Structural Geomset Primitives

The following primitive elements are used by Structural Geomsets. They all have the standard attributes and the common attributes LEVEL, CLFLA, TUFLA and OBST. The additional particular attributes of each element are as described below.

Note that each 2D primitive has effectively two types of positional attributes which allow its geometry to be changed progressively as it is extruded in space to create a 3D design element (such as a structural SCTN or GENSEC element). The P... attributes define the geometry at the Start of an extruded section, while the D... attributes define the change in that geometry between the Start and End of the extruded section.