D< d, arg, Sys_eqs, BACKWARD > Class Template Reference

First order BACKWARD derivative on direction i. More...

Detailed Description

template<unsigned int d, typename arg, typename Sys_eqs>
class D< d, arg, Sys_eqs, BACKWARD >

First order BACKWARD derivative on direction i.

*
*  -1.0    1.0
*    *------+
*
* 

Definition at line 395 of file Derivative.hpp.

#include <Derivative.hpp>

Static Public Member Functions
static void	value (const typename stub_or_real< Sys_eqs, Sys_eqs::dims, typename Sys_eqs::stype, typename Sys_eqs::b_grid::decomposition::extended_type >::type &g_map, grid_dist_key_dx< Sys_eqs::dims > &kmap, const grid_sm< Sys_eqs::dims, void > &gs, typename Sys_eqs::stype(&spacing)[Sys_eqs::dims], std::unordered_map< long int, typename Sys_eqs::stype > &cols, typename Sys_eqs::stype coeff)
	Calculate which colums of the Matrix are non zero.
static grid_key_dx< Sys_eqs::dims >	position (grid_key_dx< Sys_eqs::dims > &pos, const grid_sm< Sys_eqs::dims, void > &gs, const comb< Sys_eqs::dims >(&s_pos)[Sys_eqs::nvar])
	Calculate the position where the derivative is calculated.

Member Function Documentation

position()

template<unsigned int d, typename arg , typename Sys_eqs >

static grid_key_dx< Sys_eqs::dims > D< d, arg, Sys_eqs, BACKWARD >::position ( grid_key_dx< Sys_eqs::dims > &  pos, const grid_sm< Sys_eqs::dims, void > &  gs, const comb< Sys_eqs::dims >(&)  s_pos[Sys_eqs::nvar]  )

inlinestatic

Calculate the position where the derivative is calculated.

In case of non staggered case this function just return a null grid_key, in case of staggered, the BACKWARD scheme return the position of the staggered property

Parameters

pos	position where we are calculating the derivative
gs	Grid info
s_pos	staggered position of the properties

Returns

where (in which cell grid) the derivative is calculated

Definition at line 443 of file Derivative.hpp.

value()

template<unsigned int d, typename arg , typename Sys_eqs >

static void D< d, arg, Sys_eqs, BACKWARD >::value ( const typename stub_or_real< Sys_eqs, Sys_eqs::dims, typename Sys_eqs::stype, typename Sys_eqs::b_grid::decomposition::extended_type >::type &  g_map, grid_dist_key_dx< Sys_eqs::dims > &  kmap, const grid_sm< Sys_eqs::dims, void > &  gs, typename Sys_eqs::stype(&)  spacing[Sys_eqs::dims], std::unordered_map< long int, typename Sys_eqs::stype > &  cols, typename Sys_eqs::stype  coeff  )

inlinestatic

Calculate which colums of the Matrix are non zero.

Parameters

g_map	mapping grid
kmap	position where the derivative is calculated
gs	Grid info
spacing	of the grid
cols	non-zero colums calculated by the function
coeff	coefficent (constant in front of the derivative)

Example

Definition at line 413 of file Derivative.hpp.

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The documentation for this class was generated from the following file:

• openfpm_numerics/src/FiniteDifference/Derivative.hpp