PREV_MODE returns 0, if current script execution is during object generation and 1, if current script execution is during preview generation (e.g. if a SmartPart is modified by dragging of handles).
With this parameter you can simplify complex preview calculations (e.g reducing the resolution of curved geometries with RESOL/RISE/RADIUS) and thus improve the performance:
IF PREV_MODE THEN
...(code for preview construction)
ELSE
...(code for final construction)
ENDIF
Remarks
Usable since script version 1.1 (Allplan 2012-1).
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