407 lines
10 KiB
HTML
407 lines
10 KiB
HTML
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js webgl - scenes transition</title>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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<link type="text/css" rel="stylesheet" href="main.css">
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</head>
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<body>
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<div id="info">
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgl scene transitions<br/>
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by <a href="https://twitter.com/fernandojsg">fernandojsg</a> - <a href="https://github.com/kile/three.js-demos">github</a>
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</div>
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<div id="container"></div>
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<script type="module">
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import * as THREE from '../build/three.module.js';
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import Stats from './jsm/libs/stats.module.js';
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import { GUI } from './jsm/libs/dat.gui.module.js';
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import { BufferGeometryUtils } from './jsm/utils/BufferGeometryUtils.js';
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let container, stats;
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let renderer;
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let transition;
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const transitionParams = {
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"useTexture": true,
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"transition": 0.5,
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"transitionSpeed": 2.0,
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"texture": 5,
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"loopTexture": true,
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"animateTransition": true,
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"textureThreshold": 0.3
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};
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const clock = new THREE.Clock();
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init();
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animate();
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function init() {
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initGUI();
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container = document.getElementById( "container" );
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renderer = new THREE.WebGLRenderer( { antialias: true } );
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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container.appendChild( renderer.domElement );
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stats = new Stats();
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container.appendChild( stats.dom );
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const sceneA = new FXScene( "cube", 5000, 1200, 120, new THREE.Vector3( 0, - 0.4, 0 ), 0xffffff );
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const sceneB = new FXScene( "sphere", 500, 2000, 50, new THREE.Vector3( 0, 0.2, 0.1 ), 0x000000 );
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transition = new Transition( sceneA, sceneB );
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}
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function animate() {
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requestAnimationFrame( animate );
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render();
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stats.update();
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}
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function initGUI() {
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const gui = new GUI();
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gui.add( transitionParams, "useTexture" ).onChange( function ( value ) {
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transition.useTexture( value );
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} );
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gui.add( transitionParams, 'loopTexture' );
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gui.add( transitionParams, 'texture', { Perlin: 0, Squares: 1, Cells: 2, Distort: 3, Gradient: 4, Radial: 5 } ).onChange( function ( value ) {
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transition.setTexture( value );
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} ).listen();
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gui.add( transitionParams, "textureThreshold", 0, 1, 0.01 ).onChange( function ( value ) {
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transition.setTextureThreshold( value );
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} );
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gui.add( transitionParams, "animateTransition" );
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gui.add( transitionParams, "transition", 0, 1, 0.01 ).listen();
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gui.add( transitionParams, "transitionSpeed", 0.5, 5, 0.01 );
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}
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function render() {
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transition.render( clock.getDelta() );
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}
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function generateGeometry( objectType, numObjects ) {
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function applyVertexColors( geometry, color ) {
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const position = geometry.attributes.position;
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const colors = [];
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for ( let i = 0; i < position.count; i ++ ) {
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colors.push( color.r, color.g, color.b );
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}
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geometry.setAttribute( 'color', new THREE.Float32BufferAttribute( colors, 3 ) );
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}
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const geometries = [];
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const matrix = new THREE.Matrix4();
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const position = new THREE.Vector3();
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const rotation = new THREE.Euler();
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const quaternion = new THREE.Quaternion();
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const scale = new THREE.Vector3();
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const color = new THREE.Color();
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for ( let i = 0; i < numObjects; i ++ ) {
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position.x = Math.random() * 10000 - 5000;
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position.y = Math.random() * 6000 - 3000;
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position.z = Math.random() * 8000 - 4000;
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rotation.x = Math.random() * 2 * Math.PI;
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rotation.y = Math.random() * 2 * Math.PI;
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rotation.z = Math.random() * 2 * Math.PI;
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quaternion.setFromEuler( rotation );
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scale.x = Math.random() * 200 + 100;
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let geometry;
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if ( objectType === 'cube' ) {
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geometry = new THREE.BoxGeometry( 1, 1, 1 );
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geometry = geometry.toNonIndexed(); // merging needs consistent buffer geometries
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scale.y = Math.random() * 200 + 100;
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scale.z = Math.random() * 200 + 100;
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color.setRGB( 0, 0, 0.1 + 0.9 * Math.random() );
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} else if ( objectType === 'sphere' ) {
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geometry = new THREE.IcosahedronGeometry( 1, 1 );
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scale.y = scale.z = scale.x;
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color.setRGB( 0.1 + 0.9 * Math.random(), 0, 0 );
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}
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// give the geom's vertices a random color, to be displayed
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applyVertexColors( geometry, color );
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matrix.compose( position, quaternion, scale );
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geometry.applyMatrix4( matrix );
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geometries.push( geometry );
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}
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return BufferGeometryUtils.mergeBufferGeometries( geometries );
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}
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function FXScene( type, numObjects, cameraZ, fov, rotationSpeed, clearColor ) {
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this.clearColor = clearColor;
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this.camera = new THREE.PerspectiveCamera( fov, window.innerWidth / window.innerHeight, 1, 10000 );
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this.camera.position.z = cameraZ;
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// Setup scene
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this.scene = new THREE.Scene();
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this.scene.add( new THREE.AmbientLight( 0x555555 ) );
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const light = new THREE.SpotLight( 0xffffff, 1.5 );
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light.position.set( 0, 500, 2000 );
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this.scene.add( light );
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this.rotationSpeed = rotationSpeed;
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const defaultMaterial = new THREE.MeshPhongMaterial( { color: 0xffffff, flatShading: true, vertexColors: true } );
