Files
openlayers/examples/chaikin.js
Tim Schaub 054af09032 Make code prettier
This updates ESLint and our shared eslint-config-openlayers to use Prettier.  Most formatting changes were automatically applied with this:

    npm run lint -- --fix

A few manual changes were required:

 * In `examples/offscreen-canvas.js`, the `//eslint-disable-line` comment needed to be moved to the appropriate line to disable the error about the `'worker-loader!./offscreen-canvas.worker.js'` import.
 * In `examples/webpack/exapmle-builder.js`, spaces could not be added after a couple `function`s for some reason.  While editing this, I reworked `ExampleBuilder` to be a class.
 * In `src/ol/format/WMSGetFeatureInfo.js`, the `// @ts-ignore` comment needed to be moved down one line so it applied to the `parsersNS` argument.
2020-04-06 12:54:09 -06:00

55 lines
1.3 KiB
JavaScript

import Draw from '../src/ol/interaction/Draw.js';
import Map from '../src/ol/Map.js';
import View from '../src/ol/View.js';
import {OSM, Vector as VectorSource} from '../src/ol/source.js';
import {Tile as TileLayer, Vector as VectorLayer} from '../src/ol/layer.js';
import smooth from 'chaikin-smooth';
function makeSmooth(path, numIterations) {
numIterations = Math.min(Math.max(numIterations, 1), 10);
while (numIterations > 0) {
path = smooth(path);
numIterations--;
}
return path;
}
const vectorSource = new VectorSource({});
const map = new Map({
layers: [
new TileLayer({
source: new OSM(),
opacity: 0.5,
}),
new VectorLayer({
source: vectorSource,
}),
],
target: 'map',
view: new View({
center: [1078373.595, 6871994.591],
zoom: 5,
}),
});
const shallSmoothen = document.getElementById('shall-smoothen');
const numIterations = document.getElementById('iterations');
const draw = new Draw({
source: vectorSource,
type: 'LineString',
});
map.addInteraction(draw);
draw.on('drawend', function (event) {
if (!shallSmoothen.checked) {
return;
}
const feat = event.feature;
const geometry = feat.getGeometry();
const coords = geometry.getCoordinates();
const smoothened = makeSmooth(coords, parseInt(numIterations.value, 10) || 5);
geometry.setCoordinates(smoothened);
});