#### Regular Shapes

Example of some Regular Shape styles.

This example shows how several regular shapes or symbols (representing `x`, `cross`, `star`, `triangle`, `square` and `stacked`) can be created. A `rectangle` is produced by scaling a square created without rotation. Style `stacked` represents possility to stack multiple shapes with offset

##### main.js
``````import 'ol/ol.css';
import Feature from 'ol/Feature';
import Map from 'ol/Map';
import Point from 'ol/geom/Point';
import VectorLayer from 'ol/layer/Vector';
import VectorSource from 'ol/source/Vector';
import View from 'ol/View';
import {Fill, RegularShape, Stroke, Style} from 'ol/style';

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

const styles = {
'square': new Style({
image: new RegularShape({
fill: fill,
stroke: stroke,
points: 4,
angle: Math.PI / 4,
}),
}),
'rectangle': new Style({
image: new RegularShape({
fill: fill,
stroke: stroke,
points: 4,
angle: 0,
scale: [1, 0.5],
}),
}),
'triangle': new Style({
image: new RegularShape({
fill: fill,
stroke: stroke,
points: 3,
rotation: Math.PI / 4,
angle: 0,
}),
}),
'star': new Style({
image: new RegularShape({
fill: fill,
stroke: stroke,
points: 5,
angle: 0,
}),
}),
'cross': new Style({
image: new RegularShape({
fill: fill,
stroke: stroke,
points: 4,
angle: 0,
}),
}),
'x': new Style({
image: new RegularShape({
fill: fill,
stroke: stroke,
points: 4,
angle: Math.PI / 4,
}),
}),
'stacked': [
new Style({
image: new RegularShape({
fill: fill,
stroke: stroke,
points: 4,
angle: Math.PI / 4,
displacement: [0, 10],
}),
}),
new Style({
image: new RegularShape({
fill: fill,
stroke: stroke,
points: 4,
angle: Math.PI / 4,
}),
}),
],
};

const styleKeys = [
'x',
'cross',
'star',
'triangle',
'square',
'rectangle',
'stacked',
];
const count = 250;
const features = new Array(count);
const e = 4500000;
for (let i = 0; i < count; ++i) {
const 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() * styleKeys.length)]]
);
}

const source = new VectorSource({
features: features,
});

const vectorLayer = new VectorLayer({
source: source,
});

const map = new Map({
layers: [vectorLayer],
target: 'map',
view: new View({
center: [0, 0],
zoom: 2,
}),
});
``````
##### index.html
``````<!DOCTYPE html>
<html lang="en">
<meta charset="UTF-8">
<title>Regular Shapes</title>
<!-- Pointer events polyfill for old browsers, see https://caniuse.com/#feat=pointer -->
<script src="https://unpkg.com/[email protected]/dist/elm-pep.js"></script>
<!-- The lines below are only needed for old environments like Internet Explorer and Android 4.x -->
<script src="https://cdn.polyfill.io/v3/polyfill.min.js?features=fetch,requestAnimationFrame,Element.prototype.classList,TextDecoder"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/core-js/3.18.3/minified.js"></script>
<style>
.map {
width: 100%;
height:400px;
}
</style>
<body>
<div id="map" class="map"></div>
<script src="main.js"></script>
</body>
</html>``````
##### package.json
``````{
"name": "regularshape",
"dependencies": {
"ol": "6.14.1"
},
"devDependencies": {
"parcel": "^2.0.0"
},
"scripts": {
"start": "parcel index.html",
"build": "parcel build --public-url . index.html"
}
}``````