Geometry Kernel

A geometry kernel (or geometric modeling kernel) is the foundational software library in a CAD system responsible for creating, editing, and representing precise 3D geometry. The most widely used kernels are Parasolid (developed by UGS/Siemens) and ACIS (developed by Spatial/Dassault). The geometry kernel defines the mathematical representation of surfaces and solids that the CAD application builds on top of.