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Anonymous
en respuesta a: john.vellek

Hi John, 

 

Thank you for that! 

Haven't seen your reply with the download link, sorry about that. 

So worked on with what I had at hand.

As the designer of the file didn't sent a reliable obj file upon further, specific request, just this cluttered mess of a dwg. 

 

In reality it was a design of a waterpark slide. 

There was a separate file for the slide and for the steel structure. 

Yesterday I split/batch exported the dwg of the slide to separate dwg-s by each layer, then batch imported 1000 dwg-s into 3dsmax.

Exported the result as 20 separate obj files, that I imported into blender to join them together and remove doubles. 

 

Today, worked on the steel structure in a different way. 

Opened it in 3dsmax first -started opening at around 9:50 am and it opened fully around 1:00 pm. 

Then exported it to an obj, which only took 2 minutes. 

Opening it in blender, removing doubles -ending up with a file of 137000 faces. 

 

The main target tool was archicad. It takes downloading a goodies extension pack from graphisoft to be able to import 3ds files...

so the target format had to be 3ds. 

Then learned that there is a 64000 max face limit for models to be saved as 3ds. 

Added a decimate modifier in blender so now both half of the slides and the steel structure is built up only of 60000 faces. 

You can imagine how horrible it looks -topology is off, faces are missing, non-manifold everywhere. 

 

Tomorrow I'll continue the following route -opening a dwg file made from batch importing the remaining exported dwg-s from yesterday with 3dsmax, 

exporting it to obj and processing the obj in blender. 

I assume 3dsmax can do the same as blender however I'm not familiar with max's functionality. Had only ever used it for a day some 15 years ago? 

 

 

All in all the flaw was relying on simple functionality that can process layers in small numbers -theoretically autocad can merge layers the first place-. 

Then, batch exporting was a life saver -or was it. If one can wait 3dsmax to import a dwg file, it's pretty easy further on. 

So probably modifying the codes of the batch exporter autolisp file could serve as a middle ground -splitting a dwg to separate ones with a set number of layers.

 

Best would have been if autocad offered a way to export obj files. Somehow exported fbx files are outdated and not compatible with blender, and, judged by the other experience autocad would hang upon saving.