[Geometry] Add methods getBarycentricCoordinates and isPointInTriangle in Triangle class

[epernod]

Add method:

• pointBaryCoefs to Compute the barycentric coefficients of input point in the current Triangle
• method isPointInTriangle using the barycentric coefficients
• Add unit tests with positive and negative cases

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• it builds with SUCCESS for all platforms on the CI.
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• it does not generate new unit test failures.
• it does not generate new scene test failures.
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[alxbilger]

[ci-build][with-all-tests]

[hugtalbot]

Do you know why the function is not removed in the other code?
We maybe should create an issue not to forget to clean the GeometryAlgorithms

[epernod]

Do you know why the function is not removed in the other code? We maybe should create an issue not to forget to clean the GeometryAlgorithms

For the moment, the old method is not removed because it was not well handling all cases. Therefor the new method has a slightly different (better) behavior. Switching to the new one might cause some scene regressions to fail. I prefer to do that in a next PR.

For the TriangleSetGeometryAlgorithm clean, you can create an issue if you want but it is already a wip on my dev branch: See https://github.com/epernod/sofa/pull/10/files#diff-e1443ad8032ebc3d01202980477d0fd24cf3c4db16a90452dd51f780bffe2e3f
I will push the changes progressively

[fredroy]

pointBaryCoefs, the name looks... not really informative and uses abbreviations.
Maybe something like getBarycentricCoefficients() or even getBarycentricCoordinates() which seems more in par with the maths

[epernod]

Done and add more description on the method (based from wikipedia)