78 lines
1.5 KiB
JavaScript
78 lines
1.5 KiB
JavaScript
import Map from '../../../../src/ol/Map.js';
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import MultiPolygon from '../../../../src/ol/geom/MultiPolygon.js';
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import Stroke from '../../../../src/ol/style/Stroke.js';
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import Style from '../../../../src/ol/style/Style.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 {getVectorContext} from '../../../../src/ol/render.js';
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const source = new XYZ({
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url: '/data/tiles/osm/{z}/{x}/{y}.png',
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transition: 0,
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});
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const layer = new TileLayer({
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source: source,
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});
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const geometry = new MultiPolygon([
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[
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[
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[-80, -40],
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[-40, 0],
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[-80, 40],
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[-120, 0],
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[-80, -40],
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],
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],
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[
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[
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[80, -40],
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[120, 0],
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[80, 40],
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[40, 0],
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[80, -40],
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],
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],
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]).transform('EPSG:4326', 'EPSG:3857');
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const style = new Style({
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stroke: new Stroke({
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width: 2,
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color: 'blue',
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}),
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});
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layer.on('prerender', function (event) {
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const context = event.context;
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context.save();
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const vectorContext = getVectorContext(event);
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vectorContext.setStyle(style);
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vectorContext.drawGeometry(geometry);
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context.clip();
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});
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layer.on('postrender', function (event) {
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const context = event.context;
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context.restore();
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const vectorContext = getVectorContext(event);
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vectorContext.setStyle(style);
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vectorContext.drawGeometry(geometry);
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});
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new Map({
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pixelRatio: 1,
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target: 'map',
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layers: [layer],
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view: new View({
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center: [0, 0],
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zoom: 0,
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}),
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});
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render();
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