Hatching Rules

Each Hatching Rule references a Hatch Style element that defines the hatch pattern to be applied. For each Hatch Rule you can specify:

• Whether it applies to faces created by a section plane or to primitive surfaces.

• The orientation of the faces to be considered for hatching. There are three options:

  • All Directions, in which case the face is hatched regardless of its orientation.

  • Perpendicular Direction, in which case the face is only hatched if it is perpendicular to the viewing direction.

  • Specified Direction, in which case the face is only hatched if its normal matches a specified value. The normal of a face is the vector perpendicular to it and pointing out of the solid primitive. Thus, the normal of the uppermost horizontal surface of a box is Up.

The HRUL attributes, with their defaults, are:

Example

HSTYF /HSTYL1

FCODE SECTionedfaces
FCODE PRIMitivefaces

DCODE ALL Directions
DCODE PERPendiculardirection
DCODE SPECifieddirection

NORM standard AVEVA direction syntax

CRIT standard AVEVA selection criteria syntax

As well as the usual NEW command, an HRUL can also be defined by:

USE hstyl FOR criteria

which sets the HSTYF and CRIT attributes.