Hi, all.

Is there a way to wrap a height field around a non-planar surface (say the
face of a hemisphere?)

I know I can simulate this with bump-mapping, but the problem is that I ONLY
want the bumps.  If I create the sphere, bump-map it with the appropriate
texture, and then do a difference and cut out all of the sphere except for
the bumps, will the bumps still be visible??

(If it were flat, I'd use a height field and simply do a difference to
remove the height zero portion of the field.  Problem is that flat just
won't do what I want, and trying to generate the emblem I want using
primitive objects will take months, whereas it would be a matter of minutes
with the method I've described if it can be done.)

--
ZuluNiner{dbd}
ZuluNiner at fuckyou dot co dot uk

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I think you could do such a thing in polyray, but I don't know the specifics.

ZuluNiner wrote:

> Hi, all.
>
> Is there a way to wrap a height field around a non-planar surface (say the
> face of a hemisphere?)
>
> I know I can simulate this with bump-mapping, but the problem is that I ONLY
> want the bumps.  If I create the sphere, bump-map it with the appropriate
> texture, and then do a difference and cut out all of the sphere except for
> the bumps, will the bumps still be visible??
>
> (If it were flat, I'd use a height field and simply do a difference to
> remove the height zero portion of the field.  Problem is that flat just
> won't do what I want, and trying to generate the emblem I want using
> primitive objects will take months, whereas it would be a matter of minutes
> with the method I've described if it can be done.)
>
> --
> ZuluNiner{dbd}
> ZuluNiner at fuckyou dot co dot uk



--
Given a lever long enough, one can move the world with little force
      MJ Engh

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ZuluNiner wrote:

> Hi, all.
>
> Is there a way to wrap a height field around a non-planar surface (say the
> face of a hemisphere?)

Not easily, and certainly not with Moray.

However... leveller (a HF editor) has a feature that lets you do this, and
exports to DXF, I think.. I don't know if Moray can handle this, but the file
converter might.

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Just as a note- the files it generates are HUGE!!!!!(Within 1-2 megs, at
least...for a fairly small HF)

Simon de Vet wrote:

> ZuluNiner wrote:
>
> > Hi, all.
> >
> > Is there a way to wrap a height field around a non-planar surface (say the
> > face of a hemisphere?)
>
> Not easily, and certainly not with Moray.
>
> However... leveller (a HF editor) has a feature that lets you do this, and
> exports to DXF, I think.. I don't know if Moray can handle this, but the file
> converter might.



--
Given a lever long enough, one can move the world with little force
      MJ Engh

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Simon de Vet wrote:
> 
> ZuluNiner wrote:
> 
> > Hi, all.
> >
> > Is there a way to wrap a height field around a non-planar surface (say the
> > face of a hemisphere?)
> 
> Not easily, and certainly not with Moray.
> 
> However... leveller (a HF editor) has a feature that lets you do this, and
> exports to DXF, I think.. I don't know if Moray can handle this, but the file
> converter might.

  As far as I know Leveller only supports cylindrical mapping
at this time and has no funtionality for spherical HF mapping.

  The only low cost/free program I know of that offers this is John
Beale's OrbCyl utility which is a stand alone utility designed to
convert a 3D topograpy into a cylindrical or spherical 3d shape
with the attributes of the original topography used. I am fairly
certain that it has support for Pov-Ray but I have not evaluated
the program so cannot say how effective it is.

  OrbCyl can be found at one or both of the links below.

http://www.best.com/~beale/

http://shell3.ba.best.com/~beale/gforge/


Regards,

-- 
Ken Tyler

mailto://tylereng@pacbell.net

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