javascript
/
three.js
зеркало из https://github.com/tazdij/three.js.git


			
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - modifier - Subdivisions using Loop Subdivision Scheme</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">
		<style>
			body {
				background-color: #f0f0f0;
				color: #444;
			}
			a {
				color: #08f;
			}
		</style>
	</head>
	<body>

		<script src="../build/three.js"></script>
		<script src="js/controls/OrbitControls.js"></script>
		<script src="js/modifiers/SubdivisionModifier.js"></script>
		<script src="js/libs/stats.min.js"></script>
		<script src="js/WebGL.js"></script>

		<script>

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

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

			}

			var container, stats;

			var camera, scene, renderer;

			var cube, mesh, material, geometry, smooth, group;

			// Create new object by parameters

			var createSomething = function ( klass, args ) {

				var F = function ( klass, args ) {

					return klass.apply( this, args );

				};

				F.prototype = klass.prototype;

				return new F( klass, args );

			};

			var wireframeMaterial = new THREE.MeshBasicMaterial( { color: 0x000000, wireframe: true, opacity: 0.15, transparent: true } );
			var material = new THREE.MeshBasicMaterial( { color: 0xffffff, wireframe: true } );
			var smoothMaterial = new THREE.MeshPhongMaterial( { color: 0xffffff, flatShading: true, vertexColors: THREE.VertexColors } );

			// Cube

			var materials = [];

			for ( var i = 0; i < 6; i ++ ) {

				materials.push( [ new THREE.MeshBasicMaterial( { color: Math.random() * 0xffffff, wireframe: false } ) ] );

			}


			var geometriesParams = [

				{ type: 'BoxGeometry', args: [ 200, 200, 200, 2, 2, 2, materials ] },
				{ type: 'TorusGeometry', args: [ 100, 60, 4, 8, Math.PI * 2 ] },
				{ type: 'TorusKnotGeometry', args: [ 100, 30 ], scale: 0.25, meshScale: 4 },
				{ type: 'SphereGeometry', args: [ 100, 3, 3 ], meshScale: 2 },
				{ type: 'IcosahedronGeometry', args: [ 100, 1 ], meshScale: 2 },
				{ type: 'CylinderGeometry', args: [ 25, 75, 200, 8, 3 ] },
				{ type: 'OctahedronGeometry', args: [ 200, 0 ], meshScale: 2 },
				{ type: 'LatheGeometry', args: [[
					new THREE.Vector2( 0, 0 ),
					new THREE.Vector2( 50, 50 ),
					new THREE.Vector2( 10, 100 ),
					new THREE.Vector2( 50, 150 ),
					new THREE.Vector2( 0, 200 ) ]] },
				{ type: 'TextGeometry', args: [ '&', {
					size: 200,
					height: 50,
					curveSegments: 1
				} ] },
				{ type: 'PlaneGeometry', args: [ 200, 200, 4, 4 ] }

			];

			var loader = new THREE.FontLoader();
			loader.load( 'fonts/helvetiker_regular.typeface.json', function ( font ) {

				geometriesParams[ 8 ].args[ 1 ].font = font;

			} );

			var loader = new THREE.BufferGeometryLoader();
			loader.load( 'models/json/WaltHeadLo_buffergeometry.json', function ( geometry ) {

				geometry = new THREE.Geometry().fromBufferGeometry( geometry );

				geometriesParams.push( { type: 'WaltHead', args: [ ], meshScale: 6 } );

				THREE.WaltHead = function () {

					return geometry.clone();

				};

				updateInfo();

			} );

			var loader2 = new THREE.BufferGeometryLoader();
			loader2.load( 'models/json/suzanne_buffergeometry.json', function ( geometry ) {

				geometry = new THREE.Geometry().fromBufferGeometry( geometry );

				geometriesParams.push( { type: 'Suzanne', args: [ ], scale: 100, meshScale: 2 } );

				THREE.Suzanne = function () {

					return geometry.clone();

				};

				updateInfo();

