examples/webgl_materials_modified.html

<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - materials - modified</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<style>
			body {
				background:#000;
				color:#fff;
				padding:0;
				margin:0;
				font-weight: bold;
				overflow:hidden;
			}

			a {
				color: #ffffff;
			}

			#info {
				position: absolute;
				top: 0px; width: 100%;
				color: #ffffff;
				padding: 5px;
				font-family:Monospace;
				font-size:13px;
				text-align:center;
				z-index:1000;
			}

			#oldie {
				background:rgb(200,100,0) !important;
				color:#fff;
			}

		</style>
	</head>

	<body>
		<div id="info">
			<a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> wegbl - modified material.
			<a href="http://graphics.cs.williams.edu/data/meshes.xml#14" target="_blank" rel="noopener">Lee Perry-Smith</a> head.
		</div>

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

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

		<script src="js/shaders/BleachBypassShader.js"></script>
		<script src="js/shaders/ColorCorrectionShader.js"></script>
		<script src="js/shaders/CopyShader.js"></script>
		<script src="js/shaders/FXAAShader.js"></script>

		<script src="js/postprocessing/EffectComposer.js"></script>
		<script src="js/postprocessing/RenderPass.js"></script>
		<script src="js/postprocessing/ShaderPass.js"></script>
		<script src="js/postprocessing/MaskPass.js"></script>

		<script>

			if ( ! Detector.webgl ) Detector.addGetWebGLMessage();

			var container, stats, loader;

			var camera, scene, renderer;

			var mesh, materialShader;

			var mouseX = 0;
			var mouseY = 0;

			var targetX = 0;
			var targetY = 0;

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

			init();
			animate();

			function init() {

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

				camera = new THREE.PerspectiveCamera( 27, window.innerWidth / window.innerHeight, 1, 10000 );
				camera.position.z = 1200;

				scene = new THREE.Scene();

				var material = new THREE.MeshNormalMaterial();
				material.onBeforeCompile = function ( shader ) {

					// console.log( shader )

					shader.uniforms.time = { value: 0 };

					shader.vertexShader = 'uniform float time;\n' + shader.vertexShader;
					shader.vertexShader = shader.vertexShader.replace(
						'#include <begin_vertex>',
						[
							'float theta = sin( time + position.y ) / 2.0;',
							'float c = cos( theta );',
							'float s = sin( theta );',
							'mat3 m = mat3( c, 0, s, 0, 1, 0, -s, 0, c );',
							'vec3 transformed = vec3( position ) * m;',
							'vNormal = vNormal * m;'
						].join( '\n' )
					);

					materialShader = shader;

				};

				loader = new THREE.JSONLoader();
				loader.load( "obj/leeperrysmith/LeePerrySmith.js", function( geometry ) {

					mesh = new THREE.Mesh( geometry, material );
					mesh.position.y = - 50;
					mesh.scale.setScalar( 100 );
					scene.add( mesh );

				} );

				renderer = new THREE.WebGLRenderer( { antialias: false } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				container.appendChild( renderer.domElement );

				//

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

				// EVENTS

				document.addEventListener( 'mousemove', onDocumentMouseMove, false );
				window.addEventListener( 'resize', onWindowResize, false );

			}

			//

			function onWindowResize( event ) {

				var width = window.innerWidth;
				var height = window.innerHeight;

				camera.aspect = width / height;
				camera.updateProjectionMatrix();

				renderer.setSize( width, height );

			}

			function onDocumentMouseMove( event ) {

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

			}

			//

			function animate() {

				requestAnimationFrame( animate );

				render();

				stats.update();

			}

			function render() {

				targetX = mouseX * .001;
				targetY = mouseY * .001;

				if ( mesh ) {

					mesh.rotation.y += 0.05 * ( targetX - mesh.rotation.y );
					mesh.rotation.x += 0.05 * ( targetY - mesh.rotation.x );

				}

				if ( materialShader ) {

					materialShader.uniforms.time.value = performance.now() / 1000;

				}

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>