| // Boost.Geometry (aka GGL, Generic Geometry Library) |
| // QuickBook Example |
| |
| // Copyright (c) 2011-2012 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) |
| |
| //[transform |
| //` Shows how points can be transformed using the default strategy |
| |
| #include <iostream> |
| #include <boost/geometry.hpp> |
| |
| |
| int main() |
| { |
| namespace bg = boost::geometry; |
| |
| // Select a point near the pole (theta=5.0, phi=15.0) |
| bg::model::point<long double, 2, bg::cs::spherical<bg::degree> > p1(15.0, 5.0); |
| |
| // Transform from degree to radian. Default strategy is automatically selected, |
| // it will convert from degree to radian |
| bg::model::point<long double, 2, bg::cs::spherical<bg::radian> > p2; |
| bg::transform(p1, p2); |
| |
| // Transform from degree (lon-lat) to 3D (x,y,z). Default strategy is automatically selected, |
| // it will consider points on a unit sphere |
| bg::model::point<long double, 3, bg::cs::cartesian> p3; |
| bg::transform(p1, p3); |
| |
| std::cout |
| << "p1: " << bg::dsv(p1) << std::endl |
| << "p2: " << bg::dsv(p2) << std::endl |
| << "p3: " << bg::dsv(p3) << std::endl; |
| |
| return 0; |
| } |
| |
| //] |
| |
| |
| //[transform_output |
| /*` |
| Output: |
| [pre |
| p1: (15, 5) |
| p2: (0.261799, 0.0872665) |
| p3: (0.084186, 0.0225576, 0.996195) |
| ] |
| */ |
| //] |
