The following describes the most significant changes which have
occurred in the AST library between versions V9.2.13 and V9.2.14 (the
current version):
- A bug that could cause astMapSplitastMapSplit to enter an infinite loop has been
fixed.
- A memory leak in the MocMoc class has been fixed.
- A PolyMapPolyMap that is equivalent to a simple shift of origin and/or a linear
scaling on each axis is now simplified to a combination of equivalent
simpler classes..
- If a PolyMap contains multiple coefficients that relate to the same
input axis powers, they are now combined into a single coefficient.
- Zero-valued coefficients are now ignored by the PolyMap constructor,
rather than being stored within the PolyMap.
- The FitsChanFitsChan class can now create FITS headers containing SIP
distortion keywords from a wider range of FrameSets. A PolyMap must
still be present in the FrameSetFrameSet but it is now allowed to deviate from
the strict requirements of the SIP documentation in various ways (but
only in ways that allow it to be transformed into a PolyMap that does
meet the requirements).
Programs which are statically linked will need to be re-linked in
order to take advantage of these new facilities.
