cb6995d71a
* Replace Math.log2 with ol/math.log2 * TypedArray.from() browser compatibility fallback * listen for input and change events for range
65 lines
1.7 KiB
JavaScript
65 lines
1.7 KiB
JavaScript
import Map from '../src/ol/Map.js';
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import OSM from '../src/ol/source/OSM.js';
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import TileLayer from '../src/ol/layer/Tile.js';
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import View from '../src/ol/View.js';
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import XYZ from '../src/ol/source/XYZ.js';
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import {getRenderPixel} from '../src/ol/render.js';
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const osm = new TileLayer({
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source: new OSM(),
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});
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const key = 'get_your_own_D6rA4zTHduk6KOKTXzGB';
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const attributions =
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'<a href="https://www.maptiler.com/copyright/" target="_blank">© MapTiler</a> ' +
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'<a href="https://www.openstreetmap.org/copyright" target="_blank">© OpenStreetMap contributors</a>';
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const aerial = new TileLayer({
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source: new XYZ({
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attributions: attributions,
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url: 'https://api.maptiler.com/tiles/satellite/{z}/{x}/{y}.jpg?key=' + key,
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maxZoom: 20,
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}),
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});
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const map = new Map({
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layers: [osm, aerial],
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target: 'map',
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view: new View({
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center: [0, 0],
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zoom: 2,
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}),
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});
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const swipe = document.getElementById('swipe');
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aerial.on('prerender', function (event) {
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const ctx = event.context;
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const mapSize = map.getSize();
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const width = mapSize[0] * (swipe.value / 100);
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const tl = getRenderPixel(event, [width, 0]);
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const tr = getRenderPixel(event, [mapSize[0], 0]);
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const bl = getRenderPixel(event, [width, mapSize[1]]);
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const br = getRenderPixel(event, mapSize);
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ctx.save();
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ctx.beginPath();
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ctx.moveTo(tl[0], tl[1]);
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ctx.lineTo(bl[0], bl[1]);
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ctx.lineTo(br[0], br[1]);
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ctx.lineTo(tr[0], tr[1]);
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ctx.closePath();
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ctx.clip();
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});
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aerial.on('postrender', function (event) {
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const ctx = event.context;
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ctx.restore();
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});
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const listener = function () {
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map.render();
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};
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swipe.addEventListener('input', listener);
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swipe.addEventListener('change', listener);
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