3D Graphics Programming with QuickDraw 3D 1.5.4

Rotate-About-Axis Transforms

Labels

ASCII: RotateAboutAxis
Binary: rtaa ( = 0x72746161 )

Data Format



 
Point3D             origin

Vector3D            orientation

Float32             radians

origin: The origin of the axis of rotation.
orientation: The orientation of the axis of rotation. This vector should be normalized.
radians: The number of radians by which an affected object is rotated.

Data Size

Description

A rotate-about-axis transform rotates an object about an arbitrary axis in space by a specified number of radians. The value in the origin field and the orientation vector are used to define the axis of rotation.

Parent Hierarchy

Shared, shape, transform.

Parent Objects

None.

Child Objects

None.

Example



 
RotateAboutAxis (

    20 0 0                  # origin

    .33 .33 .34             # orientation

    1.57                    # radians

)