---
title: "Interpolatable"
description: "Represents an object which may be able to be linearly interpolated with another object. Usually
used during animation."
type: "interface"
---

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


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

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



```kotlin
interface Interpolatable
```


Represents an object which may be able to be linearly interpolated with another object. Usually
used during animation.


## Functions

```kotlin
fun lerp(other: Any?, t: Float): Any?
```


This method is defined such that a value of `t` being 1.0 means that the interpolation has
finished, meaning that this method should return either `other` (or something equivalent to
`other`), 0.0 meaning that the interpolation has not started, returning `this` (or something
equivalent to `this`), and values in between meaning that the interpolation is at the
relevant point on the timeline between `this` and `other`. The interpolation can be
extrapolated beyond 0.0 and 1.0, so negative values and values greater than 1.0 are valid.

Note that the type of `other` may not be the same as the type of `this`, however if the
implementation knows how to losslessly convert from one type to another, the conversion can
be made in order to optimistically provide a valid interpolation.

If `other` is `null`, this can be interpreted as interpolating between "nothing" or, "no
effect", into whatever the value of `this` is. In this case, if it is possible to construct a
version of this type that is visually or semantically equivalent to "no effect", then it
might make sense to return an interpolation between that value and `this`.

If there is no known way to interpolate between the two values, the implementation should
return null.

#### Parameters

| | |
| --- | --- |
| other | The other object to be intorpolated with this one. |
| t | The position on the timeline. This is usually between 0 and 1, but it is valid for it to be outside of this range. |


#### Returns

| | |
| --- | --- |
|  | The interpolated object. |