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C++ DMGlobalToLocalBegin函数代码示例

本文整理汇总了C++中DMGlobalToLocalBegin函数的典型用法代码示例。如果您正苦于以下问题：C++ DMGlobalToLocalBegin函数的具体用法？C++ DMGlobalToLocalBegin怎么用？C++ DMGlobalToLocalBegin使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。


在下文中一共展示了DMGlobalToLocalBegin函数的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: FormFunction_All

static PetscErrorCode FormFunction_All(SNES snes,Vec X,Vec F,void *ctx)
{
  User           user = (User)ctx;
  DM             dau,dak;
  DMDALocalInfo  infou,infok;
  PetscScalar    *u,*k;
  PetscScalar    *fu,*fk;
  PetscErrorCode ierr;
  Vec            Uloc,Kloc,Fu,Fk;

  PetscFunctionBeginUser;
  ierr = DMCompositeGetEntries(user->pack,&dau,&dak);CHKERRQ(ierr);
  ierr = DMDAGetLocalInfo(dau,&infou);CHKERRQ(ierr);
  ierr = DMDAGetLocalInfo(dak,&infok);CHKERRQ(ierr);
  ierr = DMCompositeGetLocalVectors(user->pack,&Uloc,&Kloc);CHKERRQ(ierr);
  switch (user->ptype) {
  case 0:
    ierr = DMGlobalToLocalBegin(dau,X,INSERT_VALUES,Uloc);CHKERRQ(ierr);
    ierr = DMGlobalToLocalEnd  (dau,X,INSERT_VALUES,Uloc);CHKERRQ(ierr);
    ierr = DMDAVecGetArray(dau,Uloc,&u);CHKERRQ(ierr);
    ierr = DMDAVecGetArray(dak,user->Kloc,&k);CHKERRQ(ierr);
    ierr = DMDAVecGetArray(dau,F,&fu);CHKERRQ(ierr);
    ierr = FormFunctionLocal_U(user,&infou,u,k,fu);CHKERRQ(ierr);
    ierr = DMDAVecRestoreArray(dau,F,&fu);CHKERRQ(ierr);
    ierr = DMDAVecRestoreArray(dau,Uloc,&u);CHKERRQ(ierr);
    ierr = DMDAVecRestoreArray(dak,user->Kloc,&k);CHKERRQ(ierr);
    break;
  case 1:
    ierr = DMGlobalToLocalBegin(dak,X,INSERT_VALUES,Kloc);CHKERRQ(ierr);
    ierr = DMGlobalToLocalEnd  (dak,X,INSERT_VALUES,Kloc);CHKERRQ(ierr);
    ierr = DMDAVecGetArray(dau,user->Uloc,&u);CHKERRQ(ierr);
    ierr = DMDAVecGetArray(dak,Kloc,&k);CHKERRQ(ierr);
    ierr = DMDAVecGetArray(dak,F,&fk);CHKERRQ(ierr);
    ierr = FormFunctionLocal_K(user,&infok,u,k,fk);CHKERRQ(ierr);
    ierr = DMDAVecRestoreArray(dak,F,&fk);CHKERRQ(ierr);
    ierr = DMDAVecRestoreArray(dau,user->Uloc,&u);CHKERRQ(ierr);
    ierr = DMDAVecRestoreArray(dak,Kloc,&k);CHKERRQ(ierr);
    break;
  case 2:
    ierr = DMCompositeScatter(user->pack,X,Uloc,Kloc);CHKERRQ(ierr);
    ierr = DMDAVecGetArray(dau,Uloc,&u);CHKERRQ(ierr);
    ierr = DMDAVecGetArray(dak,Kloc,&k);CHKERRQ(ierr);
    ierr = DMCompositeGetAccess(user->pack,F,&Fu,&Fk);CHKERRQ(ierr);
    ierr = DMDAVecGetArray(dau,Fu,&fu);CHKERRQ(ierr);
    ierr = DMDAVecGetArray(dak,Fk,&fk);CHKERRQ(ierr);
    ierr = FormFunctionLocal_U(user,&infou,u,k,fu);CHKERRQ(ierr);
    ierr = FormFunctionLocal_K(user,&infok,u,k,fk);CHKERRQ(ierr);
    ierr = DMDAVecRestoreArray(dau,Fu,&fu);CHKERRQ(ierr);
    ierr = DMDAVecRestoreArray(dak,Fk,&fk);CHKERRQ(ierr);
    ierr = DMCompositeRestoreAccess(user->pack,F,&Fu,&Fk);CHKERRQ(ierr);
    ierr = DMDAVecRestoreArray(dau,Uloc,&u);CHKERRQ(ierr);
    ierr = DMDAVecRestoreArray(dak,Kloc,&k);CHKERRQ(ierr);
    break;
  }
  ierr = DMCompositeRestoreLocalVectors(user->pack,&Uloc,&Kloc);CHKERRQ(ierr);
  PetscFunctionReturn(0);
}
开发者ID:pombredanne，项目名称:petsc，代码行数:57，代码来源:ex28.c

