?? points.js
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/* Copyright (c) 2004-2006, The Dojo Foundation All Rights Reserved. Licensed under the Academic Free License version 2.1 or above OR the modified BSD license. For more information on Dojo licensing, see: http://dojotoolkit.org/community/licensing.shtml*/dojo.provide("dojo.math.points");dojo.require("dojo.math");// TODO: add a Point class?dojo.math.points = { translate: function(a, b) { if( a.length != b.length ) { dojo.raise("dojo.math.translate: points not same size (a:[" + a + "], b:[" + b + "])"); } var c = new Array(a.length); for(var i = 0; i < a.length; i++) { c[i] = a[i] + b[i]; } return c; }, midpoint: function(a, b) { if( a.length != b.length ) { dojo.raise("dojo.math.midpoint: points not same size (a:[" + a + "], b:[" + b + "])"); } var c = new Array(a.length); for(var i = 0; i < a.length; i++) { c[i] = (a[i] + b[i]) / 2; } return c; }, invert: function(a) { var b = new Array(a.length); for(var i = 0; i < a.length; i++) { b[i] = -a[i]; } return b; }, distance: function(a, b) { return Math.sqrt(Math.pow(b[0]-a[0], 2) + Math.pow(b[1]-a[1], 2)); }};
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