/**
 * @file   stencils.hpp
 * @author Julian Iseringhausen <isering@ins.uni-bonn.de>
 * @date   Mon Apr 18 13:06:11 2011
 *
 * @brief  Some examples for stencils.
 *
 */

#ifndef STENCILS_HPP_
#define STENCILS_HPP_

#include "base/stencil.hpp"

namespace VMG
{

class Injection : public Stencil
{
public:
  Injection() :
    Stencil(1.0)
  {}
};

class InterpolationTrilinear : public Stencil
{
public:
  InterpolationTrilinear() :
    Stencil(1.0)
  {
    this->push_back( 1,  0,  0, 0.5);
    this->push_back(-1,  0,  0, 0.5);
    this->push_back( 0,  1,  0, 0.5);
    this->push_back( 0, -1,  0, 0.5);
    this->push_back( 0,  0,  1, 0.5);
    this->push_back( 0,  0, -1, 0.5);

    this->push_back( 1,  1,  0, 0.25);
    this->push_back( 1, -1,  0, 0.25);
    this->push_back(-1,  1,  0, 0.25);
    this->push_back(-1, -1,  0, 0.25);
    this->push_back( 0,  1,  1, 0.25);
    this->push_back( 0,  1, -1, 0.25);
    this->push_back( 0, -1,  1, 0.25);
    this->push_back( 0, -1, -1, 0.25);
    this->push_back( 1,  0,  1, 0.25);
    this->push_back( 1,  0, -1, 0.25);
    this->push_back(-1,  0,  1, 0.25);
    this->push_back(-1,  0, -1, 0.25);

    this->push_back( 1,  1,  1, 0.125);
    this->push_back( 1,  1, -1, 0.125);
    this->push_back( 1, -1,  1, 0.125);
    this->push_back(-1,  1,  1, 0.125);
    this->push_back( 1, -1, -1, 0.125);
    this->push_back(-1,  1, -1, 0.125);
    this->push_back(-1, -1,  1, 0.125);
    this->push_back(-1, -1, -1, 0.125);
  }
};

class RestrictionFullWeight : public Stencil
{
public:
  RestrictionFullWeight() :
    Stencil(0.125)
  {
    this->push_back( 1,  0,  0, 0.0625);
    this->push_back(-1,  0,  0, 0.0625);
    this->push_back( 0,  1,  0, 0.0625);
    this->push_back( 0, -1,  0, 0.0625);
    this->push_back( 0,  0,  1, 0.0625);
    this->push_back( 0,  0, -1, 0.0625);

    this->push_back( 1,  1,  0, 0.03125);
    this->push_back( 1, -1,  0, 0.03125);
    this->push_back(-1,  1,  0, 0.03125);
    this->push_back(-1, -1,  0, 0.03125);
    this->push_back( 0,  1,  1, 0.03125);
    this->push_back( 0,  1, -1, 0.03125);
    this->push_back( 0, -1,  1, 0.03125);
    this->push_back( 0, -1, -1, 0.03125);
    this->push_back( 1,  0,  1, 0.03125);
    this->push_back( 1,  0, -1, 0.03125);
    this->push_back(-1,  0,  1, 0.03125);
    this->push_back(-1,  0, -1, 0.03125);

    this->push_back( 1,  1,  1, 0.015625);
    this->push_back( 1,  1, -1, 0.015625);
    this->push_back( 1, -1,  1, 0.015625);
    this->push_back(-1,  1,  1, 0.015625);
    this->push_back( 1, -1, -1, 0.015625);
    this->push_back(-1,  1, -1, 0.015625);
    this->push_back(-1, -1,  1, 0.015625);
    this->push_back(-1, -1, -1, 0.015625);
  }
};

namespace Stencils
{
  static const VMG::Stencil Injection = VMG::Injection();
  static const VMG::Stencil InterpolationTrilinear = VMG::InterpolationTrilinear();
  static const VMG::Stencil RestrictionFullWeight = VMG::RestrictionFullWeight();
}

}

#endif /* STENCILS_HPP_ */