Date: 2021-03-03T22:27:05+00:00

Actual source code: spacepoint.c
petsc-3.14.5 2021-03-03
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      1: #include <petsc/private/petscfeimpl.h>
      2: #include <petsc/private/dtimpl.h>

      4: static PetscErrorCode PetscSpacePointView_Ascii(PetscSpace sp, PetscViewer viewer)
      5: {
      6:   PetscSpace_Point *pt = (PetscSpace_Point *) sp->data;
      7:   PetscViewerFormat format;
      8:   PetscErrorCode    ierr;

     11:   PetscViewerGetFormat(viewer, &format);
     12:   if (format == PETSC_VIEWER_ASCII_INFO_DETAIL) {
     13:     PetscViewerASCIIPrintf(viewer, "Point space in dimension %d:\n", sp->Nv);
     14:     PetscViewerASCIIPushTab(viewer);
     15:     PetscQuadratureView(pt->quad, viewer);
     16:     PetscViewerASCIIPopTab(viewer);
     17:   } else {
     18:     PetscViewerASCIIPrintf(viewer, "Point space in dimension %d on %d points\n", sp->Nv, pt->quad->numPoints);
     19:   }
     20:   return(0);
     21: }

     23: static PetscErrorCode PetscSpaceView_Point(PetscSpace sp, PetscViewer viewer)
     24: {
     25:   PetscBool      iascii;

     31:   PetscObjectTypeCompare((PetscObject) viewer, PETSCVIEWERASCII, &iascii);
     32:   if (iascii) {PetscSpacePointView_Ascii(sp, viewer);}
     33:   return(0);
     34: }

     36: static PetscErrorCode PetscSpaceSetUp_Point(PetscSpace sp)
     37: {
     38:   PetscSpace_Point *pt = (PetscSpace_Point *) sp->data;
     39:   PetscErrorCode    ierr;

     42:   if (!pt->quad->points && sp->degree >= 0) {
     43:     PetscQuadratureDestroy(&pt->quad);
     44:     PetscDTStroudConicalQuadrature(sp->Nv, sp->Nc, PetscMax(sp->degree + 1, 1), -1.0, 1.0, &pt->quad);
     45:   }
     46:   return(0);
     47: }

     49: static PetscErrorCode PetscSpaceDestroy_Point(PetscSpace sp)
     50: {
     51:   PetscSpace_Point *pt = (PetscSpace_Point *) sp->data;
     52:   PetscErrorCode    ierr;

     55:   PetscQuadratureDestroy(&pt->quad);
     56:   PetscFree(pt);
     57:   return(0);
     58: }

     60: static PetscErrorCode PetscSpaceGetDimension_Point(PetscSpace sp, PetscInt *dim)
     61: {
     62:   PetscSpace_Point *pt = (PetscSpace_Point *) sp->data;

     65:   *dim = pt->quad->numPoints;
     66:   return(0);
     67: }

     69: static PetscErrorCode PetscSpaceEvaluate_Point(PetscSpace sp, PetscInt npoints, const PetscReal points[], PetscReal B[], PetscReal D[], PetscReal H[])
     70: {
     71:   PetscSpace_Point *pt  = (PetscSpace_Point *) sp->data;
     72:   PetscInt          dim = sp->Nv, pdim = pt->quad->numPoints, d, p, i, c;
     73:   PetscErrorCode    ierr;

