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#include "FEDataStructures.h"
#include <mpi.h>
#include <iostream>
Grid::Grid()
{}
void Grid::Initialize(const unsigned int numPoints[3], const double spacing[3] )
{
if(numPoints[0] == 0 || numPoints[1] == 0 || numPoints[2] == 0)
{
std::cerr << "Must have a non-zero amount of points in each direction.\n";
}
// in parallel, we do a simple partitioning in the x-direction.
int mpiSize = 1;
int mpiRank = 0;
MPI_Comm_rank(MPI_COMM_WORLD, &mpiRank);
MPI_Comm_size(MPI_COMM_WORLD, &mpiSize);
unsigned int startXPoint = mpiRank*numPoints[0]/mpiSize;
unsigned int endXPoint = (mpiRank+1)*numPoints[0]/mpiSize;
if(mpiSize != mpiRank+1)
{
endXPoint++;
}
// create the points -- slowest in the x and fastest in the z directions
double coord[3] = {0,0,0};
for(unsigned int i=startXPoint;i<endXPoint;i++)
{
coord[0] = i*spacing[0];
for(unsigned int j=0;j<numPoints[1];j++)
{
coord[1] = j*spacing[1];
for(unsigned int k=0;k<numPoints[2];k++)
{
coord[2] = k*spacing[2];
// add the coordinate to the end of the vector
std::copy(coord, coord+3, std::back_inserter(this->Points));
}
}
}
// create the hex cells
unsigned int cellPoints[8];
unsigned int numXPoints = endXPoint - startXPoint;
for(unsigned int i=0;i<numXPoints-1;i++)
{
for(unsigned int j=0;j<numPoints[1]-1;j++)
{
for(unsigned int k=0;k<numPoints[2]-1;k++)
{
cellPoints[0] = i*numPoints[1]*numPoints[2] +
j*numPoints[2] + k;
cellPoints[1] = (i+1)*numPoints[1]*numPoints[2] +
j*numPoints[2] + k;
cellPoints[2] = (i+1)*numPoints[1]*numPoints[2] +
(j+1)*numPoints[2] + k;
cellPoints[3] = i*numPoints[1]*numPoints[2] +
(j+1)*numPoints[2] + k;
cellPoints[4] = i*numPoints[1]*numPoints[2] +
j*numPoints[2] + k+1;
cellPoints[5] = (i+1)*numPoints[1]*numPoints[2] +
j*numPoints[2] + k+1;
cellPoints[6] = (i+1)*numPoints[1]*numPoints[2] +
(j+1)*numPoints[2] + k+1;
cellPoints[7] = i*numPoints[1]*numPoints[2] +
(j+1)*numPoints[2] + k+1;
std::copy(cellPoints, cellPoints+8, std::back_inserter(this->Cells));
}
}
}
}
size_t Grid::GetNumberOfPoints()
{
return this->Points.size()/3;
}
size_t Grid::GetNumberOfCells()
{
return this->Cells.size()/8;
}
double* Grid::GetPointsArray()
{
if(this->Points.empty())
{
return NULL;
}
return &(this->Points[0]);
}
double* Grid::GetPoint(size_t pointId)
{
if(pointId >= this->Points.size())
{
return NULL;
}
return &(this->Points[pointId*3]);
}
unsigned int* Grid::GetCellPoints(size_t cellId)
{
if(cellId >= this->Cells.size())
{
return NULL;
}
return &(this->Cells[cellId*8]);
}
Attributes::Attributes()
{
this->GridPtr = NULL;
}
void Attributes::Initialize(Grid* grid)
{
this->GridPtr = grid;
}
void Attributes::UpdateFields(double time)
{
size_t numPoints = this->GridPtr->GetNumberOfPoints();
this->Velocity.resize(numPoints*3);
for(size_t pt=0;pt<numPoints;pt++)
{
double* coord = this->GridPtr->GetPoint(pt);
this->Velocity[pt] = coord[1]*time;
//this->Velocity[pt] = time;
}
std::fill(this->Velocity.begin()+numPoints, this->Velocity.end(), 0.);
size_t numCells = this->GridPtr->GetNumberOfCells();
this->Pressure.resize(numCells);
std::fill(this->Pressure.begin(), this->Pressure.end(), 1.);
}
double* Attributes::GetVelocityArray()
{
if(this->Velocity.empty())
{
return NULL;
}
return &this->Velocity[0];
}
float* Attributes::GetPressureArray()
{
if(this->Pressure.empty())
{
return NULL;
}
return &this->Pressure[0];
}
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