Date: 2015-10-02T22:13:19+00:00

Actual source code: daview.c
petsc-3.6.2 2015-10-02
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      2: /*
      3:   Code for manipulating distributed regular arrays in parallel.
      4: */

      6: #include <petsc/private/dmdaimpl.h>    /*I   "petscdmda.h"   I*/

      8: #if defined(PETSC_HAVE_MATLAB_ENGINE)
      9: #include <mat.h>   /* MATLAB include file */

     13: PetscErrorCode DMView_DA_Matlab(DM da,PetscViewer viewer)
     14: {
     15:   PetscErrorCode   ierr;
     16:   PetscMPIInt      rank;
     17:   PetscInt         dim,m,n,p,dof,swidth;
     18:   DMDAStencilType  stencil;
     19:   DMBoundaryType   bx,by,bz;
     20:   mxArray          *mx;
     21:   const char       *fnames[] = {"dimension","m","n","p","dof","stencil_width","bx","by","bz","stencil_type"};

     24:   MPI_Comm_rank(PetscObjectComm((PetscObject)da),&rank);
     25:   if (!rank) {
     26:     DMDAGetInfo(da,&dim,&m,&n,&p,0,0,0,&dof,&swidth,&bx,&by,&bz,&stencil);
     27:     mx   = mxCreateStructMatrix(1,1,8,(const char**)fnames);
     28:     if (!mx) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_LIB,"Unable to generate MATLAB struct array to hold DMDA informations");
     29:     mxSetFieldByNumber(mx,0,0,mxCreateDoubleScalar((double)dim));
     30:     mxSetFieldByNumber(mx,0,1,mxCreateDoubleScalar((double)m));
     31:     mxSetFieldByNumber(mx,0,2,mxCreateDoubleScalar((double)n));
     32:     mxSetFieldByNumber(mx,0,3,mxCreateDoubleScalar((double)p));
     33:     mxSetFieldByNumber(mx,0,4,mxCreateDoubleScalar((double)dof));
     34:     mxSetFieldByNumber(mx,0,5,mxCreateDoubleScalar((double)swidth));
     35:     mxSetFieldByNumber(mx,0,6,mxCreateDoubleScalar((double)bx));
     36:     mxSetFieldByNumber(mx,0,7,mxCreateDoubleScalar((double)by));
     37:     mxSetFieldByNumber(mx,0,8,mxCreateDoubleScalar((double)bz));
     38:     mxSetFieldByNumber(mx,0,9,mxCreateDoubleScalar((double)stencil));
     39:     PetscObjectName((PetscObject)da);
     40:     PetscViewerMatlabPutVariable(viewer,((PetscObject)da)->name,mx);
     41:   }
     42:   return(0);
     43: }
     44: #endif

     48: PetscErrorCode DMView_DA_Binary(DM da,PetscViewer viewer)
     49: {
     50:   PetscErrorCode   ierr;
     51:   PetscMPIInt      rank;
     52:   PetscInt         dim,m,n,p,dof,swidth,M,N,P;
     53:   DMDAStencilType  stencil;
     54:   DMBoundaryType   bx,by,bz;
     55:   MPI_Comm         comm;
     56:   PetscBool        coors = PETSC_FALSE;

     59:   PetscObjectGetComm((PetscObject)da,&comm);

