- Qt 5.15
- Qt Location
- Clipper Polygon Clipping Library, version 6.4.0
- Qt 5.15.11 Reference Documentation

# Clipper Polygon Clipping Library, version 6.4.0

The Clipper library performs line & polygon clipping - intersection, union, difference & exclusive-or, and line & polygon offsetting.

Used in the QML plugin of Qt Location.

The sources can be found in work/qtlocation-everywhere-src-5.15.11/src/3rdparty/clipper.

Project Homepage, upstream version: 6.4.0

     Copyright Angus Johnson 2010-2015

Boost Software License 1.0.

     Use, modification & distribution is subject to Boost Software License Ver 1.
     http://www.boost.org/LICENSE_1_0.txt

     Attributions:
     The code in this library is an extension of Bala Vatti's clipping algorithm:
     "A generic solution to polygon clipping"
     Communications of the ACM, Vol 35, Issue 7 (July 1992) pp 56-63.
     http://portal.acm.org/citation.cfm?id=129906

     Computer graphics and geometric modeling: implementation and algorithms
     By Max K. Agoston
     Springer; 1 edition (January 4, 2005)
     http://books.google.com/books?q=vatti+clipping+agoston

     See also:
     "Polygon Offsetting by Computing Winding Numbers"
     Paper no. DETC2005-85513 pp. 565-575
     ASME 2005 International Design Engineering Technical Conferences
     and Computers and Information in Engineering Conference (IDETC/CIE2005)
     September 24-28, 2005 , Long Beach, California, USA
     http://www.me.berkeley.edu/~mcmains/pubs/DAC05OffsetPolygon.pdf

     Boost Software License - Version 1.0 - August 17th, 2003
     http://www.boost.org/LICENSE_1_0.txt

     Permission is hereby granted, free of charge, to any person or organization
     obtaining a copy of the software and accompanying documentation covered by
     this license (the "Software") to use, reproduce, display, distribute,
     execute, and transmit the Software, and to prepare derivative works of the
     Software, and to permit third-parties to whom the Software is furnished to
     do so, all subject to the following:

     The copyright notices in the Software and this entire statement, including
     the above license grant, this restriction and the following disclaimer,
     must be included in all copies of the Software, in whole or in part, and
     all derivative works of the Software, unless such copies or derivative
     works are solely in the form of machine-executable object code generated by
     a source language processor.

     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
     SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
     FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
     ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     DEALINGS IN THE SOFTWARE.