Ekokumppanit/Bicyclesim
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This commit is contained in:
Juho Teperi
2013-05-07 11:24:49 +03:00
parent e19e4ad352
commit 9a97a998b6
14 changed files with 98 additions and 120 deletions
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12
server/lib/maps.js
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@@ -15,13 +15,13 @@ if (typeof Number.prototype.toDeg == 'undefined') {
};
}
function computeDistance(from, to) {
computeDistance = function computeDistance(from, to) {
// Equirectangular approximation, should be enough as distances are small
var R = 6371000; // km
var x = (to[1].toRad() - from[1].toRad()) * Math.cos((from[0].toRad() + to[0].toRad()) / 2);
var y = (from[0].toRad() - to[0].toRad());
return Math.sqrt(x * x + y * y) * R;
}
};
function computeInitialBearing(from, to) {
var dLat = (to[0] - from[0]).toRad();
@@ -34,12 +34,12 @@ function computeInitialBearing(from, to) {
return (Math.atan2(y, x).toDeg() + 360) % 360;
}
function computeFinalBearing(from, to) {
computeFinalBearing = function computeFinalBearing(from, to) {
return (computeInitialBearing(to, from) + 180) % 360;
}
};
// Rest are copied from: https://github.com/moshen/node-googlemaps/blob/master/lib/googlemaps.js
function createEncodedPolyline(points) {
createEncodedPolyline = function createEncodedPolyline(points) {
// Dear maintainer:
//
// Once you are done trying to 'optimize' this routine,
@@ -70,7 +70,7 @@ function createEncodedPolyline(points) {
encoded_points += encodeSignedNumber(dlat) + encodeSignedNumber(dlng);
}
return encoded_points;
}
};
function encodeNumber(num) {
var encodeString = "";