Re: Intersecting Polygons

From: Douglas Marquardt (no_spam_at_dummy.com)
Date: 09/14/04 

Date: Tue, 14 Sep 2004 11:14:14 -0600

Hi Matt:

Sorry, don't use polygons much so I can't help you out there.

Doug.

"YYZ" <notapplicable> wrote in message news:u7aj5xnmEHA.3172@TK2MSFTNGP15.phx.gbl...
> Thanks Douglas -- that gets me through about 99% of my situations. I actually
> mistyped, though. I should have asked about the intersection of 2 POLYGONS, not
> just rectangles. The polygons can have 3 or more points/sides, up to infinite.
> In reality they probably won't have more than 20 points or so, but...
>
> Any idea about that one? BTW, thanks for pointing me to that Platform SDK help
> section -- I haven't seen it before, and it's better than the APIViewer for some
> things.
>
> Thanks.
>
> Matt
>
>
> "Douglas Marquardt" <no_spam@dummy.com> wrote in message
> news:ukALymnmEHA.1120@TK2MSFTNGP14.phx.gbl...
> > Hi Matt:
> >
> > From the VB6 Doc
> > Public Declare Function IntersectRect Lib "user32" Alias "IntersectRect"
> > (lpDestRect As RECT, lpSrc1Rect As RECT, lpSrc2Rect As RECT) As Long
> >
> > The IntersectRect function calculates the intersection of two source
> rectangles and
> > places the coordinates of the intersection rectangle into the destination
> rectangle.
> > If the source rectangles do not intersect, an empty rectangle (in which all
> coordinates are set to zero) is placed into the
> > destination rectangle.
> >
> > Doug.
> >
> > "YYZ" <notapplicable> wrote in message
> news:%23zsdejnmEHA.3428@TK2MSFTNGP11.phx.gbl...
> > > Off topic a bit, I guess...
> > >
> > > Does anyone know a mathematical formula for figuring out of 2 rectangles
> > > intersect?
> > >
> > > Matt
> > >
> > >
> >
> >
>
>

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