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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 - clipIntersection</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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+
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+
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+ function init() {
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+
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+ camera = new THREE.PerspectiveCamera(
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+ 40, window.innerWidth / window.innerHeight, 1, 800 );
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+
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+ camera.position.set( -20, 10, 50 );
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+ camera.lookAt( new THREE.Vector3( 0, 0, 0) );
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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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+ var light = new THREE.HemisphereLight( 0xffffbb, 0x080820, 1 );
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+ scene.add( light );
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+
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+ var clipPlanes = [ new THREE.Plane( new THREE.Vector3( 1, 0, 0 ), 0 ),
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+ new THREE.Plane( new THREE.Vector3( 0, -1, 0 ), 0 ),
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+ new THREE.Plane( new THREE.Vector3( 0, 0, -1 ), 0 ) ]
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+
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+ scene.add( new THREE.AmbientLight( 0x505050 ) );
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+
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+ balls = new THREE.Object3D();
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+
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+ for ( var i = 1; i < 25; i++ ) {
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+ balls.add( new THREE.Mesh(
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+ new THREE.SphereBufferGeometry( i / 2, 48, 48),
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+ new THREE.MeshStandardMaterial( { color: new THREE.Color( Math.sin( i * 0.5 ) * 0.5 + 0.5,
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+ Math.cos( i * 1.5 ) * 0.5 + 0.5,
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+ Math.sin( i * 4.5 + 0 ) * 0.5 + 0.5 ),
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+ roughness: 0.95, metalness: 0.0, side: THREE.DoubleSide, clippingPlanes: clipPlanes, clipIntersection: true } )
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+ ) );
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+ }
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+
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+ scene.add( balls );
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+
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+ // Renderer
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+
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+ var container = document.body;
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+
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+ renderer = new THREE.WebGLRenderer();
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+ renderer.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.setClearColor( 0x222222 );
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+ renderer.localClippingEnabled = true;
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+
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+ window.addEventListener( 'resize', onWindowResize, false );
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+ container.appendChild( renderer.domElement );
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+
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+
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+ // Stats
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+
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+ stats = new Stats();
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+ container.appendChild( stats.dom );
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+
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+ // GUI
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+
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+ mode = {};
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+ mode.clipIntersection = true;
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+ mode.clipPosition = 0;
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+ var gui = new dat.GUI();
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+ gui.width = 800;
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+ gui.add( mode, 'clipIntersection' ).onChange( function() {
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+ for (var i = 0; i < balls.children.length; i++) {
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+ balls.children[i].material.clipIntersection = !balls.children[i].material.clipIntersection;
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+ }
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+ } );
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+
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+ gui.add( mode, 'clipPosition', -16, 16 ).onChange( function( value ) {
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+
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+ } );
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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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+ // Start
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+
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+ startTime = Date.now();
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+ time = 0;
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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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+
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+ requestAnimationFrame( animate );
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+
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+
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+ for ( var obj = 0; obj < balls.children.length; obj++ ) {
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+ var current = balls.children[ obj ].material;
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+ for ( var i = 0; i < current.clippingPlanes.length; i++ ) {
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+ var plane = current.clippingPlanes[ i ];
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+ plane.constant = ( 49 * plane.constant + mode.clipPosition ) / 50;
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+ }
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+ }
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+
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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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+ init();
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+ animate();
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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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Peter Whidden