## INSTALL.TXT
 #
 # Copyright 2006-2012 David G. Barnes, Paul Bourke, Christopher Fluke
 #
 # This file is part of S2PLOT.
 #
 # S2PLOT is free software: you can redistribute it and/or modify it
 # under the terms of the GNU General Public License as published by
 # the Free Software Foundation, either version 3 of the License, or
 # (at your option) any later version.
 #
 # S2PLOT is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 # General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
 # along with S2PLOT.  If not, see <http://www.gnu.org/licenses/>. 
 #
 # We would appreciate it if research outcomes using S2PLOT would
 # provide the following acknowledgement:
 #
 # "Three-dimensional visualisation was conducted with the S2PLOT
 # progamming library"
 #
 # and a reference to
 #
 # D.G.Barnes, C.J.Fluke, P.D.Bourke & O.T.Parry, 2006, Publications
 # of the Astronomical Society of Australia, 23(2), 82-93.
 #
 # $Id: INSTALL.TXT 5830 2012-11-16 04:48:20Z dbarnes $
 #

0. WARNING
^^^^^^^^^^

Please note the information in this file may be out of date.

1. INTRODUCTION
^^^^^^^^^^^^^^^

S2PLOT is the Swinburne 3d Plotting Library, which is a library for
simple and efficient display of scientific data plots in 3-dimensions.

S2PLOT provides point, vector, surface and volume plotting routines,
has axis marking and labelling capabilities, and callback function
support to enable complex, interactive and dynamic 3d plots
(eg. time-variable surface functions).  S2PLOT also provides
billboards, interactive handles, and label generation via FreeType
fonts and LaTeX.

At the completion of drawing, S2PLOT allows the user to navigate
freely in and around the 3-d world, using the keyboard and mouse, and
provides control of perspective, zoom, and rendering mode.  Frames can
be saved as high-resolution TGA files or the geometry itself can be
saved in a GEOM-format file for later viewing.  Geometry can also be
saved to a VRML97-format file for subsequent import to Acrobat 3D or
conversion to X3D and use in the s2web Flash player. Geometry, and in
particular advanced visualisations such as surface and volume
renderings, can also be exported to PRC format and embedded in PDF
files.

S2PLOT supports monoscopic (normal) displays, and Swinburne's active
(frame-sequential) and passive (dual-projector) stereoscope displays.
Anaglyph (red-cyan) stereo and fisheye and dome display support are
also available.  Only limited device support is available in the
S2PLOT open source distribution, however.

Use of S2PLOT from C, C++ and FORTRAN is straightforward.  Sample C
code demonstrating every available S2PLOT function is included with
the distribution.  An external Python module is available.

S2PLOT is now supplied in source code format. Currently supported*
architectures & operating systems are as follows, nomenclature being:

  operating_system-compiler_provider-cpu_architecture

  linux-gnu-i386
  linux-gnu-x86_64
  darwin-gnu-i386
  darwin-gnu-x86_64

(*) supported, as in generally work out of the box.  Actual support
cannot be provided by the developers.

2. PREREQUISITES
^^^^^^^^^^^^^^^^

2A. S2PLOT provides native C and FORTRAN (77, 90) wrapper interfaces 
    on the systems listed in the introduction.

2B. Compilers: for precise details of the compilers used to build
    S2PLOT - and therefore suitable for compiling and linking 
    S2PLOT programs - see ENVIRONMENT.TXT which provides information
    on the supplied builds.

    The GNU compilers (http://gcc.gnu.org) are used to build all 
    systems.  Versions >= 4.3 are recommended.

2C. You will need an OpenGL-compliant library and GLUT (or a
    100% compatible) library as well as suitable headers (.h files).

    For GNU/Linux systems with NVidia graphics cards, you may find
    suitable hardware-accelerated support for your card at
    www.nvidia.com.  The NVidia distribution includes a
    hardware-accelerated OpenGL library.  If you do not have a
    supported card, you will need to install Mesa3D, which is a 
    software equivalent of OpenGL.  Most Linux distributions
    include packages for installing the GLUT library, and Mesa3D
    if it is needed.  On Linux systems, you must have the "glx"
    extension loaded in your XServer for OpenGL graphics to work.

    Apple/OSX includes hardware-accelerated OpenGL support.  It also
    includes an implementation of GLUT.  The darwin builds of S2PLOT
    do not require X11.app.

    *** NB. there are many hundreds of variations of hardware and 
        software.  Helping users to get OpenGL working on their machine
	is not the role of the S2PLOT developers.  Please discuss this
	with your system adminstrator.


3. INSTALLATION
^^^^^^^^^^^^^^^

You should have received the file you are now reading as part of a
bzip2'ed tar file named according to the following pattern:

  s2plot-N.MM.tar.bz2,

where:

	* N  is the major version
	* MM is the minor version

Unzipping (using bunzip2) and untarring the distribution file/s from
the same "root" directory will produce a directory named by the
pattern s2plot-A.BB, containing the S2PLOT distribution.

The recommended installation location is /usr/local, such that the
directory /usr/local/s2plot-A.BB is produced.  Then a soft-link is
made /usr/local/s2plot->/usr/local/s2plot-A.BB.  This means that 
/usr/local/s2plot always refers to the newest version, but older
versions can be retained and used if necessary.

There are no known impediments to installing S2PLOT somewhere else.

