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Description:
This function 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.
Synopsis
void astChebyDomain( AstChebyMap
∗this, int forward,
double ∗lbnd,
double ∗ubnd
)
Parameters:
this
Pointer to the ChebyMap.
forward
A non-zero 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
Pointer to 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 non-zero), or outputs (if " forward" is zero).
ubnd
Pointer to 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 non-zero), or outputs (if " forward" is zero).
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 astMapBox 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
in Astronomy - Next→
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