50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
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/**********************************************************************
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*
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* GEOS - Geometry Engine Open Source
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* http://geos.osgeo.org
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*
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* Copyright (C) 2022 ISciences LLC
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*
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* This is free software; you can redistribute and/or modify it under
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* the terms of the GNU Lesser General Public Licence as published
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* by the Free Software Foundation.
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* See the COPYING file for more information.
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*
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**********************************************************************/
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#pragma once
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#include <geos/export.h>
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#include <geos/geom/Geometry.h>
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#include <geos/operation/cluster/DisjointOperation.h>
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#include <geos/operation/cluster/GeometryIntersectsClusterFinder.h>
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#include <geos/operation/overlayng/OverlayNGRobust.h>
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namespace geos {
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namespace operation {
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namespace geounion {
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class GEOS_DLL DisjointSubsetUnion {
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public:
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/** Perform a unary union on a geometry by combining the results of
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* unary unions performed on its disjoint subsets.
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*
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* @brief Union
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* @param g the geometry to union
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* @return result geometry
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*/
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static std::unique_ptr<geom::Geometry> Union(const geom::Geometry* g) {
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operation::cluster::GeometryIntersectsClusterFinder f;
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operation::cluster::DisjointOperation op(f);
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op.setSplitInputs(true);
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return op.processDisjointSubsets(*g, [](const geom::Geometry& subset) {
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return subset.Union();
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});
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}
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};
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}
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}
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}
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