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Joodas
Registered: Oct 2011
Posts: 8 |
Joe's 136 colors technique
Hi all,
I am looking for information about Joe's 136 colors technique. Any links will be appreciated.
Thank you for help |
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Copyfault
Registered: Dec 2001
Posts: 466 |
Quote: Instead of scrolling in an even number (2/4/6/whatever) of pixels per frame, you can also scroll in an odd number of pixels, if you have 2 sets of bitmap where you reverse the mixing colors in the 2nd bitmap.
That way the colors stay the same and doesn't depend on the speed that you're scrolling with. -> idea (C) WVL ;)
If the screen layout allows it you could even display all "background colours" using sprites -> Voila, scrolling @ 1 rasline/frame without flickering :)) |
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jailbird
Registered: Dec 2001
Posts: 1576 |
You guys are overcomplicating a very simple matter. No one except Joe is thinking like this about pixelling :) |
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JackAsser
Registered: Jun 2002
Posts: 1989 |
Quote: You guys are overcomplicating a very simple matter. No one except Joe is thinking like this about pixelling :)
And nobody except you (and obviously I) are reading two year old threads... ;) |
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Pex Mahoney Tufvesson
Registered: Sep 2003
Posts: 50 |
JackAsser: ...to put old threads into great use, I have an idea:
Could we use the vertical hires stripes (alternating white and black pixels) running on a PAL output to determine the startup phase relationship of the VIC-II clocks?
Then we would have _the_ solution of finding out when a C64 is powered on in a VSP-safe state. :-D
---
Have a noise night!
http://mahoney.c64.org |
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chatGPZ
Registered: Dec 2001
Posts: 11118 |
so now you ONLY have to find a way to determine the looks of those stripes by software =) |
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soci
Registered: Sep 2003
Posts: 473 |
Coding that is easy:
01234567890ABCDEF
#################
Type in the number/letter where
it's the most green.
But it does not work very well when using a proper TV set with s-video, as there's hardly any stripes to see. |
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chatGPZ
Registered: Dec 2001
Posts: 11118 |
thats not quite a software solution when it requires the user to enter the result :) |
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Digger
Registered: Mar 2005
Posts: 421 |
Finally, I've created a small tool (alpha) to explore all these 136 colours:
https://dl.dropboxusercontent.com/u/254436606/c64/136-colors/in..
Feedback welcome :) |
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ilesj
Registered: Jun 2012
Posts: 27 |
That's cool. But to what are the luminance values based on? Looking at the 'base' colors (distance 0), the colors that are luminance pairs have different values in this chart. For example brown and blue. |
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Digger
Registered: Mar 2005
Posts: 421 |
@ilesj: You're right the luminance was derived from the HTML hex colours thus not identical with C64 color luminances.
I've replaced the values as measured by Pepto (http://www.pepto.de/projects/colorvic/)
Thanks for feedback! |
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