samien
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three.js
mirror da https://github.com/mrdoob/three.js.git


			
				
					
						
						
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							<!doctype html>
<html lang="en">
	<head>
		<title>three.js canvas - geometry - cube</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 {
				font-family: Monospace;
				background-color: #f0f0f0;
				margin: 0px;
				overflow: hidden;
			}
		</style>
	</head>
	<body>

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

		<script src="js/RequestAnimationFrame.js"></script>
		<script src="js/Stats.js"></script>
		
		<script src="../src/core/Geometry.js"></script>
		<script src="../src/extras/geometries/CubeGeometry.js"></script>

		<script>

			var container, stats;

			var camera, scene, renderer;

			var cube, plane;

			var targetRotation = 0;
			var targetRotationOnMouseDown = 0;

			var mouseX = 0;
			var mouseXOnMouseDown = 0;

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

		
		
			/*
			 * @author zz85 / https://github.com/zz85
			 * Smooth Geometry (SmoothMesh) using Catmull-Clark Subdivision Surfaces
			 * Readings: 
			 *	http://en.wikipedia.org/wiki/Catmull%E2%80%93Clark_subdivision_surface
			 *	http://www.rorydriscoll.com/2008/08/01/catmull-clark-subdivision-the-basics/
			 */
			// 
			THREE.SubdivisionGeometry = function( oldGeometry ) {
				THREE.Geometry.call( this );

				var scope = this;
				
				function v( x, y, z ) {
					scope.vertices.push( new THREE.Vertex( new THREE.Vector3( x, y, z ) ) );
				}

				function f4( a, b, c, d ) {
					scope.faces.push( new THREE.Face4( a, b, c, d ) );
				}
				
				function edge_hash( a, b ) {

					return Math.min( a, b ) + "_" + Math.max( a, b );

				};
				
				var originalPoints = oldGeometry.vertices;
				var originalFaces = oldGeometry.faces;
				
				var newPoints = originalPoints.concat(); // Vertices
					
				var facePoints = [], edgePoints = {};
				
				// Step 1
				//	For each face, add a face point
				//	Set each face point to be the centroid of all original points for the respective face.
				
				var i, il, face;
				
				for (i=0, il = originalFaces.length; i<il ;i++) {
					face = originalFaces[i];
					facePoints.push(face.centroid);
					newPoints.push( new THREE.Vertex(face.centroid) );
				}
			
				// Step 2
				//	For each edge, add an edge point.
				//	Set each edge point to be the average of the two neighbouring face points and its two original endpoints.
				oldGeometry.computeEdgeFaces();
				var edges = oldGeometry.edges, edge, faceIndexA, faceIndexB, avg;
				console.log('edges', edges.length);
				
				
				var vfMap = oldGeometry.vfMap;
				console.log('vfMap', vfMap);
				
				var edgeInfo;
				var edgeCount = 0;
				var originalVerticesLength = originalPoints.length;
				var edgeVertex, edgeVertexA, edgeVertexB;
				for (i in vfMap) {
					edgeInfo = vfMap[i];
					edge = edgeInfo.array;
					faceIndexA = edge[0]; // face index a
					faceIndexB = edge[1]; // face index b
					
					avg = new THREE.Vector3();
					
					avg.addSelf(facePoints[faceIndexA]);
					avg.addSelf(facePoints[faceIndexB]);
					
					
					edgeVertex = i.split('_');
					edgeVertexA = edgeVertex[0];
					edgeVertexB = edgeVertex[1];
					
					avg.addSelf(originalPoints[edgeVertexA].position);
					avg.addSelf(originalPoints[edgeVertexB].position);
					
					
					
					avg.multiplyScalar(0.25);
					
					edgePoints[i] = originalVerticesLength + originalFaces.length + edgeCount;
					
					newPoints.push( new THREE.Vertex(avg) );
				
					console.log(edge, i);
					edgeCount ++;
					
					
					
				}
				
				// Step 3
				//	For each face point, add an edge for every edge of the face, 
				//	connecting the face point to each edge point for the face.
				
				
				var facePt, currentVerticeIndex;
				
				var hashAB, hashBC, hashCD, hashDA, hashCA;
				
				
				for (i=0, il = facePoints.length; i<il ;i++) { // for every face
					facePt = facePoints[i];
					face = originalFaces[i];
					currentVerticeIndex = originalVerticesLength+ i;
					
					console.log('face', face, facePt);
					if ( face instanceof THREE.Face3 ) {
						
						// create 3 face4s
						
						hashAB = edge_hash( face.a, face.b );
						hashBC = edge_hash( face.b, face.c );
						hashCA = edge_hash( face.c, face.a );

						
						f4( currentVerticeIndex, edgePoints[hashAB], face.b, edgePoints[hashBC]);
						f4( currentVerticeIndex, edgePoints[hashBC], face.c, edgePoints[hashCA]);
						f4( currentVerticeIndex, edgePoints[hashCA], face.a, edgePoints[hashAB]);
						
