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77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
3 weeks ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkPolygonBuilder.h
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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/**
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* @class vtkPolygonBuilder
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*
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*
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* The polygon output is the boundary of the union of the triangles.
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* It is assumed that the input triangles form a simple polygon. It is
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* currently used to compute polygons for slicing.
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*
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*/
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#ifndef vtkPolygonBuilder_h
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#define vtkPolygonBuilder_h
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#include "vtkCommonMiscModule.h" // For export macro
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#include "vtkIdList.h"
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#include "vtkObject.h"
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#include "vtkType.h" //for basic types
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#include <cstddef> //for size_t
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#include <map> //for private data members
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#include <utility> //for private data members
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#include <vector> // for private data members
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class vtkIdListCollection;
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class VTKCOMMONMISC_EXPORT vtkPolygonBuilder
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{
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public:
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vtkPolygonBuilder();
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/**
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* Insert a triangle as a triplet of point IDs.
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*/
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void InsertTriangle(const vtkIdType* abc);
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/**
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* Populate polys with lists of polygons, defined as sequential external
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* vertices. It is the responsibility of the user to delete these generated
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* lists in order to avoid memory leaks.
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*/
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void GetPolygons(vtkIdListCollection* polys);
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/**
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* Prepare the builder for a new set of inputs.
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*/
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void Reset();
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private:
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typedef std::pair<vtkIdType, vtkIdType> Edge;
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typedef std::map<Edge, size_t> EdgeHistogram;
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typedef std::multimap<vtkIdType, vtkIdType> EdgeMap;
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typedef std::vector<vtkIdType> Triangle;
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typedef std::vector<Triangle> Triangles;
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typedef std::map<vtkIdType, Triangles> TriangleMap;
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TriangleMap Tris;
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EdgeHistogram EdgeCounter;
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EdgeMap Edges;
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};
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#endif
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// VTK-HeaderTest-Exclude: vtkPolygonBuilder.h
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