mirror of
https://github.com/Doodle3D/Doodle3D-Slicer.git
synced 2024-11-16 11:07:57 +01:00
361 lines
8.6 KiB
HTML
361 lines
8.6 KiB
HTML
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<!doctype html>
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<html lang="en">
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<head>
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<title>three.js webgl - interactive - raycasting - pointcloud</title>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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<style>
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body {
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color: #ffffff;
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background-color: #000000;
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margin: 0px;
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overflow: hidden;
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}
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#info {
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position: absolute;
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top: 0px;
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width: 100%;
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padding: 5px;
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font-family: Monospace;
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font-size: 13px;
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text-align: center;
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font-weight: bold;
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}
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a {
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color: #fff;
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}
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</style>
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</head>
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<body>
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<div id="container"></div>
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<div id="info"><a href="http://threejs.org" target="_blank">three.js</a> webgl - interactive - raycasting - pointcloud </div>
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<script src="../build/three.min.js"></script>
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<script src="js/Detector.js"></script>
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<script src="js/libs/stats.min.js"></script>
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<script>
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if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
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var renderer, scene, camera, stats;
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var pointclouds;
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var raycaster, intersects;
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var mouse = new THREE.Vector2();
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var intersection = null;
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var spheres = [];
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var spheresIndex = 0;
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var clock;
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var threshold = 0.1;
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var pointSize = 0.05;
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var width = 150;
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var length = 150;
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var rotateY = new THREE.Matrix4().makeRotationY( 0.005 );
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init();
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animate();
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function generatePointCloudGeometry( color, width, length ){
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var geometry = new THREE.BufferGeometry();
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var numPoints = width*length;
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var positions = new Float32Array( numPoints*3 );
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var colors = new Float32Array( numPoints*3 );
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var k = 0;
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for( var i = 0; i < width; i++ ) {
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for( var j = 0; j < length; j++ ) {
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var u = i / width;
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var v = j / length;
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var x = u - 0.5;
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var y = ( Math.cos( u * Math.PI * 8 ) + Math.sin( v * Math.PI * 8 ) ) / 20;
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var z = v - 0.5;
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positions[ 3 * k ] = x;
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positions[ 3 * k + 1 ] = y;
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positions[ 3 * k + 2 ] = z;
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var intensity = ( y + 0.1 ) * 5;
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colors[ 3 * k ] = color.r * intensity;
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colors[ 3 * k + 1 ] = color.g * intensity;
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colors[ 3 * k + 2 ] = color.b * intensity;
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k++;
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}
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}
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geometry.addAttribute( 'position', new THREE.BufferAttribute( positions, 3 ) );
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geometry.addAttribute( 'color', new THREE.BufferAttribute( colors, 3 ) );
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geometry.computeBoundingBox();
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return geometry;
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}
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function generatePointcloud( color, width, length ) {
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var geometry = generatePointCloudGeometry( color, width, length );
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var material = new THREE.PointCloudMaterial( { size: pointSize, vertexColors: THREE.VertexColors } );
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var pointcloud = new THREE.PointCloud( geometry, material );
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return pointcloud;
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}
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function generateIndexedPointcloud( color, width, length ) {
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var geometry = generatePointCloudGeometry( color, width, length );
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var numPoints = width * length;
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var indices = new Uint16Array( numPoints );
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var k = 0;
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for( var i = 0; i < width; i++ ) {
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for( var j = 0; j < length; j++ ) {
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indices[ k ] = k;
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k++;
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}
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}
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geometry.addAttribute( 'index', new THREE.BufferAttribute( indices, 1 ) );
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var material = new THREE.PointCloudMaterial( { size: pointSize, vertexColors: THREE.VertexColors } );
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var pointcloud = new THREE.PointCloud( geometry, material );
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return pointcloud;
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}
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function generateIndexedWithOffsetPointcloud( color, width, length ){
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var geometry = generatePointCloudGeometry( color, width, length );
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var numPoints = width * length;
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var indices = new Uint16Array( numPoints );
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var k = 0;
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for( var i = 0; i < width; i++ ){
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for( var j = 0; j < length; j++ ) {
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indices[ k ] = k;
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k++;
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}
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}
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geometry.addAttribute( 'index', new THREE.BufferAttribute( indices, 1 ) );
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var offset = { start: 0, count: indices.length, index: 0 };
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geometry.offsets.push( offset );
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var material = new THREE.PointCloudMaterial( { size: pointSize, vertexColors: THREE.VertexColors } );
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var pointcloud = new THREE.PointCloud( geometry, material );
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return pointcloud;
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}
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function generateRegularPointcloud( color, width, length ) {
