我正在试验 http://www.learningwebgl.com 中提供的代码，并且我专门尝试加载我有一个 json 图像，它与我的 html 文件位于同一目录中，但它没有被加载，
代码是：-
http://www.pasteall.org/23783
在 http://www.learningwebgl .com 我从第 14 课中获取了加载茶壶的代码，并在第 1 课中使用了它。
我开始认为问题可能是我在加载文件之前就绘制了对象。
当我尝试使用 firebug 进行调试时，出现错误，指出我的变量应该保存我正在加载的立方体的顶点位置，但未定义，
我不是专家，因此调试困扰着我。
等待答复
谢谢
I was experimenting with the code provided in http://www.learningwebgl.com and i was specifically trying to load a json image that resides in the same directory as my html file, but it is not getting loaded,
the code is :-
http://www.pasteall.org/23783
In http://www.learningwebgl.com i took the code that loaded a Teapot from lesson 14 and used it in Lesson 1.
I am starting to think the problem maybe that I am drawing the object even before the file is loaded.
When i tried to debug using firebug am getting an error saying that my variable that is supposed to hold the vertex positions of the cube that i am loading is not defined
I am not an expert so debugging is bugging me.
Waiting for an answer
Thanks
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评论（1）
您的问题听起来像是由于
XMLHttpRequest是异步的（即request.send()启动读取，但不等待其完成）。更改为同步 json 加载
尝试通过将行
您可以在 http://www.w3.org/TR/XMLHttpRequest/
Your problem sounds like it is due to the fact that
XMLHttpRequestis asynchronous (i.e.request.send()initiates a read, but does not wait for it to finish).Try making the json load synchronous by changing the line
to
You can find the documentation for
XMLHttpRequestat http://www.w3.org/TR/XMLHttpRequest/