Added SetZ Action and exposed via Group

Author: photonstorm

v3/src/actions/SetZ.js

@@ -0,0 +1,13 @@
+var SetZ = function (items, value, step)
+{
+    if (step === undefined) { step = 0; }
+
+    for (var i = 0; i < items.length; i++)
+    {
+        items[i].z = value + (i * step);
+    }
+
+    return items;
+};
+
+module.exports = SetZ;

v3/src/actions/index.js

@@ -36,6 +36,7 @@ module.exports = {
     SetX: require('./SetX'),
     SetXY: require('./SetXY'),
     SetY: require('./SetY'),
+    SetZ: require('./SetZ'),
     ShiftPosition: require('./ShiftPosition'),
     SmootherStep: require('./SmootherStep'),
     SmoothStep: require('./SmoothStep'),

v3/src/gameobjects/group/Group.js

@@ -430,6 +430,13 @@ var Group = new Class({
         return this;
     },
 
+    setZ: function (value, step)
+    {
+        Actions.SetZ(this.children.entries, value, step);
+
+        return this;
+    },
+
     shiftPosition: function (x, y, direction, output)
     {
         Actions.ShiftPosition(this.children.entries, x, y, direction, output);