Function add

packages/sanddance/src/axisSelection.ts:94–101

(p2: number, i: number)

        }

        const add = (p2: number, i: number) => {
            const coords: VegaDeckGl.Position[] = [[p1, q1], [p2, q1], [p2, q2], [p1, q2]];
            polygons.push({
                search: getSearch(axis, column, i),
                polygon: vertical ? coords.map(xy => xy.reverse() as VegaDeckGl.Position) : coords,
            });
            p1 = p2;
        };

        let p1 = domain.sourcePosition[dim];
        const q1 = domain.sourcePosition[vertical ? 0 : 1];