DeviceCode/Doublets.hpp

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/**
 * @file
 * Defines CUDA Device code for MPC fluids consisting out of MPC-particle doublets.
 */
 
#ifndef OPENMPCD_CUDA_MPCFLUID_DEVICECODE_DOUBLETS_HPP
#define OPENMPCD_CUDA_MPCFLUID_DEVICECODE_DOUBLETS_HPP
 
#include <OpenMPCD/Types.hpp>
#include <OpenMPCD/Vector3D.hpp>
 
namespace OpenMPCD
{
namespace CUDA
{
namespace MPCFluid
{
namespace DeviceCode
{
    /**
     * Saves the center-of-mass velocities of the MPC fluid's doublets to the given buffer.
     * @param[in]  mpcParticleCount The number of individual MPC fluid particles.
     * @param[in]  velocities       The Device array of MPC fluid particle velocities.
     * @param[out] comVelocities    Device buffer where the center-of-mass velocities are saved.
     */
    void getCenterOfMassVelocities_doublet(
        const unsigned int mpcParticleCount,
        const MPCParticleVelocityType* const velocities,
        MPCParticleVelocityType* const comVelocities);
 
    /**
     * Saves the center-of-mass velocities of the MPC fluid's doublets to the given buffer.
     * @param[in]  workUnitOffset The number of trimers to skip.
     * @param[in]  velocities     The array of MPC fluid particle velocities.
     * @param[out] comVelocities  Buffer where the center-of-mass velocities are saved.
     */
    __global__ void getCenterOfMassVelocities_doublet_kernel(
        const unsigned int workUnitOffset,
        const MPCParticleVelocityType* const velocities,
        MPCParticleVelocityType* const comVelocities);
 
    /**
     * Returns the center-of-mass velocity of for the given doublet.
     * This function assumes that both constituents have the same mass.
     * @param[in] doubletID  The ID of the doublet.
     * @param[in] velocities The array of MPC fluid particle velocities.
     */
    __device__ Vector3D<MPCParticleVelocityType> getCenterOfMassVelocity_doublet(
        const unsigned int doubletID,
        const MPCParticleVelocityType* const velocities);
} //namespace DeviceCode
} //namespace MPCFluid
} //namespace CUDA
} //namespace OpenMPCD
 
#endif