Function yCorners

src/plots/cartesian/dragbox.js:1225–1231

(box, x0)

}

function yCorners(box, x0) {
    return 'M' +
        (x0 - MINZOOM - 0.5) + ',' + (box.t - 0.5) +
        'v-3h' + (2 * MINZOOM + 1) + 'v3ZM' +
        (x0 - MINZOOM - 0.5) + ',' + (box.b + 0.5) +
        'v3h' + (2 * MINZOOM + 1) + 'v-3Z';
}

function xyCorners(box) {
    var clen = Math.floor(Math.min(box.b - box.t, box.r - box.l, MINZOOM) / 2);