Problem loading new markup data

[asultanpur]

New data doesn't get loaded when the newData event gets dispatched with fresh points. The following patch seems to fix the issue.

diff --git a/docs/markupExt.js b/docs/markupExt.js
index 9ed4cd3..8e3185f 100644
--- a/docs/markupExt.js
+++ b/docs/markupExt.js
@@ -70,6 +70,7 @@ markup3d.prototype.unload = function() {
 
 markup3d.prototype.load = function() {
     var self = this;
+    this.material = null;
     this.offset = viewer.model.getData().globalOffset; // use global offset to align pointCloud with lmv scene
 
     // setup listeners for new data and mouse events
@@ -101,7 +102,7 @@ markup3d.prototype.load = function() {
         else {
             // create new point cloud material
             var texture = THREE.ImageUtils.loadTexture("img/icons.png");
-            var material = new THREE.ShaderMaterial({
+            this.material = new THREE.ShaderMaterial({
                 vertexColors: THREE.VertexColors,
                 fragmentShader: this.fragmentShader,
                 vertexShader: this.vertexShader,
@@ -113,7 +114,7 @@ markup3d.prototype.load = function() {
                 }
             });
         }
-        this.pointCloud = new THREE.PointCloud(this.geometry, material);
+        this.pointCloud = new THREE.PointCloud(this.geometry, this.material);
         this.pointCloud.position.sub( this.offset );
         this.scene.add(this.pointCloud);
     }