示例2: IFunction

PetscErrorCode IFunction(TS ts,PetscReal t,Vec X,Vec Xdot,Vec F,void *ctx)
{
  PetscErrorCode ierr;
  AppCtx         *user=(AppCtx*)ctx;
  DM             cda;
  DMDACoor2d     **coors;
  PetscScalar    **p,**f,**pdot;
  PetscInt       i,j;
  PetscInt       xs,ys,xm,ym,M,N;
  Vec            localX,gc,localXdot;
  PetscScalar    p_adv1,p_adv2,p_diff;

  PetscFunctionBeginUser;
  ierr = DMDAGetInfo(user->da,NULL,&M,&N,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL);
  ierr = DMGetCoordinateDM(user->da,&cda);CHKERRQ(ierr);
  ierr = DMDAGetCorners(cda,&xs,&ys,0,&xm,&ym,0);CHKERRQ(ierr);

  ierr = DMGetLocalVector(user->da,&localX);CHKERRQ(ierr);
  ierr = DMGetLocalVector(user->da,&localXdot);CHKERRQ(ierr);

  ierr = DMGlobalToLocalBegin(user->da,X,INSERT_VALUES,localX);CHKERRQ(ierr);
  ierr = DMGlobalToLocalEnd(user->da,X,INSERT_VALUES,localX);CHKERRQ(ierr);
  ierr = DMGlobalToLocalBegin(user->da,Xdot,INSERT_VALUES,localXdot);CHKERRQ(ierr);
  ierr = DMGlobalToLocalEnd(user->da,Xdot,INSERT_VALUES,localXdot);CHKERRQ(ierr);

  ierr = DMGetCoordinatesLocal(user->da,&gc);CHKERRQ(ierr);

  ierr = DMDAVecGetArrayRead(cda,gc,&coors);CHKERRQ(ierr);
  ierr = DMDAVecGetArrayRead(user->da,localX,&p);CHKERRQ(ierr);
  ierr = DMDAVecGetArrayRead(user->da,localXdot,&pdot);CHKERRQ(ierr);
  ierr = DMDAVecGetArray(user->da,F,&f);CHKERRQ(ierr);

  PetscScalar diffuse1,gamma;
  gamma = user->D*user->ws/(2*user->H);
  diffuse1 = user->lambda*user->lambda*user->q/(user->lambda*gamma+1)*(1.0 - PetscExpScalar(-t*(gamma+1.0)/user->lambda));
  user->disper_coe = user->ws*user->ws/(4*user->H*user->H)*diffuse1;

  for (i=xs; i < xs+xm; i++) {
    for (j=ys; j < ys+ym; j++) {
      ierr = adv1(p,coors[j][i].y,i,j,M,&p_adv1,user);CHKERRQ(ierr);
      ierr = adv2(p,coors[j][i].x,coors[j][i].y,i,j,N,&p_adv2,user);CHKERRQ(ierr);
      ierr = diffuse(p,i,j,t,&p_diff,user);CHKERRQ(ierr);
      f[j][i] = -p_adv1 - p_adv2  + p_diff - pdot[j][i];
    }
  }
  ierr = DMDAVecRestoreArrayRead(user->da,localX,&p);CHKERRQ(ierr);
  ierr = DMDAVecRestoreArrayRead(user->da,localX,&pdot);CHKERRQ(ierr);
  ierr = DMRestoreLocalVector(user->da,&localX);CHKERRQ(ierr);
  ierr = DMRestoreLocalVector(user->da,&localXdot);CHKERRQ(ierr);
  ierr = DMDAVecRestoreArray(user->da,F,&f);CHKERRQ(ierr);
  ierr = DMDAVecRestoreArrayRead(cda,gc,&coors);CHKERRQ(ierr);

  PetscFunctionReturn(0);
}
开发者ID:fengyuqi，项目名称:petsc，代码行数:54，代码来源:ex8.c

示例3: FormResidual

PetscErrorCode FormResidual(TS ts,PetscReal t,Vec U,Vec Udot,Vec R,void *user)
{
  PetscFunctionBegin;

  PetscErrorCode ierr;

  DMDALocalInfo    info;
  DM               dm;
  Vec              localU,localUdot,localR; // local versions
  Field          **h,**hdot,**r;

  /* get the da from the snes */
  ierr = TSGetDM(ts, &dm);CHKERRQ(ierr);

  /* handle the vec U */
  ierr = DMGetLocalVector(dm,&localU);CHKERRQ(ierr);
  ierr = DMGlobalToLocalBegin(dm,U,INSERT_VALUES,localU);CHKERRQ(ierr);
  ierr = DMGlobalToLocalEnd(dm,U,INSERT_VALUES,localU);CHKERRQ(ierr);

  /* handle the vec Udot */
  ierr = DMGetLocalVector(dm,&localUdot);CHKERRQ(ierr);
  ierr = DMGlobalToLocalBegin(dm,Udot,INSERT_VALUES,localUdot);CHKERRQ(ierr);
  ierr = DMGlobalToLocalEnd(dm,Udot,INSERT_VALUES,localUdot);CHKERRQ(ierr);

