hap-fluent / createScaleTransformer

Function: createScaleTransformer()

function createScaleTransformer(
   fromMin, 
   fromMax, 
   toMin, 
toMax): ValueTransformer<number, number>;

Defined in: packages/hap-fluent/src/type-utils.ts:237

Create a ValueTransformer that linearly maps a value from one numeric range to another.

Parameters

Parameter	Type	Description
fromMin	number	Source range minimum.
fromMax	number	Source range maximum.
toMin	number	Target range minimum.
toMax	number	Target range maximum.

Returns

ValueTransformer<number, number>

A transformer function applying the linear mapping.

Example

// Convert percentage (0-100) to decimal (0-1)
const percentToDecimal = createScaleTransformer(0, 100, 0, 1);
percentToDecimal(50); // Returns 0.5

// Convert Homebridge 0-100 brightness to device 0-255 range
const brightnessToDevice = createScaleTransformer(0, 100, 0, 255);
brightnessToDevice(50); // Returns 127.5