Auto retrato

/******************

Code by Vamoss

Original code link:

https://www.openprocessing.org/sketch/392918

​

Author links:

http://vamoss.com.br

http://twitter.com/vamoss

http://github.com/vamoss

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let img;

const vSpace = 20;

const hSpace = 15;

const amplitudeHeight = vSpace/2;

const precision = 1;

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function preload(){

  img = loadImage("photo_vertical.jpg");

}

​

function setup() {

  createCanvas(img.width, img.height);

  noFill();

  stroke(0);

} 

​

function draw() {

  background(255);  

  let frequency = -frameCount;

  for (let y = vSpace; y < height-vSpace*2; y+=vSpace) {

    beginShape();

    let x = 0;

    let prevAmplitude = 0;

    while (x < width) {

      let colorIntensity = brightness(img.get(x, y));

      let amplitude = 1-colorIntensity/255;

      for(let i=0; i<hSpace; i+=precision){

        let curAmpitude = lerp(prevAmplitude, amplitude, i/hSpace);

        x+=precision;

        frequency += curAmpitude;

        vertex(x, y+sin(frequency)*curAmpitude*amplitudeHeight);

      }

      prevAmplitude = amplitude;

    }

    endShape();

  }

}