interpolation.hpp File Reference

#include <utils/index.hpp>
#include <utils/math/bspline.hpp>
#include <algorithm>
#include <cassert>
#include <cstddef>
#include <span>
#include <tuple>
#include <utility>
#include <vector>

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Classes
struct	InterpolationWeights< cao >
	Interpolation weights for one point. More...
class	p3m_interpolation_cache
	Cache for interpolation weights. More...

Functions
template<int cao>
InterpolationWeights< cao >	p3m_calculate_interpolation_weights (const Utils::Vector3d &position, const Utils::Vector3d &ai, P3MLocalMesh const &local_mesh)
	Calculate the P-th order interpolation weights.
template<int cao, class Kernel >
void	p3m_interpolate (P3MLocalMesh const &local_mesh, InterpolationWeights< cao > const &weights, Kernel kernel)
	P3M grid interpolation.

Function Documentation

p3m_calculate_interpolation_weights()

template<int cao>

InterpolationWeights< cao > p3m_calculate_interpolation_weights	(	const Utils::Vector3d &	position,
		const Utils::Vector3d &	ai,
		P3MLocalMesh const &	local_mesh
	)

Calculate the P-th order interpolation weights.

As described in from [22] 5-189 (or 8-61). The weights are also tabulated in [10] [11].

position shift for calc. of first assignment mesh point.

Definition at line 140 of file interpolation.hpp.

References Utils::Vector< T, N >::broadcast(), Utils::bspline(), P3MLocalMesh::dim, Utils::get_linear_index(), InterpolationWeights< cao >::ind, P3MLocalMesh::ld_pos, Utils::ROW_MAJOR, InterpolationWeights< cao >::w_x, InterpolationWeights< cao >::w_y, and InterpolationWeights< cao >::w_z.

p3m_interpolate()

template<int cao, class Kernel >

void p3m_interpolate	(	P3MLocalMesh const &	local_mesh,
		InterpolationWeights< cao > const &	weights,
		Kernel	kernel
	)

P3M grid interpolation.

This runs an kernel for every interpolation point in a set of interpolation weights with the linear grid index and the weight of the point as arguments.

Parameters

local_mesh	Mesh info.
weights	Set of weights
kernel	The kernel to run.

Definition at line 192 of file interpolation.hpp.

References P3MLocalMesh::q_21_off, and P3MLocalMesh::q_2_off.

Referenced by anonymous_namespace{dp3m.cpp}::AssignTorques< cao >::operator()(), anonymous_namespace{dp3m.cpp}::AssignForces< cao >::operator()(), AssignForces< cao >::operator()(), and anonymous_namespace{p3m.cpp}::AssignCharge< cao >::operator()().