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391 lines
9.6 KiB
391 lines
9.6 KiB
2 years ago
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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 - LDrawLoader</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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<link type="text/css" rel="stylesheet" href="main.css">
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<style>
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body {
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color: #444;
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}
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a {
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color: #08f;
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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="info">
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - LDrawLoader
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</div>
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<!-- Import maps polyfill -->
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<!-- Remove this when import maps will be widely supported -->
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<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
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<script type="importmap">
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{
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"imports": {
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"three": "../build/three.module.js",
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"three/addons/": "./jsm/"
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}
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}
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</script>
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<script type="module">
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import * as THREE from 'three';
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import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
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import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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import { RoomEnvironment } from 'three/addons/environments/RoomEnvironment.js';
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import { LDrawLoader } from 'three/addons/loaders/LDrawLoader.js';
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import { LDrawUtils } from 'three/addons/utils/LDrawUtils.js';
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let container, progressBarDiv;
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let camera, scene, renderer, controls, gui, guiData;
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let model;
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const ldrawPath = 'models/ldraw/officialLibrary/';
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const modelFileList = {
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'Car': 'models/car.ldr_Packed.mpd',
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'Lunar Vehicle': 'models/1621-1-LunarMPVVehicle.mpd_Packed.mpd',
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'Radar Truck': 'models/889-1-RadarTruck.mpd_Packed.mpd',
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'Trailer': 'models/4838-1-MiniVehicles.mpd_Packed.mpd',
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'Bulldozer': 'models/4915-1-MiniConstruction.mpd_Packed.mpd',
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'Helicopter': 'models/4918-1-MiniFlyers.mpd_Packed.mpd',
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'Plane': 'models/5935-1-IslandHopper.mpd_Packed.mpd',
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'Lighthouse': 'models/30023-1-Lighthouse.ldr_Packed.mpd',
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'X-Wing mini': 'models/30051-1-X-wingFighter-Mini.mpd_Packed.mpd',
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'AT-ST mini': 'models/30054-1-AT-ST-Mini.mpd_Packed.mpd',
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'AT-AT mini': 'models/4489-1-AT-AT-Mini.mpd_Packed.mpd',
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'Shuttle': 'models/4494-1-Imperial Shuttle-Mini.mpd_Packed.mpd',
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'TIE Interceptor': 'models/6965-1-TIEIntercep_4h4MXk5.mpd_Packed.mpd',
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'Star fighter': 'models/6966-1-JediStarfighter-Mini.mpd_Packed.mpd',
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'X-Wing': 'models/7140-1-X-wingFighter.mpd_Packed.mpd',
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'AT-ST': 'models/10174-1-ImperialAT-ST-UCS.mpd_Packed.mpd'
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};
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init();
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animate();
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function init() {
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container = document.createElement( 'div' );
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document.body.appendChild( container );
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camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 10000 );
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camera.position.set( 150, 200, 250 );
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//
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renderer = new THREE.WebGLRenderer( { antialias: true } );
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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renderer.outputEncoding = THREE.sRGBEncoding;
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renderer.toneMapping = THREE.ACESFilmicToneMapping;
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container.appendChild( renderer.domElement );
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// scene
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const pmremGenerator = new THREE.PMREMGenerator( renderer );
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scene = new THREE.Scene();
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scene.background = new THREE.Color( 0xdeebed );
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scene.environment = pmremGenerator.fromScene( new RoomEnvironment() ).texture;
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controls = new OrbitControls( camera, renderer.domElement );
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//
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guiData = {
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modelFileName: modelFileList[ 'Car' ],
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displayLines: true,
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conditionalLines: true,
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smoothNormals: true,
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buildingStep: 0,
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noBuildingSteps: 'No steps.',
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flatColors: false,
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mergeModel: false
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};
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window.addEventListener( 'resize', onWindowResize );
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progressBarDiv = document.createElement( 'div' );
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progressBarDiv.innerText = 'Loading...';
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progressBarDiv.style.fontSize = '3em';
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progressBarDiv.style.color = '#888';
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progressBarDiv.style.display = 'block';
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progressBarDiv.style.position = 'absolute';
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progressBarDiv.style.top = '50%';
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progressBarDiv.style.width = '100%';
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progressBarDiv.style.textAlign = 'center';
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// load materials and then the model
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reloadObject( true );
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}
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function updateObjectsVisibility() {
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model.traverse( c => {
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if ( c.isLineSegments ) {
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if ( c.isConditionalLine ) {
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c.visible = guiData.conditionalLines;
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} else {
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c.visible = guiData.displayLines;
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}
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} else if ( c.isGroup ) {
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// Hide objects with building step > gui setting
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c.visible = c.userData.buildingStep <= guiData.buildingStep;
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}
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} );
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}
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function reloadObject( resetCamera ) {
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if ( model ) {
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scene.remove( model );
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}
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model = null;
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updateProgressBar( 0 );
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showProgressBar();
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// only smooth when not rendering with flat colors to improve processing time
