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| 1 | +<!DOCTYPE html> |
| 2 | +<html lang="en"> |
| 3 | + <head> |
| 4 | + <!-- as prototype used: https://github.com/mrdoob/three.js/blob/master/examples/webgl_geometries.html --> |
| 5 | + <title>Build and draw TGeo object using external three.js</title> |
| 6 | + <meta charset="utf-8"> |
| 7 | + <link rel="shortcut icon" href="../img/RootIcon.ico"/> |
| 8 | + <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0"> |
| 9 | + <style> |
| 10 | + body { |
| 11 | + font-family: Monospace; |
| 12 | + background-color: #000; |
| 13 | + margin: 0px; |
| 14 | + overflow: hidden; |
| 15 | + } |
| 16 | + </style> |
| 17 | + <script type="importmap"> |
| 18 | + { |
| 19 | + "imports": { |
| 20 | + "three": "https://threejs.org/build/three.module.js", |
| 21 | + "three/addons": "https://threejs.org/examples/jsm/Addons.js", |
| 22 | + "three_stats": "https://threejs.org/examples/jsm/libs/stats.module.js", |
| 23 | + "jsroot_geom": "../build/geom_nothreejs.mjs" |
| 24 | + } |
| 25 | + } |
| 26 | + </script> |
| 27 | + |
| 28 | + </head> |
| 29 | + |
| 30 | + <body> |
| 31 | + </body> |
| 32 | + |
| 33 | + <script type='module'> |
| 34 | + |
| 35 | + import { Box3, Vector3, PerspectiveCamera, Scene, AmbientLight, DirectionalLight, DoubleSide, |
| 36 | + MeshLambertMaterial, Mesh, TetrahedronGeometry, WebGLRenderer } from 'three'; |
| 37 | + |
| 38 | + import Stats from 'three_stats'; |
| 39 | + |
| 40 | + import { openFile, build, produceRenderOrder } from 'jsroot_geom'; |
| 41 | + |
| 42 | + |
| 43 | + let container, stats, camera, scene, renderer, geom_size = 400, dummy = null; |
| 44 | + |
| 45 | + function add_geometry(obj) { |
| 46 | + |
| 47 | + // options for building three.js model |
| 48 | + let opt = { numfaces: 100000, numnodes: 1000 }; |
| 49 | + |
| 50 | + // increase number of faces |
| 51 | + // opt.numfaces *= 100; |
| 52 | + // opt.numnodes *= 100; |
| 53 | + |
| 54 | + // use default colors |
| 55 | + // opt.dflt_colors = true; |
| 56 | + |
| 57 | + // enable usage of InstancedMesh |
| 58 | + opt.instancing = 1; |
| 59 | + |
| 60 | + // function demonstrate creation of three.js model |
| 61 | + let obj3d = build(obj, opt); |
| 62 | + |
| 63 | + if (!obj3d) return; |
| 64 | + scene.remove( dummy ); |
| 65 | + scene.add( obj3d ); |
| 66 | + |
| 67 | + let box3 = new Box3().setFromObject(obj3d); |
| 68 | + |
| 69 | + geom_size = box3.getSize(new Vector3()).length(); |
| 70 | + |
| 71 | + camera.far = geom_size*5; |
| 72 | + camera.updateProjectionMatrix(); |
| 73 | + } |
| 74 | + |
| 75 | + function onWindowResize() { |
| 76 | + |
| 77 | + camera.aspect = window.innerWidth / window.innerHeight; |
| 78 | + camera.updateProjectionMatrix(); |
| 79 | + |
| 80 | + renderer.setSize( window.innerWidth, window.innerHeight ); |
| 81 | + } |
| 82 | + |
| 83 | + function animate() { |
| 84 | + |
| 85 | + requestAnimationFrame( animate ); |
| 86 | + |
| 87 | + render(); |
| 88 | + stats.update(); |
| 89 | + |
| 90 | + } |
| 91 | + |
| 92 | + function render() { |
| 93 | + |
| 94 | + let timer = Date.now() * 0.0001; |
| 95 | + |
| 96 | + camera.position.x = Math.cos(timer)*geom_size; |
| 97 | + camera.position.z = Math.sin(timer)*geom_size; |
| 98 | + camera.position.y = geom_size; |
| 99 | + |
| 100 | + camera.lookAt( scene.position ); |
| 101 | + |
| 102 | + for (let i = 0, l = scene.children.length; i < l; i++) { |
| 103 | + |
| 104 | + let object = scene.children[ i ]; |
| 105 | + |
| 106 | + object.rotation.x = timer * 5; |
| 107 | + object.rotation.y = timer * 2.5; |
| 108 | + |
| 109 | + } |
| 110 | + |
| 111 | + // set rendering order for transparent volumes, create with JSROOT |
| 112 | + produceRenderOrder(scene, camera.position, 'dflt'); |
| 113 | + |
| 114 | + renderer.render( scene, camera ); |
| 115 | + } |
| 116 | + |
| 117 | + container = document.createElement('div'); |
| 118 | + document.body.appendChild(container); |
| 119 | + |
| 120 | + camera = new PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, geom_size*5 ); |
| 121 | + camera.position.y = geom_size; |
| 122 | + |
| 123 | + scene = new Scene(); |
| 124 | + scene.add(new AmbientLight(0x404040)); |
| 125 | + |
| 126 | + let light = new DirectionalLight( 0xffffff ); |
| 127 | + light.position.set(0, 1, 0); |
| 128 | + scene.add( light ); |
| 129 | + |
| 130 | + // first draw dummy object, seen in the beginning |
| 131 | + let material = new MeshLambertMaterial({side: DoubleSide, color: 'red', vertexColors: false}); |
| 132 | + dummy = new Mesh(new TetrahedronGeometry(75, 0), material); |
| 133 | + // object.position.set( 200, 0, 200 ); |
| 134 | + scene.add( dummy ); |
| 135 | + |
| 136 | + renderer = new WebGLRenderer({ antialias: true }); |
| 137 | + renderer.setPixelRatio( window.devicePixelRatio ); |
| 138 | + renderer.setSize( window.innerWidth, window.innerHeight ); |
| 139 | + |
| 140 | + container.appendChild( renderer.domElement ); |
| 141 | + |
| 142 | + stats = new Stats(); |
| 143 | + container.appendChild( stats.dom ); |
| 144 | + |
| 145 | + window.addEventListener( 'resize', onWindowResize, false ); |
| 146 | + |
| 147 | + |
| 148 | + const file = await openFile('https://root.cern/files/lego.root'); |
| 149 | + |
| 150 | + const obj = await file.readObject('geom'); |
| 151 | + |
| 152 | + add_geometry(obj); |
| 153 | + |
| 154 | + animate(); |
| 155 | + |
| 156 | + </script> |
| 157 | + |
| 158 | +</html> |
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