1 2 /* 3 Plots vectors obtained with DMDACreate1d() 4 */ 5 6 #include <petsc-private/daimpl.h> /*I "petscdmda.h" I*/ 7 8 #undef __FUNCT__ 9 #define __FUNCT__ "DMDASetUniformCoordinates" 10 /*@ 11 DMDASetUniformCoordinates - Sets a DMDA coordinates to be a uniform grid 12 13 Collective on DMDA 14 15 Input Parameters: 16 + da - the distributed array object 17 . xmin,xmax - extremes in the x direction 18 . ymin,ymax - extremes in the y direction (use PETSC_NULL for 1 dimensional problems) 19 - zmin,zmax - extremes in the z direction (use PETSC_NULL for 1 or 2 dimensional problems) 20 21 Level: beginner 22 23 .seealso: DMSetCoordinates(), DMGetCoordinates(), DMDACreate1d(), DMDACreate2d(), DMDACreate3d() 24 25 @*/ 26 PetscErrorCode DMDASetUniformCoordinates(DM da,PetscReal xmin,PetscReal xmax,PetscReal ymin,PetscReal ymax,PetscReal zmin,PetscReal zmax) 27 { 28 MPI_Comm comm; 29 PetscSection section; 30 DM cda; 31 DMDABoundaryType bx,by,bz; 32 Vec xcoor; 33 PetscScalar *coors; 34 PetscReal hx,hy,hz_; 35 PetscInt i,j,k,M,N,P,istart,isize,jstart,jsize,kstart,ksize,dim,cnt; 36 PetscErrorCode ierr; 37 38 PetscFunctionBegin; 39 PetscValidHeaderSpecific(da,DM_CLASSID,1); 40 ierr = DMDAGetInfo(da,&dim,&M,&N,&P,0,0,0,0,0,&bx,&by,&bz,0);CHKERRQ(ierr); 41 if (xmax <= xmin) SETERRQ2(((PetscObject)da)->comm,PETSC_ERR_ARG_INCOMP,"xmax must be larger than xmin %G %G",xmin,xmax); 42 if ((ymax <= ymin) && (dim > 1)) SETERRQ2(((PetscObject)da)->comm,PETSC_ERR_ARG_INCOMP,"ymax must be larger than ymin %G %G",ymin,ymax); 43 if ((zmax <= zmin) && (dim > 2)) SETERRQ2(((PetscObject)da)->comm,PETSC_ERR_ARG_INCOMP,"zmax must be larger than zmin %G %G",zmin,zmax); 44 ierr = PetscObjectGetComm((PetscObject)da,&comm);CHKERRQ(ierr); 45 ierr = DMGetDefaultSection(da,§ion);CHKERRQ(ierr); 46 ierr = DMDAGetCorners(da,&istart,&jstart,&kstart,&isize,&jsize,&ksize);CHKERRQ(ierr); 47 ierr = DMGetCoordinateDM(da, &cda);CHKERRQ(ierr); 48 if (section) { 49 /* This would be better as a vector, but this is compatible */ 50 PetscInt numComp[3] = {1, 1, 1}; 51 PetscInt numVertexDof[3] = {1, 1, 1}; 52 53 ierr = DMDASetFieldName(cda, 0, "x");CHKERRQ(ierr); 54 if (dim > 1) {ierr = DMDASetFieldName(cda, 1, "y");CHKERRQ(ierr);} 55 if (dim > 2) {ierr = DMDASetFieldName(cda, 2, "z");CHKERRQ(ierr);} 56 ierr = DMDACreateSection(cda, numComp, numVertexDof, PETSC_NULL, PETSC_NULL);CHKERRQ(ierr); 57 } 58 ierr = DMCreateGlobalVector(cda, &xcoor);CHKERRQ(ierr); 59 if (section) { 60 PetscSection csection; 61 PetscInt vStart, vEnd; 62 63 ierr = DMGetDefaultGlobalSection(cda,&csection);CHKERRQ(ierr); 64 ierr = VecGetArray(xcoor,&coors);CHKERRQ(ierr); 65 ierr = DMDAGetHeightStratum(da, dim, &vStart, &vEnd);CHKERRQ(ierr); 66 if (bx == DMDA_BOUNDARY_PERIODIC) hx = (xmax-xmin)/(M+1); 67 else hx = (xmax-xmin)/(M ? M : 1); 68 if (by == DMDA_BOUNDARY_PERIODIC) hy = (ymax-ymin)/(N+1); 69 else hy = (ymax-ymin)/(N ? N : 1); 70 if (bz == DMDA_BOUNDARY_PERIODIC) hz_ = (zmax-zmin)/(P+1); 71 else hz_ = (zmax-zmin)/(P ? P : 1); 72 switch (dim) { 73 case 1: 74 for (i = 0; i < isize+1; ++i) { 75 PetscInt v = i+vStart, dof, off; 76 77 ierr = PetscSectionGetDof(csection, v, &dof);CHKERRQ(ierr); 78 ierr = PetscSectionGetOffset(csection, v, &off);CHKERRQ(ierr); 79 if (off >= 0) { 80 coors[off] = xmin + hx*(i+istart); 81 } 82 } 83 break; 84 case 2: 85 for (j = 0; j < jsize+1; ++j) { 86 for (i = 0; i < isize+1; ++i) { 87 PetscInt v = j*(isize+1)+i+vStart, dof, off; 88 89 ierr = PetscSectionGetDof(csection, v, &dof);CHKERRQ(ierr); 90 ierr = PetscSectionGetOffset(csection, v, &off);CHKERRQ(ierr); 91 if (off >= 0) { 92 coors[off+0] = xmin + hx*(i+istart); 93 coors[off+1] = ymin + hy*(j+jstart); 94 } 95 } 96 } 97 break; 98 case 3: 99 for (k = 0; k < ksize+1; ++k) { 100 for (j = 0; j < jsize+1; ++j) { 101 for (i = 0; i < isize+1; ++i) { 102 PetscInt v = (k*(jsize+1)+j)*(isize+1)+i+vStart, dof, off; 103 104 ierr = PetscSectionGetDof(csection, v, &dof);CHKERRQ(ierr); 105 ierr = PetscSectionGetOffset(csection, v, &off);CHKERRQ(ierr); 106 if (off >= 0) { 107 coors[off+0] = xmin + hx*(i+istart); 108 coors[off+1] = ymin + hy*(j+jstart); 109 coors[off+2] = zmin + hz_*(k+kstart); 110 } 111 } 112 } 113 } 114 break; 115 default: 116 SETERRQ1(((PetscObject)da)->comm,PETSC_ERR_SUP,"Cannot create uniform coordinates for this dimension %D\n",dim); 117 } 118 ierr = VecRestoreArray(xcoor,&coors);CHKERRQ(ierr); 119 ierr = DMSetCoordinates(da,xcoor);CHKERRQ(ierr); 120 ierr = PetscLogObjectParent(da,xcoor);CHKERRQ(ierr); 121 ierr = VecDestroy(&xcoor);CHKERRQ(ierr); 122 PetscFunctionReturn(0); 123 } 124 if (dim == 1) { 125 if (bx == DMDA_BOUNDARY_PERIODIC) hx = (xmax-xmin)/M; 126 else hx = (xmax-xmin)/(M-1); 127 ierr = VecGetArray(xcoor,&coors);CHKERRQ(ierr); 128 for (i=0; i<isize; i++) { 129 coors[i] = xmin + hx*(i+istart); 130 } 131 ierr = VecRestoreArray(xcoor,&coors);CHKERRQ(ierr); 132 } else if (dim == 2) { 133 if (bx == DMDA_BOUNDARY_PERIODIC) hx = (xmax-xmin)/(M); 134 else hx = (xmax-xmin)/(M-1); 135 if (by == DMDA_BOUNDARY_PERIODIC) hy = (ymax-ymin)/(N); 136 else hy = (ymax-ymin)/(N-1); 137 ierr = VecGetArray(xcoor,&coors);CHKERRQ(ierr); 138 cnt = 0; 139 for (j=0; j<jsize; j++) { 140 for (i=0; i<isize; i++) { 141 coors[cnt++] = xmin + hx*(i+istart); 142 coors[cnt++] = ymin + hy*(j+jstart); 143 } 144 } 145 ierr = VecRestoreArray(xcoor,&coors);CHKERRQ(ierr); 146 } else if (dim == 3) { 147 if (bx == DMDA_BOUNDARY_PERIODIC) hx = (xmax-xmin)/(M); 148 else hx = (xmax-xmin)/(M-1); 149 if (by == DMDA_BOUNDARY_PERIODIC) hy = (ymax-ymin)/(N); 150 else hy = (ymax-ymin)/(N-1); 151 if (bz == DMDA_BOUNDARY_PERIODIC) hz_ = (zmax-zmin)/(P); 152 else hz_ = (zmax-zmin)/(P-1); 153 ierr = VecGetArray(xcoor,&coors);CHKERRQ(ierr); 154 cnt = 0; 155 for (k=0; k<ksize; k++) { 156 for (j=0; j<jsize; j++) { 157 for (i=0; i<isize; i++) { 158 coors[cnt++] = xmin + hx*(i+istart); 159 coors[cnt++] = ymin + hy*(j+jstart); 160 coors[cnt++] = zmin + hz_*(k+kstart); 161 } 162 } 163 } 164 ierr = VecRestoreArray(xcoor,&coors);CHKERRQ(ierr); 165 } else SETERRQ1(((PetscObject)da)->comm,PETSC_ERR_SUP,"Cannot create uniform coordinates for this dimension %D\n",dim); 166 ierr = DMSetCoordinates(da,xcoor);CHKERRQ(ierr); 167 ierr = PetscLogObjectParent(da,xcoor);CHKERRQ(ierr); 168 ierr = VecDestroy(&xcoor);CHKERRQ(ierr); 169 PetscFunctionReturn(0); 170 } 171 172 #undef __FUNCT__ 173 #define __FUNCT__ "DMDASelectFields" 174 PetscErrorCode DMDASelectFields(DM da,PetscInt *outfields,PetscInt **fields) 175 { 176 PetscErrorCode ierr; 177 PetscInt step,ndisplayfields,*displayfields,k,j; 178 PetscBool flg; 179 180 PetscFunctionBegin; 181 ierr = DMDAGetInfo(da,0,0,0,0,0,0,0,&step,0,0,0,0,0);CHKERRQ(ierr); 182 ierr = PetscMalloc(step*sizeof(PetscInt),&displayfields);CHKERRQ(ierr); 183 for (k=0; k<step; k++) displayfields[k] = k; 184 ndisplayfields = step; 185 ierr = PetscOptionsGetIntArray(PETSC_NULL,"-draw_fields",displayfields,&ndisplayfields,&flg);CHKERRQ(ierr); 186 if (!ndisplayfields) ndisplayfields = step; 187 if (!flg) { 188 char **fields; 189 const char *fieldname; 190 PetscInt nfields = step; 191 ierr = PetscMalloc(step*sizeof(char*),&fields);CHKERRQ(ierr); 192 ierr = PetscOptionsGetStringArray(PETSC_NULL,"-draw_fields_by_name",fields,&nfields,&flg);CHKERRQ(ierr); 193 if (flg) { 194 ndisplayfields = 0; 195 for (k=0; k<nfields;k++) { 196 for (j=0; j<step; j++) { 197 ierr = DMDAGetFieldName(da,j,&fieldname);CHKERRQ(ierr); 198 ierr = PetscStrcmp(fieldname,fields[k],&flg);CHKERRQ(ierr); 199 if (flg) { 200 goto found; 201 } 202 } 203 SETERRQ1(((PetscObject)da)->comm,PETSC_ERR_USER,"Unknown fieldname %s",fields[k]); 204 found: displayfields[ndisplayfields++] = j; 205 } 206 } 207 for (k=0; k<nfields; k++) { 208 ierr = PetscFree(fields[k]);CHKERRQ(ierr); 209 } 210 ierr = PetscFree(fields);CHKERRQ(ierr); 211 } 212 *fields = displayfields; 213 *outfields = ndisplayfields; 214 PetscFunctionReturn(0); 215 } 216 217 #undef __FUNCT__ 218 #define __FUNCT__ "VecView_MPI_Draw_DA1d" 219 PetscErrorCode VecView_MPI_Draw_DA1d(Vec xin,PetscViewer v) 220 { 221 DM da; 222 PetscErrorCode ierr; 223 PetscMPIInt rank,size,tag1,tag2; 224 PetscInt i,n,N,step,istart,isize,j,nbounds; 225 MPI_Status status; 226 PetscReal coors[4],ymin,ymax,min,max,xmin,xmax,tmp,xgtmp; 227 const PetscScalar *array,*xg; 228 PetscDraw draw; 229 PetscBool isnull,showpoints = PETSC_FALSE; 230 MPI_Comm