Fix accessing empty JointPosition component in lift drag plugin (#1366)

Check for empty JointControl component before accessing it Signed-off-by: Ian Chen <[email protected]>
gazebosim · Feb 25, 2022 · 0ae1324 · 0ae1324
1 parent d3a5015
commit 0ae1324
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/systems/lift_drag/LiftDrag.cc b/src/systems/lift_drag/LiftDrag.cc
@@ -382,7 +382,7 @@ void LiftDragPrivate::Update(EntityComponentManager &_ecm)
     cl = this->cla * alpha * cosSweepAngle;
 
   // modify cl per control joint value
-  if (controlJointPosition)
+  if (controlJointPosition && !controlJointPosition->Data().empty())
   {
     cl = cl + this->controlJointRadToCL * controlJointPosition->Data()[0];
     /// \todo(anyone): also change cm and cd