Rotational Constructor - 3

Today I continued with the rotational constructor. I gave modifiers the ability to also draw lines and vertices. Normally only objects can draw, but some time ago I added a facility to allow the modifiers to draw simple objects (and evaluate the selections). To that facility I added more functions.

So now the rotational constructor can draw the profile line. The next step is to implement the selection function so the program knows which vertex was selected and then to add the ability to move the vertices. Then I will have to change the representation again so each line segment can be selected separately. That will be needed to allow adding vertices as many of my modifiers do it, by clicking an edge to split it into two parts.

I hope to soon have a working first version. I will see if I need to extend it when I use it for the first few objects.