From 6f19416129efc2b0150d310cfae5e2868ffad042 Mon Sep 17 00:00:00 2001
From: Felipe Alfonso <f.alfonso.espinosa@gmail.com>
Date: Wed, 8 Feb 2017 12:52:51 -0300
Subject: [PATCH] camera scrolling

---
 v3/src/camera/Camera-2.js                     | 4 +++-
 v3/src/components/experimental-Transform-2.js | 6 +++---
 v3/src/renderer/webgl/WebGLRenderer.js        | 3 +--
 3 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/v3/src/camera/Camera-2.js b/v3/src/camera/Camera-2.js
index 71d7fa481..507b5e24d 100644
--- a/v3/src/camera/Camera-2.js
+++ b/v3/src/camera/Camera-2.js
@@ -9,6 +9,8 @@ var Camera = function (x, y, width, height)
     this.state = null;
     this.statePositionX = 0.0;
     this.statePositionY = 0.0;
+    this.scrollX = 0.0;
+    this.scrollY = 0.0;
 };
 
 Camera.prototype.setState = function (state)
@@ -28,7 +30,7 @@ Camera.prototype.preRender = function (interpolation, renderer)
     stateTransform.positionX = this.x;
     stateTransform.positionY = this.y;
     
-    Transform.updateRoot(stateTransform);
+    Transform.updateRoot(stateTransform, -this.scrollX, -this.scrollY);
 };
 
 Camera.prototype.postRender = function ()
diff --git a/v3/src/components/experimental-Transform-2.js b/v3/src/components/experimental-Transform-2.js
index d24fa85ba..45e746fa3 100644
--- a/v3/src/components/experimental-Transform-2.js
+++ b/v3/src/components/experimental-Transform-2.js
@@ -72,7 +72,7 @@ Transform.prototype.remove = function (transform)
 	}
 };
 
-Transform.updateRoot = function (root)
+Transform.updateRoot = function (root, globalOffsetX, globalOffsetY)
 {
 	var currentChild = null;
 	var stackLength = 0;
@@ -117,8 +117,8 @@ Transform.updateRoot = function (root)
 		    var p4 = tempLocal[4];
 		    var p5 = tempLocal[5];
 			
-			transX = child.positionX;
-			transY = child.positionY;
+			transX = child.positionX + globalOffsetX;
+			transY = child.positionY + globalOffsetY;
 			scaleX = child.scaleX;
 			scaleY = child.scaleY;
 			rotation = child.rotation;
diff --git a/v3/src/renderer/webgl/WebGLRenderer.js b/v3/src/renderer/webgl/WebGLRenderer.js
index afa7a9e8f..20e6d0a22 100644
--- a/v3/src/renderer/webgl/WebGLRenderer.js
+++ b/v3/src/renderer/webgl/WebGLRenderer.js
@@ -273,7 +273,6 @@ WebGLRenderer.prototype = {
 
         var list = state.sys.children.list;
         var length = list.length;
-        var matrixBuffer = Transform.float32Buffer;
         for (var index = 0; index < length; ++index)
         {
             var child = list[index];
@@ -299,7 +298,7 @@ WebGLRenderer.prototype = {
                 this.blendMode = newBlendMode;
             }
             // drawing child
-            child.renderWebGL(this, child, interpolationPercentage, matrixBuffer);
+            child.renderWebGL(this, child, interpolationPercentage);
             batch = this.batch;
             if (batch && batch.isFull())
             {