javascript
/
three.js
spogulis no https://github.com/tazdij/three.js.git


			
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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>

		<!-- 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",
					"three/addons/": "./jsm/"
				}
			}
		</script>

		<script type="module">

			import * as THREE from 'three';
			import Stats from 'three/addons/libs/stats.module.js';

			let camera, renderer, clock, scene;

			let uniforms, stats;
			const materials = [];

			init();
			animate();

			function init() {

				const container = document.getElementById( 'container' );

				camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 1, 3000 );
				camera.position.z = 7;

				scene = new THREE.Scene();

				clock = new THREE.Clock();

				const textureLoader = new THREE.TextureLoader();

				uniforms = {

					'fogDensity': { value: 0.001 },
					'fogColor': { value: new THREE.Vector3( 0, 0, 0 ) },
					'time': { value: 1.0 },
					'uvScale': { value: new THREE.Vector2( 3.0, 1.0 ) },
					'texture1': { value: textureLoader.load( 'textures/lava/cloud.png' ) },
					'texture2': { value: textureLoader.load( 'textures/lava/lavatile.jpg' ) }

				};

				uniforms[ 'texture1' ].value.wrapS = uniforms[ 'texture1' ].value.wrapT = THREE.RepeatWrapping;
				uniforms[ 'texture2' ].value.wrapS = uniforms[ 'texture2' ].value.wrapT = THREE.RepeatWrapping;


				//

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

				//

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

				onWindowResize();


				window.addEventListener( 'resize', onWindowResize );

			}

			function onWindowResize() {

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

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

			}

			function removeAllMeshes() {

				for ( let i = scene.children.length - 1; i >= 0; i -- ) {

					const obj = scene.children[ i ];
					scene.remove( obj );
					obj.geometry.dispose();
					obj.material.dispose();

				}

			}

			function addMeshes() {

				removeAllMeshes();
				//reset pseudorandom number
				THREE.MathUtils.seededRandom( 1 );

				const projScreenMatrix = new THREE.Matrix4();
				const frustum = new THREE.Frustum();
				camera.updateMatrixWorld();
				projScreenMatrix.multiplyMatrices( camera.projectionMatrix, camera.matrixWorldInverse );
				frustum.setFromProjectionMatrix( projScreenMatrix );

				const size = 0.65;
				let meshesCount = 0;
				while ( meshesCount < 2500 ) {

					const material = new THREE.ShaderMaterial( {

						uniforms: uniforms,
						vertexShader: document.getElementById( 'vertexShader' ).textContent,
						fragmentShader: document.getElementById( 'fragmentShader' ).textContent

					} );


					const mesh = new THREE.Mesh( new THREE.TorusGeometry( size, 0.3, 30, 30 ), material );

					mesh.position.x = THREE.MathUtils.seededRandom() * 20 - 10;
					mesh.position.y = THREE.MathUtils.seededRandom() * 20 - 10;
					mesh.position.z = THREE.MathUtils.seededRandom() * 20 - 10;
					mesh.rotation.x = THREE.MathUtils.seededRandom() * 2 * Math.PI;
					mesh.rotation.y = THREE.MathUtils.seededRandom() * 2 * Math.PI;
					mesh.scale.x = mesh.scale.y = mesh.scale.z = THREE.MathUtils.seededRandom() * .2 + 0.1;

					mesh.updateMatrixWorld();

					if ( frustum.intersectsObject( mesh ) ) {

						// mesh.rotation.x = 0.3;
						materials.push( material );
						scene.add( mesh );
						meshesCount ++;

					}

				}

			}

			//

			function animate() {

				requestAnimationFrame( animate );

				render();
				stats.update();

			}

			function render() {

				materials.forEach( ( material ) => {

					material.needsUpdate = true;

				} );

				const delta = 5 * clock.getDelta();
				uniforms[ 'time' ].value += 0.2 * delta;

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>