// forked from kihon's 星形を描く package { import flash.display.Sprite; import flash.events.Event; import flash.geom.Point; import com.bit101.components.HUISlider; public class Main extends Sprite { private var sizeSlider:HUISlider; private var vertexSlider:HUISlider; public function Main() { vertexSlider = new HUISlider(this, 0, 400, "vertex", sliderHandler); sizeSlider = new HUISlider(this, 0, 420, "size", sliderHandler); vertexSlider.x = (465 - vertexSlider.width) / 2; sizeSlider.x = (465 - sizeSlider.width) / 2; vertexSlider.value = 3; vertexSlider.minimum = 3; vertexSlider.maximum = 20; sizeSlider.value = 100; sizeSlider.minimum = 10; sizeSlider.maximum = 232; } private function sliderHandler(event:Event):void { createPolygon(vertexSlider.value, 232, 232, sizeSlider.value, false); } private function createPolygon(vertex:int, x:int, y:int, size:int, star:Boolean = false):void { if (vertex < 3) vertex = 3; var points:Array = new Array(); for (var degree:Number = 0; degree < 360; degree += 360 / vertex) { var tx:Number = x + Math.cos(degree * Math.PI / 180) * size; var ty:Number = y + Math.sin(degree * Math.PI / 180) * size; points.push(new Point(tx, ty)); if (star) { tx = x + Math.cos((degree + 360 / vertex / 2) * Math.PI / 180) * (size / 2); ty = y + Math.sin((degree + 360 / vertex / 2) * Math.PI / 180) * (size / 2); points.push(new Point(tx, ty)); } } graphics.clear(); graphics.lineStyle(8.0, 0x0); graphics.moveTo(points[0].x, points[0].y); for (var i:int = 1; i < points.length; i++) { graphics.lineTo(points[i].x, points[i].y); } graphics.lineTo(points[0].x, points[0].y); } } }