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AST_BEGIN
-
Begin a new AST context
- Description:
- This routine begins a new AST context. Any Object pointers
created within this context will be annulled when it is later
ended using AST_END (just as if AST_ANNUL had been invoked),
unless they have first been exported using AST_EXPORT or rendered
exempt using AST_EXEMPT. If
annulling a pointer causes an Object's RefCount attribute to
fall to zero (which happens when the last pointer to it is
annulled), then the Object will be deleted.
- Invocation:
- CALL AST_BEGIN( STATUS )
- Arguments:
-
STATUS = INTEGER (Given and Returned)
-
The global status.
- Class Applicability:
-
Object
-
This routine applies to all Objects.
- Notes:
- This routine attempts to execute even if STATUS is set to an
error value.
- Contexts delimited by AST_BEGIN and AST_END may be nested to any
depth.
Next: AST_BORDER - Draw a border around valid regions of a Plot
Up: AST Routine Descriptions
Previous: AST_BBUF - Begin a new graphical buffering context
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