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230 lines
6.4 KiB
230 lines
6.4 KiB
3 years ago
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<!-- Licensed under a BSD license. See license.html for license -->
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
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<title>Three.js - Fundamentals</title>
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<link href="resources/threejs-tutorials.css" rel="stylesheet" />
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<style>
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html, body {
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margin: 0;
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height: 100%;
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}
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canvas {
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width: 100%;
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height: 100%;
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display: block;
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}
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</style>
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</head>
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<body>
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<canvas id="c"></canvas>
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</body>
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<!-- Import maps polyfill -->
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<!-- Remove this when import maps will be widely supported -->
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<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
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<script type="importmap">
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{
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"imports": {
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"three": "../../build/three.module.js",
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"three/addons/": "../../examples/jsm/"
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}
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}
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</script>
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<script type="module">
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import * as THREE from 'three';
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import {OrbitControls} from 'three/addons/controls/OrbitControls.js';
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import {GLTFLoader} from 'three/addons/loaders/GLTFLoader.js';
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function main() {
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const canvas = document.querySelector('#c');
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const renderer = new THREE.WebGLRenderer({canvas});
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const scene = new THREE.Scene();
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const aspect = 2; // the canvas default
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const fov = 35;
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const near = 0.1;
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const far = 5000;
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const camera = new THREE.PerspectiveCamera(fov, aspect, near, far);
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camera.position.set(-580, 55, 390);
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const maxFovX = 40;
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const numBirds = 40;
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const minMax = 700;
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const birdSpeed = 100;
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const useFog = true;
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const useOrbitCamera = true;
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const showHelpers = false;
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if (useOrbitCamera) {
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const controls = new OrbitControls(camera, canvas);
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controls.target.set(0, 0, 0);
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controls.update();
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}
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renderer.outputEncoding = THREE.sRGBEncoding;
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renderer.shadowMap.enabled = true;
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const hemiLight = new THREE.HemisphereLight(0xffffff, 0xffffff, 0.6);
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hemiLight.color.setHSL(0.6, 1, 0.5);
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hemiLight.groundColor.setHSL(0.095, 1, 0.5);
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hemiLight.position.set(0, 50, 0);
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scene.add(hemiLight);
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if (showHelpers) {
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const hemiLightHelper = new THREE.HemisphereLightHelper(hemiLight, 10);
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scene.add(hemiLightHelper);
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}
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const dirLight = new THREE.DirectionalLight(0xffffff, 1);
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dirLight.color.setHSL(0.1, 1, 0.95);
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dirLight.position.set(-300, 220, 245);
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scene.add(dirLight);
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dirLight.castShadow = true;
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dirLight.shadow.mapSize.width = 2048;
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dirLight.shadow.mapSize.height = 2048;
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const d = 350;
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dirLight.shadow.camera.left = -d;
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dirLight.shadow.camera.right = d;
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dirLight.shadow.camera.top = d;
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dirLight.shadow.camera.bottom = -d;
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dirLight.shadow.camera.near = 100;
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dirLight.shadow.camera.far = 950;
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dirLight.shadow.bias = -0.005;
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if (showHelpers) {
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const dirLightHeper = new THREE.DirectionalLightHelper(dirLight, 10);
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scene.add(dirLightHeper);
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}
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const birds = [];
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const loader = new GLTFLoader();
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const fogNear = 1350;
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const fogFar = 1500;
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function rand(min, max) {
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if (min === undefined) {
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min = 0;
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max = 1;
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} else if (max === undefined) {
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max = min;
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min = 0;
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}
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return min + Math.random() * (max - min);
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}
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loader.load( 'resources/models/flamingo/Flamingo.glb', (gltf) => {
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const orig = gltf.scene.children[0];
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orig.castShadow = true;
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orig.receiveShadow = true;
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for (let i = 0; i < numBirds; ++i) {
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const u = i / (numBirds - 1);
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const mesh = orig.clone();
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mesh.position.set(
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rand(-150, 150),
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(u * 2 - 1) * 200,
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(minMax * 2 * i * 1.7) % (minMax * 2) - minMax / 2,
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);
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scene.add(mesh);
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mesh.material = mesh.material.clone();
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mesh.material.color.setHSL(rand(), 1, 0.8);
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const mixer = new THREE.AnimationMixer(mesh);
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mixer.clipAction(gltf.animations[0]).setDuration(1).play();
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mixer.update(rand(10));
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mixer.timeScale = rand(0.9, 1.1);
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birds.push({
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mixer,
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mesh,
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});
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}
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});
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window.s = scene;
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if (useFog) {
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const vertexShader = `
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varying vec3 vWorldPosition;
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void main() {
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vec4 worldPosition = modelMatrix * vec4( position, 1.0 );
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vWorldPosition = worldPosition.xyz;
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gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
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}
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`;
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const fragmentShader = `
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uniform vec3 topColor;
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uniform vec3 bottomColor;
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uniform float offset;
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uniform float exponent;
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varying vec3 vWorldPosition;
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void main() {
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float h = normalize( vWorldPosition + offset ).y;
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gl_FragColor = vec4( mix( bottomColor, topColor, max( pow( max( h , 0.0), exponent ), 0.0 ) ), 1.0 );
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}
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`;
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const uniforms = {
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topColor: { value: new THREE.Color(0x88AABB) },
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bottomColor: { value: new THREE.Color(0xEFCB7F) },
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offset: { value: 730 },
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exponent: { value: 0.3 },
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};
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uniforms.topColor.value.copy(hemiLight.color);
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scene.fog = new THREE.Fog(scene.background, fogNear, fogFar);
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scene.fog.color.copy(uniforms.bottomColor.value);
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const skyGeo = new THREE.SphereGeometry(3000, 32, 15);
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const skyMat = new THREE.ShaderMaterial( { vertexShader: vertexShader, fragmentShader: fragmentShader, uniforms: uniforms, side: THREE.BackSide } );
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const sky = new THREE.Mesh( skyGeo, skyMat );
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scene.add(sky);
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}
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function resizeRendererToDisplaySize(renderer) {
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const canvas = renderer.domElement;
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const width = canvas.clientWidth;
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const height = canvas.clientHeight;
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if (width === canvas.width && height === canvas.height) {
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return false;
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}
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renderer.setSize(width, height, false);
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return true;
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}
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let then = 0;
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function render(now) {
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now *= 0.001;
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const deltaTime = now - then;
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then = now;
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if (resizeRendererToDisplaySize(renderer)) {
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const aspect = canvas.clientWidth / canvas.clientHeight;
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const fovX = THREE.MathUtils.radToDeg(2 * Math.atan(Math.tan(THREE.MathUtils.degToRad(fov) * 0.5) * aspect));
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const newFovY = THREE.MathUtils.radToDeg(2 * Math.atan(Math.tan(THREE.MathUtils.degToRad(maxFovX) * .5) / aspect));
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camera.fov = fovX > maxFovX ? newFovY : fov;
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camera.aspect = aspect;
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camera.updateProjectionMatrix();
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}
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for (const {mesh, mixer} of birds) {
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mixer.update(deltaTime);
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mesh.position.z = (mesh.position.z + minMax + mixer.timeScale * birdSpeed * deltaTime) % (minMax * 2) - minMax;
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}
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renderer.render(scene, camera);
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requestAnimationFrame(render);
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}
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requestAnimationFrame(render);
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}
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main();
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</script>
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</html>
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