Actual source code: gr2.c

  1: #define PETSCDM_DLL

  3: /* 
  4:    Plots vectors obtained with DACreate2d()
  5: */

 7:  #include src/dm/da/daimpl.h
 8:  #include private/vecimpl.h

 10: #if defined(PETSC_HAVE_PNETCDF)
 12: #include "pnetcdf.h"
 14: #endif


 17: /*
 18:         The data that is passed into the graphics callback
 19: */
 20: typedef struct {
 21:   PetscInt     m,n,step,k;
 22:   PetscReal    min,max,scale;
 23:   PetscScalar  *xy,*v;
 24:   PetscTruth   showgrid;
 25: } ZoomCtx;

 27: /*
 28:        This does the drawing for one particular field 
 29:     in one particular set of coordinates. It is a callback
 30:     called from PetscDrawZoom()
 31: */
 34: PetscErrorCode VecView_MPI_Draw_DA2d_Zoom(PetscDraw draw,void *ctx)
 35: {
 36:   ZoomCtx        *zctx = (ZoomCtx*)ctx;
 38:   PetscInt       m,n,i,j,k,step,id,c1,c2,c3,c4;
 39:   PetscReal      s,min,x1,x2,x3,x4,y_1,y2,y3,y4;
 40:   PetscScalar   *v,*xy;

 43:   m    = zctx->m;
 44:   n    = zctx->n;
 45:   step = zctx->step;
 46:   k    = zctx->k;
 47:   v    = zctx->v;
 48:   xy   = zctx->xy;
 49:   s    = zctx->scale;
 50:   min  = zctx->min;
 51: 
 52:   /* PetscDraw the contour plot patch */
 53:   for (j=0; j<n-1; j++) {
 54:     for (i=0; i<m-1; i++) {
 55: #if !defined(PETSC_USE_COMPLEX)
 56:       id = i+j*m;    x1 = xy[2*id];y_1 = xy[2*id+1];c1 = (int)(PETSC_DRAW_BASIC_COLORS+s*(v[k+step*id]-min));
 57:       id = i+j*m+1;  x2 = xy[2*id];y2  = y_1;       c2 = (int)(PETSC_DRAW_BASIC_COLORS+s*(v[k+step*id]-min));
 58:       id = i+j*m+1+m;x3 = x2;      y3  = xy[2*id+1];c3 = (int)(PETSC_DRAW_BASIC_COLORS+s*(v[k+step*id]-min));
 59:       id = i+j*m+m;  x4 = x1;      y4  = y3;        c4 = (int)(PETSC_DRAW_BASIC_COLORS+s*(v[k+step*id]-min));
 60: #else
 61:       id = i+j*m;    x1 = PetscRealPart(xy[2*id]);y_1 = PetscRealPart(xy[2*id+1]);c1 = (int)(PETSC_DRAW_BASIC_COLORS+s*(PetscRealPart(v[k+step*id])-min));
 62:       id = i+j*m+1;  x2 = PetscRealPart(xy[2*id]);y2  = y_1;       c2 = (int)(PETSC_DRAW_BASIC_COLORS+s*(PetscRealPart(v[k+step*id])-min));
 63:       id = i+j*m+1+m;x3 = x2;      y3  = PetscRealPart(xy[2*id+1]);c3 = (int)(PETSC_DRAW_BASIC_COLORS+s*(PetscRealPart(v[k+step*id])-min));
 64:       id = i+j*m+m;  x4 = x1;      y4  = y3;        c4 = (int)(PETSC_DRAW_BASIC_COLORS+s*(PetscRealPart(v[k+step*id])-min));
 65: #endif
 66:       PetscDrawTriangle(draw,x1,y_1,x2,y2,x3,y3,c1,c2,c3);
 67:       PetscDrawTriangle(draw,x1,y_1,x3,y3,x4,y4,c1,c3,c4);
 68:       if (zctx->showgrid) {
 69:         PetscDrawLine(draw,x1,y_1,x2,y2,PETSC_DRAW_BLACK);
 70:         PetscDrawLine(draw,x2,y2,x3,y3,PETSC_DRAW_BLACK);
 71:         PetscDrawLine(draw,x3,y3,x4,y4,PETSC_DRAW_BLACK);
 72:         PetscDrawLine(draw,x4,y4,x1,y_1,PETSC_DRAW_BLACK);
 73:       }
 74:     }
 75:   }
 76:   return(0);
 77: }

