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@@ -1,15 +1,17 @@
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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 - animation - morph targets</title>
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+ <title>three.js webgl - morph targets</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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+
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<body>
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<div id="container"></div>
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<div id="info">
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- <a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - WebGL morph target example
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+ <a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - morph targets<br/>
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+ by <a href="https://discoverthreejs.com/" target="_blank" rel="noopener">Discover three.js</a>
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</div>
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<script type="module">
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@@ -19,160 +21,128 @@
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import { GUI } from './jsm/libs/dat.gui.module.js';
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import { OrbitControls } from './jsm/controls/OrbitControls.js';
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- let camera, scene, renderer, raycaster;
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-
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- let mesh;
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- const mouse = new THREE.Vector2();
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+ let container, camera, scene, renderer, mesh;
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init();
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- animate();
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function init() {
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- const container = document.getElementById( 'container' );
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-
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- camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 2000 );
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- camera.position.z = 500;
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+ container = document.getElementById( 'container' );
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scene = new THREE.Scene();
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- scene.background = new THREE.Color( 0x222222 );
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- scene.fog = new THREE.Fog( 0x000000, 1, 15000 );
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+ scene.background = new THREE.Color( 0x8FBCD4 );
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- const light = new THREE.PointLight( 0xffffff );
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- light.position.z = 500;
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- camera.add( light );
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+ camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 20 );
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+ camera.position.z = 10;
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scene.add( camera );
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- scene.add( new THREE.AmbientLight( 0x111111 ) );
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-
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- const geometry = new THREE.BoxGeometry( 100, 100, 100 );
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- const material = new THREE.MeshLambertMaterial( { color: 0xff0000, morphTargets: true } );
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-
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- // construct 8 blend shapes
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-
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- for ( let i = 0; i < 8; i ++ ) {
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-
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- const vertices = [];
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-
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- for ( let v = 0; v < geometry.vertices.length; v ++ ) {
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+ scene.add( new THREE.AmbientLight( 0x8FBCD4, 0.4 ) );
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- vertices.push( geometry.vertices[ v ].clone() );
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+ const pointLight = new THREE.PointLight( 0xffffff, 1 );
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+ camera.add( pointLight );
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- if ( v === i ) {
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+ const geometry = createGeometry();
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- vertices[ vertices.length - 1 ].x *= 2;
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- vertices[ vertices.length - 1 ].y *= 2;
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- vertices[ vertices.length - 1 ].z *= 2;
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-
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- }
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-
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- }
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-
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- geometry.morphTargets.push( { name: "target" + i, vertices: vertices } );
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-
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- }
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-
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- mesh = new THREE.Mesh( new THREE.BufferGeometry().fromGeometry( geometry ), material );
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+ const material = new THREE.MeshPhongMaterial( {
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+ color: 0xff0000,
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+ flatShading: true,
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+ morphTargets: true
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+ } );
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+ mesh = new THREE.Mesh( geometry, material );
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scene.add( mesh );
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- //
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-
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- const params = {
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- influence1: 0,
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- influence2: 0,
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- influence3: 0,
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- influence4: 0,
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- influence5: 0,
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- influence6: 0,
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- influence7: 0,
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- influence8: 0
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- };
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-
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- const gui = new GUI();
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-
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- const folder = gui.addFolder( 'Morph Targets' );
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- folder.add( params, 'influence1', 0, 1 ).step( 0.01 ).onChange( function ( value ) {
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-
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- mesh.morphTargetInfluences[ 0 ] = value;
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+ initGUI();
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- } );
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- folder.add( params, 'influence2', 0, 1 ).step( 0.01 ).onChange( function ( value ) {
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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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+ renderer.setAnimationLoop( function () {
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- mesh.morphTargetInfluences[ 1 ] = value;
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+ renderer.render( scene, camera );
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} );
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- folder.add( params, 'influence3', 0, 1 ).step( 0.01 ).onChange( function ( value ) {
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+ container.appendChild( renderer.domElement );
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- mesh.morphTargetInfluences[ 2 ] = value;
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+ const controls = new OrbitControls( camera, renderer.domElement );
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+ controls.enableZoom = false;
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- } );
