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Lazy · **An odd question... -** 14-08-2005

A stupid late-night idea has me trying to create a dot matrix display using '.' and 'o' characters...
I have it set up so that there are 160 bits/dots, 32 bits wide by 5 bits high.
So, each line is made up of 4 bytes ( ie. byte 2 is 16,0 to 23, 0 ).

I just can't figure out how to convert an X,Y coordinate ( say, 5,2 ) to an individual byte and bit.
There must be some kind of math to do it but I can't figure it out - unless more coffee will help.

I could post the code I have now if needed, but its not commented and only rotates the bits in every byte of the first line.
Btw, is there a standard C/C++ way to rotate bits?
I can't remember off hand so I used some x86 asm to do the rotation.

	(#1)
Lazy Member Status: Offline Posts: 236 Join Date: Jan 2004 Location: Toronto, Ontario, Canada	An odd question... - 14-08-2005 A stupid late-night idea has me trying to create a dot matrix display using '.' and 'o' characters... I have it set up so that there are 160 bits/dots, 32 bits wide by 5 bits high. So, each line is made up of 4 bytes ( ie. byte 2 is 16,0 to 23, 0 ). I just can't figure out how to convert an X,Y coordinate ( say, 5,2 ) to an individual byte and bit. There must be some kind of math to do it but I can't figure it out - unless more coffee will help. I could post the code I have now if needed, but its not commented and only rotates the bits in every byte of the first line. Btw, is there a standard C/C++ way to rotate bits? I can't remember off hand so I used some x86 asm to do the rotation.