30 lines
1.0 KiB
Markdown
30 lines
1.0 KiB
Markdown
|
# Inverse Lerp Node
|
||
|
|
|
||
|
|
## Description
|
||
|
|
|
||
|
|
Returns the linear parameter that produces the interpolant specified by input **T** within the range of input **A** to input **B**.
|
||
|
|
|
||
|
|
**Inverse Lerp** is the inverse operation of the [Lerp Node](Lerp-Node.md). It can be used to determine what the input to a [Lerp](Lerp-Node.md) was based on its output.
|
||
|
|
|
||
|
|
For example, the value of a **Lerp** between 0 and 2 with a **T** value of 0.5 is 1. Therefore the value of an **Inverse Lerp** between 0 and 2 with a **T** value of 1 is 0.5.
|
||
|
|
|
||
|
|
## Ports
|
||
|
|
|
||
|
|
| Name | Direction | Type | Description |
|
||
|
|
|:------------ |:-------------|:-----|:---|
|
||
|
|
| A | Input | Dynamic Vector | First input value |
|
||
|
|
| B | Input | Dynamic Vector | Second input value |
|
||
|
|
| T | Input | Dynamic Vector | Time value |
|
||
|
|
| Out | Output | Dynamic Vector | Output value |
|
||
|
|
|
||
|
|
## Generated Code Example
|
||
|
|
|
||
|
|
The following example code represents one possible outcome of this node.
|
||
|
|
|
||
|
|
```
|
||
|
|
void Unity_InverseLerp_float4(float4 A, float4 B, float4 T, out float4 Out)
|
||
|
|
{
|
||
|
|
Out = (T - A)/(B - A);
|
||
|
|
}
|
||
|
|
```
|