requirebin sketch

index.js

var observer = require('continuous-observer')
var cave = require('cave-automata-2d')
var fill = require('ndarray-fill')
var zero = require('zeros')
var raf = require('raf')

var canvas = document.createElement('canvas')
var ctx = canvas.getContext('2d')

// Set up the controls, so that we can control
// the camera with the arrow keys or WASD.
var controls = require('kb-controls')(document.body, {
  '<up>': 'up',
  '<down>': 'down',
  '<left>': 'left',
  '<right>': 'right',
  'W': 'up',
  'S': 'down',
  'A': 'left',
  'D': 'right'
})

var field = require('ndarray-continuous')({
  shape: [28, 28], // Make each chunk 28 elements high/wide
  getter: getter
})

// This method generates a new chunk for
// the continuous ndarray if it's needed.
//
// Here we're creating an empty ndarray, then
// filling it up with cave-automata-2d. We're
// also inverting it so that we can get links
// between the chunks without much extra work.
function getter(position, done) {
  var array = zero(this.shape)
  cave(array)(10)
  invert(array)
  return done(null, array)
}

function invert(array) {
  return fill(array, function(x, y) {
    return 1 - array.get(x, y)
  })
}

// We'll use continuous-observer to add and remove
// chunks as needed, based on the camera's position
// each frame.
var moveTo = observer(field)

var camera = {
  x: 0,
  y: 0
}

raf().on('data', function() {
  if (controls.up)    camera.y -= 0.25
  if (controls.down)  camera.y += 0.25
  if (controls.left)  camera.x -= 0.25
  if (controls.right) camera.x += 0.25

  moveTo([camera.x, camera.y])

  ctx.fillStyle = '#f2f2f2'
  ctx.fillRect(0, 0, canvas.width, canvas.height)

  // Iterate over each chunk in the continuous-ndarray,
  // drawing each one according to their position on the
  // grid.
  field.each(function(chunk) {
    var pos = chunk.position
    var w = chunk.shape[0]
    var h = chunk.shape[1]

    var offset = {
      x: chunk.position[0] * chunk.shape[0],
      y: chunk.position[1] * chunk.shape[1]
    }

    ctx.fillStyle = '#af3'
    for (var x = 0; x < w; x += 1) {
      for (var y = 0; y < h; y += 1) {
        if (chunk.get(x, y) > 0) {
          ctx.fillRect(
            (offset.x + x - camera.x) * 40,
            (offset.y + y - camera.y) * 40,
            40,
            40
          )
        }
      }
    }

  })
})

document.body.style.margin =
document.body.style.padding = 0
document.body.style.overflow = 'hidden'
document.body.appendChild(canvas)

