You're absolutely right. For once (:-) I did
not know what I way saying.
---Steve Lamont <spl@szechuan.ucsd.edu> wrote:
>
> # To subscribers of the xforms list from spl@szechuan.ucsd.edu
(Steve Lamont) :
>
> TC sez:
> > I think the problem might not be the limitation on the number of
> > points. Rather, the limit is on the xy values. If I remember
> > correctly (I am at siggraph, and can't look it up), the points are
> > represented by unsigned shorts. If your plots are somewhat linearly
> > scaled, by point number 64k, x or y will wrap around and xforms
> > clips these points.
>
> I'm not sure why that would make a difference.
>
> I presume you're referring to the XPoint structure
>
> typedef struct {
> short x, y;
> } XPoint;
>
> which, of course, is limited to the precision of an signed short
> (which should be -32768 to 32767). As far as I can see, this
> basically says that your display may be no larger than 32767 x 32767
> pixels since XPoint directly maps into a frame buffer pixel address as
> far as I am able to tell.
>
> The number of *distinct* points therefore will be limited by the pixel
> resolution.
>
> spl
>
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