Insert Spline Numerically

A spline can be entered either graphically using the cursor (most common) or using the New Line dialog window (identical to the General Tab of the Edit Line dialog). Before using the New Line dialog window, one must first define points which are then used to define the line. Points defining the line are entered in the General Tab.

A spline is a set of more than 2 points connected smoothly by cubic arcs. HYDRUS allows three types of splines:

• cubic spline, i.e., a curve defined by multiple polynomials of the third order. It passes smoothly through all points.
• Bezier’s curve – a smooth curve that passes through boundary points, but does not have to pass through internal points .
• B-spline – a general Bezier’s curve.

More information can be found at:

http://mathworld.wolfram.com/BezierCurve.html

http://mathworld.wolfram.com/B-Spline.html