Struct FrameGeom 

pub struct FrameGeom {
    pub fit: (f32, f32, f32),
    pub look: [f32; 2],
    pub density: f32,
    pub viewport_px: [f32; 2],
    pub roll: f32,
    pub pivot: [f32; 2],
}

One painted frame’s geometry, shared between Viewport2d / Viewport2dGpu (writers) and world-anchored siblings like ActorFrame (readers). Everything needed to map either direction, so board sprites, picks, and actor surfaces stay glued - including under camera shake.

Timing: the GPU viewport publishes size/fit/look at layout (ahead of prepare, so resizes apply the same frame) and re-publishes at paint; canvas publishes at draw. Composition-time readers (ActorFrame offsets) still see the previous frame’s geometry — math is exact, placement trails the board by one frame under camera motion. Event-time readers (picks) always see the latest publish.

Fields

fit: (f32, f32, f32)

Effective dp fit of the world extent: (scale, off_x, off_y) from effective_fit (contain-fit scaled by zoom/units_per_pixel).

look: [f32; 2]

Look-point shift in world units: cam.effective_center() - world / 2 (rest + offset shake included; zero when the camera is default).

density: f32

Physical px per dp at paint time.

viewport_px: [f32; 2]

Painted viewport size in physical px (drives the GPU camera).

roll: f32

Camera roll in radians around the look point.

pivot: [f32; 2]

Camera look point in world coords (cam.effective_center() at publish time). Roll pivot for surface_dp and picks.

Trait Implementations

impl Clone for FrameGeom

fn clone(&self) -> FrameGeom

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FrameGeom

impl Debug for FrameGeom

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

Formats the value using the given formatter.

impl Default for FrameGeom

fn default() -> Self

Returns the “default value” for a type.

impl From<FrameGeom> for GeomHandle

fn from(g: FrameGeom) -> Self

Converts to this type from the input type.