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add fromArray() and wrapArray().

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For example, the following now works:

  double a1[3] = {1.0, 3.0, 2.0}, a2[3];
  Vector3d::wrapArray(a2) = 2 * Vector3d::fromArray(a1);
  cout << Vector3d::fromArray(a2) << endl; // output: 2,6,4
This commit is contained in:
Benoit Jacob
2007-10-14 14:45:31 +00:00
parent 3f97918760
commit a94a8c68e8
6 changed files with 152 additions and 1 deletions
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66
src/Core/FromArray.h Normal file
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@@ -0,0 +1,66 @@
// This file is part of Eigen, a lightweight C++ template library
// for linear algebra. Eigen itself is part of the KDE project.
//
// Copyright (C) 2006-2007 Benoit Jacob <jacob@math.jussieu.fr>
//
// Eigen is free software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the Free Software
// Foundation; either version 2 or (at your option) any later version.
//
// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
// FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
// details.
//
// You should have received a copy of the GNU General Public License along
// with Eigen; if not, write to the Free Software Foundation, Inc., 51
// Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
//
// As a special exception, if other files instantiate templates or use macros
// or functions from this file, or you compile this file and link it
// with other works to produce a work based on this file, this file does not
// by itself cause the resulting work to be covered by the GNU General Public
// License. This exception does not invalidate any other reasons why a work
// based on this file might be covered by the GNU General Public License.
#ifndef EI_FROMARRAY_H
#define EI_FROMARRAY_H
template<typename MatrixType> class FromArray
: public Object<typename MatrixType::Scalar, FromArray<MatrixType> >
{
public:
typedef typename MatrixType::Scalar Scalar;
friend class Object<Scalar, FromArray<MatrixType> >;
static const int RowsAtCompileTime = MatrixType::RowsAtCompileTime,
ColsAtCompileTime = MatrixType::ColsAtCompileTime;
FromArray(int rows, int cols, const Scalar* array) : m_rows(rows), m_cols(cols), m_array(array)
{
assert(rows > 0 && cols > 0);
}
private:
FromArray& _ref() { return *this; }
const FromArray& _constRef() const { return *this; }
int _rows() const { return m_rows; }
int _cols() const { return m_cols; }
const Scalar& _read(int row, int col) const
{
return m_array[row + col * m_rows];
}
protected:
int m_rows, m_cols;
const Scalar* m_array;
};
template<typename Scalar, typename Derived>
FromArray<Derived> Object<Scalar, Derived>::fromArray(const Scalar* array, int rows, int cols)
{
return FromArray<Derived>(rows, cols, array);
}
#endif // EI_FROMARRAY_H