Class TriangularQuadrature

Defined in File triangular_quadrature.h

Inheritance Relationships

Base Type

public opensn::AngularQuadrature (Class AngularQuadrature)

Derived Types

public opensn::GLCTriangularQuadrature2DXY (Class GLCTriangularQuadrature2DXY)
public opensn::GLCTriangularQuadrature3DXYZ (Class GLCTriangularQuadrature3DXYZ)

Class Documentation

class TriangularQuadrature : public opensn::AngularQuadrature 

Base class for triangular quadratures.

Unlike product quadratures which have a fixed number of azimuthal angles per polar level, triangular quadratures have a varying number that decreases as the polar angle moves away from the equatorial plane.

Subclassed by opensn::GLCTriangularQuadrature2DXY, opensn::GLCTriangularQuadrature3DXYZ

Public Functions

~TriangularQuadrature() override = default

inline unsigned int GetAngleNum(const unsigned int polar_angle_index, const unsigned int azimu_angle_index) const: Return the abscissae index for the given polar and azimuthal angle indices.

inline const std::map<unsigned int, std::vector<unsigned int>> &GetDirectionMap() const: Return constant reference to map_directions.

inline const std::vector<double> &GetPolarAngles() const: Polar angles for each polar level.

inline const std::vector<std::vector<double>> &GetAzimuthalAnglesPerPolarLevel() const: Azimuthal angles for each polar level.

inline virtual unsigned int GetNumPolarAngles() const override: Number of polar angles used by harmonic-selection rules.

inline virtual unsigned int GetNumAzimuthalAngles() const override: Number of azimuthal angles used by harmonic-selection rules.

Protected Functions

inline TriangularQuadrature(unsigned int dimension, unsigned int scattering_order, OperatorConstructionMethod method = OperatorConstructionMethod::STANDARD)

Protected Attributes

double weight_sum_: Sum of all quadrature weights.

std::vector<double> polar_ang_: Polar angles for each polar level.

std::vector<std::vector<double>> azimuthal_per_polar_

Azimuthal angles for each polar level.

The number of azimuthal angles decreases as the polar angle moves away from the equator, in contrast to product quadratures which have a fixed count at every level.

std::map<unsigned int, std::vector<unsigned int>> map_directions_: Linear indices of ordered directions mapped to polar level.

unsigned int n_polar_ = 0: Number of polar angles specified for this triangular quadrature.

unsigned int n_azimuthal_ = 0: Maximum number of azimuthal angles specified for this triangular quadrature.