Struct Eclipse 

pub struct Eclipse { /* private fields */ }

A stippled eclipse in the brand palette.

An analytic rim arc pinned to the viewport’s top and right edges, a sky/violet/plum corona regenerating on a 90-frame cycle, rim glimmer, migrating silver dust, film grain, and a vignette.

Use it as a full-viewport backdrop — mount it with crate::components::Shader, or drive it through Surface::render under hand-painted chrome. The field is opaque everywhere, so it always paints the whole target. Every distance derives from sqrt(area / DESIGN_AREA), exactly as on the web, so the geometry adapts to any viewport. All state is recomputed in Program::advance — the CPU twin of the WGSL Scene uniform — making frames a pure function of the clock.

The GPU original draws stipple sites at 2×2 physical pixels and adds a barely-there monochrome grade pass; here every half-block pixel is a stipple site and the grade is dropped — it sits below one terminal color step.

Trait Implementations

impl Default for Eclipse

fn default() -> Eclipse

Returns the “default value” for a type.

impl Program for Eclipse

fn advance(&mut self, now: Duration, width: f32, height: f32)

Advances animation state to now for a width × height pixel target. Runs once per frame before any sampling.

fn fragment(&self, x: f32, y: f32) -> (Vec3, f32)

Shades the pixel centered at (x, y): (color, coverage), both in unit range.

fn particles(&self, emit: &mut dyn FnMut(f32, f32, Vec3, f32))

Emits point sprites as emit(x, y, color, alpha); each blends over the shaded field at its nearest pixel. Off-target sprites are ignored.