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Ruled Surface Directrix

The curve b(u) in the ruled surface parameterization

x(u,v)=b(u)+vd(u)

is called the directrix (or base curve).

See also

Director Curve, Ruled Surface

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References

Gray, A. Modern Differential Geometry of Curves and Surfaces with Mathematica, 2nd ed. Boca Raton, FL: CRC Press, p. 431, 1997.

Referenced on Wolfram|Alpha

Ruled Surface Directrix

Cite this as:

Weisstein, Eric W. "Ruled Surface Directrix." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/RuledSurfaceDirectrix.html

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