Struct DiscreteColorScale 

pub struct DiscreteColorScale { /* private fields */ }

A discrete color scale that maps value ranges to colors.

The scale works by finding the highest threshold that the input value exceeds, and returning the corresponding color. Levels are automatically sorted from highest to lowest threshold during construction.

Example

use nexrad_render::{ColorScaleLevel, DiscreteColorScale, Color};

let scale = DiscreteColorScale::new(vec![
    ColorScaleLevel::new(0.0, Color::BLACK),
    ColorScaleLevel::new(30.0, Color::rgb(0.0, 1.0, 0.0)),
    ColorScaleLevel::new(50.0, Color::rgb(1.0, 0.0, 0.0)),
]);

// Values >= 50 return red, >= 30 return green, >= 0 return black

Implementations

impl DiscreteColorScale

pub fn new(levels: Vec<ColorScaleLevel>) -> Self

Creates a new discrete color scale from the given levels.

Levels are automatically sorted from highest to lowest threshold.

pub fn color(&self, value: f32) -> Color

Returns the color for the given value.

Finds the highest threshold that the value exceeds and returns its color. If the value is below all thresholds, returns the color of the lowest threshold.

pub fn levels(&self) -> &[ColorScaleLevel]

Returns the levels in this color scale (sorted highest to lowest).

Trait Implementations

impl Clone for DiscreteColorScale

fn clone(&self) -> DiscreteColorScale

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DiscreteColorScale

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

Formats the value using the given formatter.

impl From<DiscreteColorScale> for ColorScale

fn from(scale: DiscreteColorScale) -> Self

Converts to this type from the input type.