Hello all. I have recently taken interest in AR so, since I had already worked with processing a while back I decided to give this library a try. At first I tried the nyartoolkit 1.3.1 version for processing 2.0 but I always had a "Catch an exception!" error on every example I ran. Since psg 2.0 is so recent I tried version 1.5.1 instead. But on every single example I always get stuck on the line that calls the camera calibration file. That would be line 12 on the example below.

The error I get is "NullPointerException"

Exception in thread "Animation Thread" java.lang.NullPointerException
    at jp.nyatla.nyar4psg.SingleNyIdMarker.<init>(SingleNyIdMarker.java:120)
    at sketch_130605a.setup(sketch_130605a.java:39)
    at processing.core.PApplet.handleDraw(Unknown Source)
    at processing.core.PApplet.run(Unknown Source)
    at java.lang.Thread.run(Thread.java:662)

I have changed the name of the library folder from nyar4psg-1.3.1 to NyAR4psg (I read somewhere it could be a problem). Other than that I have tried every tutorial I could find with no luck so it must be something simple that I'm doing wrong. Any ideas? :S

1. import processing.video.*;
   import jp.nyatla.nyar4psg.*;
   
   PFont font=createFont("FFScala", 32);
   Capture cam;
   SingleNyIdMarker nya;
   
   void setup() {
     size(640,480,P3D);
     colorMode(RGB, 100);
     cam=new Capture(this,width,height);
     nya=new SingleNyIdMarker(this,width,height,"camera_para.dat"); //SingleMarker検出インスタンス
     nya.setIdMarkerSize(80);
     print(nya.VERSION); //バージョンの表示
   }
   int c=0;
   void draw() {
     c++;
     if (cam.available() !=true) {
       return;
     }
     background(255);
     cam.read();
     nya.drawBackground(cam);//frustumを考慮した背景描画
     switch(nya.detect(cam)){
     case SingleNyIdMarker.ST_NOMARKER:
       return;
     case SingleNyIdMarker.ST_NEWMARKER:
       println("Marker found.");
       return;
     case SingleNyIdMarker.ST_UPDATEMARKER:
       break;
     case SingleNyIdMarker.ST_REMOVEMARKER:
       println("Marker removed.");
       return;
     default:
       return;
     }
     nya.beginTransform();//マーカ座標系に設定
     {
       setMatrix(nya.getMarkerMatrix());//マーカ姿勢をセット
       drawBox();
       drawMarkerXYPos();
     }
     nya.endTransform();  //マーカ座標系を終了
     drawMarkerPatt();
     drawVertex();
    
   }
   void drawBox()
   {
     pushMatrix();
     fill(0);
     stroke(255,200,0);
     translate(0,0,20);
     box(40);
     noFill();
     translate(0,0,-20);
     rect(-40,-40,80,80);
     popMatrix();
   }
   
   //この関数は、マーカパターンを描画します。
   void drawMarkerPatt()
   {
     PImage p=nya.pickupMarkerImage(40,40,-40,40,-40,-40,40,-40,100,100);
     image(p,0,0);
   }
   
   //この関数は、マーカ平面上の点を描画します。
   void drawMarkerXYPos()
   {
     pushMatrix();
       PVector pos=nya.screen2MarkerCoordSystem(mouseX,mouseY);
       translate(pos.x,pos.y,0);
       noFill();
       stroke(0,0,100);
       ellipse(0,0,20-c%20,20-c%20);
     popMatrix();
   }
   
   //この関数は、マーカ頂点の情報を描画します。
   void drawVertex()
   {
     PVector[] i_v=nya.getMarkerVertex2D();
     textFont(font,10.0);
     stroke(100,0,0);
     for(int i=0;i<4;i++){
       fill(100,0,0);
       ellipse(i_v[i].x,i_v[i].y,6,6);
       fill(0,0,0);
       text("("+i_v[i].x+","+i_v[i].y+")",i_v[i].x,i_v[i].y);
     }
   }