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401 lines
7.9 KiB
HTML
401 lines
7.9 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js webgl - geometry - text</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> - procedural 3D text<br/>
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type to enter new text, drag to spin the text
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</div>
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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 { FontLoader } from 'three/addons/loaders/FontLoader.js';
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import { TextGeometry } from 'three/addons/geometries/TextGeometry.js';
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import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
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THREE.Cache.enabled = true;
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let container;
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let camera, cameraTarget, scene, renderer;
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let group, textMesh1, textMesh2, textGeo, materials;
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let firstLetter = true;
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let text = 'three.js',
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bevelEnabled = true,
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font = undefined,
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fontName = 'optimer', // helvetiker, optimer, gentilis, droid sans, droid serif
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fontWeight = 'bold'; // normal bold
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const depth = 20,
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size = 70,
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hover = 30,
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curveSegments = 4,
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bevelThickness = 2,
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bevelSize = 1.5;
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const mirror = true;
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const fontMap = {
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'helvetiker': 0,
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'optimer': 1,
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'gentilis': 2,
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'droid/droid_sans': 3,
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'droid/droid_serif': 4
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};
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const weightMap = {
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'regular': 0,
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'bold': 1
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};
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const reverseFontMap = [];
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const reverseWeightMap = [];
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for ( const i in fontMap ) reverseFontMap[ fontMap[ i ] ] = i;
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for ( const i in weightMap ) reverseWeightMap[ weightMap[ i ] ] = i;
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let targetRotation = 0;
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let targetRotationOnPointerDown = 0;
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let pointerX = 0;
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let pointerXOnPointerDown = 0;
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let windowHalfX = window.innerWidth / 2;
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let fontIndex = 1;
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init();
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function init() {
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container = document.createElement( 'div' );
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document.body.appendChild( container );
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// CAMERA
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camera = new THREE.PerspectiveCamera( 30, window.innerWidth / window.innerHeight, 1, 1500 );
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camera.position.set( 0, 400, 700 );
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cameraTarget = new THREE.Vector3( 0, 150, 0 );
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// SCENE
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scene = new THREE.Scene();
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scene.background = new THREE.Color( 0x000000 );
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scene.fog = new THREE.Fog( 0x000000, 250, 1400 );
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// LIGHTS
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const dirLight = new THREE.DirectionalLight( 0xffffff, 0.4 );
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dirLight.position.set( 0, 0, 1 ).normalize();
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scene.add( dirLight );
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const pointLight = new THREE.PointLight( 0xffffff, 4.5, 0, 0 );
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pointLight.color.setHSL( Math.random(), 1, 0.5 );
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pointLight.position.set( 0, 100, 90 );
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scene.add( pointLight );
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materials = [
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new THREE.MeshPhongMaterial( { color: 0xffffff, flatShading: true } ), // front
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new THREE.MeshPhongMaterial( { color: 0xffffff } ) // side
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];
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group = new THREE.Group();
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group.position.y = 100;
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scene.add( group );
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loadFont();
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const plane = new THREE.Mesh(
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new THREE.PlaneGeometry( 10000, 10000 ),
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new THREE.MeshBasicMaterial( { color: 0xffffff, opacity: 0.5, transparent: true } )
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);
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plane.position.y = 100;
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plane.rotation.x = - Math.PI / 2;
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scene.add( plane );
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// RENDERER
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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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renderer.setAnimationLoop( animate );
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container.appendChild( renderer.domElement );
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// EVENTS
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container.style.touchAction = 'none';
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container.addEventListener( 'pointerdown', onPointerDown );
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document.addEventListener( 'keypress', onDocumentKeyPress );
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document.addEventListener( 'keydown', onDocumentKeyDown );
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//
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const params = {
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changeColor: function () {
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pointLight.color.setHSL( Math.random(), 1, 0.5 );
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},
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changeFont: function () {
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fontIndex ++;
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fontName = reverseFontMap[ fontIndex % reverseFontMap.length ];
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loadFont();
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},
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changeWeight: function () {
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if ( fontWeight === 'bold' ) {
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fontWeight = 'regular';
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} else {
