2015-05-06 2:20 GMT+10:00 Julien Derr <[email protected]>: > Hi again, I am back again with the same error message! > > but this time I checked that I didn't have twice the same points. He re is > the problem: > > What happen is that I have 3 points perfectly aligned, and it seems gmsh is > making a flat triangle with them.
Hello. I wouldn't have thought that collinearity would present a problem, necessarily, depending on how the points are used to define surfaces. I wasn't sure that I'd come across this before so created a simple degenerate quadrilateral, as attached; Gmsh & FreeFem++ seemed happy enough. Or do you mean that the three points are coincident rather than merely collinear? Do you have an exemplary .geo file that you could share? I agree that having to reduce the characteristic length to avoid the problem would be inconvenient and undesirable, but I'm hopeful that there's another way.
flat.geo
Description: Binary data
flat.edp
Description: Binary data
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