Next to the "BevOb" button you now have a "TaperOb" button to give a name
of a curve object which defines the width of extrusion of the 'BevObj'
along the curve. The TaperOb curve typically is horizontal, where the
height denotes the width.
Important rules;
- Only the firste curve in TaperObj is evaluated
- the first width is left, last width is right
- it scales the width of normal extrusions based on evaluating the taper
curve; which means sharp corners in taper curve won't be easily visible
(That latter feature could be improved by extrusing based on the points
in the taper curve; this is a *lot* more work)
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