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webgl_clipping_intersection.html
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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="module">
import * as THREE from '../build/three.module.js';
import { GUI } from './jsm/libs/dat.gui.module.js';
import { OrbitControls } from './jsm/controls/OrbitControls.js';
var camera, scene, renderer;
var params = {
clipIntersection: true,
planeConstant: 0,
showHelpers: false
};
var 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 );
var 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;
var light = new THREE.HemisphereLight( 0xffffff, 0x080808, 1.5 );
light.position.set( - 1.25, 1, 1.25 );
scene.add( light );
// var helper = new CameraHelper( light.shadow.camera );
// scene.add( helper );
//
var group = new THREE.Group();
for ( var i = 1; i <= 30; i += 2 ) {
var geometry = new THREE.SphereBufferGeometry( i / 30, 48, 24 );
var material = new THREE.MeshLambertMaterial( {
color: new THREE.Color().setHSL( Math.random(), 0.5, 0.5 ),
side: THREE.DoubleSide,
clippingPlanes: clipPlanes,
clipIntersection: params.clipIntersection
} );
group.add( new THREE.Mesh( geometry, material ) );
}
scene.add( group );
// helpers
var 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
var gui = new GUI();
gui.add( params, 'clipIntersection' ).name( 'clip intersection' ).onChange( function ( value ) {
var children = group.children;
for ( var 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 ( var 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, false );
}
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>