3.1.4.2 Unary forms
Unary or one-operand forms
are summarized in the following table, where X
stands for the operand.
| Op | Operand
| Result | Description
|
|---|
-X | scalar
| scalar | Unary scalar negation.
|
-X | vector
| vector | Unary vector negation.
|
|X| | vector
| scalar | Vector length.
|
unit(X) | vector
| vector | Unit vector with same direction.
|
sqrt(X) | scalar
| scalar | Scalar square root.
|
sin(X) | scalar
| scalar | Trigonometric sine (X in degrees).
|
cos(X) | scalar
| scalar | Trigonometric cosine (X in degrees).
|
atan2(X,Y) | scalar
| scalar | Polar angle in degrees of vector [X,Y].
|
inverse(X) | transform
| transform | Inverse transform.
|
Errors are reported when |X|, unit, sqrt,
atan2, and inverse fail due to bad parameters.