Merge pull request #2504 from Nuuf/master

added functions for getting closest child and farthest child

src/core/Group.js

@@ -1975,6 +1975,63 @@ Phaser.Group.prototype.getBottom = function () {
 
 };
 
+/**
+ * Get the closest child to given Object/Point/Sprite/Image
+ *
+ * @method Phaser.Group#getClosestTo
+ * @return {any} The child closest to given Object/Point/Sprite/Image
+ */
+Phaser.Group.prototype.getClosestTo = function(object) {
+
+    if (this.children.length !== 0) {
+        var distance = Number.MAX_VALUE,
+            tempDistance = 0,
+            returnee;
+        this.forEachAlive(function(e) {
+
+            tempDistance = Math.abs(Phaser.Point.distance(object, e));
+
+            if (tempDistance < distance) {
+                distance = tempDistance;
+                returnee = e;
+            }
+        });
+
+        if (returnee) {
+            return returnee
+        };
+    }
+
+};
+
+/**
+ * Get the farthest child from given Object/Point/Sprite/Image
+ *
+ * @method Phaser.Group#getFarthestFrom
+ * @return {any} The child farthest from given Object/Point/Sprite/Image
+ */
+Phaser.Group.prototype.getFarthestFrom = function(object) {
+
+    if (this.children.length !== 0) {
+        var distance = 0,
+            tempDistance = 0,
+            returnee;
+        this.forEachAlive(function(e) {
+
+            tempDistance = Math.abs(Phaser.Point.distance(object, e));
+
+            if (tempDistance > distance) {
+                distance = tempDistance;
+                returnee = e;
+            }
+        });
+        if (returnee) {
+            return returnee
+        };
+    }
+
+};
+
 /**
 * Get the number of living children in this group.
 *