Struct TransferFunction2D 

pub struct TransferFunction2D { /* private fields */ }

A 2D transfer function mapping (scalar, gradient magnitude) to RGBA.

This is a practical building block for feature classification: for example, highlight bone-like CT values only when the gradient magnitude is high.

Implementations

impl TransferFunction2D

pub fn new() -> Self

Create an empty 2D transfer function with transparent background.

pub fn with_background(self, rgba: [f64; 4]) -> Self

Set the fallback RGBA returned when no region matches.

pub fn add_region(&mut self, region: TransferFunction2DRegion)

Add a region.

pub fn remove_region( &mut self, index: usize, ) -> Option<TransferFunction2DRegion>

Remove the region at index, if it exists.

pub fn regions(&self) -> &[TransferFunction2DRegion]

Borrow all configured regions.

pub fn evaluate(&self, scalar: f64, gradient: f64) -> [f64; 4]

Evaluate the transfer function.

Matching regions are composited in insertion order.

Trait Implementations

impl Clone for TransferFunction2D

fn clone(&self) -> TransferFunction2D

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TransferFunction2D

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

Formats the value using the given formatter.

impl Default for TransferFunction2D

fn default() -> TransferFunction2D

Returns the “default value” for a type.