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const lDrawLoader = new LDrawLoader();
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lDrawLoader.smoothNormals = guiData.smoothNormals && ! guiData.flatColors;
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lDrawLoader
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.setPath( ldrawPath )
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.load( guiData.modelFileName, function ( group2 ) {
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if ( model ) {
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scene.remove( model );
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}
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model = group2;
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// demonstrate how to use convert to flat colors to better mimic the lego instructions look
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if ( guiData.flatColors ) {
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function convertMaterial( material ) {
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const newMaterial = new THREE.MeshBasicMaterial();
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newMaterial.color.copy( material.color );
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newMaterial.polygonOffset = material.polygonOffset;
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newMaterial.polygonOffsetUnits = material.polygonOffsetUnits;
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newMaterial.polygonOffsetFactor = material.polygonOffsetFactor;
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newMaterial.opacity = material.opacity;
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newMaterial.transparent = material.transparent;
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newMaterial.depthWrite = material.depthWrite;
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newMaterial.toneMapping = false;
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return newMaterial;
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}
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model.traverse( c => {
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if ( c.isMesh ) {
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if ( Array.isArray( c.material ) ) {
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c.material = c.material.map( convertMaterial );
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} else {
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c.material = convertMaterial( c.material );
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}
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}
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} );
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}
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// Merge model geometries by material
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if ( guiData.mergeModel ) model = LDrawUtils.mergeObject( model );
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// Convert from LDraw coordinates: rotate 180 degrees around OX
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model.rotation.x = Math.PI;
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scene.add( model );
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guiData.buildingStep = model.userData.numBuildingSteps - 1;
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updateObjectsVisibility();
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// Adjust camera and light
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const bbox = new THREE.Box3().setFromObject( model );
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const size = bbox.getSize( new THREE.Vector3() );
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const radius = Math.max( size.x, Math.max( size.y, size.z ) ) * 0.5;
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if ( resetCamera ) {
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controls.target0.copy( bbox.getCenter( new THREE.Vector3() ) );
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controls.position0.set( - 2.3, 1, 2 ).multiplyScalar( radius ).add( controls.target0 );
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controls.reset();
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}
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createGUI();
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hideProgressBar();
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}, onProgress, onError );
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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 createGUI() {
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if ( gui ) {
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gui.destroy();
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}
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gui = new GUI();
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gui.add( guiData, 'modelFileName', modelFileList ).name( 'Model' ).onFinishChange( function () {
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reloadObject( true );
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} );
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gui.add( guiData, 'flatColors' ).name( 'Flat Colors' ).onChange( function () {
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reloadObject( false );
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} );
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gui.add( guiData, 'mergeModel' ).name( 'Merge model' ).onChange( function () {
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reloadObject( false );
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} );
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if ( model.userData.numBuildingSteps > 1 ) {
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gui.add( guiData, 'buildingStep', 0, model.userData.numBuildingSteps - 1 ).step( 1 ).name( 'Building step' ).onChange( updateObjectsVisibility );
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} else {
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gui.add( guiData, 'noBuildingSteps' ).name( 'Building step' ).onChange( updateObjectsVisibility );
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}
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gui.add( guiData, 'smoothNormals' ).name( 'Smooth Normals' ).onChange( function changeNormals() {
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reloadObject( false );
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} );
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gui.add( guiData, 'displayLines' ).name( 'Display Lines' ).onChange( updateObjectsVisibility );
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gui.add( guiData, 'conditionalLines' ).name( 'Conditional Lines' ).onChange( updateObjectsVisibility );
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}
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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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}
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function render() {
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renderer.render( scene, camera );
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}
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function onProgress( xhr ) {
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if ( xhr.lengthComputable ) {
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updateProgressBar( xhr.loaded / xhr.total );
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console.log( Math.round( xhr.loaded / xhr.total * 100, 2 ) + '% downloaded' );
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}
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}
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function onError( error ) {
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const message = 'Error loading model';
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progressBarDiv.innerText = message;
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console.log( message );
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console.error( error );
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}
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function showProgressBar() {
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document.body.appendChild( progressBarDiv );
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}
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function hideProgressBar() {
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document.body.removeChild( progressBarDiv );
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}
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function updateProgressBar( fraction ) {
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progressBarDiv.innerText = 'Loading... ' + Math.round( fraction * 100, 2 ) + '%';
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}
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</script>
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<!-- LDraw.org CC BY 2.0 Parts Library attribution -->
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<div style="display: block; position: absolute; bottom: 8px; left: 8px; width: 160px; padding: 10px; background-color: #F3F7F8;">
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<center>
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<a href="http://www.ldraw.org"><img style="width: 145px" src="models/ldraw/ldraw_org_logo/Stamp145.png"></a>
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<br />
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<a href="http://www.ldraw.org/">This software uses the LDraw Parts Library</a>
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</center>
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</div>
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</body>
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</html>
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