Illustrates various types of opacity (map, map background, and layer)
import { Vector3 } from 'three';
import { MapControls } from 'three/examples/jsm/controls/MapControls.js';
import { Fill, Style } from 'ol/style.js';
import GeoJSON from 'ol/format/GeoJSON.js';
import VectorSource from '@giro3d/giro3d/sources/VectorSource.js';
import ColorLayer from '@giro3d/giro3d/core/layer/ColorLayer.js';
import Extent from '@giro3d/giro3d/core/geographic/Extent.js';
import Instance from '@giro3d/giro3d/core/Instance.js';
import Map from '@giro3d/giro3d/entities/Map.js';
import Inspector from '@giro3d/giro3d/gui/Inspector.js';
// Defines geographic extent: CRS, min/max X, min/max Y
const extent = new Extent(
'EPSG:3857',
-4553934 - 1000000,
-4553934 + 1000000,
-3910697 - 1000000,
-3910697 + 1000000,
);
// `viewerDiv` will contain Giro3D' rendering area (the canvas element)
const viewerDiv = document.getElementById('viewerDiv');
// Creates a Giro3D instance
const instance = new Instance(viewerDiv, {
crs: extent.crs(),
renderer: {
clearColor: false,
},
});
// Instanciates camera
instance.camera.camera3D.position.set(-4553934, -3910697, 4600000);
// Instanciates controls
const controls = new MapControls(instance.camera.camera3D, instance.domElement);
controls.target = new Vector3(-4553934, -3910696, 0);
controls.enableDamping = true;
controls.dampingFactor = 0.25;
instance.useTHREEControls(controls);
const map = new Map('map', { extent, backgroundColor: 'green' });
instance.add(map);
const rectangle = {
type: 'Feature',
geometry: {
type: 'Polygon',
coordinates: [
[
[-46, -30],
[-41, -30],
[-41, -35],
[-46, -35],
[-46, -30],
],
],
},
};
const triangle = {
type: 'Feature',
geometry: {
type: 'Polygon',
coordinates: [
[
[-45, -31],
[-39, -31],
[-39, -35],
[-45, -31],
],
],
},
};
function makeGeoJSONLayer(name, geojson, color) {
const style = new Style({
fill: new Fill({
color,
}),
});
const source = new VectorSource({
data: geojson,
format: new GeoJSON(),
style,
dataProjection: 'EPSG:4326',
});
const layer = new ColorLayer({
name,
extent,
source,
});
return layer;
}
const redSquare = makeGeoJSONLayer('redSquare', rectangle, '#aa0000');
const blueTriangle = makeGeoJSONLayer('blueTriangle', triangle, '#0000aa');
map.addLayer(redSquare);
map.addLayer(blueTriangle);
Inspector.attach(document.getElementById('panelDiv'), instance);
instance.notifyChange(map);
// GUI
function bindSlider(id, action) {
const slider = document.getElementById(id);
slider.oninput = () => {
action(slider.value);
instance.notifyChange(map);
};
}
bindSlider('map-opacity', v => {
map.opacity = v;
});
bindSlider('bg-opacity', v => {
map.materialOptions.backgroundOpacity = v;
});
bindSlider('blue-opacity', v => {
blueTriangle.opacity = v;
});
bindSlider('red-opacity', v => {
redSquare.opacity = v;
});<!doctype html>
<html lang="en">
<head>
<title>Types of opacity</title>
<meta charset="UTF-8" />
<meta name="name" content="transparent_map_bg" />
<meta name="description" content="Illustrates various types of opacity (map, map background, and layer)" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<link rel="icon" href="https://giro3d.org/images/favicon.svg" />
<link href="https://giro3d.org/assets/bootstrap-custom.css" rel="stylesheet" />
<script src="https://giro3d.org/assets/bootstrap.bundle.min.js"></script>
<link
rel="stylesheet"
type="text/css"
href="https://giro3d.org/latest/css/example.css"
/>
<style>
#viewerDiv canvas {
background-image: linear-gradient(45deg, #aaaaaa 25%, transparent 25%),
linear-gradient(-45deg, #aaaaaa 25%, transparent 25%),
linear-gradient(45deg, transparent 75%, #aaaaaa 75%),
linear-gradient(-45deg, transparent 75%, #aaaaaa 75%);
background-size: 20px 20px;
background-position:
0 0,
0 10px,
10px -10px,
-10px 0px;
}
</style>
</head>
<body>
<div id="viewerDiv" class="m-0 p-0 w-100 h-100"></div>
<div id="panelDiv" class="position-absolute top-0 start-0 mh-100 overflow-auto"></div>
<div class="side-pane-with-status-bar">
<div class="card">
<div class="card-body">
<!-- Map global opacity -->
<label for="map-opacity" class="form-label">Map opacity</label>
<div class="input-group">
<input
type="range"
min="0"
max="1"
value="1"
step="0.05"
class="form-range"
id="map-opacity"
autocomplete="off"
/>
</div>
<div class="my-2"></div>
<!-- Map background opacity -->
<label for="bg-opacity" class="form-label">Map background opacity</label>
<div class="input-group">
<input
type="range"
min="0"
max="1"
value="1"
step="0.05"
class="form-range"
id="bg-opacity"
autocomplete="off"
/>
</div>
<div class="my-2"></div>
<!-- Blue layer opacity -->
<label for="blue-opacity" class="form-label">Blue layer opacity</label>
<div class="input-group">
<input
type="range"
min="0"
max="1"
value="1"
step="0.05"
class="form-range"
id="blue-opacity"
autocomplete="off"
/>
</div>
<div class="my-2"></div>
<!-- Red layer opacity -->
<label for="red-opacity" class="form-label">Red layer opacity</label>
<div class="input-group">
<input
type="range"
min="0"
max="1"
value="1"
step="0.05"
class="form-range"
id="red-opacity"
autocomplete="off"
/>
</div>
</div>
</div>
</div>
<script type="module" src="index.js"></script>
<script>
/* activate popovers */
const popoverTriggerList = [].slice.call(
document.querySelectorAll('[data-bs-toggle="popover"]'),
);
popoverTriggerList.map(
// bootstrap is used as script in the template, disable warning about undef
// eslint-disable-next-line no-undef
popoverTriggerEl =>
new bootstrap.Popover(popoverTriggerEl, {
trigger: 'hover',
placement: 'left',
content: document.getElementById(
popoverTriggerEl.getAttribute('data-bs-content'),
).innerHTML,
html: true,
}),
);
</script>
</body>
</html>{
"name": "transparent_map_bg",
"dependencies": {
"@giro3d/giro3d": "0.37.3"
},
"devDependencies": {
"vite": "^3.2.3"
},
"scripts": {
"start": "vite",
"build": "vite build"
}
}