Hi Sansbury,
I have a bit. It would seem simple on a single arc, but it can become convoluted, especially in a Cad/Cam app where precision is required. For instance, what if you had added a dimension to the arc? A connected Tangent line? What happens to the rest of the model? Then moving into 3d.
Whether its creating a "new entity" or just modifying the existing geometry, Implementing it would be an involved process. You really couldnt do it "Partially", it could get confusing to the user. So in its simplist form, changing geometry has to be re-dealt with.
I think in V23 they are starting to implement this as when you go to re-select geometry, the original entities are preselected! I'll test and post back if this works as you expect in the newest version.
Burr |