X-Topology Curve


X-Topology Curves are used to define the wire framework from which X-Topology sufaces are generated. The underlying mathematics of the curve is based upon the BSpline definition but, through the use of constraints, the curve can interpolate its control points, form straight sections and blends. The curve can dynamically snap to other X-Topology curves, updating as the parent curve is changed. The tangent of curve through a control point attached to another curve may be controlled by its parent.


Menu: Create -> X-Topology Curve

Interactively create a X-Topology 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. One point to note is that when adding points, points constraints will be automatically added and removed so that the curve definition remains consistent.

See Also

Entity Attributes Panel

X-Topology Curve Attributes Panel

Edit Menu

Multi-Select Menu

Display Options

Short Cuts

File Format


Import / Export

Format Import Export
AutoCAD DXF   Yes as BSpline or Polyline
Initial Graphics Exchange Spec. (IGES)   Yes as BSpline
ACIS (Autodeck/Tribon/Aveva Marine Initial Design)   Yes as BSpline