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I've wanted to do this for ages but I could never figure out how. Then this
morning I woke up at 5am with a brain wave! So here it is, povray's cells
pattern with linear blending to create blurry cells!
Very useful if you want to use cells to choose between random patterns, but
you don't want to get hard edges between them.
Source in p.b.s-f
--
Tek
http://evilsuperbrain.com
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Attachments:
Download 'blendedcells1.jpg' (48 KB)
Download 'blendedcells2.jpg' (32 KB)
Download 'blendedcells3.jpg' (37 KB)
Download 'blendedcells4.jpg' (42 KB)
Download 'blendedcells5.jpg' (69 KB)
Preview of image 'blendedcells1.jpg'
Preview of image 'blendedcells2.jpg'
Preview of image 'blendedcells3.jpg'
Preview of image 'blendedcells4.jpg'
Preview of image 'blendedcells5.jpg'
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Tek wrote:
> I've wanted to do this for ages but I could never figure out how. Then this
> morning I woke up at 5am with a brain wave! So here it is, povray's cells
> pattern with linear blending to create blurry cells!
>
> Very useful if you want to use cells to choose between random patterns, but
> you don't want to get hard edges between them.
>
> Source in p.b.s-f
Indeed, you have an evil super brain... ;)
I always wanted to do this, but never figured how. Thanks, it's going
to be very very useful for a lot of things. Please, Tek, keep surprising
us at regular intervals...
--
Jaime
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"Tek" <tek### [at] evilsuperbrain com> wrote in message news:45de8021@news.povray.org...
> I've wanted to do this for ages but I could never figure out how. Then this
> morning I woke up at 5am with a brain wave! So here it is, povray's cells
> pattern with linear blending to create blurry cells!
>
> Very useful if you want to use cells to choose between random patterns, but
> you don't want to get hard edges between them.
>
> Source in p.b.s-f
thanks!! I've been looking for a way of doing this for ages now!
still trying to figure out how exactly it works, but maybe when I'm fully awake
it'll hit me :)
cu!
--
#macro G(b,e)b+(e-b)*C/50#end#macro _(b,e,k,l)#local C=0;#while(C<50)
sphere{G(b,e)+3*z.1pigment{rgb G(k,l)}finish{ambient 1}}#local C=C+1;
#end#end _(y-x,y,x,x+y)_(y,-x-y,x+y,y)_(-x-y,-y,y,y+z)_(-y,y,y+z,x+y)
_(0x+y.5+y/2x)_(0x-y.5+y/2x) // ZK http://www.povplace.com
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Yes! That is perfect!!
Thanks a lot!!
Thomas
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Awesome I'm glad I'm not the only one who'd wanted this trick for ages!
Basically what I'm doing is trilinear blending between the same cells
pattern, offset by 1 square in each direction. Since the blend region is no
bigger than 1 square (actually I mean one cube, i.e. one cell) we just need
to overlay 8 copies of the cell pattern offset by <0,0,0> <0,0,1>, <0,1,1>,
etc... so we have all 8 possible values available for tri-linear blending...
Hopefully that explanation might help... though possibly not.
--
Tek
http://evilsuperbrain.com
"Zeger Knaepen" <zeg### [at] MOVEpovplacecom> wrote in message
news:45deb1c0@news.povray.org...
> "Tek" <tek### [at] evilsuperbraincom> wrote in message
> news:45de8021@news.povray.org...
>> I've wanted to do this for ages but I could never figure out how. Then
>> this
>> morning I woke up at 5am with a brain wave! So here it is, povray's cells
>> pattern with linear blending to create blurry cells!
>>
>> Very useful if you want to use cells to choose between random patterns,
>> but
>> you don't want to get hard edges between them.
>>
>> Source in p.b.s-f
>
> thanks!! I've been looking for a way of doing this for ages now!
> still trying to figure out how exactly it works, but maybe when I'm fully
> awake
> it'll hit me :)
>
> cu!
> --
> #macro G(b,e)b+(e-b)*C/50#end#macro _(b,e,k,l)#local C=0;#while(C<50)
> sphere{G(b,e)+3*z.1pigment{rgb G(k,l)}finish{ambient 1}}#local C=C+1;
> #end#end _(y-x,y,x,x+y)_(y,-x-y,x+y,y)_(-x-y,-y,y,y+z)_(-y,y,y+z,x+y)
> _(0x+y.5+y/2x)_(0x-y.5+y/2x) // ZK http://www.povplace.com
>
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"Tek" <tek### [at] evilsuperbraincom> wrote in message
news:45deb925$1@news.povray.org...
> Awesome I'm glad I'm not the only one who'd wanted this trick for ages!
>
> Basically what I'm doing is trilinear blending between the same cells
> pattern, offset by 1 square in each direction. Since the blend region is no
> bigger than 1 square (actually I mean one cube, i.e. one cell) we just need
> to overlay 8 copies of the cell pattern offset by <0,0,0> <0,0,1>, <0,1,1>,
> etc... so we have all 8 possible values available for tri-linear blending...
>
> Hopefully that explanation might help... though possibly not.
.. need ... caffeine ... !
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Tek wrote:
The effect on the top sphere looks Hella-useful.
-Shay
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Shay nous apporta ses lumieres en ce 25-02-2007 11:19:
> Tek wrote:
>
> The effect on the top sphere looks Hella-useful.
>
> -Shay
Take the second one and add some turbulance.
--
Alain
-------------------------------------------------
Experience demands that man is the only animal which devours his own kind,
for I can apply no milder term to the general prey of the rich on the poor.
Thomas Jefferson
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