61 lines
1.2 KiB
JavaScript
61 lines
1.2 KiB
JavaScript
import Feature from '../src/ol/Feature.js';
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import Map from '../src/ol/Map.js';
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import View from '../src/ol/View.js';
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import LineString from '../src/ol/geom/LineString.js';
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import VectorLayer from '../src/ol/layer/Vector.js';
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import VectorSource from '../src/ol/source/Vector.js';
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import {Stroke, Style} from '../src/ol/style.js';
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const count = 10000;
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const features = new Array(count);
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let startPoint = [0, 0];
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let endPoint;
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let delta, deltaX, deltaY;
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let signX = 1;
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let signY = -1;
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// Create a square spiral.
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let i;
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for (i = 0; i < count; ++i) {
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delta = (i + 1) * 2500;
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if (i % 2 === 0) {
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signY *= -1;
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} else {
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signX *= -1;
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}
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deltaX = delta * signX;
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deltaY = delta * signY;
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endPoint = [startPoint[0] + deltaX, startPoint[1] + deltaY];
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features[i] = new Feature({
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'geometry': new LineString([startPoint, endPoint])
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});
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startPoint = endPoint;
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}
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const vector = new VectorLayer({
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source: new VectorSource({
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features: features,
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wrapX: false
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}),
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style: new Style({
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stroke: new Stroke({
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color: '#666666',
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width: 1
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})
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})
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});
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const view = new View({
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center: [0, 0],
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zoom: 0
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});
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const map = new Map({
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layers: [vector],
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target: 'map',
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view: view
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});
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