v1.subtract(v2)v1v2v1.subtract(v2)v1.subtractX(v2v1v2v1.subtractX(v2)v1.subtractY(v2)v1v2v1.subtractY(v2)v1.subtractScalar(v2)v1v1.subtractScalar(2)v1.subtractScalarX(v2v1v1.subtractScalarX(2)v1.subtractScalarY(v2)v1v1.subtractScalarY(2)