1 /************************************************************************* 2 * 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * Copyright 2000, 2010 Oracle and/or its affiliates. 6 * 7 * OpenOffice.org - a multi-platform office productivity suite 8 * 9 * This file is part of OpenOffice.org. 10 * 11 * OpenOffice.org is free software: you can redistribute it and/or modify 12 * it under the terms of the GNU Lesser General Public License version 3 13 * only, as published by the Free Software Foundation. 14 * 15 * OpenOffice.org is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU Lesser General Public License version 3 for more details 19 * (a copy is included in the LICENSE file that accompanied this code). 20 * 21 * You should have received a copy of the GNU Lesser General Public License 22 * version 3 along with OpenOffice.org. If not, see 23 * <http://www.openoffice.org/license.html> 24 * for a copy of the LGPLv3 License. 25 * 26 ************************************************************************/ 27 28 #ifndef _CHART2_CLIPPING_HXX 29 #define _CHART2_CLIPPING_HXX 30 31 #include <basegfx/range/b2drectangle.hxx> 32 #include <com/sun/star/drawing/PolyPolygonShape3D.hpp> 33 34 //............................................................................. 35 namespace chart 36 { 37 //............................................................................. 38 39 //----------------------------------------------------------------------------- 40 /** 41 */ 42 43 class Clipping 44 { 45 /** This class uses the Liang-Biarsky parametric line-clipping algorithm as described in: 46 Computer Graphics: principles and practice, 2nd ed., 47 James D. Foley et al., 48 Section 3.12.4 on page 117. 49 */ 50 51 public: 52 /** @descr The intersection between an open polygon and a rectangle is 53 calculated and the resulting lines are placed into the poly-polygon aResult. 54 @param rPolygon The polygon is required to be open, ie. it's start and end point 55 have different coordinates and that it is continuous, ie. has no holes. 56 @param rRectangle The clipping area. 57 @param aResult The resulting lines that are the parts of the given polygon lying inside 58 the clipping area are stored into aResult whose prior content is deleted first. 59 */ 60 static void clipPolygonAtRectangle( 61 const ::com::sun::star::drawing::PolyPolygonShape3D& rPolygon 62 , const ::basegfx::B2DRectangle& rRectangle 63 , ::com::sun::star::drawing::PolyPolygonShape3D& aResult 64 , bool bSplitPiecesToDifferentPolygons = true ); 65 }; 66 67 //............................................................................. 68 } //namespace chart 69 //............................................................................. 70 #endif 71