AUTOSCALE Command

The AUTOSCALE command is typically:

AUTOSCALE

AUTOSCALE /ZONE1

AUTOSCALE /IDLIST-STEAM-PIPEWORK

The command carries out the various operations:

• The VIEW’s IDLN (ID List Name) attribute is set to the name of the Design item or IDList element to be drawn (/ZONE1 or /IDLIST-STEAM-PIPEWORK in our second and third examples).

• The VIEW's THPO (Through Position) attribute is set to the World coordinates corresponding to the centre of interest of the Design items to be drawn.

• The VIEW's VSCA (View Scale) attribute is set to a value calculated such that the drawn Design items fit within the View rectangle. The current values of the VIEW's DIR and SIZE attributes are used (these define the 'looking direction' and the size of the rectangle).

  Note:
  The AUTOSCALE command only sets the IDLN attribute if it has not already been set. A second AUTOSCALE command does not change the IDLN (but the specified Design item or IDList is used in the recalculation of the VSCA and THPO attributes). An AUTOSCALE command by itself uses the existing IDLN setting to recalculate VSCA and THPO.