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var geometry = new THREE.Geometry();
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var numPoints = width * length;
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var colors = [];
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var k = 0;
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for( var i = 0; i < width; i++ ) {
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for( var j = 0; j < length; j++ ) {
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var u = i / width;
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var v = j / length;
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var x = u - 0.5;
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var y = ( Math.cos( u * Math.PI * 8 ) + Math.sin( v * Math.PI * 8) ) / 20;
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var z = v - 0.5;
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var v = new THREE.Vector3( x,y,z );
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var intensity = ( y + 0.1 ) * 7;
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colors[ 3 * k ] = color.r * intensity;
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colors[ 3 * k + 1 ] = color.g * intensity;
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colors[ 3 * k + 2 ] = color.b * intensity;
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geometry.vertices.push( v );
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colors[ k ] = ( color.clone().multiplyScalar( intensity ) );
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k++;
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}
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}
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geometry.colors = colors;
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geometry.computeBoundingBox();
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var material = new THREE.PointCloudMaterial( { size: pointSize, vertexColors: THREE.VertexColors } );
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var pointcloud = new THREE.PointCloud( geometry, material );
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return pointcloud;
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}
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function init() {
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container = document.getElementById( 'container' );
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scene = new THREE.Scene();
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clock = new THREE.Clock();
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camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 10000 );
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camera.applyMatrix( new THREE.Matrix4().makeTranslation( 0,0,20 ) );
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camera.applyMatrix( new THREE.Matrix4().makeRotationX( -0.5 ) );
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//
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pcBuffer = generatePointcloud( new THREE.Color( 1,0,0 ), width, length );
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pcBuffer.scale.set( 10,10,10 );
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pcBuffer.position.set( -5,0,5 );
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scene.add( pcBuffer );
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var pcIndexed = generateIndexedPointcloud( new THREE.Color( 0,1,0 ), width, length );
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pcIndexed.scale.set( 10,10,10 );
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pcIndexed.position.set( 5,0,5 );
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scene.add( pcIndexed );
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var pcIndexedOffset = generateIndexedWithOffsetPointcloud( new THREE.Color( 0,1,1 ), width, length );
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pcIndexedOffset.scale.set( 10,10,10 );
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pcIndexedOffset.position.set( 5,0,-5 );
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scene.add( pcIndexedOffset );
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var pcRegular = generateRegularPointcloud( new THREE.Color( 1,0,1 ), width, length );
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pcRegular.scale.set( 10,10,10 );
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pcRegular.position.set( -5,0,-5 );
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scene.add( pcRegular );
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pointclouds = [ pcBuffer, pcIndexed, pcIndexedOffset, pcRegular ];
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//
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var sphereGeometry = new THREE.SphereGeometry( 0.1, 32, 32 );
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var sphereMaterial = new THREE.MeshBasicMaterial( { color: 0xff0000, shading: THREE.FlatShading } );
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for ( var i = 0; i < 40; i++ ) {
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var sphere = new THREE.Mesh( sphereGeometry, sphereMaterial );
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scene.add( sphere );
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spheres.push( sphere );
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}
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//
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renderer = new THREE.WebGLRenderer();
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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container.appendChild( renderer.domElement );
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//
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raycaster = new THREE.Raycaster();
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raycaster.params.PointCloud.threshold = threshold;
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//
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stats = new Stats();
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stats.domElement.style.position = 'absolute';
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stats.domElement.style.top = '0px';
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container.appendChild( stats.domElement );
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//
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window.addEventListener( 'resize', onWindowResize, false );
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document.addEventListener( 'mousemove', onDocumentMouseMove, false );
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}
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function onDocumentMouseMove( event ) {
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event.preventDefault();
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mouse.x = ( event.clientX / window.innerWidth ) * 2 - 1;
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mouse.y = - ( event.clientY / window.innerHeight ) * 2 + 1;
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}
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function onWindowResize() {
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camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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renderer.setSize( window.innerWidth, window.innerHeight );
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}
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function animate() {
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requestAnimationFrame( animate );
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render();
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stats.update();
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}
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var toggle = 0;
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function render() {
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camera.applyMatrix( rotateY );
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camera.updateMatrixWorld();
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raycaster.setFromCamera( mouse, camera );
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var intersections = raycaster.intersectObjects( pointclouds );
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intersection = ( intersections.length ) > 0 ? intersections[ 0 ] : null;
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if ( toggle > 0.02 && intersection !== null) {
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spheres[ spheresIndex ].position.copy( intersection.point );
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spheres[ spheresIndex ].scale.set( 1, 1, 1 );
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spheresIndex = ( spheresIndex + 1 ) % spheres.length;
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toggle = 0;
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}
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for ( var i = 0; i < spheres.length; i++ ) {
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var sphere = spheres[ i ];
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sphere.scale.multiplyScalar( 0.98 );
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sphere.scale.clampScalar( 0.01, 1 );
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}
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toggle += clock.getDelta();
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renderer.render( scene, camera );
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}
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</script>
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</body>
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</html>
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