Find the common edges shared by two patches

liu · October 20, 2008, 15:01

Hi, All

In my code, I want to find the common edges which are shared by two patches, say patch1 and patch 2.

I now I have to loop around all the edges of the patches to compare. But I am too lazy. Did anybody already do this? Or maybe someone could point me to somewhere and save me a lot time?

deepsterblue · October 20, 2008, 21:48

I can take a guess -

Every primitivePatch edges() call provides an edge addressing list that spans between 0 and nInternalEdges, and from then on, all edges are patch boundary edges. Comparing boundary edges for patch1 and patch2 should be a much quicker way of obtaining common edges, rather than looping through all of them.

Hope this helps.

October 20, 2008, 15:01	Hi, All In my code, I want	#1
liu Senior Member Xiaofeng Liu Join Date: Mar 2009 Location: State College, PA, USA Posts: 118 Rep Power: 17	Hi, All In my code, I want to find the common edges which are shared by two patches, say patch1 and patch 2. I now I have to loop around all the edges of the patches to compare. But I am too lazy. Did anybody already do this? Or maybe someone could point me to somewhere and save me a lot time? __________________ Xiaofeng Liu, Ph.D., P.E., Assistant Professor Department of Civil and Environmental Engineering Penn State University 223B Sackett Building University Park, PA 16802 Web: http://water.engr.psu.edu/liu/

October 20, 2008, 21:48	I can take a guess - Every	#2
deepsterblue Senior Member Sandeep Menon Join Date: Mar 2009 Location: Amherst, MA Posts: 403 Rep Power: 25	I can take a guess - Every primitivePatch edges() call provides an edge addressing list that spans between 0 and nInternalEdges, and from then on, all edges are patch boundary edges. Comparing boundary edges for patch1 and patch2 should be a much quicker way of obtaining common edges, rather than looping through all of them. Hope this helps. Pepanson likes this. __________________ Sandeep Menon University of Massachusetts Amherst https://github.com/smenon

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