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#include "FEDataStructures.h"
#include <mpi.h>
#include <stdio.h>
#include <stdlib.h>
void InitializeGrid(Grid* grid, const unsigned int numPoints[3], const double spacing[3])
{
grid->NumberOfPoints = 0;
grid->Points = 0;
grid->NumberOfCells = 0;
grid->Cells = 0;
if (numPoints[0] == 0 || numPoints[1] == 0 || numPoints[2] == 0)
{
printf("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
if (grid->Points != 0)
{
free(grid->Points);
}
unsigned int numXPoints = endXPoint - startXPoint;
grid->Points = (double*)malloc(3 * sizeof(double) * numPoints[1] * numPoints[2] * numXPoints);
unsigned int counter = 0;
unsigned int i, j, k;
for (i = startXPoint; i < endXPoint; i++)
{
for (j = 0; j < numPoints[1]; j++)
{
for (k = 0; k < numPoints[2]; k++)
{
grid->Points[counter] = i * spacing[0];
grid->Points[counter + 1] = j * spacing[1];
grid->Points[counter + 2] = k * spacing[2];
counter += 3;
}
}
}
grid->NumberOfPoints = numPoints[1] * numPoints[2] * numXPoints;
// create the hex cells
if (grid->Cells != 0)
{
free(grid->Cells);
}
grid->Cells = (int64_t*)malloc(
8 * sizeof(int64_t) * (numPoints[1] - 1) * (numPoints[2] - 1) * (numXPoints - 1));
counter = 0;
for (i = 0; i < numXPoints - 1; i++)
{
for (j = 0; j < numPoints[1] - 1; j++)
{
for (k = 0; k < numPoints[2] - 1; k++)
{
grid->Cells[counter] = i * numPoints[1] * numPoints[2] + j * numPoints[2] + k;
grid->Cells[counter + 1] = (i + 1) * numPoints[1] * numPoints[2] + j * numPoints[2] + k;
grid->Cells[counter + 2] =
(i + 1) * numPoints[1] * numPoints[2] + (j + 1) * numPoints[2] + k;
grid->Cells[counter + 3] = i * numPoints[1] * numPoints[2] + (j + 1) * numPoints[2] + k;
grid->Cells[counter + 4] = i * numPoints[1] * numPoints[2] + j * numPoints[2] + k + 1;
grid->Cells[counter + 5] = (i + 1) * numPoints[1] * numPoints[2] + j * numPoints[2] + k + 1;
grid->Cells[counter + 6] =
(i + 1) * numPoints[1] * numPoints[2] + (j + 1) * numPoints[2] + k + 1;
grid->Cells[counter + 7] = i * numPoints[1] * numPoints[2] + (j + 1) * numPoints[2] + k + 1;
counter += 8;
}
}
}
grid->NumberOfCells = (numPoints[1] - 1) * (numPoints[2] - 1) * (numXPoints - 1);
}
void FinalizeGrid(Grid* grid)
{
if (grid->Points)
{
free(grid->Points);
grid->Points = 0;
}
if (grid->Cells)
{
free(grid->Cells);
grid->Cells = 0;
}
grid->NumberOfPoints = 0;
grid->NumberOfCells = 0;
}
void InitializeAttributes(Attributes* attributes, Grid* grid)
{
attributes->GridPtr = grid;
attributes->Velocity = 0;
attributes->Pressure = 0;
}
void UpdateFields(Attributes* attributes, double time)
{
unsigned int numPoints = attributes->GridPtr->NumberOfPoints;
if (attributes->Velocity != 0)
{
free(attributes->Velocity);
}
attributes->Velocity = (double*)malloc(sizeof(double) * numPoints * 3);
unsigned int i;
for (i = 0; i < numPoints; i++)
{
attributes->Velocity[i] = 0;
attributes->Velocity[i + numPoints] = attributes->GridPtr->Points[i * 3 + 1] * time;
attributes->Velocity[i + 2 * numPoints] = 0;
}
unsigned int numCells = attributes->GridPtr->NumberOfCells;
if (attributes->Pressure != 0)
{
free(attributes->Pressure);
}
attributes->Pressure = (float*)malloc(sizeof(float) * numCells);
for (i = 0; i < numCells; i++)
{
attributes->Pressure[i] = (float)time / 2.0;
}
}
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