1605copypixels2

var capture, imageout;

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function setup() {

  createCanvas(windowWidth, windowHeight);

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  capture = createCapture(VIDEO); // this opens up the camera

  pixelDensity(1); // turns off oversampling ("retina display")

  capture.size(640, 480); // this is in pixels

  capture.hide(); // telling the browser to hide the camera so we can draw it ourselves

  imageout = createImage(640, 480); // create an empty picture

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}

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function draw() {

  background(0);

  capture.loadPixels();

  imageout.loadPixels();

  let mult = floor(map(mouseX,0,width,1,20));

  for(let i = 0;i<imageout.pixels.length;i+=4)

  {

    let iptr = i*mult%capture.pixels.length; // where in the input are we?

    imageout.pixels[i] = max(capture.pixels[iptr], capture.pixels[i]);

    imageout.pixels[i+1] = max(capture.pixels[iptr+1], capture.pixels[i+1]);

    imageout.pixels[i+2] = max(capture.pixels[iptr+2], capture.pixels[i+2]);

    imageout.pixels[i+3] = 255;

  }

  imageout.updatePixels();

  image(imageout, 0, 0, width, height);

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}

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