Thx, I didn't know that object. But the scale you have is backwards.
Reverse the values, then the wavelength and the RGB values should match
better (see wavelengths/colors listed in my first post). I also like the
little part about luminosity that the original author of the code I used
threw in, to make infrared and ultraviolet fade out as they leave the
range of human vision.
best!
D.
Jack wrote:
It doesn't work with [hsv2rgb] ?
Have a look to this patch.
++
Jack
Le 13 avr. 09 à 00:12, Derek Holzer a écrit :
Done! Results are attached, with GEM example help patch. Could also be
useful for controlling PWM dimmer for RGB lights or LEDs.
best!
D.
Derek Holzer wrote:
I also found this:
http://www.mail-archive.com/use-revolut...@lists.runrev.com/msg17390.html
Which seems much more useful for the task at hand. But not being much
pf a C programmer, it could take me some time converting it into a Pd
patch. I'll report back...
D.
Claude Heiland-Allen wrote:
Derek Holzer wrote:
Hey gang,
before I go reinventing somebody else's wheel... has anybody
written something that takes a (sound) frequency in Hz or MIDI note
and outputs the transposed color in RGB values? Along these lines:
F#44 = 737 nm(Infrared)
G 44 = 696 nm(Red)
G#44 = 657 nm(Red)
A 44 = 620 nm(Red-Orange)
A#44 = 585 nm(Yellow)
B 44 = 552 nm(Green)
C 45 = 521 nm(Green)
C#45 = 492 nm(Green-Blue)
D 45 = 464 nm(Blue)
D#45 = 438 nm(Violet)
E 45 = 414 nm(Violet)
F 45 = 390 nm(Ultraviolet)
Or even something that takes the light wavelength in nanometers and
gives separate RGB values? I'm working on a simple color organ for
a friend this week.
http://www.fourmilab.ch/documents/specrend/
Have fun..
--
::: derek holzer ::: http://blog.myspace.com/macumbista :::
http://www.vimeo.com/macumbista :::
---Oblique Strategy # 131:
"Question the heroic approach"
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#X obj 147 80 moses 440;
#X obj 198 118 moses 490;
#X obj 249 149 moses 510;
#X obj 300 188 moses 580;
#X obj 351 219 moses 645;
#X obj 147 188 expr -($f1-440)/(440-380);
#X msg 166 207 0;
#X msg 186 227 1;
#X obj 147 157 t f b b;
#X obj 96 72 bang;
#X msg 96 118 0;
#X msg 126 118 0;
#X msg 156 118 0;
#X msg 198 299 0;
#X msg 237 299 1;
#X obj 217 276 expr ($f1-440)/(490-440);
#X obj 198 250 t b f b;
#X msg 249 359 0;
#X msg 268 379 1;
#X obj 249 330 t b b f;
#X obj 288 358 expr -($f1-510)/(510-490);
#X obj 300 379 t f b b;
#X msg 319 429 1;
#X msg 339 449 0;
#X obj 300 410 expr ($f1-510)/(580-510);
#X obj 351 476 t b f b;
#X msg 351 525 1;
#X msg 390 525 0;
#X obj 370 502 expr -($f1-645)/(645-580);
#X obj 402 248 moses 780;
#X obj 402 549 bang;
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#X obj 499 169 moses 380;
#X obj 499 192 bang;
#X msg 499 217 0;
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#X obj 550 191 moses 419;
#X obj 601 219 moses 700;
#X obj 550 281 expr 0.3+0.7*($f1-380)/(420-380);
#X obj 652 331 expr 0.3+0.7*(780-$f1)/(780-700);
#X obj 601 306 bang;
#X msg 601 331 1;
#X obj 96 25 t f f;
#X obj 96 3 inlet wavelength in nm;
#X text 829 21 comment;
#X text 455 662 Adapted from Monte Goulding's WavelengthToRGB function
for libcolor.
http://www.mail-archive.com/use-revolut...@lists.runrev.com/msg17390.html
;
#X text 543 751 de...@umatic.nl;
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#X obj 67 89 outlet;
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#X msg 118 81 reset;
#X obj 118 113 outlet;
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#X connect 0 0 3 0;
#X connect 1 0 2 0;
#X connect 3 1 1 0;
#X restore 289 80 pd Gem.init;
#X connect 2 0 3 0;
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#X text 190 93 Input range = 380-780 (ultraviolet to infrared
wavelengths)
;
#X text 464 398 de...@umatic.nl;
#X text 343 245 R;
#X text 343 265 G;
#X text 343 288 B;
#X text 343 308 A;
#X text 179 329 Convert wavelength in nanometers to colors in RGB.
Let the intensity fall off near the limits of vision \, as represented
by A (Alpha).;
#X connect 0 0 1 0;
#X connect 1 0 0 0;
#X connect 3 0 5 0;
#X connect 5 0 8 0;
#X connect 6 0 7 0;
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#X connect 8 0 4 0;
#X connect 12 0 14 0;
#X connect 14 0 5 1;
#X connect 14 0 9 0;
#X connect 14 1 5 2;
#X connect 14 1 10 0;
#X connect 14 2 5 3;
#X connect 14 2 11 0;
#X connect 14 3 5 4;
#X connect 14 3 13 0;
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--
::: derek holzer ::: http://blog.myspace.com/macumbista :::
http://www.vimeo.com/macumbista :::
---Oblique Strategy # 196:
"What else is this like?"
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