javascript
/
three.js
zrcadlo https://github.com/tazdij/three.js.git


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - materials - shaders [Fresnel]</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> - webgl cube Fresnel shader demo.<br/>texture by <a href="http://www.humus.name/index.php?page=Textures" target="_blank" rel="noopener">Humus</a>
		</div>

		<script type="module">
			import {
				CubeTextureLoader,
				Mesh,
				PerspectiveCamera,
				RGBFormat,
				Scene,
				ShaderMaterial,
				SphereBufferGeometry,
				UniformsUtils,
				WebGLRenderer,
			} from "../build/three.module.js";

			import { FresnelShader } from './jsm/shaders/FresnelShader.js';

			var container;

			var camera, scene, renderer;

			var spheres = [];

			var mouseX = 0, mouseY = 0;

			var windowHalfX = window.innerWidth / 2;
			var windowHalfY = window.innerHeight / 2;

			document.addEventListener( 'mousemove', onDocumentMouseMove, false );

			init();
			animate();

			function init() {

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

				camera = new PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 1, 100000 );
				camera.position.z = 3200;

				//

				var path = "textures/cube/Park2/";
				var format = '.jpg';
				var urls = [
					path + 'posx' + format, path + 'negx' + format,
					path + 'posy' + format, path + 'negy' + format,
					path + 'posz' + format, path + 'negz' + format
				];

				var textureCube = new CubeTextureLoader().load( urls );
				textureCube.format = RGBFormat;

				scene = new Scene();
				scene.background = textureCube;

				//

				var geometry = new SphereBufferGeometry( 100, 32, 16 );

				var shader = FresnelShader;
				var uniforms = UniformsUtils.clone( shader.uniforms );

				uniforms[ "tCube" ].value = textureCube;

				var material = new ShaderMaterial( {
					uniforms: uniforms,
					vertexShader: shader.vertexShader,
					fragmentShader: shader.fragmentShader
				} );

				for ( var i = 0; i < 500; i ++ ) {

					var mesh = new Mesh( geometry, material );

					mesh.position.x = Math.random() * 10000 - 5000;
					mesh.position.y = Math.random() * 10000 - 5000;
					mesh.position.z = Math.random() * 10000 - 5000;

					mesh.scale.x = mesh.scale.y = mesh.scale.z = Math.random() * 3 + 1;

					scene.add( mesh );

					spheres.push( mesh );

				}

				//

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

				//

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

			}

			function onWindowResize() {

				windowHalfX = window.innerWidth / 2;
				windowHalfY = window.innerHeight / 2;

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

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

			}

			function onDocumentMouseMove( event ) {

				mouseX = ( event.clientX - windowHalfX ) * 10;
				mouseY = ( event.clientY - windowHalfY ) * 10;

			}

			//

			function animate() {

				requestAnimationFrame( animate );

				render();

			}

			function render() {

				var timer = 0.0001 * Date.now();

				camera.position.x += ( mouseX - camera.position.x ) * .05;
				camera.position.y += ( - mouseY - camera.position.y ) * .05;

				camera.lookAt( scene.position );

				for ( var i = 0, il = spheres.length; i < il; i ++ ) {

					var sphere = spheres[ i ];

					sphere.position.x = 5000 * Math.cos( timer + i );
					sphere.position.y = 5000 * Math.sin( timer + i * 1.1 );

				}

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>