| | The UnitsAPI global functions are used to
convert a value from any unit into another unit.
Principles
Conversion is executed among three unit systems:
- the SI System
- the user's Local System
- the user's Current System.
The SI System is the standard international unit
system. It is indicated by SI in the synopses of
the UnitsAPI functions.
The MDTV System corresponds to the SI
international standard but the length unit and all
its derivatives use millimeters instead of the meters.
Both systems are proposed by Open CASCADE;
the SI System is the standard option. By
selecting one of these two systems, the user
defines his Local System through the
SetLocalSystem function. The Local System is
indicated by LS in the synopses of the UnitsAPI functions.
The user's Local System units can be modified in
the working environment. The user defines his
Current System by modifying its units through
the SetCurrentUnit function. The Current
System is indicated by Current in the synopses
of the UnitsAPI functions.
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1.6.3