> For the complete documentation index, see [llms.txt](https://myty.gitbook.io/products/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://myty.gitbook.io/products/kit/make-animation/9.-apply-motion-tracking/character-movement.md).

# Character Movement

## Head movement

Since the actual human neck and head are rotational joints that move in **3D space**, motion data values are calculated in **three major axes**. At this time, the names of the three axes will change depending on which axis you look at as a reference, and the movements based on each axis will appear differently. First, the **Up vector** and the **LookAt vector** are defined, and then the direction of movement will be determined based on each vector.

<figure><img src="/files/wNtMVYZWlqzcVZgtWtEy" alt=""><figcaption></figcaption></figure>

### From Up Vector

* If the Up vector is the standard, the x-axis movement becomes Roll, the y-axis movement becomes pitch, and the z-axis movement becomes yaw.

<figure><img src="/files/5CNUhi3c5DOsKtMMu7mX" alt=""><figcaption></figcaption></figure>

### From LookAt Vector

* If the LookAt vector is the standard, the x-axis movement becomes pitch, the y-axis movement becomes yaw, and the z-axis movement becomes roll.

<figure><img src="/files/4M2lNeyiQNKBiTaMQYAx" alt=""><figcaption></figcaption></figure>


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