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astGetFrame
-
Obtain a pointer to a specified Frame in a FrameSet
- Description:
- This function returns a pointer to a specified Frame in a
FrameSet.
- Synopsis:
- AstFrame
astGetFrame( AstFrameSet
this, int iframe )
- Parameters:
-
this
-
Pointer to the FrameSet.
-
iframe
-
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).
- Returned Value:
-
astGetFrame()
-
A pointer to the requested Frame.
- Notes:
- A value of AST__BASE or AST__CURRENT may be given for the
"iframe" parameter 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 the AST error status set, or if it
should fail for any reason.
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Up: AST Function Descriptions
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AST A Library for Handling World Coordinate Systems in Astronomy
Starlink User Note 211
R.F. Warren-Smith & D.S. Berry
24th May 2011
E-mail:ussc@star.rl.ac.uk
Copyright (C) 2009 Science \& Technology Facilities Council