My goal is to show a 3D model from rhino as an Augmented reality.

For the moment am I testing with a simple yellow square that i made in Rhino and exported as an .obj. 
The square that is shown has a lot of holes in the mesh.
Is it an exporting issue from rhino ? or got it something to do with the objLoader?



Here is the code I am using:

1. 
   import java.io.*; // for the loadPatternFilenames() function
   import processing.opengl.*; // for OPENGL rendering
   import jp.nyatla.nyar4psg.*; // the NyARToolkit Processing library
   import codeanticode.gsvideo.*; // the GSVideo library
   import codeanticode.glgraphics.*;
   import saito.objloader.*;
   
   MultiMarker nya;
   GSCapture cam;
   
   // declare that we need a OBJModel and we'll be calling it "model"
   OBJModel model;
   
   // these booleans will be used to turn on and off bits of the OBJModel
   //boolean bTexture = true;
   //boolean bStroke = false;
   //boolean bMaterial = false;
   String camPara = "/Users/marre_j/Documents/Processing/libraries/NyAR4psg/data/camera_para.dat";
   // the full path to the .patt pattern files
   String patternPath = "/Users/marre_j/Documents/Processing/libraries/NyAR4psg/patternMaker/examples/ARToolKit_Patterns";
   // the dimensions at which the AR will take place. with the current library 1280x720 is about the highest possible resolution.
   int arWidth = 640;
   int arHeight = 360;
   // the number of pattern markers (from the complete list of .patt files) that will be detected, here the first 10 from the list.
   int numMarkers = 10;
   
   void setup()
   {
       size(640, 480, P3D);
    
       // making an object called "model" that is a new instance of OBJModel
       model = new OBJModel(this,"b.obj", "relative");
      cam = new GSCapture(this, 640, 480); // initialize the webcam capture at a specific resolution (correct and/or possible settings depend on YOUR webcam)
      cam.start(); // start capturing
     // initialize the MultiMarker at a specific resolution (make sure to input images for detection EXACTLY at this resolution)
     nya = new MultiMarker(this, arWidth, arHeight, camPara, NyAR4PsgConfig.CONFIG_DEFAULT);
     // set the delay after which a lost marker is no longer displayed. by default set to something higher, but here manually set to immediate.
     nya.setLostDelay(1);
     // load the pattern filenames (markers)
     String[] patterns = loadPatternFilenames(patternPath);
     // for the selected number of markers...
     for (int i=0; i<numMarkers; i++) {
       // add the marker for detection
       nya.addARMarker(patternPath + "/" + patterns[i], 80);
       // turning on the debug output (it's all the stuff that spews out in the black box down the bottom)
       model.enableDebug();
      // model.translateToCenter();
       model.scale(0.9);
      // model.printModelInfo();
       noStroke();
   }
   }
   void draw()
   {
       if (cam.available()) {
       cam.read(); // read the cam image
       background(cam); // a background call is needed for correct display of the marker results
       image(cam, 0, 0, width, height); // display the image at the width and height of the sketch window
       // create a copy of the cam image at the resolution of the AR detection (otherwise nya.detect will throw an assertion error!)
       PImage cSmall = cam.get();
       cSmall.resize(arWidth, arHeight);
       nya.detect(cSmall); // detect markers in the image
       // set the AR perspective uniformly, this general point-of-view is the same for all markers
       nya.setARPerspective();
     
       drawimage();
       // reset to the default perspective
       perspective();
   }
   }
   void drawimage()
   {
    float time = millis() * 0.0001;
    nya.setARPerspective();
       lights();
   for (int i=0; i<numMarkers; i++) {
       // if the marker does NOT exist (the ! exlamation mark negates it)...
       if ((!nya.isExistMarker(i))) { continue; }
       //this will do nothing until the model material is turned off
     //  fill(255,0,255);
       setMatrix(nya.getMarkerMatrix(i));
     
       pushMatrix();
      //translate(width/2, height/2, -100);
      //rotateY( -3*sin(time)*2);
      model.draw();
       popMatrix();
   }
   
   }
   String[] loadPatternFilenames(String path) {
     File folder = new File(path);
     FilenameFilter pattFilter = new FilenameFilter() {
       public boolean accept(File dir, String name) {
         return name.toLowerCase().endsWith(".patt");
       }
     };
     return folder.list(pattFilter);
   }
   
   

Thanks for the help!