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Before any attempt to mesh the shape, it is recommended to optimize the sketch shape regarding its minimal principal curvatures (Eq. 2). Using the curvature-analysis built-in function in Rhino it is easy to identify and smooth areas that are initially too curved (Fig. 11).

(2)

Different sketches are compared according to this criterion to smooth areas where curvature is excessive.

Sketch n°1

Sketch n°2

Sketch n°3

Fig. 11 Geometric curvature minimisation in three steps. Rmin ϵ [blue = 3,00m; red = 10,00m]