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this.mesh = new THREE.Mesh( generateGeometry( type, numObjects ), defaultMaterial );
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this.scene.add( this.mesh );
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const renderTargetParameters = { minFilter: THREE.LinearFilter, magFilter: THREE.LinearFilter, format: THREE.RGBFormat };
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this.fbo = new THREE.WebGLRenderTarget( window.innerWidth, window.innerHeight, renderTargetParameters );
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this.render = function ( delta, rtt ) {
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this.mesh.rotation.x += delta * this.rotationSpeed.x;
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this.mesh.rotation.y += delta * this.rotationSpeed.y;
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this.mesh.rotation.z += delta * this.rotationSpeed.z;
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renderer.setClearColor( this.clearColor );
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if ( rtt ) {
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renderer.setRenderTarget( this.fbo );
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renderer.clear();
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renderer.render( this.scene, this.camera );
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} else {
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renderer.setRenderTarget( null );
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renderer.render( this.scene, this.camera );
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}
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};
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}
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function Transition( sceneA, sceneB ) {
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this.scene = new THREE.Scene();
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this.cameraOrtho = new THREE.OrthographicCamera( window.innerWidth / - 2, window.innerWidth / 2, window.innerHeight / 2, window.innerHeight / - 2, - 10, 10 );
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this.textures = [];
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const loader = new THREE.TextureLoader();
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for ( let i = 0; i < 6; i ++ )
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this.textures[ i ] = loader.load( 'textures/transition/transition' + ( i + 1 ) + '.png' );
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this.quadmaterial = new THREE.ShaderMaterial( {
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uniforms: {
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tDiffuse1: {
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value: null
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},
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tDiffuse2: {
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value: null
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},
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mixRatio: {
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value: 0.0
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},
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threshold: {
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value: 0.1
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},
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useTexture: {
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value: 1
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},
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tMixTexture: {
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value: this.textures[ 0 ]
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}
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},
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vertexShader: [
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"varying vec2 vUv;",
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"void main() {",
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"vUv = vec2( uv.x, uv.y );",
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"gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
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"}"
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].join( "\n" ),
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fragmentShader: [
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"uniform float mixRatio;",
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"uniform sampler2D tDiffuse1;",
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"uniform sampler2D tDiffuse2;",
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"uniform sampler2D tMixTexture;",
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"uniform int useTexture;",
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"uniform float threshold;",
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"varying vec2 vUv;",
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"void main() {",
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" vec4 texel1 = texture2D( tDiffuse1, vUv );",
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" vec4 texel2 = texture2D( tDiffuse2, vUv );",
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" if (useTexture==1) {",
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" vec4 transitionTexel = texture2D( tMixTexture, vUv );",
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" float r = mixRatio * (1.0 + threshold * 2.0) - threshold;",
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" float mixf=clamp((transitionTexel.r - r)*(1.0/threshold), 0.0, 1.0);",
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" gl_FragColor = mix( texel1, texel2, mixf );",
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" } else {",
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" gl_FragColor = mix( texel2, texel1, mixRatio );",
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" }",
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"}"
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].join( "\n" )
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} );
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const quadgeometry = new THREE.PlaneGeometry( window.innerWidth, window.innerHeight );
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this.quad = new THREE.Mesh( quadgeometry, this.quadmaterial );
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this.scene.add( this.quad );
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// Link both scenes and their FBOs
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this.sceneA = sceneA;
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this.sceneB = sceneB;
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this.quadmaterial.uniforms.tDiffuse1.value = sceneA.fbo.texture;
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this.quadmaterial.uniforms.tDiffuse2.value = sceneB.fbo.texture;
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this.needChange = false;
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this.setTextureThreshold = function ( value ) {
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this.quadmaterial.uniforms.threshold.value = value;
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};
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this.useTexture = function ( value ) {
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this.quadmaterial.uniforms.useTexture.value = value ? 1 : 0;
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};
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this.setTexture = function ( i ) {
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this.quadmaterial.uniforms.tMixTexture.value = this.textures[ i ];
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};
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this.render = function ( delta ) {
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// Transition animation
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if ( transitionParams.animateTransition ) {
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const t = ( 1 + Math.sin( transitionParams.transitionSpeed * clock.getElapsedTime() / Math.PI ) ) / 2;
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transitionParams.transition = THREE.MathUtils.smoothstep( t, 0.3, 0.7 );
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// Change the current alpha texture after each transition
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if ( transitionParams.loopTexture && ( transitionParams.transition == 0 || transitionParams.transition == 1 ) ) {
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if ( this.needChange ) {
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transitionParams.texture = ( transitionParams.texture + 1 ) % this.textures.length;
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this.quadmaterial.uniforms.tMixTexture.value = this.textures[ transitionParams.texture ];
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this.needChange = false;
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}
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} else
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this.needChange = true;
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}
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this.quadmaterial.uniforms.mixRatio.value = transitionParams.transition;
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// Prevent render both scenes when it's not necessary
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if ( transitionParams.transition == 0 ) {
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this.sceneB.render( delta, false );
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} else if ( transitionParams.transition == 1 ) {
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this.sceneA.render( delta, false );
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} else {
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// When 0<transition<1 render transition between two scenes
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this.sceneA.render( delta, true );
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this.sceneB.render( delta, true );
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renderer.setRenderTarget( null );
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renderer.clear();
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renderer.render( this.scene, this.cameraOrtho );
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}
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};
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}
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</script>
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</body>
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</html>
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