Updated to support new Pixi style of points.

Author: photonstorm

src/geom/Polygon.js

@@ -22,13 +22,39 @@ Phaser.Polygon = function (points) {
     */
     this.type = Phaser.POLYGON;
 
+    //  If points isn't an array, use arguments as the array
+    if (!(points instanceof Array))
+    {
+        points = Array.prototype.slice.call(arguments);
+    }
+
+    //  If this is a flat array of numbers, convert it to points
+    if (points[0] instanceof Phaser.Point)
+    {
+        var p = [];
+
+        for (var i = 0, il = points.length; i < il; i++)
+        {
+            p.push(points[i].x, points[i].y);
+        }
+
+        points = p;
+    }
+
+    /**
+    * @property {array} points - An array of Points that make up this Polygon.
+    */
     this.points = points;
+
+    /**
+    * @property {boolean} closed - Is the Polygon closed or not?
+    */
+    this.closed = true;
+
 };
 
 Phaser.Polygon.prototype = {
 
-    type: null,
-
     /**
      * Creates a copy of the given Polygon.
      * This is a deep clone, the resulting copy contains new Phaser.Point objects
@@ -39,12 +65,7 @@ Phaser.Polygon.prototype = {
      */
     clone: function (output) {
 
-        var points = [];
-
-        for (var i=0; i < this.points.length; i++)
-        {
-            points.push(this.points[i].clone());
-        }
+        var points = this.points.slice();
 
         if (typeof output === "undefined" || output === null)
         {
@@ -72,12 +93,15 @@ Phaser.Polygon.prototype = {
         var inside = false;
 
         // use some raycasting to test hits https://github.com/substack/point-in-polygon/blob/master/index.js
-        for (var i = 0, j = this.points.length - 1; i < this.points.length; j = i++)
+
+        var length = this.points.length / 2;
+
+        for (var i = 0, j = length - 1; i < length; j = i++)
         {
-            var xi = this.points[i].x;
-            var yi = this.points[i].y;
-            var xj = this.points[j].x;
-            var yj = this.points[j].y;
+            var xi = this.points[i * 2].x;
+            var yi = this.points[i * 2 + 1].y;
+            var xj = this.points[j * 2].x;
+            var yj = this.points[j * 2 + 1].y;
 
             var intersect = ((yi > y) !== (yj > y)) && (x < (xj - xi) * (y - yi) / (yj - yi) + xi);
 
@@ -91,7 +115,33 @@ Phaser.Polygon.prototype = {
 
     },
 
-    setTo : function(points) {
+    /**
+    * Sets this Polygon to the given points.
+    *
+    * @method Phaser.Polygon#setTo
+    * @param {Phaser.Point[]|number[]} points - The array of Points.
+    * @return {boolean} True if the coordinates are within this polygon, otherwise false.
+    */
+    setTo: function (points) {
+
+        //  If points isn't an array, use arguments as the array
+        if (!(points instanceof Array))
+        {
+            points = Array.prototype.slice.call(arguments);
+        }
+
+        //  If this is a flat array of numbers, convert it to points
+        if (points[0] instanceof Phaser.Point)
+        {
+            var p = [];
+
+            for (var i = 0, il = points.length; i < il; i++)
+            {
+                p.push(points[i].x, points[i].y);
+            }
+
+            points = p;
+        }
 
         this.points = points;
 
@@ -144,7 +194,7 @@ Object.defineProperty(Phaser.Polygon.prototype, 'points', {
 /**
 * Returns the area of the polygon.
 *
-* @name Phaser.Circle#right
+* @name Phaser.Polygon#area
 * @readonly
 */
 Object.defineProperty(Phaser.Polygon.prototype, 'area', {
@@ -193,4 +243,4 @@ Object.defineProperty(Phaser.Polygon.prototype, 'area', {
 });
 
 //   Because PIXI uses its own Polygon, we'll replace it with ours to avoid duplicating code or confusion.
-PIXI.Polygon = Phaser.Polygon;
+// PIXI.Polygon = Phaser.Polygon;