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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 - clipping planes</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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+ background-color: #000000;
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+ overflow: hidden;
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+ }
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+ </style>
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+ </head>
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+ <body>
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+
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+ <script src="../build/three.js"></script>
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+ <script src="js/controls/OrbitControls.js"></script>
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+ <script src="js/libs/stats.min.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 camera, scene, renderer, startTime, object, stats;
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+
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+ init();
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+ animate();
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+
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+ function init() {
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+
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+ camera = new THREE.PerspectiveCamera( 36, window.innerWidth / window.innerHeight );
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+
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+ camera.position.set( 0, 1.3, 3 );
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+
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+ scene = new THREE.Scene();
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+
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+ // Lights
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+
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+ scene.add( new THREE.AmbientLight( 0xffffff, 0.5 ) );
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+
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+ var dirLight = new THREE.DirectionalLight( 0xffffff, 1 );
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+ dirLight.position.set( 5, 10, 5 );
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+ dirLight.castShadow = true;
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+ dirLight.shadow.camera.right = 2;
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+ dirLight.shadow.camera.left = - 2;
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+ dirLight.shadow.camera.top = 2;
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+ dirLight.shadow.camera.bottom = - 2;
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+
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+ dirLight.shadow.mapSize.width = 1024;
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+ dirLight.shadow.mapSize.height = 1024;
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+ scene.add( dirLight );
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+
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+ // ***** Clipping planes: *****
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+
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+ var localPlane = new THREE.Plane( new THREE.Vector3( 0, - 1, 0 ), 0.8 );
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+ var globalPlane = new THREE.Plane( new THREE.Vector3( - 1, 0, 0 ), 0.1 );
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+
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+ // Geometry
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+
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+ var material = new THREE.MeshStandardMaterial( {
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+ color: 0xFFC107,
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+ metalness: 0.1,
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+ roughness: 0.75,
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+ side: THREE.DoubleSide,
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+ clippingPlanes: [ localPlane ],
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+ clipShadows: true
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+
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+ } );
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+
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+ var geometry = new THREE.TorusKnotBufferGeometry( 0.4, 0.15, 220, 60 );
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+
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+ object = new THREE.Mesh( geometry, material );
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+ object.castShadow = true;
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+ scene.add( object );
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+
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+ var ground = new THREE.Mesh(
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+ new THREE.PlaneBufferGeometry( 9, 9, 1, 1 ),
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+ new THREE.ShadowMaterial( { color: 0, opacity: 0.25, side: THREE.DoubleSide } )
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+ );
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+
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+ ground.rotation.x = - Math.PI / 2; // rotates X/Y to X/Z
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+ ground.receiveShadow = true;
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+ scene.add( ground );
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+
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+ // Stats
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+
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+ stats = new Stats();
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+ document.body.appendChild( stats.dom );
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+
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+ // Renderer
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+
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+ renderer = new THREE.WebGLRenderer( { antialias: true } );
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+ renderer.shadowMap.enabled = true;
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+ renderer.setPixelRatio( window.devicePixelRatio );
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+ renderer.setSize( window.innerWidth, window.innerHeight );
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+ renderer.setClearColor( 0x263238 );
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+ window.addEventListener( 'resize', onWindowResize, false );
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+ document.body.appendChild( renderer.domElement );
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+
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+ // ***** Clipping setup (renderer): *****
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+ var globalPlanes = [ globalPlane ],
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+ Empty = Object.freeze( [] );
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+ renderer.clippingPlanes = Empty; // GUI sets it to globalPlanes
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+ renderer.localClippingEnabled = true;
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+
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+ // Controls
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+
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+ var controls = new THREE.OrbitControls( camera, renderer.domElement );
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+ controls.target.set( 0, 1, 0 );
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+ controls.update();
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+
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+ // GUI
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+
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+ var gui = new dat.GUI(),
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+ folderLocal = gui.addFolder( 'Local Clipping' ),
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+ propsLocal = {
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+
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+ get 'Enabled'() {
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+
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+ return renderer.localClippingEnabled;
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+
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+ },
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+ set 'Enabled'( v ) {
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+
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+ renderer.localClippingEnabled = v;
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+
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+ },
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+
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+ get 'Shadows'() {
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+
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+ return material.clipShadows;
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+
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+ },
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+ set 'Shadows'( v ) {
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+
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+ material.clipShadows = v;
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+
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+ },
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+
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+ get 'Plane'() {
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+
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+ return localPlane.constant;
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+
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+ },
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+ set 'Plane'( v ) {
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+
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+ localPlane.constant = v;
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+
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+ }
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+
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+ };
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+
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+ folderLocal.add( propsLocal, 'Enabled' );
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+ folderLocal.add( propsLocal, 'Shadows' );
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+ folderLocal.add( propsLocal, 'Plane', 0.3, 1.25 );
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+
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+ // Start
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+
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+ startTime = Date.now();
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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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+
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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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+ function animate() {
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+
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+ var currentTime = Date.now();
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+ var time = ( currentTime - startTime ) / 1000;
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+
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+ requestAnimationFrame( animate );
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+
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+ object.position.y = 0.8;
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+ object.rotation.x = time * 0.5;
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+ object.rotation.y = time * 0.2;
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+ object.scale.setScalar( Math.cos( time ) * 0.125 + 0.875 );
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+
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+ stats.begin();
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+ renderer.render( scene, camera );
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+ stats.end();
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+
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+ }
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+
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+ </script>
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+
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+ </body>
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+</html>
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Garrett Johnson