I'm having a little problem with SimpleOpenNI's Pointcloud. I'm trying to run the sketch page 115 from the book Making Things See, here's a copy of it :

2. import  processing.opengl.*;
3. import SimpleOpenNI.*;
4. SimpleOpenNI kinect;
5. 
   
6. void setup(){
7.   size(1024, 768, OPENGL);
8.   kinect = new SimpleOpenNI(this);
9.   kinect.enableDepth();
10. }
11. 
    
12. void draw(){
13.   background(0);
14.   kinect.update();
15.   
16.   translate(width/2, height/2, -1000);
17.   rotateX(radians(180));
18.   
19.   stroke(255);
20.   
21.   PVector[] depthPoints = kinect.depthMapRealWorld();
22.   for(int i = 0; i < depthPoints.length; i++){
23.     PVector currentPoint = depthPoints[i];
24.     point(currentPoint.x, currentPoint.y, currentPoint.z);
25.   }
26. }

I was supposed to have something like this (picture taken from the book), but instead I got something like that, with an incredibly low framerate (something like 2 images per second).

I thought it was a problem with Processing 2.0 and the changes made to P3D/OpenGL, but I created a Snow-Leopart partition on my hard drive and I tried to run the sketch on it with Processing 1.5.1 and I still have the same problem. I also tried to update my graphic card's driver, but it doesn't change anything at all.

Does anyone have an idea of what's going on ? 

Note : I'm using Processing 2.0b7 on Mac OS 10.8.2 (Mountain Lion).

Thanks in advance :-) !

PS : I tried to run Dan Shiffman's PointCloud example from his Kinect library and it works fine, with a normal framerate.