			} );


			var info;
			var subdivisions = 2;
			var geometryIndex = 0;

			// start scene

			init();
			animate();

			function nextSubdivision( x ) {

				subdivisions = Math.max( 0, subdivisions + x );
				addStuff();

			}

			function nextGeometry() {

				geometryIndex ++;

				if ( geometryIndex > geometriesParams.length - 1 ) {

					geometryIndex = 0;

				}

				addStuff();

			}

			function switchGeometry( i ) {

				geometryIndex = i;

				addStuff();

			}

			function updateInfo() {

				var params = geometriesParams[ geometryIndex ];

				var dropdown = '<select id="dropdown" onchange="switchGeometry(this.value)">';

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

					dropdown += '<option value="' + i + '"';

					dropdown += ( geometryIndex == i ) ? ' selected' : '';

					dropdown += '>' + geometriesParams[ i ].type + '</option>';

				}

				dropdown += '</select>';

				info.innerHTML = 'Drag to spin THREE.' + params.type +

					'<br><br>Subdivisions: ' + subdivisions +
					' <a href="#" onclick="nextSubdivision(1); return false;">more</a>/<a href="#" onclick="nextSubdivision(-1); return false;">less</a>' +
					'<br>Geometry: ' + dropdown + ' <a href="#" onclick="nextGeometry();return false;">next</a>' +
					'<br><br>Vertices count: before ' + geometry.vertices.length + ' after ' + smooth.vertices.length +
					'<br>Face count: before ' + geometry.faces.length + ' after ' + smooth.faces.length;

			}

			function addStuff() {

				if ( cube !== undefined ) {

					geometry.dispose();
					smooth.dispose();

					scene.remove( group );
					scene.remove( cube );

				}

				var modifier = new THREE.SubdivisionModifier( subdivisions );

				var params = geometriesParams[ geometryIndex ];

				geometry = createSomething( THREE[ params.type ], params.args );

				// Scale Geometry

				if ( params.scale ) {

					geometry.scale( params.scale, params.scale, params.scale );

				}

				smooth = modifier.modify( geometry );

				var faceIndices = [ 'a', 'b', 'c' ];

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

					var face = smooth.faces[ i ];

					for ( var j = 0; j < 3; j ++ ) {

						var vertexIndex = face[ faceIndices[ j ] ];
						var vertex = smooth.vertices[ vertexIndex ];

						var hue = ( vertex.y / 200 ) + 0.5;
						var color = new THREE.Color().setHSL( hue, 1, 0.5 );

						face.vertexColors[ j ] = color;

					}

				}

				updateInfo();

				group = new THREE.Group();
				scene.add( group );

				mesh = new THREE.Mesh( new THREE.BufferGeometry().fromGeometry( geometry ), material );
				group.add( mesh );

				var smoothBufferGeometry = new THREE.BufferGeometry().fromGeometry( smooth );

				cube = new THREE.Mesh( smoothBufferGeometry, smoothMaterial );
				var wireframe = new THREE.Mesh( smoothBufferGeometry, wireframeMaterial );
				cube.add( wireframe );

				cube.scale.setScalar( params.meshScale ? params.meshScale : 1 );
				scene.add( cube );

				group.scale.copy( cube.scale );

			}

			function init() {

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

				info = document.createElement( 'div' );
				info.style.position = 'absolute';
				info.style.top = '10px';
				info.style.width = '100%';
				info.style.textAlign = 'center';
				info.innerHTML = 'Drag to spin the geometry ';
				container.appendChild( info );

				camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 1000 );
				camera.position.z = 500;

				scene = new THREE.Scene();
				scene.background = new THREE.Color( 0xf0f0f0 );

				var light = new THREE.PointLight( 0xffffff, 1.5 );
				light.position.set( 1000, 1000, 2000 );
				scene.add( light );

				addStuff();

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

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

				//

				var controls = new THREE.OrbitControls( camera, renderer.domElement );

				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 );

				stats.begin();
				render();
				stats.end();

			}

			function render() {

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>