1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests DMDAGetElements() and VecView() contour plotting for 2d DMDAs.\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscdm.h> 5c4762a1bSJed Brown #include <petscdmda.h> 6c4762a1bSJed Brown #include <petscdraw.h> 7c4762a1bSJed Brown 8c4762a1bSJed Brown int main(int argc,char **argv) 9c4762a1bSJed Brown { 10c4762a1bSJed Brown PetscInt M = 10,N = 8,ne,nc,i; 11c4762a1bSJed Brown const PetscInt *e; 12c4762a1bSJed Brown PetscErrorCode ierr; 13c4762a1bSJed Brown PetscBool flg = PETSC_FALSE; 14c4762a1bSJed Brown DM da; 15c4762a1bSJed Brown PetscViewer viewer; 16c4762a1bSJed Brown Vec local,global; 17c4762a1bSJed Brown PetscScalar value; 18c4762a1bSJed Brown DMBoundaryType bx = DM_BOUNDARY_NONE,by = DM_BOUNDARY_NONE; 19c4762a1bSJed Brown DMDAStencilType stype = DMDA_STENCIL_BOX; 20c4762a1bSJed Brown PetscScalar *lv; 21c4762a1bSJed Brown 22c4762a1bSJed Brown ierr = PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr; 23*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerDrawOpen(PETSC_COMM_WORLD,0,"",300,0,300,300,&viewer)); 24c4762a1bSJed Brown 25c4762a1bSJed Brown /* Read options */ 26*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-M",&M,NULL)); 27*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-N",&N,NULL)); 28*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetBool(NULL,NULL,"-star_stencil",&flg,NULL)); 29c4762a1bSJed Brown if (flg) stype = DMDA_STENCIL_STAR; 30c4762a1bSJed Brown 31c4762a1bSJed Brown /* Create distributed array and get vectors */ 32*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMDACreate2d(PETSC_COMM_WORLD,bx,by,stype,M,N,PETSC_DECIDE,PETSC_DECIDE,1,1,NULL,NULL,&da)); 33*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMSetFromOptions(da)); 34*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMSetUp(da)); 35*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMCreateGlobalVector(da,&global)); 36*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMCreateLocalVector(da,&local)); 37c4762a1bSJed Brown 38c4762a1bSJed Brown value = -3.0; 39*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecSet(global,value)); 40*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMGlobalToLocalBegin(da,global,INSERT_VALUES,local)); 41*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMGlobalToLocalEnd(da,global,INSERT_VALUES,local)); 42c4762a1bSJed Brown 43*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMDASetElementType(da,DMDA_ELEMENT_P1)); 44*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMDAGetElements(da,&ne,&nc,&e)); 45*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecGetArray(local,&lv)); 46c4762a1bSJed Brown for (i=0; i<ne; i++) { 47*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscSynchronizedPrintf(PETSC_COMM_WORLD,"i %D e[3*i] %D %D %D\n",i,e[3*i],e[3*i+1],e[3*i+2])); 48c4762a1bSJed Brown lv[e[3*i]] = i; 49c4762a1bSJed Brown } 50*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscSynchronizedFlush(PETSC_COMM_WORLD,stdout)); 51*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecRestoreArray(local,&lv)); 52*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMDARestoreElements(da,&ne,&nc,&e)); 53c4762a1bSJed Brown 54*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMLocalToGlobalBegin(da,local,ADD_VALUES,global)); 55*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMLocalToGlobalEnd(da,local,ADD_VALUES,global)); 56c4762a1bSJed Brown 57*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMView(da,viewer)); 58*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecView(global,viewer)); 59c4762a1bSJed Brown 60c4762a1bSJed Brown /* Free memory */ 61*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerDestroy(&viewer)); 62*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecDestroy(&local)); 63*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecDestroy(&global)); 64*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMDestroy(&da)); 65c4762a1bSJed Brown ierr = PetscFinalize(); 66c4762a1bSJed Brown return ierr; 67c4762a1bSJed Brown } 68c4762a1bSJed Brown 69c4762a1bSJed Brown /*TEST 70c4762a1bSJed Brown 71c4762a1bSJed Brown test: 72c4762a1bSJed Brown requires: x 73c4762a1bSJed Brown 74c4762a1bSJed Brown test: 75c4762a1bSJed Brown suffix: 2 76c4762a1bSJed Brown nsize: 2 77c4762a1bSJed Brown requires: x 78c4762a1bSJed Brown 79c4762a1bSJed Brown TEST*/ 80