WorldWind Kotlin/earth.worldwind.layer.mvt/MvtExpression/Interpolate

Interpolate

class Interpolate<T>(val interpolation: MvtExpression.Interpolation, val input: MvtExpression<*>, val stops: List<Pair<Double, MvtExpression<T>>>, lerp: (T, T, Double) -> T) : MvtExpression<T>

Linear or exponential interpolation between typed stops. lerp supplies the per-T blend (lerp(a, b, t) where t ∈ 0, 1); standard implementations live in Interpolators.

Constructors

Interpolate

constructor(interpolation: MvtExpression.Interpolation, input: MvtExpression<*>, stops: List<Pair<Double, MvtExpression<T>>>, lerp: (T, T, Double) -> T)

Properties

input

val input: MvtExpression<*>

interpolation

val interpolation: MvtExpression.Interpolation

stops

val stops: List<Pair<Double, MvtExpression<T>>>

Functions

evaluate

open override fun evaluate(ctx: MvtExpression.EvalContext): T?

referencesFeatureData

fun referencesFeatureData(): Boolean

True when this expression (or any sub-expression) reads per-feature data — i.e. its result can differ between two features in the same tile at the same zoom. That means a reference to a feature property (Get / Has), the feature's dynamic state (FeatureState), its geometry type (GeometryType), or its line-progress parameter (LineProgress).