 81: PetscErrorCode VecView_MPI_Draw_DA2d(Vec xin,PetscViewer viewer)
 82: {
 83:   DA                 da,dac,dag;
 84:   PetscErrorCode     ierr;
 85:   PetscMPIInt        rank;
 86:   PetscInt           igstart,N,s,M,istart,isize,jgstart,*lx,*ly,w;
 87:   PetscReal          coors[4],ymin,ymax,xmin,xmax;
 88:   PetscDraw          draw,popup;
 89:   PetscTruth         isnull,useports;
 90:   MPI_Comm           comm;
 91:   Vec                xlocal,xcoor,xcoorl;
 92:   DAPeriodicType     periodic;
 93:   DAStencilType      st;
 94:   ZoomCtx            zctx;
 95:   PetscDrawViewPorts *ports;
 96:   PetscViewerFormat  format;

 99:   PetscViewerDrawGetDraw(viewer,0,&draw);
100:   PetscDrawIsNull(draw,&isnull); if (isnull) return(0);

102:   PetscObjectQuery((PetscObject)xin,"DA",(PetscObject*)&da);
103:   if (!da) SETERRQ(PETSC_ERR_ARG_WRONG,"Vector not generated from a DA");

105:   PetscObjectGetComm((PetscObject)xin,&comm);
106:   MPI_Comm_rank(comm,&rank);

108:   DAGetInfo(da,0,&M,&N,0,&zctx.m,&zctx.n,0,&w,&s,&periodic,&st);
109:   DAGetOwnershipRange(da,&lx,&ly,PETSC_NULL);

111:   /* 
112:         Obtain a sequential vector that is going to contain the local values plus ONE layer of 
113:      ghosted values to draw the graphics from. We also need its corresponding DA (dac) that will
114:      update the local values pluse ONE layer of ghost values. 
115:   */
116:   PetscObjectQuery((PetscObject)da,"GraphicsGhosted",(PetscObject*)&xlocal);
117:   if (!xlocal) {
118:     if (periodic != DA_NONPERIODIC || s != 1 || st != DA_STENCIL_BOX) {
119:       /* 
120:          if original da is not of stencil width one, or periodic or not a box stencil then
121:          create a special DA to handle one level of ghost points for graphics
122:       */
123:       DACreate2d(comm,DA_NONPERIODIC,DA_STENCIL_BOX,M,N,zctx.m,zctx.n,w,1,lx,ly,&dac);
124:       PetscInfo(da,"Creating auxilary DA for managing graphics ghost points\n");
125:     } else {
126:       /* otherwise we can use the da we already have */
127:       dac = da;
128:     }
129:     /* create local vector for holding ghosted values used in graphics */
130:     DACreateLocalVector(dac,&xlocal);
131:     if (dac != da) {
132:       /* don't keep any public reference of this DA, is is only available through xlocal */
133:       DADestroy(dac);
134:     } else {
135:       /* remove association between xlocal and da, because below we compose in the opposite
136:          direction and if we left this connect we'd get a loop, so the objects could 
137:          never be destroyed */
138:       PetscObjectCompose((PetscObject)xlocal,"DA",0);
139:     }
140:     PetscObjectCompose((PetscObject)da,"GraphicsGhosted",(PetscObject)xlocal);
141:     PetscObjectDereference((PetscObject)xlocal);
142:   } else {
143:     if (periodic == DA_NONPERIODIC && s == 1 && st == DA_STENCIL_BOX) {
144:       dac = da;
145:     } else {
146:       PetscObjectQuery((PetscObject)xlocal,"DA",(PetscObject*)&dac);
147:     }
148:   }

