Struct LogMapper 

pub struct LogMapper { /* private fields */ }

Logarithmic range mapping.

Maps values logarithmically between the range endpoints. Suitable for frequency parameters where perceptual response is logarithmic.

Panics

Panics if the range contains zero or negative values, as logarithm is undefined for non-positive numbers.

Example

let mapper = LogMapper::new(20.0..=20000.0);
// Geometric mean is at normalized 0.5
let mid = mapper.denormalize(0.5);
assert!((mid - 632.45).abs() < 1.0); // sqrt(20 * 20000)

Implementations

impl LogMapper

pub fn new(range: RangeInclusive<f64>) -> Self

Create a new logarithmic mapper with the given range.

Panics

Panics if:

• The range start is not positive (log requires positive values)
• The range end is not greater than the range start

Trait Implementations

impl Clone for LogMapper

fn clone(&self) -> LogMapper

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LogMapper

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl RangeMapper for LogMapper

fn normalize(&self, plain: f64) -> f64

Convert a plain value to normalized (0.0-1.0).

fn denormalize(&self, normalized: f64) -> f64

Convert a normalized value (0.0-1.0) to plain.

fn range(&self) -> (f64, f64)

Get the plain value range as (min, max).

fn default_normalized(&self, plain_default: f64) -> f64

Get the default normalized value for a given plain default.