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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgl - materials - shaders [lava]</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="container"></div>
- <div id="info"><a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - shader material demo. featuring lava shader by <a href="http://irrlicht.sourceforge.net/phpBB2/viewtopic.php?t=21057" target="_blank" rel="noopener">TheGameMaker</a></div>
- <script id="fragmentShader" type="x-shader/x-fragment">
- uniform float time;
- uniform float fogDensity;
- uniform vec3 fogColor;
- uniform sampler2D texture1;
- uniform sampler2D texture2;
- varying vec2 vUv;
- void main( void ) {
- vec2 position = - 1.0 + 2.0 * vUv;
- vec4 noise = texture2D( texture1, vUv );
- vec2 T1 = vUv + vec2( 1.5, - 1.5 ) * time * 0.02;
- vec2 T2 = vUv + vec2( - 0.5, 2.0 ) * time * 0.01;
- T1.x += noise.x * 2.0;
- T1.y += noise.y * 2.0;
- T2.x -= noise.y * 0.2;
- T2.y += noise.z * 0.2;
- float p = texture2D( texture1, T1 * 2.0 ).a;
- vec4 color = texture2D( texture2, T2 * 2.0 );
- vec4 temp = color * ( vec4( p, p, p, p ) * 2.0 ) + ( color * color - 0.1 );
- if( temp.r > 1.0 ) { temp.bg += clamp( temp.r - 2.0, 0.0, 100.0 ); }
- if( temp.g > 1.0 ) { temp.rb += temp.g - 1.0; }
- if( temp.b > 1.0 ) { temp.rg += temp.b - 1.0; }
- gl_FragColor = temp;
- float depth = gl_FragCoord.z / gl_FragCoord.w;
- const float LOG2 = 1.442695;
- float fogFactor = exp2( - fogDensity * fogDensity * depth * depth * LOG2 );
- fogFactor = 1.0 - clamp( fogFactor, 0.0, 1.0 );
- gl_FragColor = mix( gl_FragColor, vec4( fogColor, gl_FragColor.w ), fogFactor );
- }
- </script>
- <script id="vertexShader" type="x-shader/x-vertex">
- uniform vec2 uvScale;
- varying vec2 vUv;
- void main()
- {
- vUv = uvScale * uv;
- vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );
- gl_Position = projectionMatrix * mvPosition;
- }
- </script>
- <script type="importmap">
- {
- "imports": {
- "three": "../build/three.module.js",
- "three/addons/": "./jsm/"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import { EffectComposer } from 'three/addons/postprocessing/EffectComposer.js';
- import { RenderPass } from 'three/addons/postprocessing/RenderPass.js';
- import { BloomPass } from 'three/addons/postprocessing/BloomPass.js';
- import { OutputPass } from 'three/addons/postprocessing/OutputPass.js';
- let camera, renderer, composer, clock;
- let uniforms, mesh;
- init();
- function init() {
- const container = document.getElementById( 'container' );
- camera = new THREE.PerspectiveCamera( 35, window.innerWidth / window.innerHeight, 1, 3000 );
- camera.position.z = 4;
- const scene = new THREE.Scene();
- clock = new THREE.Clock();
- const textureLoader = new THREE.TextureLoader();
- const cloudTexture = textureLoader.load( 'textures/lava/cloud.png' );
- const lavaTexture = textureLoader.load( 'textures/lava/lavatile.jpg' );
- lavaTexture.colorSpace = THREE.SRGBColorSpace;
- cloudTexture.wrapS = cloudTexture.wrapT = THREE.RepeatWrapping;
- lavaTexture.wrapS = lavaTexture.wrapT = THREE.RepeatWrapping;
- uniforms = {
- 'fogDensity': { value: 0.45 },
- 'fogColor': { value: new THREE.Vector3( 0, 0, 0 ) },
- 'time': { value: 1.0 },
- 'uvScale': { value: new THREE.Vector2( 3.0, 1.0 ) },
- 'texture1': { value: cloudTexture },
- 'texture2': { value: lavaTexture }
- };
- const size = 0.65;
- const material = new THREE.ShaderMaterial( {
- uniforms: uniforms,
- vertexShader: document.getElementById( 'vertexShader' ).textContent,
- fragmentShader: document.getElementById( 'fragmentShader' ).textContent
- } );
- mesh = new THREE.Mesh( new THREE.TorusGeometry( size, 0.3, 30, 30 ), material );
- mesh.rotation.x = 0.3;
- scene.add( mesh );
- //
- renderer = new THREE.WebGLRenderer();
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.setAnimationLoop( animate );
- renderer.autoClear = false;
- container.appendChild( renderer.domElement );
- //
- const renderModel = new RenderPass( scene, camera );
- const effectBloom = new BloomPass( 1.25 );
- const outputPass = new OutputPass();
- composer = new EffectComposer( renderer );
- composer.addPass( renderModel );
- composer.addPass( effectBloom );
- composer.addPass( outputPass );
- //
- window.addEventListener( 'resize', onWindowResize );
- }
- function onWindowResize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- composer.setSize( window.innerWidth, window.innerHeight );
- }
- //
- function animate() {
- const delta = 5 * clock.getDelta();
- uniforms[ 'time' ].value += 0.2 * delta;
- mesh.rotation.y += 0.0125 * delta;
- mesh.rotation.x += 0.05 * delta;
- renderer.clear();
- composer.render( 0.01 );
- }
- </script>
- </body>
- </html>
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