/usr/share/doc/evolver-ogl/README.Debian is in evolver-ogl 2.70+ds-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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The `Surface Evolver' front-end comes in different variants that can coexist.
These variants are gathered in flavours, each flavour being distributed within
a distint Debian package. At the time of writing, there are 2 flavours: the
first flavour, the `nox' flavour, is a version the evolver front-end built with
the `Null graphics' module, that is, with literally no X support; the second
flavour, the `ogl' flavour, is compiled with the `OpenGL/GLUT display' module.
Both are built with routines for interfacing with Geomview via a pipe. For each
flavour, there are several variants that deal with distint floating point
formats: the `d' variant crunches `double' floating point numbers; the `ld'
variant calculates with `long double' floating point numbers; and, if supported
by the architecture, the `q' variant reckons with `quadruble' (`float128')
floating point numbers (and it uses the quadmath library for its arithmetic).
The variant suffix appended to each front-end is meant to be self-explanatory.
Information specific to each variant is available within its `banner' which
is displayed as session preamble and available through either its manpage
(BANNER section) or the short option `-V'.
update-alternatives(8) is used to select the default variant: you want to type
$ update-alternatives --display evolver
to display information about the involved link group.
The paths `/usr/share/doc/evolver-doc/html' and `/usr/share/doc/evolver-doc/examples'
are appended by default (in that order) to the environment variable EVOLVERPATH
which is meant to contain a colon-separated list of paths automatically
searched for datafiles, included files, and on-line help contents (evolver(1)).
The content of these folders is provided within the Debian package evolver-doc,
as expected. This appending default behaviour can be cancelled by appending at
least three consecutive colons (":::") to the environment variable EVOLVERPATH.
Each evolver front-end variant is compiled against the readline(3) library:
the history list is stored in `~/.evolver_history'.
This very README.Debian file is part of the Debian package evolver-ogl
which provides the `ogl' flavour variants.
-- Jerome Benoit <calculus@rezozer.net> Thu, 28 Jul 2016 00:13:11 +0000
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