orb5x::BSplineEval3D Struct Reference

Tensor-product basis data for the \((s,\chi,\varphi)\) field grid. More...

#include "bspline.hpp"

Collaboration diagram for orb5x::BSplineEval3D:

Public Member Functions
void	evaluate (Real s, Real chi, Real phi, Real s0, Real chi0, Real phi0, Real ds_inv, Real dchi_inv, Real dphi_inv, int degree)
	Locate a point and evaluate its one-dimensional cardinal bases.

Public Attributes
BSplineEval	chi_eval
	Straight-field-line poloidal-angle basis evaluation.
BSplineEval	phi_eval
	Toroidal-angle basis evaluation.
BSplineEval	s_eval
	Radial normalized-flux basis evaluation.

Detailed Description

Tensor-product basis data for the \((s,\chi,\varphi)\) field grid.

evaluate() locates each coordinate independently and stores cardinal basis weights plus absolute mesh indices. The structure does not form the full tensor product; callers combine the three one-dimensional evaluations.

Member Function Documentation

evaluate()

void orb5x::BSplineEval3D::evaluate	(	Real	s,
		Real	chi,
		Real	phi,
		Real	s0,
		Real	chi0,
		Real	phi0,
		Real	ds_inv,
		Real	dchi_inv,
		Real	dphi_inv,
		int	degree
	)

Locate a point and evaluate its one-dimensional cardinal bases.

Parameters

[in]	s	Normalized radial coordinate.
[in]	chi	Straight-field-line poloidal angle, in radians.
[in]	phi	Toroidal angle, in radians.
[in]	s0	Radial coordinate of grid point zero.
[in]	chi0	Poloidal coordinate of grid point zero, in radians.
[in]	phi0	Toroidal coordinate of grid point zero, in radians.
[in]	ds_inv	Inverse radial grid spacing.
[in]	dchi_inv	Inverse poloidal angular spacing, in radian inverse.
[in]	dphi_inv	Inverse toroidal angular spacing, in radian inverse.
[in]	degree	Number of active basis functions, in the range 1–4.

Postcondition

s_eval, chi_eval, and phi_eval contain degree weights and absolute grid indices.

Member Data Documentation

chi_eval

BSplineEval orb5x::BSplineEval3D::chi_eval

Straight-field-line poloidal-angle basis evaluation.

phi_eval

BSplineEval orb5x::BSplineEval3D::phi_eval

Toroidal-angle basis evaluation.

s_eval

BSplineEval orb5x::BSplineEval3D::s_eval

Radial normalized-flux basis evaluation.

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

• bspline.hpp