/*
Sets up a monitor that will display He as a function of space and cluster size for each time step
*/
PetscErrorCode MyMonitorSetUp(TS ts)
{
DM da;
PetscErrorCode ierr;
PetscInt xi,xs,xm,*idx,M,xj,cnt = 0,dof = 3*N + N*N;
const PetscInt *lx;
Vec C;
MyMonitorCtx *ctx;
PetscBool flg;
IS is;
char ycoor[32];
PetscReal valuebounds[4] = {0, 1.2, 0, 1.2};
PetscFunctionBeginUser;
ierr = PetscOptionsHasName(PETSC_NULL,"-mymonitor",&flg);CHKERRQ(ierr);
if (!flg) PetscFunctionReturn(0);
ierr = TSGetDM(ts,&da);CHKERRQ(ierr);
ierr = PetscNew(MyMonitorCtx,&ctx);CHKERRQ(ierr);
ierr = PetscViewerDrawOpen(((PetscObject)da)->comm,PETSC_NULL,"",PETSC_DECIDE,PETSC_DECIDE,600,400,&ctx->viewer);CHKERRQ(ierr);
ierr = DMDAGetCorners(da,&xs,PETSC_NULL,PETSC_NULL,&xm,PETSC_NULL,PETSC_NULL);CHKERRQ(ierr);
ierr = DMDAGetInfo(da,PETSC_IGNORE,&M,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE);CHKERRQ(ierr);
ierr = DMDAGetOwnershipRanges(da,&lx,PETSC_NULL,PETSC_NULL);CHKERRQ(ierr);
ierr = DMDACreate2d(((PetscObject)da)->comm,DMDA_BOUNDARY_NONE,DMDA_BOUNDARY_NONE,DMDA_STENCIL_STAR,M,N,PETSC_DETERMINE,1,2,1,lx,PETSC_NULL,&ctx->da);CHKERRQ(ierr);
ierr = DMDASetFieldName(ctx->da,0,"He");CHKERRQ(ierr);
ierr = DMDASetFieldName(ctx->da,1,"V");CHKERRQ(ierr);
ierr = DMDASetCoordinateName(ctx->da,0,"X coordinate direction");CHKERRQ(ierr);
ierr = PetscSNPrintf(ycoor,32,"%D ... Cluster size ... 1",N);CHKERRQ(ierr);
ierr = DMDASetCoordinateName(ctx->da,1,ycoor);CHKERRQ(ierr);
ierr = DMCreateGlobalVector(ctx->da,&ctx->He);CHKERRQ(ierr);
ierr = PetscMalloc(2*N*xm*sizeof(PetscInt),&idx);CHKERRQ(ierr);
cnt = 0;
for (xj=0; xj<N; xj++) {
for (xi=xs; xi<xs+xm; xi++) {
idx[cnt++] = dof*xi + xj;
idx[cnt++] = dof*xi + xj + N;
}
}
ierr = ISCreateGeneral(((PetscObject)ts)->comm,2*N*xm,idx,PETSC_OWN_POINTER,&is);CHKERRQ(ierr);
ierr = TSGetSolution(ts,&C);CHKERRQ(ierr);
ierr = VecScatterCreate(C,is,ctx->He,PETSC_NULL,&ctx->scatter);CHKERRQ(ierr);
ierr = ISDestroy(&is);CHKERRQ(ierr);
/* sets the bounds on the contour plot values so the colors mean the same thing for different timesteps */
ierr = PetscViewerDrawSetBounds(ctx->viewer,2,valuebounds);CHKERRQ(ierr);
ierr = TSMonitorSet(ts,MyMonitorMonitor,ctx,MyMonitorDestroy);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
int main(int argc, char **argv)
{
PetscErrorCode ierr;
Vec x; /* Solution vector */
TS ts; /* Time-stepping context */
AppCtx user; /* Application context */
PetscViewer viewer;
PetscInitialize(&argc,&argv,"petscopt_ex7", help);
/* Get physics and time parameters */
ierr = Parameter_settings(&user);CHKERRQ(ierr);
/* Create a 2D DA with dof = 1 */
ierr = DMDACreate2d(PETSC_COMM_WORLD,user.bx,user.by,DMDA_STENCIL_STAR,-4,-4,PETSC_DECIDE,PETSC_DECIDE,1,user.st_width,NULL,NULL,&user.da);CHKERRQ(ierr);
/* Set x and y coordinates */
ierr = DMDASetUniformCoordinates(user.da,user.xmin,user.xmax,user.ymin,user.ymax,0,0);CHKERRQ(ierr);
ierr = DMDASetCoordinateName(user.da,0,"X - the angle");
ierr = DMDASetCoordinateName(user.da,1,"Y - the speed");
/* Get global vector x from DM */
ierr = DMCreateGlobalVector(user.da,&x);CHKERRQ(ierr);
ierr = ini_bou(x,&user);CHKERRQ(ierr);
ierr = PetscViewerBinaryOpen(PETSC_COMM_WORLD,"ini_x",FILE_MODE_WRITE,&viewer);CHKERRQ(ierr);
ierr = VecView(x,viewer);CHKERRQ(ierr);
ierr = PetscViewerDestroy(&viewer);CHKERRQ(ierr);
ierr = TSCreate(PETSC_COMM_WORLD,&ts);CHKERRQ(ierr);
ierr = TSSetDM(ts,user.da);CHKERRQ(ierr);
ierr = TSSetProblemType(ts,TS_NONLINEAR);CHKERRQ(ierr);
ierr = TSSetType(ts,TSARKIMEX);CHKERRQ(ierr);
ierr = TSSetIFunction(ts,NULL,IFunction,&user);CHKERRQ(ierr);
/* ierr = TSSetIJacobian(ts,NULL,NULL,IJacobian,&user);CHKERRQ(ierr); */
ierr = TSSetApplicationContext(ts,&user);CHKERRQ(ierr);
ierr = TSSetInitialTimeStep(ts,0.0,.005);CHKERRQ(ierr);
ierr = TSSetFromOptions(ts);CHKERRQ(ierr);
ierr = TSSetPostStep(ts,PostStep);CHKERRQ(ierr);
ierr = TSSolve(ts,x);CHKERRQ(ierr);
ierr = PetscViewerBinaryOpen(PETSC_COMM_WORLD,"fin_x",FILE_MODE_WRITE,&viewer);CHKERRQ(ierr);
ierr = VecView(x,viewer);CHKERRQ(ierr);
ierr = PetscViewerDestroy(&viewer);CHKERRQ(ierr);
ierr = VecDestroy(&x);CHKERRQ(ierr);
ierr = DMDestroy(&user.da);CHKERRQ(ierr);
ierr = TSDestroy(&ts);CHKERRQ(ierr);
PetscFinalize();
return 0;
}
