FloatExponentialDecaySpec

public class FloatExponentialDecaySpec(
    @FloatRange(from = 0.0, fromInclusive = false) frictionMultiplier: Float = 1f,
    @FloatRange(from = 0.0, fromInclusive = false) absVelocityThreshold: Float = 0.1f,
) : FloatDecayAnimationSpec

This is a decay animation where the friction/deceleration is always proportional to the velocity. As a result, the velocity goes under an exponential decay. The constructor parameter, frictionMultiplier, can be tuned to adjust the amount of friction applied in the decay. The higher the multiplier, the higher the friction, the sooner the animation will stop, and the shorter distance the animation will travel with the same starting condition.

Parameters

Properties

absVelocityThreshold

override val absVelocityThreshold: Float = max(0.0000001f, abs(absVelocityThreshold))

Functions

getValueFromNanos

override fun getValueFromNanos(
        playTimeNanos: Long,
        initialValue: Float,
        initialVelocity: Float,
    ): Float

getVelocityFromNanos

override fun getVelocityFromNanos(
        playTimeNanos: Long,
        initialValue: Float,
        initialVelocity: Float,
    ): Float

getDurationNanos

override fun getDurationNanos(initialValue: Float, initialVelocity: Float): Long

getTargetValue

override fun getTargetValue(initialValue: Float, initialVelocity: Float): Float