StCAD is a basic 3D CAD framework in Smalltalk (VisualWorks 7.x). It extends the GF/ST 2D drawing framework into 3D. It also include 'StGeo' which is the 3D geometric domain, ‘StMath' which provides the mathematical support for 3D CAD and motion simulation computations, and 'StDoc' which is a simple word processor.
'StMath' is also suitable for engineering, scientific and business computing. The parcels are open source using Lesser GNU Public License. Users can use these parcels with other private software to create 3D applications like motion simulation, finite element analysis, CAD, scientific visualization, etc.
StCAD has been used to create a freeware called freeCAD and a shareware called CADSM(Released as freeCAD 9) which are 3D CAD with Motion Simulation. The parcel 'StMbD' has been included to provide a functional demonstration, but its source code is hidden.
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