# Normalize

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> **Source:** [Book of Shaders](https://thebookofshaders.com/glossary/?search=normalize)

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## Definition

## Normalize
Calculate the unit vector in the same direction as the input vector

### Declaration
```glsl
float normalize(float x)  
vec2 normalize(vec2 x)  
vec3 normalize(vec3 x)  
vec4 normalize(vec4 x)
```

### Parameters
```x``` specifies the vector to normalize.

### Description
```normalize()``` returns a vector with the same direction as its parameter, ```x```, but with length 1.

### See Also

[length()](/glossary/?search=length)
...

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