javascript
/
three.js
镜像自地址 https://github.com/tazdij/three.js.git


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - material instance uniform</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> - webgl material instance uniform
		</div>

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

			import * as THREE from 'three';

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

			import { nodeFrame } from './jsm/renderers/webgl/nodes/WebGLNodes.js';

			import * as Nodes from './jsm/renderers/nodes/Nodes.js';

			class InstanceUniformNode extends Nodes.Node {

				constructor() {

					super( 'vec3' );

					this.updateType = Nodes.NodeUpdateType.Object;

					this.inputNode = new Nodes.ColorNode();

				}

				update( frame ) {

					const rendererState = frame.renderer.state;
					const mesh = frame.object;

					const meshColor = mesh.color;

					this.inputNode.value.copy( meshColor );

					// force refresh material uniforms
					rendererState.useProgram( null );

				}

				generate( builder, output ) {

					return this.inputNode.build( builder, output );

				}

			}

			let stats;

			let camera, scene, renderer;
			let pointLight;

			const objects = [];

			init();
			animate();

			function init() {

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

				camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 2000 );
				camera.position.set( 0, 200, 800 );

				scene = new THREE.Scene();

				// Grid

				const helper = new THREE.GridHelper( 1000, 40, 0x303030, 0x303030 );
				helper.position.y = - 75;
				scene.add( helper );

				// Material

				const instanceUniform = new InstanceUniformNode();

				const material = new THREE.MeshStandardMaterial();
				material.colorNode = instanceUniform;

				// Spheres geometry

				const geometry = new THREE.SphereGeometry( 70, 32, 16 );

				for ( let i = 0, l = 12; i < l; i ++ ) {

					addMesh( geometry, material );

				}

				// Lights

				scene.add( new THREE.AmbientLight( 0x111111 ) );

				const directionalLight = new THREE.DirectionalLight( 0xffffff, 0.125 );

				directionalLight.position.x = Math.random() - 0.5;
				directionalLight.position.y = Math.random() - 0.5;
				directionalLight.position.z = Math.random() - 0.5;
				directionalLight.position.normalize();

				scene.add( directionalLight );

				pointLight = new THREE.PointLight( 0xffffff, 1 );
				scene.add( pointLight );

				pointLight.add( new THREE.Mesh( new THREE.SphereGeometry( 4, 8, 8 ), new THREE.MeshBasicMaterial( { color: 0xffffff } ) ) );

				//

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

				//

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

				//

				window.addEventListener( 'resize', onWindowResize );

			}

			function addMesh( geometry, material ) {

				const mesh = new THREE.Mesh( geometry, material );

				mesh.color = new THREE.Color( Math.random() * 0xffffff );

				mesh.position.x = ( objects.length % 4 ) * 200 - 400;
				mesh.position.z = Math.floor( objects.length / 4 ) * 200 - 200;

				mesh.rotation.x = Math.random() * 200 - 100;
				mesh.rotation.y = Math.random() * 200 - 100;
				mesh.rotation.z = Math.random() * 200 - 100;

				objects.push( mesh );

				scene.add( mesh );

			}

			function onWindowResize() {

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

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

			}

			//

			function animate() {

				requestAnimationFrame( animate );

				nodeFrame.update();

				render();
				stats.update();

			}

			function render() {

				const timer = 0.0001 * Date.now();

				camera.position.x = Math.cos( timer ) * 1000;
				camera.position.z = Math.sin( timer ) * 1000;

				camera.lookAt( scene.position );

				for ( let i = 0, l = objects.length; i < l; i ++ ) {

					const object = objects[ i ];

					object.rotation.x += 0.01;
					object.rotation.y += 0.005;

				}

				pointLight.position.x = Math.sin( timer * 7 ) * 300;
				pointLight.position.y = Math.cos( timer * 5 ) * 400;
				pointLight.position.z = Math.cos( timer * 3 ) * 300;

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>