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