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index.html
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index.html
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<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>
3D GeoJSON - Maptime AMS #6
</title>
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<link rel="stylesheet" href="css/skeleton.css">
<link rel="stylesheet" href="css/normalize.css">
<link rel="stylesheet" href="css/style.css">
<link rel="stylesheet" href="css/codemirror.css">
<script src="js/lib/d3.v3.min.js" charset="utf-8"></script>
<script src="js/lib/topojson.v1.min.js"></script>
<script src="js/lib/three.min.js"></script>
<script src="js/lib/TrackballControls.js"></script>
<script src="js/lib/Detector.js"></script>
<script src="js/lib/turf.min.js"></script>
<script src="js/codemirror.js"></script>
<script src="js/javascript.js"></script>
<script src="js/geo.js"></script>
</head>
<body>
<div id="sidebar">
<header>
<h1>Maptime Amsterdam #6: GeoJSON 3D</h1>
<span>See <a href="https://github.com/maptime-ams/geojson-3d">GitHub</a> for more information!</span>
<input type="text" id="url" placeholder="URL pointing to GeoJSON or TopoJSON file"></input>
</header>
<div class="textareas">
<textarea id="color">
</textarea>
<textarea id="height">
</textarea>
</div>
<div class="buttons">
<button id="submit">Yes! Go!</button>
</div>
</div>
<div id="webgl"></div>
<script>
var disableHashChange = false;
var cmColor;
var cmHeight;
// Store downloaded JSON in variable
var json;
var defaults = {
url: 'data/municipalities.json',
color:
'function(d) {\n' +
' return Math.random() * 16777216;\n' +
'}',
height:
'function(d) {\n' +
' return Math.random()\n' +
'}'
};
var latest = {
url: null,
color: null,
height: null
};
var materials = {
phong: function(color) {
return new THREE.MeshPhongMaterial({
color: color, side: THREE.DoubleSide
// phong : new THREE.MeshPhongMaterial({ color: 0xffffff, specular: 0x000000, shininess: 60, shading: THREE.SmoothShading, transparent:true }),
});
},
meshLambert: function(color) {
return new THREE.MeshLambertMaterial({
color: color,
specular: 0x009900,
shininess: 30,
shading: THREE.SmoothShading,
transparent:true
});
},
meshWireFrame: function(color) {
return new THREE.MeshBasicMaterial({
color: color,
specular: 0x009900,
shininess: 30,
shading: THREE.SmoothShading,
wireframe:true,
transparent:true
});
},
meshBasic: function(color) {
return new THREE.MeshBasicMaterial({
color: color,
specular: 0x009900,
shininess: 30,
shading: THREE.SmoothShading,
transparent: true
});
}
};
if (!Detector.webgl) {
Detector.addGetWebGLMessage();
}
var container;
var camera, controls, scene, renderer;
var light, spotLight, ambientLight;
var cross;
function onWindowResize() {
camera.aspect = container.clientWidth / container.clientHeight;
camera.updateProjectionMatrix();
renderer.setSize(container.clientWidth, container.clientHeight);
controls.handleResize();
render();
}
function animate() {
requestAnimationFrame(animate);
controls.update();
}
function render() {
renderer.render(scene, camera);
}
function init() {
container = document.getElementById('webgl');
camera = new THREE.PerspectiveCamera( 70, container.clientWidth / container.clientHeight, 0.1, 10000);
camera.position.z = Math.min(container.clientWidth, container.clientHeight);
controls = new THREE.TrackballControls(camera, container);
controls.rotateSpeed = 1.0;
controls.zoomSpeed = 1.2;
controls.panSpeed = 0.8;
controls.noZoom = false;
controls.noPan = false;
controls.staticMoving = true;
controls.dynamicDampingFactor = 0.3;
controls.keys = [65, 83, 68];
controls.addEventListener('change', render);
// World
scene = new THREE.Scene();
// Lights
light = new THREE.DirectionalLight(0xffffff);
light.position.set(1, 1, 1);
scene.add(light);
spotLight = new THREE.SpotLight(0xffffff);
spotLight.position.set(-1000, -1000, 1000);
spotLight.castShadow = true;
scene.add(spotLight);
ambientLight = new THREE.AmbientLight(0x333333);
scene.add(ambientLight);
// Renderer
renderer = new THREE.WebGLRenderer({antialias: true});
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize(container.clientWidth, container.clientHeight);
container.appendChild(renderer.domElement);
// Shadows
renderer.shadowMapEnabled = true;
renderer.shadowMapSoft = true;
renderer.shadowCameraNear = 1;
renderer.shadowCameraFar = camera.far;
renderer.shadowCameraFov = 60;
renderer.shadowMapBias = 0.0025;
renderer.shadowMapDarkness = 0.5;
renderer.shadowMapWidth = 1024;
renderer.shadowMapHeight = 1024;
window.addEventListener('resize', onWindowResize, false);
onWindowResize();
render();
update();
}
function clearGroups() {
if (json) {
if (json.type === 'FeatureCollection') {
json.features.forEach(function(feature) {
scene.remove(feature._group);
});
