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Minor optimization in bearing algorithm

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mossroy 2014-04-11 09:32:06 +02:00
parent 0367e60674
commit 29d64f59b4
1 changed files with 3 additions and 3 deletions
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6
www/js/lib/geometry.js
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@ -257,9 +257,9 @@ define(function(require) {
bearing: function() {
var lat1 = this.start.x * Math.PI / 180;
var lat2 = this.end.x * Math.PI / 180;
var lon1 = this.start.y * Math.PI / 180;
var lon2 = this.end.y * Math.PI / 180;
var dLon = lon2 - lon1;
var lon1 = this.start.y;
var lon2 = this.end.y;
var dLon = (lon2 - lon1) * Math.PI / 180;
var y = Math.sin(dLon) * Math.cos(lat2);
var x = Math.cos(lat1) * Math.sin(lat2) -
Math.sin(lat1) * Math.cos(lat2) * Math.cos(dLon);