Actionscript:
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var canvas:BitmapData = new BitmapData(400, 400, false, 0xCCCCCC);
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addChild(new Bitmap(canvas));
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fillCircle(100,100,50,0xFF0000);
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function fillCircle(xp:Number,yp:Number, radius:Number, col:uint = 0x000000):void {
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var xoff:int =0;
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var yoff:int = radius;
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var balance:int = -radius;
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while (xoff <= yoff) {
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var p0:int = xp - xoff;
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var p1:int = xp - yoff;
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var w0:int = xoff + xoff;
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var w1:int = yoff + yoff;
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hLine(p0, yp + yoff, w0, col);
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hLine(p0, yp - yoff, w0, col);
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hLine(p1, yp + xoff, w1, col);
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hLine(p1, yp - xoff, w1, col);
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if ((balance += xoff++ + xoff)>= 0) {
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balance-=--yoff+yoff;
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}
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}
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}
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function hLine(xp:Number, yp:Number, w:Number, col:uint):void {
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for (var i:int = 0; i <w; i++){
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canvas.setPixel(xp + i, yp, col);
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}
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}
An implementation of yesterdays post that draws a filled circle instead of an outlined circle.