draw primitive with actionscript

[jbum]

code:

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kRadiansToDegrees = 180/Math.PI;

kDegreesToRadians = Math.PI/180;



MovieClip.prototype.drawCircle = function(x,y,radius)

{

	var r = radius;

	

	var theta = 45*kDegreesToRadians;

	var cr = radius/Math.cos(theta/2);

	var angle = 0;

	var cangle = -theta/2;

	

	this.moveTo(x+r, y);

	for (var i=0;i < 8;i++) 

	{

		angle += theta;

		cangle += theta;

		var endX = r*Math.cos (angle);

		var endY = r*Math.sin (angle);

		var cX = cr*Math.cos (cangle);

		var cY = cr*Math.sin (cangle);

		this.curveTo(x+cX,y+cY, x+endX,y+endY);

	}

}



_root.clear();

_root.lineStyle(1,0xFF0000,100);

_root.drawCircle(100,100,50);

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