...Even if it seemed to be the worst thing ever, I *NEED* to develop software for my own well being and even if I apparently - after over 20 years since the first lines of code I wrote - I improved my ability not a single bit than it is like that and I can't change it.
BTW: there was feedback indeed: from the own 'family': "it is done by YOU so it cannot be of use for anybody!"
(Literally: it contains algorithms and algorithms are evil and are non-existent in usable software)
Lienzo is a gtk-Canvas and Lua program to work in geometry. Unlike others like Cinderella, Cabri, DrGeo, etc... this one focuses in algorithms, not in static figures. the lua interface allows to work with programable objects.