Only call kCalculateCMAPTorsionForces() if numTorsions > 0

5adaa15e · Mark Friedrichs · b66af9aa · 5adaa15e
Commit 5adaa15e authored Mar 07, 2011 by Mark Friedrichs
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platforms/cuda/src/CudaKernels.cpp platforms/cuda/src/CudaKernels.cpp +2 -1

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--- a/platforms/cuda/src/CudaKernels.cpp
+++ b/platforms/cuda/src/CudaKernels.cpp
@@ -645,7 +645,8 @@ void CudaCalcCMAPTorsionForceKernel::initialize(const System& system, const CMAP
 }
 double CudaCalcCMAPTorsionForceKernel::execute(ContextImpl& context, bool includeForces, bool includeEnergy) {
-    kCalculateCMAPTorsionForces(data.gpu, *coefficients, *mapPositions, *torsionIndices, *torsionMaps);
+    if( numTorsions )
+        kCalculateCMAPTorsionForces(data.gpu, *coefficients, *mapPositions, *torsionIndices, *torsionMaps);
    return 0.0;
 }