---
title: "bezier | 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 bezier

-   bezier(  
        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/),  
        b: [ReadonlyVec3](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.ReadonlyVec3/),  
        c: [ReadonlyVec3](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.ReadonlyVec3/),  
        d: [ReadonlyVec3](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.ReadonlyVec3/),  
        t: number,  
    ): [vec3](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.vec3/)[](#bezier)
    
    Performs a bezier interpolation with two control points
    
    #### 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 first operand
        
    -   b: [ReadonlyVec3](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.ReadonlyVec3/)
        
        the second operand
        
    -   c: [ReadonlyVec3](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.ReadonlyVec3/)
        
        the third operand
        
    -   d: [ReadonlyVec3](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.ReadonlyVec3/)
        
        the fourth operand
        
    -   t: number
        
        interpolation amount, in the range \[0-1\], between the two inputs
        
    
    #### Returns [vec3](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.vec3/)
    
    out