On Friday, August 26, 2022 at 8:04:02 AM UTC+9 Kwankyu Lee wrote: > On Friday, August 26, 2022 at 2:57:15 AM UTC+9 Nils Bruin wrote: > >> On Thursday, 25 August 2022 at 07:23:41 UTC-7 Kwankyu Lee wrote: >> >>> But an intuitive way (or an object-oriented way ?) is to get the >>> necessary information from the line segment. Thus if L is the line segment, >>> I do p = L.mid_point(); r = L.length() / 2. Then circle(p, r) will do the >>> work. >>> >> >> That sounds like the model that geogebra uses. >> > > Yes. It would be a programming interface of the model. >
Now I have this idea. (Sorry for the vague original post.) We add new class "GeometricFigure2d" and "GeometricFigure3d". Line segments, circle, etc would be subclasses. So we can do l = figures.Line((1,2,3), (2,4,6)) p = l.mid_point() r = l.length() c = figures.Circle(p, r) c.render(color="green") # to get the rendered graphics object We may say that the classes "GeometricFigure2(3)d" implements descriptive geometry but with coordinates, for drawing purpose but not geometry. -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/8de0d74d-63fe-491a-b7ac-e651702e8cd6n%40googlegroups.com.
