From 30f3d5e88657ff13456fd833a8456cb0d493754d Mon Sep 17 00:00:00 2001
From: Will Bainbridge <http://cfd.direct>
Date: Wed, 8 Jan 2020 12:53:48 +0000
Subject: [PATCH] molecule: Updated transformations for position data

---
 .../molecularDynamics/molecule/molecule/molecule.C        | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/src/lagrangian/molecularDynamics/molecule/molecule/molecule.C b/src/lagrangian/molecularDynamics/molecule/molecule/molecule.C
index 827785562e..fd3c551720 100644
--- a/src/lagrangian/molecularDynamics/molecule/molecule/molecule.C
+++ b/src/lagrangian/molecularDynamics/molecule/molecule/molecule.C
@@ -204,13 +204,11 @@ void Foam::molecule::transformProperties(const transformer& transform)
 
     transform.transformList(siteForces_);
 
-    vectorField sitePositions(sitePositions_ - position());
-    transform.transformPosition(sitePositions, sitePositions);
-    sitePositions_ = sitePositions + position();
+    sitePositions_ = transform.transformPosition(vectorField(sitePositions_));
 
-    if (transform.translates() && special_ == SPECIAL_TETHERED)
+    if (special_ == SPECIAL_TETHERED)
     {
-        specialPosition_ += transform.t();
+        specialPosition_ = transform.transformPosition(specialPosition_);
     }
 }