.. _program_listing_file__tmp_ws_src_marti_common_swri_geometry_util_include_swri_geometry_util_intersection.h:

Program Listing for File intersection.h
=======================================

|exhale_lsh| :ref:`Return to documentation for file <file__tmp_ws_src_marti_common_swri_geometry_util_include_swri_geometry_util_intersection.h>` (``/tmp/ws/src/marti_common/swri_geometry_util/include/swri_geometry_util/intersection.h``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   // *****************************************************************************
   //
   // Copyright (c) 2014, Southwest Research Institute® (SwRI®)
   // All rights reserved.
   //
   // Redistribution and use in source and binary forms, with or without
   // modification, are permitted provided that the following conditions are met:
   //     * Redistributions of source code must retain the above copyright
   //       notice, this list of conditions and the following disclaimer.
   //     * Redistributions in binary form must reproduce the above copyright
   //       notice, this list of conditions and the following disclaimer in the
   //       documentation and/or other materials provided with the distribution.
   //     * Neither the name of Southwest Research Institute® (SwRI®) nor the
   //       names of its contributors may be used to endorse or promote products
   //       derived from this software without specific prior written permission.
   //
   // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   // ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
   // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   // ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   //
   // *****************************************************************************
   
   #ifndef SWRI_GEOMETRY_UTIL_INTERSECTION_H_
   #define SWRI_GEOMETRY_UTIL_INTERSECTION_H_
   
   #include <vector>
   #include <opencv2/core/core.hpp>
   
   #define HAVE_INT64_T_64  # Prevents conflict with OpenCV typedef of int64
   #include <geos_c.h>
   #undef HAVE_INT64_T_64
   
   namespace swri_geometry_util
   {
     GEOSContextHandle_t GetContext();
   
     bool LineIntersection(
         const cv::Vec2d& p1,
         const cv::Vec2d& p2,
         const cv::Vec2d& p3,
         const cv::Vec2d& p4,
         cv::Vec2d& c);
   
     bool LineSegmentIntersection(
         const cv::Vec2d& p1,
         const cv::Vec2d& p2,
         const cv::Vec2d& p3,
         const cv::Vec2d& p4,
         cv::Vec2d& c);
   
     bool PointOnLineSegment(
         const cv::Vec2d& p1,
         const cv::Vec2d& p2,
         const cv::Vec2d& p3);
   
     bool PolygonsIntersect(
         const std::vector<cv::Vec2d>& a,
         const std::vector<cv::Vec2d>& b);
   
     bool PolygonsIntersect(
         const std::vector<cv::Vec2d>& a,
         const std::vector<cv::Vec2d>& b,
         GEOSContextHandle_t& ctx);
   
     double PolygonIntersectionArea(
         const std::vector<cv::Vec2d>& a,
         const std::vector<cv::Vec2d>& b);
   
     double PolygonIntersectionArea(
         const std::vector<cv::Vec2d>& a,
         const std::vector<cv::Vec2d>& b,
         GEOSContextHandle_t& ctx);
   
     void ReleaseContext(GEOSContextHandle_t&  ctx);
   }
   
   #endif