While talking "Importing Images" in the discussion category,
I noticed that importing my logo was all scarp because the
import default is overzoomed. Very nice as my avatar.

This work sheet is interesting in two ways:

1. Start practice your skill sketching XY, scale/rotate.
Think more: each XY vector sketch can be considered a "layer",
each layer independently scalable/rotatable. As is, the quick
plot will be in default colors. If you want any particular
layer of point size and particular color [in fact any web color],
you will have to construct/mesh that/those particular layer(s)
in discrete mode and specify point size/color individually.
Maybe just Classroom edu, but still interesting.

2. For you "Smath Cracks" the 2nd work sheet is a better view
of the "De Casteljau" svg algorithm. No way yet to force Smath
do same. Just don't confuse yourself: in each line algo you see
a + sign. That's NOT arithmetic, just Mathcad code to
generate the two NOT matrix, the two scalar functions.
You see M, then M is the scalar two directions 'x, y'.
Next blue moon, I will try again.

Jean

First work sheet is monster big [3 MB]

De Casteljau SVG IrfanView.sm (75 KiB) downloaded 53 time(s).
De Casteljau SVG.sm (2 MiB) downloaded 48 time(s).

De Casteljau's algorithm for SMath Studio (all made using only built-in features) :d

De Casteljau.sm (22 KiB) downloaded 42 time(s). (cloud)

Thank you so much Davide for rescueing this piece of graphic math.
I was several "picollina" away from the track.

Jean