---
title: "transformQuat | JavaScript maps SDK"
description: "Documentation for MapTiler SDK"
---

> For AI agents: a documentation index is available at [/llms.txt](https://docs.maptiler.com/llms.txt). Markdown versions of all pages are available by appending .md to any URL.

# Function transformQuat

-   transformQuat(out: [vec3](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.vec3/), a: [ReadonlyVec3](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.ReadonlyVec3/), q: [ReadonlyQuat](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.ReadonlyQuat/)): [vec3](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.vec3/)[](#transformquat)
    
    Transforms the vec3 with a quat Can also be used for dual quaternions. (Multiply it with the real part)
    
    #### Parameters
    
    -   out: [vec3](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.vec3/)
        
        the receiving vector
        
    -   a: [ReadonlyVec3](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.ReadonlyVec3/)
        
        the vector to transform
        
    -   q: [ReadonlyQuat](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.ReadonlyQuat/)
        
        normalized quaternion to transform with
        
    
    #### Returns [vec3](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.vec3/)
    
    out