Question

我正在尝试在three.js中加载json几何体，但我不断得到three.js:35740 Uncaught TypeError: Cannot read property 'index' of undefined at BufferGeometryLoader.parse (three.js:35740) at Object.onLoad (three.js:35730) at XMLHttpRequest.<anonymous> (three.js:30798)

这分别是我的代码和我的json文件：

var loader = new THREE.BufferGeometryLoader();

loader.load(

    'models/box2.json',

    function (geometry) {

        var material = new THREE.MeshBasicMaterial( { color: 0xF5F5F5 } );

        var object = new THREE.Mesh( geometry, material );

       // object.name = 'shirt';

        mesheto = object;

        scene.add(object);

        GameLoop();
    }
);


{
"uvs":[],
"normals":[-5.32907e-15,-1,2.98023e-08,1.06581e-14,1,-2.98023e-08,1,4.47034e-08,2.83122e-07,-2.83122e-07,-7.45059e-08,1,-1,-1.3411e-07,-2.23517e-07,2.38419e-07,1.78814e-07,-1],
"metadata":{
    "type":"Geometry",
    "version":3,
    "vertices":8,
    "generator":"io_three",
    "uvs":0,
    "normals":6,
    "faces":6
},
"vertices":[1,-1,-1,1,-1,1,-1,-1,1,-1,-1,-1,1,1,-1,0.999999,1,1,-1,1,1,-1,1,-1],
"faces":[33,0,1,2,3,0,0,0,0,33,4,7,6,5,1,1,1,1,33,0,4,5,1,2,2,2,2,33,1,5,6,2,3,3,3,3,33,2,6,7,3,4,4,4,4,33,4,0,3,7,5,5,5,5]

}

有人可以帮我解释导致此错误的原因吗？

Answer 1

看起来您{J}数据格式错误BufferGeometry。 BufferGeometryLoader期望以下格式中的JSON数据：

{
  data: {
    index: [],
    attributes: {
      position: {
        array: [],
        itemSize: 0,
        normalized: 0
      }
    }
  }
}

您所拥有的内容似乎是来自Geometry对象的数据，可由JSONLoader解析。

您可以使用以下内容将Geometry转换为BufferGeometry

// someGeometry is a THREE.Geometry object
var bg = new THREE.BufferGeometry().fromGeometry(someGeometry);

三个Js BufferGeometry Loader给了我一个＆＃34; Uncaught TypeError：无法读取属性＆＃39; index＆＃39;未定义＆＃34;为什么？

1 个答案: