Enum ColorMap 

pub enum ColorMap {
    Viridis,
    Magma,
    Turbo,
    GrayScale,
    RdBu,
    Custom {
        stops: Vec<Color>,
    },
}

A continuous colour ramp.

The named ramps are fieldless so a host UI can list them in a dropdown and they cross the wasm boundary as plain integers, following crate::preset::ColorCycle. Custom carries its own stops for hosts that need a ramp figgy does not ship.

Variants

Viridis

Perceptually uniform blue→green→yellow. The safe default for unsigned magnitudes.

Magma

Perceptually uniform black→purple→orange→white.

Turbo

High-contrast rainbow. Reads well for fine structure, poor for judging magnitude — and unreadable in greyscale print.

GrayScale

Black→white. For print, and for overlaying contour lines on top.

RdBu

Diverging red→white→blue. For signed data around a meaningful zero; set axis.min = -axis.max or the white midpoint lands off zero and the ramp lies about the sign.

Custom

Host-supplied stops, sampled in order at evenly spaced positions.

Fewer than two stops cannot define a ramp: sample and lut fall back to fully transparent rather than inventing an endpoint, so a malformed custom map draws nothing instead of drawing a lie.

Fields

stops: Vec<Color>

Implementations

impl ColorMap

pub fn stops(&self) -> &[Color]

The ramp’s control points, in ramp order.

pub fn sample(&self, t: f32) -> Color

Colour at normalized position t.

t is clamped to [0, 1], so a caller that has not normalized its z range gets the endpoint colour rather than an out-of-range index. NaN clamps to the low end — but a NaN z should be drawn with the colourbar’s nan_color instead of being pushed through here, because “missing” and “smallest” are different facts.

pub fn lut(&self) -> [Color; 256]

The ramp baked to LUT_LEN entries.

A convenience for callers that want the ramp as a table — a legend image, a texture upload of their own. figgy’s own paths do not use it: the colourbar strip and field_columnar.wgsl both evaluate Self::sample over the same stops, which is what makes their colours agree exactly instead of within a quantization step.

Trait Implementations

impl Clone for ColorMap

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColorMap

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

Formats the value using the given formatter.

impl Default for ColorMap

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ColorMap

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for ColorMap

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for ColorMap

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ColorMap