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- <!-- Licensed under a BSD license. See license.html for license -->
- <!DOCTYPE html>
- <html>
- <head>
- <meta charset="utf-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
- <title>Three.js - Scenegraph - Sun Earth</title>
- <style>
- html, body {
- height: 100%;
- margin: 0;
- color: white;
- font-family: monospace;
- }
- #c {
- width: 100%;
- height: 100%;
- display: block;
- }
- #ui {
- position: absolute;
- right: 1em;
- top: 1em;
- background: rgba(64, 64, 64, 0.8);
- padding: .5em;
- }
- #ui .axisgrid {
- display: flex;
- align-items: center;
- }
- #ui .axisgrid:nth-child(odd) {
- background: rgba(72, 72, 72, 0.8);
- }
- #ui .label {
- width: 8em;
- overflow: hidden;
- text-overflow: ellipsis;
- }
- #ui .checkbox {
- display: flex;
- align-items: center;
- }
- </style>
- </head>
- <body>
- <canvas id="c"></canvas>
- <div id="ui"></div>
- </body>
- <script type="importmap">
- {
- "imports": {
- "three": "../../build/three.module.js",
- "three/addons/": "../../examples/jsm/"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
- function main() {
- const canvas = document.querySelector( '#c' );
- const renderer = new THREE.WebGLRenderer( { antialias: true, canvas } );
- const gui = new GUI();
- const fov = 40;
- const aspect = 2; // the canvas default
- const near = 0.1;
- const far = 1000;
- const camera = new THREE.PerspectiveCamera( fov, aspect, near, far );
- camera.position.set( 0, 50, 0 );
- camera.up.set( 0, 0, 1 );
- camera.lookAt( 0, 0, 0 );
- const scene = new THREE.Scene();
- {
- const color = 0xFFFFFF;
- const intensity = 3;
- const light = new THREE.PointLight( color, intensity );
- scene.add( light );
- }
- const objects = [];
- const radius = 1;
- const widthSegments = 6;
- const heightSegments = 6;
- const sphereGeometry = new THREE.SphereGeometry(
- radius, widthSegments, heightSegments );
- const solarSystem = new THREE.Object3D();
- scene.add( solarSystem );
- objects.push( solarSystem );
- const sunMaterial = new THREE.MeshPhongMaterial( { emissive: 0xFFFF00 } );
- const sunMesh = new THREE.Mesh( sphereGeometry, sunMaterial );
- sunMesh.scale.set( 5, 5, 5 );
- solarSystem.add( sunMesh );
- objects.push( sunMesh );
- const earthOrbit = new THREE.Object3D();
- earthOrbit.position.x = 10;
- solarSystem.add( earthOrbit );
- objects.push( earthOrbit );
- const earthMaterial = new THREE.MeshPhongMaterial( { color: 0x2233FF, emissive: 0x112244 } );
- const earthMesh = new THREE.Mesh( sphereGeometry, earthMaterial );
- earthOrbit.add( earthMesh );
- objects.push( earthMesh );
- const moonOrbit = new THREE.Object3D();
- moonOrbit.position.x = 2;
- earthOrbit.add( moonOrbit );
- const moonMaterial = new THREE.MeshPhongMaterial( { color: 0x888888, emissive: 0x222222 } );
- const moonMesh = new THREE.Mesh( sphereGeometry, moonMaterial );
- moonMesh.scale.set( .5, .5, .5 );
- moonOrbit.add( moonMesh );
- objects.push( moonMesh );
- // Turns both axes and grid visible on/off
- // GUI requires a property that returns a bool
- // to decide to make a checkbox so we make a setter
- // can getter for `visible` which we can tell GUI
- // to look at.
- class AxisGridHelper {
- constructor( node, units = 10 ) {
- const axes = new THREE.AxesHelper();
- axes.material.depthTest = false;
- axes.renderOrder = 2; // after the grid
- node.add( axes );
- const grid = new THREE.GridHelper( units, units );
- grid.material.depthTest = false;
- grid.renderOrder = 1;
- node.add( grid );
- this.grid = grid;
- this.axes = axes;
- this.visible = false;
- }
- get visible() {
- return this._visible;
- }
- set visible( v ) {
- this._visible = v;
- this.grid.visible = v;
- this.axes.visible = v;
- }
- }
- function makeAxisGrid( node, label, units ) {
- const helper = new AxisGridHelper( node, units );
- gui.add( helper, 'visible' ).name( label );
- }
- makeAxisGrid( solarSystem, 'solarSystem', 26 );
- makeAxisGrid( sunMesh, 'sunMesh' );
- makeAxisGrid( earthOrbit, 'earthOrbit' );
- makeAxisGrid( earthMesh, 'earthMesh' );
- makeAxisGrid( moonOrbit, 'moonOrbit' );
- makeAxisGrid( moonMesh, 'moonMesh' );
- function resizeRendererToDisplaySize( renderer ) {
- const canvas = renderer.domElement;
- const width = canvas.clientWidth;
- const height = canvas.clientHeight;
- const needResize = canvas.width !== width || canvas.height !== height;
- if ( needResize ) {
- renderer.setSize( width, height, false );
- }
- return needResize;
- }
- function render( time ) {
- time *= 0.001;
- if ( resizeRendererToDisplaySize( renderer ) ) {
- const canvas = renderer.domElement;
- camera.aspect = canvas.clientWidth / canvas.clientHeight;
- camera.updateProjectionMatrix();
- }
- objects.forEach( ( obj ) => {
- obj.rotation.y = time;
- } );
- renderer.render( scene, camera );
- requestAnimationFrame( render );
- }
- requestAnimationFrame( render );
- }
- main();
- </script>
- </html>
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