javascript
/
three.js
镜像来自 https://github.com/tazdij/three.js.git


			
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - geometry - text</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>

		<div id="info">
			<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - procedural 3D text<br/>
			type to enter new text, drag to spin the text<br/>
			<button id="color">change color</button>
			<button id="font">change font</button>
			<button id="weight">change weight</button>
			<button id="bevel">change bevel</button><br/>
			<a id="permalink" href="#">permalink</a>
		</div>

		<!-- Import maps polyfill -->
		<!-- Remove this when import maps will be widely supported -->
		<script async src="https://unpkg.com/[email protected]/dist/es-module-shims.js"></script>

		<script type="importmap">
			{
				"imports": {
					"three": "../build/three.module.js"
				}
			}
		</script>

		<script type="module">

			import * as THREE from 'three';

			import { FontLoader } from './jsm/loaders/FontLoader.js';
			import { TextGeometry } from './jsm/geometries/TextGeometry.js';

			import Stats from './jsm/libs/stats.module.js';

			THREE.Cache.enabled = true;

			let container, stats, permalink, hex;

			let camera, cameraTarget, scene, renderer;

			let group, textMesh1, textMesh2, textGeo, materials;

			let firstLetter = true;

			let text = 'three.js',

				bevelEnabled = true,

				font = undefined,

				fontName = 'optimer', // helvetiker, optimer, gentilis, droid sans, droid serif
				fontWeight = 'bold'; // normal bold

			const height = 20,
				size = 70,
				hover = 30,

				curveSegments = 4,

				bevelThickness = 2,
				bevelSize = 1.5;

			const mirror = true;

			const fontMap = {

				'helvetiker': 0,
				'optimer': 1,
				'gentilis': 2,
				'droid/droid_sans': 3,
				'droid/droid_serif': 4

			};

			const weightMap = {

				'regular': 0,
				'bold': 1

			};

			const reverseFontMap = [];
			const reverseWeightMap = [];

			for ( const i in fontMap ) reverseFontMap[ fontMap[ i ] ] = i;
			for ( const i in weightMap ) reverseWeightMap[ weightMap[ i ] ] = i;

			let targetRotation = 0;
			let targetRotationOnPointerDown = 0;

			let pointerX = 0;
			let pointerXOnPointerDown = 0;

			let windowHalfX = window.innerWidth / 2;

			let fontIndex = 1;

			init();
			animate();

			function decimalToHex( d ) {

				let hex = Number( d ).toString( 16 );
				hex = '000000'.substr( 0, 6 - hex.length ) + hex;
				return hex.toUpperCase();

			}

			function init() {

				container = document.createElement( 'div' );
				document.body.appendChild( container );

				permalink = document.getElementById( 'permalink' );

				// CAMERA

				camera = new THREE.PerspectiveCamera( 30, window.innerWidth / window.innerHeight, 1, 1500 );
				camera.position.set( 0, 400, 700 );

				cameraTarget = new THREE.Vector3( 0, 150, 0 );

				// SCENE

				scene = new THREE.Scene();
				scene.background = new THREE.Color( 0x000000 );
				scene.fog = new THREE.Fog( 0x000000, 250, 1400 );

				// LIGHTS

				const dirLight = new THREE.DirectionalLight( 0xffffff, 0.125 );
				dirLight.position.set( 0, 0, 1 ).normalize();
				scene.add( dirLight );

				const pointLight = new THREE.PointLight( 0xffffff, 1.5 );
				pointLight.position.set( 0, 100, 90 );
				scene.add( pointLight );

				// Get text from hash

				const hash = document.location.hash.substr( 1 );

				if ( hash.length !== 0 ) {

					const colorhash = hash.substring( 0, 6 );
					const fonthash = hash.substring( 6, 7 );
					const weighthash = hash.substring( 7, 8 );
					const bevelhash = hash.substring( 8, 9 );
					const texthash = hash.substring( 10 );

					hex = colorhash;
					pointLight.color.setHex( parseInt( colorhash, 16 ) );

					fontName = reverseFontMap[ parseInt( fonthash ) ];
					fontWeight = reverseWeightMap[ parseInt( weighthash ) ];

					bevelEnabled = parseInt( bevelhash );

					text = decodeURI( texthash );

					updatePermalink();

				} else {

					pointLight.color.setHSL( Math.random(), 1, 0.5 );
					hex = decimalToHex( pointLight.color.getHex() );

				}

				materials = [
					new THREE.MeshPhongMaterial( { color: 0xffffff, flatShading: true } ), // front
					new THREE.MeshPhongMaterial( { color: 0xffffff } ) // side
				];

				group = new THREE.Group();
				group.position.y = 100;

				scene.add( group );

				loadFont();

				const plane = new THREE.Mesh(
					new THREE.PlaneGeometry( 10000, 10000 ),
					new THREE.MeshBasicMaterial( { color: 0xffffff, opacity: 0.5, transparent: true } )
				);
				plane.position.y = 100;
				plane.rotation.x = - Math.PI / 2;
				scene.add( plane );

