Create Fitted B Spline Curve dialog

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 See also: Creating Fitted B Splines

Creates a B Spline curve based on digitised fit points rather than control points, so that the curve passes through all the fit points.

Once the fit points have been selected, the command converts them to the equivalent control points.

Dynamic - Check to move the B-spline on the screen by digitising existing points or screen positions, to see the effect on the curve as each new point is digitised.

Degree - Specifies a control factor for the B-spline curve, usually 3. Degree can vary from 1-10 but must be less than the number of control points. High values create flatter curves but take longer.

Start Angle - Specifies the slope (in degrees) at the start of the curve.

End Angle - Specifies the slope (in degrees) at the end of the curve.

Tolerance - Specifies a value to alter the displayed smoothness of the curve. Small tolerance values create smoother curves. Note that this is a display function only and does not alter the mathematically correct shape of the curve.

Break Points - Selects how the routes between each fit point are chosen:

Uniform - Use only when the fit points are spaced evenly. An uneven spacing results in unwanted loops and wiggles in the path.

Chord Length - The B-spline takes into account the actual distance between the fit points.

Name - Specifies a name for the B-spline curve entity. Use this name later to select the entity.