| /************************************************************** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the 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 |
