抽象的なノイズ

/**
* abstract noise
*
* @author aa_debdeb
* @date 2016/11/30
*/ 

int layerNum = 10;
color[] layerColors;

void setup(){
  size(500, 500);
  mousePressed();
}

void mousePressed(){
  layerColors = new color[layerNum + 1];
  for(int i = 0; i < layerNum + 1; i++){
    layerColors[i] = color(random(255), random(255), random(255));
  }
  
  PVector offset = new PVector(random(10000), random(10000));
  for(int w = 0; w < width; w++){
    for(int h = 0; h < height; h++){
      float v = mapToQuad(noise(w * 0.005 + offset.x, h * 0.005 + offset.y));
      int layer = int(v * layerNum);
      stroke(lerpColor(layerColors[layer], layerColors[layer + 1], v * layerNum - layer));
      point(w, h);
    }
  }
}

float mapToQuad(float v){
  if(v < 0.5){
    return 2.0 * v * v;
  } else {
    return -2.0 * (v - 1.0) * (v - 1.0) + 1.0;
  }
}

void draw(){

}