     61:   DMDAGetInfo(da,&dim,&m,&n,&p,&M,&N,&P,&dof,&swidth,&bx,&by,&bz,&stencil);
     62:   MPI_Comm_rank(comm,&rank);
     63:   if (!rank) {
     64:     PetscViewerBinaryWrite(viewer,&dim,1,PETSC_INT,PETSC_FALSE);
     65:     PetscViewerBinaryWrite(viewer,&m,1,PETSC_INT,PETSC_FALSE);
     66:     PetscViewerBinaryWrite(viewer,&n,1,PETSC_INT,PETSC_FALSE);
     67:     PetscViewerBinaryWrite(viewer,&p,1,PETSC_INT,PETSC_FALSE);
     68:     PetscViewerBinaryWrite(viewer,&dof,1,PETSC_INT,PETSC_FALSE);
     69:     PetscViewerBinaryWrite(viewer,&swidth,1,PETSC_INT,PETSC_FALSE);
     70:     PetscViewerBinaryWrite(viewer,&bx,1,PETSC_ENUM,PETSC_FALSE);
     71:     PetscViewerBinaryWrite(viewer,&by,1,PETSC_ENUM,PETSC_FALSE);
     72:     PetscViewerBinaryWrite(viewer,&bz,1,PETSC_ENUM,PETSC_FALSE);
     73:     PetscViewerBinaryWrite(viewer,&stencil,1,PETSC_ENUM,PETSC_FALSE);
     74:     if (da->coordinates) coors = PETSC_TRUE;
     75:     PetscViewerBinaryWrite(viewer,&coors,1,PETSC_BOOL,PETSC_FALSE);
     76:   }

     78:   /* save the coordinates if they exist to disk (in the natural ordering) */
     79:   if (da->coordinates) {
     80:     VecView(da->coordinates,viewer);
     81:   }
     82:   return(0);
     83: }

     87: PetscErrorCode DMView_DA_VTK(DM da, PetscViewer viewer)
     88: {
     89:   PetscInt       dim, dof, M = 0, N = 0, P = 0;

     93:   DMDAGetInfo(da, &dim, &M, &N, &P, NULL, NULL, NULL, &dof, NULL, NULL, NULL, NULL, NULL);
     94:   if (!da->coordinates) SETERRQ(PetscObjectComm((PetscObject)da),PETSC_ERR_SUP, "VTK output requires DMDA coordinates.");
     95:   /* Write Header */
     96:   PetscViewerASCIIPrintf(viewer,"# vtk DataFile Version 2.0\n");
     97:   PetscViewerASCIIPrintf(viewer,"Structured Mesh Example\n");
     98:   PetscViewerASCIIPrintf(viewer,"ASCII\n");
     99:   PetscViewerASCIIPrintf(viewer,"DATASET STRUCTURED_GRID\n");
    100:   PetscViewerASCIIPrintf(viewer,"DIMENSIONS %d %d %d\n", M, N, P);
    101:   PetscViewerASCIIPrintf(viewer,"POINTS %d double\n", M*N*P);
    102:   if (da->coordinates) {
    103:     DM  dac;
    104:     Vec natural;

    106:     DMGetCoordinateDM(da, &dac);
    107:     DMDACreateNaturalVector(dac, &natural);
    108:     PetscObjectSetOptionsPrefix((PetscObject) natural, "coor_");
    109:     DMDAGlobalToNaturalBegin(dac, da->coordinates, INSERT_VALUES, natural);
    110:     DMDAGlobalToNaturalEnd(dac, da->coordinates, INSERT_VALUES, natural);
    111:     PetscViewerPushFormat(viewer, PETSC_VIEWER_ASCII_VTK_COORDS);
    112:     VecView(natural, viewer);
    113:     PetscViewerPopFormat(viewer);
    114:     VecDestroy(&natural);
    115:   }
    116:   return(0);
    117: }

    121: /*@C
    122:    DMDAGetInfo - Gets information about a given distributed array.

    124:    Not Collective

    126:    Input Parameter:
    127: .  da - the distributed array

    129:    Output Parameters:
    130: +  dim      - dimension of the distributed array (1, 2, or 3)
    131: .  M, N, P  - global dimension in each direction of the array
    132: .  m, n, p  - corresponding number of procs in each dimension
    133: .  dof      - number of degrees of freedom per node
    134: .  s        - stencil width
    135: .  bx,by,bz - type of ghost nodes at boundary, one of DM_BOUNDARY_NONE, DM_BOUNDARY_GHOSTED,
    136:               DM_BOUNDARY_MIRROR, DM_BOUNDARY_PERIODIC
    137: -  st       - stencil type, either DMDA_STENCIL_STAR or DMDA_STENCIL_BOX

    139:    Level: beginner

    141:    Note:
    142:    Use NULL (NULL_INTEGER in Fortran) in place of any output parameter that is not of interest.

