// http://codingtra.in

// http://patreon.com/codingtrain

// Code for: https://youtu.be/IKB1hWWedMk

​

// Edited by SacrificeProductions

​

var cols, rows;

var scl = 15;

var w;

var h;

​

var terrain = [];

​

var video;

​

var shift = 0;

var low;

var high;

​

function setup() {

  createCanvas(windowWidth, windowHeight, WEBGL);

  w = width;

  h = height;

  cols = w / scl;

  rows = h / scl;

​

  video = createCapture(VIDEO);

​

  for (var x = 0; x < cols; x++) {

    terrain[x] = [];

    for (var y = 0; y < rows; y++) {

      terrain[x][y] = 0; //specify a default value for now

    }

  }

}

​

function draw() {

  video.size(w / scl, h / scl);

  background(0);

​

  video.loadPixels();

  loadPixels();

  shift -= 0.03;

  var yOffset = shift;

  //var yOffset = 0;

  for (var y = 0; y < video.height; y++) {

    var xOffset = 0;

    for (var x = 0; x < video.width; x++) {

      var index = (video.width - x - 1 + y * video.width) * 4;

      var r = video.pixels[index + 0];

      var g = video.pixels[index + 1];

      var b = video.pixels[index + 2];

      var brightness = (r + b + g) / 3;

      terrain[x][y] = map(brightness, 0, 255, -50, 100) + map(noise(xOffset, yOffset), 0, 1, -50, 20);

      xOffset += 0.1;      

    }

    yOffset += 0.1;

  }

​

  background(0, 29, 95);

  translate(0, 50);

  rotateX(map(mouseY, 0, height, PI/2, -PI/8));

  noFill();

  stroke(255, 0, 253);

  translate(-w / 2, -h / 2);

  for (y = 0; y < rows -2; y++) {

    beginShape(TRIANGLE_STRIP);

    for (x = 0; x < cols -1; x++) {

      vertex(x * scl, y * scl, terrain[x][y]);

      vertex(x * scl, (y + 1) * scl, terrain[x][y + 1]);

    }

    endShape();

  }

}