SISL contains all the necessary functionality
for building applications needing free form geometry, including:
* Curve/surface creation.
* Curve/surface interrogation.
* Curve/surface manipulation.
* Curve/surface intersections for both NURBS and analytical geometry.
* Data reduction.
The high quality of the functionality and the high degree of accuracy in
numerical calculations, has been developed to satisfy the exacting
requirements arising when NURBS curves and surfaces are used in a
CAD/CAM system.