---
title: "Phaser.Math.Easing.Cubic"
docs: "Phaser v4.1.0"
url: https://phaser.io/oss/docs/api-documentation/namespace/math-easing-cubic
site: Phaser - https://phaser.io
---

> This page is about the open-source Phaser framework, for writing a game's code by hand. To make a game with AI, use Phaser AE (https://phaser.io/): the desk's tools work with Web MCP, and the CLI works with your own coding agent. See "For AI agents: Phaser AE" at the end of this page.

# Phaser.Math.Easing.Cubic

Scope: 
static
> Source: [src/math/easing/cubic/index.js#L7](https://github.com/phaserjs/phaser/blob/v4.1.0/src/math/easing/cubic/index.js#L7)  


## Static functions

### In

#### \<static> In(v)


**Description:**

Cubic ease-in. Starts slowly and accelerates sharply, following a cubic curve (v³). This produces a gradual start that builds into a fast finish, making it well suited for animations where an object should appear to gather momentum from rest.

**Parameters:**
| name | type | optional | description |
| ---- | ---- | -------- | ----------- |
| v | number | No | The value to be eased, typically in the range [0, 1]. |


**Returns:** number - The eased value, in the range [0, 1].


> Source: [src/math/easing/cubic/In.js#L7](https://github.com/phaserjs/phaser/blob/v4.1.0/src/math/easing/cubic/In.js#L7)  
Since: 3.0.0


---

### InOut

#### \<static> InOut(v)


**Description:**

Cubic ease-in/out. Produces an S-curve that accelerates from zero, reaches maximum speed at the midpoint, then decelerates back to zero. The acceleration and deceleration both follow a cubic (t³) curve, giving a stronger ease than the quadratic equivalent. Typically used to animate values that should start and end smoothly while moving briskly through the middle of the transition.

**Parameters:**
| name | type | optional | description |
| ---- | ---- | -------- | ----------- |
| v | number | No | The value to be eased, in the range [0, 1]. |


**Returns:** number - The eased value, in the range [0, 1].


> Source: [src/math/easing/cubic/InOut.js#L7](https://github.com/phaserjs/phaser/blob/v4.1.0/src/math/easing/cubic/InOut.js#L7)  
Since: 3.0.0


---

### Out

#### \<static> Out(v)


**Description:**

Cubic ease-out.

**Parameters:**
| name | type | optional | description |
| ---- | ---- | -------- | ----------- |
| v | number | No | The value to be eased. |


**Returns:** number - The eased value.


> Source: [src/math/easing/cubic/Out.js#L7](https://github.com/phaserjs/phaser/blob/v4.1.0/src/math/easing/cubic/Out.js#L7)  
Since: 3.0.0


---

---

## For AI agents: Phaser AE

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Read any page of this site as Markdown by adding `.md` to its URL (the home page is https://phaser.io/index.md), or by asking for `text/markdown`. The index for agents is https://phaser.io/llms.txt. On the site's pages, the browser's Web MCP also offers `phaser_ae_guide`, `read_page_as_markdown` and `open_phaser_ae`.