canvas.width = window.innerWidth
canvas.height = window.innerHeight

minified.js

function getter(e,t){var r=zero(this.shape);return cave(r)(10),invert(r),t(null,r)}function invert(e){return fill(e,function(t,r){return 1-e.get(t,r)})}require=function e(t,r,n){function i(a,s){if(!r[a]){if(!t[a]){var u="function"==typeof require&&require;if(!s&&u)return u(a,!0);if(o)return o(a,!0);throw Error("Cannot find module '"+a+"'")}var l=r[a]={exports:{}};t[a][0].call(l.exports,function(e){var r=t[a][1][e];return i(r?r:e)},l,l.exports,e,t,r,n)}return r[a].exports}for(var o="function"==typeof require&&require,a=0;n.length>a;a++)i(n[a]);return i}({1:[function(e,t){function r(){this._events=this._events||{},this._maxListeners=this._maxListeners||void 0}function n(e){return"function"==typeof e}function i(e){return"number"==typeof e}function o(e){return"object"==typeof e&&null!==e}function a(e){return void 0===e}t.exports=r,r.EventEmitter=r,r.prototype._events=void 0,r.prototype._maxListeners=void 0,r.defaultMaxListeners=10,r.prototype.setMaxListeners=function(e){if(!i(e)||0>e||isNaN(e))throw TypeError("n must be a positive number");return this._maxListeners=e,this},r.prototype.emit=function(e){var t,r,i,s,u,l;if(this._events||(this._events={}),"error"===e&&(!this._events.error||o(this._events.error)&&!this._events.error.length))throw t=arguments[1],t instanceof Error?t:TypeError('Uncaught, unspecified "error" event.');if(r=this._events[e],a(r))return!1;if(n(r))switch(arguments.length){case 1:r.call(this);break;case 2:r.call(this,arguments[1]);break;case 3:r.call(this,arguments[1],arguments[2]);break;default:for(i=arguments.length,s=Array(i-1),u=1;i>u;u++)s[u-1]=arguments[u];r.apply(this,s)}else if(o(r)){for(i=arguments.length,s=Array(i-1),u=1;i>u;u++)s[u-1]=arguments[u];for(l=r.slice(),i=l.length,u=0;i>u;u++)l[u].apply(this,s)}return!0},r.prototype.addListener=function(e,t){var i;if(!n(t))throw TypeError("listener must be a function");if(this._events||(this._events={}),this._events.newListener&&this.emit("newListener",e,n(t.listener)?t.listener:t),this._events[e]?o(this._events[e])?this._events[e].push(t):this._events[e]=[this._events[e],t]:this._events[e]=t,o(this._events[e])&&!this._events[e].warned){var i;i=a(this._maxListeners)?r.defaultMaxListeners:this._maxListeners,i&&i>0&&this._events[e].length>i&&(this._events[e].warned=!0,console.error("(node) warning: possible EventEmitter memory leak detected. %d listeners added. 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this;if(!this._events.removeListener)return 0===arguments.length?this._events={}:this._events[e]&&delete this._events[e],this;if(0===arguments.length){for(t in this._events)"removeListener"!==t&&this.removeAllListeners(t);return this.removeAllListeners("removeListener"),this._events={},this}if(r=this._events[e],n(r))this.removeListener(e,r);else for(;r.length;)this.removeListener(e,r[r.length-1]);return delete this._events[e],this},r.prototype.listeners=function(e){var t;return t=this._events&&this._events[e]?n(this._events[e])?[this._events[e]]:this._events[e].slice():[]},r.listenerCount=function(e,t){var r;return r=e._events&&e._events[t]?n(e._events[t])?1:e._events[t].length:0}},{}],hinVIu:[function(e,t){var r=e("ever"),n=e("vkey"),i=Math.max;t.exports=function(e,t,o){function a(){for(var e in t)o[t[e]]=0,g[e]=1}function s(e){return function(){return a(),y=e,this}}function u(e){return function(t){y&&e(t)}}function l(e,r){return function(n){var 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e[t]||"Event"}}()},{"./init.json":5,"./types.json":6,events:1}],5:[function(e,t){t.exports={initEvent:["type","canBubble","cancelable"],initUIEvent:["type","canBubble","cancelable","view","detail"],initMouseEvent:["type","canBubble","cancelable","view","detail","screenX","screenY","clientX","clientY","ctrlKey","altKey","shiftKey","metaKey","button","relatedTarget"],initMutationEvent:["type","canBubble","cancelable","relatedNode","prevValue","newValue","attrName","attrChange"]}},{}],6:[function(e,t){t.exports={MouseEvent:["click","mousedown","mouseup","mouseover","mousemove","mouseout"],KeyBoardEvent:["keydown","keyup","keypress"],MutationEvent:["DOMSubtreeModified","DOMNodeInserted","DOMNodeRemoved","DOMNodeRemovedFromDocument","DOMNodeInsertedIntoDocument","DOMAttrModified","DOMCharacterDataModified"],HTMLEvent:["load","unload","abort","error","select","change","submit","reset","focus","blur","resize","scroll"],UIEvent:["DOMFocusIn","DOMFocusOut","DOMActivate"]}},{}],7:[function(e,t){var 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package.json

{
  "name": "requirebin-sketch",
  "version": "1.0.0",
  "dependencies": {
    "kb-controls": "0.1.1",
    "ndarray-fill": "0.1.0",
    "zeros": "0.0.0",
    "raf": "0.0.3",
    "continuous-observer": "0.2.0",
    "ndarray-continuous": "0.4.2",
    "cave-automata-2d": "0.3.1"
  }
}

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requirebin.md

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