three-conic-polygon-geometry
Version:
ThreeJS geometry for drawing polygons on a sphere
77 lines (65 loc) • 2.7 kB
HTML
<head>
<style> body { margin: 0; } </style>
<script type="importmap">{ "imports": {
"three": "https://esm.sh/three",
"three/": "https://esm.sh/three/"
}}</script>
<!-- <script type="module">import * as THREE from 'three'; window.THREE = THREE;</script>-->
<!-- <script src="../../dist/three-conic-polygon-geometry.js" defer></script>-->
</head>
<body>
<div id="viz"></div>
<script type="module">
import ConicPolygonGeometry from 'https://esm.sh/three-conic-polygon-geometry?external=three';
import * as THREE from 'three';
import { TrackballControls } from 'three/examples/jsm/controls/TrackballControls.js?external=three';
fetch('../geojson/ne_110m_admin_0_countries.geojson').then(res => res.json()).then(countries =>
{
const materials = [
new THREE.MeshBasicMaterial({ side: THREE.DoubleSide, color: 'green', opacity: 0.1, transparent: true }), // side material
new THREE.MeshBasicMaterial({ side: THREE.DoubleSide, color: 'red', opacity: 0.7, transparent: true }), // bottom cap material
new THREE.MeshBasicMaterial({ color: 'red', opacity: 0.7, transparent: true, wireframe: true }) // top cap material
];
const polygonMeshes = [];
countries.features.forEach(({ properties, geometry }) => {
const polygons = geometry.type === 'Polygon' ? [geometry.coordinates] : geometry.coordinates;
const alt = 50;
polygons.forEach(coords => {
polygonMeshes.push(
new THREE.Mesh(
new ConicPolygonGeometry(coords, alt / 10, alt, true, true, true, 1),
materials
)
);
});
});
// Setup renderer
const renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setPixelRatio(window.devicePixelRatio);
document.getElementById('viz').appendChild(renderer.domElement);
// Setup scene
const scene = new THREE.Scene();
polygonMeshes.forEach(mesh => scene.add(mesh));
scene.add(new THREE.AmbientLight(0xbbbbbb));
scene.add(new THREE.DirectionalLight(0xffffff, 0.6));
// Setup camera
const camera = new THREE.PerspectiveCamera();
camera.aspect = window.innerWidth/ window.innerHeight;
camera.updateProjectionMatrix();
camera.position.z = 200;
// Add camera controls
const tbControls = new TrackballControls(camera, renderer.domElement);
tbControls.minDistance = 1;
tbControls.rotateSpeed = 5;
tbControls.zoomSpeed = 0.8;
// Kick-off renderer
(function animate() { // IIFE
// Frame cycle
tbControls.update();
renderer.render(scene, camera);
requestAnimationFrame(animate);
})();
});
</script>
</body>