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 PetscErrorCode ierr; 16c4762a1bSJed Brown DM da; 17c4762a1bSJed Brown Vec local,global,natural; 18c4762a1bSJed Brown PetscScalar value; 19c4762a1bSJed Brown PetscViewer bviewer; 20c4762a1bSJed Brown 21c4762a1bSJed Brown ierr = PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr; 22*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-M",&M,NULL)); 23*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-N",&N,NULL)); 24*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL)); 25*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL)); 26*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-dof",&dof,NULL)); 27c4762a1bSJed Brown 28c4762a1bSJed Brown /* Create distributed array and get vectors */ 29*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMDACreate2d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE,DMDA_STENCIL_BOX,M,N,m,n,dof,1,NULL,NULL,&da)); 30*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMSetFromOptions(da)); 31*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMSetUp(da)); 32*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMCreateGlobalVector(da,&global)); 33*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMCreateLocalVector(da,&local)); 34c4762a1bSJed Brown 35c4762a1bSJed Brown value = -3.0; 36*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecSet(global,value)); 37*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMGlobalToLocalBegin(da,global,INSERT_VALUES,local)); 38*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMGlobalToLocalEnd(da,global,INSERT_VALUES,local)); 39c4762a1bSJed Brown 40*5f80ce2aSJacob Faibussowitsch CHKERRMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank)); 41c4762a1bSJed Brown value = rank+1; 42*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecScale(local,value)); 43*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMLocalToGlobalBegin(da,local,ADD_VALUES,global)); 44*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMLocalToGlobalEnd(da,local,ADD_VALUES,global)); 45c4762a1bSJed Brown 46*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMDACreateNaturalVector(da,&natural)); 47*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMDAGlobalToNaturalBegin(da,global,INSERT_VALUES,natural)); 48*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMDAGlobalToNaturalEnd(da,global,INSERT_VALUES,natural)); 49c4762a1bSJed Brown 50*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMDASetFieldName(da,0,"First field")); 51*5f80ce2aSJacob Faibussowitsch /* CHKERRQ(VecView(global,PETSC_VIEWER_DRAW_WORLD)); */ 52c4762a1bSJed Brown 53*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerBinaryOpen(PETSC_COMM_WORLD,"daoutput",FILE_MODE_WRITE,&bviewer)); 54*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMView(da,bviewer)); 55*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecView(global,bviewer)); 56*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerDestroy(&bviewer)); 57c4762a1bSJed Brown 58c4762a1bSJed Brown /* Free memory */ 59*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecDestroy(&local)); 60*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecDestroy(&global)); 61*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecDestroy(&natural)); 62*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMDestroy(&da)); 63c4762a1bSJed Brown ierr = PetscFinalize(); 64c4762a1bSJed Brown return ierr; 65c4762a1bSJed Brown } 66