See Expression Elements

Expression Value: Thin in Z _thinZ&

Expression Element: Built-in Properties

Expression Category: Geometry

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Thin in Z

Does all geometry in the item have the same Z coordinate?

Expression Syntax: _thinZ&

_thinZ& returns True if all geometry in the item, have the same Y coordinate, returns False if all geometry in the item do not have the same Z coordinate.l

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