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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#ifndef _CHART2_CLIPPING_HXX
#define _CHART2_CLIPPING_HXX
#include <basegfx/range/b2drectangle.hxx>
#include <com/sun/star/drawing/PolyPolygonShape3D.hpp>
//.............................................................................
namespace chart
{
//.............................................................................
//-----------------------------------------------------------------------------
/**
*/
class Clipping
{
/** This class uses the Liang-Biarsky parametric line-clipping algorithm as described in:
Computer Graphics: principles and practice, 2nd ed.,
James D. Foley et al.,
Section 3.12.4 on page 117.
*/
public:
/** @descr The intersection between an open polygon and a rectangle is
calculated and the resulting lines are placed into the poly-polygon aResult.
@param rPolygon The polygon is required to be open, ie. it's start and end point
have different coordinates and that it is continuous, ie. has no holes.
@param rRectangle The clipping area.
@param aResult The resulting lines that are the parts of the given polygon lying inside
the clipping area are stored into aResult whose prior content is deleted first.
*/
static void clipPolygonAtRectangle(
const ::com::sun::star::drawing::PolyPolygonShape3D& rPolygon
, const ::basegfx::B2DRectangle& rRectangle
, ::com::sun::star::drawing::PolyPolygonShape3D& aResult
, bool bSplitPiecesToDifferentPolygons = true );
};
//.............................................................................
} //namespace chart
//.............................................................................
#endif
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