Struct AtlasRegion 

pub struct AtlasRegion {
    pub page: usize,
    pub col: u32,
    pub row: u32,
}

Describes where a tile’s pixels are stored inside the atlas.

Returned by TileAtlas::insert and TileAtlas::get. The region is used by the batch builder (crate::gpu::batch) to remap each tile quad’s UVs from [0, 1] into the correct atlas sub-rectangle.

Fields

page: usize

Index of the atlas page (into TileAtlas::pages).

col: u32

Column of the slot within the page (0-based, max SLOTS_PER_SIDE-1).

row: u32

Row of the slot within the page (0-based, max SLOTS_PER_SIDE-1).

Implementations

impl AtlasRegion

pub fn remap_uv(&self, u: f32, v: f32) -> [f32; 2]

Remap a tile-local UV [0, 1] to an atlas-global UV.

Applies a half-texel inset so that bilinear sampling at slot edges never bleeds into the neighbouring slot.

Mapping

u' = (col + u) / slots_per_side   (+ half-texel inset)
v' = (row + v) / slots_per_side   (+ half-texel inset)

Trait Implementations

impl Clone for AtlasRegion

fn clone(&self) -> AtlasRegion

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AtlasRegion

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

Formats the value using the given formatter.

impl Copy for AtlasRegion