Struct CellMap 

pub struct CellMap {
    pub cx0: i64,
    pub cy0: i64,
    pub cw: usize,
    pub ch: usize,
    pub rgbk: Vec<[u8; 4]>,
}

A CellRef built once from canvas pixels.

Fields

cx0: i64

cy0: i64

cw: usize

ch: usize

rgbk: Vec<[u8; 4]>

RGB + known flag per cell.

Implementations

impl CellMap

pub fn covering(x: i64, y: i64, width: usize, height: usize) -> Self

An empty map over the world cells covering the rectangle (x, y, width, height).

pub fn ingest(&mut self, view: &CanvasView<'_>)

Fills the cells lying wholly inside view whose four pixels are covered. Tiles are world-aligned on even coordinates, so a canvas fed tile by tile fills every wholly covered cell exactly once.

pub fn from_canvas(view: &CanvasView<'_>) -> Self

Trait Implementations

impl CellRef for CellMap

fn cell(&self, cx: i64, cy: i64) -> Option<[u8; 3]>

Mean colour of world cell (cx, cy) (world pixels 2cx..2cx+1, 2cy..2cy+1), if the whole cell is known.

fn cells(&self) -> (i64, i64, i64, i64)

World cell rectangle that may hold known cells: (cx0, cy0, cx1, cy1), half-open.