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Poser F.A.Q (Updated: 2015 Aug 18 8:24 pm)


 Subject: help, rainbow python math, please, i need help understanding

MistyLaraPrincess opened this issue on Jul 28, 2012 · 19 posts

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  MistyLaraPrincess () ( posted at 1:25PM Sat, 28 July 2012 · edited on 1:33PM Sat, 28 July 2012

found this article for rainbows.  something about HSV->RGB conversion function.

http://objectmix.com/python/352080-how-make-rainbow-rgb-values.html

would someone help me to understand to  make this into poser rainbow?

can a custom color node be made from this?

thanks.  i didn't pass classes after pre-calculus

 

http://docs.python.org/library/colorsys.html



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  bagginsbill () ( posted at 2:00PM Sat, 28 July 2012  · @3963879

Are you asking about Python or asking about materials - or both?

And you ask "can a custom color node be made from this?" - we cannot make custom nodes of any kind. So no.

There is already an HSV node in Poser materials. It will make a rainbow color table from any grayscale pattern.

Setting these up in matmatic is easy, if you use matmatic.

Assuming you have a pattern in "pattern" you would do:

HSV(YELLOW, pattern, 1, 1)

 


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  MistyLaraPrincess () ( posted at 8:33PM Sat, 28 July 2012 · edited on 8:35PM Sat, 28 July 2012 · @3963985


rainbow snowcone time out. cuz 7 hours of fail can be depressing.

 

thanks BB!  rainbows with hsv magick.

after reading the colorsys info, my first thought was the possibilities of working it into a node like color_ramp or wood.  mentioning the wood because it has rings and rainbows usually arch.



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  bagginsbill () ( posted at 9:05PM Sat, 28 July 2012  · @3963995


.


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  bagginsbill () ( posted at 9:09PM Sat, 28 July 2012  · @3963996


.


Renderosity forum reply notifications do not function AT ALL.If you need me to answer something, ask elsewhere.

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  bagginsbill () ( posted at 9:13PM Sat, 28 July 2012  · @3963998


.


Renderosity forum reply notifications do not function AT ALL.If you need me to answer something, ask elsewhere.

I used to have a Rendered-in-Poser image in my signature. Renderosity took it away. 

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  bagginsbill () ( posted at 9:16PM Sat, 28 July 2012  · @3963999


.


Renderosity forum reply notifications do not function AT ALL.If you need me to answer something, ask elsewhere.

I used to have a Rendered-in-Poser image in my signature. Renderosity took it away. 

Cool. <<<<< (sarcasm)


  MistyLaraPrincess () ( posted at 10:39AM Sun, 29 July 2012  · @3964183

oh woww.  thanks!!!

is it possible to make like a soft gradient progressing through the colours?



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  Lully () ( posted at 10:50AM Sun, 29 July 2012 · edited on 10:54AM Sun, 29 July 2012 · @3964185


oh wow, i just tried out the first option with a different colour and got this

 

edited, would help with a pic, lol

 

PPPS, thanks BB  :)

Tools:- Win 7 on Dell Studio XPS, Poserpro2014, zbrush, Marvelous Designer 4, Hex 2.5.0.5, PSP8, PS7, Argyle, Blacksmith3D suite V5, Vue10 Esprit,  A little bit of DAZ and My Brain (just about)


  Lully () ( posted at 11:36AM Sun, 29 July 2012  · @3964204


Spotties :lol:

Tools:- Win 7 on Dell Studio XPS, Poserpro2014, zbrush, Marvelous Designer 4, Hex 2.5.0.5, PSP8, PS7, Argyle, Blacksmith3D suite V5, Vue10 Esprit,  A little bit of DAZ and My Brain (just about)


  MistyLaraPrincess () ( posted at 5:14PM Sun, 29 July 2012  · @3964328

this one looks promising. 

http://www.creative-3d.net/images/p5_material_room.jpg

i can't make out the blue setting, it's not 1.



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  Miss Nancy () ( posted at 6:38PM Sun, 29 July 2012 · edited on 6:42PM Sun, 29 July 2012 · @3964362

if one wants a spectrally accurate rainbow, use bill's shader.  banding is likely as saturation increases.  however, if one wants a smooth day-glo rainbow, try bill's technique he used on his poser 6 lite meter, modified below.  to get more roygbiv, blend two ramps.

hippie rainbow dayglo

p.s. that user defined 22 node in your example might work even better.



  MistyLaraPrincess () ( posted at 8:29PM Sun, 29 July 2012  · @3964386

blend 2 ramps! 

and add in BB's examples for the arches.



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  MistyLaraPrincess () ( posted at 8:32PM Sun, 29 July 2012  · @3964387

Quote - Spotties :lol:

gotta luv the cellular node.  and the random color option.



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  Lully () ( posted at 2:26AM Mon, 30 July 2012  · @3964450

Quote - > Quote - Spotties :lol:

gotta luv the cellular node.  and the random color option.

 

I know, lol. i was just messing around with it all yesterday, you get better ones with the tile option on a very blurry mortar. But this does open a multitude of ideas, I didn't realise you could get a rainbow colours in the mat room with nodes, :)

Tools:- Win 7 on Dell Studio XPS, Poserpro2014, zbrush, Marvelous Designer 4, Hex 2.5.0.5, PSP8, PS7, Argyle, Blacksmith3D suite V5, Vue10 Esprit,  A little bit of DAZ and My Brain (just about)


  MistyLaraPrincess () ( posted at 9:43PM Mon, 30 July 2012 · edited on 9:46PM Mon, 30 July 2012 · @3964890


no chocolate cigars.  groan.  the yellow and green isn't showing

styling is a different matter,    i can never be happy with the roots



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  bagginsbill () ( posted at 10:26PM Mon, 30 July 2012 · edited on 10:27PM Mon, 30 July 2012 · @3964906

You've mistakenly assumed the "V" coordinate goes from 0 to 1 along each hair. The UV coordinates go with the skin. You are reading the U coordinate of the location of the base of each hair - all of which are near the top of the head UV map, so in the blue-violet range.

If you want rainbow hair, you have to get the hidden "W" coordinate. The W coordinate is a 3rd texture dimension going 0 to 1 from base of hair to tip. The only node that can access this coordinate is the Hair node.

A couple years ago I figured out a way to extract the value of the "W" coordinate and use it to make rainbow hair.

http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2807241


Renderosity forum reply notifications do not function AT ALL.If you need me to answer something, ask elsewhere.

I used to have a Rendered-in-Poser image in my signature. Renderosity took it away. 

Cool. <<<<< (sarcasm)


  Miss Nancy () ( posted at 12:16AM Tue, 31 July 2012  · @3964959

misty, you see he's using a colour ramp there.  would suggest losing the user-defined hsv node until it has been further demonstrated in this regard.



  MistyLaraPrincess () ( posted at 9:33AM Tue, 31 July 2012 · edited on 9:46AM Tue, 31 July 2012 · @3965079

the 3rd texture dimension !

woww, thanks!



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