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Regular Shapes

Example of some Regular Shape styles.

This example shows how several regular shapes or symbols (representing x, cross, star, triangle and square) can be created.

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index.html<!DOCTYPE html>
<html lang="en">
  <head>
    <title>Regular Shapes</title>
    <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
    <style>
      .map {
        width: 100%;
        height:400px;
      }
    </style>
  </head>
  <body>
    <div id="map" class="map"></div>
    <script src="index.js"></script>
  </body>
</html>
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index.jsimport 'ol/ol.css';
import Feature from 'ol/Feature';
import Map from 'ol/Map';
import View from 'ol/View';
import Point from 'ol/geom/Point';
import VectorLayer from 'ol/layer/Vector';
import VectorSource from 'ol/source/Vector';
import {Fill, RegularShape, Stroke, Style} from 'ol/style';


var stroke = new Stroke({color: 'black', width: 2});
var fill = new Fill({color: 'red'});

var styles = {
  'square': new Style({
    image: new RegularShape({
      fill: fill,
      stroke: stroke,
      points: 4,
      radius: 10,
      angle: Math.PI / 4
    })
  }),
  'triangle': new Style({
    image: new RegularShape({
      fill: fill,
      stroke: stroke,
      points: 3,
      radius: 10,
      rotation: Math.PI / 4,
      angle: 0
    })
  }),
  'star': new Style({
    image: new RegularShape({
      fill: fill,
      stroke: stroke,
      points: 5,
      radius: 10,
      radius2: 4,
      angle: 0
    })
  }),
  'cross': new Style({
    image: new RegularShape({
      fill: fill,
      stroke: stroke,
      points: 4,
      radius: 10,
      radius2: 0,
      angle: 0
    })
  }),
  'x': new Style({
    image: new RegularShape({
      fill: fill,
      stroke: stroke,
      points: 4,
      radius: 10,
      radius2: 0,
      angle: Math.PI / 4
    })
  })
};


var styleKeys = ['x', 'cross', 'star', 'triangle', 'square'];
var count = 250;
var features = new Array(count);
var e = 4500000;
for (var i = 0; i < count; ++i) {
  var coordinates = [2 * e * Math.random() - e, 2 * e * Math.random() - e];
  features[i] = new Feature(new Point(coordinates));
  features[i].setStyle(styles[styleKeys[Math.floor(Math.random() * 5)]]);
}

var source = new VectorSource({
  features: features
});

var vectorLayer = new VectorLayer({
  source: source
});

var map = new Map({
  layers: [
    vectorLayer
  ],
  target: 'map',
  view: new View({
    center: [0, 0],
    zoom: 2
  })
});
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package.json{
  "name": "regularshape",
  "dependencies": {
    "ol": "6.1.1"
  },
  "devDependencies": {
    "parcel": "1.11.0"
  },
  "scripts": {
    "start": "parcel index.html",
    "build": "parcel build --experimental-scope-hoisting --public-url . index.html"
  }
}