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From: Michael Gibson
Hi Brian,
> So: Is the second derivative at NURBS parameter "t" associated with point on the curve
> <<<Equivalent>>> to the Normal at the point ?
No, but they are related. The curvature vector is calculated from the first and second derivative.
- Michael
From: bemfarmer
Thank's Michael,
Back to vector math calculus class for me :-)
- Brian
From: bemfarmer
Todays idea is to perform a sphere sweep on a curve, using Flow.
Unwrap the curve.
Sphere radii vary along the arc length.
The envelope, for the unwrapped curve (straight line), is a surface of revolution.
The rate of change of the radii equation with arclength to be limited by ?
To get the planar curve to revolve... ???
- Brian
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