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200 lines
4.4 KiB
200 lines
4.4 KiB
3 years ago
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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 - materials - wireframe</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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<link type="text/css" rel="stylesheet" href="main.css">
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</head>
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<body>
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<div id="info">
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - materials - wireframe
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</div>
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<script type="x-shader/x-vertex" id="vertexShader">
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attribute vec3 center;
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varying vec3 vCenter;
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void main() {
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vCenter = center;
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gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
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}
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</script>
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<script type="x-shader/x-fragment" id="fragmentShader">
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uniform float thickness;
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varying vec3 vCenter;
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void main() {
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vec3 afwidth = fwidth( vCenter.xyz );
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vec3 edge3 = smoothstep( ( thickness - 1.0 ) * afwidth, thickness * afwidth, vCenter.xyz );
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float edge = 1.0 - min( min( edge3.x, edge3.y ), edge3.z );
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gl_FragColor.rgb = gl_FrontFacing ? vec3( 0.9, 0.9, 1.0 ) : vec3( 0.4, 0.4, 0.5 );
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gl_FragColor.a = edge;
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}
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</script>
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<!-- Import maps polyfill -->
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<!-- Remove this when import maps will be widely supported -->
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<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
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<script type="importmap">
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{
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"imports": {
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"three": "../build/three.module.js",
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"three/addons/": "./jsm/"
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}
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}
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</script>
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<script type="module">
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import * as THREE from 'three';
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import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
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const API = {
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thickness: 1
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};
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let renderer, scene, camera, mesh2;
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init();
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function init() {
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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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document.body.appendChild( renderer.domElement );
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scene = new THREE.Scene();
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camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 500 );
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camera.position.z = 200;
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const controls = new OrbitControls( camera, renderer.domElement );
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controls.enablePan = false;
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controls.enableZoom = false;
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new THREE.BufferGeometryLoader().load( 'models/json/WaltHeadLo_buffergeometry.json', function ( geometry ) {
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geometry.deleteAttribute( 'normal' );
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geometry.deleteAttribute( 'uv' );
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setupAttributes( geometry );
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// left
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const material1 = new THREE.MeshBasicMaterial( {
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color: 0xe0e0ff,
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wireframe: true
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} );
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const mesh1 = new THREE.Mesh( geometry, material1 );
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mesh1.position.set( - 40, 0, 0 );
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scene.add( mesh1 );
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// right
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const material2 = new THREE.ShaderMaterial( {
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uniforms: { 'thickness': { value: API.thickness } },
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vertexShader: document.getElementById( 'vertexShader' ).textContent,
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fragmentShader: document.getElementById( 'fragmentShader' ).textContent,
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side: THREE.DoubleSide,
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alphaToCoverage: true // only works when WebGLRenderer's "antialias" is set to "true"
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} );
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material2.extensions.derivatives = true;
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mesh2 = new THREE.Mesh( geometry, material2 );
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mesh2.position.set( 40, 0, 0 );
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scene.add( mesh2 );
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//
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animate();
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} );
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//
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const gui = new GUI();
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gui.add( API, 'thickness', 0, 4 ).onChange( function () {
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mesh2.material.uniforms.thickness.value = API.thickness;
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} );
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gui.open();
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//
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window.addEventListener( 'resize', onWindowResize );
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}
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function setupAttributes( geometry ) {
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const vectors = [
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new THREE.Vector3( 1, 0, 0 ),
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new THREE.Vector3( 0, 1, 0 ),
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new THREE.Vector3( 0, 0, 1 )
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];
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const position = geometry.attributes.position;
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const centers = new Float32Array( position.count * 3 );
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for ( let i = 0, l = position.count; i < l; i ++ ) {
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vectors[ i % 3 ].toArray( centers, i * 3 );
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}
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geometry.setAttribute( 'center', new THREE.BufferAttribute( centers, 3 ) );
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}
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function onWindowResize() {
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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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function animate() {
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requestAnimationFrame( animate );
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renderer.render( scene, camera );
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}
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</script>
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</body>
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</html>
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