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#include "FEDataStructures.h"
#include <iostream>
#include <mpi.h>
#include <assert.h>
Grid::Grid()
{
this->NumPoints[0] = this->NumPoints[1] = this->NumPoints[2] = 0;
this->Spacing[0] = this->Spacing[1] = this->Spacing[2] = 0;
}
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->NumPoints[i] = numPoints[i];
this->Spacing[i] = spacing[i];
}
int mpiRank = 0, mpiSize = 1;
MPI_Comm_rank(MPI_COMM_WORLD, &mpiRank);
MPI_Comm_size(MPI_COMM_WORLD, &mpiSize);
this->Extent[0] = mpiRank*numPoints[0]/mpiSize;
this->Extent[1] = (mpiRank+1)*numPoints[0]/mpiSize;
if(mpiSize != mpiRank+1)
{
this->Extent[1]++;
}
this->Extent[2] = this->Extent[4] = 0;
this->Extent[3] = numPoints[1];
this->Extent[5] = numPoints[2];
}
unsigned int Grid::GetNumberOfLocalPoints()
{
return (this->Extent[1]-this->Extent[0]+1)*(this->Extent[3]-this->Extent[2]+1)*
(this->Extent[5]-this->Extent[4]+1);
}
unsigned int Grid::GetNumberOfLocalCells()
{
return (this->Extent[1]-this->Extent[0])*(this->Extent[3]-this->Extent[2])*
(this->Extent[5]-this->Extent[4]);
}
void Grid::GetLocalPoint(unsigned int pointId, double* point)
{
unsigned int logicalX = pointId%(this->Extent[1]-this->Extent[0]+1);
assert(logicalX <= this->Extent[1]);
point[0] = this->Spacing[0]*logicalX;
unsigned int logicalY = pointId%((this->Extent[1]-this->Extent[0]+1)*(this->Extent[3]-this->Extent[2]+1));
logicalY /= this->Extent[1]-this->Extent[0]+1;
assert(logicalY <= this->Extent[3]);
point[1] = this->Spacing[1]*logicalY;
unsigned int logicalZ = pointId/((this->Extent[1]-this->Extent[0]+1)*
(this->Extent[3]-this->Extent[2]+1));
assert(logicalZ <= this->Extent[5]);
point[2] = this->Spacing[2]*logicalZ;
}
unsigned int* Grid::GetNumPoints()
{
return this->NumPoints;
}
unsigned int* Grid::GetExtent()
{
return this->Extent;
}
double* Grid::GetSpacing()
{
return this->Spacing;
}
Attributes::Attributes()
{
this->GridPtr = NULL;
}
void Attributes::Initialize(Grid* grid)
{
this->GridPtr = grid;
}
void Attributes::UpdateFields(double time)
{
unsigned int numPoints = this->GridPtr->GetNumberOfLocalPoints();
this->Velocity.resize(numPoints*3);
for(unsigned int pt=0;pt<numPoints;pt++)
{
double coord[3];
this->GridPtr->GetLocalPoint(pt, coord);
this->Velocity[pt] = coord[1]*time;
}
std::fill(this->Velocity.begin()+numPoints, this->Velocity.end(), 0.);
unsigned int 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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