How to draw line from oval surface(edge)

You can draw the line from the center and use clipping to make the part of the line inside the oval/rectangle invisible.

import java.awt.Color;

import java.awt.Graphics2D;

import java.awt.geom.Area;

import java.awt.geom.Line2D;

import java.awt.geom.RoundRectangle2D;

import java.awt.image.BufferedImage;

import java.io.IOException;

import java.net.MalformedURLException;

import javax.swing.ImageIcon;

import javax.swing.JFrame;

import javax.swing.JLabel;

public class DrawLineFromOvalSurface {

public static void main(String[] args) throws MalformedURLException, IOException {

JFrame frame = new JFrame();

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

BufferedImage image = new BufferedImage(200, 200, BufferedImage.TYPE_INT_BGR);

Graphics2D g = image.createGraphics();

g.setColor(Color.WHITE);

g.fillRect(0, 0, image.getWidth(), image.getHeight());

g.setColor(Color.BLACK);

RoundRectangle2D rr = new RoundRectangle2D.Double(50, 50, 100, 100, 50, 50);

g.draw(rr);

Line2D line = new Line2D.Double(rr.getCenterX(), rr.getCenterY(), 190, 190);

Area area = new Area(line.getBounds());

area.subtract(new Area(rr));

g.setClip(area);

g.draw(line);

frame.getContentPane().add(new JLabel(new ImageIcon(image)));

frame.pack();

frame.setVisible(true);

}

}

Rodney_McKaya at 2007-7-9 0:03:07 >