Geometric modeling kernel
A geometric modeling kernel is a 3D solid modeling software component used in computer-aided design
Computer-aided design
Computer-aided design , also known as computer-aided design and drafting , is the use of computer technology for the process of design and design-documentation. Computer Aided Drafting describes the process of drafting with a computer...

 packages. Examples include Romulus
Romulus (b-rep solid modeler)
The Romulus b-rep solid modeler was released in 1982 by Ian Braid, Charles Lang and the Shape Data team in Cambridge, England. It was the first commercial solid modeling kernel designed for straightforward integration into CAD software...

, Parasolid
Parasolid is a geometric modeling kernel originally developed by ShapeData, now owned by Siemens PLM Software , that can be licensed by other companies for use in their 3D computer graphics software products....

The 3D ACIS Modeler is a 3D modelling kernel owned by Spatial Corporation . ACIS is used by many software developers in industries such as computer-aided design , Computer-aided manufacturing , Computer-aided engineering , Architecture, engineering and construction , Coordinate-measuring machine...

, ShapeManager
ShapeManager is a 3D geometric modeling kernel used by Autodesk Inventor and other Autodesk products. ShapeManager is derived from the ACIS geometric modeling kernel....

 and Open CASCADE
Open CASCADE Technology is a software development platform for 3D CAD, CAM, CAE, etc. that is developed and supported by OPEN CASCADE SAS. It is available under the "Open CASCADE Technology Public License" which the developer claims to be . Despite this claim, it is not listed as compatible with...

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