the code for exporting contour to pdf in processing

import blobDetection.*;

import peasy.*;

PeasyCam cam;

import processing.pdf.*;

boolean record = false;

PImage img;

float levels = 35;                    // number of contours

float factor = 1;                     // scale factor

float elevation = 55;                 // total height of the 3d model

float colorStart =  0;                // Starting degree of color range in HSB Mode (0-360)

float colorRange =  100;              // color range / can also be negative

// Array of BlobDetection Instances

BlobDetection[] theBlobDetection = new BlobDetection[int(levels)];

void setup() {

  size(1000,800,P3D);  

  img = loadImage("dsa.gif");           // heightmap (about 250×250px)

  cam = new PeasyCam(this,200);

  colorMode(HSB,360,100,100);

  //Computing Blobs with different thresholds 

  for (int i=0 ; i<levels ; i++) {

    theBlobDetection[i] = new BlobDetection(img.width, img.height);

    theBlobDetection[i].setThreshold(i/levels);

    theBlobDetection[i].computeBlobs(img.pixels);

  }

}

void draw() {

if (record) {

beginRaw(PDF, "save_file_name.pdf");

}{ 

  background(0);

  translate(-img.width*factor/2,-img.height*factor/2);

  for (int i=0 ; i<levels ; i++) {

    translate(0,0,elevation/levels);

    drawContours(i);

  }

}

void drawContours(int i) {

  Blob b;

  EdgeVertex eA,eB;

  for (int n=0 ; n<theBlobDetection[i].getBlobNb() ; n++) {

    b=theBlobDetection[i].getBlob(n);

    if (b!=null) {

      stroke((i/levels*colorRange)+colorStart,0,100);      // coloring the contours

      for (int m=0;m<b.getEdgeNb();m++) {

        eA = b.getEdgeVertexA(m);

        eB = b.getEdgeVertexB(m);

        if (eA !=null && eB !=null)

          line(

          eA.x*img.width*factor, eA.y*img.height*factor, 

          eB.x*img.width*factor, eB.y*img.height*factor 

            );

      }

    }

  }

}

}

if (record) {

endRaw();

record = false;

}

}

void keyPressed() {

record = true;

}

}

the code for exporting contour to pdf in processing

but it seems it have error