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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgl - clipIntersection</title>
- <meta charset="utf-8">
- <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
- <link type="text/css" rel="stylesheet" href="main.css">
- </head>
- <body>
- <script type="importmap">
- {
- "imports": {
- "three": "../build/three.module.js",
- "three/addons/": "./jsm/"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- let camera, scene, renderer;
- const params = {
- clipIntersection: true,
- planeConstant: 0,
- showHelpers: false,
- alphaToCoverage: true,
- };
- const clipPlanes = [
- new THREE.Plane( new THREE.Vector3( 1, 0, 0 ), 0 ),
- new THREE.Plane( new THREE.Vector3( 0, - 1, 0 ), 0 ),
- new THREE.Plane( new THREE.Vector3( 0, 0, - 1 ), 0 )
- ];
- init();
- render();
- function init() {
- renderer = new THREE.WebGLRenderer( { antialias: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.localClippingEnabled = true;
- document.body.appendChild( renderer.domElement );
- scene = new THREE.Scene();
- camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 200 );
- camera.position.set( - 1.5, 2.5, 3.0 );
- const controls = new OrbitControls( camera, renderer.domElement );
- controls.addEventListener( 'change', render ); // use only if there is no animation loop
- controls.minDistance = 1;
- controls.maxDistance = 10;
- controls.enablePan = false;
- const light = new THREE.HemisphereLight( 0xffffff, 0x080808, 4.5 );
- light.position.set( - 1.25, 1, 1.25 );
- scene.add( light );
- //
- const group = new THREE.Group();
- for ( let i = 1; i <= 30; i += 2 ) {
- const geometry = new THREE.SphereGeometry( i / 30, 48, 24 );
- const material = new THREE.MeshPhongMaterial( {
- color: new THREE.Color().setHSL( Math.random(), 0.5, 0.5, THREE.SRGBColorSpace ),
- side: THREE.DoubleSide,
- clippingPlanes: clipPlanes,
- clipIntersection: params.clipIntersection,
- alphaToCoverage: true,
- } );
- group.add( new THREE.Mesh( geometry, material ) );
- }
- scene.add( group );
- // helpers
- const helpers = new THREE.Group();
- helpers.add( new THREE.PlaneHelper( clipPlanes[ 0 ], 2, 0xff0000 ) );
- helpers.add( new THREE.PlaneHelper( clipPlanes[ 1 ], 2, 0x00ff00 ) );
- helpers.add( new THREE.PlaneHelper( clipPlanes[ 2 ], 2, 0x0000ff ) );
- helpers.visible = false;
- scene.add( helpers );
- // gui
- const gui = new GUI();
- gui.add( params, 'alphaToCoverage' ).onChange( function ( value ) {
- group.children.forEach( c => {
- c.material.alphaToCoverage = Boolean( value );
- c.material.needsUpdate = true;
- } );
- render();
- } );
- gui.add( params, 'clipIntersection' ).name( 'clip intersection' ).onChange( function ( value ) {
- const children = group.children;
- for ( let i = 0; i < children.length; i ++ ) {
- children[ i ].material.clipIntersection = value;
- }
- render();
- } );
- gui.add( params, 'planeConstant', - 1, 1 ).step( 0.01 ).name( 'plane constant' ).onChange( function ( value ) {
- for ( let j = 0; j < clipPlanes.length; j ++ ) {
- clipPlanes[ j ].constant = value;
- }
- render();
- } );
- gui.add( params, 'showHelpers' ).name( 'show helpers' ).onChange( function ( value ) {
- helpers.visible = value;
- render();
- } );
- //
- window.addEventListener( 'resize', onWindowResize );
- }
- function onWindowResize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- render();
- }
- function render() {
- renderer.render( scene, camera );
- }
- </script>
- </body>
- </html>
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