Tilemap collision working but needs speeding up

node_modules/grunt/lib/util/namespace.js

@@ -0,0 +1,63 @@
+/*
+ * grunt
+ * http://gruntjs.com/
+ *
+ * Copyright (c) 2013 "Cowboy" Ben Alman
+ * Licensed under the MIT license.
+ * https://github.com/gruntjs/grunt/blob/master/LICENSE-MIT
+ */
+
+(function(exports) {
+
+  'use strict';
+
+  // Split strings on dot, but only if dot isn't preceded by a backslash. Since
+  // JavaScript doesn't support lookbehinds, use a placeholder for "\.", split
+  // on dot, then replace the placeholder character with a dot.
+  function getParts(str) {
+    return str.replace(/\\\./g, '\uffff').split('.').map(function(s) {
+      return s.replace(/\uffff/g, '.');
+    });
+  }
+
+  // Get the value of a deeply-nested property exist in an object.
+  exports.get = function(obj, parts, create) {
+    if (typeof parts === 'string') {
+      parts = getParts(parts);
+    }
+
+    var part;
+    while (typeof obj === 'object' && obj && parts.length) {
+      part = parts.shift();
+      if (!(part in obj) && create) {
+        obj[part] = {};
+      }
+      obj = obj[part];
+    }
+
+    return obj;
+  };
+
+  // Set a deeply-nested property in an object, creating intermediary objects
+  // as we go.
+  exports.set = function(obj, parts, value) {
+    parts = getParts(parts);
+
+    var prop = parts.pop();
+    obj = exports.get(obj, parts, true);
+    if (obj && typeof obj === 'object') {
+      return (obj[prop] = value);
+    }
+  };
+
+  // Does a deeply-nested property exist in an object?
+  exports.exists = function(obj, parts) {
+    parts = getParts(parts);
+
+    var prop = parts.pop();
+    obj = exports.get(obj, parts);
+
+    return typeof obj === 'object' && obj && prop in obj;
+  };
+
+}(typeof exports === 'object' && exports || this));