我正在使用 OBJLoader 加载大型 3D 模型（在 .obj 文件中描述），但它将整个文件加载为单个 Object3D 对象。使用 scene.add(object) 它将整个对象添加到场景中。
我需要选择选定的网格并更改其一些属性，但是当我添加鼠标功能并使用 Ray.intersectObjects 尝试获取选定的网格时，它永远不会工作。我找不到我犯错的地方。
希望获得一些帮助以使其正常工作。谢谢！
这让我困惑了几天。以下是我的全部代码：</p>
<!doctype html>
<html lang="en">
<head>
<title>three.js webgl - loaders - OBJ loader</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<style>
body {
font-family: Monospace;
background-color: #000;
color: #fff;
margin: 0px;
overflow: hidden;
}
#info {
color: #fff;
position: absolute;
top: 10px;
width: 100%;
text-align: center;
z-index: 100;
display:block;
}
#info a, .button { color: #f00; font-weight: bold; text-decoration: underline; cursor: pointer }
</style>
</head>
<body>
<div id="info">
<a href="http://github.com/mrdoob/three.js" target="_blank">three.js</a> - OBJLoader test
</div>
<script src="../build/Three.js"></script>
<script src="js/loaders/OBJLoader.js"></script>
<script src="js/Detector.js"></script>
<script src="js/Stats.js"></script>
<script>
var container, stats;
var camera, scene, renderer;
var mouseX = 0, mouseY = 0;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
var _mouse = { x: 0, y: 0 },
objects = [],
_projector = new THREE.Projector();
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
scene = new THREE.Scene();
camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 2000 );
camera.position.z = 100;
scene.add( camera );
var ambient = new THREE.AmbientLight( 0x101030 );
scene.add( ambient );
var directionalLight = new THREE.DirectionalLight( 0xffeedd );
directionalLight.position.set( 0, 0, 1 ).normalize();
scene.add( directionalLight );
var texture = THREE.ImageUtils.loadTexture( 'textures/ash_uvgrid01.jpg' );
var loader = new THREE.OBJLoader();
loader.load( "obj/male02/male02.obj", function ( object ) {
for ( var i = 0, l = object.children.length; i < l; i ++ ) {
object.children[ i ].material.map = texture;
}
object.position.y = - 80;
object.position.z = - 160;
scene.add( object );
objects.push( object );
} );
// RENDERER
renderer = new THREE.WebGLRenderer();
renderer.setSize( window.innerWidth, window.innerHeight );
container.appendChild( renderer.domElement );
document.addEventListener( 'mousedown', onDocumentMouseDown, false );
}
function onDocumentMouseDown( event ) {
event.preventDefault();
// find intersections
_mouse.x = (event.clientX / window.innerWidth) * 2 - 1;
_mouse.y = - (event.clientY / window.innerHeight) * 2 + 1;
var vector = new THREE.Vector3( _mouse.x, _mouse.y, 1 );
var ray = _projector.pickingRay( vector, camera );
var intersects = ray.intersectObjects( scene.children );
if ( intersects.length > 0 ) {
alert("selected!");
_SELECTED_DOWN = true;
}
}
function animate() {
requestAnimationFrame( animate );
render();
}
function render() {
renderer.render( scene, camera );
}
</script>
</body>
</html>