  /* handle the vec R */
  ierr = DMGetLocalVector(dm,&localR);CHKERRQ(ierr);
  ierr = VecZeroEntries(localR);CHKERRQ(ierr);

  /* Get the arrays from the vectors */
  ierr = DMIGAVecGetArray(dm,localU,&h);CHKERRQ(ierr);
  ierr = DMIGAVecGetArray(dm,localUdot,&hdot);CHKERRQ(ierr);
  ierr = DMIGAVecGetArray(dm,localR,&r);CHKERRQ(ierr);

  /* Grab the local info and call the local residual routine */
  ierr = DMIGAGetLocalInfo(dm,&info);CHKERRQ(ierr);CHKERRQ(ierr);
  ierr = FormResidualLocal(&info,t,h,hdot,r,(AppCtx *) user);CHKERRQ(ierr);

  /* Restore the arrays */
  ierr = DMIGAVecRestoreArray(dm,localR,&r);CHKERRQ(ierr);
  ierr = DMIGAVecRestoreArray(dm,localUdot,&hdot);CHKERRQ(ierr);
  ierr = DMIGAVecRestoreArray(dm,localU,&h);CHKERRQ(ierr);

  /* Add contributions back to global R */
  ierr = VecZeroEntries(R);CHKERRQ(ierr);
  ierr = DMLocalToGlobalBegin(dm,localR,ADD_VALUES,R);CHKERRQ(ierr); // this one adds the values
  ierr = DMLocalToGlobalEnd(dm,localR,ADD_VALUES,R);CHKERRQ(ierr);

  /* Restore the local vectors */
  ierr = DMRestoreLocalVector(dm,&localU);CHKERRQ(ierr);
  ierr = DMRestoreLocalVector(dm,&localUdot);CHKERRQ(ierr);
  ierr = DMRestoreLocalVector(dm,&localR);CHKERRQ(ierr);

  PetscFunctionReturn(0);
}
开发者ID:Kun-Qu，项目名称:petsc，代码行数:54，代码来源:ex18.c

示例4: FormTangent

PetscErrorCode FormTangent(TS ts,PetscReal t,Vec U,Vec Udot,PetscReal shift,Mat *A,Mat *B,MatStructure *flag,void *ctx)
{
  PetscFunctionBegin;
  PetscErrorCode ierr;

  SETERRQ(PETSC_COMM_WORLD, PETSC_ERR_ARG_OUTOFRANGE, "FormTangent not implemented, use -snes_mf");

  DMDALocalInfo    info;
  DM               da_dof;
  Vec              localU,localUdot; // local versions
  Field          **h,**hdot;

  /* get the da from the snes */
  ierr = TSGetDM(ts,(DM*)&da_dof);CHKERRQ(ierr);

  /* handle the vec U */
  ierr = DMGetLocalVector(da_dof,&localU);CHKERRQ(ierr);
  ierr = DMGlobalToLocalBegin(da_dof,U,INSERT_VALUES,localU);CHKERRQ(ierr);
  ierr = DMGlobalToLocalEnd(da_dof,U,INSERT_VALUES,localU);CHKERRQ(ierr);

  /* handle the vec Udot */
  ierr = DMGetLocalVector(da_dof,&localUdot);CHKERRQ(ierr);
  ierr = DMGlobalToLocalBegin(da_dof,Udot,INSERT_VALUES,localUdot);CHKERRQ(ierr);
  ierr = DMGlobalToLocalEnd(da_dof,Udot,INSERT_VALUES,localUdot);CHKERRQ(ierr);

  /* Get the arrays from the vectors */
  ierr = DMDAVecGetArray(da_dof,localU,&h);CHKERRQ(ierr);
  ierr = DMDAVecGetArray(da_dof,localUdot,&hdot);CHKERRQ(ierr);

  /* Grab the local info and call the local tangent routine */
  ierr = DMDAGetLocalInfo(da_dof,&info);CHKERRQ(ierr);CHKERRQ(ierr);
  ierr = MatZeroEntries(*B);CHKERRQ(ierr); // pre-zero the matrix
  ierr = FormTangentLocal(&info,t,h,hdot,shift,B,(AppCtx *) ctx);CHKERRQ(ierr);
  ierr = MatAssemblyBegin(*B,MAT_FINAL_ASSEMBLY); CHKERRQ(ierr);
  ierr = MatAssemblyEnd(*B,MAT_FINAL_ASSEMBLY); CHKERRQ(ierr);
  if (*A != *B) { // then we could be matrix free
    ierr = MatAssemblyBegin(*A,MAT_FINAL_ASSEMBLY); CHKERRQ(ierr);
    ierr = MatAssemblyEnd(*A,MAT_FINAL_ASSEMBLY); CHKERRQ(ierr);
  }
  *flag = SAME_NONZERO_PATTERN; /* the sparsity pattern does not change */

  ierr = DMDAVecRestoreArray(da_dof,localUdot,&hdot);CHKERRQ(ierr);
  ierr = DMDAVecRestoreArray(da_dof,localU,&h);CHKERRQ(ierr);

  /* Restore the arrays and local vectors */
  ierr = DMRestoreLocalVector(da_dof,&localU);CHKERRQ(ierr);
  ierr = DMRestoreLocalVector(da_dof,&localUdot);CHKERRQ(ierr);

  PetscFunctionReturn(0);
}
开发者ID:Kun-Qu，项目名称:petsc，代码行数:50，代码来源:ex18.c

示例5: DMPlexProjectFunction

/*@C
  DMPlexProjectField - This projects the given function of the fields into the function space provided.

