/* ----------------------------------------------------------------------
   LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator 

   Original Version:
   http://lammps.sandia.gov, Sandia National Laboratories
   Steve Plimpton, sjplimp@sandia.gov 

   See the README file in the top-level LAMMPS directory. 

   ----------------------------------------------------------------------- 

   USER-CUDA Package and associated modifications:
   https://sourceforge.net/projects/lammpscuda/ 

   Christian Trott, christian.trott@tu-ilmenau.de
   Lars Winterfeld, lars.winterfeld@tu-ilmenau.de
   Theoretical Physics II, University of Technology Ilmenau, Germany 

   See the README file in the USER-CUDA directory. 

   This software is distributed under the GNU General Public License.
------------------------------------------------------------------------- */

__global__ void Cuda_FixViscousCuda_PostForce_Kernel(int groupbit,F_FLOAT* gamma)
{
   int i=(blockIdx.x*gridDim.y+blockIdx.y)*blockDim.x+threadIdx.x;
 
   if(i < _nlocal)
    if (_mask[i] & groupbit) {
      F_FLOAT drag = gamma[_type[i]];
      _f[i] -= drag*_v[i];
      _f[i+1*_nmax] -= drag*_v[i+1*_nmax];
      _f[i+2*_nmax] -= drag*_v[i+2*_nmax];
    }
}
