javascript
/
three.js
réplica de https://github.com/tazdij/three.js.git


			
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - custom attributes</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> - custom attributes example</div>
		<div id="container"></div>

		<script src="../build/three.js"></script>

		<script src="js/WebGL.js"></script>
		<script src="js/libs/stats.min.js"></script>

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

			uniform float amplitude;

			attribute float displacement;

			varying vec3 vNormal;
			varying vec2 vUv;

			void main() {

				vNormal = normal;
				vUv = ( 0.5 + amplitude ) * uv + vec2( amplitude );

				vec3 newPosition = position + amplitude * normal * vec3( displacement );
				gl_Position = projectionMatrix * modelViewMatrix * vec4( newPosition, 1.0 );

			}

		</script>

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

			varying vec3 vNormal;
			varying vec2 vUv;

			uniform vec3 color;
			uniform sampler2D texture;

			void main() {

				vec3 light = vec3( 0.5, 0.2, 1.0 );
				light = normalize( light );

				float dProd = dot( vNormal, light ) * 0.5 + 0.5;

				vec4 tcolor = texture2D( texture, vUv );
				vec4 gray = vec4( vec3( tcolor.r * 0.3 + tcolor.g * 0.59 + tcolor.b * 0.11 ), 1.0 );

				gl_FragColor = gray * vec4( vec3( dProd ) * vec3( color ), 1.0 );

			}

		</script>


		<script>

		if ( WEBGL.isWebGLAvailable() === false ) {

			document.body.appendChild( WEBGL.getWebGLErrorMessage() );

		}

		var renderer, scene, camera, stats;

		var sphere, uniforms;

		var displacement, noise;

		init();
		animate();

		function init() {

			camera = new THREE.PerspectiveCamera( 30, window.innerWidth / window.innerHeight, 1, 10000 );
			camera.position.z = 300;

			scene = new THREE.Scene();
			scene.background = new THREE.Color( 0x050505 );

			uniforms = {

				"amplitude": { value: 1.0 },
				"color": { value: new THREE.Color( 0xff2200 ) },
				"texture": { value: new THREE.TextureLoader().load( "textures/water.jpg" ) }

			};

			uniforms[ "texture" ].value.wrapS = uniforms[ "texture" ].value.wrapT = THREE.RepeatWrapping;

			var shaderMaterial = new THREE.ShaderMaterial( {

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

			} );


			var radius = 50, segments = 128, rings = 64;

			var geometry = new THREE.SphereBufferGeometry( radius, segments, rings );

			displacement = new Float32Array( geometry.attributes.position.count );
			noise = new Float32Array( geometry.attributes.position.count );

			for ( var i = 0; i < displacement.length; i ++ ) {

				noise[ i ] = Math.random() * 5;

			}

			geometry.addAttribute( 'displacement', new THREE.BufferAttribute( displacement, 1 ) );

			sphere = new THREE.Mesh( geometry, shaderMaterial );
			scene.add( sphere );

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

			var container = document.getElementById( 'container' );
			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 = Date.now() * 0.01;

			sphere.rotation.y = sphere.rotation.z = 0.01 * time;

			uniforms[ "amplitude" ].value = 2.5 * Math.sin( sphere.rotation.y * 0.125 );
			uniforms[ "color" ].value.offsetHSL( 0.0005, 0, 0 );

			for ( var i = 0; i < displacement.length; i ++ ) {

				displacement[ i ] = Math.sin( 0.1 * i + time );

				noise[ i ] += 0.5 * ( 0.5 - Math.random() );
				noise[ i ] = THREE.Math.clamp( noise[ i ], - 5, 5 );

				displacement[ i ] += noise[ i ];

			}

			sphere.geometry.attributes.displacement.needsUpdate = true;

			renderer.render( scene, camera );

		}


	</script>

</body>

</html>