  Input Parameters:
+ dm      - The DM
. U       - The input field vector
. funcs   - The functions to evaluate, one per field
- mode    - The insertion mode for values

  Output Parameter:
. X       - The output vector

  Level: developer

.seealso: DMPlexProjectFunction(), DMPlexComputeL2Diff()
@*/
PetscErrorCode DMPlexProjectField(DM dm, Vec U, void (**funcs)(const PetscScalar[], const PetscScalar[], const PetscScalar[], const PetscScalar[], const PetscScalar[], const PetscScalar[], const PetscReal [], PetscScalar []), InsertMode mode, Vec X)
{
  Vec            localX, localU;
  PetscErrorCode ierr;

  PetscFunctionBegin;
  PetscValidHeaderSpecific(dm, DM_CLASSID, 1);
  ierr = DMGetLocalVector(dm, &localX);CHKERRQ(ierr);
  ierr = DMGetLocalVector(dm, &localU);CHKERRQ(ierr);
  ierr = DMGlobalToLocalBegin(dm, U, INSERT_VALUES, localU);CHKERRQ(ierr);
  ierr = DMGlobalToLocalEnd(dm, U, INSERT_VALUES, localU);CHKERRQ(ierr);
  ierr = DMPlexProjectFieldLocal(dm, localU, funcs, mode, localX);CHKERRQ(ierr);
  ierr = DMLocalToGlobalBegin(dm, localX, mode, X);CHKERRQ(ierr);
  ierr = DMLocalToGlobalEnd(dm, localX, mode, X);CHKERRQ(ierr);
  if (mode == INSERT_VALUES || mode == INSERT_ALL_VALUES || mode == INSERT_BC_VALUES) {
    Mat cMat;

    ierr = DMGetDefaultConstraints(dm, NULL, &cMat);CHKERRQ(ierr);
    if (cMat) {
      ierr = DMGlobalToLocalSolve(dm, localX, X);CHKERRQ(ierr);
    }
  }
  ierr = DMRestoreLocalVector(dm, &localX);CHKERRQ(ierr);
  ierr = DMRestoreLocalVector(dm, &localU);CHKERRQ(ierr);
  PetscFunctionReturn(0);
}
开发者ID:pombredanne，项目名称:petsc，代码行数:42，代码来源:dmproject.c

示例6: FormMassTimeStepFunction

/**
   Form the time step function for the mass term
   @param Vec in:       (y^(n+1))
   out @param Vec out:  My^(n+1) - M y^(n)    if timestep = 1, backward euler
                                              will do the BDF2
**/
PetscErrorCode FormMassTimeStepFunction(User user, Algebra algebra, Vec in, Vec out, PetscBool rebuild)
{
  PetscErrorCode  ierr;
  PetscMPIInt     rank;
  Vec            inLocal;

  PetscFunctionBegin;
  ierr = MPI_Comm_rank(PETSC_COMM_WORLD,&rank);CHKERRQ(ierr);
  ierr = VecSet(out, 0.0);CHKERRQ(ierr);

  ierr = DMGetLocalVector(user->dm, &inLocal);CHKERRQ(ierr);

  ierr = DMGlobalToLocalBegin(user->dm, in, INSERT_VALUES, inLocal);CHKERRQ(ierr);
  ierr = DMGlobalToLocalEnd(user->dm, in, INSERT_VALUES, inLocal);CHKERRQ(ierr);

  ierr = ApplyBC(user->dm, user->current_time, inLocal, user);CHKERRQ(ierr);

  ierr = CaculateLocalMassFunction(user->dm, inLocal, out, user);CHKERRQ(ierr);

  ierr = DMLocalToGlobalBegin(user->dm, inLocal, INSERT_VALUES, in);CHKERRQ(ierr);
  ierr = DMLocalToGlobalEnd(user->dm, inLocal, INSERT_VALUES, in);CHKERRQ(ierr);

  ierr = DMRestoreLocalVector(user->dm, &inLocal);CHKERRQ(ierr);

  PetscFunctionReturn(0);
}
开发者ID:rlchen2008，项目名称:FVM-Rlchen，代码行数:32，代码来源:SetupFunctions.c

示例7: DMDAComputeFunction

/*
  This function should eventually replace:
    DMDAComputeFunction() and DMDAComputeFunction1()
 */
static PetscErrorCode SNESComputeObjective_DMDA(SNES snes,Vec X,PetscReal *ob,void *ctx)
{
  PetscErrorCode ierr;
  DM             dm;
  DMSNES_DA      *dmdasnes = (DMSNES_DA*)ctx;
  DMDALocalInfo  info;
  Vec            Xloc;
  void           *x;