    144: .keywords: distributed array, get, information

    146: .seealso: DMView(), DMDAGetCorners(), DMDAGetLocalInfo()
    147: @*/
    148: PetscErrorCode  DMDAGetInfo(DM da,PetscInt *dim,PetscInt *M,PetscInt *N,PetscInt *P,PetscInt *m,PetscInt *n,PetscInt *p,PetscInt *dof,PetscInt *s,DMBoundaryType *bx,DMBoundaryType *by,DMBoundaryType *bz,DMDAStencilType *st)
    149: {
    150:   DM_DA *dd = (DM_DA*)da->data;

    154:   if (dim) *dim = da->dim;
    155:   if (M) {
    156:     if (dd->Mo < 0) *M = dd->M;
    157:     else *M = dd->Mo;
    158:   }
    159:   if (N) {
    160:     if (dd->No < 0) *N = dd->N;
    161:     else *N = dd->No;
    162:   }
    163:   if (P) {
    164:     if (dd->Po < 0) *P = dd->P;
    165:     else *P = dd->Po;
    166:   }
    167:   if (m) *m = dd->m;
    168:   if (n) *n = dd->n;
    169:   if (p) *p = dd->p;
    170:   if (dof) *dof = dd->w;
    171:   if (s) *s = dd->s;
    172:   if (bx) *bx = dd->bx;
    173:   if (by) *by = dd->by;
    174:   if (bz) *bz = dd->bz;
    175:   if (st) *st = dd->stencil_type;
    176:   return(0);
    177: }

    181: /*@C
    182:    DMDAGetLocalInfo - Gets information about a given distributed array and this processors location in it

    184:    Not Collective

    186:    Input Parameter:
    187: .  da - the distributed array

    189:    Output Parameters:
    190: .  dainfo - structure containing the information

    192:    Level: beginner

    194: .keywords: distributed array, get, information

    196: .seealso: DMDAGetInfo(), DMDAGetCorners()
    197: @*/
    198: PetscErrorCode  DMDAGetLocalInfo(DM da,DMDALocalInfo *info)
    199: {
    200:   PetscInt w;
    201:   DM_DA    *dd = (DM_DA*)da->data;

    206:   info->da  = da;
    207:   info->dim = da->dim;
    208:   if (dd->Mo < 0) info->mx = dd->M;
    209:   else info->mx = dd->Mo;
    210:   if (dd->No < 0) info->my = dd->N;
    211:   else info->my = dd->No;
    212:   if (dd->Po < 0) info->mz = dd->P;
    213:   else info->mz = dd->Po;
    214:   info->dof = dd->w;
    215:   info->sw  = dd->s;
    216:   info->bx  = dd->bx;
    217:   info->by  = dd->by;
    218:   info->bz  = dd->bz;
    219:   info->st  = dd->stencil_type;

    221:   /* since the xs, xe ... have all been multiplied by the number of degrees
    222:      of freedom per cell, w = dd->w, we divide that out before returning.*/
    223:   w        = dd->w;
    224:   info->xs = dd->xs/w + dd->xo;
    225:   info->xm = (dd->xe - dd->xs)/w;
    226:   /* the y and z have NOT been multiplied by w */
    227:   info->ys = dd->ys + dd->yo;
    228:   info->ym = (dd->ye - dd->ys);
    229:   info->zs = dd->zs + dd->zo;
    230:   info->zm = (dd->ze - dd->zs);

    232:   info->gxs = dd->Xs/w + dd->xo;
    233:   info->gxm = (dd->Xe - dd->Xs)/w;
    234:   /* the y and z have NOT been multiplied by w */
    235:   info->gys = dd->Ys + dd->yo;
    236:   info->gym = (dd->Ye - dd->Ys);
    237:   info->gzs = dd->Zs + dd->zo;
    238:   info->gzm = (dd->Ze - dd->Zs);
    239:   return(0);
    240: }