![]() |
C++ API DOCUMENTATION |
00001 /***************************************************************************** 00002 * 00003 * This file is part of Mapnik (c++ mapping toolkit) 00004 * 00005 * Copyright (C) 2006 Artem Pavlenko 00006 * 00007 * This library is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * This library is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with this library; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 00020 * 00021 *****************************************************************************/ 00022 00023 //$Id$ 00024 00025 #ifndef HIT_TEST_FILTER_HPP 00026 #define HIT_TEST_FILTER_HPP 00027 00028 #include <mapnik/feature.hpp> 00029 00030 namespace mapnik { 00031 class hit_test_filter 00032 { 00033 public: 00034 hit_test_filter(double x, double y, double tol) 00035 : x_(x), 00036 y_(y), 00037 tol_(tol) {} 00038 00039 bool pass(Feature const& feature) 00040 { 00041 for (unsigned i=0;i<feature.num_geometries();++i) 00042 { 00043 geometry2d const& geom = feature.get_geometry(i); 00044 if (geom.hit_test(x_,y_,tol_)) 00045 return true; 00046 } 00047 return false; 00048 } 00049 00050 private: 00051 double x_; 00052 double y_; 00053 double tol_; 00054 }; 00055 } 00056 00057 #endif // HIT_TEST_FILTER_HPP