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In article <3DDCFF73.C06ACF8C@frege.mathematik.uni-freiburg.de>,
Mark Weyer <wey### [at] frege mathematikuni-freiburgde> wrote:
> You are right. But I still prefer the empty-object-method for
> some applications, because it is more elegant to my taste.
It is in no way "elegant". It needlessly slows things down, takes
memory, and is just an ugly hack. The array method looks like the best
way to do it: simple, flexible, doesn't waste processing power or do
other odd things that could cause trouble. You don't need a "nothing"
object.
--
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/
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Mark Weyer <wey### [at] fregemathematikuni-freiburgde> wrote:
> What is your suggestion for maximum speed?
Don't use an object at all. That achieves maximum speed.
--
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -
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Mark Weyer <wey### [at] fregemathematikuni-freiburgde> wrote in
news:3DDCF201.8E1826C9@frege.mathematik.uni-freiburg.de
> Any suggestions?
maybe :
isosurface { function { 1 } gradient 0.01 accuracy 100000
contained_by { box { -1e5,+1e5 } }
--
#macro g(U,V)(.4*abs(sin(9*sqrt(pow(x-U,2)+pow(y-V,2))))*pow(1-min(1,(sqrt(
pow(x-U,2)+pow(y-V,2))*.3)),2)+.9)#end#macro p(c)#if(c>1)#local l=mod(c,100
);g(2*div(l,10)-8,2*mod(l,10)-8)*p(div(c,100))#else 1#end#end light_source{
y 2}sphere{z*20 9pigment{function{p(26252423)*p(36455644)*p(66656463)}}}//M
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Mark Weyer wrote:
> I occasionally (usually to feed parameters to CSG macros where) need an
> empty object.
>
> [...]
>
> Any suggestions?
sphere { 0, 0 clipped_by { sphere { 1, 0 } }
--
Ignacio Fernández Galván
Linux User #289967 (counter.li.org)
PGP Pub Key ID: 0x01A95F99 (pgp.escomplinux.org)
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