[GIBOK] function required to manage slicing of bone and return Areas about msk-staple HOT 4 CLOSED

I am using PlanPolygonCentroid3D.m but sometimes the computed area is negative.
Is this meant to be like this? @renaultJB

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Requires double checking @modenaxe

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I have modified the TriPlanIntersect.m function and now in the Curves structure you have access to the area of the 2D polygon described by the curves points : Curves(i).Area is the area of the 2D polygon Curves(i).Pts embedded in 3D space . The calculation is performed with polyarea once the curve is expressed in its own coordinate system. This area doesn't account for potential nested curves that describes hole, so the computed area Curves(i).Area is always the area of the section described by the curves(i) regardless of the fact that there are holes or not in this cross section.

The "TotArea" output account for nested curves and holes when computing the area of the cross section.

So I guess the PlanPolygonCentroid3D.m function is not working properly for area calculation and should be modified to perform the computation of area with polyarea. But it might not be useful anymore as areas can be computed with TriPlanIntersect.m .

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updated code and implemented a slicing function.

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