The installation process is described in the "INSTALL" file and 
the licensing information, applicable to T2 Viewer, can be found
in the "LICENSE.GPL" file.

Learning through examples:
==========================

A good way to get acquainted with T2 Viewer features, provided by
its programming interface, is by studying the examples available in
<T2 Viewer directory>/examples. Those examples explore several
different characteristics of the viewer, as well as of the
oriented projective plane.


Creating makefiles for applications that use T2 Viewer:
=======================================================

Just as a regular CGAL application, it is convenient to create makefiles
to compile those CGAL applications that use T2 Viewer. The only change is
the parameter "-v" that should be appended to the call to the
"create_makefile" script (as in: "create_makefile -v").


Numerical data types supported by T2 Viewer:
============================================

int
float
double
MP_Float
Quotient<int>
Quotient<float>
Quotient<double>
Quotient<MP_Float>


Current limitations and known bugs (yet to be fixed):
=====================================================

The current version (1.20050628) of T2 Viewer allows for clicking and dragging
to move primitives on the screen.

However, due to a limitation on the current implementation (20050628) of the
extension of CGAL to the oriented projective plane, T2, only points can be
moved.

There is an implementation error on the aforementioned extension of CGAL,
that may cause moving points on the spherical model to produce unexpected
results when crossing the line at infinity.

-- Fabio Pakk Selmi-Dei