Coons Patch


The Coons Patch entity is surface based on a BSpline Surface which is generated by interpolating between 2-4 BSpline curves whose end points are coincident. The surface is generated by linearly interpolating between the curves (bi-linear) or by cubically interpolating between the curves (bi-cubic) taking into account the tangent information of each curved defined by its adjacent curves. The coon patch entity is edited by modifying its definition curves although the surface itself can be extracted as a BSpline Surface.


Right-Click -> Multiple Selection -> Coons Patch

Create a Coons Patch by selecting 2-4 BSpline Curves whose end points are coincident.

See Also:-

Interactive Editing

The Coons Patch cannot be edited directly, but by it can be manipulated by editing any of its attached definition curves.

See Also:-

Entity Attributes Panel

Coons Patch Attributes Panel

Edit Menu

Multi-Select Menu

Display Options

Short Cuts

File Format


Import / Export

Format Import Export
AutoCAD DXF Yes Yes
Initial Graphics Exchange Spec. (IGES) Yes Yes
Ansys Element Script   as a Polygon List (Facets)
ACIS (Autodeck/Tribon/Aveva Marine Initial Design)   Yes (as Mesh if original representation not BSpline Surface)