javascript
/
three.js
mirror of https://github.com/tazdij/three.js.git


			
				
					
						
						
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188
							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - raw shader</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="http://threejs.org" target="_blank" rel="noopener">three.js</a> - raw shader demo</div>

		<script id="vertexShader" type="x-shader/x-vertex">

			precision mediump float;
			precision mediump int;

			uniform mat4 modelViewMatrix; // optional
			uniform mat4 projectionMatrix; // optional

			attribute vec3 position;
			attribute vec4 color;

			varying vec3 vPosition;
			varying vec4 vColor;

			void main()	{

				vPosition = position;
				vColor = color;

				gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );

			}

		</script>

		<script id="fragmentShader" type="x-shader/x-fragment">

			precision mediump float;
			precision mediump int;

			uniform float time;

			varying vec3 vPosition;
			varying vec4 vColor;

			void main()	{

				vec4 color = vec4( vColor );
				color.r += sin( vPosition.x * 10.0 + time ) * 0.5;

				gl_FragColor = color;

			}

		</script>

		<script type="module">
			import {
				BufferGeometry,
				Color,
				DoubleSide,
				Float32BufferAttribute,
				Mesh,
				PerspectiveCamera,
				RawShaderMaterial,
				Scene,
				Uint8BufferAttribute,
				WebGLRenderer
			} from "../build/three.module.js";

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

			var container, stats;

			var camera, scene, renderer;

			init();
			animate();

			function init() {

				container = document.getElementById( 'container' );

				camera = new PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 10 );
				camera.position.z = 2;

				scene = new Scene();
				scene.background = new Color( 0x101010 );

				// geometry

				var triangles = 500;

				var geometry = new BufferGeometry();

				var positions = [];
				var colors = [];

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

					positions.push( Math.random() - 0.5 );
					positions.push( Math.random() - 0.5 );
					positions.push( Math.random() - 0.5 );

					colors.push( Math.random() * 255 );
					colors.push( Math.random() * 255 );
					colors.push( Math.random() * 255 );
					colors.push( Math.random() * 255 );

				}

				var positionAttribute = new Float32BufferAttribute( positions, 3 );
				var colorAttribute = new Uint8BufferAttribute( colors, 4 );

				colorAttribute.normalized = true; // this will map the buffer values to 0.0f - +1.0f in the shader

				geometry.addAttribute( 'position', positionAttribute );
				geometry.addAttribute( 'color', colorAttribute );

				// material

				var material = new RawShaderMaterial( {

					uniforms: {
						time: { value: 1.0 }
					},
					vertexShader: document.getElementById( 'vertexShader' ).textContent,
					fragmentShader: document.getElementById( 'fragmentShader' ).textContent,
					side: DoubleSide,
					transparent: true

				} );

				var mesh = new Mesh( geometry, material );
				scene.add( mesh );

				renderer = new WebGLRenderer();
				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, false );

			}

			function onWindowResize() {

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

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

			}

			//

			function animate() {

				requestAnimationFrame( animate );

				render();
				stats.update();

			}

			function render() {

				var time = performance.now();

				var object = scene.children[ 0 ];

				object.rotation.y = time * 0.0005;
				object.material.uniforms.time.value = time * 0.005;

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>