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index.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<style>
html, body {
padding: 0;
margin: 0;
width: 100%;
height: 100%;
text-align: center;
}
body {
padding-top: 25vh;
}
body.rendering {
padding-top: 0;
}
.msg {
display: none;
}
body.loading .msg {
display: block;
}
form {
display: inline-block;
padding: 1vw 5vw;
border: solid 1px #eee;
border-radius: 1vw;
}
form div {
margin-bottom: 3vw;
}
body.loading form,
body.rendering form {
display: none;
}
canvas {
display: none;
}
body.rendering canvas {
display: block;
}
#status1 {
font-size: 150%;
font-weight: bold;
}
#branding {
position: absolute;
top: 16px;
right: 16px;
text-align: right;
}
input[type='button'] {
padding: 8px 64px;
margin-top: 3vw;
}
</style>
</head>
<body class='loading'>
<div id='branding'>
<img src='http://ifcopenshell.org/static/ifcopenshell_logo.png' height='64' width='auto'>
<img src='https://upload.wikimedia.org/wikipedia/commons/1/1f/WebAssembly_Logo.svg' height='64' width='auto'>
<br>
<b>IfcOpenShell</b> WebAssembly
</div>
<div class='msg'>
<div id='status1'>Loading...</div>
<div id='status2'></div>
</div>
<form action='#' onsubmit="return false;">
<div>Client-side model viewer</div>
<input type='file' id='fileinput'><br>
<input type='button' id='btn' value='Load'>
</form>
<script type="text/javascript">document.querySelector("#status2").innerHTML = "Fetching pyodide";</script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/pyodide/v0.22.0a1/full/pyodide.js"></script>
<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
<script type="importmap">
{"imports": {"three": "https://unpkg.com/three@0.141.0/build/three.module.js",
"OrbitControls": "https://unpkg.com/three@0.141.0/examples/jsm/controls/OrbitControls.js"}}
</script>
<script type="module">
import * as THREE from 'three';
import { OrbitControls } from 'OrbitControls';
THREE.Object3D.DefaultUp = new THREE.Vector3(0,0,1);
let pyodide = null;
async function main() {
document.querySelector("#status2").innerHTML = "Initializing pyodide";
pyodide = await loadPyodide();
document.querySelector("#status2").innerHTML = "Loading package manager";
await pyodide.loadPackage("micropip");
const micropip = pyodide.pyimport("micropip");
document.querySelector("#status2").innerHTML = "Loading IfcOpenShell (this may take a while)";
await micropip.install("IfcOpenShell-0.7.0-py3-none-any.whl");
console.log(await pyodide.runPython(`
import ifcopenshell
ifcopenshell.version`));
document.body.className = ''
document.querySelector("input[type=button]").onclick = async () => {
document.body.className = 'loading'
document.querySelector("#status2").innerHTML = "Generating geometry";
let file = document.querySelector("input").files[0];
let content = await file.text();
let ifcopenshell = pyodide.pyimport('ifcopenshell')
let ifc = ifcopenshell.file.from_string(content);
let ifcopenshell_geom = pyodide.pyimport('ifcopenshell.geom');
let s = ifcopenshell_geom.settings();
s.set(s.WELD_VERTICES, false);
/*
let it = ifcopenshell_geom.iterator.callKwargs({
'settings': s,
'file_or_filename': ifc,
'num_threads': 8});
'exclude':['IfcSpace', 'IfcOpeningElement']});
*/
let it = ifcopenshell_geom.iterator(s, ifc);
let last_mesh_id = null;
let geometries;
const renderer = new THREE.WebGLRenderer();
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );
renderer.setClearColor(0x000000, 0);
const scene = new THREE.Scene();
var light = new THREE.DirectionalLight(0xFFFFFF);
light.position.set(20, 10, 30);
scene.add(light);
var light = new THREE.DirectionalLight(0xFFFFFF, 0.8);
light.position.set(-10, 1, -30);
scene.add(light);
scene.add(new THREE.AmbientLight(0x404050));
const camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 10000 );
const controls = new OrbitControls( camera, renderer.domElement );
if (it.initialize()) {
while (true) {
let obj = it.get();
// obj.type appears to be overwritten by pyodide, returning the typename of the C++ class?
