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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 - buffergeometry - 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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+ <style>
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+ body {
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+ margin: 0px;
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+ overflow: hidden;
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+ text-align: center;
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+ }
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+
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+ #info {
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+ color: #fff;
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+ position: absolute;
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+ top: 10px;
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+ width: 100%;
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+ }
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+
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+ </style>
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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="http://threejs.org" target="_blank" rel="noopener">three.js</a> - buffergeometry - morph targets
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+ </div>
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+
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+ <script src="../build/three.js"></script>
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+
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+ <script src="js/controls/OrbitControls.js"></script>
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+ <script src="js/WebGL.js"></script>
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+ <script src="js/libs/dat.gui.min.js"></script>
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+
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+ <script>
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+
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+ var container, camera, scene, renderer, mesh;
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+
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+ function init() {
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+
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+ if ( WEBGL.isWebGLAvailable() === false ) {
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+
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+ document.body.appendChild( WEBGL.getWebGLErrorMessage() );
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+ return false;
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+
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+ }
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+
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+ container = document.getElementById( 'container' );
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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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+
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+ var controls = new THREE.OrbitControls( camera, container );
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+
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+ scene = new THREE.Scene();
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+ scene.background = new THREE.Color( 0x8FBCD4 );
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+ var pointLight = new THREE.PointLight( 0xffffff, 1 );
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+ camera.add( pointLight );
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+ scene.add( camera );
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+
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+ var geometry = createGeometry();
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+
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+ var material = new THREE.MeshPhongMaterial( { flatShading: true, color: 0xff0000, 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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+ initGUI();
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+
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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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+
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+ renderer.setAnimationLoop( function () {
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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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+ container.appendChild( renderer.domElement );
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+
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+
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+ window.addEventListener( 'resize', onWindowResize, false );
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+
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+ }
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+
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+ function createGeometry() {
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+
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+ var geometry = new THREE.BoxBufferGeometry( 2, 2, 2, 32, 32, 32 );
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+
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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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+
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+ // the original positions of the cube's vertices
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+ var positions = geometry.attributes.position.array;
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+
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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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+ var spherePositions = [];
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+
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+ // for the second morph target, we'll twist the cubes vertices
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+ var twistPositions = [];
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+ var direction = new THREE.Vector3( 1, 0, 0 ).normalize();
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+ var vertex = new THREE.Vector3();
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+
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+ for ( var i = 0; i < positions.length; i += 3 ) {
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+
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+ var x = positions[ i ];
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+ var y = positions[ i + 1 ];
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+ var z = positions[ i + 2 ];
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+
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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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+
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+ );
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+
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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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+
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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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+
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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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+
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+ return geometry;
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+
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+ }
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+
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+ function initGUI() {
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+
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+ // Set up dat.GUI to control targets
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+ var params = {
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+ Spherify: 0,
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+ Twist: 0,
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+ };
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+ var gui = new dat.GUI();
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+ var folder = gui.addFolder( 'Morph Targets' );
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+
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+ folder.add( params, 'Spherify', 0, 1 ).step( 0.01 ).onChange( function ( value ) {
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+
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+ mesh.morphTargetInfluences[ 0 ] = value;
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+
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+ } );
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+ folder.add( params, 'Twist', 0, 1 ).step( 0.01 ).onChange( function ( value ) {
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+
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+ mesh.morphTargetInfluences[ 1 ] = value;
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+
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+ } );
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+
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+ folder.open();
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+
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+ }
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+
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+ function onWindowResize() {
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+
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+ camera.aspect = window.innerWidth / window.innerHeight;
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+ camera.updateProjectionMatrix();
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+ renderer.setSize( window.innerWidth, window.innerHeight );
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+
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+ }
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+
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+ init();
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+ </script>
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+
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+ </body>
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+</html>
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Mr.doob