//4 way colour vectoriser by Aaron Steed
int w=100; //width of display
int h=100; //height of display
AIExport ai;
dstore[] pix = new dstore[w*h];
int i;
void setup(){
  for (int ip=0;ip<w*h;ip++){
    pix[ip] = new dstore();
  }
  i=0;
  size (w,h);
  background (255);
  //image to be scanned (place in data folder, low colour .gifs are best owing to scan refusing isolated pixels)
  BImage scan = loadImage ("Image.gif");
  image (scan,0,0);
  ai = new AIExport( this, 1 );
  ai.toggleContinuousRecording();
  //ai.turnTransparencyOff();
  //ai.setLineWeight( 0.25 );
   stroke( 0,0,255 );
   //fill(0); 
   //rect(0,0,10,10); // testing square for bugs
}
void loop(){
  ai.run();
  if (i<pixels.length){
  if (pixels[i]!=#FFFFFF){escan(i);}
    println(pixels.length-i);
    i++;
  }
  if (i==pixels.length){
    ai.toggleContinuousRecording();
    i++;
    println("done");
  }
}//loop;
void escan(int pt){
  color ct = pixels[pt];
  int x1=(pt)%width;
  int y1=pt/width;
  for (int d=0; d<4; d++){
    int x2=x1;
    int y2=y1;
    pix[x2+y2*width].d[d]=true;
  while ((d==0) && (x2<width-1) && (pixels[(x2+1)+y2*width]==ct) && !(pix[(x2+1)+y2*width].d[d])){x2++;pix[x2+y2*width].d[d]=true;}
  while ((d==1) && (x2<width-1) && (y2<height-1) && (pixels[(x2+1)+(y2+1)*width]==ct) && !(pix[(x2+1)+(y2+1)*width].d[d])){x2++; y2++;pix[x2+y2*width].d[d]=true;}
  while ((d==2) && (y2<height-1) && (pixels[x2+(y2+1)*width]==ct) && !(pix[x2+(y2+1)*width].d[d])){y2++;pix[x2+y2*width].d[d]=true;}
  while ((d==3) && (x2>0) && (y2<height-1) && (pixels[(x2-1)+(y2+1)*width]==ct) && !(pix[(x2-1)+(y2+1)*width].d[d])){x2--; y2++;pix[x2+y2*width].d[d]=true;}
    if (x2 != x1 || y2 != y1) {
      ai.ai_stroke (ct);
      ai.ai_line (x1,y1,x2,y2);
    }
  }//for;
}//escan;

class dstore{
  boolean [] d=new boolean [4];
  dstore (){
    for (int id=0;id<4;id++){
      d[id]=false;
    }
  }//dstore;
}//class;