// Boost.Geometry (aka GGL, Generic Geometry Library) // QuickBook Example // Copyright (c) 2013 Barend Gehrels, Amsterdam, the Netherlands. // Use, modification and distribution is subject to the Boost Software License, // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) //[svg_mapper //` Shows the usage of svg_mapper #include <iostream> #include <fstream> #include <boost/geometry.hpp> #include <boost/geometry/geometries/point_xy.hpp> #include <boost/geometry/geometries/polygon.hpp> int main() { // Specify the basic type typedef boost::geometry::model::d2::point_xy<double> point_type; // Declare some geometries and set their values point_type a; boost::geometry::assign_values(a, 3, 6); boost::geometry::model::polygon<point_type> b; boost::geometry::read_wkt("POLYGON((0 0,0 7,4 2,2 0,0 0))", b); boost::geometry::model::linestring<point_type> c; c.push_back(point_type(3, 4)); c.push_back(point_type(4, 5)); // Declare a stream and an SVG mapper std::ofstream svg("my_map.svg"); boost::geometry::svg_mapper<point_type> mapper(svg, 400, 400); // Add geometries such that all these geometries fit on the map mapper.add(a); mapper.add(b); mapper.add(c); // Draw the geometries on the SVG map, using a specific SVG style mapper.map(a, "fill-opacity:0.5;fill:rgb(153,204,0);stroke:rgb(153,204,0);stroke-width:2", 5); mapper.map(b, "fill-opacity:0.3;fill:rgb(51,51,153);stroke:rgb(51,51,153);stroke-width:2"); mapper.map(c, "opacity:0.4;fill:none;stroke:rgb(212,0,0);stroke-width:5"); // Destructor of map will be called - adding </svg> // Destructor of stream will be called, closing the file return 0; } //] //[svg_mapper_output /*` Output: [$img/io/svg_mapper.png] */ //]