Write a function in Unity using C# to map a given distance between 200 and 300 to the range of 0 to 1
Here's a function in C# that maps a distance value between 200 and 300 to the range of 0 to 1:
```csharp
float MapDistanceToRange(float distance)
{
    float minDistance = 200.0f;
    float maxDistance = 300.0f;
    float mappedValue = Mathf.InverseLerp(minDistance, maxDistance, distance);
    return mappedValue;
}
```
The `Mathf.InverseLerp()` function maps a value between a minimum and maximum range to a normalized value between 0 and 1. In this example, we set the minimum distance to 200 and the maximum distance to 300. The function takes a distance value as input and returns the mapped value.

You can use this function in your Unity project by calling it with a distance value between 200 and 300. For example:

```csharp
float distance = 250.0f;
float mappedValue = MapDistanceToRange(distance);
Debug.Log(mappedValue); // Output: 0.5
```
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