Use: if (rxx+ryy+rzz==3)

source/geometry/management/include/G4AffineTransform.icc

@@ -214,6 +214,7 @@ inline
 G4ThreeVector G4AffineTransform::TransformPoint(const G4ThreeVector& vec) const
 {
         G4double vecx = vec.x(), vecy = vec.y(), vecz = vec.z();
+    if (rxx + ryy + rzz == 3) return G4ThreeVector(vecx + tx, vecy + ty, vecz + tz);
         //if (NoRotation) return G4ThreeVector(vecx + tx, vecy + ty, vecz + tz);
         return G4ThreeVector(vecx*rxx + vecy*ryx + vecz*rzx + tx,
                              vecx*rxy + vecy*ryy + vecz*rzy + ty,
@@ -223,6 +224,7 @@ G4ThreeVector G4AffineTransform::TransformPoint(const G4ThreeVector& vec) const
 inline
 G4ThreeVector G4AffineTransform::TransformAxis(const G4ThreeVector& axis) const
 {
+    if (rxx + ryy + rzz == 3) return axis;
         //if (NoRotation) return axis;
         G4double axisx = axis.x(), axisy = axis.y(), axisz = axis.z();
         return G4ThreeVector(axisx*rxx + axisy*ryx + axisz*rzx,