ROTATE

PRO

CALL SEQUENCE

CALL PRO (ROTANG, ERRIND, XFRMT)

INPUT PARAMETERS

REAL ROTANG

Rotation angle in radians.

Positive angle: anticlockwise direction.

Negative angle: clockwise direction.

OUTPUT PARAMETERS

INTEGER ERRIND

Error indicator

REAL XFRMT(3,3)

Homogeneous 3 x 3 matrix..

PHIGS STATE

EFFECT

Returns a homogeneous 3 x 3 matrix to be used for the 2D rotation defined by ROTANG. The rotation ROTANG is specified in radians. A positive value causes rotation in the counterclockwise direction.

The returned matrix can be used as the transformation matrix for the SET LOCAL TRANSFORMATION MATRIX, SET GLOBAL TRANSFORMATION MATRIX, and similar functions.

ERRORS

2

Ignoring function, function requires state (PHOP, *,*,*)

SEE ALSO

set global transformation, set local transformation, translate, scale, rotate, compose matrix, build transformation matrix, compose transformation matrix