LUX is a program for (numerical) data processing and image processing. See http://lux.quae.nl for its packaged source code distribution and for the on-line LUX manual. See the README and INSTALL files for additional information.
LUX includes the third party software packages mentioned below.
The LUX source code includes some Fast Fourier Transform routines based on FFTPACK version 4 by Paul N. Swarztrauber (April 1985), copied from the Netlib CDROM (2nd edition), translated from Fortran to C using f2c, with manual cleanup by Louis Strous (15 June 1998).
LUX also uses (through linking, not in the form of source code) Fast Fourier Transform routines from the GNU Scientific Library (GSL), which routines are themselves also based on FFTPACK. The direct use of FFTPACK source code is being phased out, in favor of the routines from GSL.
LUX includes source code from the "Standards of Fundamental Astronomy (SOFA)" Library for ANSI C, obtained from http://www.iausofa.org/index.html. LUX uses routines and computations derived by the author of LUX from software provided by SOFA under license to the author of LUX. LUX does not itself constitute software provided by and/or endorsed by SOFA.
The SOFA library comes complete with its own "makefile", which is not suitable for including in an autoconfiscated project such as LUX. The SOFA sources were adapted as follows for inclusion into the current project:
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Change into the "sofa" subdirectory of the current project's main directory:
cd sofa
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Extract the sofa sources from the tarball:
tar xzf Location_of_Tarball/sofa_c-20120301_a.tar.gz
This yields a subdirectory "sofa" in the current directory, which is itself also called "sofa" (i.e., the new subdirectory is "sofa/sofa" relative to the project's main directory).
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Locate the "c" subdirectory in the extracted sources (it is several directory levels down) and copy its contents into the current directory:
cp -r sofa/20120301_a/c/* .
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Remove the extracted directory, as it is not needed anymore:
rm -rf sofa
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Rename SOFA's original "makefile" so it is not run and causes no trouble:
mv src/makefile src/original-makefile
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Create our own "src/Makefile.am" that builds "libsofa_c.a" from the SOFA *.c and *.h files in the "src" subdirectory.
Many SOFA routines are bound to LUX subroutines or functions. The names of the LUX subroutines or functions bound to SOFA routines are the same as the names of the SOFA routines, but with the "iau" prefix removed to comply with the SOFA license.