Region.cc

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/*
 * This file is part of sphgeom.
 *
 * Developed for the LSST Data Management System.
 * This product includes software developed by the LSST Project
 * (http://www.lsst.org).
 * See the COPYRIGHT file at the top-level directory of this distribution
 * for details of code ownership.
 *
 * This software is dual licensed under the GNU General Public License and also
 * under a 3-clause BSD license. Recipients may choose which of these licenses
 * to use; please see the files gpl-3.0.txt and/or bsd_license.txt,
 * respectively.  If you choose the GPL option then the following text applies
 * (but note that there is still no warranty even if you opt for BSD instead):
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 
#include <stdexcept>
 
#include "lsst/sphgeom/Region.h"
 
#include "lsst/sphgeom/Box.h"
#include "lsst/sphgeom/Circle.h"
#include "lsst/sphgeom/ConvexPolygon.h"
#include "lsst/sphgeom/Ellipse.h"
#include "lsst/sphgeom/CompoundRegion.h"
#include "lsst/sphgeom/UnitVector3d.h"
 
namespace lsst {
namespace sphgeom {
 
bool Region::contains(double x, double y, double z) const {
    return contains(UnitVector3d(x, y, z));
}
 
bool Region::contains(double lon, double lat) const {
    return contains(UnitVector3d(LonLat::fromRadians(lon, lat)));
}
 
std::unique_ptr<Region> Region::decode(std::uint8_t const * buffer, size_t n) {
    if (buffer == nullptr || n == 0) {
        throw std::runtime_error("Byte-string is not an encoded Region");
    }
    std::uint8_t type = *buffer;
    if (type == Box::TYPE_CODE) {
        return Box::decode(buffer, n);
    } else if (type == Circle::TYPE_CODE) {
        return Circle::decode(buffer, n);
    } else if (type == ConvexPolygon::TYPE_CODE) {
        return ConvexPolygon::decode(buffer, n);
    } else if (type == Ellipse::TYPE_CODE) {
        return Ellipse::decode(buffer, n);
    } else if (type == UnionRegion::TYPE_CODE) {
        return UnionRegion::decode(buffer, n);
    } else if (type == IntersectionRegion::TYPE_CODE) {
        return IntersectionRegion::decode(buffer, n);
    }
    throw std::runtime_error("Byte-string is not an encoded Region");
}
 
std::vector<std::unique_ptr<Region>> Region::getRegions(Region const &region) {
    std::vector<std::unique_ptr<Region>> result;
    if (auto union_region = dynamic_cast<UnionRegion const *>(&region)) {
        for(int i = 0; i < 2; ++i) {
            result.emplace_back(union_region->getOperand(i).clone());
        }
    } else if(auto intersection_region = dynamic_cast<IntersectionRegion const *>(&region)) {
        for(int i = 0; i < 2; ++i) {
            intersection_region->getOperand(i);
            result.emplace_back(intersection_region->getOperand(i).clone());
        }
    } else {
        result.emplace_back(region.clone());
    }
    return result;
}
 
}} // namespace lsst:sphgeom