Quaternion

• Quaternion Class (Quat)
  • Quat
  • QuatDescriptor
  • normalize()
  • quat_mult()
  • quat_to_equatorial()
• Quaternion Quick Facts
  • Quaternions
  • Rotations
  • Switching Representations

Quaternion provides a class and functions for manipulating quaternion objects.

The Quat class provides the following:

• Convenient ways to deal with rotation representations (equatorial coordinates, matrix and quaternion) including initialization and transformation.

• Methods to multiply and divide quaternions.

Additional convenience functions are provided for performance applications.

Copyright:

Smithsonian Astrophysical Observatory (2010)

Authors:

• Tom Aldcroft (aldcroft@cfa.harvard.edu)

• Jean Connelly (jconnelly@cfa.harvard.edu)

• Javier Gonzalez (javier.gonzalez@cfa.harvard.edu)