Fixed a potential divide by zero

24cb7109 · peastman · e8718a1f · 24cb7109
Commit 24cb7109 authored Mar 27, 2014 by peastman
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Showing with 5 additions and 2 deletions

wrappers/python/simtk/openmm/app/statedatareporter.py wrappers/python/simtk/openmm/app/statedatareporter.py +5 -2

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--- a/wrappers/python/simtk/openmm/app/statedatareporter.py
+++ b/wrappers/python/simtk/openmm/app/statedatareporter.py
@@ -201,9 +201,12 @@ class StateDataReporter(object):
        if self._density:
            values.append((self._totalMass/volume).value_in_unit(unit.gram/unit.item/unit.milliliter))
        if self._speed:
-            elapsedDays = (clockTime-self._initialClockTime)/86400
+            elapsedDays = (clockTime-self._initialClockTime)/86400.0
            elapsedNs = (state.getTime()-self._initialSimulationTime).value_in_unit(unit.nanosecond)
-            values.append('%.3g' % (elapsedNs/elapsedDays))
+            if elapsedDays > 0.0:
+                values.append('%.3g' % (elapsedNs/elapsedDays))
+            else:
+                values.append('--')
        if self._remainingTime:
            elapsedSeconds = clockTime-self._initialClockTime
            elapsedSteps = simulation.currentStep-self._initialSteps