Struct ColorRamp 

pub struct ColorRamp {
    pub stops: Vec<ColorStop>,
}

An interpolated colour transfer function defined by ordered stops.

Evaluates a scalar t to a linear RGBA colour by linearly interpolating between the two nearest stops. Values outside the stop range are clamped to the first / last stop colour.

Fields

stops: Vec<ColorStop>

Ordered colour stops. Must contain at least one entry.

Implementations

impl ColorRamp

pub fn new(stops: Vec<ColorStop>) -> Self

Create a new ramp from the given stops.

Stops are sorted by value on construction.

Panics

Panics if stops is empty.

pub fn evaluate(&self, t: f32) -> [f32; 4]

Evaluate the ramp at t, returning a linearly interpolated RGBA colour. Clamps to the boundary stops outside the range.

pub fn as_texture_data(&self, width: u32) -> Vec<u8>

Generate a 1D RGBA8 lookup-table texture of width texels.

Useful for GPU-side colour ramp evaluation via texture sampling.

pub fn len(&self) -> usize

Number of stops.

pub fn is_empty(&self) -> bool

Whether the ramp has no stops (never true after construction).

Trait Implementations

impl Clone for ColorRamp

fn clone(&self) -> ColorRamp

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColorRamp

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

Formats the value using the given formatter.