C++ (Cpp) MultiPolygon::push_back Examples

Example #1

File: intersects.cpp Project: bstrong/boost-mirror

inline void make_polygon(MultiPolygon& mp, int count_x, int count_y, int index, int width_x)
{
    typedef typename bg::point_type<MultiPolygon>::type point_type;

    for(int j = 0; j < count_x; ++j)
    {
        for(int k = 0; k < count_y; ++k)
        {
            mp.push_back(MultiPolygon::value_type());
            mp.back().outer().push_back(point_type(width_x + j * 10 + 1, k * 10 + 1));
            mp.back().outer().push_back(point_type(width_x + j * 10 + width_x, k * 10 + 5 + index));
            mp.back().outer().push_back(point_type(width_x + j * 10 + 5 + index, k * 10 + 7));
            mp.back().outer().push_back(point_type(width_x + j * 10 + 1, k * 10 + 1));
        }
    }
}

Example #2

File: intersection_pies.cpp Project: LancelotGHX/Simula

inline void holify_multi(MultiPolygon& multi_polygon)
{
    typedef typename bg::point_type<MultiPolygon>::type point_type;

    typename boost::range_value<MultiPolygon>::type p;

    bg::exterior_ring(p).push_back(bg::make<point_type>(0, 0));
    bg::exterior_ring(p).push_back(bg::make<point_type>(0, 5000));
    bg::exterior_ring(p).push_back(bg::make<point_type>(5000, 5000));
    bg::exterior_ring(p).push_back(bg::make<point_type>(5000, 0));
    bg::exterior_ring(p).push_back(bg::make<point_type>(0, 0));

    for (int i = 0; i < multi_polygon.size(); i++)
    {
        bg::interior_rings(p).push_back(bg::exterior_ring(multi_polygon[i]));
    }

    bg::correct(p);

    multi_polygon.clear();
    multi_polygon.push_back(p);
}

Example #3

File: geometry_tile.cpp Project: calendreco/mapbox-gl-native

static Feature::geometry_type convertGeometry(const GeometryTileFeature& geometryTileFeature, const CanonicalTileID& tileID) {
    const double size = util::EXTENT * std::pow(2, tileID.z);
    const double x0 = util::EXTENT * tileID.x;
    const double y0 = util::EXTENT * tileID.y;

    auto tileCoordinatesToLatLng = [&] (const Point<int16_t>& p) {
        double y2 = 180 - (p.y + y0) * 360 / size;
        return Point<double>(
            (p.x + x0) * 360 / size - 180,
            360.0 / M_PI * std::atan(std::exp(y2 * M_PI / 180)) - 90.0
        );
    };

    GeometryCollection geometries = geometryTileFeature.getGeometries();

    switch (geometryTileFeature.getType()) {
        case FeatureType::Unknown: {
            assert(false);
            return Point<double>(NAN, NAN);
        }

        case FeatureType::Point: {
            MultiPoint<double> multiPoint;
            for (const auto& p : geometries.at(0)) {
                multiPoint.push_back(tileCoordinatesToLatLng(p));
            }
            if (multiPoint.size() == 1) {
                return multiPoint[0];
            } else {
                return multiPoint;
            }
        }

        case FeatureType::LineString: {
            MultiLineString<double> multiLineString;
            for (const auto& g : geometries) {
                LineString<double> lineString;
                for (const auto& p : g) {
                    lineString.push_back(tileCoordinatesToLatLng(p));
                }
                multiLineString.push_back(std::move(lineString));
            }
            if (multiLineString.size() == 1) {
                return multiLineString[0];
            } else {
                return multiLineString;
            }
        }

        case FeatureType::Polygon: {
            MultiPolygon<double> multiPolygon;
            for (const auto& pg : classifyRings(geometries)) {
                Polygon<double> polygon;
                for (const auto& r : pg) {
                    LinearRing<double> linearRing;
                    for (const auto& p : r) {
                        linearRing.push_back(tileCoordinatesToLatLng(p));
                    }
                    polygon.push_back(std::move(linearRing));
                }
                multiPolygon.push_back(std::move(polygon));
            }
            if (multiPolygon.size() == 1) {
                return multiPolygon[0];
            } else {
                return multiPolygon;
            }
        }
    }

    // Unreachable, but placate GCC.
    return Point<double>();
}