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Description:
This routine returns the upper and lower limits of the box defining the domain of either the forward
or inverse transformation of a
ChebyMap. These are the values that were supplied when the
ChebyMap was created.
Invocation
CALL AST_CHEBYDOMAIN( THIS, FORWARD, LBND, UBND,
STATUS )
Arguments
THIS = INTEGER (Given)
Pointer to the ChebyMap.
FORWARD =
LOGICAL (Given)
A .TRUE. value indicates that the domain of the ChebyMap’ s forward
transformation is to be returned, while a zero value indicates that the domain of the inverse
transformation should be returned.
LBND() = DOUBLE PRECISION (Returned)
An array in which
to return the lower axis bounds of the ChebyMap domain. The number of elements should be at least
equal to the number of ChebyMap inputs (if FORWARD is .TRUE.), or outputs (if FORWARD is
.FALSE.).
UBND() = DOUBLE PRECISION (Returned)
An array in which to return the upper
axis bounds of the ChebyMap domain. The number of elements should be at least equal
to the number of ChebyMap inputs (if FORWARD is .TRUE.), or outputs (if FORWARD
is .FALSE.).
STATUS = INTEGER (Given and Returned)
The global status.
Notes:
-
If the requested transformation is undefined (i.e. no transformation coefficients were specified when
the ChebyMap was created), this method returns a box determined using the AST_MAPBOX method
on the opposite transformation, if the opposite transformation is defined.
-
If the above procedure fails to determine a bounding box, the supplied arrays are filled with
AST__BAD values but no error is reported.
Copyright (C) 2021 East Asian Observatory
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- AST
A Library for Handling
World Coordinate
Systems
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