Location-based

                with NodeJS

SwissJS 2015

Stefanie Taepke

  • software engineer

 

  • from Bremen, Germany

  • living in Zurich, Switzerland

  • pokemon-fan

the idea

the pokémon world

gameplay adaption

analysis

privacy

ready vs. seek

paper prototype

development

map integration

// pokemon-icon
var pokemonIcon = L.icon({
    iconUrl: 'img/pokeball.png',
    iconSize: [30, 30],
    iconAnchor: [22, 94],
    popupAnchor: [-8, -96]
});
// map initialization
var layer = new L.StamenTileLayer('watercolor');
var map = new L.Map('map', {
	center: new L.LatLng(52.457680, 13.526831),
	zoom: zoomLevel,
	dragging: false,
	touchZoom: false,
	scrollWheelZoom: false,
	doubleClickZoom: false,
	zoomControl: false,
	keyboard: false
});
map.addLayer(layer);
// retrieve location
var node = req.query.location;

var latitude = node.loc_latitude;
var longitude = node.loc_longitude;

// create a rectangle
var longitude_a, longitude_b, latitude_a, latitude_b;
longitude_a = round(longitude);
longitude_b = round(longitude) + 0.1;
latitude_a = round(latitude);
latitude_b = round(latitude) + 0.1;

open street map

overpass api

  <node id="804111058" lat="51.9647176" lon="7.5985779">
    <tag k="highway" v="traffic_signals"/>
  </node>
  <node id="841325646" lat="51.9840667" lon="7.5886118">
    <tag k="highway" v="traffic_signals"/>
  </node>
  <node id="841325727" lat="51.9842469" lon="7.5885850">
    <tag k="bicycle" v="yes"/>
    <tag k="crossing" v="traffic_signals"/>
    <tag k="highway" v="traffic_signals"/>
  </node>
  <node id="846935796" lat="51.9736239" lon="7.5723296">
    <tag k="highway" v="traffic_signals"/>
  </node>
osmRead.parse({
    url: 'http://overpass-api.de/api/interpreter?data=node%28' 
            + latitude_a + '%2C' 
            + longitude_a + '%2C' 
            + latitude_b + '%2C' 
            + longitude_b 
            + '%29%5B%22natural%22%5D%3Bout%20body%3B%0A',
    format: 'xml',
    node: function(node){
	
        // do stuff with the location

    }
    
});

osm-read by Markus Peröbner (@marook)

osmRead.parse({
    url: 'http://overpass-api.de/api/interpreter?data=node%28' 
            + latitude_a + '%2C' 
            + longitude_a + '%2C' 
            + latitude_b + '%2C' 
            + longitude_b 
            + '%29%5B%22natural%22%5D%3Bout%20body%3B%0A',
    format: 'xml',
    node: function(node){
        if(doThis < 10){
	    doThis++;
	    Pokemon.checkArea(getTypesByNatural(node), function(err, pokemon) {
		    res.json({ location: node, pokemon: pokemon });
	    });
	}
    }
});

pokemon api

by Paul Hallett (@phalt)

PokemonSchema.statics.checkArea = function (naturalTypes, callback) {

    var rand = Math.floor(Math.random() * 151) + 1;
    getPokemonByPokedexId(rand, function(err, pokemon){
        for(var i = 0; i < pokemon.pokemonTypes.length; i++){
            for(var k = 0; k < naturalTypes.length; k++){
	        if(pokemon.pokemonTypes[i] == naturalTypes[k]){
                    console.log('match: ' + pokemon);
                    callback(null, pokemon);
                }
            }
        }		
    });
}

demo time

conclusion

thank you

Stefanie Taepke

Github @stefina

Twitter @Stefffi

github.com/stefina/pokemon

Location-based Pokémon

By stefffi

Location-based Pokémon

talk @swissjs 2015

  • 817
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