package {
    // Represents a star shape that can be drawn to the screen
    public class @ax-actionscript-lib-drawing-Star extends actionscript_lib_drawing_Polygon {
      // Constructor
      public function @ax-actionscript-lib-drawing-Star (numTips:int, 
                            innerRadius:Number, 
                            outerRadius:Number,
                            angle:Number = 0) {
        super();
        setStar(numTips, innerRadius, outerRadius, angle);
      }
  
      // Sets the physical characteristics of the star.
      // Based on Ric Ewing's ActionScript 1.0 drawing methods, available at:
      // http://www.macromedia.com/devnet/flash/articles/adv_draw_methods.html
      //   numTips      Number of tips (must be 3 or more)
      //   innerRadius  Radius of the base of the tips
      //   outerRadius  Radius of the summit of the tips
      //   angle        Starting angle in degrees (defaults to 0)
      public function setStar (numTips:int, 
                               innerRadius:Number, 
                               outerRadius:Number,
                               angle:Number = 0):void {
        // Calculate the polygon points of the star
        if (numTips > 2) {
          // Initialize variables
          var pointsX:Array = [];
          var pointsY:Array = [];
          var centerX:Number = outerRadius;
          var centerY:Number = outerRadius;
          var step:Number, halfStep:Number,
              startAngle:Number, dx:Number, dy:Number;
          // Calculate distance between tips
          step = (Math.PI*2)/numTips;
          halfStep = step/2;
          // Calculate starting angle in radians
          startAngle = (angle/180)*Math.PI;
          // Set starting point
          pointsX[0] = centerX+(Math.cos(startAngle)*outerRadius);
          pointsY[0] = centerY-(Math.sin(startAngle)*outerRadius);
          // Add remaining points
          for (var i:int=1; i <= numTips; i++) {
            dx = centerX+Math.cos(startAngle+(step*i)-halfStep)*innerRadius;
            dy = centerY-Math.sin(startAngle+(step*i)-halfStep)*innerRadius;
            pointsX.push(dx);
            pointsY.push(dy);
            dx = centerX+Math.cos(startAngle+(step*i))*outerRadius;
            dy = centerY-Math.sin(startAngle+(step*i))*outerRadius;
            pointsX.push(dx);
            pointsY.push(dy);
          }
          // Store the star's calculated points
          setPoints(pointsX,pointsY);
        }
      }
    }
  }