itowns
Version:
A JS/WebGL framework for 3D geospatial data visualization
145 lines (121 loc) • 5.71 kB
HTML
<html>
<head>
<title>Itowns - Split</title>
<style type="text/css">
#splitSlider {
position: absolute;
left: 50%;
top: 0px;
width: 4px;
height: 100%;
background-color: #666666;
}
#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="../dist/itowns.js"></script>
<script src="js/GUI/LoadingScreen.js"></script>
<script type="text/javascript">
// # Simple Globe viewer
// Define initial camera position
var positionOnGlobe = { longitude: 3.36, latitude: 51.22, altitude: 480000 };
// `viewerDiv` will contain iTowns' rendering area (`<canvas>`)
var viewerDiv = document.getElementById('viewerDiv');
// Instanciate iTowns GlobeView*
var view = new itowns.GlobeView(viewerDiv, positionOnGlobe);
var promises = [];
var orthoLayer;
var osmLayer;
var splitSlider;
var splitPosition;
var xD;
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.
function addColorLayerFromConfig(config) {
var layer = new itowns.ColorLayer(config.id, config);
return view.addLayer(layer);
}
promises.push(itowns.Fetcher.json('./layers/JSONLayers/Ortho.json')
.then(function _(c) {
c.source = new itowns.WMTSSource(c.source);
return c;
})
.then(addColorLayerFromConfig)
.then(function _(l) { orthoLayer = l; }));
promises.push(itowns.Fetcher.json('./layers/JSONLayers/OPENSM.json')
.then(function _(c) {
c.source = new itowns.TMSSource(c.source);
return c;
})
.then(addColorLayerFromConfig)
.then(function _(l) { osmLayer = l; }));
// 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/WORLD_DTM.json').then(addElevationLayerFromConfig);
itowns.Fetcher.json('./layers/JSONLayers/IGN_MNT_HIGHRES.json').then(addElevationLayerFromConfig);
// Slide handling
splitPosition = 0.5 * window.innerWidth;
xD = 0;
function splitSliderMove(evt) {
var s = (evt.clientX - xD) / splitSlider.parentElement.offsetWidth;
splitSlider.style.left = (100.0 * s) + '%';
splitPosition = s * window.innerWidth;
view.notifyChange();
}
function mouseDown(evt) {
xD = evt.clientX - splitSlider.offsetLeft;
window.addEventListener('mousemove', splitSliderMove, true);
}
function mouseUp() {
window.removeEventListener('mousemove', splitSliderMove, true);
}
function changeLayerVisibility(orthoVisible, osmVisible) {
view.scene.traverse(function _(obj) {
if (obj.material && obj.material.visible && obj.material.getLayer) {
var ortho = obj.material.getLayer(orthoLayer.id);
var osm = obj.material.getLayer(osmLayer.id);
if (ortho) ortho.visible = orthoVisible;
if (osm) osm.visible = osmVisible;
}
});
}
splitSlider = document.getElementById('splitSlider');
document.getElementById('splitSlider').addEventListener('mousedown', mouseDown, false);
window.addEventListener('mouseup', mouseUp, false);
// Rendering code
function splitRendering() {
var g = view.mainLoop.gfxEngine;
var r = g.renderer;
r.setScissorTest(true);
// render ortho layer on the left
changeLayerVisibility(true, false);
r.setScissor(0, 0, splitPosition + 2, window.innerHeight);
g.renderView(view);
// render osm layer on the right
changeLayerVisibility(false, true);
r.setScissor(splitPosition + 2, 0, window.innerWidth - splitPosition - 2, window.innerHeight);
g.renderView(view);
}
// Override default rendering method when color layers are ready
Promise.all(promises).then(
function _() { view.render = splitRendering; }).catch(console.error);
</script>
</body>
</html>