I want to build a FPS controller defined by myself with C#, so I want to know the slope of the terrain. Then

I can calculate the motion . Is there some function to get the value of the slope?

If you know the normal vector of the surface youâ€™re standing on from a raycast, you can get the slope with:

```
float FindSurfaceSlope (Vector3 surfNormal) {
return Vector3.Angle (surfNormal, Vector3.up);
}
```