dotnet drawing api: Getting a path from the intersection of two regions -- dotnet drawing api

You're in the

dotnet drawing api

group:

Getting a path from the intersection of two regions

Valerie Hough
10/27/2006 1:48:32 PM

dotnet drawing api:

Hi,
I would like to be able to determine the outline of the intersection of two
polygons, even in the case where more than one polygon might result.

My strategy was to create a graphicsPath object for each polygon, create a
region from each of those, then apply Region.Intersect().

Once I have done that, is it possible to find out the outline(s) of this
created intersection?

In particular, if I take two polygons whose intersection produces multiple
polygonal intersections, I would like to be able to have the result set of
points for each resultant polygon.

Thanks in advance.
Chris Hough

Re: Getting a path from the intersection of two regions

Valerie Hough
10/27/2006 3:27:08 PM

Thanks for your reply - I had sort of reached that conclusion but was hoping
it was not true. The URL you suggested looks promising.

Re: Getting a path from the intersection of two regions

Joergen Bech <jbech<NOSPAM> NO[at]SPAM
10/27/2006 9:12:55 PM

Region + GraphicsPath seem to be one-way streets only.
All the interesting stuff takes place in GDI+, below the
managed portion. GetRegionData and GetRegionScans
are not what you are looking for.

Have you looked at something like this library:
http://www.cs.man.ac.uk/~toby/alan/software/

Full source code and .Net wrappers available.
Perhaps you can get a bit closer to the required bits
and pieces that way?

/JB

On Fri, 27 Oct 2006 13:48:32 -0400, "Valerie Hough"
[quoted text, click to view]

Got something to say? Click here to post a reply to this thread.

Don't see what you're looking for? Try a search.

View other messages in the dotnet drawing api group.

View Other Months
June 2003
July 2003
August 2003
September 2003
October 2003
November 2003
December 2003
January 2004
February 2004
March 2004
April 2004
May 2004
June 2004
July 2004
August 2004
September 2004
October 2004
November 2004
December 2004
January 2005
February 2005
March 2005
April 2005
May 2005
June 2005
July 2005
August 2005
September 2005
October 2005
November 2005
December 2005
January 2006
February 2006
March 2006
April 2006
May 2006
June 2006
July 2006
August 2006
September 2006
October 2006
November 2006
December 2006
January 2007
February 2007
March 2007
April 2007
May 2007
June 2007
July 2007
August 2007
September 2007
October 2007
November 2007
December 2007
January 2008
February 2008
March 2008
April 2008
May 2008
June 2008

home · blog · groups

Questions? Comments? Contact the dn