我想在Threejs的单个画布中显示两个3d模型。为了完成此任务，我从Threejs官方网站上更改了this example。 此示例非常适合显示几何。
scene.add( new THREE.Mesh( geometry, material ) );
但是当我用
替换它时var loadingManager = new THREE.LoadingManager();
var loader = new THREE.ColladaLoader( loadingManager );
loader.load( models[i], function ( collada ) {
scene.add(collada.scene);
} );
连同所有其他必需模型一起出现，但是所有单独的模型都出现在单个场景中。
这是我正在使用的代码
<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - multiple elements</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<style>
* {
box-sizing: border-box;
-moz-box-sizing: border-box;
}
body {
color: #000;
font-family:Monospace;
font-size:13px;
background-color: #fff;
margin: 0;
}
#info {
position: absolute;
top: 0; width: 100%;
padding: 5px;
text-align:center;
}
#content {
position: absolute;
top: 0; width: 100%;
z-index: 1;
padding: 3em 0 0 0;
}
a {
color: #0080ff;
}
#c {
position: absolute;
left: 0;
width: 100%;
height: 100%;
}
.list-item {
display: inline-block;
margin: 1em;
padding: 1em;
box-shadow: 1px 2px 4px 0px rgba(0,0,0,0.25);
}
.list-item .scene {
width: 200px;
height: 200px;
}
.list-item .description {
color: #888;
font-family: sans-serif;
font-size: large;
width: 200px;
margin-top: 0.5em;
}
</style>
</head>
<body>
<canvas id="c"></canvas>
<div id="content">
<div id="info"><a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> - multiple elements - webgl</div>
</div>
<script src="build/three.js"></script>
<script src="examples/OrbitControls.js"></script>
<script src="examples/ColladaLoader.js"></script>
<script src="examples/Detector.js"></script>
<script id="template" type="notjs">
<div class="scene"></div>
<div class="description">Scene $</div>
</script>
<script>
if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
var canvas;
var scenes = [], renderer;
init();
animate();
function init() {
canvas = document.getElementById( "c" );
models = ['elf/elf.dae', 'stormtrooper/stormtrooper.dae']
var template = document.getElementById( "template" ).text;
var content = document.getElementById( "content" );
for ( var i = 0; i < 2; i ++ ) {
var scene = new THREE.Scene();
// make a list item
var element = document.createElement( "div" );
element.className = "list-item";
element.innerHTML = template.replace( '$', i + 1 );
// Look up the element that represents the area
// we want to render the scene
scene.userData.element = element.querySelector( ".scene" );
content.appendChild( element );
var camera = new THREE.PerspectiveCamera( 50, 1, 1, 10 );
camera.position.z = 2;
scene.userData.camera = camera;
var controls = new THREE.OrbitControls( scene.userData.camera, scene.userData.element );
controls.minDistance = 2;
controls.maxDistance = 5;
controls.enablePan = false;
controls.enableZoom = false;
scene.userData.controls = controls;
// scene.add( new THREE.Mesh( geometry, material ) );
var loadingManager = new THREE.LoadingManager();
var loader = new THREE.ColladaLoader( loadingManager );
loader.load( models[i], function ( collada ) {
scene.add(collada.scene);
} );
scene.add( new THREE.HemisphereLight( 0xaaaaaa, 0x444444 ) );
var light = new THREE.DirectionalLight( 0xffffff, 0.5 );
light.position.set( 1, 1, 1 );
scene.add( light );
scenes.push( scene );
}
renderer = new THREE.WebGLRenderer( { canvas: canvas, antialias: true } );
renderer.setClearColor( 0xffffff, 1 );
renderer.setPixelRatio( window.devicePixelRatio );
}
function updateSize() {
var width = canvas.clientWidth;
var height = canvas.clientHeight;
if ( canvas.width !== width || canvas.height !== height ) {
renderer.setSize( width, height, false );
}
}
function animate() {
render();
requestAnimationFrame( animate );
}
function render() {
updateSize();
canvas.style.transform = `translateY(${window.scrollY}px)`;
renderer.setClearColor( 0xffffff );
renderer.setScissorTest( false );
renderer.clear();
renderer.setClearColor( 0xe0e0e0 );
renderer.setScissorTest( true );
scenes.forEach( function( scene ) {
// so something moves
scene.children[ 0 ].rotation.y = Date.now() * 0.001;
// get the element that is a place holder for where we want to
// draw the scene
var element = scene.userData.element;
// get its position relative to the page's viewport
var rect = element.getBoundingClientRect();
// check if it's offscreen. If so skip it
if ( rect.bottom < 0 || rect.top > renderer.domElement.clientHeight ||
rect.right < 0 || rect.left > renderer.domElement.clientWidth ) {
return; // it's off screen
}
// set the viewport
var width = rect.right - rect.left;
var height = rect.bottom - rect.top;
var left = rect.left;
var top = rect.top;
renderer.setViewport( left, top, width, height );
renderer.setScissor( left, top, width, height );
var camera = scene.userData.camera;
//camera.aspect = width / height; // not changing in this example
//camera.updateProjectionMatrix();
//scene.userData.controls.update();
renderer.render( scene, camera );
} );
}
</script>
</body>
然后here可以找到此代码中使用的所有模型和脚本。压缩文件包含所有代码。