kite3d/io.github.yuroyami.kite3d.math.interpolants/CubicInterpolant

CubicInterpolant

class CubicInterpolant(parameterPositions: DoubleArray, sampleValues: DoubleArray, sampleSize: Int, resultBuffer: DoubleArray = DoubleArray(sampleSize)) : Interpolant

Fast and simple cubic spline interpolant.

It was derived from a Hermitian construction setting the first derivative at each sample position to the linear slope between neighboring positions over their parameter interval.

Parameters

parameterPositions

The parameter positions holding the interpolation factors.

sampleValues

The sample values.

sampleSize

The sample size (a.k.a. the value size / stride).

resultBuffer

The result buffer; defaults to a fresh DoubleArray(sampleSize).

Constructors

CubicInterpolant

constructor(parameterPositions: DoubleArray, sampleValues: DoubleArray, sampleSize: Int, resultBuffer: DoubleArray = DoubleArray(sampleSize))

Properties

DefaultSettings_

open override val DefaultSettings_: InterpolantSettings

The default settings object. Overridden by CubicInterpolant.

parameterPositions

val parameterPositions: DoubleArray

The parameter positions.

val resultBuffer: DoubleArray

The result buffer. Reused across calls; overwritten by every evaluate.

val sampleValues: DoubleArray

The sample values.

var settings: InterpolantSettings?

The interpolation settings. null until assigned; getSettings_ then falls back to DefaultSettings_.

val valueSize: Int

The value size (stride).

Functions

copySampleValue_

open fun copySampleValue_(index: Int): DoubleArray

Copies a sample value to the result buffer.

fun evaluate(t: Double): DoubleArray

Evaluates the interpolant at position t.

fun getSettings_(): InterpolantSettings

Returns the interpolation settings.