---
title: "VectorizedDurationBasedAnimationSpec"
description: "Base class for [VectorizedAnimationSpec]s that are based on a fixed [durationMillis]."
type: "interface"
---

<div class='type'>Interface</div>


<a id='references'></a>

<div class='sourceset sourceset-common'>Common</div>



```kotlin
@JvmDefaultWithCompatibility
public interface VectorizedDurationBasedAnimationSpec<V : AnimationVector> :
    VectorizedFiniteAnimationSpec<V>
```


Base class for `VectorizedAnimationSpec`s that are based on a fixed `durationMillis`.


## Functions

```kotlin
override fun getDurationNanos(initialValue: V, targetValue: V, initialVelocity: V): Long
```