150:   /*
151:       Get local (ghosted) values of vector
152:   */
153:   DAGlobalToLocalBegin(dac,xin,INSERT_VALUES,xlocal);
154:   DAGlobalToLocalEnd(dac,xin,INSERT_VALUES,xlocal);
155:   VecGetArray(xlocal,&zctx.v);

157:   /* get coordinates of nodes */
158:   DAGetCoordinates(da,&xcoor);
159:   if (!xcoor) {
160:     DASetUniformCoordinates(da,0.0,1.0,0.0,1.0,0.0,0.0);
161:     DAGetCoordinates(da,&xcoor);
162:   }

164:   /*
165:       Determine the min and max  coordinates in plot 
166:   */
167:   VecStrideMin(xcoor,0,PETSC_NULL,&xmin);
168:   VecStrideMax(xcoor,0,PETSC_NULL,&xmax);
169:   VecStrideMin(xcoor,1,PETSC_NULL,&ymin);
170:   VecStrideMax(xcoor,1,PETSC_NULL,&ymax);
171:   coors[0] = xmin - .05*(xmax- xmin); coors[2] = xmax + .05*(xmax - xmin);
172:   coors[1] = ymin - .05*(ymax- ymin); coors[3] = ymax + .05*(ymax - ymin);
173:   PetscInfo4(da,"Preparing DA 2d contour plot coordinates %G %G %G %G\n",coors[0],coors[1],coors[2],coors[3]);

175:   /*
176:        get local ghosted version of coordinates 
177:   */
178:   PetscObjectQuery((PetscObject)da,"GraphicsCoordinateGhosted",(PetscObject*)&xcoorl);
179:   if (!xcoorl) {
180:     /* create DA to get local version of graphics */
181:     DACreate2d(comm,DA_NONPERIODIC,DA_STENCIL_BOX,M,N,zctx.m,zctx.n,2,1,lx,ly,&dag);
182:     PetscInfo(dag,"Creating auxilary DA for managing graphics coordinates ghost points\n");
183:     DACreateLocalVector(dag,&xcoorl);
184:     PetscObjectCompose((PetscObject)da,"GraphicsCoordinateGhosted",(PetscObject)xcoorl);
185:     DADestroy(dag);/* dereference dag */
186:     PetscObjectDereference((PetscObject)xcoorl);
187:   } else {
188:     PetscObjectQuery((PetscObject)xcoorl,"DA",(PetscObject*)&dag);
189:   }
190:   DAGlobalToLocalBegin(dag,xcoor,INSERT_VALUES,xcoorl);
191:   DAGlobalToLocalEnd(dag,xcoor,INSERT_VALUES,xcoorl);
192:   VecGetArray(xcoorl,&zctx.xy);
193: 
194:   /*
195:         Get information about size of area each processor must do graphics for
196:   */
197:   DAGetInfo(dac,0,&M,&N,0,0,0,0,&zctx.step,0,&periodic,0);
198:   DAGetGhostCorners(dac,&igstart,&jgstart,0,&zctx.m,&zctx.n,0);
199:   DAGetCorners(dac,&istart,0,0,&isize,0,0);

201:   PetscOptionsHasName(PETSC_NULL,"-draw_contour_grid",&zctx.showgrid);

203:   PetscViewerGetFormat(viewer,&format);
204:   PetscOptionsHasName(PETSC_NULL,"-draw_ports",&useports);
205:   if (useports || format == PETSC_VIEWER_DRAW_PORTS){
206:     PetscDrawSynchronizedClear(draw);
207:     PetscDrawViewPortsCreate(draw,zctx.step,&ports);
208:   }
209:   /*
210:      Loop over each field; drawing each in a different window
211:   */
212:   for (zctx.k=0; zctx.k<zctx.step; zctx.k++) {
213:     if (useports) {
214:       PetscDrawViewPortsSet(ports,zctx.k);
215:     } else {
216:       PetscViewerDrawGetDraw(viewer,zctx.k,&draw);
217:       PetscDrawSynchronizedClear(draw);
218:     }

