API Reference > Classes > Export Classes > TB_IFCEXPORT Namespace > Classes > IsExternalCalculator Class
IsExternalCalculator Class
Syntax
C++
class IsExternalCalculator : public PropertyCalculator;

TbIfcIsExternalCalculator.h

A calculation class to calculate external value for an element.

Default constructor. 
Calculates the external value for an element.
 
Gets the calculated boolean value.
 
Gets a reference to singleton calculator object.
 
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