# Anisotropie in GeomPlate_BuildPlateSurface

What does it mean? What is it good for?

Thanks and bye, Stefan

Stefan,

After a check in the documentation, the "anisotropie" parameter of GeomPlate_BuildPlateSurface means : "If the Boolean Anisotropie is true, the algorithm's performance is better in cases where the ratio of the length U and the length V indicate a great difference between the two. In other words, when the surface is, for example, extremly long".

Regards,

Arnaud.

> After a check in the documentation, the

I couldn't find information about the "Aniostropie"-parameter in the "documentation". I c checked the online documentation and that's all I got: http://www.opencascade.org/doc/ModelingAlgorithms/cursur.htm#P_35_15

bye, Stefan

Hello Stefan,

Following the previous mail of Arnaud, I would say that Anisotropie, in the algorithm, is the physical capacity of the surface to be bent along U or V. In GeomPlate, we assign 1 to the Anisotropy. Tests showed that 1 was the best value in spite of the real computation result which is (Length of the Surface along V / Length of the Surface along U). If you want, you can insert it in GeomPlate_BuilsPlateSurface in ComputeAnisotropie() and test it.

About the next step, approximation, if the result is insufficient, try to reduce the tolerance.

Be carefull about your constraints (G1 and G0), they don't have to be opposed.

Dear Stefan,

A pleasure.

> I couldn't find information about the
> "Aniostropie"-parameter in the
> "documentation". I c checked the
> online documentation and that's all I got:

It is true that I should have specified where, in the documentation, you could find the answer.

GeomPlate_BuildPlateSurface is the base computation tool of the BrepOffsetAPI_MakeFilling class. In the BRepOffsetAPI_MakeFilling documentation, more details are given on the parameters (which are almost the same than GeomPlate_BuildPlateSurface). On the on-line documentation, check at:

Regards,

Arnaud.

I know it's an old thread, but for the sake of completeness

The parameter Anisotropie has no effect, it is used only at one point.