Units in Real Expressions

Real expressions evaluate to a real and a resultant dimension (physical quantity or measure). For example:

• Adding two distances together create a distance (or length) quantity.

• Multiplying two distances creates a quantity of area.

Functions require compatible units, for example, trigonometric functions will expect to operate on angles.

If a pure numeric is supplied instead of a physical quantity then it must be a compatible physical quantity (for example, SIN(!ANGLE) or !DIST +!DIST) then it will be assumed to be of that quantity and in current working units of that quantity. Otherwise, it will be simply taken to be a number.

The result of the expression will be returned in current working units of the dimensions (for example, 1meter + 10cm will return 1100mm when current distance units are mm).