} else if (json.type === 'Topology') {
Object.keys(json.objects).forEach(function(key) {
json.objects[key].geometries.forEach(function(object) {
scene.remove(object._group);
});
});
}
}
render();
}
function update() {
clearGroups();
var width = container.clientWidth;
var height = container.clientHeight;
// Read url from url textarea
var url = document.getElementById('url').value
d3.json(url, function(data) {
json = data;
var functions = {};
try {
var colorFunctionString = cmColor.getValue();
functions.color = eval('(' + colorFunctionString + ')');
} catch(err) {
console.log(err);
functions.color = eval('(' + defaults.color + ')');
}
try {
var heightFunctionString = cmHeight.getValue();
functions.height = eval('(' + heightFunctionString + ')');
} catch(err) {
console.log(err);
functions.height = eval('(' + defaults.height + ')');
}
if (json.type === 'FeatureCollection') {
var projection = getProjection(json, width, height);
json.features.forEach(function(feature) {
var group = addFeature(feature, projection, functions);
feature._group = group;
});
} else if (json.type === 'Topology') {
var geojson = topojson.merge(json, json.objects[Object.keys(json.objects)[0]].geometries);
var projection = getProjection(geojson, width, height);
Object.keys(json.objects).forEach(function(key) {
json.objects[key].geometries.forEach(function(object) {
var feature = topojson.feature(json, object);
var group = addFeature(feature, projection, functions);
object._group = group;
});
});
} else {
console.log('This tutorial only renders TopoJSON and GeoJSON FeatureCollections')
}
render();
});
}
function addShape(group, shape, extrudeSettings, material, color, x, y, z, rx, ry, rz, s) {
var geometry = new THREE.ExtrudeGeometry(shape, extrudeSettings);
var mesh = new THREE.Mesh(geometry, materials[material](color));
// Add shadows
mesh.castShadow = true;
mesh.receiveShadow = true;
mesh.position.set(x, y, z);
mesh.rotation.set(rx, ry, rz);
mesh.scale.set(s, s, s);
group.add(mesh);
}
function addFeature(feature, projection, functions) {
var group = new THREE.Group();
scene.add(group);
var color;
var amount;
try {
color = functions.color(feature.properties);
} catch(err) {
console.log(err);
}
try {
amount = functions.height(feature.properties);
} catch(err) {
console.log(err);
}
var extrudeSettings = {
amount: amount,
bevelEnabled: false
};
var material = 'phong';
if (feature.geometry.type === 'Polygon') {
var shape = createPolygonShape(feature.geometry.coordinates, projection);
addShape(group, shape, extrudeSettings, material, color, 0, 0, amount, Math.PI, 0, 0, 1);
} else if (feature.geometry.type === 'MultiPolygon') {
feature.geometry.coordinates.forEach(function(polygon) {
var shape = createPolygonShape(polygon, projection);
addShape(group, shape, extrudeSettings, material, color, 0, 0, amount, Math.PI, 0, 0, 1);
});
} else {
console.log('This tutorial only renders Polygons and MultiPolygons')
}
return group;
}
// Set textareas to contain default functions
document.getElementById('color').value = defaults.color;
document.getElementById('height').value = defaults.height;
document.getElementById('url').value = defaults.url;
// Initialize CodeMirror:
cmColor = CodeMirror.fromTextArea(document.getElementById('color'), {
lineNumbers: true,
mode: 'text/javascript'
});
cmHeight = CodeMirror.fromTextArea(document.getElementById('height'), {
lineNumbers: true,
mode: 'text/javascript'
});
d3.selectAll("#submit").on('click', function() {
// Check input!
latest = {
url: document.getElementById('url').value,
color: cmColor.getValue(),
height: cmHeight.getValue()
};
update();
updateHash();
});
function parseHash(hash) {
params = {};
hash.split("&").forEach(function(param) {
if (param.indexOf("=") > -1) {
var kv = param.split("=");
params[kv[0]] = decodeURIComponent(kv[1]);
}
});
// TODO: check params before setting
if (params.url) {
latest.url = params.url;
document.getElementById('url').value = params.url;
}
if (params.color) {
latest.color = params.color;
cmColor.setValue(params.color);
}
if (params.height) {
latest.height = params.height;
cmHeight.setValue(params.height);
}
}
function updateHash() {
disableHashChange = true;
var params = {};
if (latest.url) {
params.url = encodeURIComponent(latest.url);
}
if (latest.color) {
params.color = encodeURIComponent(latest.color);
}
if (latest.height) {
params.height = encodeURIComponent(latest.height);
}
var items = [];
for (param in params) {
items.push(param + '=' + params[param]);
}
location.hash = items.join('&');
setTimeout(function(){
disableHashChange = false;
}, 1000);
}
window.onhashchange = function() {
if (!disableHashChange) {
parseHash(location.hash.substring(1))
}
};
if (location.hash) {
parseHash(location.hash.substring(1));
}
// Initalize WebGL!
init();
animate();
</script>
</body>
</html>