DeviceCode/GaussianRods.hpp

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/**
 * @file
 * Defines CUDA Device code for OpenMPCD::CUDA::MPCFluid::GaussianRods
 */
 
#ifndef OPENMPCD_CUDA_MPCFLUID_DEVICECODE_GAUSSIANRODS_HPP
#define OPENMPCD_CUDA_MPCFLUID_DEVICECODE_GAUSSIANRODS_HPP
 
#include <OpenMPCD/Types.hpp>
 
namespace OpenMPCD
{
namespace CUDA
{
namespace MPCFluid
{
namespace DeviceCode
{
    /**
     * Streams the given Gaussian Rod by applying the velocity-Verlet algorithm.
     * No boundary conditions are considered.
     * @param[in]     particle1ID           The ID of the first particle; the partner is the one
     *                                      with this ID incremented by 1.
     * @param[in,out] positions             The array of MPC fluid particle positions.
     * @param[in,out] velocities            The array of MPC fluid particle velocities.
     * @param[in]     meanBondLength        The mean bond length.
     * @param[in]     reducedSpringConstant The spring constant, divided by the mass of an
     *                                      individual spring constituent particle.
     * @param[in]     timestep              The timestep for an individual velocity-Verlet step.
     * @param[in]     stepCount             The number of velocity-Verlet steps to perform.
     */
    __device__ void streamGaussianRodVelocityVerlet(
        const unsigned int particle1ID,
        MPCParticlePositionType* const positions,
        MPCParticleVelocityType* const velocities,
        const FP meanBondLength,
        const FP reducedSpringConstant,
        const FP timestep,
        const unsigned int stepCount);
 
    /**
     * Streams the dumbbells by applying the velocity-Verlet algorithm.
     * No boundary conditions are considered.
     * @param[in]     workUnitOffset        The number of dumbbells to skip.
     * @param[in,out] positions             The array of MPC fluid particle positions.
     * @param[in,out] velocities            The array of MPC fluid particle velocities.
     * @param[in]     meanBondLength        The mean bond length.
     * @param[in]     reducedSpringConstant The spring constant, divided by the mass of an
     *                                      individual spring constituent particle.
     * @param[in]     timestep              The timestep for an individual velocity-Verlet step.
     * @param[in]     stepCount             The number of velocity-Verlet steps to perform.
     */
    __global__ void streamGaussianRodsVelocityVerlet(
        const unsigned int workUnitOffset,
        MPCParticlePositionType* const positions,
        MPCParticleVelocityType* const velocities,
        const FP meanBondLength,
        const FP reducedSpringConstant,
        const FP timestep,
        const unsigned int stepCount);
} //namespace DeviceCode
} //namespace MPCFluid
} //namespace CUDA
} //namespace OpenMPCD
 
#endif