NAME

       libspiro - A clothoid to bezier spline converter

SYNOPSIS

       #include <spiroentrypoints.h> and then compile and link with -lspiro

DESCRIPTION

       Spiro library for curve design which simplifies drawing of beautiful curves.

       libspiro  takes  an  array  of  spiro  control points which can be easier for an artist to
       create and modify, and then converts these into a series of bezier splines which can  then
       be used in the myriad of ways the world has come to use beziers.

       spiroentrypoints.h  has  technical information on how to connect with libspiro and further
       information and example code can be found at http://github.com/fontforge/libspiro

REPORTING PROBLEMS

       Before reporting a problem, please check the libspiro web site to verify that you have the
       latest version of libspiro

       Great  care  was taken to maintain backwards compatibility so it is recommended to upgrade
       if you experience problems with earlier libspiro versions.

LIBSPIRO LICENSE

       libspiro originated from spiro code (in 2007) found in ppedit which  is  a  pattern  plate
       editor for Spiro splines.  ppedit was/is Copyright (C) 2007 Raph Levien. GNU GPL version 2
       or higher.  ppedit was later relicensed also as Apache-2 MIT code in May  of  2019.   This
       relicensing  is fine since all ppedit was written by Raph Levien in 2007. Copyright allows
       for this.  Unfortunately, this  re-licensing  of  ppedit  has  caused  some  confusion  in
       assuming  that  this  relicensing also applies to libspiro which is not valid and does not
       apply.

       libspiro was based on ppedit spiro code from 2007 (which was GNU GPL2 version 2 or higher)
       and  built  into  a  usable library at http://libspiro.sourceforge.net/ Copyright (C) 2007
       George Williams. GNU GPL version 2 or higher.  This license also applies to  the  included
       Java files which have been forked into javascript and typeset files seen elsewhere.

       libspiro  was  later  picked  up  in  2013  and  continued  with  further  development and
       improvements at http://github.com/fontforge/libspiro

       libspiro is now Copyright (C) 2013... as GNU GPL version 3 or higher.

AUTHORS

       Please see AUTHORS file for everyone involved in creating and improving this libspiro

       Further details (on why and what) can also be seen in git history as well as the Changelog
       and README files.

                                           2022-Jul-22                                   SPIRO(3)