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- folder.add( params, 'influence4', 0, 1 ).step( 0.01 ).onChange( function ( value ) {
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+ window.addEventListener( 'resize', onWindowResize, false );
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- mesh.morphTargetInfluences[ 3 ] = value;
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+ }
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- } );
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- folder.add( params, 'influence5', 0, 1 ).step( 0.01 ).onChange( function ( value ) {
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+ function createGeometry() {
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- mesh.morphTargetInfluences[ 4 ] = value;
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+ const geometry = new THREE.BoxBufferGeometry( 2, 2, 2, 32, 32, 32 );
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- } );
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- folder.add( params, 'influence6', 0, 1 ).step( 0.01 ).onChange( function ( value ) {
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+ // create an empty array to hold targets for the attribute we want to morph
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+ // morphing positions and normals is supported
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+ geometry.morphAttributes.position = [];
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- mesh.morphTargetInfluences[ 5 ] = value;
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+ // the original positions of the cube's vertices
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+ const positionAttribute = geometry.attributes.position;
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- } );
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- folder.add( params, 'influence7', 0, 1 ).step( 0.01 ).onChange( function ( value ) {
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+ // for the first morph target we'll move the cube's vertices onto the surface of a sphere
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+ const spherePositions = [];
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- mesh.morphTargetInfluences[ 6 ] = value;
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+ // for the second morph target, we'll twist the cubes vertices
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+ const twistPositions = [];
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+ const direction = new THREE.Vector3( 1, 0, 0 );
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+ const vertex = new THREE.Vector3();
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- } );
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- folder.add( params, 'influence8', 0, 1 ).step( 0.01 ).onChange( function ( value ) {
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+ for ( let i = 0; i < positionAttribute.count; i ++ ) {
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- mesh.morphTargetInfluences[ 7 ] = value;
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+ const x = positionAttribute.getX( i );
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+ const y = positionAttribute.getY( i );
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+ const z = positionAttribute.getZ( i );
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- } );
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- folder.open();
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+ spherePositions.push(
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- //
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+ x * Math.sqrt( 1 - ( y * y / 2 ) - ( z * z / 2 ) + ( y * y * z * z / 3 ) ),
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+ y * Math.sqrt( 1 - ( z * z / 2 ) - ( x * x / 2 ) + ( z * z * x * x / 3 ) ),
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+ z * Math.sqrt( 1 - ( x * x / 2 ) - ( y * y / 2 ) + ( x * x * y * y / 3 ) )
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- raycaster = new THREE.Raycaster();
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+ );
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- renderer = new THREE.WebGLRenderer();
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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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+ // stretch along the x-axis so we can see the twist better
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+ vertex.set( x * 2, y, z );
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- //
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+ vertex.applyAxisAngle( direction, Math.PI * x / 2 ).toArray( twistPositions, twistPositions.length );
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- const controls = new OrbitControls( camera, renderer.domElement );
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- controls.minDistance = 400;
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- controls.maxDistance = 1000;
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+ }
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- //
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+ // add the spherical positions as the first morph target
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+ geometry.morphAttributes.position[ 0 ] = new THREE.Float32BufferAttribute( spherePositions, 3 );
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- window.addEventListener( 'resize', onWindowResize, false );
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+ // add the twisted positions as the second morph target
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+ geometry.morphAttributes.position[ 1 ] = new THREE.Float32BufferAttribute( twistPositions, 3 );
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- document.addEventListener( 'click', onClick, false );
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+ return geometry;
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}
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- function onClick( event ) {
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+ function initGUI() {
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- event.preventDefault();
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+ // Set up dat.GUI to control targets
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+ const params = {
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+ Spherify: 0,
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+ Twist: 0,
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+ };
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+ const gui = new GUI();
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+ const folder = gui.addFolder( 'Morph Targets' );
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- mouse.x = ( event.clientX / window.innerWidth ) * 2 - 1;
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- mouse.y = - ( event.clientY / window.innerHeight ) * 2 + 1;
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+ folder.add( params, 'Spherify', 0, 1 ).step( 0.01 ).onChange( function ( value ) {
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- raycaster.setFromCamera( mouse, camera );
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+ mesh.morphTargetInfluences[ 0 ] = value;
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- const intersects = raycaster.intersectObject( mesh );
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+ } );
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+ folder.add( params, 'Twist', 0, 1 ).step( 0.01 ).onChange( function ( value ) {
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- if ( intersects.length > 0 ) {
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+ mesh.morphTargetInfluences[ 1 ] = value;
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- mesh.material.color.set( Math.random() * 0xffffff );
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+ } );
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- }
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+ folder.open();
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}
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@@ -185,21 +155,6 @@
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}
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- function animate() {
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-
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- requestAnimationFrame( animate );
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- render();
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-
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- }
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-
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- function render() {
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-
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- mesh.rotation.y += 0.01;
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-
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- renderer.render( scene, camera );
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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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Mr.doob
