Primitive Data

Primitives available in the system, can be described in a primitive group. Such a group always starts and ends with keywords, specific for the primitive. In between these keywords, additional keywords describe the geometric data of the primitive.

The primitives available are:

• cylinder

• cap (spherical segment)

• parallel epiped

• cone

• torus

• rotational cylinder

• general cylinder (extrusion primitive)

• contour (a 3D curve, for example, a frame curve)

Holes, for example. on hull plates, are described as 3D contour primitives with the initial keyword HOLE_DATA and the ending keyword END_OF_HOLE_DATA. Holes can only occur within general cylinders and must not intersect or touch the outer contour of the surrounding general cylinder. Thus, the primitives describing a general cylinder with two holes may have the layout described below.

Note: Imported VRML or SAT primitives cannot be exported with this link.