  PetscFunctionBegin;
  PetscValidHeaderSpecific(snes,SNES_CLASSID,1);
  PetscValidHeaderSpecific(X,VEC_CLASSID,2);
  PetscValidPointer(ob,3);
  if (!dmdasnes->objectivelocal) SETERRQ(PetscObjectComm((PetscObject)snes),PETSC_ERR_PLIB,"Corrupt context");
  ierr = SNESGetDM(snes,&dm);CHKERRQ(ierr);
  ierr = DMGetLocalVector(dm,&Xloc);CHKERRQ(ierr);
  ierr = DMGlobalToLocalBegin(dm,X,INSERT_VALUES,Xloc);CHKERRQ(ierr);
  ierr = DMGlobalToLocalEnd(dm,X,INSERT_VALUES,Xloc);CHKERRQ(ierr);
  ierr = DMDAGetLocalInfo(dm,&info);CHKERRQ(ierr);
  ierr = DMDAVecGetArray(dm,Xloc,&x);CHKERRQ(ierr);
  CHKMEMQ;
  ierr = (*dmdasnes->objectivelocal)(&info,x,ob,dmdasnes->objectivelocalctx);CHKERRQ(ierr);
  CHKMEMQ;
  ierr = DMDAVecRestoreArray(dm,Xloc,&x);CHKERRQ(ierr);
  ierr = DMRestoreLocalVector(dm,&Xloc);CHKERRQ(ierr);
  PetscFunctionReturn(0);
}
开发者ID:hsahasra，项目名称:petsc-magma-dense-mat，代码行数:31，代码来源:dmdasnes.c

示例8: SNESComputeFunction_DMLocal

static PetscErrorCode SNESComputeFunction_DMLocal(SNES snes,Vec X,Vec F,void *ctx)
{
  PetscErrorCode ierr;
  DM             dm;
  DMSNES_Local   *dmlocalsnes = (DMSNES_Local*)ctx;
  Vec            Xloc,Floc;

  PetscFunctionBegin;
  PetscValidHeaderSpecific(snes,SNES_CLASSID,1);
  PetscValidHeaderSpecific(X,VEC_CLASSID,2);
  PetscValidHeaderSpecific(F,VEC_CLASSID,3);
  ierr = SNESGetDM(snes,&dm);CHKERRQ(ierr);
  ierr = DMGetLocalVector(dm,&Xloc);CHKERRQ(ierr);
  ierr = DMGetLocalVector(dm,&Floc);CHKERRQ(ierr);
  ierr = VecZeroEntries(Xloc);CHKERRQ(ierr);
  ierr = VecZeroEntries(Floc);CHKERRQ(ierr);
  ierr = DMGlobalToLocalBegin(dm,X,INSERT_VALUES,Xloc);CHKERRQ(ierr);
  ierr = DMGlobalToLocalEnd(dm,X,INSERT_VALUES,Xloc);CHKERRQ(ierr);
  CHKMEMQ;
  ierr = (*dmlocalsnes->residuallocal)(dm,Xloc,Floc,dmlocalsnes->residuallocalctx);CHKERRQ(ierr);
  CHKMEMQ;
  ierr = VecZeroEntries(F);CHKERRQ(ierr);
  ierr = DMLocalToGlobalBegin(dm,Floc,ADD_VALUES,F);CHKERRQ(ierr);
  ierr = DMLocalToGlobalEnd(dm,Floc,ADD_VALUES,F);CHKERRQ(ierr);
  ierr = DMRestoreLocalVector(dm,&Floc);CHKERRQ(ierr);
  ierr = DMRestoreLocalVector(dm,&Xloc);CHKERRQ(ierr);
  PetscFunctionReturn(0);
}
开发者ID:erdc-cm，项目名称:petsc-dev，代码行数:28，代码来源:dmlocalsnes.c

示例9: FormDiffusionFunction

/*
   Applies the second order centered difference diffusion operator on a one dimensional periodic domain
*/
static PetscErrorCode FormDiffusionFunction(TS ts,PetscReal t,Vec X,Vec F,void *ptr)
{
  User              user = (User)ptr;
  PetscErrorCode    ierr;
  PetscScalar       **f;
  const PetscScalar **x;
  DM                dm;
  PetscInt          i,xs,xm,j,dof;
  Vec               Xlocal;
  PetscReal         idx;

  PetscFunctionBeginUser;
  ierr = TSGetDM(ts,&dm);CHKERRQ(ierr);
  ierr = DMDAGetInfo(dm,NULL,NULL,NULL,NULL,NULL,NULL,NULL,&dof,NULL,NULL,NULL,NULL,NULL);CHKERRQ(ierr);
  ierr = DMGetLocalVector(dm,&Xlocal);CHKERRQ(ierr);
  ierr = DMGlobalToLocalBegin(dm,X,INSERT_VALUES,Xlocal);CHKERRQ(ierr);
  ierr = DMGlobalToLocalEnd(dm,X,INSERT_VALUES,Xlocal);CHKERRQ(ierr);
  ierr = DMDAVecGetArrayDOFRead(dm,Xlocal,&x);CHKERRQ(ierr);
  ierr = DMDAVecGetArrayDOF(dm,F,&f);CHKERRQ(ierr);
  ierr = DMDAGetCorners(dm,&xs,NULL,NULL,&xm,NULL,NULL);CHKERRQ(ierr);

  idx = 1.0*user->diffus/user->dx;
  for (i=xs; i<xs+xm; i++) {
    for (j=0; j<dof; j++) {
      f[i][j] += idx*(x[i+1][j] - 2.0*x[i][j] + x[i-1][j]);
    }
  }
  ierr = DMDAVecRestoreArrayDOFRead(dm,Xlocal,&x);CHKERRQ(ierr);
  ierr = DMDAVecRestoreArrayDOF(dm,F,&f);CHKERRQ(ierr);
  ierr = DMRestoreLocalVector(dm,&Xlocal);CHKERRQ(ierr);
  PetscFunctionReturn(0);
}
开发者ID:tom-klotz，项目名称:petsc，代码行数:35，代码来源:extchemfield.c

示例10: FormFunction

PetscErrorCode FormFunction(SNES snes, Vec X, Vec F, void *user)
{
  DMDALocalInfo  info;
  Field          **u,**fu;
  PetscErrorCode ierr;
  Vec            localX;
  DM             da;

  PetscFunctionBegin;
  ierr = SNESGetDM(snes,(DM*)&da);CHKERRQ(ierr);
  ierr = DMGetLocalVector(da,&localX);CHKERRQ(ierr);
  /*
     Scatter ghost points to local vector, using the 2-step process
        DMGlobalToLocalBegin(), DMGlobalToLocalEnd().
  */
  ierr = DMGlobalToLocalBegin(da,X,INSERT_VALUES,localX);CHKERRQ(ierr);
  ierr = DMGlobalToLocalEnd(da,X,INSERT_VALUES,localX);CHKERRQ(ierr);
  ierr = DMDAGetLocalInfo(da,&info);CHKERRQ(ierr);
  ierr = DMDAVecGetArray(da,localX,&u);CHKERRQ(ierr);
  ierr = DMDAVecGetArray(da,F,&fu);CHKERRQ(ierr);
  ierr = FormFunctionLocal(&info,u,fu,user);CHKERRQ(ierr);
  ierr = DMDAVecRestoreArray(da,localX,&u);CHKERRQ(ierr);
  ierr = DMDAVecRestoreArray(da,F,&fu);CHKERRQ(ierr);
  ierr = DMRestoreLocalVector(da,&localX);CHKERRQ(ierr);
  PetscFunctionReturn(0); 
}
开发者ID:Kun-Qu，项目名称:petsc，代码行数:26，代码来源:ex19.c

示例11: SNESComputePicardJacobian_DMDA

static PetscErrorCode SNESComputePicardJacobian_DMDA(SNES snes,Vec X,Mat *A,Mat *B,MatStructure *mstr,void *ctx)
{
  PetscErrorCode ierr;
  DM             dm;
  DMSNES_DA      *dmdasnes = (DMSNES_DA*)ctx;
  DMDALocalInfo  info;
  Vec            Xloc;
  void           *x;

  PetscFunctionBegin;
  if (!dmdasnes->jacobianplocal) SETERRQ(PetscObjectComm((PetscObject)snes),PETSC_ERR_PLIB,"Corrupt context");
  ierr = SNESGetDM(snes,&dm);CHKERRQ(ierr);

  ierr = DMGetLocalVector(dm,&Xloc);CHKERRQ(ierr);
  ierr = DMGlobalToLocalBegin(dm,X,INSERT_VALUES,Xloc);CHKERRQ(ierr);
  ierr = DMGlobalToLocalEnd(dm,X,INSERT_VALUES,Xloc);CHKERRQ(ierr);
  ierr = DMDAGetLocalInfo(dm,&info);CHKERRQ(ierr);
  ierr = DMDAVecGetArray(dm,Xloc,&x);CHKERRQ(ierr);
  CHKMEMQ;
  ierr = (*dmdasnes->jacobianplocal)(&info,x,*A,*B,mstr,dmdasnes->picardlocalctx);CHKERRQ(ierr);
  CHKMEMQ;
  ierr  = DMDAVecRestoreArray(dm,Xloc,&x);CHKERRQ(ierr);
  ierr  = DMRestoreLocalVector(dm,&Xloc);CHKERRQ(ierr);
  *mstr = SAME_NONZERO_PATTERN;
  if (*A != *B) {
    ierr = MatAssemblyBegin(*A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);
    ierr = MatAssemblyEnd(*A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);
  }
  PetscFunctionReturn(0);
}
开发者ID:hsahasra，项目名称:petsc-magma-dense-mat，代码行数:30，代码来源:dmdasnes.c

