progeCAD Professional manual The low-cost alternative to AutoCAD

Index



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Creating complex entities

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.

To draw a spline
  1. Do one of the following:
  2. Choose Draw > Spline.
  3. On the Draw toolbar, click the Spline tool (
  4. ).
  • Type spline and then press Enter.
  • Specify the first point of the spline.
  • Specify the second point of the spline.
  • Specify as many more points as you want.
  • When you have finished, press Enter.
  • You can add tangents to the spline, which are lines that give it shape.
To add tangents to a spline
  1. Specify the starting tangent point.
  2. Specify the ending tangent point.
  3.  

     

     

    Spline.

     

    Spline with starting tangent point ( A ) and ending tangent point ( B ).