Struct Bspline 

pub struct Bspline { /* private fields */ }

Bicubic spline interpolator.

Use init() or the point-by-point API (init_num, add_point, prepare) to set up data, then get() or get_stateful() to evaluate.

Port of C++ agg::bspline.

Implementations

impl Bspline

pub fn new() -> Self

Create an empty spline.

pub fn new_with_points(x: &[f64], y: &[f64]) -> Self

Create and initialize from arrays.

pub fn init_num(&mut self, max: usize)

Initialize the spline storage for max points.

pub fn add_point(&mut self, x: f64, y: f64)

Add a data point (call after init_num, before prepare).

pub fn prepare(&mut self)

Compute the spline coefficients (call after adding all points).

pub fn init(&mut self, x: &[f64], y: &[f64])

Initialize from x and y arrays.

pub fn get(&self, x: f64) -> f64

Evaluate the spline at x (stateless binary search each call).

pub fn get_stateful(&self, x: f64) -> f64

Evaluate the spline at x with cached index (faster for sequential access).

Trait Implementations

impl Default for Bspline

fn default() -> Self

Returns the “default value” for a type.