flash on 2010-3-23

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favorite:1
lines:38
license : MIT License
modified : 2010-03-23 11:00:42

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package {

import flash.display.Sprite;
	import flash.utils.getTimer;

public class CircleDraw extends Sprite {
		
		private const NUM_POINTS:int = 60;
		private const RADIUS:Number = 100;
		private const TWOPI:Number = Math.PI*2;
		private var points:Vector.<Number> = new Vector.<Number>(NUM_POINTS*2);
		private var cmds:Vector.<int> = new Vector.<int>(NUM_POINTS+2);

public function CircleDraw() {
            
			var start1:Number = getTimer();
			for(var c:int = 0; c < 1000; ++c)
			{
				trigDrawCircle();
				renderCircle();
			}
			var time1:Number = getTimer() - start1;
			trace(time1);
        }
		
		private function trigDrawCircle():void
		{
			cmds[0] = 1;
			var cx:Number = RADIUS + Math.random()*(stage.stageWidth - RADIUS*2);
			var cy:Number = RADIUS + Math.random()*(stage.stageHeight - RADIUS*2);

for(var i:int = 0; i < NUM_POINTS*2; i+=2)
			{
				points[i] = cx + RADIUS*Math.cos(TWOPI*i/NUM_POINTS);
				points[i+1] = cy + RADIUS*Math.sin(TWOPI*i/NUM_POINTS);

cmds[int(i*.5)] = i?2:1;
			}
			//cmds[NUM_POINTS+1] = 2;
		}

private function renderCircle():void
		{
			graphics.lineStyle(0);
			graphics.drawPath(cmds, points);
		}

}
}

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