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90 lines
2.8 KiB
C++
90 lines
2.8 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2025 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef MAPNIK_MARKERS_PLACEMENTS_INTERIOR_HPP
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#define MAPNIK_MARKERS_PLACEMENTS_INTERIOR_HPP
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#include <mapnik/markers_placements/point.hpp>
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#include <mapnik/geom_util.hpp>
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#include <mapnik/geometry/geometry_types.hpp>
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#include <mapnik/geometry/interior.hpp>
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#include <mapnik/geometry/polygon_vertex_processor.hpp>
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namespace mapnik {
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template<typename Locator, typename Detector>
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class markers_interior_placement : public markers_point_placement<Locator, Detector>
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{
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public:
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using point_placement = markers_point_placement<Locator, Detector>;
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using point_placement::point_placement;
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bool get_point(double& x, double& y, double& angle, bool ignore_placement)
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{
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if (this->done_)
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{
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return false;
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}
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if (this->locator_.type() == geometry::geometry_types::Point)
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{
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return point_placement::get_point(x, y, angle, ignore_placement);
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}
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if (this->locator_.type() == geometry::geometry_types::LineString)
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{
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if (!label::middle_point(this->locator_, x, y))
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{
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this->done_ = true;
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return false;
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}
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}
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else
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{
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geometry::polygon_vertex_processor<double> vertex_processor;
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vertex_processor.add_path(this->locator_);
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geometry::point<double> placement;
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if (!geometry::interior(vertex_processor.polygon_, this->params_.scale_factor, placement))
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{
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this->done_ = true;
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return false;
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}
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x = placement.x;
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y = placement.y;
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}
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angle = 0;
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if (!this->push_to_detector(x, y, angle, ignore_placement))
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{
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return false;
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}
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this->done_ = true;
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return true;
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}
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};
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} // namespace mapnik
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#endif // MAPNIK_MARKERS_PLACEMENTS_INTERIOR_HPP
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