javascript
/
three.js
mirror de https://github.com/tazdij/three.js.git


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - THREE.PointLight ShadowMap</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="http://threejs.org" target="_blank" rel="noopener">three.js</a> - THREE.PointLight ShadowMap by <a href="https://github.com/mkkellogg">mkkellogg</a>
		</div>

		<script type="module">

			import * as THREE from '../build/three.module.js';

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

			import { OrbitControls } from './jsm/controls/OrbitControls.js';

			var camera, scene, renderer, stats;
			var pointLight, pointLight2;

			var extraPointLights;

			init();
			animate();

			function init() {

				camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 1000 );
				camera.position.set( 0, 10, 40 );

				scene = new THREE.Scene();
				scene.add( new THREE.AmbientLight( 0x111122 ) );

				// lights

				function createLight( color ) {

					var intensity = 1.5;

					var pointLight = new THREE.PointLight( color, intensity, 20 );
					pointLight.castShadow = true;
					pointLight.shadow.camera.near = 1;
					pointLight.shadow.camera.far = 60;
					pointLight.shadow.bias = - 0.005; // reduces self-shadowing on double-sided objects

					var geometry = new THREE.SphereBufferGeometry( 0.3, 12, 6 );
					var material = new THREE.MeshBasicMaterial( { color: color } );
					material.color.multiplyScalar( intensity );
					var sphere = new THREE.Mesh( geometry, material );
					pointLight.add( sphere );

					var texture = new THREE.CanvasTexture( generateTexture() );
					texture.magFilter = THREE.NearestFilter;
					texture.wrapT = THREE.RepeatWrapping;
					texture.wrapS = THREE.RepeatWrapping;
					texture.repeat.set( 1, 3.5 );

					var geometry = new THREE.SphereBufferGeometry( 2, 32, 8 );
					var material = new THREE.MeshPhongMaterial( {
						side: THREE.DoubleSide,
						alphaMap: texture,
						alphaTest: 0.5
					} );

					var sphere = new THREE.Mesh( geometry, material );
					sphere.castShadow = true;
					sphere.receiveShadow = true;
					pointLight.add( sphere );

					// custom distance material
					var distanceMaterial = new THREE.MeshDistanceMaterial( {
						alphaMap: material.alphaMap,
						alphaTest: material.alphaTest
					} );
					sphere.customDistanceMaterial = distanceMaterial;

					return pointLight;

				}

				pointLight = createLight( 0x0088ff );
				scene.add( pointLight );

				pointLight2 = createLight( 0xff8888 );
				scene.add( pointLight2 );

				// The extra point lights demonstrate that it's possible to have lots of non-shadow-casting lights in
				// the same scene as the shadow casting lights.
				var createExtraLight = function () {

					var pointLight = new THREE.PointLight( 0xffffff, 0.1, 20 );
					pointLight.position.x = ( Math.random() - 0.5 ) * 29;
					pointLight.position.y = ( Math.random() - 0.5 ) * 29;
					pointLight.position.z = ( Math.random() - 0.5 ) * 29;

					var geometry = new THREE.SphereBufferGeometry( 0.1, 10, 6 );
					var material = new THREE.MeshBasicMaterial( { color: 0xffffff } );
					var sphere = new THREE.Mesh( geometry, material );
					pointLight.add( sphere );

					return pointLight;

				};

				var extraPointLights = new THREE.Object3D();
				scene.add( extraPointLights );
				extraPointLights.position.set( 0, 10, 0 );

				for ( var i = 0; i < 20; i ++ ) {

					extraPointLights.add( createExtraLight() );

				}

				//

				var geometry = new THREE.BoxBufferGeometry( 30, 30, 30 );

				var material = new THREE.MeshPhongMaterial( {
					color: 0xa0adaf,
					shininess: 10,
					specular: 0x111111,
					side: THREE.BackSide
				} );

				var mesh = new THREE.Mesh( geometry, material );
				mesh.position.y = 10;
				mesh.receiveShadow = true;
				scene.add( mesh );

				//

				renderer = new THREE.WebGLRenderer( { antialias: true } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.shadowMap.enabled = true;
				renderer.shadowMap.type = THREE.BasicShadowMap;
				document.body.appendChild( renderer.domElement );

				var controls = new OrbitControls( camera, renderer.domElement );
				controls.target.set( 0, 10, 0 );
				controls.update();

				stats = new Stats();
				document.body.appendChild( stats.dom );

				//

				window.addEventListener( 'resize', onWindowResize, false );

			}

			function onWindowResize() {

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

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

			}

			function generateTexture() {

				var canvas = document.createElement( 'canvas' );
				canvas.width = 2;
				canvas.height = 2;

				var context = canvas.getContext( '2d' );
				context.fillStyle = 'white';
				context.fillRect( 0, 1, 2, 1 );

				return canvas;

			}

			function animate() {

				requestAnimationFrame( animate );
				render();

			}

			function render() {

				var time = performance.now() * 0.001;

				pointLight.position.x = Math.sin( time * 0.6 ) * 9;
				pointLight.position.y = Math.sin( time * 0.7 ) * 9 + 5;
				pointLight.position.z = Math.sin( time * 0.8 ) * 9;

				pointLight.rotation.x = time;
				pointLight.rotation.z = time;

				time += 10000;

				pointLight2.position.x = Math.sin( time * 0.6 ) * 9;
				pointLight2.position.y = Math.sin( time * 0.7 ) * 9 + 5;
				pointLight2.position.z = Math.sin( time * 0.8 ) * 9;

				pointLight2.rotation.x = time;
				pointLight2.rotation.z = time;

				renderer.render( scene, camera );

				stats.update();

			}

		</script>
	</body>
</html>