40 lines
746 B
JavaScript
40 lines
746 B
JavaScript
function VectorDistance(a, b)
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{
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var dx = a[0] - b[0];
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var dz = a[1] - b[1];
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return Math.sqrt(dx*dx + dz*dz);
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}
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function SquareVectorDistance(a, b)//A sqrtless vector calculator, to see if that improves speed at all.
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{
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var dx = a[0] - b[0];
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var dz = a[1] - b[1];
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return (dx*dx + dz*dz);
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}
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function MemoizeInit(obj)
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{
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obj._memoizeCache = {};
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}
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function Memoize(funcname, func)
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{
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return function() {
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var args = funcname + '|' + Array.prototype.join.call(arguments, '|');
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if (args in this._memoizeCache)
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return this._memoizeCache[args];
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var ret = func.apply(this, arguments);
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this._memoizeCache[args] = ret;
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return ret;
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};
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}
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function ShallowClone(obj)
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{
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var ret = {};
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for (var k in obj)
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ret[k] = obj[k];
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return ret;
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}
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