/**
 * brooklyn01
 *
 * image processing
 *
 * Matthew Conroy (www.madandmoonly.com)
 *
 **/
  
PImage img;
PImage edgeImg;

void setup (){
  size(530, 530);
  img = loadImage("bridge01.jpg"); // Load the original image
  img.loadPixels();
  edgeImg = createImage(img.width, img.height, RGB);
  noLoop();
}

void draw(){
float rand1=random(1);
float rand2=random(1);
float radstep=10+30*rand1*rand1;
float radfact=0.001+0.01*random(1);
float radshift=random(1)*PI;
float t=0;
float value1=0.0,value2=0.0;
float rbound=150+100*random(1);
float change=0.0;

float[] rotateArray= new float[40];

value1=1.0*random(1)-1.0*random(1);
value2=1.0*random(1)-1.0*random(1);

for(int i=0; i<40; ++i) {
    if ((i%2)==0) {
      change=change+value1;
    }
    else {
      change=change+value2;
    }
    rotateArray[i]=change;
}

for (int y = 0; y < img.height; y++) { 
  for (int x = 0; x < img.width; x++) {
    float xt=x-img.width*0.5;
    float yt=y-img.height*0.5;
    t=atan2(yt,xt);
    float r = sqrt(xt*xt+yt*yt);
    if (r<rbound) {
      t =t+rotateArray[floor(r/radstep)];
      //t = t+radstep*(floor(r/radstep))*radfact+radshift;
      } 
      
    
    
    //t=t+0.002;
    int xx = int((abs(img.width*0.5+r*cos(t))) % img.width);
    int yy = int((abs(img.height*0.5+r*sin(t))) % img.height);
    //xx=x;
    //yy=y;
    int pos = int((yy*img.width)+xx);
    float redval = red(img.pixels[pos]);
    float blueval=blue(img.pixels[pos]);
    float greenval=green(img.pixels[pos]);
    pos = y*img.width+x;
    edgeImg.pixels[pos]= color(redval,greenval,blueval);   
}
}
  
edgeImg.updatePixels();
image(edgeImg, 0, 0); // Draw the new image
}

void mousePressed() 
{
  redraw();
}