mesh data export to json

[Anonymous]

I try to get the geometry info from ***.rvt, to a json data ,which can I load to draw geometry by three.js.

This page: https://thebuildingcoder.typepad.com/blog/2013/07/adn-mesh-data-custom-exporter-to-json.html

Him had show me how to do.

Of course, the demo is right and work well by some changes from revit 2015or6 to 2019.

https://thebuildingcoder.typepad.com/files/curvedwall.rvt

this reivt file work well in my computer.

But when I do with other revit file, error comes from the 

     exporter.Export(view)

which the error say: cannot devide by zero

PS:The view is not null.

Could anyone tell any ideas? 

[jeremytammik]

Run the add-in in the debugger and see for yourself which line of code is causing the problem.

Then you will probably be able to see how to fix it as well.

Cheers,

Jeremy

[Anonymous]

It is not a good way to find the error by the debugger.

The debugger will just raise a error top of the logic.Which I mean,it would not show the error in CustomExportContext.

of course,may be I do the debugger not the right way.

Finally I add the try catch and get the error:

the file xxx.rvt you show before is different from the file I actually use. which I mean:

the CustomExportContext just started and go into the elementbegin and then,to the elementend.

the Complete methd will do x/0 ,which show the error top: cannot devide by zero.

Now ,may I had solved this error. 

Thank you very much,Thanks for your demo about the use of CustomExportContext.

[jeremytammik · Accepted solution]

Glad to hear you resolved your problem.

By the way, rather belatedly, may I point out that others ran into the same problem in the past:

https://thebuildingcoder.typepad.com/blog/2016/07/exporting-rvt-bims-to-webgl-and-forge.html#3

The exception thrown by the internal custom exporter implementation can simply be caught and ignored:

https://github.com/jeremytammik/CustomExporterAdnMeshJson/commit/23a95aad8f4a3cca85a72b32e2b699bde1d...

Cheers,

Jeremy

[jeremytammik]

Shared for posterity by The Building Coder:

https://thebuildingcoder.typepad.com/blog/2018/12/dynamo-symbol-vs-type-and-exporter-exception.html#...

Cheers,

Jeremy