comunes/todos-contra-el-fuego-web
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Adde noise and scale

Browse source
This commit is contained in:
vjrj 2017-12-04 17:44:08 +01:00
parent aced217a7d
commit 5bc9b0b040
12 changed files with 215 additions and 52 deletions
Download patch file Download diff file Expand all files Collapse all files

12
imports/api/Subscriptions/server/publications.js
View file

@ -1,10 +1,14 @@
import { Meteor } from 'meteor/meteor';
import Subscriptions from '../Subscriptions';
import Perlin from 'loms.perlin';
Perlin.seed(Math.random());
Meteor.publishTransformed('userSubsToFires', function() {
// https://en.wikipedia.org/wiki/Location_obfuscation
// https://en.wikipedia.org/wiki/Decimal_degrees#Precision
// https://gis.stackexchange.com/questions/27792/what-simple-effective-techniques-for-obfuscating-points-are-available
return Subscriptions.find().serverTransform(function(doc) {
var location = doc.location;
/* doc.lat = location.lat;
@ -13,6 +17,14 @@ Meteor.publishTransformed('userSubsToFires', function() {
doc.lat = Math.round(location.lat * 10) / 10;
doc.lon = Math.round(location.lon * 10) / 10;
}
// console.log(`[${doc.lat}, ${doc.lon}]`);
var noiseBase = Perlin.perlin2(doc.lat, doc.lon)
var noise = Math.abs(noiseBase/3);
// console.log(`Noise ${noise}, abs: ${Math.abs(noise)}`);
doc.lat += noise;
doc.lon += noise;
doc.distance += noiseBase;
// console.log(`with noise: [${doc.lat}, ${doc.lon}]`);
delete doc.chatId;
delete doc.geo;
delete doc.location;