Added the new renderList property and addToRenderList method

Author: photonstorm

src/cameras/2d/Camera.js

@@ -206,6 +206,38 @@ var Camera = new Class({
          * @since 3.0.0
          */
         this._follow = null;
+
+        /**
+         * This array is populated with all of the Game Objects that this Camera has rendered
+         * in the previous (or current, depending on when you inspect it) frame.
+         *
+         * It is cleared at the start of `Camera.preUpdate`, or if the Camera is destroyed.
+         *
+         * You should not modify this array as it is used internally by the input system,
+         * however you can read it as required. Note that Game Objects may appear in this
+         * list multiple times if they belong to multiple non-exclusive Containers.
+         *
+         * @name Phaser.Cameras.Scene2D.Camera#renderList
+         * @type {Phaser.GameObjects.GameObject[]}
+         * @since 3.52.0
+         */
+        this.renderList = [];
+    },
+
+    /**
+     * Adds the given Game Object to this cameras render list.
+     *
+     * This is invoked during the rendering stage. Only objects that are actually rendered
+     * will appear in the render list.
+     *
+     * @method Phaser.Cameras.Scene2D.Camera#addToRenderList
+     * @since 3.52.0
+     *
+     * @param {Phaser.GameObjects.GameObject} child - The Game Object to add to the render list.
+     */
+    addToRenderList: function (child)
+    {
+        this.renderList.push(child);
     },
 
     /**
@@ -494,6 +526,8 @@ var Camera = new Class({
      */
     preRender: function ()
     {
+        this.renderList.length = 0;
+
         var width = this.width;
         var height = this.height;
 
@@ -793,6 +827,8 @@ var Camera = new Class({
 
         BaseCamera.prototype.destroy.call(this);
 
+        this.renderList = [];
+
         this._follow = null;
 
         this.deadzone = null;