The tools that generate surfaces from curves (Extrusion,
Sweep, ...) can now “retain” the initial curves and also remember how the
wireframe was generated.
This allows the editing of a surface not only from the
surface wireframe but from the construction curves which become the control curves of the
surface. The surface is automatically regenerated when editing the curves (like NURBS
control polygons).
Surface smoothing is now dynamic, as it is regenerated each time the “initial” surface or curve is modified.
Interpolated or smoothed polyline curves also retain the initial curve.
Dynamic Geometry properties are stackable and create control levels. You can choose to work on one of the object finishing levels.
Original object: Transformed object: The original object is a smoothed polyline. We transform the object by moving a point of the construction polyline.
The smoothed polyline is affected by this transformation.
Original object: Transformed object: The original object was generated by the extrusion of a circle (polyhedral) along a path (polyline).
The result has been smoothed.We transform the object by moving some points of the construction polyline.
The rough object (not smoothed) and the smoothed object are both affected by this transformation.
Other examples illustrate the Dynamic Geometry principle in the paragraph “How to edit an object in D.G.”.
