为什么不显示模型？

Question

我正在尝试实现多模型模型加载，但我加载的模型没有显示。我的代码与此代码相同 https://github.com/Autodesk-Forge/learn.forge.viewmodels/tree/nodejs,the only difference is in the ForgeViewer.js file, where I use the code from this article https://forge.autodesk.com/cloud_and_mobile/2016/02/model-aggregation-with-view-data-api-exposed.html。在编写函数 launchViewer (token, urn) 时，我得到了这个 "GET error https://developer.api.autodesk.com/derivativeservice/v2/manifest/undefined?domain=http%3A%2F%2Flocalhost%3A3000 400 (Bad Request)"，并且在不添加令牌的情况下，我没有收到错误，但模型没有显示。 oss.js 文件与第一篇文章中的文件完全相同。

下面是 ForgeViewer.js 文件的代码。

function launchViewer(urn) {
  return new Promise((resolve, reject) => {
    try {

      var options = {
        env: 'AutodeskProduction',
        getAccessToken: getForgeToken
      };
      console.log(options);
      Autodesk.Viewing.Initializer(options, () => {
        Autodesk.Viewing.Document.load(
          'urn:' + urn,
          (document) => {
            var rootItem = document.getRootItem();

            var geometryItems3d = Autodesk.Viewing.Document.
            getSubItemsWithProperties(
              rootItem, {
                'type': 'geometry',
                'role': '3d'
              },
              true
            );

            var geometryItems2d = Autodesk.Viewing.Document.
              getSubItemsWithProperties(
              rootItem, {
                'type': 'geometry',
                'role': '2d'
              },
              true
            );

            var got2d = (geometryItems2d && geometryItems2d.length > 0);
            var got3d = (geometryItems3d && geometryItems3d.length > 0);

            console.log(options);
            console.log(document);
            console.log(rootItem);
            console.log(geometryItems2d);
            console.log(geometryItems3d);
            console.log(got2d);
            console.log(got3d);

            if (got2d || got3d) {
              var pathCollection = [];
              geometryItems2d.forEach((item) => {
                pathCollection.push(document.getViewablePath(item));
              });

              geometryItems3d.forEach((item) => {
                pathCollection.push(document.getViewablePath(item));
              });

              return resolve(pathCollection);
            } else {

              return reject('no viewable content')
            };
          },
          (err) => {
            console.log(options);
            console.log('Error loading document... ');
            //Autodesk.Viewing.ErrorCode
            switch (err) {
              // removed for clarity, see full sample
            }
          });
      });
    } catch (ex) {
      return reject(ex);
    }
  });
}

function getForgeToken(callback) {
  jQuery.ajax({
    url: '/api/forge/oauth/token',
    success: function (res) {
      callback(res.access_token, res.expires_in)
    }
  });
}

Answer 1

您是否成功并完整地转换了模型（参见教程 here）并将模型的 based64 编码对象 ID（例如 var urn = btoa('urn:adsk.a360betadev:fs.file:business.lmvtest.DS5a730QTbf1122d07')）提供给加载方法？

 Autodesk.Viewing.Document.load(
          'urn:' + urn, //The base64 encoded object ID of your translated model object goes here
...

如果没有它，您的错误消息中的清单请求中的骨灰盒部分将是 undefined，因此会出现错误。

为什么不显示模型？

Why is the model not displayed?

autodesk-viewer