Syntax of geometric primitives

Primitives can be classified into two groups.

• Primary primitives are 3D-primitives that have volume. The final geometric model only consists of primary primitives.

• Secondary primitives are only used during the declaration phase - points, lines, and planes; they do not have a measurable volume and do not appear in the final model.

Many primitives have more than one form of declaration. The interpretation of a declaration thus depends on the type and number of given arguments.

Note: Wall thickness must be given in the declarations, although they are not currently used by the system.

Expressions that use an angle measure may use either radians or degrees. If variable _UseDegrees is defined in the GDL file, then angle measures are interpreted to be degrees.