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> According to my father, who has red-green color blindness, red and green
> both appear as different shades of the same rather bland color. Colors
> that contain significant amounts of red or green are also affected, so for
> example peanut butter is "green", and light pink and light grey look about
> the same.
I'm not sure if this is a true fact, but I heard that only the Red
information was wrong by daltonism. And the brain interprets the color
in some way that makes any color containing red to be blended somehow...
Even when I see a pure Blue thing, I can't say for sure that it's blue,
it might contain some red pigments that I don't perceive...
Xilo
--
Dedicated to audio/visual and interactive artwork.
Author of The Primary Colors of CSound:
http://www.geocities.com/simonlemieux/PCCS/index.html
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> Don't use such an obtuse color choice scheme.
>
> Q: What is your image **about**?
Well, you see, i'm used to programming with OpenGL (interactive 3D, like
3D games, etc..) and I often program abstract screensavers and when I
have to chose the colors I simply rely on the 3 RGB...
But now that I'm doing a project for povray, I will probably eventually
change the way I use colors...
Actually, I might even use different kind of metals like bronze, silver,
gold, etc... I'm not sure, I'm just stuck with the color choice and if
I get a simple good color choice, I'll use it, then when the image is
done, I'll change the colors to better looking ones!
Xilo
--
Dedicated to audio/visual and interactive artwork.
Author of The Primary Colors of CSound:
http://www.geocities.com/simonlemieux/PCCS/index.html
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Xilo Musimene wrote:
>> In the rainbow you have red, orange, yellow, green, blue and purple.
>
>
> Hmmm, isn't there 7 colors in the rainbow?
Which one do you miss? (Actually, there is infinitely many colors in the
rainbow :)
/Ib
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> Which one do you miss? (Actually, there is infinitely many colors in the
> rainbow :)
Well, i don't know, but since I'm a kid I've been told there were 7
colors in a rainbow, though I know for having done some optical physics
at school that there is the whole visible spectrum.
But I was wondering what were the 7 colors I've been told when I was a
kid...
Xilo
--
Dedicated to audio/visual and interactive artwork.
Author of The Primary Colors of CSound:
http://www.geocities.com/simonlemieux/PCCS/index.html
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On Sun, 20 Apr 2003 04:04:08 +0500, Xilo Musimene <xil### [at] hotpop com> wrote:
>But I was wondering what were the 7 colors I've been told when I was a
>kid...
>
Roy G Biv
Red, Orange, Yellow, Green, Blue, Indigo and Violet.
Personally I only ever see a maximum of six in nature, the Blue, Indigo and
Violet seem to be so close in hue they blend into two colours. In a darkened lab
I'm sure I saw the seven but I wanted to, that may have helped.
Regards
Stephen
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Xilo Musimene <xil### [at] hotpopcom> wrote in news:3EA### [at] hotpopcom
[...]
main "colors" in common interpretation, colud be :
gray- rgb 1 rgb 0 rgb .5
RGB- rgb x rgb y rgb z
CMY- rgb x+y rgb y+z rgb z+x
and maybe also brown collor about ~ <1,.7,.3> and orange ~ <1,.7,.1>
--
#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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Among other things, Xilo Musimene wrote:
>> In case you don't know, it was John Dalton, the father of the Atomic
>> Theory, who gave name to daltonism, he was colour blind and studied that
>> condition.
>
> I didn't... I wonder if working in an atomic lab for long can render
> someone color blind! hehe
I was talking of XVIII century, Dalton postulated elements were made out of
atoms which combined to form compounds, there were no neutrons or gamma
rays back then ;)
--
light_source{9+9*x,1}camera{orthographic look_at(1-y)/4angle 30location
9/4-z*4}light_source{-9*z,1}union{box{.9-z.1+x clipped_by{plane{2+y-4*x
0}}}box{z-y-.1.1+z}box{-.1.1+x}box{.1z-.1}pigment{rgb<.8.2,1>}}//Jellby
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Among other things, Ib Rasmussen wrote:
> Most people, who don't know about the RGB colour space, regard yellow as
> a primary colour along with red, green and blue.
Actually, when I was a child I was taught basic colours were red, blue and
yellow. Secondary colours would be green (blue + yellow), purple (red +
blue) and orange (yellow + red), cyan looks like a light blue.
I know this doesn't comply with colour theory, but it works when using real
paints (and when you're 6) ;)
--
light_source{9+9*x,1}camera{orthographic look_at(1-y)/4angle 30location
9/4-z*4}light_source{-9*z,1}union{box{.9-z.1+x clipped_by{plane{2+y-4*x
0}}}box{z-y-.1.1+z}box{-.1.1+x}box{.1z-.1}pigment{rgb<.8.2,1>}}//Jellby
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In article <3EA### [at] hotpopcom>,
Xilo Musimene <xil### [at] hotpopcom> wrote:
> > In the rainbow you have red, orange, yellow, green, blue and purple.
>
> Hmmm, isn't there 7 colors in the rainbow?
Uh...the rainbow contains the entire spectrum. It has every color
possible with a single wavelength. It would look quite strange with 7
colors.
--
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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In article <3ea2c000@news.povray.org>, Jellby <jel### [at] M-yahoocom>
wrote:
> Actually, when I was a child I was taught basic colours were red, blue and
> yellow. Secondary colours would be green (blue + yellow), purple (red +
> blue) and orange (yellow + red), cyan looks like a light blue.
>
> I know this doesn't comply with colour theory, but it works when using real
> paints (and when you're 6) ;)
That's subtractive color, or CMY: "blue" == cyan, "red" == magenta. The
crayons are close enough you can use the same rules and get something
close to the desired result, though proportions are different.
--
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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