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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 - Fundamentals</title>
- <link href="resources/threejs-tutorials.css" rel="stylesheet" />
- <style>
- html, body {
- margin: 0;
- height: 100%;
- }
- canvas {
- width: 100%;
- height: 100%;
- display: block;
- }
- </style>
- </head>
- <body>
- <canvas id="c"></canvas>
- </body>
- <script type="importmap">
- {
- "imports": {
- "three": "../../build/three.module.js",
- "three/addons/": "../../examples/jsm/"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';
- function main() {
- const canvas = document.querySelector( '#c' );
- const renderer = new THREE.WebGLRenderer( { antialias: true, canvas } );
- const scene = new THREE.Scene();
- const aspect = 2; // the canvas default
- const fov = 35;
- const near = 0.1;
- const far = 5000;
- const camera = new THREE.PerspectiveCamera( fov, aspect, near, far );
- camera.position.x = - 0.;
- camera.position.y = 350;
- camera.position.z = 40.;
- const useFog = true;
- const useOrbitCamera = false;
- const showHelpers = false;
- const camSpeed = 0.2;
- if ( useOrbitCamera ) {
- const controls = new OrbitControls( camera, canvas );
- controls.target.set( 0, 100.01, 0.2 );
- controls.update();
- }
- renderer.shadowMap.enabled = true;
- const hemiLight = new THREE.HemisphereLight( 0xffffff, 0xffffff, 2 );
- hemiLight.color.setHSL( 0.6, 1, 0.6 );
- hemiLight.groundColor.setHSL( 0.095, 1, 0.75 );
- hemiLight.position.set( 0, 50, 0 );
- scene.add( hemiLight );
- if ( showHelpers ) {
- const hemiLightHelper = new THREE.HemisphereLightHelper( hemiLight, 10 );
- scene.add( hemiLightHelper );
- }
- const dirLight = new THREE.DirectionalLight( 0xffffff, 3 );
- dirLight.color.setHSL( 0.1, 1, 0.95 );
- dirLight.position.set( - 300, 220, 245 );
- scene.add( dirLight );
- dirLight.castShadow = true;
- dirLight.shadow.mapSize.width = 2048;
- dirLight.shadow.mapSize.height = 2048;
- const d = 350;
- dirLight.shadow.camera.left = - d;
- dirLight.shadow.camera.right = d;
- dirLight.shadow.camera.top = d;
- dirLight.shadow.camera.bottom = - d;
- dirLight.shadow.camera.near = 100;
- dirLight.shadow.camera.far = 950;
- dirLight.shadow.bias = - 0.005;
- if ( showHelpers ) {
- const dirLightHeper = new THREE.DirectionalLightHelper( dirLight, 10 );
- scene.add( dirLightHeper );
- }
- const loader = new GLTFLoader();
- const camRadius = 600;
- const camHeight = 160;
- const camTarget = [ 0, 30, 0 ];
- const fogNear = 1350;
- const fogFar = 1500;
- loader.load( 'resources/models/mountain_landscape/scene.gltf', ( gltf ) => {
- gltf.scene.traverse( ( child ) => {
- if ( child.isMesh ) {
- child.castShadow = true;
- child.receiveShadow = true;
- }
- } );
- scene.add( gltf.scene );
- } );
- window.s = scene;
- if ( useFog ) {
- const vertexShader = `
- varying vec3 vWorldPosition;
- void main() {
- vec4 worldPosition = modelMatrix * vec4( position, 1.0 );
- vWorldPosition = worldPosition.xyz;
- gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
- }
- `;
- const fragmentShader = `
- uniform vec3 topColor;
- uniform vec3 bottomColor;
- uniform float offset;
- uniform float exponent;
- varying vec3 vWorldPosition;
- void main() {
- float h = normalize( vWorldPosition + offset ).y;
- gl_FragColor = vec4( mix( bottomColor, topColor, max( pow( max( h , 0.0), exponent ), 0.0 ) ), 1.0 );
- }
- `;
- const uniforms = {
- topColor: { value: new THREE.Color( 0x88AABB ) },
- bottomColor: { value: new THREE.Color( 0xEFCB7F ) },
- offset: { value: 730 },
- exponent: { value: 0.3 },
- };
- uniforms.topColor.value.copy( hemiLight.color );
- scene.fog = new THREE.Fog( scene.background, fogNear, fogFar );
- scene.fog.color.copy( uniforms.bottomColor.value );
- const skyGeo = new THREE.SphereGeometry( 4000, 32, 15 );
- const skyMat = new THREE.ShaderMaterial( { vertexShader: vertexShader, fragmentShader: fragmentShader, uniforms: uniforms, side: THREE.BackSide } );
- const sky = new THREE.Mesh( skyGeo, skyMat );
- scene.add( sky );
- }
- function resizeRendererToDisplaySize( renderer ) {
- const canvas = renderer.domElement;
- const width = canvas.clientWidth;
- const height = canvas.clientHeight;
- if ( width === canvas.width && height === canvas.height ) {
- return false;
- }
- renderer.setSize( width, height, false );
- return true;
- }
- function render( time ) {
- time *= 0.001;
- time += 80;
- if ( resizeRendererToDisplaySize( renderer ) ) {
- camera.aspect = canvas.clientWidth / canvas.clientHeight;
- camera.updateProjectionMatrix();
- }
- if ( ! useOrbitCamera ) {
- const angle = Math.sin( time * camSpeed ) + Math.PI * .75;
- camera.position.set( Math.cos( angle ) * camRadius, camHeight, Math.sin( angle ) * camRadius );
- camera.lookAt( ...camTarget );
- }
- renderer.render( scene, camera );
- requestAnimationFrame( render );
- }
- requestAnimationFrame( render );
- }
- main();
- </script>
- </html>
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