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fontWeight = 'bold';
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}
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loadFont();
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},
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changeBevel: function () {
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bevelEnabled = ! bevelEnabled;
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refreshText();
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}
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};
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//
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const gui = new GUI();
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gui.add( params, 'changeColor' ).name( 'change color' );
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gui.add( params, 'changeFont' ).name( 'change font' );
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gui.add( params, 'changeWeight' ).name( 'change weight' );
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gui.add( params, 'changeBevel' ).name( 'change bevel' );
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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 onWindowResize() {
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windowHalfX = window.innerWidth / 2;
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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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//
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function onDocumentKeyDown( event ) {
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if ( firstLetter ) {
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firstLetter = false;
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text = '';
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}
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const keyCode = event.keyCode;
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// backspace
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if ( keyCode == 8 ) {
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event.preventDefault();
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text = text.substring( 0, text.length - 1 );
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refreshText();
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return false;
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}
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}
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function onDocumentKeyPress( event ) {
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const keyCode = event.which;
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// backspace
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if ( keyCode == 8 ) {
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event.preventDefault();
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} else {
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const ch = String.fromCharCode( keyCode );
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text += ch;
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refreshText();
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}
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}
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function loadFont() {
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const loader = new FontLoader();
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loader.load( 'fonts/' + fontName + '_' + fontWeight + '.typeface.json', function ( response ) {
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font = response;
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refreshText();
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} );
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}
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function createText() {
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textGeo = new TextGeometry( text, {
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font: font,
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size: size,
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depth: depth,
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curveSegments: curveSegments,
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bevelThickness: bevelThickness,
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bevelSize: bevelSize,
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bevelEnabled: bevelEnabled
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} );
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textGeo.computeBoundingBox();
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const centerOffset = - 0.5 * ( textGeo.boundingBox.max.x - textGeo.boundingBox.min.x );
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textMesh1 = new THREE.Mesh( textGeo, materials );
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textMesh1.position.x = centerOffset;
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textMesh1.position.y = hover;
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textMesh1.position.z = 0;
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textMesh1.rotation.x = 0;
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textMesh1.rotation.y = Math.PI * 2;
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group.add( textMesh1 );
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if ( mirror ) {
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textMesh2 = new THREE.Mesh( textGeo, materials );
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textMesh2.position.x = centerOffset;
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textMesh2.position.y = - hover;
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textMesh2.position.z = depth;
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textMesh2.rotation.x = Math.PI;
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textMesh2.rotation.y = Math.PI * 2;
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group.add( textMesh2 );
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}
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}
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function refreshText() {
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group.remove( textMesh1 );
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if ( mirror ) group.remove( textMesh2 );
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if ( ! text ) return;
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createText();
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}
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function onPointerDown( event ) {
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if ( event.isPrimary === false ) return;
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pointerXOnPointerDown = event.clientX - windowHalfX;
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targetRotationOnPointerDown = targetRotation;
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document.addEventListener( 'pointermove', onPointerMove );
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document.addEventListener( 'pointerup', onPointerUp );
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}
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function onPointerMove( event ) {
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if ( event.isPrimary === false ) return;
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pointerX = event.clientX - windowHalfX;
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targetRotation = targetRotationOnPointerDown + ( pointerX - pointerXOnPointerDown ) * 0.02;
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}
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function onPointerUp( event ) {
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if ( event.isPrimary === false ) return;
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document.removeEventListener( 'pointermove', onPointerMove );
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document.removeEventListener( 'pointerup', onPointerUp );
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}
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//
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function animate() {
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group.rotation.y += ( targetRotation - group.rotation.y ) * 0.05;
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camera.lookAt( cameraTarget );
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renderer.clear();
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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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