In article <3a35f681$1@news.povray.org>, "Wlodzimierz ABX Skiba" 
<abx### [at] abxartpl> wrote:

> I thought of your proposition and looked at the source of warps whole 
> night and finnaly I think there is big misunderstand, You Chris and 
> Christoph Hormann think that I deform point only ones but every 
> deformation which I need must be bi-directional/reversable/invertable 
> well defined deformation f(x,y,z) must have brather or sister as 
> undeformation g(x,y,z) where:
> A=f(B) and B=g(A)

Ok, I thought your patch used a method similar to the isosurface to find 
the intersections, but generated the functions automatically from a 
specified object and simply displaced the function. I still don't 
entirely understand what you are doing...but it looks more like 
simulating curved rays with short segments.


> is inverted function of turbulance and/or warps builded in povray

Unfortunately, no, there aren't any functions to invert warps in 
POV-Ray...and many warps aren't reversable.
If it only works with invertable warps, it is a lot more limited than I 
thought...maybe another method could be used in addition to what you 
wrote. Type 0 deform objects would be what you have now and would use 
special, reversable deformations, type 1 deform objects would convert 
the object to an isosurface function and apply a warp. Type 1 would be 
more versatile, but also potentially slower/less accurate.


> > If you want only part of the object to be deformed,
> > you should probably use
> > a union of a deform object with ordinary objects.
> with wasting memory if this could be omited ?

Hmm, I wasn't considering memory use...


> hmm, but parameters of accuracy should be defined for every 
> deformation becouse every type of deformations could have "density" 
> of changing, "denisty" of turbulencing than perhaps

Well, I was thinking of it in terms of warps, all the deformations would 
be put in a single chain of warps rather than nested deformations, so 
only a single accuracy would be needed, and it would only have to handle 
the finest detail of all the deformations put together.

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

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