200402

let cap;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  cap = createCapture(VIDEO);

  cap.hide();

}

​

function draw() {

  background(240);

  let ratio = max(width/cap.width,height/cap.height);

  let lineHeight = height/20;

  let lineSpan = 10;

​

  for(let y = lineHeight; y <= height-lineHeight; y += lineHeight)

  {

    let pCol = 1;

    for(let x = 0; x <width; x += lineSpan)

    {

      let cx = cap.width/2 - (-width/2+x)/ratio;

      let cy = cap.height/2 - (height/2-y)/ratio;

      let col = cap.get(cx,cy);

      col = map(brightness(col),0,255,1,0);

      col = pow(col,4);

      let sw = map(col,1,0,lineHeight*0.5,0.01);

      sw += (noise(x+frameCount/10000,y)- 0.5)*lineHeight*0.05;

      let y1 = y + 30 * pCol;

      let y2 = y + 30 * col;

      strokeWeight(sw);

      line(x, y1,x + lineSpan, y2);

      pCol = col;

    }

  }

}