Re: Polyline versus LineTo
MBB wrote:
I'm having a problem understanding why my code which draws lines with
many vertices is faster when I make 65534 calls to LineTo than when I
make one call to Polyline and supply an array of 65534 POINT structs to
it. The data are the same in each case I just loop thorough the array of
POINT structs for the LineTo call.
Every thing I have read indicates that Polyline should be no slower but
it is by a factor of about 2.
I am on a W2000 machine with a ViewSonic 2007. My video card is NVIDIA
GeForce2 MX-100/200. AGP 4x bus type.
Should I bother testing on newer hardware or a newer OS?
The more, the merrier.
I am developing in VS6 so I am wondering if things like DirectDraw are
available to me. HELP!
[..]
To understand where delays happen you need to use a profiler. Without
it you (and we) are playing a guessing game.
If you care to provide a short example with all the timing code, etc.,
there are probably folks here who could test your code for you on
different OSes/hardware...
Also check with 'comp.graphics.algorithms', maybe somebody there knows
something about MS Windows GDI API specifics. Also, GIYF.
V
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