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Parallel_Mandelbrot/gather.cpp Normal file
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#include <iostream>
#include <mpi.h>
#include <unistd.h>
#include <stdlib.h>
//#include "/usr/local/include/mpi.h"
#define MCW MPI_COMM_WORLD
using namespace std;
int main(int argc, char **argv){
int rank, size;
int data;
int bigData[16];
MPI_Init(&argc, &argv);
MPI_Comm_rank(MCW, &rank);
MPI_Comm_size(MCW, &size);
data = rank;
MPI_Gather(&data,1,MPI_INT,bigData,1,MPI_INT,0,MCW);
if(rank == 0)for(int i=0;i<size;++i)cout<<bigData[i];
cout<<endl;
MPI_Finalize();
return 0;
}

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Parallel_Mandelbrot/main.cpp Normal file
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#include <cmath>
#include <fstream>
#include <iomanip>
#include <iostream>
#include <mpi.h>
#include <string>
#include <vector>
///
/// http://wili.cc/blog/mandelbrot-mpi.html
///
#define MCW MPI_COMM_WORLD
using namespace std;
const int Master = 0;
struct Color {
int red;
int green;
int blue;
};
struct MandelbrotConfig {
int width;
int height;
double xComplexMin;
double xComplexMax;
double yComplexMin;
double yComplexMax;
double maxIterations;
Color colorOne;
Color colorTwo;
string outputFileName;
};
MandelbrotConfig readConfig(string configFile){
ifstream fin;
MandelbrotConfig config;
fin.open(configFile);
if (fin){
fin >> config.width >> config.height;
fin >> config.xComplexMin >> config.xComplexMax;
fin >> config.yComplexMin >> config.yComplexMax;
fin >> config.maxIterations;
fin >> config.colorOne.red >> config.colorOne.green >> config.colorOne.blue;
fin >> config.colorTwo.red >> config.colorTwo.green >> config.colorTwo.blue;
fin >> config.outputFileName;
fin.close();
}
if(!fin){
cout << "Could not open File";
}
return config;
}
Color getPixelColor(Color color1, Color color2, double iterations, double maxIterations) {
Color colorReturn;
double myColorR = static_cast<double>((color2.red - color1.red) / maxIterations);
double myColorG = static_cast<double>((color2.green - color1.green) / maxIterations);
double myColorB = static_cast<double>((color2.blue - color1.blue) / maxIterations);
colorReturn.red = (color1.red + (iterations * myColorR));
colorReturn.green = (color1.green + (iterations * myColorG));
colorReturn.blue = (color1.blue + (iterations * myColorB));
return colorReturn;
}
void writeFile(MandelbrotConfig config, std::vector<std::vector<Color> > array){
ofstream fout;
fout.open(config.outputFileName);
fout << "P3" << endl;
fout << config.width << " " << config.height << endl;
fout << "255" << endl;
for(int i = 0; i < config.height; i++){
for(int j = 0; j < config.width; j++){
Color Pixel = array[i][j];
fout << Pixel.red << " " << Pixel.green << " " << Pixel.blue << " ";
}
fout << endl;
}
fout.close();
}
void drawMandelbrot(MandelbrotConfig config, int rank, int &worldsize){
double pixelWidth = ((config.xComplexMax-config.xComplexMin)/config.width);
double pixelHeight = ((config.yComplexMax-config.yComplexMin)/config.height);
std::vector<std::vector<Color> > pixels(config.height, std::vector<Color> (config.width));
std::vector<Color> sub_pixels;
int *displace;
displace = (int *)calloc(worldsize,sizeof(int));
int *dim_list;
dim_list = (int *)calloc(worldsize,sizeof(int));
int j = 0;
for (int i=0; i<worldsize; i++) {
displace[i] = j;
cout << "displace[" << i << "] = " << displace[i] << endl;
j += config.width;
dim_list[i] = config.width;
}
MPI_Scatterv(&(pixels), sendcounts, displs, MPI_INT, &sub_pixels,
100, MPI_INT, 0, MCW);
for(int i = 0; i < config.height; i++) {
int _i = i * (rank + 1);
for (int j = 0; j < config.width; j++) {
double x0 = config.xComplexMin + j * pixelWidth;
double y0 = config.yComplexMin + _i * pixelHeight;
double x = 0;
double y = 0;
double iteration = 0;
while ((x * x) + (y * y) < (2 * 2) && iteration < config.maxIterations) {
double xtemp = (x * x) - (y * y) + x0;
y = 2 * x * y + y0;
x = xtemp;
iteration = iteration + 1;
}
Color Pixel = getPixelColor(config.colorOne, config.colorTwo, iteration,
config.maxIterations);
pixels[i][j] = Pixel;
}
}
if (!rank) {
MPI_Gatherv(&sub_pixels,config.width,MPI_INT,&pixels,&dim_list[rank],&displace[rank],MPI_INT,0,MPI_COMM_WORLD);
}
writeFile(config, pixels);
}
int main(int argc, char *argv[]) {
string configFile;
MandelbrotConfig config;
int rank , size;
int data;
MPI_Init (&argc , &argv);
MPI_Comm_rank(MCW , &rank);
MPI_Comm_size(MCW , &size);
if(rank == 0) {
// Read in config file location from user
cout << "Mandelbrot Config File: ";
cin >> configFile;
// Read config file contents into MandelbrotConfig struct instance
config = readConfig(configFile);
// Compute and write specified mandelbrot image to PPM file
// drawMandelbrot(config);
}
drawMandelbrot(config, rank, size);
MPI_Finalize();
return 0;
}

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Parallel_Mandelbrot/scatter.cpp Normal file
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#include <iostream>
#include <mpi.h>
#include <unistd.h>
#include <stdlib.h>
//#include "/usr/local/include/mpi.h"
#define MCW MPI_COMM_WORLD
using namespace std;
int main(int argc, char **argv){
int rank, size;
int data;
int bigData[16];
cout << rank;
if(!rank)cout << endl << rank;for(int i=0;i<16;++i)bigData[i]=i;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MCW, &rank);
MPI_Comm_size(MCW, &size);
MPI_Scatter(bigData,1,MPI_INT,&data,1,MPI_INT,0,MCW);
cout<<"rank"<<rank<<" "<<data<<endl;
MPI_Finalize();
return 0;
}

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Parallel_Mandelbrot/seahorse.txt Normal file
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512 512
- 0.75 -0.74
0.1 0.11
1000
255 165 0
0 0 64
seahorse.ppm

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Parallel_Mandelbrot/testGather.cpp Normal file
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