Partial layers

Illustrates the use of layers partially overlapping their parent Map.

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index.js

import TileWMS from 'ol/source/TileWMS.js';

import { MapControls } from 'three/examples/jsm/controls/MapControls.js';

import Extent from '@giro3d/giro3d/core/geographic/Extent.js';
import Instance from '@giro3d/giro3d/core/Instance.js';
import ColorLayer from '@giro3d/giro3d/core/layer/ColorLayer.js';
import TiledImageSource from '@giro3d/giro3d/sources/TiledImageSource.js';
import ElevationLayer from '@giro3d/giro3d/core/layer/ElevationLayer.js';
import BilFormat from '@giro3d/giro3d/formats/BilFormat.js';
import Map from '@giro3d/giro3d/entities/Map.js';
import Inspector from '@giro3d/giro3d/gui/Inspector.js';

// # Planar (EPSG:3946) viewer

// Defines projection that we will use (taken from https://epsg.io/3946, Proj4js section)
Instance.registerCRS(
    'EPSG:3946',
    '+proj=lcc +lat_1=45.25 +lat_2=46.75 +lat_0=46 +lon_0=3 +x_0=1700000 +y_0=5200000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs',
);

// Defines geographic extent: CRS, min/max X, min/max Y
const extent = new Extent('EPSG:3946', 1837816.94334, 1847692.32501, 5170036.4587, 5178412.82698);

// `viewerDiv` will contain Giro3D' rendering area (the canvas element)
const viewerDiv = document.getElementById('viewerDiv');

// Creates the Giro3D instance
const instance = new Instance(viewerDiv, { crs: 'EPSG:3946' });

// Adds the map that will contain the layers.
const map = new Map('planar', { extent, hillshading: true, backgroundColor: 'white' });
instance.add(map);

// Adds a WMS imagery layer
const colorSource = new TiledImageSource({
    source: new TileWMS({
        url: 'https://data.geopf.fr/wms-r',
        projection: 'EPSG:3946',
        params: {
            LAYERS: ['HR.ORTHOIMAGERY.ORTHOPHOTOS'],
            FORMAT: 'image/jpeg',
        },
    }),
});

// Define a smaller extent for the layer.
const layerExtent = extent.withMargin(-1000, -1000);

const colorLayer = new ColorLayer({
    name: 'wms_imagery',
    source: colorSource,
    extent: layerExtent,
});
map.addLayer(colorLayer);

// Adds a WMS elevation layer
const elevationSource = new TiledImageSource({
    source: new TileWMS({
        url: 'https://data.geopf.fr/wms-r',
        projection: 'EPSG:3946',
        crossOrigin: 'anonymous',
        params: {
            LAYERS: ['ELEVATION.ELEVATIONGRIDCOVERAGE.HIGHRES'],
            FORMAT: 'image/x-bil;bits=32',
        },
    }),
    format: new BilFormat(),
    noDataValue: -1000,
});

const elevationLayer = new ElevationLayer({
    name: 'wms_elevation',
    extent,
    source: elevationSource,
});

map.addLayer(elevationLayer);

// Sets the camera position
instance.camera.camera3D.position.set(extent.west(), extent.south(), 2000);

// Creates controls
const controls = new MapControls(instance.camera.camera3D, instance.domElement);

// Then looks at extent's center
controls.target = extent.centerAsVector3();
controls.saveState();

controls.enableDamping = true;
controls.dampingFactor = 0.2;
controls.maxPolarAngle = Math.PI / 2.3;

instance.useTHREEControls(controls);

Inspector.attach(document.getElementById('panelDiv'), instance);

index.html

<!doctype html>
<html lang="en">
    <head>
        <title>Partial layers</title>
        <meta charset="UTF-8" />
        <meta name="name" content="partial_layer" />
        <meta name="description" content="Illustrates the use of layers partially overlapping their parent Map." />
        <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"
        />

        
    </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>

        

        <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>

package.json

{
    "name": "partial_layer",
    "dependencies": {
        "@giro3d/giro3d": "0.37.3"
    },
    "devDependencies": {
        "vite": "^3.2.3"
    },
    "scripts": {
        "start": "vite",
        "build": "vite build"
    }
}