Function mod

src/lib/mod.js:7–10

* sanitized modulus function that always returns in the range [0, d) * rather than (-d, 0] if v is negative

(v, d)

 * rather than (-d, 0] if v is negative
 */
function mod(v, d) {
    var out = v % d;
    return out < 0 ? out + d : out;
}

/**
 * sanitized modulus function that always returns in the range [-d/2, d/2]