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AST_GETFRAME - Obtain a pointer to a specified Frame in a FrameSet

Description:
This function returns a pointer to a specified Frame in a FrameSet.
Invocation:
RESULT = AST_GETFRAME( THIS, IFRAME, STATUS )
Arguments:
THIS = INTEGER (Given)
Pointer to the FrameSet.
IFRAME = INTEGER (Given)
The index of the required Frame within the FrameSet. This value should lie in the range from 1 to the number of Frames in the FrameSet (as given by its Nframe attribute).
STATUS = INTEGER (Given and Returned)
The global status.
Returned Value:
AST_GETFRAME = INTEGER
A pointer to the requested Frame.
Notes:
  • A value of AST__BASE or AST__CURRENT may be given for the IFRAME argument to specify the base Frame or the current Frame respectively.

  • This function increments the RefCount attribute of the selected Frame by one.

  • A null Object pointer (AST__NULL) will be returned if this function is invoked with STATUS set to an error value, or if it should fail for any reason.


next up previous 264
Next: AST_GETGRFCONTEXT - Return the KeyMap that describes a Plot's graphics context
Up: AST Routine Descriptions
Previous: AST_GETFITSX - Get a named keyword value from a FitsChan

AST A Library for Handling World Coordinate Systems in Astronomy
Starlink User Note 210
R.F. Warren-Smith & D.S. Berry
24th May 2011
E-mail:ussc@star.rl.ac.uk

Copyright (C) 2009 Science \& Technology Facilities Council