118 lines
3.1 KiB
JavaScript
118 lines
3.1 KiB
JavaScript
import _ol_Feature_ from '../src/ol/Feature.js';
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import Map from '../src/ol/Map.js';
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import _ol_View_ from '../src/ol/View.js';
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import Point from '../src/ol/geom/Point.js';
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import _ol_layer_Vector_ from '../src/ol/layer/Vector.js';
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import _ol_source_Vector_ from '../src/ol/source/Vector.js';
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import _ol_style_AtlasManager_ from '../src/ol/style/AtlasManager.js';
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import _ol_style_Circle_ from '../src/ol/style/Circle.js';
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import _ol_style_Fill_ from '../src/ol/style/Fill.js';
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import _ol_style_RegularShape_ from '../src/ol/style/RegularShape.js';
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import _ol_style_Stroke_ from '../src/ol/style/Stroke.js';
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import _ol_style_Style_ from '../src/ol/style/Style.js';
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var atlasManager = new _ol_style_AtlasManager_({
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// we increase the initial size so that all symbols fit into
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// a single atlas image
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initialSize: 512
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});
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var symbolInfo = [{
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opacity: 1.0,
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scale: 1.0,
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fillColor: 'rgba(255, 153, 0, 0.4)',
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strokeColor: 'rgba(255, 204, 0, 0.2)'
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}, {
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opacity: 0.75,
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scale: 1.25,
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fillColor: 'rgba(70, 80, 224, 0.4)',
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strokeColor: 'rgba(12, 21, 138, 0.2)'
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}, {
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opacity: 0.5,
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scale: 1.5,
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fillColor: 'rgba(66, 150, 79, 0.4)',
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strokeColor: 'rgba(20, 99, 32, 0.2)'
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}, {
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opacity: 1.0,
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scale: 1.0,
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fillColor: 'rgba(176, 61, 35, 0.4)',
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strokeColor: 'rgba(145, 43, 20, 0.2)'
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}];
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var radiuses = [3, 6, 9, 15, 19, 25];
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var symbolCount = symbolInfo.length * radiuses.length * 2;
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var symbols = [];
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var i, j;
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for (i = 0; i < symbolInfo.length; ++i) {
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var info = symbolInfo[i];
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for (j = 0; j < radiuses.length; ++j) {
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// circle symbol
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symbols.push(new _ol_style_Circle_({
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opacity: info.opacity,
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scale: info.scale,
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radius: radiuses[j],
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fill: new _ol_style_Fill_({
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color: info.fillColor
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}),
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stroke: new _ol_style_Stroke_({
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color: info.strokeColor,
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width: 1
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}),
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// by passing the atlas manager to the symbol,
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// the symbol will be added to an atlas
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atlasManager: atlasManager
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}));
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// star symbol
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symbols.push(new _ol_style_RegularShape_({
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points: 8,
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opacity: info.opacity,
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scale: info.scale,
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radius: radiuses[j],
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radius2: radiuses[j] * 0.7,
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angle: 1.4,
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fill: new _ol_style_Fill_({
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color: info.fillColor
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}),
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stroke: new _ol_style_Stroke_({
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color: info.strokeColor,
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width: 1
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}),
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atlasManager: atlasManager
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}));
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}
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}
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var featureCount = 50000;
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var features = new Array(featureCount);
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var feature, geometry;
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var e = 25000000;
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for (i = 0; i < featureCount; ++i) {
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geometry = new Point(
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[2 * e * Math.random() - e, 2 * e * Math.random() - e]);
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feature = new _ol_Feature_(geometry);
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feature.setStyle(
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new _ol_style_Style_({
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image: symbols[i % symbolCount]
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})
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);
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features[i] = feature;
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}
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var vectorSource = new _ol_source_Vector_({
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features: features
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});
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var vector = new _ol_layer_Vector_({
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source: vectorSource
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});
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var map = new Map({
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renderer: /** @type {Array<ol.renderer.Type>} */ (['webgl', 'canvas']),
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layers: [vector],
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target: document.getElementById('map'),
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view: new _ol_View_({
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center: [0, 0],
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zoom: 4
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})
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});
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