WorldBuilder::Utilities::interpolation Class Reference

#include <utilities.h>

Public Member Functions
void	set_points (const std::vector< double > &y)
double	operator() (const double x) const
double	operator() (const double x, const size_t idx, const double h) const
double	value_inside (const size_t idx, const double h) const
double	value_outside (const size_t idx, const double h) const

Public Attributes
size_t	mx_size_min
std::vector< std::array< double, 4 > >	m

Detailed Description

Class for linear and monotone spline interpolation

Definition at line 188 of file utilities.h.

Member Function Documentation

operator()() [1/2]

double WorldBuilder::Utilities::interpolation::operator() ( const double  x ) const

inline

Evaluate at point x.

Definition at line 203 of file utilities.h.

operator()() [2/2]

double WorldBuilder::Utilities::interpolation::operator() ( const double  x, const size_t  idx, const double  h  ) const

inline

Definition at line 218 of file utilities.h.

set_points()

void WorldBuilder::Utilities::interpolation::set_points

(

const std::vector< double > &

y

)

Initialize the spline. This function assumes that all y points are spaced 1 in the x direction.

Parameters

y	Values in the interpolation points.

This monotone spline algorithm is based on the javascript version at https://en.wikipedia.org/wiki/Monotone_cubic_interpolation. The parameters from this algorithm prevent overshooting in the interpolation spline.

Definition at line 1040 of file utilities.cc.

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value_inside()

double WorldBuilder::Utilities::interpolation::value_inside ( const size_t  idx, const double  h  ) const

inline

Evaluate at point x. assumes x is between 0 and mx_size_min. assume size_t idx = (size_t)x and h = x-idx.

Definition at line 233 of file utilities.h.

value_outside()

double WorldBuilder::Utilities::interpolation::value_outside ( const size_t  idx, const double  h  ) const

inline

Evaluate at point x. assumes x is between 0 and mx_size_min. assume size_t idx = (size_t)x and h = x-idx.

Definition at line 246 of file utilities.h.

Member Data Documentation

m

std::vector<std::array<double,4> > WorldBuilder::Utilities::interpolation::m

interpolation parameters [ f(x) = a*(x-x_i)^3 + b*(x-x_i)^2 + c*(x-x_i) + y_i ]

Definition at line 265 of file utilities.h.

mx_size_min

size_t WorldBuilder::Utilities::interpolation::mx_size_min

number of x coordinates of points

Definition at line 257 of file utilities.h.

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

• include/world_builder/utilities.h
• source/world_builder/utilities.cc