Fil/.block

## .block
license: mit

## README.md

      
    Raw
  

              README.md
            
          
    P5 example from https://p5js.org/examples/simulate-wolfram-ca.html
Built with blockbuilder.org

  
## index.html
<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="//cdnjs.cloudflare.com/ajax/libs/p5.js/0.5.6/p5.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
  </style>
</head>

<body>
  <script>

var w = 10;
// An array of 0s and 1s
var cells;

 // We arbitrarily start with just the middle cell having a state of "1"
var generation = 0;

// An array to store the ruleset, for example {0,1,1,0,1,1,0,1}
var ruleset = [0, 1, 0, 1, 1, 0, 1, 0];

function setup() {
  createCanvas(640, 400);
  cells = Array(floor(width/w));
  for (var i = 0; i < cells.length; i++) {
    cells[i] = 0;
  }
  cells[cells.length/2] = 1;

}

function draw() {
  for (var i = 0; i < cells.length; i++) {
    if (cells[i] === 1) {
      fill(200);
    } else {
      fill(51);
      noStroke();
      rect(i*w, generation*w, w, w);
    }
  }
  if (generation < height/w) {
    generate();
  }
}

// The process of creating the new generation
function generate() {
  // First we create an empty array for the new values
  var nextgen = Array(cells.length);
  // For every spot, determine new state by examing current state, and neighbor states
  // Ignore edges that only have one neighor
  for (var i = 1; i < cells.length-1; i++) {
    var left   = cells[i-1];   // Left neighbor state
    var me     = cells[i];     // Current state
    var right  = cells[i+1];   // Right neighbor state
    nextgen[i] = rules(left, me, right); // Compute next generation state based on ruleset
  }
  // The current generation is the new generation
  cells = nextgen;
  generation++;
}


// Implementing the Wolfram rules
// Could be improved and made more concise, but here we can explicitly see what is going on for each case
function rules(a, b, c) {
  if (a == 1 && b == 1 && c == 1) return ruleset[0];
  if (a == 1 && b == 1 && c == 0) return ruleset[1];
  if (a == 1 && b == 0 && c == 1) return ruleset[2];
  if (a == 1 && b == 0 && c == 0) return ruleset[3];
  if (a == 0 && b == 1 && c == 1) return ruleset[4];
  if (a == 0 && b == 1 && c == 0) return ruleset[5];
  if (a == 0 && b == 0 && c == 1) return ruleset[6];
  if (a == 0 && b == 0 && c == 0) return ruleset[7];
  return 0;
}

  </script>
</body>

## thumbnail.png

      
    Raw
  

              thumbnail.png
	<!DOCTYPE html>
	<head>
	<meta charset="utf-8">
	<script src="//cdnjs.cloudflare.com/ajax/libs/p5.js/0.5.6/p5.js"></script>
	<style>
	body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
	</style>
	</head>

	<body>
	<script>

	var w = 10;
	// An array of 0s and 1s
	var cells;

	// We arbitrarily start with just the middle cell having a state of "1"
	var generation = 0;

	// An array to store the ruleset, for example {0,1,1,0,1,1,0,1}
	var ruleset = [0, 1, 0, 1, 1, 0, 1, 0];

	function setup() {
	createCanvas(640, 400);
	cells = Array(floor(width/w));
	for (var i = 0; i < cells.length; i++) {
	cells[i] = 0;
	}
	cells[cells.length/2] = 1;

	}

	function draw() {
	for (var i = 0; i < cells.length; i++) {
	if (cells[i] === 1) {
	fill(200);
	} else {
	fill(51);
	noStroke();
	rect(iw, generationw, w, w);
	}
	}
	if (generation < height/w) {
	generate();
	}
	}

	// The process of creating the new generation
	function generate() {
	// First we create an empty array for the new values
	var nextgen = Array(cells.length);
	// For every spot, determine new state by examing current state, and neighbor states
	// Ignore edges that only have one neighor
	for (var i = 1; i < cells.length-1; i++) {
	var left = cells[i-1]; // Left neighbor state
	var me = cells[i]; // Current state
	var right = cells[i+1]; // Right neighbor state
	nextgen[i] = rules(left, me, right); // Compute next generation state based on ruleset
	}
	// The current generation is the new generation
	cells = nextgen;
	generation++;
	}


	// Implementing the Wolfram rules
	// Could be improved and made more concise, but here we can explicitly see what is going on for each case
	function rules(a, b, c) {
	if (a == 1 && b == 1 && c == 1) return ruleset[0];
	if (a == 1 && b == 1 && c == 0) return ruleset[1];
	if (a == 1 && b == 0 && c == 1) return ruleset[2];
	if (a == 1 && b == 0 && c == 0) return ruleset[3];
	if (a == 0 && b == 1 && c == 1) return ruleset[4];
	if (a == 0 && b == 1 && c == 0) return ruleset[5];
	if (a == 0 && b == 0 && c == 1) return ruleset[6];
	if (a == 0 && b == 0 && c == 0) return ruleset[7];
	return 0;
	}

	</script>
	</body>
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