three实现三维立体可调参数云朵效果代码-html代码-BFW代码库

代码语言：html

所属分类：三维

代码描述：three实现三维立体可调参数云朵效果代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en">
	<head>

		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
	
	</head>

	<body>
		<div id="info">
			
		</div>

		<!-- Import maps polyfill -->
		<!-- Remove this when import maps will be widely supported -->
		<script async type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/es-module-shims.1.3.6.js"></script>


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

		<script type="module">

			import * as THREE from 'three';

			import Stats from '//repo.bfw.wiki/bfwtool/examples/jsm/libs/stats.module.js';
			import { OrbitControls } from '//repo.bfw.wiki/bfwtool/examples/jsm/controls/OrbitControls.js';
			import { ImprovedNoise } from '//repo.bfw.wiki/bfwtool/examples/jsm/math/ImprovedNoise.js';

			import { GUI } from '//repo.bfw.wiki/bfwtool/examples/jsm/libs/lil-gui.module.min.js';
			import WebGL from '//repo.bfw.wiki/bfwtool/examples/jsm/capabilities/WebGL.js';

			if ( WebGL.isWebGL2Available() === false ) {

				document.body.appendChild( WebGL.getWebGL2ErrorMessage() );

			}

			let renderer, scene, camera;
			let mesh;

			init();
			animate();

			function init() {

				renderer = new THREE.WebGLRenderer();
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				document.body.appendChild( renderer.domElement );

				scene = new THREE.Scene();

				camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 0.1, 100 );
				camera.position.set( 0, 0, 1.5 );

				new OrbitControls( camera, renderer.domElement );

				// Sky

				const canvas = document.createElement( 'canvas' );
				canvas.width = 1;
				canvas.height = 32;

				const context = canvas.getContext( '2d' );
				const gradient = context.createLinearGradient( 0, 0, 0, 32 );
				gradient.addColorStop( 0.0, '#014a84' );
				gradient.addColorStop( 0.5, '#0561a0' );
				gradient.addColorStop( 1.0, '#437ab6' );
				context.fillStyle = gradient;
				context.fillRect( 0, 0, 1, 32 );

				const sky = new THREE.Mesh(
					new THREE.SphereGeometry( 10 ),
					new THREE.MeshBasicMaterial( { map: new THREE.CanvasTexture( canvas ), side: THREE.BackSide } )
				);
				scene.add( sky );

				// Texture

				const size = 128;
				const data = new Uint8Array( size * size * size );

				let i = 0;
				const scale = 0.05;
				const perlin = new ImprovedNoise();
				const vector = new THREE.Vector3();

				for ( let z = 0; z < size; z ++ ) {

					for ( let y = 0; y < size; y ++ ) {

						for ( let x = 0; x < size; x ++ ) {

							const d = 1.0 - vector.set( x, y, z ).subScalar( size / 2 ).divideScalar( size ).length();
							data[ i ] = ( 128 + 128 * perlin.noise( x * scale / 1.5, y * scale, z * scale / 1.5 ) ) * d * d;
							i ++;

						}

					}

				}

				const texture = new THREE.Data3DTexture( data, size, size, size );
				texture.format = THREE.RedFormat;
				texture.minFilter = THREE.LinearFilter;
				texture.magFilter = THREE.LinearFilter;
				texture.unpackAlignment = 1;
				texture.needsUpdate = true;

				// Material

				const vertexShader = /* glsl */`
					in vec3 position;

					uniform mat4 modelMatrix;
					uniform mat4 modelViewMatrix;
					uniform mat4 projectionMatrix;
					uniform vec3 cameraPos;

					out vec3 vOrigin;
					out vec3 vDirection;

					void main() {
						vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );

						vOrigin = vec3( inverse( modelMatrix ) * vec4( cameraPos, 1.0 ) ).xyz;
						vDirection = position - vOrigin;

						gl_Position = projectionMatrix * mvPosition;
					}
				`;

				const fragmentShader = /* glsl */`
					precision highp float;
					precision highp sampler3D;

					uniform mat4 modelViewMatrix;
					uniform mat4 projectionMatrix;

					in vec3 vOrigin;
					in vec3 vDirection;

					out vec4 color;

					uniform vec3 base;
					uniform sampler3D map;

					uniform float threshold;
					uniform float .........完整代码请登录后点击上方下载按钮下载查看