Circles 2

by Vladimir Vershinin

HTML

<script src="https://unpkg.com/[email protected]/lodash.js"></script>
<script src="https://cdn.jsdelivr.net/gh/openlayers/openlayers.github.io@master/en/v5.3.0/build/ol.js"></script>
<script src="https://unpkg.com/[email protected]/dist/vue.js"></script>
<script src="https://unpkg.com/[email protected]/lib/index.umd.js"></script>
<link rel="stylesheet" href="https://unpkg.com/[email protected]/lib/style.css">
<link rel="stylesheet" href="https://unpkg.com/[email protected]/lib/style.css">
<div id="app">
  <vl-map data-projection="EPSG:4326">
    <vl-view :zoom.sync="zoom" :center.sync="center"></vl-view>
    
    <vl-layer-tile>
      <vl-source-osm></vl-source-osm>
    </vl-layer-tile>
    
    <vl-layer-vector render-mode="image" :update-while-animating="true">
        <vl-source-vector projection="EPSG:3857" :features.sync="features"></vl-source-vector>
      </vl-layer-vector>
  </vl-map>  
</div>

CSS

html, body, #app {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}

JavaScript

new Vue({
	el: '#app',
  data () {
  	return {
    	zoom: 2,
      center: [0, 0],
      features: [],
    }
  },
  mounted () {
	  this.features.push({
      type: "Feature",
      geometry: {
        type: 'Polygon',
        coordinates: ol.geom.Polygon.fromCircle(new ol.geom.Circle([30e5,60e5], 20e5), 360).getCoordinates()
      },
    })
  },
})