基于双精度(子像素精度)的Java绘制线 [英] Java Draw Line based on doubles (sub-pixel precision)
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问题描述
我正在制作一个基本的Java程序,我想使用基本的swing Graphics.drawLine 。
I am making a basic Java program and I would like to draw a line using basic swing Graphics.drawLine.
有没有办法根据双打来得出两点,这样我可以使输出更准确,或者更好的另一种方式?
Is there a way to make the two points in terms of doubles so I can make the output more accurate, or another way that is better?
推荐答案
您可以使用((Graphics2D)g).draw(Shape)
绘制线条并传递 Line2D.Double
。
You can draw the lines using ((Graphics2D) g).draw(Shape)
and pass it a Line2D.Double
.
这是一个演示:
import javax.swing.*;
public class FrameTestBase extends JFrame {
public static void main(String args[]) {
FrameTestBase t = new FrameTestBase();
t.add(new JComponent() {
public void paintComponent(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
for (int i = 0; i < 50; i++) {
double delta = i / 10.0;
double y = 5 + 5*i;
Shape l = new Line2D.Double(5, y, 200, y + delta);
g2.draw(l);
}
}
});
t.setDefaultCloseOperation(EXIT_ON_CLOSE);
t.setSize(400, 400);
t.setVisible(true);
}
}
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