var next;

var fr;

​

var dA = 1;

var dB = 0.5;

var feed = 0.055;

var k = 0.062;

​

let writer;

let s;

let m;

let h;

let data = [];

​

function setup() {

  createCanvas(200, 200);

  fr = createP('');

  pixelDensity(1);

​

  grid = [];

  next = [];

  for (var x = 0; x < width; x++) {

    grid[x] = [];

    next[x] = [];

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

      grid[x][y] = {

        a: 1,

        b: 0

      };

      next[x][y] = {

        a: 1,

        b: 0

      };

    }

  }

  writer = createWriter('diffData.txt')

  m = minute();

  s = second();

  h = hour();

  data.push('start:' + h + ':' + m + ':' + s);

    saveButton = createButton('save');

  saveButton.mousePressed(saveFile);

​

      resetButton = createButton('reset');

  resetButton.mousePressed(resetFile);

  // for (var i = 45; i < 55; i++) {

  //   for (var j = 45; j < 55; j++) {

  //     grid[i][j].b = 1;

  //   }

  // }

    saveDataButton = createButton('save data');

  saveDataButton.mousePressed(saveData);

​

}

​

function mouseClicked(){

  if (mouseX > 0 && mouseX < width && mouseY > 0 && mouseY < height){

  s = second();

  m = minute();

  h = hour();

  data.push(h + ':' + m + ':' + s);

  }

}

​

function resetFile(){

  s = second();

  m = minute();

  h = hour();

  data.push('reset');

  for (var i = 0; i < width; i++){

    for (var j = 0; j < height; j++){

      grid[i][j].b = 0;

    }

  }

}

​

  function saveFile() {

  s = second();

  m = minute();

  h = hour();

  data.push('save');

  save('agg.jpg');

​

}

​

function saveData(){

  s = second();

  m = minute();

  h = hour();

  data.push('end: ' + h + ':' + m + ':' + s);

  for(let i = 0; i < data.length; i++){

    writer.print(data[i]);

  }

  writer.close();

  writer.clear();

}

​

function draw() {

  background(51);

​

  if (mouseIsPressed  && mouseX > 0 && mouseX < width && mouseY > 0 && mouseY < height) {

    for (var i = mouseX - 5; i < mouseX + 5; i++) {

      for (var j = mouseY - 5; j < mouseY + 5; j++){

        grid[i][j].b = 1;

      }

    }

  }

​

​

  for (var x = 1; x < width - 1; x++) {

    for (var y = 1; y < height - 1; y++) {

      var a = grid[x][y].a;

      var b = grid[x][y].b;

      next[x][y].a = a +

        (dA * laplaceA(x, y)) -

        (a * b * b) +

        (feed * (1 - a));

      next[x][y].b = b +

        (dB * laplaceB(x, y)) +

        (a * b * b) -

        ((k + feed) * b);

​

      next[x][y].a = constrain(next[x][y].a, 0, 1);

      next[x][y].b = constrain(next[x][y].b, 0, 1);

    }

  }

​

  loadPixels();

  for (var x = 0; x < width; x++) {

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

      var pix = (x + y * width) * 4;

      var a = next[x][y].a;

      var b = next[x][y].b;

      var c = floor((a - b) * 255);

      c = constrain(c, 0, 255);

      pixels[pix + 0] = c;

      pixels[pix + 1] = c;

      pixels[pix + 2] = c;

      pixels[pix + 3] = 255;

​

    }

  }

  updatePixels();

  swap();

  fr.html(floor(frameRate()));

​

}

​

function laplaceA(x, y) {

  var sumA = 0;

​

  sumA += grid[x][y].a * -1;

  sumA += grid[x - 1][y].a * 0.2;

  sumA += grid[x + 1][y].a * 0.2;

  sumA += grid[x][y + 1].a * 0.2;

  sumA += grid[x][y - 1].a * 0.2;

  sumA += grid[x - 1][y - 1].a * 0.05;

  sumA += grid[x - 1][y + 1].a * 0.05;

  sumA += grid[x + 1][y + 1].a * 0.05;

  sumA += grid[x + 1][y - 1].a * 0.05;

​

  return sumA;

}

​

function laplaceB(x, y) {

  var sumB = 0;

​

  sumB += grid[x][y].b * -1;

  sumB += grid[x - 1][y].b * 0.2;

  sumB += grid[x + 1][y].b * 0.2;

  sumB += grid[x][y + 1].b * 0.2;

  sumB += grid[x][y - 1].b * 0.2;

  sumB += grid[x - 1][y - 1].b * 0.05;

  sumB += grid[x - 1][y + 1].b * 0.05;

  sumB += grid[x + 1][y + 1].b * 0.05;

  sumB += grid[x + 1][y - 1].b * 0.05;

​

  return sumB;

}

​

​

function swap() {

  var temp = grid;

  grid = next;

  next = temp;

}