commonMain.io.nacular.doodle.animation.transition.FixedTimeLinear.kt Maven / Gradle / Ivy

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A pure Kotlin, UI framework for the Web

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package io.nacular.doodle.animation.transition

import io.nacular.doodle.animation.Moment
import io.nacular.measured.units.Measure
import io.nacular.measured.units.Time
import io.nacular.measured.units.Units
import io.nacular.measured.units.div
import io.nacular.measured.units.times

/**
 * Created by Nicholas Eddy on 3/30/18.
 */
public class FixedTimeLinear(duration: Measure, private val endValue: Measure): FixedDuration(duration) {
    override fun value(initial: Moment, timeOffset: Measure): Moment = Moment(initial.position + ((endValue - initial.position) / duration(initial) * timeOffset), initial.velocity)

    override fun endState(initial: Moment): Moment = Moment(endValue, initial.velocity)
}