有很好的垂直线,但水平线没有。它拍摄两幅图像——都是一个30x30像素的正方形,但其中一幅每2秒有一个内部像素,从而生成更精确的区域 当您按键时,程序将在两个图像(及其区域)之间切换,以便进行直接比较 以下两个图像必须放在程序的根文件夹中 您可以通过运行“main”方法启动程序
import java.awt.*;
导入javax.swing.*;
导入java.awt.event.*;
导入java.awt.image.*;
导入java.awt.geom.*;
导入java.io.*;
导入javax.imageio.*;
公共类AreaOutlineCanvas扩展JFrame实现KeyListener
{
私人图像面板图像面板;
/**
*类骨架对象的构造函数
*/
公共区域大纲
{
//初始化实例变量
addKeyListener(此);
initUI();
}
公共静态void main(字符串[]args)
{
for(字符串s:args)
{
系统输出打印项次;
}
SwingUtilities.invokeLater(新的Runnable()
{
@凌驾
公开募捐
{
AreaOutlineCanvas aOC=新的AreaOutlineCanvas();
aOC.pack();
aOC.setVisible(真);
aOC.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
} );
}
私有void initUI()
{
imagePanel=新的imagePanel();
setPreferredSize(新尺寸(100100));
setLocationRelativeTo(空);
添加(图像面板);
imagePanel.setDoubleBuffered(真);
包装();
}
@凌驾
public void keyTyped(KeyEvent e)
{
}
@凌驾
按下公共无效键(按键事件e)
{
//@TODO:切换状态检查菜单框架是否在(当前菜单)
如果(imagePanel!=null)
{
imagePanel.bDrawingFirstArea=!imagePanel.bDrawingFirstArea;
imagePanel.repaint();
}
}
@凌驾
公共无效密钥已释放(密钥事件e)
{
//System.out.println(“密钥释放:“+e.getKeyChar()+”(“+e.getKeyCode()+”));
}
公共类ImagePanel扩展了JPanel
{
/**此角色精灵表位置的路径*/
私有字符串firstPath=“square1.png”;
私有字符串secondPath=“square2.png”;
私有缓冲区映像firstImage;
私有缓冲区映像二次映像;
私家区;
私人区域;
公共布尔值bDrawingFirstArea=true;
/**
*类字符对象的构造函数
*/
公众影像小组()
{
loadImages();
generateAreas();
}
私有void loadImages()
{
尝试
{
firstImage=ImageIO.read(新文件(firstPath));
secondImage=ImageIO.read(新文件(secondPath));
}
捕获(IOE异常)
{
e、 printStackTrace();
}
}
私有无效生成器EAS()
{
颜色c=新颜色(255,0,0);
firstImageArea=getOutline(c,firstImage);
secondImageArea=getOutline(c,secondImage);
}
公共区域getOutline(颜色目标、BuffereImage bi){
//构造通用路径
GeneralPath gp=新的GeneralPath();
布尔控制=假;
int targetRGB=target.getRGB();
对于(int xx=0;xx那么上面的图像就是你想要的,而第二个图像就是你得到的?你能把原始图像嵌入问题中吗?@AndrewThompson我不太确定你所说的原始图像是什么意思。上面的图像是我想要的,但只能通过每2个像素在长红线下添加一个像素来获得。第二个图像是我的原始图像没有生成直线的图像。你可能会困惑地认为背景中的红线是放大的-它们是在photoshop中打开的图像,用于与区域生成中概述的内容进行比较-我将更新我的问题以反映that@AndrewThompson经过更多测试和实施碰撞检测后问题似乎只是在于绘制区域——它是以正确的形状生成的,但不是以正确的形状绘制的,这远不是一个简单的问题concern@AndrewThompson我仍然有这个问题,我之前的说法是错误的——没有画出这个区域
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.image.*;
import java.awt.geom.*;
import java.io.*;
import javax.imageio.*;
public class AreaOutlineCanvas extends JFrame implements KeyListener
{
private ImagePanel imagePanel;
/**
* Constructor for objects of class Skeleton
*/
public AreaOutlineCanvas()
{
// initialise instance variables
addKeyListener( this );
initUI();
}
public static void main( String[] args )
{
for( String s: args )
{
System.out.println( s );
}
SwingUtilities.invokeLater( new Runnable()
{
@Override
public void run()
{
AreaOutlineCanvas aOC = new AreaOutlineCanvas();
aOC.pack();
aOC.setVisible( true );
aOC.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
}
} );
}
private void initUI()
{
imagePanel = new ImagePanel();
setPreferredSize( new Dimension( 100, 100 ) );
setLocationRelativeTo( null );
add( imagePanel );
imagePanel.setDoubleBuffered( true );
pack();
}
@Override
public void keyTyped( KeyEvent e )
{
}
@Override
public void keyPressed( KeyEvent e )
{
//@TODO: switch statment checking the menu Skeleton is in (currentMenu)
if( imagePanel != null )
{
imagePanel.bDrawingFirstArea = !imagePanel.bDrawingFirstArea;
imagePanel.repaint();
}
}
@Override
public void keyReleased(KeyEvent e)
{
//System.out.println( "Key released: " + e.getKeyChar() + " (" + e.getKeyCode() + ")" );
}
public class ImagePanel extends JPanel
{
/** Path for the location of this charactors sprite sheet */
private String firstPath = "square1.png";
private String secondPath = "square2.png";
private BufferedImage firstImage;
private BufferedImage secondImage;
private Area firstImageArea;
private Area secondImageArea;
public boolean bDrawingFirstArea = true;
/**
* Constructor for objects of class Character
*/
public ImagePanel()
{
loadImages();
generateAreas();
}
private void loadImages()
{
try
{
