Hello,

I tried to make a program where two rectangles are rotating around their centers.

But the second of them is orbiting around the first one.

Code:

private void drawRect(int x, int y, int width, int height, double angle,
			Graphics2D g2) {
		AffineTransform old = g2.getTransform();
		AffineTransform af = new AffineTransform();
		af.rotate(Math.toRadians(angle), (double) width / 2.0,
				(double) height / 2.0);
		
		g2.transform(af);

		g2.fillRect(x, y, width, height);

		g2.transform(old);
	}

and then:

g2.setColor(Color.BLUE);
drawRect(0,0,100,100,angle,g2);

g2.setColor(Color.RED);
drawRect(200,200,50,100,angle2,g2);
angle+=0.3;
angle2++;

I tried using g2.rotate first,but it gave me the same problem,so I tried using AffineTransform.Of course,nothing changed...

Screenshot is attached.

Help!!!

Thanks,

MatejaS

Thanks @Glass_Knife but it didn't help...

It seems that even if I remove all code for drawing the blue rect,the red rect still orbites.Same thing if I first draw red,and then blue rect... Weird...

And it's not homework :)

Maybe I'm wrong here, but the anchor point you are using for your rotation is just width/2, height/2, you have to adjust for the x and y coordinates of the rectangle. If you modify your anchor point to:

af.rotate(Math.toRadians(angle), (double) (x + width / 2.0),
                (double) (y + height / 2.0));

Let us know...