43 lines
2.3 KiB
Markdown
43 lines
2.3 KiB
Markdown
|
# 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](Operator-Lerp.md) 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](#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](#operator-configuration) | The value to interpolate from. |
|
|||
|
|
| **Y** | [Configurable](#operator-configuration) | The value to interpolate to. |
|
|||
|
|
| **S** | [Configurable](#operator-configuration) | A value for the inverse interpolation. |
|
|||
|
|
|
|||
|
|
| **Output** | **Type** | **Description** |
|
|||
|
|
| ---------- | --------- | ------------------------------------------------------------ |
|
|||
|
|
| **Out** | Dependent | The inverse of the linear interpolation of **S** between **X** and **Y**.<br/>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](#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**
|