The Clipper library performs line & polygon clipping - intersection, union, difference & exclusive-or, and line & polygon offsetting.
Used in the QML plugin of Qt Location and in Qt Positioning.
The sources can be found in qt5/qtlocation/src/3rdparty/clipper.
工项首页 , upstream version: 6.4.2
Copyright Angus Johnson 2010-2017
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 另请参阅： "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.
