97 lines
2.9 KiB
C++
97 lines
2.9 KiB
C++
// Geometric Tools, LLC
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// Copyright (c) 1998-2010
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// Distributed under the Boost Software License, Version 1.0.
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// http://www.boost.org/LICENSE_1_0.txt
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// http://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
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//
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// File Version: 4.10.0 (2009/11/18)
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#ifndef WM4CONVEXHULL2_H
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#define WM4CONVEXHULL2_H
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#include "Wm4FoundationLIB.h"
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#include "Wm4ConvexHull1.h"
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#include "Wm4Query2.h"
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namespace Wm4
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{
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template <class Real>
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class WM4_FOUNDATION_ITEM ConvexHull2 : public ConvexHull<Real>
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{
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public:
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// The input to the constructor is the array of vertices whose convex hull
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// is required. If you want ConvexHull2 to delete the vertices during
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// destruction, set bOwner to 'true'. Otherwise, you own the vertices and
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// must delete them yourself.
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//
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// You have a choice of speed versus accuracy. The fastest choice is
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// Query::QT_INT64, but it gives up a lot of precision, scaling the points
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// to [0,2^{20}]^3. The choice Query::QT_INTEGER gives up less precision,
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// scaling the points to [0,2^{24}]^3. The choice Query::QT_RATIONAL uses
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// exact arithmetic, but is the slowest choice. The choice Query::QT_REAL
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// uses floating-point arithmetic, but is not robust in all cases.
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ConvexHull2 (int iVertexQuantity, Vector2<Real>* akVertex, Real fEpsilon,
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bool bOwner, Query::Type eQueryType);
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virtual ~ConvexHull2 ();
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// If GetDimension() returns 1, then the points lie on a line. You must
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// create a ConvexHull1 object using the function provided.
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const Vector2<Real>& GetLineOrigin () const;
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const Vector2<Real>& GetLineDirection () const;
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ConvexHull1<Real>* GetConvexHull1 () const;
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private:
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using ConvexHull<Real>::m_eQueryType;
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using ConvexHull<Real>::m_iVertexQuantity;
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using ConvexHull<Real>::m_iDimension;
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using ConvexHull<Real>::m_iSimplexQuantity;
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using ConvexHull<Real>::m_aiIndex;
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using ConvexHull<Real>::m_fEpsilon;
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using ConvexHull<Real>::m_bOwner;
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class WM4_FOUNDATION_ITEM Edge
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{
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public:
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Edge (int iV0, int iV1);
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int GetSign (int i, const Query2<Real>* pkQuery);
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void Insert (Edge* pkAdj0, Edge* pkAdj1);
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void DeleteSelf ();
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void DeleteAll ();
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void GetIndices (int& riHQuantity, int*& raiHIndex);
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int V[2];
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Edge* A[2];
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int Sign;
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int Time;
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};
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// Support for streaming to/from disk.
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ConvexHull2 (const char* acFilename);
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bool Load (const char* acFilename);
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bool Save (const char* acFilename) const;
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bool Update (Edge*& rpkHull, int i);
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// The input points.
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Vector2<Real>* m_akVertex;
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// Support for robust queries.
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Vector2<Real>* m_akSVertex;
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Query2<Real>* m_pkQuery;
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// The line of containment if the dimension is 1.
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Vector2<Real> m_kLineOrigin, m_kLineDirection;
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};
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typedef ConvexHull2<float> ConvexHull2f;
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typedef ConvexHull2<double> ConvexHull2d;
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}
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#endif
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