libgofigure-dev 0.9.0-3+b1 / usr / include / gofigure2 / SparseMatrix.h

/*=========================================================================
 Authors: Michael Kazhdan and Matthew Bolitho
 at Johns Hopkins University, 2006-10

 Copyright (c) 2006-10, Michael Kazhdan and Matthew Bolitho,
 Johns Hopkins University.
 All rights reserved.

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 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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=========================================================================*/

#ifndef __SPARSEMATRIX_HPP
#define __SPARSEMATRIX_HPP

#include "Vector.h"
#include "Allocator.h"

template< class T >
struct MatrixEntry {
  MatrixEntry(void)             { N = -1; Value = 0; }
  MatrixEntry(int i)    { N = i; Value = 0; }
  int N;
  T Value;
};
template< class T, int Dim >
struct NMatrixEntry {
  NMatrixEntry(void)            { N = -1; memset(Value, 0, sizeof( T ) * Dim); }
  NMatrixEntry(int i)   { N = i; memset(Value, 0, sizeof( T ) * Dim); }
  int N;
  T Value[Dim];
};

template< class T >
class SparseMatrix
{
private:
  static int UseAlloc;
public:
  static Allocator< MatrixEntry< T > > MatrixAllocator;
  static int UseAllocator(void);

  static void SetAllocator(const int & blockSize);

  int rows;
  int *rowSizes;
  MatrixEntry< T > **m_ppElements;

  SparseMatrix();
  SparseMatrix(int rows);
  void Resize(int rows);

  void SetRowSize(int row, int count);

  int Entries(void);

  SparseMatrix(const SparseMatrix & M);
  ~SparseMatrix();

  void SetZero();

  void SetIdentity();

  SparseMatrix< T > & operator=(const SparseMatrix< T > & M);

  SparseMatrix< T > operator *(const T & V) const;

  SparseMatrix< T > & operator*=(const T & V);

  SparseMatrix< T > operator*(const SparseMatrix< T > & M) const;

  SparseMatrix< T > Multiply(const SparseMatrix< T > & M) const;

  SparseMatrix< T > MultiplyTranspose(const SparseMatrix< T > & Mt) const;

  template< class T2 >
  Vector< T2 > operator*(const Vector< T2 > & V) const;

  template< class T2 >
  Vector< T2 > Multiply(const Vector< T2 > & V) const;

  template< class T2 >
  void Multiply(const Vector< T2 > & In, Vector< T2 > & Out) const;

  SparseMatrix< T > Transpose() const;

  static int Solve(const SparseMatrix< T > & M,
                   const Vector< T > & b,
                   const int & iters,
                   Vector< T > & solution,
                   const T eps = 1e-8);

  template< class T2 >
  static int SolveSymmetric(const SparseMatrix< T > & M,
                            const Vector< T2 > & b,
                            const int & iters,
                            Vector< T2 > & solution,
                            const T2 eps = 1e-8,
                            const int & reset = 1);
};
template< class T, int Dim >
class SparseNMatrix
{
private:
  static int UseAlloc;
public:
  static Allocator< NMatrixEntry< T, Dim > > NMatrixAllocator;
  static int UseAllocator(void);

  static void SetAllocator(const int & blockSize);

  int rows;
  int *rowSizes;
  NMatrixEntry< T, Dim > **m_ppElements;

  SparseNMatrix();
  SparseNMatrix(int rows);
  void Resize(int rows);

  void SetRowSize(int row, int count);

  int Entries(void);

  SparseNMatrix(const SparseNMatrix & M);
  ~SparseNMatrix();

  SparseNMatrix & operator=(const SparseNMatrix & M);

  SparseNMatrix operator *(const T & V) const;

  SparseNMatrix & operator*=(const T & V);

  template< class T2 >
  NVector< T2, Dim > operator*(const Vector< T2 > & V) const;

  template< class T2 >
  Vector< T2 > operator*(const NVector< T2, Dim > & V) const;
};

template< class T >
class SparseSymmetricMatrix:public SparseMatrix< T >
{
public:

  template< class T2 >
  Vector< T2 > operator*(const Vector< T2 > & V) const;

  template< class T2 >
  Vector< T2 > Multiply(const Vector< T2 > & V) const;

  template< class T2 >
  void Multiply(const Vector< T2 > & In, Vector< T2 > & Out) const;

  template< class T2 >
  static int Solve(const SparseSymmetricMatrix< T > & M,
                   const Vector< T2 > & b,
                   const int & iters,
                   Vector< T2 > & solution,
                   const T2 eps = 1e-8,
                   const int & reset = 1);

  template< class T2 >
  static int Solve(const SparseSymmetricMatrix< T > & M,
                   const Vector< T > & diagonal,
                   const Vector< T2 > & b,
                   const int & iters,
                   Vector< T2 > & solution,
                   const T2 eps = 1e-8,
                   const int & reset = 1);
};

#include "SparseMatrix.inl"

#endif