How to draw THIS ?

Java 2D
#1

sorry to bother you with this “simple” problem

http://img18.imageshack.us/img18/1229/20034234.png

how to draw THIS ?

I thought about drawing a circle and then fill the rest with lines, but I am not that good with algorithms

note: you cannot cover up space you can only draw black
I use Java2D, so this would be with drawArc and drawLine and stuff

#2

why not draw a black rectangle and then a white circle?

#3

I said only black ? =)

because there are graphics behind this object which cannot be covered by white of course

btw so simplify the problem / algorithm

you can also draw this

http://img22.imageshack.us/img22/9201/so2.png

there is a border now, this is perfectly fine aswell

and obvisouly dont worry about anti-aliasing

#4 

Graphics2D g = ...
Area result = new Area(new Rectangle2D.Double(0,0,500,500));
Area cut = new Area(new Ellipse2D.Double(0,0,500,500));

result.subtract(cut);
g.setColor(Color.black);
g.fill(result);

Kev

#5

oh nice, it was that easy afterall
well I didn’t thought there was a subtract method
really handy

#6

That really sounds like a homework problem. Why else would you have such odd constraints?

#7

Dunno, but he is around for some time and this could possibly be for his 2d game project, like masking out a light cone or something.

#8

Good point :wink:

#9

[quote] like masking out a light cone
[/quote]
100 points gentleman =D

however… if you are interested, I ended up with this:

g.setColor(new Color(0,0,0,200));
		
		g.fillRect(0,0,1024,500);    // above
		g.fillRect(0,650,1024,118);  // below
		g.fillRect(0,500,500,150);   // left of it
		g.fillRect(650,500,374,150); //right of it
		
		Point2D center = new Point2D.Float(575, 575);
     	float radius = 75;
     	float[] dist = {0.0f, 1.0f};
     	Color[] colors = {new Color(0,0,0,0),new Color(0,0,0,200)};
     	RadialGradientPaint p =new RadialGradientPaint(center, radius, dist, colors);
     
     	g.setPaint(p);
     
     	g.fillRect(500,500,150,150);

so basically using a RadialGradientPaint.

because I thought once I got the form I suggested I could easily do a disappearing gradient inside. But it turned out with … well. just ugly

yeah well this works, I might use it in some dark levels or something like that.