Inverse Lerp
Menu Path : Operator > Math > Arithmetic > Inverse Lerp
The Inverse Lerp Operator calculates a fraction which represents how far through a value is between two border values. Whereas the Lerp Operator takes a fraction and outputs a blend between the two values, this Operator takes a blended value and outputs the fraction. For example, if a and b are the two border values, t is the fraction, and value is the blend between a and b:
- Lerp (a, b, t) = value.
- Inverse Lerp (a, b, value) = t.
This Operator accepts a number of input values of various types. For the list of types this Operator can use, see Available Types. The X and Y input are always of the same type. The S input is either a float or a vector of the same size as X and Y.
Operator properties
| Input | Type | Description |
|---|---|---|
| X | Configurable | The value to interpolate from. |
| Y | Configurable | The value to interpolate to. |
| S | Configurable | A value for the inverse interpolation. |
| Output | Type | Description |
|---|---|---|
| Out | Dependent | The inverse of the linear interpolation of S between X and Y. The Type changes to match the type of X and Y. |
Operator configuration
To view the Operator’s configuration, click the cog icon in the Operator’s header. X and Y must be of the same type among Available Types. S is either a float or the same type as X and Y. If S is a vector type Unity calculates the interpolation value by value.
If S is between X and Y then the result is between 0 and 1.
Available types
You can use the following types for your input ports:
- float
- Vector
- Vector2
- Vector3
- Vector4
- Position
- Direction