Enum StrokeMetric 

pub enum StrokeMetric {
    World,
    Clip,
}

Which space the stroke is measured in (ADR-0160) — the half-width, the join extensions and the direction all three are taken along.

A per-draw-call parameter rather than a per-instance field or a second pipeline: it rides the segment uniform’s v.w, a lane that was unused, so it costs no bytes, no bind-group entry and no new resource (ADR-0058).

Explicit at every call site rather than inferred from which entry point the caller used, so a producer that picks the wrong one is visible in its own source rather than implicit in a pipeline.

Variants

World

World space, the isotropic one: a world displacement (dx, dy) lands on (dx * H/2, dy * H/2) pixels whichever axis it is on, because dividing x by the aspect is exactly what squares the space up. So the half-width is a thickness on screen and the extension is a length on screen, at every orientation.

What the four line families pass, and what makes a producer’s world-space interior angle the angle the shader extends along (ADR-0158).

Clip

Clip space, the anisotropic one: one clip x unit is aspect times as many pixels as one clip y unit, so a vertical stroke is aspect times thicker on screen than a horizontal one at the same width.

warp_mesh is the one surface on it, and it is a dated deferral, not an endorsement — see the comment at its call site.

Trait Implementations

impl Clone for StrokeMetric

fn clone(&self) -> StrokeMetric

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StrokeMetric

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

Formats the value using the given formatter.

impl PartialEq for StrokeMetric

fn eq(&self, other: &StrokeMetric) -> 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 Copy for StrokeMetric

impl Eq for StrokeMetric

impl StructuralPartialEq for StrokeMetric