On Thu, Nov 6, 2014 at 3:07 PM, Menelaos Karavelas <menelaos.karavelas@gmail.com> wrote:
Dear Will,
I tried your polygons and the intersection seems to work.
Please checkout the attached program, and let us know if you get a similar output. The output that I get is:
MULTIPOLYGON(((75 150,250 150,250 75,75 75,75 150)))
Best,
- m.
On 06/11/2014 10:44 μμ, Will Lucas wrote:
Hi all,
I have a question regarding the intersection of ring concepts using Boost.Geometry. I currently have two overlapping rectangles defined by the following WKTs:
POLYGON((75 75,75 175,275 175,275 75,75 75))POLYGON((50 50,50 150,250 150,250 50,50 50))
When I perform the intersection of these rectangles, I get the intersection points:
POLYGON((75 150,250 75))
The intersection points do not allow me to compute the area correctly after the intersection. Is there way to get a fully valid ring/polygon out of intersection, so that the area will be equal to the overlapping region?
Thanks!Will
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Menelaos,
Thanks for the quick response! I have tested your code, and it correctly outputs
MULTIPOLYGON(((75 150,250 150,250 75,75 75,75 150)))
I had to comment out the is_valid calls as I'm running the Ubuntu package (boost 1.54.0), which doesn't contain that helper method.
I'm guess the problem may be my re-mapping of the OpenCV data-types. Here is what I currently am working with
Do I need to define a polygon wrapper for the custom Contour type I have?
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