Question

Here’s my problem- I’m trying to draw a circular part of a single image.

I’m doing some work on a top-down dungeon crawler sort of game, and I’m attempting to make a light radius around the player. The floor is a single image, and I need to draw only a small, circular part of it. I’ve been looking at this method:

drawImage(Image img,
          int dx1, 
          int dy1,
          int dx2,
          int dy2,
          int sx1,
          int sy1,
          int sx2,
          int sy2,
          Color bgcolor, 
          ImageObserver observer) 

But, that looks like it would only draw a square subsection.
Does anyone happen to know an easier method than drawing tons of little squares to give the illusion of a circle?

Thanks

Answer 1

You can do this with the setClip() method in Graphics.

It needs some other work, but:

import java.awt.Graphics;
import java.awt.geom.QuadCurve2D;
//...

  g.setClip(new QuadCurve()); // Set the bounding curve for the image.
  g.drawImage(...);

As I said, it needs more work, meaning the QuadCurve2D object might need to be defined differently, but you can check the doc for that.