Stress test a map with many color layers.

Parameters
100%
index.js
import { Color, MathUtils } from 'three';
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 Map from '@giro3d/giro3d/entities/Map.js';
import Inspector from '@giro3d/giro3d/gui/Inspector.js';
import DebugSource from '@giro3d/giro3d/sources/DebugSource.js';

// Defines geographic extent: CRS, min/max X, min/max Y
const extent = new Extent(
    'EPSG:3857',
    -20037508.342789244,
    20037508.342789244,
    -20037508.342789244,
    20037508.342789244,
);

// `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: 0x0a3b59,
    },
});

// Instanciates camera
instance.camera.camera3D.position.set(0, 0, 25000000);

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

instance.useTHREEControls(controls);

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

function bindSlider(name, callback) {
    const slider = document.getElementById(name);
    slider.oninput = function oninput() {
        callback(slider.value);
    };
}

function bindToggle(name, callback) {
    const toggle = document.getElementById(name);
    toggle.oninput = () => {
        const state = toggle.checked;
        callback(state);
    };
}

function createColorLayer() {
    const source = new DebugSource({
        color: new Color().setHSL(Math.random(), 0.5, 0.5),
        extent,
        subdivisions: MathUtils.randInt(1, 4),
    });

    return new ColorLayer({ extent, source, showTileBorders: true });
}

let layerCount = 8;
let forceTextureAtlases = false;
/** @type {Map} */
let map = null;

function buildMapAndLayers() {
    if (map) {
        for (const layer of map.getLayers()) {
            map.removeLayer(layer, { disposeLayer: true });
        }
        instance.remove(map);
    }

    // Creates a map that will contain the layer
    map = new Map('map', { extent, forceTextureAtlases });

    instance.add(map);

    for (let i = 0; i < layerCount; i++) {
        map.addLayer(createColorLayer());
    }
}

bindSlider('layerCount', count => {
    layerCount = count;
});

bindToggle('forceAtlases', force => {
    forceTextureAtlases = force;
});

document.getElementById('build').onclick = () => buildMapAndLayers();
index.html
<!doctype html>
<html lang="en">
    <head>
        <title>Color layer stress test</title>
        <meta charset="UTF-8" />
        <meta name="name" content="layer_stress_test" />
        <meta name="description" content="Stress test a map with many color layers." />
        <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>

        <div class="side-pane-with-status-bar">
            <div class="card">
                <div class="card-header">Parameters</div>

                <div class="card-body">
                    <div class="mb-3">
                        <label for="layerCount" class="form-label">Color layer count</label>
                        <div class="input-group">
                            <input
                                type="number"
                                min="0"
                                max="100"
                                autocomplete="off"
                                value="8"
                                class="form-control"
                                id="layerCount"
                            />
                        </div>
                    </div>

                    <div class="form-check form-switch mb-3">
                        <input
                            class="form-check-input"
                            type="checkbox"
                            autocomplete="off"
                            role="switch"
                            id="forceAtlases"
                        />
                        <label class="form-check-label" for="forceAtlases">Force texture atlases</label>
                    </div>

                    <button type="button" class="btn btn-primary" id="build">Generate</button>
                </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>
package.json
{
    "name": "layer_stress_test",
    "dependencies": {
        "@giro3d/giro3d": "0.37.2"
    },
    "devDependencies": {
        "vite": "^3.2.3"
    },
    "scripts": {
        "start": "vite",
        "build": "vite build"
    }
}