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I was checking max gradient of an isosuface in order to speed up rendering.
my code is:
#declare Tentacule = isosurface {
// function { TentaFct(x*(1+0.006*(6-y)*sin(12*atan2(z,x))),
select(y,0.75*y,y), z*(1+0.006*(6-y)*sin(12*atan2(z,x))) ) }
function { TentaFct( x , y , z ) }
max_gradient 2
evaluate 2 1.05 0.95
contained_by {
box {<5.5,-0.3,5.5>,<-5.5,-15,-5.5>}
}
#if (Finish > 0)
hollow
interior { ITent }
#end
texture { TTent }
}
And the result in message window is
Warning: Evaluate found a maximum gradient of 2.000 and an average
gradient of 2.000. The maximum gradient variation was 0.000.
It is recommended to adjust the parameters of 'evaluate' to:
First parameter less than 2.000
Second parameter less than 1.000 and greater than 1.0
Third parameter greater than 1.000 and less than 1.0
What does it mean?
Chaps
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In article <3db83ddf$1@news.povray.org> , "chaps" <cha### [at] yahoo com> wrote:
> I was checking max gradient of an isosuface in order to speed up rendering.
<snip>
> What does it mean?
"max_gradient 2.0" and reading the manual why evaluate is unnecessary to
find a better max_gradient.
Thorsten
____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde
Visit POV-Ray on the web: http://mac.povray.org
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Right?
2 was the first value that I wrote, that's chance. I run to play Loto.
Chaps
"Thorsten Froehlich" <tho### [at] trfde> wrote in message
news:3db845be$1@news.povray.org...
> In article <3db83ddf$1@news.povray.org> , "chaps" <cha### [at] yahoocom>
wrote:
>
> > I was checking max gradient of an isosuface in order to speed up
rendering.
> <snip>
> > What does it mean?
>
> "max_gradient 2.0" and reading the manual why evaluate is unnecessary to
> find a better max_gradient.
>
> Thorsten
>
> ____________________________________________________
> Thorsten Froehlich, Duisburg, Germany
> e-mail: tho### [at] trfde
>
> Visit POV-Ray on the web: http://mac.povray.org
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