Drawing a circular outline in AS3

programming flash
1

I found this code in AS2. It draws an outline of a circle:


var origin = {x: 200, y: 200}; // the point at the centre of the circle

var radius = 100; // how big the circle is



this.createEmptyMovieClip("circle_mc", 1); // a clip to hold the drawing

this.circle_mc.lineStyle(3, 0xff0000, 100); // a 3pt red line is used to draw the circle

this.circle_mc.moveTo(origin.x, origin.y - radius); // move to the top of the circle to start

this.circle_mc.i = -Math.PI / 2; // set the starting angle

this.circle_mc.onEnterFrame = function() {

	var x = origin.x + Math.cos(this.i) * radius; // calculate the next x and y points

	var y = origin.y + Math.sin(this.i) * radius;

	this.lineTo(x, y); // and draw a line to it

	if (this.i < 3 * Math.PI / 2) { // if we have not yet got back to the start point

		this.i += Math.PI / 180; // keep going

	} else { // we're done

		delete this.onEnterFrame;

	}

};

I’m only just embarking on making the move to AS3 - can anyone help me convert this over?

Much appreciated.