NAME

DoRotate − Create a rotation geometric transformation object

SYNOPSIS

C:

DtObject DoRotate(axis, radians)
DtAxis axis;
DtReal radians;

Fortran:

INTEGER∗4 DOROT(AXIS, RADIAN)
INTEGER∗4 AXIS
REAL∗8 RADIAN

DESCRIPTION

DoRotate creates a rotation geometric transformation object that modifies the current transformation matrix attribute. 

The parameter axis specifies the coordinate axis about which the rotation is to take place.  Possible values are:

DcXAxis <DCXAX>

DcYAxis <DCYAX>

DcZAxis <DCZAX>

The parameter radians specifies the angle of rotation.  It may take any positive or negative floating point value.  Positive rotations are determined by the right-hand rule; when looking down a given axis from the direction of positive infinity towards the origin, positive rotations are counterclockwise. 

SEE ALSO

DoLookAtFrom(3D), DoScale(3D), DoShear(3D), DoTransformMatrix(3D), DoTranslate(3D)

September 29, 2021