[Sidefx-houdini-list] Rman VOP displace shader

Jeff Higgins jeffrey.higgins at gmail.com
Mon Jun 18 13:59:52 EDT 2007


you can use teh FloatToVector VOP and select 3D Point Ouptut for that part.

On 6/18/07, Sean Lewkiw <seanl at rainmaker.com> wrote:
>
> But... but... but.... how?  If I plug a vector into it, (I assume you
> mean the aaNoise VOP), it errors.  I tried to roll my own aaNoise and
> change the sig of offset to be a vector, but that didn't work, (although
> it didn't error).  How do I pass in three floats (I assume you mean a
> vector), to an input expecting a point?
>
> Thanks in advance,
> Sean
>
> Louis Dunlevy wrote:
> > You'll notice the offset input is set to be a point rather than a
> > vector. PRman transforms that as the camera moves.
> >
> > Bad SESI >:o  .. naughty naughty....
> >
> > just pass in the offset as 3 floats and combine them! 8-)
> >
> > Sean Lewkiw wrote:
> >> Hi,
> >>
> >> I've built an RMAN VOP displacement shader using the VOP aanoise.
> >> When I animate the camera, the noise moves.  So I added an
> >> rsl_transform node, from "current" to "world". Still moves.  Tried an
> >> in-line VOP with:
> >>
> >> transform("object",P);
> >>
> >> ... no joy.  Tried:   vtransform("current", "world", P);
> >>
> >> ... no joy.  Then I tried to pipe the first transform above into
> >> another in-line VOP with
> >>
> >> noise(pp*10) * .2;
> >>
> >> ... and it works, the noise sticks.  Is the Houdini RMAN aanoise VOP
> >> broken?  (I see lots of space change warnings in my .err files about
> >> the voplib.h files.)
> >>
> >> Sean
> >>
> >
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> Sean Lewkiw
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