message: Address (possible) sign error in signedArea
diff: @@ -138,8 +138,10 @@ public:
  const PointType& C = m_points[2];
  // clang-format off
  - return 0.5 * determinant(C[0]-A[0], C[1]-A[1],
  - B[0]-A[0], B[1]-A[1]);
  + return 0.5 * determinant(B[0]-A[0], B[1]-A[1],
  + C[0]-A[0], C[1]-A[1]);
  + //return 0.5 * determinant(C[0]-A[0], C[1]-A[1],
  + // B[0]-A[0], B[1]-A[1]);
  // clang-format on
  }
  