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3DCS directly uses the CAD geometry in order to define the dimensions used in the model.  3DCS routines can use:

•Points, which may be tied to (Feature Points), or independent of (Coordinate Points) CAD geometry.

•Mesh, which is tied to the CAD geometry and represents the skin of the part. The mesh accuracy is related to the Minimum Segment # and Feature Locator Point.

•For both Mesh and Feature Points, a change to the CAD geometry can be propagated to the 3DCS model using the Update Model and Update Geometry functions.