let ty = ifc.by_id(obj.id).is_a()
if (ty !== 'IfcOpeningElement' && ty !== 'IfcSpace') {
if (last_mesh_id != obj.geometry.id) {
geometries = [];
let materials = obj.geometry.materials.toJs().map(e => new THREE.MeshLambertMaterial({
color: new THREE.Color(...e.diffuse.toJs()),
opacity: 1.0 - e.transparency,
transparent: e.transparency > 1.e-5,
side: THREE.DoubleSide
}));
let mapping = {};
obj.geometry.material_ids.toJs().forEach((i, idx) => {
mapping[i] = mapping[i] || []
mapping[i].push(idx);
});
let vs = new Float32Array(obj.geometry.verts.toJs());
let ns = new Float32Array(obj.geometry.normals.toJs());
let fs = obj.geometry.faces.toJs();
// Default material
let offset = 0;
if (mapping[-1]) {
materials.unshift(new THREE.MeshLambertMaterial({
color: new THREE.Color(0.6,0.6,0.6),
side: THREE.DoubleSide
}));
offset = 1;
}
materials.forEach((m, mi) => {
let geometry = new THREE.BufferGeometry();
geometry.setIndex(mapping[mi - offset].flatMap(i => [fs[3*i+0], fs[3*i+1], fs[3*i+2]]));
geometry.setAttribute('position', new THREE.Float32BufferAttribute(vs, 3));
geometry.setAttribute('normal', new THREE.Float32BufferAttribute(ns, 3));
geometries.push([geometry, m]);
});
last_mesh_id = obj.geometry.id;
}
for (let gm of geometries) {
let [g, mat] = gm;
let mesh = new THREE.Mesh(g, mat);
var matrix = new THREE.Matrix4();
const m = obj.transformation.matrix.data.toJs();
matrix.set(m[0], m[1], m[2], 0, m[3], m[4], m[5], 0, m[6], m[7], m[8], 0, m[9], m[10], m[11], 1);
matrix.transpose();
mesh.matrixAutoUpdate = false;
mesh.matrix = matrix;
scene.add(mesh);
}
}
if (!it.next()) {
break;
}
}
}
document.body.className = 'rendering';
var boundingBox = new THREE.Box3();
boundingBox.setFromObject(scene);
var center = new THREE.Vector3();
boundingBox.getCenter(center);
controls.target = center;
var viewDistance = boundingBox.getSize(new THREE.Vector3()).length();
camera.position.copy(center.clone().add(
new THREE.Vector3(0.5, 0.25, 1).normalize().multiplyScalar(viewDistance)
));
camera.near = viewDistance / 100;
camera.far = viewDistance * 100;
controls.update();
camera.updateProjectionMatrix();
camera.updateMatrixWorld();
var fovFactor = Math.tan(camera.fov / 2 / 180 * 3.141592653);
var outside = 0.;
var largestAngle = 0.;
for (var i = 0; i < 8; i++) {
const v = new THREE.Vector3(
i & 1 ? boundingBox.min.x : boundingBox.max.x,
i & 2 ? boundingBox.min.y : boundingBox.max.y,
i & 4 ? boundingBox.min.z : boundingBox.max.z
);
v.applyMatrix4(camera.matrixWorldInverse);
outside = Math.max(outside, Math.abs(v.x / camera.aspect) - fovFactor * -v.z, Math.abs(v.y) - fovFactor * -v.z);
}
viewDistance += outside * 2;
camera.position.copy(center.clone().add(
new THREE.Vector3(0.5, 0.25, 1).normalize().multiplyScalar(viewDistance)
));
controls.update();
function render() {
requestAnimationFrame(render);
renderer.render(scene, camera);
}
render();
}
}
main();
</script>
</body>
</html>