220:     /*
221:         Determine the min and max color in plot 
222:     */
223:     VecStrideMin(xin,zctx.k,PETSC_NULL,&zctx.min);
224:     VecStrideMax(xin,zctx.k,PETSC_NULL,&zctx.max);
225:     if (zctx.min == zctx.max) {
226:       zctx.min -= 1.e-12;
227:       zctx.max += 1.e-12;
228:     }

230:     if (!rank) {
231:       char *title;

233:       DAGetFieldName(da,zctx.k,&title);
234:       if (title) {
235:         PetscDrawSetTitle(draw,title);
236:       }
237:     }
238:     PetscDrawSetCoordinates(draw,coors[0],coors[1],coors[2],coors[3]);
239:     PetscInfo2(da,"DA 2d contour plot min %G max %G\n",zctx.min,zctx.max);

241:     PetscDrawGetPopup(draw,&popup);
242:     if (popup) {PetscDrawScalePopup(popup,zctx.min,zctx.max);}

244:     zctx.scale = (245.0 - PETSC_DRAW_BASIC_COLORS)/(zctx.max - zctx.min);

246:     PetscDrawZoom(draw,VecView_MPI_Draw_DA2d_Zoom,&zctx);
247:   }
248:   if (useports){
249:     PetscDrawViewPortsDestroy(ports);
250:   }

252:   VecRestoreArray(xcoorl,&zctx.xy);
253:   VecRestoreArray(xlocal,&zctx.v);
254:   return(0);
255: }

257: EXTERN PetscErrorCode VecView_MPI_HDF4_Ex(Vec X, PetscViewer viewer, PetscInt d, PetscInt *dims);

259: #if defined(PETSC_HAVE_HDF4)
262: PetscErrorCode VecView_MPI_HDF4_DA2d(Vec xin,PetscViewer viewer)
263: {
265:   PetscInt       dims[2];
266:   DA             da;
267:   Vec            natural;


271:   PetscObjectQuery((PetscObject)xin,"DA",(PetscObject*)&da);
272:   if (!da) SETERRQ(PETSC_ERR_ARG_WRONG,"Vector not generated from a DA");

274:   dims[0] = da->M;
275:   dims[1] = da->N;

277:   DACreateNaturalVector(da,&natural);
278:   DAGlobalToNaturalBegin(da,xin,INSERT_VALUES,natural);
279:   DAGlobalToNaturalEnd(da,xin,INSERT_VALUES,natural);
280:   VecView_MPI_HDF4_Ex(natural, viewer, 2, dims);
281:   VecDestroy(natural);
282:   return(0);
283: }
284: #endif

286: #if defined(PETSC_HAVE_PNETCDF)
289: PetscErrorCode VecView_MPI_Netcdf_DA(Vec xin,PetscViewer viewer)
290: {
292:   PetscInt       ncid,xstart,xdim_num=1;
293:   PetscInt       dim,m,n,p,dof,swidth,M,N,P;
294:   PetscInt       xin_dim,xin_id,xin_n,xin_N,xyz_dim,xyz_id,xyz_n,xyz_N;
295:   PetscInt       *lx,*ly,*lz;
296:   PetscScalar    *xarray;
297:   DA             da,dac;
298:   Vec            natural,xyz;
299:   DAStencilType  stencil;
300:   DAPeriodicType periodic;
301:   MPI_Comm       comm;

304:   PetscObjectGetComm((PetscObject)xin,&comm);
305:   PetscObjectQuery((PetscObject)xin,"DA",(PetscObject*)&da);
306:   if (!da) SETERRQ(PETSC_ERR_ARG_WRONG,"Vector not generated from a DA");
307:   DAGetInfo(da,&dim,&m,&n,&p,&M,&N,&P,&dof,&swidth,&periodic,&stencil);

