Interpolating Cubic BSpline


The Interpolating Cubic BSpline entity is a curve based on a Cublic BSpline which interpolates its definition points. Three options for generating the curve are available in the attribute panel which change the type of continuity, knot spacing and control point arrangement. The end conditions near the end points can also be controlled from the attributes panel.


Menu: Create -> Interpolating Cubic BSpline

Interactively create a Interpolating Cublic BSpline curve by Left-Clicking to create the points of the control polygon. The initial orientation of curve will be defined on the Default Edit Plane.

See Also:-

Interactive Editing

Edit mode is entered by pressing F2 displaying the control polygon of the curve. The control points of the entity are selected and edited using the PolyCAD standard manipulation techniques.

See Also:-

Entity Attributes Panel

Interpolating Cubic BSpline attribute panel

Edit Menu

Multi-Select Menu

Display Options

Show Curvature

Short Cuts

File Format


Import / Export

Format Import Export
AutoCAD DXF   Yes
Initial Graphics Exchange Spec. (IGES)   Yes
Ansys Element Script   as Polyline
Gridgen Glyph Script   Control points only, Convert Curve to Polyline
ACIS (Autodeck/Tribon/Aveva Marine Initial Design)   Yes