Leaflet smoothFactor test

Displays 12 spirals of different smoothFactor values.

by Bateman

HTML

<script src="http://cdn.leafletjs.com/leaflet-0.7.2/leaflet.js"></script>
<link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.7.2/leaflet.css">
<div id="map"></div>

CSS

html, body, #map {
    height: 100%;
    width:100%;
    padding:0px;
    margin:0px;
    background: white;
}

JavaScript

/////////////////////////////////////////////////////////////////////////////////////////////
//setting up the map//
/////////////////////////////////////////////////////////////////////////////////////////////

// set center coordinates
var centerlat = 34.05;
var centerlon = -118.25;

// set default zoom level
var zoomLevel = 10;

// initialize map
var map = L.map('map').setView([centerlat, centerlon], zoomLevel);

// set source for map tiles
ATTR = '&copy; <a href="http://openstreetmap.org">OpenStreetMap</a> contributors, ' +
'<a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a> | ' +
'&copy; <a href="http://cartodb.com/attributions">CartoDB</a>';

CDB_URL = 'http://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png';

// add tiles to map
L.tileLayer(CDB_URL, {attribution: ATTR}).addTo(map);

/////////////////////////////////////////////////////////////////////////////////////////////
//generating spirals and adding them to the map//
/////////////////////////////////////////////////////////////////////////////////////////////

var spiralsteps = 200;

//create 12 spirals of different smoothFactors, rotated about the map center point
for (var i = 0; i < 12; ++i) {
    var ang = Math.PI * i / 6;
    spiral = make_spiral(spiralsteps, [centerlat, centerlon], ang, 0.01, 0.05, 0.985);
    smoo = 0.1 * Math.pow(1.6185, i);
    L.polyline(spiral, {
        smoothFactor: smoo
    }).on('click', onSpiralClick).addTo(map);
}

//change popup content based on smoothing parameters
function onSpiralClick(e) {
    var rpts = 0;
    for (var i in e.target._parts) {
        rpts = rpts + e.target._parts[i].length;
    }
    e.target.bindPopup('smoothFactor : ' + Math.round(10 * e.target.options.smoothFactor) / 10 + '<br /> Rendering ' + rpts + ' / ' + e.target._originalPoints.length + ' original vertices.').openPopup(e.latlng);
}

/////////////////////////////////////////////////////////////////////////////////////////////
//functions for creating synthetic...