示例12: CaculateLocalSourceTerm

/*
 Caculate the source term of the equations, which includes all
 terms except convetion term, diffusion term, and timedependent term.
*/
PetscErrorCode CaculateLocalSourceTerm(DM dm, Vec locX, Vec F, User user)
{
  PetscErrorCode    ierr;
  DM                dmGrad = user->dmGrad;
  const PetscScalar *x;
  PetscScalar       *f;
  PetscInt          cStart, cell;
  const PetscScalar *cellgeom;
  const CellGeom    *cg;
  Vec               locGrad, Grad;
  const PetscScalar *grad;
  DM                dmCell;

  PetscFunctionBeginUser;

  ierr = VecGetDM(user->cellgeom,&dmCell);CHKERRQ(ierr);

  ierr = VecGetArrayRead(locX,&x);CHKERRQ(ierr);
  ierr = VecGetArray(F,&f);CHKERRQ(ierr);
  ierr = DMPlexGetHeightStratum(dm, 0, &cStart, NULL);CHKERRQ(ierr);
  ierr = VecGetArrayRead(user->cellgeom,&cellgeom);CHKERRQ(ierr);

  ierr = DMGetGlobalVector(dmGrad,&Grad);CHKERRQ(ierr);

  ierr = DMGetLocalVector(dmGrad,&locGrad);CHKERRQ(ierr);
  ierr = DMGlobalToLocalBegin(dmGrad,Grad,INSERT_VALUES,locGrad);CHKERRQ(ierr);
  ierr = DMGlobalToLocalEnd(dmGrad,Grad,INSERT_VALUES,locGrad);CHKERRQ(ierr);

  ierr = DMRestoreGlobalVector(dmGrad,&Grad);CHKERRQ(ierr);

  ierr = VecGetArrayRead(locGrad,&grad);CHKERRQ(ierr);

  for (cell = cStart; cell < user->cEndInterior; cell++) {
    PetscScalar       *fref;
    const PetscScalar *xref;
    PetscScalar       *cgrad;

    ierr = DMPlexPointLocalRead(dmCell,cell,cellgeom,&cg);CHKERRQ(ierr);
    ierr = DMPlexPointLocalRead(dm,cell,x,&xref);CHKERRQ(ierr); /*For the unkown variables*/
    ierr = DMPlexPointGlobalRef(dm,cell,f,&fref);CHKERRQ(ierr);
    ierr = DMPlexPointLocalRead(dmGrad,cell,grad,&cgrad);CHKERRQ(ierr);
//    if (!fref){ PetscPrintf(PETSC_COMM_WORLD,"%d, %d\n", cell, user->cEndInterior);}
    if (fref){
      fref[0] += SourceRho(user, cgrad, xref, cg->centroid);/*the continuity equation*/
      fref[1] += SourceU(user, cgrad, xref, cg->centroid); /*Momentum U*/
      fref[2] += SourceV(user, cgrad, xref, cg->centroid); /*Momentum V*/
      fref[3] += SourceW(user, cgrad, xref, cg->centroid); /*Momentum W*/
      fref[4] += SourceE(user, cgrad, xref, cg->centroid);/*Energy*/
    }
  }

  ierr = VecRestoreArrayRead(locX,&x);CHKERRQ(ierr);
  ierr = VecRestoreArray(F,&f);CHKERRQ(ierr);
  ierr = VecRestoreArrayRead(user->cellgeom,&cellgeom);CHKERRQ(ierr);

  ierr = VecRestoreArrayRead(locGrad,&grad);CHKERRQ(ierr);
  ierr = DMRestoreLocalVector(dmGrad,&locGrad);CHKERRQ(ierr);

  PetscFunctionReturn(0);
}
开发者ID:rlchen2008，项目名称:FVM-Rlchen，代码行数:64，代码来源:SetupFunctions.c

示例13: SetCoordinates1d

PetscErrorCode SetCoordinates1d(DM da)
{
  PetscErrorCode ierr;
  PetscInt       i,start,m;
  Vec            local,global;
  PetscScalar    *coors,*coorslocal;
  DM             cda;

  PetscFunctionBeginUser;
  ierr = DMDASetUniformCoordinates(da,0.0,1.0,0.0,1.0,0.0,1.0);CHKERRQ(ierr);
  ierr = DMGetCoordinateDM(da,&cda);CHKERRQ(ierr);
  ierr = DMGetCoordinates(da,&global);CHKERRQ(ierr);
  ierr = DMGetCoordinatesLocal(da,&local);CHKERRQ(ierr);
  ierr = DMDAVecGetArray(cda,global,&coors);CHKERRQ(ierr);
  ierr = DMDAVecGetArrayRead(cda,local,&coorslocal);CHKERRQ(ierr);
  ierr = DMDAGetCorners(cda,&start,0,0,&m,0,0);CHKERRQ(ierr);
  for (i=start; i<start+m; i++) {
    if (i % 2) {
      coors[i] = coorslocal[i-1] + .1*(coorslocal[i+1] - coorslocal[i-1]);
    }
  }
  ierr = DMDAVecRestoreArray(cda,global,&coors);CHKERRQ(ierr);
  ierr = DMDAVecRestoreArrayRead(cda,local,&coorslocal);CHKERRQ(ierr);
  ierr = DMGlobalToLocalBegin(cda,global,INSERT_VALUES,local);CHKERRQ(ierr);
  ierr = DMGlobalToLocalEnd(cda,global,INSERT_VALUES,local);CHKERRQ(ierr);
  PetscFunctionReturn(0);
}
开发者ID:000Justin000，项目名称:ATPESC，代码行数:27，代码来源:ex3.c

