discontinuedPackage jet_cad_floor_plan has been discontinued and replaced by jet_cad_2d_plan.

isOrthonormal function

bool isOrthonormal(
  1. Transform2 g
)

Whether g's linear part is orthonormal (spec 09c W-8, S-10): |a² + b² − 1|, |c² + d² − 1| and |ac + bd| each at most Tolerance.standard.linear. A mirror is orthonormal; a scale is not.

Implementation

bool isOrthonormal(Transform2 g) {
  final tol = Tolerance.standard.linear;
  return (g.a * g.a + g.b * g.b - 1).abs() <= tol &&
      (g.c * g.c + g.d * g.d - 1).abs() <= tol &&
      (g.a * g.c + g.b * g.d).abs() <= tol;
}