Hello all!

I'm trying to make something similar to what is shown on this video:
http://www.youtube.com/watch?v=Gv8nwCHQ_-w&feature=PlayList&p=3F18CCE722BE0302&index=1

I'm using Bryan Chung face detect library and my code is as follows:

import JMyron.*;

PFaceDetect face;
JMyron m;
PImage img;

float center_x;
float center_y;
int xx;
int yy;

void setup() {
 size(640,480, OPENGL);
 m = new JMyron();
 m.start(width,height);
 m.findGlobs(0);
 face = new PFaceDetect(this,width,height, "haarcascade_frontalface_default.xml");
 img = createImage(width,height,ARGB);
 rectMode(CORNER); //dimensões dos rectângulos a partir do seu canto(x,y)
 //noFill(); // desactiva o preenchimento de formas
 stroke(255,0,0);
 smooth(); //suaviza geometrias - atrasa o sistema
}

void draw() {
 background(0);

 
 camera(xx, yy, 220, // eyeX, eyeY, eyeZ
        0.0, 0.0, 0.0, // centerX, centerY, centerZ
        0.0, 1.0, 0.0); // upX, upY, upZ
 
 rect(200, 200, 100, 100);      
 
 m.update();
 arraycopy(m.cameraImage(),img.pixels);
 img.updatePixels();
 face.findFaces(img);
 //image(img,0,0);
 drawFace();
}

void drawFace() {
 int [][] res = face.getFaces();
 if (res.length>0) {
   for (int i=0;i<res.length;i++) {
     int x = res[i][0];
     xx = x;
     int y = res[i][1];
     yy = y;
     int w = res[i][2];
     int h = res[i][3];
     //rect(x,y,w,h); //Desenha rectângulo envolvente
   }
 }
}

void stop() {
 m.stop();
 super.stop();
}

void mousePressed(){
 m.settings();//click the window to get the settings
}

The reactangle disappears/jumps from the image.

What am I doing wrong?
How can I control the camera properties as desired?

Thanks in advance.

Best regards!