[A83] Re: BASIC
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[A83] Re: BASIC
> Van: Thomas Lutz <tlutz@stevens-tech.edu>
>
> -----Original Message-----
> [mailto:assembly-83-bounce@lists.ticalc.org] On Behalf Of Henk Poley
>
> >That's called Floating Point. Every time you plot a pixel it needs to
> >calculate where it should be on the screen... And indeed, Ti should
> >really have implemented some char/int/double support...
>
> Do you know how this technique works?? I've tried to make a graph cursor
> routine but it is sometimes 1 pixel off...
Uh, I guess you ask how Ti rounds the numbers in Ti-BASIC pixelroutines?
Then you need to know that there are 2 sorts of pixelroutines in BASIC, one
plots a pixel on x,y on the LCD (bottom-left pixel is at (0,62), the other
one first calculates the coords via Xmin/Xmax and Ymin/Ymax (bottom-left
pixel is at 0,0). Just do something like this to create a nice window to
work with:
:0->Ymin
:62->Ymax
:0->Xmin
:94->Xmax
It's all a matter of RTFM...
Henk Poley <><