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#include <stdio.h>
#include <mgl2/mpi.h>
#include <mpi.h>
int main(int argc, char *argv[])
{
mgl_textdomain(argv?argv[0]:NULL,"");
// initialize MPI
int rank=0, numproc=1;
MPI_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD,&numproc);
MPI_Comm_rank(MPI_COMM_WORLD,&rank);
if(rank==0) printf("Use %d processes.\n", numproc);
// initialize data similarly for all ranks
mglData a(128,128);
mglGraphMPI gr;
// do the same plot for its own range
char buf[64];
sprintf(buf,"xrange %g %g",2.*rank/numproc-1,2.*(rank+1)/numproc-1);
gr.Fill(a,"sin(2*pi*x)",buf);
// plot data in each rank
gr.Rotate(40,60);
gr.Surf(a,"",buf);
// collect information
if(rank!=0) gr.MPI_Send(0);
else for(int i=1;i<numproc;i++) gr.MPI_Recv(i);
if(rank==0)
{
gr.Box(); gr.Axis(); // some post processing
gr.WritePNG("test.png"); // save result
}
sprintf(buf,"test%d.png",rank);
gr.WritePNG(buf);
MPI_Finalize();
return 0;
}
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