     76:   if (npoints != pt->quad->numPoints) SETERRQ2(PETSC_COMM_SELF, PETSC_ERR_SUP, "Cannot evaluate Point space on %d points != %d size", npoints, pt->quad->numPoints);
     77:   PetscArrayzero(B, npoints*pdim);
     78:   for (p = 0; p < npoints; ++p) {
     79:     for (i = 0; i < pdim; ++i) {
     80:       for (d = 0; d < dim; ++d) {
     81:         if (PetscAbsReal(points[p*dim+d] - pt->quad->points[p*dim+d]) > 1.0e-10) break;
     82:       }
     83:       if (d >= dim) {B[p*pdim+i] = 1.0; break;}
     84:     }
     85:   }
     86:   /* Replicate for other components */
     87:   for (c = 1; c < sp->Nc; ++c) {
     88:     for (p = 0; p < npoints; ++p) {
     89:       for (i = 0; i < pdim; ++i) {
     90:         B[(c*npoints + p)*pdim + i] = B[p*pdim + i];
     91:       }
     92:     }
     93:   }
     94:   if (D) {PetscArrayzero(D, npoints*pdim*dim);}
     95:   if (H) {PetscArrayzero(H, npoints*pdim*dim*dim);}
     96:   return(0);
     97: }

     99: static PetscErrorCode PetscSpaceInitialize_Point(PetscSpace sp)
    100: {
    102:   sp->ops->setfromoptions = NULL;
    103:   sp->ops->setup          = PetscSpaceSetUp_Point;
    104:   sp->ops->view           = PetscSpaceView_Point;
    105:   sp->ops->destroy        = PetscSpaceDestroy_Point;
    106:   sp->ops->getdimension   = PetscSpaceGetDimension_Point;
    107:   sp->ops->evaluate       = PetscSpaceEvaluate_Point;
    108:   return(0);
    109: }

    111: /*MC
    112:   PETSCSPACEPOINT = "point" - A PetscSpace object that encapsulates functions defined on a set of quadrature points.

    114:   Level: intermediate

    116: .seealso: PetscSpaceType, PetscSpaceCreate(), PetscSpaceSetType()
    117: M*/

    119: PETSC_EXTERN PetscErrorCode PetscSpaceCreate_Point(PetscSpace sp)
    120: {
    121:   PetscSpace_Point *pt;
    122:   PetscErrorCode    ierr;

    126:   PetscNewLog(sp,&pt);
    127:   sp->data = pt;

    129:   sp->Nv = 0;
    130:   sp->maxDegree = PETSC_MAX_INT;
    131:   PetscQuadratureCreate(PETSC_COMM_SELF, &pt->quad);
    132:   PetscQuadratureSetData(pt->quad, 0, 1, 0, NULL, NULL);

    134:   PetscSpaceInitialize_Point(sp);
    135:   return(0);
    136: }

    138: /*@
    139:   PetscSpacePointSetPoints - Sets the evaluation points for the space to coincide with the points of a quadrature rule

    141:   Logically collective

    143:   Input Parameters:
    144: + sp - The PetscSpace
    145: - q  - The PetscQuadrature defining the points

    147:   Level: intermediate

    149: .seealso: PetscSpaceCreate(), PetscSpaceSetType()
    150: @*/
    151: PetscErrorCode PetscSpacePointSetPoints(PetscSpace sp, PetscQuadrature q)
    152: {
    153:   PetscSpace_Point *pt = (PetscSpace_Point *) sp->data;
    154:   PetscErrorCode    ierr;

    159:   PetscQuadratureDestroy(&pt->quad);
    160:   PetscQuadratureDuplicate(q, &pt->quad);
    161:   return(0);
    162: }

    164: /*@
    165:   PetscSpacePointGetPoints - Gets the evaluation points for the space as the points of a quadrature rule

    167:   Logically collective

    169:   Input Parameter:
    170: . sp - The PetscSpace

    172:   Output Parameter:
    173: . q  - The PetscQuadrature defining the points

    175:   Level: intermediate

    177: .seealso: PetscSpaceCreate(), PetscSpaceSetType()
    178: @*/
    179: PetscErrorCode PetscSpacePointGetPoints(PetscSpace sp, PetscQuadrature *q)
    180: {
    181:   PetscSpace_Point *pt = (PetscSpace_Point *) sp->data;

    186:   *q = pt->quad;
    187:   return(0);
    188: }