cellAtPointfunction
The cell under a point of the drawing, or null where there is none: off the board, in the frame, on a hexagon's missing corner. On a board that wraps the ghost cells are the real ones they show. A point is in the nearest cell's hexagon on a honeycomb, which is the one it is in.
Import it
import { cellAtPoint } from "@johnmorrisdotca/tsunagi/draw";Definition
function cellAtPoint(geometry: TsunagiGeometry, x: number, y: number): number | nullParameters
| Name | Type | Description |
|---|---|---|
geometry | TsunagiGeometry | The board-to-pixel geometry. |
x | number | The horizontal point, edge-code or coordinate value specified by this signature. |
y | number | The vertical point, edge-code or coordinate value specified by this signature. |
Returns
number | null
The cell under a point of the drawing, or null where there is none: off the board, in the frame, on a hexagon's missing corner. On a board that wraps the ghost cells are the real ones they show. A point is in the nearest cell's hexagon on a honeycomb, which is the one it is in.
Examples
import { TSUNAGI_4 } from "@johnmorrisdotca/tsunagi/levels-4";
import { decodeLayout } from "@johnmorrisdotca/tsunagi";
import { cellAtPoint, tsunagiGeometry } from "@johnmorrisdotca/tsunagi/draw";
const givens = TSUNAGI_4[0][0];
const layout = decodeLayout(givens,4)!;
const geometry = tsunagiGeometry(layout);
console.log(cellAtPoint(geometry,geometry.centre(0).x,geometry.centre(0).y));0What it prints (run when this page was built)