示例14: SetCoordinates2d

PetscErrorCode SetCoordinates2d(DM da)
{
  PetscErrorCode ierr;
  PetscInt       i,j,mstart,m,nstart,n;
  Vec            local,global;
  DMDACoor2d     **coors,**coorslocal;
  DM             cda;

  PetscFunctionBeginUser;
  ierr = DMDASetUniformCoordinates(da,0.0,1.0,0.0,1.0,0.0,1.0);CHKERRQ(ierr);
  ierr = DMGetCoordinateDM(da,&cda);CHKERRQ(ierr);
  ierr = DMGetCoordinates(da,&global);CHKERRQ(ierr);
  ierr = DMGetCoordinatesLocal(da,&local);CHKERRQ(ierr);
  ierr = DMDAVecGetArray(cda,global,&coors);CHKERRQ(ierr);
  ierr = DMDAVecGetArrayRead(cda,local,&coorslocal);CHKERRQ(ierr);
  ierr = DMDAGetCorners(cda,&mstart,&nstart,0,&m,&n,0);CHKERRQ(ierr);
  for (i=mstart; i<mstart+m; i++) {
    for (j=nstart; j<nstart+n; j++) {
      if (i % 2) {
        coors[j][i].x = coorslocal[j][i-1].x + .1*(coorslocal[j][i+1].x - coorslocal[j][i-1].x);
      }
      if (j % 2) {
        coors[j][i].y = coorslocal[j-1][i].y + .3*(coorslocal[j+1][i].y - coorslocal[j-1][i].y);
      }
    }
  }
  ierr = DMDAVecRestoreArray(cda,global,&coors);CHKERRQ(ierr);
  ierr = DMDAVecRestoreArrayRead(cda,local,&coorslocal);CHKERRQ(ierr);

  ierr = DMGlobalToLocalBegin(cda,global,INSERT_VALUES,local);CHKERRQ(ierr);
  ierr = DMGlobalToLocalEnd(cda,global,INSERT_VALUES,local);CHKERRQ(ierr);
  PetscFunctionReturn(0);
}
开发者ID:000Justin000，项目名称:ATPESC，代码行数:33，代码来源:ex3.c

示例15: TSComputeRHSJacobian_DMDA

static PetscErrorCode TSComputeRHSJacobian_DMDA(TS ts,PetscReal ptime,Vec X,Mat *A,Mat *B,MatStructure *mstr,void *ctx)
{
  PetscErrorCode ierr;
  DM             dm;
  DMTS_DA        *dmdats = (DMTS_DA*)ctx;
  DMDALocalInfo  info;
  Vec            Xloc;
  void           *x;

  PetscFunctionBegin;
  if (!dmdats->rhsfunctionlocal) SETERRQ(PetscObjectComm((PetscObject)ts),PETSC_ERR_PLIB,"Corrupt context");
  ierr = TSGetDM(ts,&dm);CHKERRQ(ierr);

  if (dmdats->rhsjacobianlocal) {
    ierr = DMGetLocalVector(dm,&Xloc);CHKERRQ(ierr);
    ierr = DMGlobalToLocalBegin(dm,X,INSERT_VALUES,Xloc);CHKERRQ(ierr);
    ierr = DMGlobalToLocalEnd(dm,X,INSERT_VALUES,Xloc);CHKERRQ(ierr);
    ierr = DMDAGetLocalInfo(dm,&info);CHKERRQ(ierr);
    ierr = DMDAVecGetArray(dm,Xloc,&x);CHKERRQ(ierr);
    CHKMEMQ;
    ierr = (*dmdats->rhsjacobianlocal)(&info,ptime,x,*A,*B,mstr,dmdats->rhsjacobianlocalctx);CHKERRQ(ierr);
    CHKMEMQ;
    ierr = DMDAVecRestoreArray(dm,Xloc,&x);CHKERRQ(ierr);
    ierr = DMRestoreLocalVector(dm,&Xloc);CHKERRQ(ierr);
  } else SETERRQ(PetscObjectComm((PetscObject)ts),PETSC_ERR_PLIB,"TSComputeRHSJacobian_DMDA() called without calling DMDATSSetRHSJacobian()");
  /* This will be redundant if the user called both, but it's too common to forget. */
  if (*A != *B) {
    ierr = MatAssemblyBegin(*A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);
    ierr = MatAssemblyEnd(*A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);
  }
  PetscFunctionReturn(0);
}
开发者ID:ZJLi2013，项目名称:petsc，代码行数:32，代码来源:dmdats.c


注：本文中的DMGlobalToLocalBegin函数示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。