"Jaime Vives Piqueres" <jai### [at] ignoranciaorg> schreef in bericht
news:42147e4c@news.povray.org...
> I found a sort of "gold mine" with displacement warps on MegaPOV. Here I
> used a wrinkles pattern as base, displaced with a "sandwich" of several
> other patterns:
>

Gmphhh.... I am part of the drooling and towel biting guys here.....
I just feel I have to plunge into this!!
Great landscape! Where is the geysir?

Thomas

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Jaime Vives Piqueres wrote:
> I found a sort of "gold mine" with displacement warps on MegaPOV. Here I
> used a wrinkles pattern as base, displaced with a "sandwich" of several
> other patterns:

Nice.  Note displace warps, esp. type 1 (gradient based) can be quite 
slow and this is a problem when used in isosurfaces of course...

Also note that the displace warp is somewhat a deprecated feature.  It 
is in current MegaPOV because it is a useful feature but there have been 
plans (since the 3.5 development) for a more universal feature allowing 
the same efffects (i.e. function warps). Of course it will be possible 
to implement a displace warp effect with such a new feature - it would 
just require rewriting the code.

And before anyone asks - this has not been implemented until now because 
no one found the time to do so - if someone does it (well coded, 
including documentation, sample scenes etc.) it will be added of course.

Christoph

-- 
POV-Ray tutorials, include files, Sim-POV,
HCR-Edit and more: http://www.tu-bs.de/~y0013390/
Last updated 23 Sep. 2004 _____./\/^>_*_<^\/\.______

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Dave Matthews wrote:
> ...and you really know what you're doing.)

   Me? No, you must be thinking on someone else... ;)

   Seriously, it must be really boring to know exactly what you are 
doing... there is no surprise on the result.

--
Jaime

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Christoph Hormann wrote:
> Nice.  Note displace warps, esp. type 1 (gradient based) can be quite 
> slow and this is a problem when used in isosurfaces of course...

   I'm using type 0, and it doesn't seems specially slow, at least for 
the moment.

> Also note that the displace warp is somewhat a deprecated feature. It
> is in current MegaPOV because it is a useful feature but there have been 
> plans (since the 3.5 development) for a more universal feature allowing 
> the same efffects (i.e. function warps). Of course it will be possible 
> to implement a displace warp effect with such a new feature - it would 
> just require rewriting the code.

   Yes, something more generic would be nice. But I use what I've at the 
moment, and rewriting is not at all a problem: I do it all the time.

   Thanks for the info!

--
Jaime

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Christoph Hormann wrote:

> Also note that the displace warp is somewhat a deprecated feature.  It 
> is in current MegaPOV because it is a useful feature but there have been 
> plans (since the 3.5 development) for a more universal feature allowing 
> the same efffects (i.e. function warps). 

Sounds powerful.  For those like myself who can't quite picture it, 
would such a feature allow one to dynamically change the scale in a 
pattern such as crackle?  You can sort of do it now of course but the 
result is this goopy averaged effect.  Would a function warp allow you 
to do something like make successive rows of cells change scale?

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Jim Charter wrote:
> 
> Sounds powerful.  For those like myself who can't quite picture it, 
> would such a feature allow one to dynamically change the scale in a 
> pattern such as crackle?  You can sort of do it now of course but the 
> result is this goopy averaged effect.  Would a function warp allow you 
> to do something like make successive rows of cells change scale?

Changing the scale of the cells in the crackle pattern would be 
something to do internally in the pattern (and it would no more allow 
the current speedup techniques probably).

Changing the scale of any pattern locally is nothing more than a 
non-linear transform of the coordinates which is already possible at the 
moment.  A function warp would just simplify this a bit.

Christoph

-- 
POV-Ray tutorials, include files, Sim-POV,
HCR-Edit and more: http://www.tu-bs.de/~y0013390/
Last updated 23 Sep. 2004 _____./\/^>_*_<^\/\.______

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