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OrbWorks Community Forum • View topic - UP and DOWN are reversed!

UP and DOWN are reversed!

Discuss PocketC for Palm OS (including Desktop Edition)

Postby rayburn on Sat Feb 21, 2004 2:41 pm

hello,
I dont know if this is normal....or if it is a bug...

I am doing a program that moves a pixel across the screen (useless huh?).
this is how it works: if I press UP, int y will go up by 1, if I press DOWN, int y will go down by 1.

BUT when I press UP, y goes down by 1 and when I press DOWN, y goes up by 1!

Strange eh?
rayburn
 
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Postby dewey on Sat Feb 21, 2004 5:25 pm

On the Palm OS (and most computer systems) the origin of the screen (0,0) is at the upper left. So, to make the dot go up, decrease y.
dewey
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