Click here to Skip to main content
12,074,485 members (62,802 online)
Rate this:
 
Please Sign up or sign in to vote.
See more: C# graphics geometry
The problem is the following.

I have 2 arrays of points. In a graphics I need to paint the polygon (array 1) without painting the inside (array 2), As this image.

http://wiki.openstreetmap.org/w/images/thumb/b/b4/Multipolygon_Illustration_1.svg/400px-Multipolygon_Illustration_1.svg.png[^]

Any idea how to do this in C
#?
Posted 30-Jan-13 1:03am
gilvani3.4K
Edited 30-Jan-13 1:04am
v2

1 solution

Rate this: bad
 
good
Please Sign up or sign in to vote.

Solution 1

hello, I found the solution.

In graphics I changed the CompositingMode that determines when to paint a polygon on the other it is overwritten and not superimposed.


Bitmap img = new Bitmap( 200, 200 );
Graphics imgGraph = Graphics.FromImage( img );
imgGraph.CompositingMode = System.Drawing.Drawing2D.CompositingMode.SourceCopy;
imgGraph.FillPolygon( Brushes.Red, Points1 );
imgGraph.FillPolygon( Brushes.Transparent, Points2 );




That's all folks!
  Permalink  
v3

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

  Print Answers RSS
Top Experts
Last 24hrsThis month


Advertise | Privacy | Mobile
Web03 | 2.8.160208.1 | Last Updated 30 Jan 2013
Copyright © CodeProject, 1999-2016
All Rights Reserved. Terms of Service
Layout: fixed | fluid

CodeProject, 503-250 Ferrand Drive Toronto Ontario, M3C 3G8 Canada +1 416-849-8900 x 100