Re: Geoshaders & external mi flies

[Amaan Akram <xsilist(at)warpedspace.org>]

Hi Philipp,

thanks for the heads up. I did read the lamrug page and somewhere in 
that article the author mentioned that not all 3D applications let you 
load in external mi files. I was hoping that XSI would not be one of 
them, but as you have mentioned, it's more of a mental ray limitation of 
not supporting mi_api_object_file in 3rd party integrations.

thanks
amaan

Philipp Oeser wrote:
> Hi,
>
> just to clearify:
> You will still have to write your own parser (.mi or .obj for example) 
> and build all geometry/UV/Normal/motionvector etc. from scratch, 
> because using "mi_api_object_file" is restricted to mentalray 
> standalone (never really got the reason for that...)
> Cant read in mi-files directly...if you want to render directly in 
> XSI, that is.
> Have a look here:
>
> http://www.lamrug.org/resources/placeholdertips.html
>
> Greetz
> Philipp
>
>
> Amaan Akram schrieb:
> > Hi Sebastian,
> >
> > Thanks for letting me know that it's possible. I am hoping to 
> > populate a scene with low-res geometry and have it swapped out with 
> > high rez one via a geo shader when a ray hits the bounding box.
> >
> > thanks
> > amaan
> >
> > Sebastian Faber wrote:
> > > Yes it is possible. We did it in our inhouse crowd tool. Another 
> > > possibility
> > > is to read a point cache within the geo shader.
> > >
> > >
> > >
> > >
> > >
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> > > -----Ursprüngliche Nachricht-----
> > > Von: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] Im 
> > > Auftrag von
> > > Amaan Akram
> > > Gesendet: Donnerstag, 1. Mai 2008 10:51
> > > An: XSI(at)Softimage.COM
> > > Betreff: Geoshaders & external mi flies
> > >
> > > Hello everyone,
> > >
> > > I've got a scene with potentially a lot of memory-hungry polygonal 
> > > data and was wondering if it is possible to use Mental Ray 
> > > Placeholders in XSI to introduce on-demand object loading and flushing.
> > > Is it possible to load external .mi files from within a geoshader in 
> > > XSI's mental ray (3.5?) implementation?
> > >
> > > thanks,
> > > amaan
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