70 lines
2.9 KiB
C++
70 lines
2.9 KiB
C++
/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2000, 2010 Oracle and/or its affiliates.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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#ifndef _CHART2_CLIPPING_HXX
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#define _CHART2_CLIPPING_HXX
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#include <basegfx/range/b2drectangle.hxx>
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#include <com/sun/star/drawing/PolyPolygonShape3D.hpp>
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//.............................................................................
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namespace chart
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{
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//.............................................................................
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//-----------------------------------------------------------------------------
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/**
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*/
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class Clipping
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{
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/** This class uses the Liang-Biarsky parametric line-clipping algorithm as described in:
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Computer Graphics: principles and practice, 2nd ed.,
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James D. Foley et al.,
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Section 3.12.4 on page 117.
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*/
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public:
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/** @descr The intersection between an open polygon and a rectangle is
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calculated and the resulting lines are placed into the poly-polygon aResult.
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@param rPolygon The polygon is required to be open, ie. it's start and end point
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have different coordinates and that it is continuous, ie. has no holes.
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@param rRectangle The clipping area.
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@param aResult The resulting lines that are the parts of the given polygon lying inside
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the clipping area are stored into aResult whose prior content is deleted first.
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*/
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static void clipPolygonAtRectangle(
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const ::com::sun::star::drawing::PolyPolygonShape3D& rPolygon
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, const ::basegfx::B2DRectangle& rRectangle
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, ::com::sun::star::drawing::PolyPolygonShape3D& aResult
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, bool bSplitPiecesToDifferentPolygons = true );
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};
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//.............................................................................
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} //namespace chart
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//.............................................................................
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#endif
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