Minor improvements to Doxygen comments

platforms/opencl/src/OpenCLContext.h

@@ -168,13 +168,13 @@ public:
         return queue;
     }
     /**
-     * Get the array which contains the position and charge of each atom.
+     * Get the array which contains the position (the xyz components) and charge (the w component) of each atom.
      */
     OpenCLArray<mm_float4>& getPosq() {
         return *posq;
     }
     /**
-     * Get the array which contains the velocity and inverse mass of each atom.
+     * Get the array which contains the velocity (the xyz components) and inverse mass (the w component) of each atom.
      */
     OpenCLArray<mm_float4>& getVelm() {
         return *velm;

platforms/opencl/src/OpenCLIntegrationUtilities.h

@@ -49,7 +49,8 @@ public:
         return *posDelta;
     }
     /**
-     * Get the array which contains random values.
+     * Get the array which contains random values.  Each element is a float4, whose components
+     * are independent, normally distributed random numbers with mean 0 and variance 1.
      */
     OpenCLArray<mm_float4>& getRandom() {
         return *random;

platforms/opencl/src/OpenCLNonbondedUtilities.h

@@ -51,13 +51,13 @@ namespace OpenMM {
  * 1. Data structures (e.g. neighbor lists) are calculated to allow nonbonded interactions to be evaluated
  * quickly.
  *
- * 2. calcForces() or calcEnergy() is called on each ForceImpl in the System.
+ * 2. calcForcesAndEnergy() is called on each ForceImpl in the System.
  *
  * 3. Finally, the default interaction kernel is invoked to calculate all interactions that were added
  * to it.
  *
  * This sequence means that the default interaction kernel may depend on quantities that were calculated
- * by ForceImpls during calcForces() or calcEnergy().
+ * by ForceImpls during calcForcesAndEnergy().
  */
 
 class OPENMM_EXPORT OpenCLNonbondedUtilities {