Function normalizeDashArrayY

src/util/decal.ts:402–413

* Convert dash input into dashArray * * @param {DecalDashArrayY} dash dash input * @return {number[]} normolized dash array

(dash: DecalDashArrayY)

 * @return {number[]} normolized dash array
 */
function normalizeDashArrayY(dash: DecalDashArrayY): number[] {
    if (!dash || typeof dash === 'object' && dash.length === 0) {
        return [0, 0];
    }
    if (isNumber(dash)) {
        const dashValue = Math.ceil(dash);
        return [dashValue, dashValue];
    }

    const dashValue = map(dash as number[], n => Math.ceil(n));
    return dash.length % 2 ? dashValue.concat(dashValue) : dashValue;
}

/**
 * Get block length of each line. A block is the length of dash line and space.