Re: Intersecting Polygons

From: YYZ (notapplicable)
Date: 09/14/04 

Date: Tue, 14 Sep 2004 10:01:25 -0700

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
> >
> >
>
>

Relevant Pages

  • Re: Testing Intersection with A Rectangle(2D) w/No Area
    ... > How do I test a rectangle for intersection with another rectangle which has ... > false for a degenerate rect which is equivalent to a line. ... Boeing Associate Technical Fellow ...
    (comp.lang.java.gui)
  • Re: Polymorphism sucks [Was: Paradigms which way to go?]
    ... > intersection when I can return a rectangle? ... Well, depending on the requirements, it might be simpler - for example, if ... wether and how to use an implementation technique like OO. ...
    (comp.object)
  • Re: Calculating the area of intersection of ellipse and a rectangle
    ... Calculating the area of intersection of an ellipse and a rectangle ... may I ask you if anybody knows about an efficient method or may be ...
    (comp.soft-sys.matlab)
  • Re: Intersecting Polygons
    ... don't use polygons much so I can't help you out there. ... I should have asked about the intersection of 2 POLYGONS, ... >> places the coordinates of the intersection rectangle into the destination ... >> Doug. ...
    (microsoft.public.vb.general.discussion)
  • Re: Java library for geometric?
    ... >>polygons for intersection. ... >>can't test a Polygon for intersection with another Polygon, ... >>check for intersection with a Rectangle. ...
    (comp.lang.java.programmer)