From a49e4869c8eb7d9bfb681efe2828e578af8cd7e0 Mon Sep 17 00:00:00 2001
From: Andor Salga <andor.salga@senecac.on.ca>
Date: Thu, 21 Jul 2011 16:02:54 -0400
Subject: [PATCH 1/3] updated changelog, updated version

---
 CHANGELOG | 2 +-
 psapi.js  | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG b/CHANGELOG
index 10cfedd..89d8379 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,4 +1,4 @@
-July 19, 2011 - Release 0.75
+July 21, 2011 - Release 0.75
 
   * Created changelog
   * Added anti-aliasing option
diff --git a/psapi.js b/psapi.js
index 189203c..27ffdd0 100644
--- a/psapi.js
+++ b/psapi.js
@@ -6,7 +6,7 @@
   @class XB PointStream is a WebGL library designed to efficiently stream and
   render point cloud data in a canvas element.
   
-  @version 0.7
+  @version 0.75
 */
 var PointStream = (function() {
 
@@ -56,7 +56,7 @@ var PointStream = (function() {
     registeredParsers["pts"] = PTSParser;
     registeredParsers["ply"] = PLYParser;
     
-    const VERSION  = "0.7";
+    const VERSION  = "0.75";
     
     // file status of point clouds
     const FILE_NOT_FOUND = -1;

From b85160d6f5ce46ec0788bb0912dbf41ec92f781d Mon Sep 17 00:00:00 2001
From: Andor Salga <andor.salga@senecac.on.ca>
Date: Thu, 21 Jul 2011 18:24:29 -0400
Subject: [PATCH 2/3] Merge branches 'master' and '0.75'


From ec56545a5be75e78a125467aa1800b80f0b630f3 Mon Sep 17 00:00:00 2001
From: Andor Salga <asalga@Andors-MacBook-Pro.local>
Date: Sat, 10 Sep 2011 15:32:17 -0400
Subject: [PATCH 3/3] added delete function and test.

---
 demos/lion/lion.js |  6 ++++++
 psapi.js           | 20 +++++++++++++++++++-
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/demos/lion/lion.js b/demos/lion/lion.js
index bef0ae1..ae8d460 100644
--- a/demos/lion/lion.js
+++ b/demos/lion/lion.js
@@ -32,6 +32,12 @@ function keyDown(){
   if(ps.key == KEY_ESC){
     ps.stop("../../clouds/lion_1048K_n.psi");
   }
+
+  // D deletes and recreates the cloud
+  if(ps.key == 68 || ps.key == 100 ){
+    ps.delete(lion);
+    lion = ps.load("../../clouds/lion_1048K_n.psi");
+  }
 }
 
 function render() {
diff --git a/psapi.js b/psapi.js
index 27ffdd0..5b038a7 100644
--- a/psapi.js
+++ b/psapi.js
@@ -1211,7 +1211,25 @@ var PointStream = (function() {
     this.clear = function(){
       ctx.clear(ctx.COLOR_BUFFER_BIT | ctx.DEPTH_BUFFER_BIT);
     };
-        
+    
+    this.delete = function(pointCloud){
+      var semantics = Object.keys(pointCloud.attributes);
+      var firstSemantic = semantics[0];
+
+      var arrayOfBufferObjsV = pointCloud.attributes[firstSemantic];
+      if(arrayOfBufferObjsV){
+        // Iterate over all the vertex buffer objects.
+        for(var currVBO = 0; currVBO < arrayOfBufferObjsV.length; currVBO++){
+          // iterate over all the semantic names "ps_Vertex", "ps_Normal", etc.
+          for(name in semantics){
+            if(pointCloud.attributes[semantics[name]][currVBO]){
+              ctx.deleteBuffer(pointCloud.attributes[semantics[name]][currVBO].VBO);
+            }
+          }
+        }
+      }
+    };
+    
     /**
       Renders a point cloud.
       @param {} pointCloud