zero A vector object with zero length. Declarationclass var zero: VNVector { get } See AlsoCreating a Vectorinit(byAdding:to:)init(byAddingVector:toVector:)init(bySubtracting:from:)init(bySubtractingVector:fromVector:)init(byMultiplying:byScalar:)init(byMultiplyingVector:byScalar:)init(r:theta:)init(vectorHead:tail:)init(XComponent:yComponent:)init(xComponent:yComponent:)init(coder:)