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

### Các phiên bản
```glsl
float normalize(float x)  
vec2 normalize(vec2 x)  
vec3 normalize(vec3 x)  
vec4 normalize(vec4 x)
```

### Các tham số
```x``` specifies the vector to normalize.

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

### Tham khảo thêm

[length()](/glossary/?lan=vi&search=length)