我正在使用
Java Graphics而且我一直在变得“丑陋”.
这是我的Java程序所做的
这是在Matlab中做的同样的事情
我认为Java显然不像Matlab那样“好看”,特别是在圆的边缘.请注意,这与分辨率无关……这些图像的大小几乎相同.另请注意,我已经设置了渲染提示.
这是一个独立的主要功能,你可以运行来测试这个.
package test;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.awt.geom.Ellipse2D;
import java.awt.image.BufferedImage;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
public class SimplePaint02 {
private static final int LINE_THICKNESS = 4;
private static final int LINE_GAP = 10;
private Color lineColor = Color.red;
public static void main(String[] args) {
new SimplePaint02();
}
public SimplePaint02() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception ex) {
}
JFrame frame = new JFrame();
frame.setDefaultCloSEOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
@Override
public Dimension getPreferredSize() {
return new Dimension(100,100);
}
@Override
public void paintComponent(Graphics g) {
int radius = 50;
BufferedImage buffer = new BufferedImage(radius,radius,BufferedImage.TYPE_INT_ARGB);
Graphics2D g2d = buffer.createGraphics();
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BILINEAR);
Ellipse2D circle = new Ellipse2D.Float(0,radius);
Shape clip = g2d.getClip();
g2d.setClip(circle);
AffineTransform at = g2d.getTransform();
g2d.setTransform(AffineTransform.getRotateInstance(Math.toRadians(45),radius / 2,radius / 2));
int gap = LINE_GAP;
g2d.setColor(Color.WHITE);
g2d.fill(circle);
g2d.setColor(lineColor);
//g2d.setStroke(new BasicStroke(LINE_THICKNESS));
for (int index = 0; index < 10; index++) {
int x1 = index*gap-(LINE_THICKNESS/2);
int y1 = 0;
int x2 = index*gap+(LINE_THICKNESS/2);
int y2 = radius;
int width = x2 - x1;
int height = y2 - y1;
g2d.fillRect(x1,y1,width,height);
//g2d.drawLine(index * gap,index * gap,getRadius());
}
g2d.setTransform(at);
g2d.setClip(clip);
g2d.dispose();
g.drawImage(buffer,this);
}
}
}
解决方法
编辑：请参阅Code Guy的答案以获得解决方案.这是正确的,因为Joey Rohan最初想出来了！
当我尝试同样的事情时,我得到了顺利的优势：
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
public class DrawSmoothCircle {
public static void main(String[] argv) throws Exception {
BufferedImage bufferedImage = new BufferedImage(100,100,BufferedImage.TYPE_INT_RGB);
Graphics2D g2d = bufferedImage.createGraphics();
g2d.setRenderingHint (RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
g2d.setPaint(Color.green);
g2d.fillOval(10,10,50,50);
g2d.dispose();
ImageIO.write(bufferedImage,"png",new File("e:\\newimage.png"));
}
}
更新：
搜索了很多：
代码没有错,但是,
好吧,不幸的是Java 2D(或者至少Sun目前的实现)不支持“软剪辑”.
但也有一个技巧的剪辑：
按照This link,您可以实现您的要求.
(另外,我有一个平滑的边缘,因为我不会使用剪辑的东西,在我上面的图像)
