This strongly reduces the tool path generation time,
because a relative large number of triangles (15 to 25%)
are thrown away for further calculation. This time
reduction is even stronger, because the time needed to
calculate a gouge free position based on an edge or a
face is quite longer compared to the time needed for an
angle calculation based on a vertex. This two steps
algorithm is certainly innovative compared to other
algorithms p'], where the calculation of a gouge free
inclination angle is done on a triangle per triangle basis
(vertices-edges-face).