can't rotate ellipse

[budsy remo]

hi i'm working on a simple code , but i am not able to rotate it correctly
please help .

I am using the Ellipse2D class with AffineTransform

import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.awt.geom.*;

public class RenderShape1
{
	public static void main(String... args)
	{
		EventQueue.invokeLater(new Runnable()
		{
			public void run()
			{
				Wind w1=new Wind();
				w1.setVisible(true);
				

w1.setDefaultCloseOperation(w1.EXIT_ON_CLOSE);	
			}
		});
	}
}
class Wind extends JFrame
{
	JButton b1;
	JMove m1;
	Wind()
	{
		Toolkit k=Toolkit.getDefaultToolkit();
		Dimension d=k.getScreenSize();
		int onefourth=(3*d.height)/4;
		setSize(d.width/2,onefourth);
		setTitle("pop");
		setLayout(null);
		
		b1=new JButton("click me");
		b1.setBounds(20,30,100,50);
		b1.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent e)
			{
				m1.setTrans();
				m1.renderShape();
			}
		});
		
		m1=new JMove();
		
		m1.setBounds(20,30,400,400);
		m1.setBackground(Color.RED);
		m1.add(b1);
		
		add(m1);
	}
}
class JMove extends JPanel
{	
	Ellipse2D e1;
	 AffineTransform at = new AffineTransform();
	public JMove()
	{
		e1=new Ellipse2D.Double(100,150,200,70);
		
	}
	public void setTrans()
	{
		at.rotate(Math.toRadians(90));
	}
	public void renderShape()
	{
		System.out.println("w");
		repaint();
	}
	
	public void paintComponent(Graphics g)
	{
		super.paintComponent(g);
		Graphics2D gd=(Graphics2D)g;
		gd.setPaint(Color.GREEN);
		gd.fill(e1);
		AffineTransform toCenterAt = new AffineTransform();
        		toCenterAt.concatenate(at);
		gd.transform(toCenterAt);
		gd.draw(e1);
	}
	
}

[john price]

e1=new Ellipse2D.Double(100,150,200,70);

Change to:
1. At the top of code:

double e1X_pos = 100;
double e1Y_pos = 150;
double e1Length = 200;
double e1Height = 70;
Ellipse2D e1;

2. Later in your code at paintComponent:

e1 = new Ellipse2D.Double(e1X_pos, e1Y_pos, e1Length, e1Height);

If you would like a real, working example I would be more than happy to accompany that request.
Good luck,
cc11rocks, aka John Price

EDIT: Then later in your code, set the things you need changed. For example, if you want e1 moved down, you just say:

e1Y_pos += 34;

Or whatever. Hopefully, I am clear and make sense. If not, I can give you a real life example.

[budsy remo]

Thanks for the reply but i really want to use the affinetransform in order to rotate that ellipse . I did think about the same thing while making the code . By changing the y coordinate of the ellipse would greatly make this code dependent for only this Shape . Actually what i am really trying to do is make a very simple tetris game out of it and by using AffineTransform i'll be able to make the different shapes( i'll be using more) coordinate independent .

[john price]

The

e1Y_pos += 34;  

was just an example.
I think it would probably help you if you used the technique I suggested. I don't know about the affinetransform method, but if you use variables instead of "fixed" values, you might save yourself from future problems, some of which MAY OR MAY NOT arise from using affinetransform and "fixed" values. Anyway, good luck!
cc11rocks aka John Price

[Darryl Burke]

Read about it here:
http://download.oracle.com/javase/tutorial/2d/advanced/transforming.html

[john price]

Darryl Burke wrote:Read about it here:
http://download.oracle.com/javase/tutorial/2d/advanced/transforming.html

That's some pretty cool stuff!

[budsy remo]

I have already read that article ,thatś why posted the question here !!