itowns
Version:
A JS/WebGL framework for 3D geospatial data visualization
146 lines (121 loc) • 5.8 kB
HTML
<html>
<head>
<title>Itowns - Split</title>
<style type="text/css">
#splitSlider {
position: absolute;
left: 50%;
top: 0px;
opacity: 0.7;
width: 6px;
height: 100%;
background-color: #667799;
z-index: 1000;
-moz-user-select: none;
-webkit-user-select: none;
-ms-user-select: none;
user-select: none;
}
#splitSlider:hover {
cursor: ew-resize;
}
</style>
<meta charset="UTF-8">
<link rel="stylesheet" type="text/css" href="css/example.css">
<link rel="stylesheet" type="text/css" href="css/LoadingScreen.css">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<script src="https://cdnjs.cloudflare.com/ajax/libs/dat-gui/0.7.6/dat.gui.min.js"></script>
</head>
<body>
<div id="viewerDiv"></div>
<div id="splitSlider"></div>
<script src="js/GUI/GuiTools.js"></script>
<script src="../dist/itowns.js"></script>
<script src="../dist/debug.js"></script>
<script src="js/GUI/LoadingScreen.js"></script>
<script type="text/javascript">
// # Simple Globe viewer
// Define initial camera position
var placement = {
coord: new itowns.Coordinates('EPSG:4326', 3.36, 51.22),
range: 480000,
}
// `viewerDiv` will contain iTowns' rendering area (`<canvas>`)
var viewerDiv = document.getElementById('viewerDiv');
// Instanciate iTowns GlobeView*
var view = new itowns.GlobeView(viewerDiv, placement);
var menuGlobe = new GuiTools('menuDiv', view);
var orthoLayer;
var osmLayer;
var splitSlider = document.getElementById('splitSlider');;
var splitPosition = 0.5 * window.innerWidth;
var xD = 0;
var s = 0.5;
setupLoadingScreen(viewerDiv, view);
// Add two imagery layers to the scene
// This layer is defined in a json file but it could be defined as a plain js
// object. See Layer* for more info.
const pOrtho = itowns.Fetcher.json('./layers/JSONLayers/Ortho.json').then(function _(config) {
config.source = new itowns.WMTSSource(config.source);
orthoLayer = new itowns.ColorLayer('Ortho', config);
view.addLayer(orthoLayer).then(menuGlobe.addLayerGUI.bind(menuGlobe));
});
const pOsm = itowns.Fetcher.json('./layers/JSONLayers/OPENSM.json').then(function _(config) {
config.source = new itowns.TMSSource(config.source);
osmLayer = new itowns.ColorLayer('OSM', config);
view.addLayer(osmLayer).then(menuGlobe.addLayerGUI.bind(menuGlobe));
});
// Add two elevation layers.
// These will deform iTowns globe geometry to represent terrain elevation.
function addElevationLayerFromConfig(config) {
config.source = new itowns.WMTSSource(config.source);
var layer = new itowns.ElevationLayer(config.id, config);
view.addLayer(layer);
}
itowns.Fetcher.json('./layers/JSONLayers/IGN_MNT_HIGHRES.json').then(addElevationLayerFromConfig);
itowns.Fetcher.json('./layers/JSONLayers/WORLD_DTM.json').then(addElevationLayerFromConfig);
// Slide handling
function splitSliderMove(evt) {
let posX = evt.clientX > 60000 ? 3 : evt.clientX;
posX = Math.max(3, posX);
posX = Math.min(posX, splitSlider.parentElement.offsetWidth - 3);
s = (posX - xD) / splitSlider.parentElement.offsetWidth;
splitSlider.style.left = (100.0 * s) + '%';
view.notifyChange();
}
function mouseDown(evt) {
xD = evt.clientX - splitSlider.offsetLeft;
window.addEventListener('mousemove', splitSliderMove, true);
}
function mouseUp() {
window.removeEventListener('mousemove', splitSliderMove, true);
}
splitSlider.addEventListener('mousedown', mouseDown, false);
window.addEventListener('mouseup', mouseUp, false);
// Rendering code
function splitRendering() {
const oldVisOrtho = orthoLayer.visible;
const oldVisOsm = osmLayer.visible;
var g = view.mainLoop.gfxEngine;
var r = g.renderer;
splitPosition = s * window.innerWidth;
r.setScissorTest(true);
// render ortho layer on the left
osmLayer.visible = false;
orthoLayer.visible = oldVisOrtho;
r.setScissor(0, 0, splitPosition + 2, window.innerHeight);
g.renderView(view);
// render osm layer on the right
orthoLayer.visible = false;
osmLayer.visible = oldVisOsm;
r.setScissor(splitPosition + 2, 0, window.innerWidth - splitPosition - 2, window.innerHeight);
g.renderView(view);
osmLayer.visible = oldVisOsm;
orthoLayer.visible = oldVisOrtho;
}
// Override default rendering method when color layers are ready
Promise.all([pOrtho, pOsm]).then(
function _() { view.render = splitRendering; }).catch(console.error);
</script>
</body>
</html>