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#include "FEDataStructures.h"
#include <iostream>
#include <mpi.h>
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";
}
for (int i = 0; i < 3; i++)
{
this->Extents[i * 2] = 0;
this->Extents[i * 2 + 1] = numPoints[i];
this->Spacing[i] = spacing[i];
}
// 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);
this->Extents[0] = mpiRank * numPoints[0] / mpiSize;
this->Extents[1] = (mpiRank + 1) * numPoints[0] / mpiSize;
}
unsigned int Grid::GetNumberOfLocalPoints()
{
return (this->Extents[1] - this->Extents[0] + 1) * (this->Extents[3] - this->Extents[2] + 1) *
(this->Extents[5] - this->Extents[4] + 1);
}
unsigned int Grid::GetNumberOfLocalCells()
{
return (this->Extents[1] - this->Extents[0]) * (this->Extents[3] - this->Extents[2]) *
(this->Extents[5] - this->Extents[4]);
}
void Grid::GetPoint(unsigned int logicalLocalCoords[3], double coord[3])
{
coord[0] = (this->Extents[0] + logicalLocalCoords[0]) * this->Spacing[0];
coord[1] = logicalLocalCoords[1] * this->Spacing[1];
coord[2] = logicalLocalCoords[2] * this->Spacing[2];
}
double* Grid::GetSpacing()
{
return this->Spacing;
}
unsigned int* Grid::GetExtents()
{
return this->Extents;
}
Attributes::Attributes()
{
this->GridPtr = NULL;
}
void Attributes::Initialize(Grid* grid)
{
this->GridPtr = grid;
}
void Attributes::UpdateFields(double time)
{
size_t numPoints = this->GridPtr->GetNumberOfLocalPoints();
this->Velocity.resize(numPoints * 3);
unsigned int* extents = this->GridPtr->GetExtents();
unsigned int logicalLocalCoords[3];
size_t pt = 0;
for (unsigned int k = 0; k < extents[5] - extents[4] + 1; k++)
{
logicalLocalCoords[2] = k;
for (unsigned int j = 0; j < extents[3] - extents[2] + 1; j++)
{
logicalLocalCoords[1] = j;
for (unsigned int i = 0; i < extents[1] - extents[0] + 1; i++)
{
logicalLocalCoords[0] = i;
double coord[3];
this->GridPtr->GetPoint(logicalLocalCoords, coord);
this->Velocity[pt] = coord[1] * time;
pt++;
}
}
}
std::fill(this->Velocity.begin() + numPoints, this->Velocity.end(), 0.);
size_t numCells = this->GridPtr->GetNumberOfLocalCells();
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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