User-defined Extrusion (SEXT)

This primitive is generated by extruding a user-defined 2D shape, known as a Loop (SLOO), whose outline is defined by a set of member elements called Vertices (SVER). The lines joining adjacent SVERs form the edges of the SLOO. The extrusion distance is defined by the height of the SEXT to give the final 3D volume.

In addition to the attributes defining its position, each SVER can have a radius which applies a convex or concave fillet to the loop at that point.

SEXT has particular attributes as follows:

• PX, PY, PZ - coordinates of origin of SLOO

• PAAX, - directions of axes of SLOO

• PBAX - (these will define coordinate system for SVERs)

• PHEI - distance by which 2D SLOO is extruded to form 3D SEXT

SLOO has no special attributes.

SVER has particular attributes as follows:

• PX, PY - coordinates of vertex

• PRAD - fillet radius of loop at vertex position

  

  User-defined Extrusion Catalog Primitive