[Sidefx-houdini-list] CAD to Houdini
simon at primalpictures.com
Mon Oct 2 14:50:34 EDT 2006
You might want to take a look at Rhino too, we've used it a lot for
converting iges files from cad into Houdini. You always lose some trims
but its not bad in a lot of cases. There's some specific export settings
you need for Houdini but I can let you have them if you want to try that
From: sidefx-houdini-list-bounces at sidefx.com
[mailto:sidefx-houdini-list-bounces at sidefx.com] On Behalf Of Jed
Sent: 02 October 2006 15:36
To: sidefx-houdini-list at sidefx.com
Subject: Re: [Sidefx-houdini-list] CAD to Houdini
Many thanks to all for the great feedback-!
On Oct 2, 2006, at 10:01 AM, Jerry wrote:
> If you have maya, there is a route you can go which i've used a
> couple of times.
> I've never tried it with trimmed surfaces though, but i'm sure
> there's a workaround if you can separate the
> trims out.
> Anyway it goes something like this.
> Open the surfaces in U and V in maya, then convert to poly. export
> as an obj. Load obj into houdini then
> convert to nurbs and close in U and V.
> Is a bit cumbersome, but i've found it works pretty well.
> Hope that helps
> John Coldrick wrote:
>> On Monday 02 October 2006 09:19, Peter Robbinson wrote:
>>> I would try the .iges route next. That format is more closely
>>> with CAD conversions and there are usually more options for
>>> them to control the conversion.
>> You'll need two things for this - possibly three. We've just
>> been through this and ended up with(unfortunately) polys because
>> we didn't have a lot of control or time over the source files
>> (originally ProE). We got Polytrans, which is great, but while it
>> reads ProE files natively, that won't help you get it to an IGES
>> format readable by Houdini(esp with trim surfaces). You need to
>> get IGES files saved out by whatever program is being used to
>> design the files, then run them through Polytrans, which has it's
>> strength in being able to beat up any of the hundreds of mangled
>> IGES variants out there(and there are hundreds). Unfortunately,
>> I'm not sure you'll be able to take advantage of exporting into an
>> IGES file readable by Houdini - you'll need to import directly
>> into Maya(!) because that's the only one they support directly.
>> Getting it from Maya to Houdini may be troublesome in itself.
>> Bottom line, it's a bitch. It *really* depends on the flavour
>> IGES, and as mentioned the state of that format is a mess when
>> going between packages. You might try IGES and it will work first
>> time. It probably won't. Importing IGES trim surfaces from
>> Polytrans directly into Houdini resulted in a mess. Everyone
>> complains about Houdini's handling of IGES, but after this
>> experience, at least I understand why. The main guy at Polytrans
>> has been focused heavily on IGES for many years - it's a full time
>> Personally, I'd like to get the Polytrans guys talking to SESI,
>> not sure when that will happen though. They're right here in
>> town, guys. :)
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