309:   /* create the appropriate DA to map the coordinates to natural ordering */
310:   DAGetOwnershipRange(da,&lx,&ly,&lz);
311:   if (dim == 1) {
312:     DACreate1d(comm,DA_NONPERIODIC,m,dim,0,lx,&dac);
313:   } else if (dim == 2) {
314:     DACreate2d(comm,DA_NONPERIODIC,DA_STENCIL_BOX,m,n,M,N,dim,0,lx,ly,&dac);
315:   } else if (dim == 3) {
316:     DACreate3d(comm,DA_NONPERIODIC,DA_STENCIL_BOX,m,n,p,M,N,P,dim,0,lx,ly,lz,&dac);
317:   } else {
318:     SETERRQ1(PETSC_ERR_ARG_CORRUPT,"Dimension is not 1 2 or 3: %D\n",dim);
319:   }
320:   DACreateNaturalVector(dac,&xyz);
321:   PetscObjectSetOptionsPrefix((PetscObject)xyz,"coor_");
322:   DAGlobalToNaturalBegin(dac,da->coordinates,INSERT_VALUES,xyz);
323:   DAGlobalToNaturalEnd(dac,da->coordinates,INSERT_VALUES,xyz);
324:   /* Create the DA vector in natural ordering */
325:   DACreateNaturalVector(da,&natural);
326:   DAGlobalToNaturalBegin(da,xin,INSERT_VALUES,natural);
327:   DAGlobalToNaturalEnd(da,xin,INSERT_VALUES,natural);
328:   /* Write the netCDF dataset */
329:   PetscViewerNetcdfGetID(viewer,&ncid);
330:   if (ncid < 0) SETERRQ(PETSC_ERR_ORDER,"First call PetscViewerNetcdfOpen to create NetCDF dataset");
331:   /* define dimensions */
332:   VecGetSize(xin,&xin_N);
333:   VecGetLocalSize(xin,&xin_n);
334:   ncmpi_def_dim(ncid,"PETSc_DA_Vector_Global_Size",xin_N,&xin_dim);
335:   VecGetSize(xyz,&xyz_N);
336:   VecGetLocalSize(xyz,&xyz_n);
337:   ncmpi_def_dim(ncid,"PETSc_DA_Coordinate_Vector_Global_Size",xyz_N,&xyz_dim);
338:   /* define variables */
339:   ncmpi_def_var(ncid,"PETSc_DA_Vector",NC_DOUBLE,xdim_num,&xin_dim,&xin_id);
340:   ncmpi_def_var(ncid,"PETSc_DA_Coordinate_Vector",NC_DOUBLE,xdim_num,&xyz_dim,&xyz_id);
341:   /* leave define mode */
342:   ncmpi_enddef(ncid);
343:   /* store the vector */
344:   VecGetArray(xin,&xarray);
345:   VecGetOwnershipRange(xin,&xstart,PETSC_NULL);
346:   ncmpi_put_vara_double_all(ncid,xin_id,(const MPI_Offset*)&xstart,(const MPI_Offset*)&xin_n,xarray);
347:   VecRestoreArray(xin,&xarray);
348:   /* store the coordinate vector */
349:   VecGetArray(xyz,&xarray);
350:   VecGetOwnershipRange(xyz,&xstart,PETSC_NULL);
351:   ncmpi_put_vara_double_all(ncid,xyz_id,(const MPI_Offset*)&xstart,(const MPI_Offset*)&xyz_n,xarray);
352:   VecRestoreArray(xyz,&xarray);
353:   /* destroy the vectors and da */
354:   VecDestroy(natural);
355:   VecDestroy(xyz);
356:   DADestroy(dac);
357:   return(0);
358: }
359: #endif

361: EXTERN PetscErrorCode VecView_MPI_Draw_DA1d(Vec,PetscViewer);

