Struct ScrollPhysics 

pub struct ScrollPhysics {
    pub friction: f32,
    pub stiffness: f32,
    pub damping: f32,
    pub rubber_band_limit: f32,
}

Configurable physics constants for ScrollState.

Not #[non_exhaustive]: unlike this crate’s enums, this type’s whole point is direct struct- literal construction, which #[non_exhaustive] would forbid for external crates (including via functional update syntax). Construct a custom value off ScrollPhysics::DEFAULT with functional update syntax instead of naming every field, so a field added here later needs at most a call-site addition rather than a rewrite:

use retroglyph_ui::state::ScrollPhysics;

let physics = ScrollPhysics { friction: 6.0, ..ScrollPhysics::DEFAULT };

Fields

friction: f32

Exponential friction decay constant. Higher means faster deceleration.

stiffness: f32

Stiffness of the overscroll spring.

damping: f32

Damping of the overscroll spring.

rubber_band_limit: f32

Maximum rows/cells the viewport can be rubber-banded past the edge.

Implementations

impl ScrollPhysics

pub const DEFAULT: Self

The default scroll physics parameters as a constant.

The spring pair (stiffness/damping) is close to but deliberately under critical damping: critical would be damping = 2 * sqrt(stiffness) = 2 * sqrt(180) ~= 26.8, and 24.0 sits just below that, so the rubber band settles with one small visible bounce rather than a dead stop. friction and the stiffness magnitude were tuned by feel for a row-per-item viewport at ~60fps, not derived; treat them as adjustable.

Trait Implementations

impl Clone for ScrollPhysics

fn clone(&self) -> ScrollPhysics

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ScrollPhysics

impl Debug for ScrollPhysics

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

Formats the value using the given formatter.

impl Default for ScrollPhysics

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for ScrollPhysics

fn eq(&self, other: &ScrollPhysics) -> 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 ScrollPhysics