3D Joy Division processing sketch code

3DJoyDivision.pde

import peasy.*;

PeasyCam cam;

ArrayList<Float> arr = new ArrayList<Float>(20);

void setup(){
  size(600,600, P3D);
  smooth(8);
  
  cam = new PeasyCam(this, 1000);
  cam.setMinimumDistance(50);
  cam.setMaximumDistance(1500);
  
  background(0);
  //noFill();
  fill(0);
  stroke(255);
}

void draw(){
  background(0);
  rotateX(-QUARTER_PI);
  float t = frameCount*0.05;
  float hwidth = width >> 1;
  for(int i=0;i<20;i++){
    beginShape();
    float c = 150;
    for(int e=0;e<c;e++){
      float x = e*width/c - hwidth;
      float xx = map(x,- hwidth, hwidth, -5, 5);
      float phi = x*0.02+t;
      float n = noise(cos(phi), sin(phi), i);
      vertex(x, n*f(xx)*200, i*25);
    }
    endShape();
  }
  if(t<TWO_PI) saveFrame("####.jpg");
}

float f(float x){
  if(x>=3 || x<=-3) return 0;
  return -map((1 + cos(x))/TWO_PI, 0, 0.31, 0, 1);
}