					} else if ( face instanceof THREE.Face4 ) {
						// create 4 face4s
						
						hashAB = edge_hash( face.a, face.b );
						hashBC = edge_hash( face.b, face.c );
						hashCD = edge_hash( face.c, face.d );
						hashDA = edge_hash( face.d, face.a );
						
						// f4( currentVerticeIndex, edgePoints[hashAB], face.b, edgePoints[hashBC]);
						// f4( currentVerticeIndex, edgePoints[hashBC], face.c, edgePoints[hashCD]);
						// f4( currentVerticeIndex, edgePoints[hashCD], face.d, edgePoints[hashDA]);
						// f4( currentVerticeIndex, edgePoints[hashDA], face.a, edgePoints[hashAB]);
					
						f4( face.a, edgePoints[hashAB], currentVerticeIndex, edgePoints[hashDA]);	
						f4( face.b, edgePoints[hashBC], currentVerticeIndex, edgePoints[hashAB]);
						f4( face.c, edgePoints[hashCD], currentVerticeIndex, edgePoints[hashBC]);
						f4( face.d, edgePoints[hashDA], currentVerticeIndex, edgePoints[hashCD]);
	
						
					} else {
						console.log('face should be a face!', face);
					}
				}
				
				
				scope.vertices = newPoints;
				
				console.log('original ', oldGeometry.vertices.length, oldGeometry.faces.length );
				
				console.log('newPoints', newPoints, 'faces', this.faces, newPoints.length, this.faces.length );
				
				// Step 4
				
				//	For each original point P, 
				//		take the average F of all n face points for faces touching P, 
				//		and take the average R of all n edge midpoints for edges touching P, 
				//		where each edge midpoint is the average of its two endpoint vertices. 
				//	Move each original point to the point
				
				
				
				var vertexEdgeMap = {};
				var vertexFaceMap = {};
				
				var addVertexEdgeMap = function(vertex, edge) {
					if (vertexEdgeMap[vertex]===undefined) {
						vertexEdgeMap[vertex] = [];
					}
					
					vertexEdgeMap[vertex].push(edge);
				};
				
				var addVertexFaceMap = function(vertex, face) {
					if (vertexFaceMap[vertex]===undefined) {
						vertexFaceMap[vertex] = {};
					}
					
					vertexFaceMap[vertex][face] = null;
				};
				
				for (i in vfMap) {
					edgeInfo = vfMap[i];
					
					edgeVertex = i.split('_');
					edgeVertexA = edgeVertex[0];
					edgeVertexB = edgeVertex[1];
					
					addVertexEdgeMap(edgeVertexA,edgeInfo );
					addVertexEdgeMap(edgeVertexB,edgeInfo );
					
					edge = edgeInfo.array;
					faceIndexA = edge[0]; // face index a
					faceIndexB = edge[1]; // face index b
					
					addVertexFaceMap(edgeVertexA, faceIndexA);
					addVertexFaceMap(edgeVertexA, faceIndexB);
					addVertexFaceMap(edgeVertexB, faceIndexA);
					addVertexFaceMap(edgeVertexB, faceIndexB);
					
				}
				
 				console.log('vertexEdgeMap',vertexEdgeMap, 'vertexFaceMap', vertexFaceMap);
				
				var F = new THREE.Vector3();
				var R = new THREE.Vector3();
			
				var j, n;
				for (i=0, il = originalPoints.length; i<il; i++) {
					// (F + 2R + (n-3)P) / n
					
					F.set(0,0,0);
					R.set(0,0,0);
					var newPos =  new THREE.Vector3(0,0,0);
					
					var z =0;
					for (j in vertexFaceMap[i]) {
						F.addSelf(facePoints[j]);
					}
					
					F.divideScalar(z);
					
					n = vertexEdgeMap[i].length;
					
					for (j=0; j<n;j++) {
						edge = vertexEdgeMap[i][j].array
						var midPt = originalPoints[edge[0]].position.clone().addSelf(originalPoints[edge[1]].position).divideScalar(2);
						R.addSelf(midPt);
						// R.addSelf(originalPoints[edge[0]].position);
						// R.addSelf(originalPoints[edge[1]].position);
					}
					
					newPos.addSelf(originalPoints[i].position);
					newPos.multiplyScalar(n - 3);
					
					newPos.addSelf(F);
					newPos.addSelf(R.multiplyScalar(2));
					newPos.divideScalar(n);
					
					this.vertices[i].position = newPos;
					
