These documents are refreshed/augmented from their ancestors.
Disambiguate: Polyline CAD style has > 1 subspaces.

Spline Polyline Hermite [SubSpaces MOST Used].sm (61 КиБ) скачан 149 раз(а).
Spline Polyline [Hermite vs bSpline] Copy.sm (98 КиБ) скачан 150 раз(а).

Wrote

These documents are refreshed/augmented from their ancestors.
Disambiguate: Polyline CAD style has

This MOST Used has been refreshed, slightly augmented, doctored.

Spline Polyline Hermite [SubSpaces MOST Used].sm (105 КиБ) скачан 148 раз(а).

Wrote

This MOST Used has been refreshed, slightly augmented, doctored.

... closed shapes have interest in Engineering: added

Spline Polyline Hermite [SubSpaces MOST Used].sm (337 КиБ) скачан 144 раз(а).

Wrote

... closed shapes have interest in Engineering: added

This regular heptagon in separate document.
If added on the original, there is conflict.
Couldn't doctor, so: as is demo ... Jean

Spline Polyline Hermite [SubSpaces MOST Used Fourier Polygon].sm (79 КиБ) скачан 149 раз(а).