Next: Coordinate Thorns Up: Coordinate system symmetries Previous: Coordinate system symmetries Contents
Specifying coordinate values
As mentioned above, for a uniform coordinate system, it is sufficient to specify the origin and spacing for a uniform coordinate. One may also specify a grid variable to hold the coordinate values, if desired. See section A3.7. A nonuniform coordinate can be specified with a 1D grid variable, if desired, or an nD variable. A warped coordinate system will always need a nD grid variable. FMR and AMR will need an nD grid variable to specify the coordinate values. A mixed coordinate system can use some combination of the above, or simply an nD grid variable.