`lygia`

/`math`

/`rotate4dX`

)returns a 4x4 rotation matrix

Use:

```
rotate4dX(<float> radians)
```

```
#ifndef FNC_ROTATE4DX
#define FNC_ROTATE4DX
mat4 rotate4dX(in float r){
return mat4(
vec4(1.,0.,0.,0),
vec4(0.,cos(r),-sin(r),0.),
vec4(0.,sin(r),cos(r),0.),
vec4(0.,0.,0.,1.));
}
#endif
```

Use:

```
rotate4dX(<float> radians)
```

```
#ifndef FNC_ROTATE4DX
#define FNC_ROTATE4DX
float4x4 rotate4dX(in float phi){
return float4x4(
float4(1.,0.,0.,0),
float4(0.,cos(phi),-sin(phi),0.),
float4(0.,sin(phi),cos(phi),0.),
float4(0.,0.,0.,1.));
}
#endif
```

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