Struct InputMapping 

pub struct InputMapping {
    pub input: BrushInput,
    pub points: Vec<(f32, f32)>,
}

Fields

input: BrushInput

points: Vec<(f32, f32)>

(input_value, output_offset) knots. libmypaint requires x strictly ascending. Output is added to base_value after summing all inputs.

Implementations

impl InputMapping

pub fn new(input: BrushInput) -> InputMapping

pub fn eval(&self, x: f32) -> f32

Evaluate the piecewise-linear curve at x. Mirrors libmypaint’s mypaint_mapping_calculate (mypaint-mapping.c): starts with the first two knots, walks forward while x > x1, and if the resulting bracket has x0 == x1 or y0 == y1 returns y0 directly to dodge division by zero on duplicate-x knots (Dieterle/Posterizer’s opaque_multiply curve has [(0,0),(0,1),(1,1)] exactly).

Trait Implementations

impl Clone for InputMapping

fn clone(&self) -> InputMapping

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for InputMapping

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

Formats the value using the given formatter.

impl Default for InputMapping

fn default() -> InputMapping

Returns the “default value” for a type.

impl PartialEq for InputMapping

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for InputMapping