2: static char help[] = "Tests DMCreateColoring() in 3d.\n\n";

  4: #include <petscmat.h>
  5: #include <petscdm.h>
  6: #include <petscdmda.h>

 10: int main(int argc,char **argv)
 11: {
 12:   PetscInt        i,M = 3,N = 5,P=3,s=1,w=2,m = PETSC_DECIDE,n = PETSC_DECIDE,p = PETSC_DECIDE;
 13:   PetscErrorCode  ierr;
 14:   PetscInt        *lx = NULL,*ly = NULL,*lz = NULL;
 15:   DM              da;
 16:   PetscBool       flg = PETSC_FALSE,test_order = PETSC_FALSE;
 17:   ISColoring      coloring;
 18:   Mat             mat;
 19:   DMDAStencilType stencil_type = DMDA_STENCIL_BOX;
 20:   Vec             lvec,dvec;
 21:   MatFDColoring   fdcoloring;

 23:   PetscInitialize(&argc,&argv,(char*)0,help);

 25:   /* Read options */
 26:   PetscOptionsGetInt(NULL,NULL,"-M",&M,NULL);
 27:   PetscOptionsGetInt(NULL,NULL,"-N",&N,NULL);
 28:   PetscOptionsGetInt(NULL,NULL,"-P",&P,NULL);
 29:   PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL);
 30:   PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);
 31:   PetscOptionsGetInt(NULL,NULL,"-p",&p,NULL);
 32:   PetscOptionsGetInt(NULL,NULL,"-s",&s,NULL);
 33:   PetscOptionsGetInt(NULL,NULL,"-w",&w,NULL);
 34:   PetscOptionsGetBool(NULL,NULL,"-star",&flg,NULL);
 35:   if (flg) stencil_type =  DMDA_STENCIL_STAR;
 36:   PetscOptionsGetBool(NULL,NULL,"-test_order",&test_order,NULL);
 37:   flg  = PETSC_FALSE;
 38:   PetscOptionsGetBool(NULL,NULL,"-distribute",&flg,NULL);
 39:   if (flg) {
 40:     if (m == PETSC_DECIDE) SETERRQ(PETSC_COMM_WORLD,1,"Must set -m option with -distribute option");
 41:     PetscMalloc1(m,&lx);
 42:     for (i=0; i<m-1; i++) lx[i] = 4;
 43:     lx[m-1] = M - 4*(m-1);

 45:     if (n == PETSC_DECIDE) SETERRQ(PETSC_COMM_WORLD,1,"Must set -n option with -distribute option");
 46:     PetscMalloc1(n,&ly);
 47:     for (i=0; i<n-1; i++) ly[i] = 2;
 48:     ly[n-1] = N - 2*(n-1);

 50:     if (p == PETSC_DECIDE) SETERRQ(PETSC_COMM_WORLD,1,"Must set -p option with -distribute option");
 51:     PetscMalloc1(p,&lz);
 52:     for (i=0; i<p-1; i++) lz[i] = 2;
 53:     lz[p-1] = P - 2*(p-1);
 54:   }

 56:   /* Create distributed array and get vectors */
 57:   DMDACreate3d(PETSC_COMM_WORLD,DM_BOUNDARY_NONE,DM_BOUNDARY_NONE,DM_BOUNDARY_NONE,stencil_type,M,N,P,m,n,p,w,s,lx,ly,lz,&da);
 58:   PetscFree(lx);
 59:   PetscFree(ly);
 60:   PetscFree(lz);

 62:   DMSetMatType(da,MATMPIAIJ);
 63:   DMCreateColoring(da,IS_COLORING_GLOBAL,&coloring);
 64:   DMSetMatType(da,MATMPIAIJ);
 65:   DMCreateMatrix(da,&mat);
 66:   MatFDColoringCreate(mat,coloring,&fdcoloring);
 67:   MatFDColoringSetUp(mat,coloring,fdcoloring);

 69:   DMCreateGlobalVector(da,&dvec);
 70:   DMCreateLocalVector(da,&lvec);

 72:   /* Free memory */
 73:   MatFDColoringDestroy(&fdcoloring);
 74:   VecDestroy(&dvec);
 75:   VecDestroy(&lvec);
 76:   MatDestroy(&mat);
 77:   ISColoringDestroy(&coloring);
 78:   DMDestroy(&da);
 79:   PetscFinalize();
 80:   return 0;
 81: }