From 85d4b036b3850aa788ec6d5334d323614d0667a0 Mon Sep 17 00:00:00 2001
From: Richard Davey <rdavey@gmail.com>
Date: Sat, 17 Mar 2018 17:18:28 +0000
Subject: [PATCH] Actions.IncY has 3 new arguments: `step`, `index` and
 `direction`.

---
 src/actions/IncY.js | 27 ++++++++++++++++-----------
 1 file changed, 16 insertions(+), 11 deletions(-)

diff --git a/src/actions/IncY.js b/src/actions/IncY.js
index 377dea5ed..db202246f 100644
--- a/src/actions/IncY.js
+++ b/src/actions/IncY.js
@@ -4,25 +4,30 @@
  * @license      {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
  */
 
+var PropertyValueInc = require('./PropertyValueInc');
+
 /**
- * [description]
+ * Takes an array of Game Objects, or any objects that have a public `y` property,
+ * and then adds the given value to each of their `y` properties.
+ * 
+ * The optional `step` property is applied incrementally, multiplied by each item in the array.
+ * 
+ * To use this with a Group: `IncY(group.getChildren(), value, step)`
  *
  * @function Phaser.Actions.IncY
  * @since 3.0.0
  * 
- * @param {array} items - An array of Game Objects. The contents of this array are updated by this Action.
- * @param {number} value - [description]
+ * @param {array|Phaser.GameObjects.GameObject[]} items - The array of items to be updated by this action.
+ * @param {number} value - The amount to be added to the `y` property.
+ * @param {number} [step=0] - This is added to the `value` amount, multiplied by the iteration counter.
+ * @param {integer} [index=0] - An optional offset to start searching from within the items array.
+ * @param {integer} [direction=1] - The direction to iterate through the array. 1 is from beginning to end, -1 from end to beginning.
  *
- * @return {array} The array of Game Objects that was passed to this Action.
+ * @return {array} The array of objects that were passed to this Action.
  */
-var IncY = function (items, value)
+var IncY = function (items, value, step, index, direction)
 {
-    for (var i = 0; i < items.length; i++)
-    {
-        items[i].y += value;
-    }
-
-    return items;
+    return PropertyValueInc(items, 'y', value, step, index, direction);
 };
 
 module.exports = IncY;