					
				}
				
				console.log('HEY', this);
				
				
				this.computeCentroids();
				this.computeFaceNormals();
			};
			
			THREE.SubdivisionGeometry.prototype = new THREE.Geometry();
			THREE.SubdivisionGeometry.prototype.constructor = THREE.SubdivisionGeometry;

			
			
			// Create subdivision geometry  
			function subdivision(geometry) {
				return new THREE.SubdivisionGeometry(geometry);
			}
			
			init();
			animate();

			function init() {

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

				var 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 cube';
				container.appendChild( info );

				camera = new THREE.Camera( 70, window.innerWidth / window.innerHeight, 1, 1000 );
				camera.position.y = 150;
				camera.position.z = 500;
				camera.target.position.y = 150;

				scene = new THREE.Scene();

				
				
				
				// Cube

				var materials = [];

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

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

				}
				
				geometry = new THREE.CubeGeometry( 200, 200, 200, 1, 1, 1, materials );
				
				smooth = subdivision(geometry);
				//smooth = subdivision(smooth);
				
				var PI2 = Math.PI * 2;
				var program = function ( context ) {

					context.beginPath();
					context.arc( 0, 0, 1, 0, PI2, true );
					context.closePath();
					context.fill();

				}

				group = new THREE.Object3D();
				group.position.y = 150;
				scene.add( group );

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

					particle = new THREE.Particle( new THREE.ParticleCanvasMaterial( { color: Math.random() * 0x808008 + 0x808080, program: program } ) );
					particle.position = smooth.vertices[i].position;
					var pos = smooth.vertices.position
					particle.scale.x = particle.scale.y = 5;
					group.add( particle );
				}
				

				cube = new THREE.Mesh( smooth, new THREE.MeshBasicMaterial( { color: 0x405040, wireframe:true,  opacity:0.8 } ) ); //new THREE.MeshFaceMaterial()
				cube.doubleSided = true;
				cube.position.y = 150;
				cube.overdraw = true;
				scene.add( cube );

				// Plane

				plane = new THREE.Mesh( new THREE.PlaneGeometry( 200, 200 ), new THREE.MeshBasicMaterial( { color: 0xe0e0e0 } ) );
				plane.rotation.x = - 90 * ( Math.PI / 180 );
				plane.overdraw = true;
				scene.add( plane );

				renderer = new THREE.CanvasRenderer();
				renderer.setSize( window.innerWidth, window.innerHeight );

				container.appendChild( renderer.domElement );

				stats = new Stats();
				stats.domElement.style.position = 'absolute';
				stats.domElement.style.top = '0px';
				container.appendChild( stats.domElement );

				document.addEventListener( 'mousedown', onDocumentMouseDown, false );
				document.addEventListener( 'touchstart', onDocumentTouchStart, false );
				document.addEventListener( 'touchmove', onDocumentTouchMove, false );
			}

			//

			function onDocumentMouseDown( event ) {

				event.preventDefault();

				document.addEventListener( 'mousemove', onDocumentMouseMove, false );
				document.addEventListener( 'mouseup', onDocumentMouseUp, false );
				document.addEventListener( 'mouseout', onDocumentMouseOut, false );

				mouseXOnMouseDown = event.clientX - windowHalfX;
				targetRotationOnMouseDown = targetRotation;
			}

			function onDocumentMouseMove( event ) {

				mouseX = event.clientX - windowHalfX;

				targetRotation = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.02;
			}

			function onDocumentMouseUp( event ) {

				document.removeEventListener( 'mousemove', onDocumentMouseMove, false );
				document.removeEventListener( 'mouseup', onDocumentMouseUp, false );
				document.removeEventListener( 'mouseout', onDocumentMouseOut, false );
			}

			function onDocumentMouseOut( event ) {

				document.removeEventListener( 'mousemove', onDocumentMouseMove, false );
				document.removeEventListener( 'mouseup', onDocumentMouseUp, false );
				document.removeEventListener( 'mouseout', onDocumentMouseOut, false );
			}

			function onDocumentTouchStart( event ) {

				if ( event.touches.length == 1 ) {

					event.preventDefault();

					mouseXOnMouseDown = event.touches[ 0 ].pageX - windowHalfX;
					targetRotationOnMouseDown = targetRotation;

				}
			}

			function onDocumentTouchMove( event ) {

				if ( event.touches.length == 1 ) {

					event.preventDefault();

					mouseX = event.touches[ 0 ].pageX - windowHalfX;
					targetRotation = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.05;

				}
			}

			//

			function animate() {

				requestAnimationFrame( animate );

				render();
				stats.update();

			}

			function render() {

				group.rotation.y = plane.rotation.z = cube.rotation.y += ( targetRotation - cube.rotation.y ) * 0.05;
				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>