				// RENDERER

				renderer = new THREE.WebGLRenderer( { antialias: true } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				container.appendChild( renderer.domElement );

				// STATS

				stats = new Stats();
				//container.appendChild( stats.dom );

				// EVENTS

				container.style.touchAction = 'none';
				container.addEventListener( 'pointerdown', onPointerDown );

				document.addEventListener( 'keypress', onDocumentKeyPress );
				document.addEventListener( 'keydown', onDocumentKeyDown );

				document.getElementById( 'color' ).addEventListener( 'click', function () {

					pointLight.color.setHSL( Math.random(), 1, 0.5 );
					hex = decimalToHex( pointLight.color.getHex() );

					updatePermalink();

				} );

				document.getElementById( 'font' ).addEventListener( 'click', function () {

					fontIndex ++;

					fontName = reverseFontMap[ fontIndex % reverseFontMap.length ];

					loadFont();

				} );


				document.getElementById( 'weight' ).addEventListener( 'click', function () {

					if ( fontWeight === 'bold' ) {

						fontWeight = 'regular';

					} else {

						fontWeight = 'bold';

					}

					loadFont();

				} );

				document.getElementById( 'bevel' ).addEventListener( 'click', function () {

					bevelEnabled = ! bevelEnabled;

					refreshText();

				} );

				//

				window.addEventListener( 'resize', onWindowResize );

			}

			function onWindowResize() {

				windowHalfX = window.innerWidth / 2;

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

			}

			//

			function boolToNum( b ) {

				return b ? 1 : 0;

			}

			function updatePermalink() {

				const link = hex + fontMap[ fontName ] + weightMap[ fontWeight ] + boolToNum( bevelEnabled ) + '#' + encodeURI( text );

				permalink.href = '#' + link;
				window.location.hash = link;

			}

			function onDocumentKeyDown( event ) {

				if ( firstLetter ) {

					firstLetter = false;
					text = '';

				}

				const keyCode = event.keyCode;

				// backspace

				if ( keyCode == 8 ) {

					event.preventDefault();

					text = text.substring( 0, text.length - 1 );
					refreshText();

					return false;

				}

			}

			function onDocumentKeyPress( event ) {

				const keyCode = event.which;

				// backspace

				if ( keyCode == 8 ) {

					event.preventDefault();

				} else {

					const ch = String.fromCharCode( keyCode );
					text += ch;

					refreshText();

				}

			}

			function loadFont() {

				const loader = new FontLoader();
				loader.load( 'fonts/' + fontName + '_' + fontWeight + '.typeface.json', function ( response ) {

					font = response;

					refreshText();

				} );

			}

			function createText() {

				textGeo = new TextGeometry( text, {

					font: font,

					size: size,
					height: height,
					curveSegments: curveSegments,

					bevelThickness: bevelThickness,
					bevelSize: bevelSize,
					bevelEnabled: bevelEnabled

				} );

				textGeo.computeBoundingBox();

				const centerOffset = - 0.5 * ( textGeo.boundingBox.max.x - textGeo.boundingBox.min.x );

				textMesh1 = new THREE.Mesh( textGeo, materials );

				textMesh1.position.x = centerOffset;
				textMesh1.position.y = hover;
				textMesh1.position.z = 0;

				textMesh1.rotation.x = 0;
				textMesh1.rotation.y = Math.PI * 2;

				group.add( textMesh1 );

				if ( mirror ) {

					textMesh2 = new THREE.Mesh( textGeo, materials );

					textMesh2.position.x = centerOffset;
					textMesh2.position.y = - hover;
					textMesh2.position.z = height;

					textMesh2.rotation.x = Math.PI;
					textMesh2.rotation.y = Math.PI * 2;

					group.add( textMesh2 );

				}

			}

			function refreshText() {

				updatePermalink();

				group.remove( textMesh1 );
				if ( mirror ) group.remove( textMesh2 );

				if ( ! text ) return;

				createText();

			}

			function onPointerDown( event ) {

				if ( event.isPrimary === false ) return;

				pointerXOnPointerDown = event.clientX - windowHalfX;
				targetRotationOnPointerDown = targetRotation;

				document.addEventListener( 'pointermove', onPointerMove );
				document.addEventListener( 'pointerup', onPointerUp );

			}

			function onPointerMove( event ) {

				if ( event.isPrimary === false ) return;

				pointerX = event.clientX - windowHalfX;

				targetRotation = targetRotationOnPointerDown + ( pointerX - pointerXOnPointerDown ) * 0.02;

			}

			function onPointerUp() {

				if ( event.isPrimary === false ) return;

				document.removeEventListener( 'pointermove', onPointerMove );
				document.removeEventListener( 'pointerup', onPointerUp );

			}

			//

			function animate() {

				requestAnimationFrame( animate );

				render();
				stats.update();

			}

			function render() {

				group.rotation.y += ( targetRotation - group.rotation.y ) * 0.05;

				camera.lookAt( cameraTarget );

				renderer.clear();
				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>