firstImage = ImageIO.read( new File( firstPath ) );
secondImage = ImageIO.read( new File( secondPath ) );
}
catch( IOException e )
{
e.printStackTrace();
}
}
private void generateAreas()
{
Color c = new Color( 255, 0, 0 );
firstImageArea = getOutline( c, firstImage );
secondImageArea = getOutline( c, secondImage );
}
public Area getOutline(Color target, BufferedImage bi) {
// construct the GeneralPath
GeneralPath gp = new GeneralPath();
boolean cont = false;
int targetRGB = target.getRGB();
for (int xx=0; xx<bi.getWidth(); xx++) {
for (int yy=0; yy<bi.getHeight(); yy++) {
if (bi.getRGB(xx,yy)==targetRGB) {
if (cont) {
gp.lineTo(xx,yy);
gp.lineTo(xx,yy+1);
gp.lineTo(xx+1,yy+1);
gp.lineTo(xx+1,yy);
gp.lineTo(xx,yy);
} else {
gp.moveTo(xx,yy);
}
cont = true;
} else {
cont = false;
}
}
cont = false;
}
gp.closePath();
// construct the Area from the GP & return it
return new Area(gp);
}
@Override
public void paintComponent( Graphics g )
{
super.paintComponent( g );
drawImages(g);
}
private void drawImages( Graphics g )
{
Graphics2D g2d = (Graphics2D) g;
if( bDrawingFirstArea )
{
g2d.drawImage( firstImage, 50, 0, this );
g2d.draw( firstImageArea );
}
else
{
g2d.drawImage( secondImage, 50, 0, this );
g2d.draw( secondImageArea );
}
Toolkit.getDefaultToolkit().sync();
}
}
}
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.awt.geom.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
/* Gain the outline of an image for further processing. */
class ImageOutline {
private BufferedImage image;
private TwoToneImageFilter twoToneFilter;
private BufferedImage imageTwoTone;
private JLabel labelTwoTone;
private BufferedImage imageOutline;
private Area areaOutline = null;
private JLabel labelOutline;
private JLabel targetColor;
private JSlider tolerance;
private JProgressBar progress;
private SwingWorker sw;
public ImageOutline(BufferedImage image) {
this.image = image;
imageTwoTone = new BufferedImage(
image.getWidth(),
image.getHeight(),
BufferedImage.TYPE_INT_RGB);
}
public void drawOutline() {
if (areaOutline!=null) {
Graphics2D g = imageOutline.createGraphics();
g.setColor(Color.WHITE);
g.fillRect(0,0,imageOutline.getWidth(),imageOutline.getHeight());
g.setColor(Color.RED);
g.setClip(areaOutline);
g.fillRect(0,0,imageOutline.getWidth(),imageOutline.getHeight());
g.setColor(Color.BLACK);
g.setClip(null);
g.draw(areaOutline);
g.dispose();
}
}
public Area getOutline(Color target, BufferedImage bi) {
// construct the GeneralPath
GeneralPath gp = new GeneralPath();
boolean cont = false;
int targetRGB = target.getRGB();
for (int xx=0; xx<bi.getWidth(); xx++) {
for (int yy=0; yy<bi.getHeight(); yy++) {
if (bi.getRGB(xx,yy)==targetRGB) {
if (cont) {
gp.lineTo(xx,yy);
gp.lineTo(xx,yy+1);
gp.lineTo(xx+1,yy+1);
gp.lineTo(xx+1,yy);
gp.lineTo(xx,yy);
} else {
gp.moveTo(xx,yy);
}
cont = true;
} else {
cont = false;
}
}
cont = false;
}
gp.closePath();
// construct the Area from the GP & return it
return new Area(gp);
}
public JPanel getGui() {
JPanel images = new JPanel(new GridLayout(2,2,2,2));
JPanel gui = new JPanel(new BorderLayout(3,3));
JPanel originalImage = new JPanel(new BorderLayout(2,2));
final JLabel originalLabel = new JLabel(new ImageIcon(image));
targetColor = new JLabel("Target Color");
targetColor.setForeground(Color.RED);
targetColor.setBackground(Color.WHITE);
targetColor.setBorder(new LineBorder(Color.BLACK));
targetColor.setOpaque(true);
JPanel controls = new JPanel(new BorderLayout());
controls.add(targetColor, BorderLayout.WEST);
originalLabel.addMouseListener( new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent me) {
originalLabel.setCursor(
Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));
}
@Override
public void mouseExited(MouseEvent me) {
originalLabel.setCursor(Cursor.getDefaultCursor());
}
@Override
public void mouseClicked(MouseEvent me) {
int x = me.getX();
int y = me.getY();
Color c = new Color( image.getRGB(x,y) );