366: PetscErrorCode PETSCDM_DLLEXPORT VecView_MPI_DA(Vec xin,PetscViewer viewer)
367: {
368:   DA             da;
370:   PetscInt       dim;
371:   Vec            natural;
372:   PetscTruth     isdraw;
373: #if defined(PETSC_HAVE_HDF4)
374:   PetscTruth     ishdf4;
375: #endif
376: #if defined(PETSC_HAVE_PNETCDF)
377:   PetscTruth     isnetcdf;
378: #endif
379:   const char     *prefix;

382:   PetscObjectQuery((PetscObject)xin,"DA",(PetscObject*)&da);
383:   if (!da) SETERRQ(PETSC_ERR_ARG_WRONG,"Vector not generated from a DA");
384:   PetscTypeCompare((PetscObject)viewer,PETSC_VIEWER_DRAW,&isdraw);
385: #if defined(PETSC_HAVE_HDF4)
386:   PetscTypeCompare((PetscObject)viewer,PETSC_VIEWER_HDF4,&ishdf4);
387: #endif
388: #if defined(PETSC_HAVE_PNETCDF)
389:   PetscTypeCompare((PetscObject)viewer,PETSC_VIEWER_NETCDF,&isnetcdf);
390: #endif
391:   if (isdraw) {
392:     DAGetInfo(da,&dim,0,0,0,0,0,0,0,0,0,0);
393:     if (dim == 1) {
394:       VecView_MPI_Draw_DA1d(xin,viewer);
395:     } else if (dim == 2) {
396:       VecView_MPI_Draw_DA2d(xin,viewer);
397:     } else {
398:       SETERRQ1(PETSC_ERR_SUP,"Cannot graphically view vector associated with this dimensional DA %D",dim);
399:     }
400: #if defined(PETSC_HAVE_HDF4)
401:   } else if (ishdf4) {
402:     DAGetInfo(da,&dim,0,0,0,0,0,0,0,0,0,0);
403:     switch (dim) {
404:     case 2:
405:       VecView_MPI_HDF4_DA2d(xin,viewer);
406:       break;
407:     default:
408:       SETERRQ1(PETSC_ERR_SUP,"Cannot view HDF4 vector associated with this dimensional DA %D",dim);
409:     }
410: #endif
411: #if defined(PETSC_HAVE_PNETCDF)
412:   } else if (isnetcdf) {
413:     VecView_MPI_Netcdf_DA(xin,viewer);
414: #endif
415:   } else {
416:     /* call viewer on natural ordering */
417:     PetscObjectGetOptionsPrefix((PetscObject)xin,&prefix);
418:     DACreateNaturalVector(da,&natural);
419:     PetscObjectSetOptionsPrefix((PetscObject)natural,prefix);
420:     DAGlobalToNaturalBegin(da,xin,INSERT_VALUES,natural);
421:     DAGlobalToNaturalEnd(da,xin,INSERT_VALUES,natural);
422:     PetscObjectName((PetscObject)xin);
423:     PetscObjectSetName((PetscObject)natural,xin->name);
424:     VecView(natural,viewer);
425:     VecDestroy(natural);
426:   }
427:   return(0);
428: }

434: PetscErrorCode PETSCDM_DLLEXPORT VecLoadIntoVector_Binary_DA(PetscViewer viewer,Vec xin)
435: {
436:   DA             da;
438:   Vec            natural;
439:   const char     *prefix;

442:   PetscObjectQuery((PetscObject)xin,"DA",(PetscObject*)&da);
443:   if (!da) SETERRQ(PETSC_ERR_ARG_WRONG,"Vector not generated from a DA");
444:   PetscObjectGetOptionsPrefix((PetscObject)xin,&prefix);
445:   DACreateNaturalVector(da,&natural);
446:   PetscObjectSetOptionsPrefix((PetscObject)natural,prefix);
447:   VecLoadIntoVector(viewer,natural);
448:   DANaturalToGlobalBegin(da,natural,INSERT_VALUES,xin);
449:   DANaturalToGlobalEnd(da,natural,INSERT_VALUES,xin);
450:   VecDestroy(natural);
451:   PetscInfo(xin,"Loading vector from natural ordering into DA\n");
452:   return(0);
453: }