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// -*- C++ -*-
/***************************************************************************
* blitz/array/geometry.h Basic mapping from Array to physical geometry,
* used for some stencil operations.
*
* $Id$
*
* Copyright (C) 1997-2011 Todd Veldhuizen <tveldhui@acm.org>
*
* This file is a part of Blitz.
*
* Blitz is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation, either version 3
* of the License, or (at your option) any later version.
*
* Blitz 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Blitz. If not, see <http://www.gnu.org/licenses/>.
*
* Suggestions: blitz-devel@lists.sourceforge.net
* Bugs: blitz-support@lists.sourceforge.net
*
* For more information, please see the Blitz++ Home Page:
* https://sourceforge.net/projects/blitz/
*
****************************************************************************/
#ifndef BZ_GEOMETRY_H
#define BZ_GEOMETRY_H
#ifndef BZ_ARRAY_H
#error <blitz/array/geometry.h> must be included after <blitz/array.h>
#endif
BZ_NAMESPACE(blitz)
typedef double T_defaultSpatialCoordinate;
template<int N_dim, typename T = T_defaultSpatialCoordinate>
class UniformOrthoGeometry {
public:
};
template<int N_dim, typename T = T_defaultSpatialCoordinate>
class UniformCubicGeometry {
T h_;
T recip_h_;
T recip2_h_;
T recip3_h_;
TinyVector<T,N_dim> zero_;
public:
typedef T T_coord;
UniformCubicGeometry()
{
h_ = 0.0;
recip_h_ = 0.0;
recip2_h_ = 0.0;
recip3_h_ = 0.0;
zero_ = 0.0;
}
UniformCubicGeometry(T spatialStep)
{
h_ = spatialStep;
zero_ = T(0);
setup();
}
UniformCubicGeometry(T spatialStep, TinyVector<T,N_dim> zeroCoordinates)
{
h_ = spatialStep;
zero_ = zeroCoordinates;
setup();
}
TinyVector<T,N_dim> toSpatial(TinyVector<int,N_dim> logicalCoord) const
{
return zero_ + h_ * logicalCoord;
}
T spatialStep() const
{ return h_; }
T recipSpatialStep() const
{ return recip_h_; }
T recipSpatialStepPow2() const
{ return recip2_h_; }
private:
void setup()
{
recip_h_ = 1.0 / h_;
recip2_h_ = 1.0 / pow2(h_);
recip3_h_ = 1.0 / pow3(h_);
}
};
template<int N_dim, typename T = T_defaultSpatialCoordinate>
class TensorProductGeometry {
public:
};
BZ_NAMESPACE_END
#endif // BZ_GEOMETRY_H
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