Hi,
I post this cause it is another problem I have for Augmented Reality script I got : it shows no error but he camera view is blank when I run.

1. /**   
2.   example from nyar4psg modified to demonstrate NyARMultiBoard + NyARMultiBoardMarker by  Charl P. Botha <http://cpbotha.net/>
3. */
4. import codeanticode.gsvideo.*;
5. import jp.nyatla.nyar4psg.*;
6. import processing.opengl.*;
7. GSCapture cam;
8. NyARMultiBoard nya;
9. PFont font, font2d;
10. void setup() {
11.   size(640,480,P3D);
12.   colorMode(RGB, 100);
13.   font=createFont("FFScala", 32);
14.   font2d = createFont("FFScala", 10);
15.   cam=new GSCapture(this,width,height);
16.   String[] patts = {"patt.hiro", "patt.kanji"};
17.   double[] widths = {80,80};
18.   nya=new NyARMultiBoard(this,width,height,"camera_para.dat",patts,widths);
19.   print(nya.VERSION);
20.   nya.gsThreshold=120;
21.   nya.cfThreshold=0.4;
22. }
23. void drawMarkerPos(int[][] pos2d)
24. {
25.   textFont(font,10.0);
26.   stroke(100,0,0);
27.   fill(100,0,0);
28.  
29.   for(int i=0;i<4;i++){
30.     ellipse(pos2d[i][0], pos2d[i][1],5,5);
31.   }
32.   fill(0,0,0);
33.   for(int i=0;i<4;i++){
34.     text("("+pos2d[i][0]+","+pos2d[i][1]+")",pos2d[i][0],pos2d[i][1]);
35.   }
36. }
37. void draw() {
38.   if (cam.available() !=true) {
39.     return;
40.   }
41.   cam.read();
42.   hint(DISABLE_DEPTH_TEST);
43.   image(cam,0,0);
44.   hint(ENABLE_DEPTH_TEST);
45.   if (nya.detect(cam))
46.   {
47.     hint(DISABLE_DEPTH_TEST);
48.     for (int i=0; i < nya.markers.length; i++)
49.     {
50.       if (nya.markers[i].detected)
51.       {
52.         drawMarkerPos(nya.markers[i].pos2d);
53.       }
54.     }
55.   
56.     hint(ENABLE_DEPTH_TEST);
57.     for (int i=0; i < nya.markers.length; i++)
58.     {
59.       if (nya.markers[i].detected)
60.       {
61.        nya.markers[i].beginTransform();
62.        translate(0,0,20);
63.        if (i == 0)
64.        {
65.          stroke(255,200,0);
66.          box(40);
67.        }
68.        else
69.        {
70.          stroke(0,200,255);
71.          sphere(25);
72.        }
73.        nya.markers[i].endTransform();
74.       }
75.     }
76.    
77.   }
78.   hint(DISABLE_DEPTH_TEST);
79.   textFont(font2d,10.0);
80.   textMode(SCREEN);
81.   fill(100,100,0);
82.   text("frame rate = " + frameRate, 10, 10);
83.   textMode(MODEL);
84.   hint(ENABLE_DEPTH_TEST); 
85. }

does anyone have any idea why it's blank.

Thanks.
-poserpro