targetColor.setBackground( c );
updateImages();
}
});
originalImage.add(originalLabel);
tolerance = new JSlider(
JSlider.HORIZONTAL,
0,
255,
104
);
tolerance.addChangeListener( new ChangeListener() {
public void stateChanged(ChangeEvent ce) {
updateImages();
}
});
controls.add(tolerance, BorderLayout.CENTER);
gui.add(controls,BorderLayout.NORTH);
images.add(originalImage);
labelTwoTone = new JLabel(new ImageIcon(imageTwoTone));
images.add(labelTwoTone);
images.add(new JLabel("Smoothed Outline"));
imageOutline = new BufferedImage(
image.getWidth(),
image.getHeight(),
BufferedImage.TYPE_INT_RGB
);
labelOutline = new JLabel(new ImageIcon(imageOutline));
images.add(labelOutline);
updateImages();
progress = new JProgressBar();
gui.add(images, BorderLayout.CENTER);
gui.add(progress, BorderLayout.SOUTH);
return gui;
}
private void updateImages() {
if (sw!=null) {
sw.cancel(true);
}
sw = new SwingWorker() {
@Override
public String doInBackground() {
progress.setIndeterminate(true);
adjustTwoToneImage();
labelTwoTone.repaint();
areaOutline = getOutline(Color.BLACK, imageTwoTone);
drawOutline();
return "";
}
@Override
protected void done() {
labelOutline.repaint();
progress.setIndeterminate(false);
}
};
sw.execute();
}
public void adjustTwoToneImage() {
twoToneFilter = new TwoToneImageFilter(
targetColor.getBackground(),
tolerance.getValue());
Graphics2D g = imageTwoTone.createGraphics();
g.drawImage(image, twoToneFilter, 0, 0);
g.dispose();
}
public static void main(String[] args) throws Exception {
int size = 150;
final BufferedImage outline =
new BufferedImage(size,size,BufferedImage.TYPE_INT_RGB);
Graphics2D g = outline.createGraphics();
g.setColor(Color.WHITE);
g.fillRect(0,0,size,size);
g.setRenderingHint(
RenderingHints.KEY_DITHERING,
RenderingHints.VALUE_DITHER_ENABLE);
g.setRenderingHint(
RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
Polygon p = new Polygon();
p.addPoint(size/2, size/10);
p.addPoint(size-10, size-10);
p.addPoint(10, size-10);
Area a = new Area(p);
Rectangle r = new Rectangle(size/4, 8*size/10, size/2, 2*size/10);
a.subtract(new Area(r));
int radius = size/10;
Ellipse2D.Double c = new Ellipse2D.Double(
(size/2)-radius,
(size/2)-radius,
2*radius,
2*radius
);
a.subtract(new Area(c));
g.setColor(Color.BLACK);
g.fill(a);
ImageOutline io = new ImageOutline(outline);
JFrame f = new JFrame("Image Outline");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(io.getGui());
f.pack();
f.setResizable(false);
f.setLocationByPlatform(true);
f.setVisible(true);
}
}
class TwoToneImageFilter implements BufferedImageOp {
Color target;
int tolerance;
TwoToneImageFilter(Color target, int tolerance) {
this.target = target;
this.tolerance = tolerance;
}
private boolean isIncluded(Color pixel) {
int rT = target.getRed();
int gT = target.getGreen();
int bT = target.getBlue();
int rP = pixel.getRed();
int gP = pixel.getGreen();
int bP = pixel.getBlue();
return(
(rP-tolerance<=rT) && (rT<=rP+tolerance) &&
(gP-tolerance<=gT) && (gT<=gP+tolerance) &&
(bP-tolerance<=bT) && (bT<=bP+tolerance) );
}
public BufferedImage createCompatibleDestImage(
BufferedImage src,
ColorModel destCM) {
BufferedImage bi = new BufferedImage(
src.getWidth(),
src.getHeight(),
BufferedImage.TYPE_INT_RGB);
return bi;
}
public BufferedImage filter(
BufferedImage src,
BufferedImage dest) {
if (dest==null) {
dest = createCompatibleDestImage(src, null);
}
for (int x=0; x<src.getWidth(); x++) {
for (int y=0; y<src.getHeight(); y++) {
Color pixel = new Color(src.getRGB(x,y));
Color write = Color.BLACK;
if (isIncluded(pixel)) {
write = Color.WHITE;
}
dest.setRGB(x,y,write.getRGB());
}
}
return dest;
}
public Rectangle2D getBounds2D(BufferedImage src) {
return new Rectangle2D.Double(0, 0, src.getWidth(), src.getHeight());
}
public Point2D getPoint2D(
Point2D srcPt,
Point2D dstPt) {
// no co-ord translation
return srcPt;
}
public RenderingHints getRenderingHints() {
return null;
}
}