(This is my 200th post! =)
toGC n = (n `shiftR` 1) `xor` n
base2 n = showIntAtBase 2 ("01" !!) n ""
printGC w n = do
let n' = toGC n
printf "%0*s %0*s\n" w (base2 n) w (base2 n')
main = forM_ [0..31 :: Int] $ printGC (5 :: Int)
I indented the code by four spaces, as I thought you were using Markdown, but it looked terrible. Did you fix it up? If so, thanks!
Also, I like the seasonal colours in the diagram. :-)
Yep, I fixed it up, no worries. =) You can just surround code with <pre><code> … </code></pre>.
The one on the left is just counting in binary. Is the one on the right a Gray code?
Right you are!
I made something pretty using Gray code:
Cool! Can you explain how you made it?
For each pixel, put its x,y coordinates in Gray code; deal out the bits to the color-channels, in one of a large number of possible ways; convert the result from Gray code. Gray code is not essential to the concept, but makes it prettier.
Thus for example the (Gray) coordinates’ bits might be
X = G7 B7 R6 G5 B5 R4 G3 B3 R2 G1 B1 R0
Y = R7 G6 B6 R5 G4 B4 R3 G2 B2 R1 G0 B0
or in other words the (Gray) color bits are
R = Y11 X9 Y8 X6 Y5 X3 Y2 X0
G = X11 Y10 X8 Y7 X5 Y4 X2 Y1
B = X10 Y9 X7 Y6 X4 Y3 X1 Y0
(I forgot that I had already posted bigger versions on G+.)
Ah, I see. Neat!
Comments are closed.
Enter your email address to follow this blog and receive notifications of new posts by email.
Join 230 other followers
Brent's blogging goal
Get every new post delivered to your Inbox.