61 lines
2.7 KiB
C++
61 lines
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#pragma once
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#include <basegfx/range/b2drectangle.hxx>
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namespace com::sun::star::drawing { struct PolyPolygonShape3D; }
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namespace com::sun::star::drawing { struct Position3D; }
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namespace chart
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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. its 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 css::drawing::PolyPolygonShape3D& rPolygon
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, const ::basegfx::B2DRectangle& rRectangle
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, css::drawing::PolyPolygonShape3D& aResult
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, bool bSplitPiecesToDifferentPolygons = true );
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static void clipPolygonAtRectangle(
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const std::vector<std::vector<css::drawing::Position3D>>& rPolygon
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, const ::basegfx::B2DRectangle& rRectangle
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, std::vector<std::vector<css::drawing::Position3D>>& aResult
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, bool bSplitPiecesToDifferentPolygons = true );
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};
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} //namespace chart
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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