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Drawing splines


A spline is a smooth curve defined by a set of points. You can use splines to create

sculptured shapes such as the cross section of a turbine blade or an airplane wing.


Specifying fit tolerance

By default, a spline passes through all of the control points. When you draw a spline,

you can change this by specifying the fit tolerance. The fit tolerance value determines

how closely the spline fits the set of points you specify. For example, a spline fit tolerance

value of 0 causes the spline to pass through the control points. A value of 0.01

creates a spline that passes through the start and endpoints and within 0.01 units of

the intermediate control points.


Drawing a closed spline

You can draw a closed spline, which is a spline for which the start point and endpoint

are the same. Because the spline is closed, you specify only one tangent.


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