1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests saving DMDA vectors to files.\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown /* 5c4762a1bSJed Brown ex13.c reads in the DMDA and vector written by this program. 6c4762a1bSJed Brown */ 7c4762a1bSJed Brown 8c4762a1bSJed Brown #include <petscdm.h> 9c4762a1bSJed Brown #include <petscdmda.h> 10c4762a1bSJed Brown 11c4762a1bSJed Brown int main(int argc,char **argv) 12c4762a1bSJed Brown { 13c4762a1bSJed Brown PetscMPIInt rank; 14c4762a1bSJed Brown PetscInt M = 10,N = 8,m = PETSC_DECIDE,n = PETSC_DECIDE, dof = 1; 15c4762a1bSJed Brown DM da; 16c4762a1bSJed Brown Vec local,global,natural; 17c4762a1bSJed Brown PetscScalar value; 18c4762a1bSJed Brown PetscViewer bviewer; 19c4762a1bSJed Brown 20*b122ec5aSJacob Faibussowitsch CHKERRQ(PetscInitialize(&argc,&argv,(char*)0,help)); 215f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-M",&M,NULL)); 225f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-N",&N,NULL)); 235f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL)); 245f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL)); 255f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-dof",&dof,NULL)); 26c4762a1bSJed Brown 27c4762a1bSJed Brown /* Create distributed array and get vectors */ 285f80ce2aSJacob Faibussowitsch CHKERRQ(DMDACreate2d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE,DMDA_STENCIL_BOX,M,N,m,n,dof,1,NULL,NULL,&da)); 295f80ce2aSJacob Faibussowitsch CHKERRQ(DMSetFromOptions(da)); 305f80ce2aSJacob Faibussowitsch CHKERRQ(DMSetUp(da)); 315f80ce2aSJacob Faibussowitsch CHKERRQ(DMCreateGlobalVector(da,&global)); 325f80ce2aSJacob Faibussowitsch CHKERRQ(DMCreateLocalVector(da,&local)); 33c4762a1bSJed Brown 34c4762a1bSJed Brown value = -3.0; 355f80ce2aSJacob Faibussowitsch CHKERRQ(VecSet(global,value)); 365f80ce2aSJacob Faibussowitsch CHKERRQ(DMGlobalToLocalBegin(da,global,INSERT_VALUES,local)); 375f80ce2aSJacob Faibussowitsch CHKERRQ(DMGlobalToLocalEnd(da,global,INSERT_VALUES,local)); 38c4762a1bSJed Brown 395f80ce2aSJacob Faibussowitsch CHKERRMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank)); 40c4762a1bSJed Brown value = rank+1; 415f80ce2aSJacob Faibussowitsch CHKERRQ(VecScale(local,value)); 425f80ce2aSJacob Faibussowitsch CHKERRQ(DMLocalToGlobalBegin(da,local,ADD_VALUES,global)); 435f80ce2aSJacob Faibussowitsch CHKERRQ(DMLocalToGlobalEnd(da,local,ADD_VALUES,global)); 44c4762a1bSJed Brown 455f80ce2aSJacob Faibussowitsch CHKERRQ(DMDACreateNaturalVector(da,&natural)); 465f80ce2aSJacob Faibussowitsch CHKERRQ(DMDAGlobalToNaturalBegin(da,global,INSERT_VALUES,natural)); 475f80ce2aSJacob Faibussowitsch CHKERRQ(DMDAGlobalToNaturalEnd(da,global,INSERT_VALUES,natural)); 48c4762a1bSJed Brown 495f80ce2aSJacob Faibussowitsch CHKERRQ(DMDASetFieldName(da,0,"First field")); 505f80ce2aSJacob Faibussowitsch /* CHKERRQ(VecView(global,PETSC_VIEWER_DRAW_WORLD)); */ 51c4762a1bSJed Brown 525f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerBinaryOpen(PETSC_COMM_WORLD,"daoutput",FILE_MODE_WRITE,&bviewer)); 535f80ce2aSJacob Faibussowitsch CHKERRQ(DMView(da,bviewer)); 545f80ce2aSJacob Faibussowitsch CHKERRQ(VecView(global,bviewer)); 555f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerDestroy(&bviewer)); 56c4762a1bSJed Brown 57c4762a1bSJed Brown /* Free memory */ 585f80ce2aSJacob Faibussowitsch CHKERRQ(VecDestroy(&local)); 595f80ce2aSJacob Faibussowitsch CHKERRQ(VecDestroy(&global)); 605f80ce2aSJacob Faibussowitsch CHKERRQ(VecDestroy(&natural)); 615f80ce2aSJacob Faibussowitsch CHKERRQ(DMDestroy(&da)); 62*b122ec5aSJacob Faibussowitsch CHKERRQ(PetscFinalize()); 63*b122ec5aSJacob Faibussowitsch return 0; 64c4762a1bSJed Brown } 65