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Hi All:
Perhaps I've wake up a bit dazed this sunday, but I can't figure the
solution for a problem I'm having. First, what I try to do is not usual,
or at least I never needed to do it.
In a megapov scene, I've two internally generated hf (with pattern
image type), wich I simply unioned to get my terrain. The union looks
very nice, and I already placed, both by hand and with trace(), numerous
objects in it. So, the memory comsumption increased greatly. As these
two height_fields are *really* big, to save memory I tough on creating
only one height_field with the exact same shape as the union. But I
can't find a pattern type to do this. Average, of course, doesn't work:
I need the max of the two values, not the average... can anyone figure a
way to do this? A "maximum" pattern type would have helped a lot, but it
doesn't exists...
--
Jaime Vives Piqueres
La Persistencia de la Ignorancia
http://www.ignorancia.org/
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Jaime Vives Piqueres wrote:
>
> In a megapov scene, I've two internally generated hf (with pattern
> image type), wich I simply unioned to get my terrain. The union looks
> very nice, and I already placed, both by hand and with trace(), numerous
> objects in it. So, the memory comsumption increased greatly. As these
> two height_fields are *really* big, to save memory I tough on creating
> only one height_field with the exact same shape as the union. But I
> can't find a pattern type to do this. Average, of course, doesn't work:
> I need the max of the two values, not the average... can anyone figure a
> way to do this? A "maximum" pattern type would have helped a lot, but it
> doesn't exists...
>
How about using pigment functions and the 'max()' function?
Something like:
#declare fn_1=function { pigment { ... } }
#declare fn_2=function { pigment { ... } }
#declare fn_hf=function { max(fn_1(x, y, z), fn_2(x, y, z)) }
Christoph
--
Christoph Hormann <chr### [at] gmx de>
IsoWood include, radiosity tutorial, TransSkin and other
things on: http://www.schunter.etc.tu-bs.de/~chris/
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> How about using pigment functions and the 'max()' function?
>
> Something like:
>
> #declare fn_1=function { pigment { ... } }
> #declare fn_2=function { pigment { ... } }
>
> #declare fn_hf=function { max(fn_1(x, y, z), fn_2(x, y, z)) }
Yes! That's it! I was just trying with the pigment function, but I
would have expended much more time to figure out this one, wich is
perhaps the only way to get it working. Thanks!
--
Jaime Vives Piqueres
La Persistencia de la Ignorancia
http://www.ignorancia.org/
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