Class Name: Rotation

Superclass - <LSR Transformation Step>

Subclasses

Definition

An instance of this DRM class specifies a rotation of the given angle about the specified axis, in the direction determined by the right-hand rule.

Primary Page in DRM Diagram:

• 7

Secondary Pages in DRM Diagram:

• 5

Example

1. Rotate 145 degrees about the X axis.

2. Rotate -38.5 degrees about the Z axis
3. Rotate 97 degrees about the Y axis

FAQs

How can a data provider specify a rotation about a point other than the origin?

To specify a rotation about a point other than the origin of the given LSR spatial reference frame for a given <LSR Transformation> instance, the data provider would precede the given <Rotation> instance by a <Translation> that translates to the desired rotation point.

Constraints

Composed of (two-way)(inherited)

• zero or one <Reference Vector> instance (notes)

Composed of (two-way)

• zero or one <Rotation Control Link> instance

Component of (two-way)(inherited)

• zero or one <LSR Transformation> instance

Component of (two-way)

• zero or more <Camera Point> instances

Inherited Field Elements

Field Elements

Notes

Composed of Notes

Reference_Vector

 If specified, this <Reference Vector> instance shall have
 vector_type = SE_REF_VEC_TYP_LSR_TRANSFORMATION_AXIS.

Fields Notes

axis

 This specifies which axis to rotate around: X, Y, Z, or a
 <Reference Vector>. Note that SE_LSR_TRNSFRM_AXIS_ALL is
 not a valid value for a <Rotation> instance.

angle

 This specifies the angle of rotation, measured counterclockwise
 about the given axis, in degrees of arc.