Struct ScanlineParams 

pub struct ScanlineParams {
    pub enabled: bool,
    pub intensity: f32,
    pub line_width: f32,
    pub spacing: u32,
    pub horizontal: bool,
    pub vsync_wobble: f32,
    pub persistence: f32,
    pub smoothness: f32,
    pub tint: [f32; 3],
}

CRT scanline pass parameters.

Fields

enabled: bool

intensity: f32

Brightness reduction for scanline pixels (0.0 = no effect, 0.5 = half brightness).

line_width: f32

How many pixels per scanline period (1.0 = every other pixel, 2.0 = every 2 pixels).

spacing: u32

Number of screen lines between darkened scanlines (1 = every other, 2 = every 3rd).

horizontal: bool

Scanline orientation: true = horizontal (CRT rows), false = vertical (rotated CRT).

vsync_wobble: f32

Vertical sync wobble amplitude in pixels (0.0 = none, simulates V-sync instability).

persistence: f32

Phosphor persistence: darkened areas slightly glow after scan (0.0 = none, 1.0 = strong).

smoothness: f32

Curvature of the scanline intensity: 0.0 = sharp, 1.0 = smooth gradient.

tint: [f32; 3]

Scanline color tint (for color CRT monitors, slight green/cyan tint).

Implementations

impl ScanlineParams

pub fn none() -> Self

Disabled (no scanlines).

pub fn subtle() -> Self

Subtle scanlines (barely visible, just adds texture).

pub fn arcade() -> Self

Classic arcade CRT (strong scanlines, slight green tint, minimal wobble).

pub fn damaged() -> Self

Damaged CRT (heavy scanlines, V-sync wobble, strong persistence).

pub fn lofi() -> Self

Wide-spaced scanlines for a lo-fi effect.

pub fn lerp(a: &Self, b: &Self, t: f32) -> Self

Lerp between two scanline configs.

pub fn evaluate(&self, pixel_y: f32, screen_height: f32, time: f32) -> f32

CPU preview: evaluate the scanline dimming factor for a pixel at screen Y position.

Returns a multiplier in [0, 1] — multiply pixel brightness by this value. pixel_y is the pixel row (0 = top), screen_height is total height. time drives V-sync wobble animation.

Trait Implementations

impl Clone for ScanlineParams

fn clone(&self) -> ScanlineParams

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ScanlineParams

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

Formats the value using the given formatter.

impl Default for ScanlineParams

fn default() -> Self

Returns the “default value” for a type.