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Geometry

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Geometry refers to the physical items represented by the model (such as points, curves, and surfaces), independent of their spatial-or topological-relationships. The ACIS free-form geometry routines are based on non-uniform rational B-splines (NURBS).

In addition to manifold geometry, ACIS can represent non-manifold geometry. Geometry can be bounded, unbounded, or semi-bounded, allowing for complete and incomplete bodies. For example, a solid can have faces missing and existing faces can have missing edges. Solids can also have internal faces that divide the solid into cells.

Refer to the main section Geometry for more details.

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