89 lines
2.5 KiB
C
89 lines
2.5 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) 2005-2006 Refractions Research Inc.
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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 <memory>
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// Forward declarations
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namespace geos {
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namespace geom {
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class PrecisionModel;
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class Geometry;
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}
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}
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namespace geos {
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namespace precision { // geos.precision
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/** \brief
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* Reduces the precision of a {@link geom::Geometry}
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* according to the supplied {@link geom::PrecisionModel}, without
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* attempting to preserve valid topology.
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*
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* The topology of the resulting geometry may be invalid if
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* topological collapse occurs due to coordinates being shifted.
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* It is up to the client to check this and handle it if necessary.
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* Collapses may not matter for some uses. An example
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* is simplifying the input to the buffer algorithm.
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* The buffer algorithm does not depend on the validity of the input geometry.
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*
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*/
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class GEOS_DLL SimpleGeometryPrecisionReducer {
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private:
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const geom::PrecisionModel* newPrecisionModel;
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bool removeCollapsed;
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//bool changePrecisionModel;
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public:
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SimpleGeometryPrecisionReducer(const geom::PrecisionModel* pm);
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/**
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* Sets whether the reduction will result in collapsed components
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* being removed completely, or simply being collapsed to an (invalid)
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* Geometry of the same type.
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*
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* @param nRemoveCollapsed if <code>true</code> collapsed
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* components will be removed
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*/
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void setRemoveCollapsedComponents(bool nRemoveCollapsed);
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/*
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* Sets whether the {@link PrecisionModel} of the new reduced Geometry
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* will be changed to be the {@link PrecisionModel} supplied to
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* specify the reduction. The default is to not change the
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* precision model
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*
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* @param changePrecisionModel if <code>true</code> the precision
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* model of the created Geometry will be the
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* the precisionModel supplied in the constructor.
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*/
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//void setChangePrecisionModel(bool nChangePrecisionModel);
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const geom::PrecisionModel* getPrecisionModel();
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bool getRemoveCollapsed();
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std::unique_ptr<geom::Geometry> reduce(const geom::Geometry* geom);
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};
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} // namespace geos.precision
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} // namespace geos
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