After uncompressing the distribution, check that the definition of 
S2X11PATH in the file "s2plot.csh" points correctly to the directory
containing the X-Windows header files and libraries.

Please continue to section 4 and 5 below for configuration and build
instructions. 

4. USER CONFIGURATION
^^^^^^^^^^^^^^^^^^^^^

Users must configure their environment to build and/or use S2PLOT.
All environment variables are described in ENVIRONMENT.TXT, but we
review the most important settings here:

4A. [REQUIRED] For all users of S2PLOT code, the environment variable
    S2PATH absolutely postively MUST be set to the installation
    location!  For the recommended location with soft-link, this means
    setting S2PATH to "/usr/local/s2plot".  To use a specific version
    of S2PLOT, this may be changed to "/usr/local/s2plot-A.BB" where
    the version is specified by A.BB.  Adjust this as necessary for
    non-standard installations.

4B. [REQUIRED] It is necssary that users set the environment variable
    S2ARCH to choose their build architecture.  Possible values are
    listed in ENVIRONMENT.TXT and have been repeated in section 1. of
    this document.  Take care to differentiate between minus signs and
    underscores.

4C. [RECOMMENDED] Users will probably find it necessary to configure the
    dynamic linker on their system to find the S2PLOT library.  On
    most systems this can be accomplished by adding the string:

    ${S2PATH}/${S2ARCH}

    to the colon-separated environment variable LD_LIBRARY_PATH 
    (linux) or DYLD_LIBRARY_PATH (darwin).

4D. [RECOMMENDED] Users may add the string ${S2PATH}/scripts to their
    executable path to make calling the various utility scripts
    (e.g. 'cbuild.csh') simple.

4E. [RECOMMENDED] Users may add the string ${S2PATH}/${S2ARCH} to their
    executable path to make calling the sample programs and apps simple.


5. BUILDING FROM SOURCE CODE
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

S2PLOT must be built from source code.  

IMPORTANT NOTE: some parts of S2PLOT, specifically some device drivers
and support for window systems other than GLUT, are closed source.  If
you build from source, the closed source drivers will be removed
unless you use the "-n" switch to prevent the build directory from
being cleaned.  If you inadvertently remove the closed source device 
driver binaries, you can always retrieve them from the binary
distribution for the architecture of interest.

To build from source code, ensure you have set the S2PATH and S2ARCH
environment variables (see above).  Examine the architecture
configuration file, ${S2PATH}/scripts/${S2ARCH}.in and check that the
compiler path/s (COMPPATH and FOMPPATH) are appropriately set.  Set
the S2FREETYPE and S2FREEGLUT variables accordingly (see
ENVIRONMENT.TXT), and then in the $S2PATH directory simply issue the
command "./scripts/build.csh".

If build.csh fails, the most likely cause is that configuration
settings in your environment are incorrect or incompatible with
S2PLOT, or, the settings as defined in $S2PATH/scripts/$S2ARCH.in are
not correct for your build system.  Please check carefully that
compilers are correctly identified, that compile options and flags are
sensible and appropriate, and that you have set the environment flags 
correctly as described above in this file.

The build.csh script simply calls a number of other scripts in turn.
The libraries themselves are built with "build-lib.csh", then the
applications in the "apps" subdirectory are built with
"build-apps.csh", then the standalone viewer is built, and finally the
example codes are compiled and linked against the S2PLOT libraries.
If you have trouble with "build.csh", it is recommended you first try
the partial steps in order, before asking for help on the S2PLOT
Google Group.

6. TESTING
^^^^^^^^^^

With the S2PLOT library installed, and the configuration as described
above done, you should be in a position to run the sample programs,
that are delivered in source code form and as precompiled binaries.

6A. Firstly, test that you can run the programs.  They are found in

    ${S2PATH}/${S2ARCH}.  You should only try to execute the
    appropriate binaries for your system!  Some of the programs
    will prompt for the device to use, so be sure to run the binaries
    from a terminal, rather than double-clicking on them in a Finder
    (or other file manager) window.

    If you get errors such as:

[Apple/OSX] dyld: ./s2uc3 can't open library: @executable_path/libs2plot.dylib

[GNU/Linux] linux/s2uc1: error while loading shared libraries: libs2plot.so

    then you have encountered a problem with configuration of the
    dynamic loader and the (DY)LD_LIBRARY_PATH setting.  Please revisit
    4C. above.

6B. Now try to compile an S2PLOT program.  Copy eg. "s2funxyr.c" from
    the directory ${S2PATH}/examples to your own directory.  Now do:

    cbuild.csh s2funxyr

    and hopefully an executable binary will be built for you.  Check
    you can run it.

If you are unable to run or build S2PLOT programs, please check that
you have set the necessary environment variables.  $S2PATH and $S2ARCH
are critical.  Please also check that you have compilers and libraries
installed that are similar if not the same as those described for your
chosen $S2ARCH in ENVIRONMENT.TXT.  Finally for compilation, if your
header (include) files and libraries are in non-standard locations,
you may need to copy cbuild.csh and modify it to suit.


7. CLOSING
^^^^^^^^^^

Thanks for giving S2PLOT a go!  Hopefully you managed to get it
working and you find it a useful library, and if you do, we encourage
you to acknowledge the authors by citing our paper/s on S2PLOT and/or
visualisation.

 - David G. Barnes, September 2012.