comm; 231 PetscDrawAxis axis; 232 Vec xcoor; 233 DMDABoundaryType bx; 234 const PetscReal *bounds; 235 PetscInt *displayfields; 236 PetscInt k,ndisplayfields; 237 PetscBool hold; 238 239 PetscFunctionBegin; 240 ierr = PetscViewerDrawGetDraw(v,0,&draw);CHKERRQ(ierr); 241 ierr = PetscDrawIsNull(draw,&isnull);CHKERRQ(ierr); if (isnull) PetscFunctionReturn(0); 242 ierr = PetscViewerDrawGetBounds(v,&nbounds,&bounds);CHKERRQ(ierr); 243 244 ierr = VecGetDM(xin,&da);CHKERRQ(ierr); 245 if (!da) SETERRQ(((PetscObject)xin)->comm,PETSC_ERR_ARG_WRONG,"Vector not generated from a DMDA"); 246 247 ierr = PetscOptionsGetBool(PETSC_NULL,"-draw_vec_mark_points",&showpoints,PETSC_NULL);CHKERRQ(ierr); 248 249 ierr = DMDAGetInfo(da,0,&N,0,0,0,0,0,&step,0,&bx,0,0,0);CHKERRQ(ierr); 250 ierr = DMDAGetCorners(da,&istart,0,0,&isize,0,0);CHKERRQ(ierr); 251 ierr = VecGetArrayRead(xin,&array);CHKERRQ(ierr); 252 ierr = VecGetLocalSize(xin,&n);CHKERRQ(ierr); 253 n = n/step; 254 255 /* get coordinates of nodes */ 256 ierr = DMGetCoordinates(da,&xcoor);CHKERRQ(ierr); 257 if (!xcoor) { 258 ierr = DMDASetUniformCoordinates(da,0.0,1.0,0.0,0.0,0.0,0.0);CHKERRQ(ierr); 259 ierr = DMGetCoordinates(da,&xcoor);CHKERRQ(ierr); 260 } 261 ierr = VecGetArrayRead(xcoor,&xg);CHKERRQ(ierr); 262 263 ierr = PetscObjectGetComm((PetscObject)xin,&comm);CHKERRQ(ierr); 264 ierr = MPI_Comm_size(comm,&size);CHKERRQ(ierr); 265 ierr = MPI_Comm_rank(comm,&rank);CHKERRQ(ierr); 266 267 /* 268 Determine the min and max x coordinate in plot 269 */ 270 if (!rank) { 271 xmin = PetscRealPart(xg[0]); 272 } 273 if (rank == size-1) { 274 xmax = PetscRealPart(xg[n-1]); 275 } 276 ierr = MPI_Bcast(&xmin,1,MPIU_REAL,0,comm);CHKERRQ(ierr); 277 ierr = MPI_Bcast(&xmax,1,MPIU_REAL,size-1,comm);CHKERRQ(ierr); 278 279 ierr = DMDASelectFields(da,&ndisplayfields,&displayfields);CHKERRQ(ierr); 280 for (k=0; k<ndisplayfields; k++) { 281 j = displayfields[k]; 282 ierr = PetscViewerDrawGetDraw(v,k,&draw);CHKERRQ(ierr); 283 ierr = PetscDrawCheckResizedWindow(draw);CHKERRQ(ierr); 284 285 /* 286 Determine the min and max y coordinate in plot 287 */ 288 min = 1.e20; max = -1.e20; 289 for (i=0; i<n; i++) { 290 if (PetscRealPart(array[j+i*step]) < min) min = PetscRealPart(array[j+i*step]); 291 if (PetscRealPart(array[j+i*step]) > max) max = PetscRealPart(array[j+i*step]); 292 } 293 if (min + 1.e-10 > max) { 294 min -= 1.e-5; 295 max += 1.e-5; 296 } 297 if (j < nbounds) { 298 min = PetscMin(min,bounds[2*j]); 299 max = PetscMax(max,bounds[2*j+1]); 300 } 301 302 ierr = MPI_Reduce(&min,&ymin,1,MPIU_REAL,MPIU_MIN,0,comm);CHKERRQ(ierr); 303 ierr = MPI_Reduce(&max,&ymax,1,MPIU_REAL,MPIU_MAX,0,comm);CHKERRQ(ierr); 304 305 ierr = PetscViewerDrawGetHold(v,&hold);CHKERRQ(ierr); 306 if (!hold) { 307 ierr = PetscDrawSynchronizedClear(draw);CHKERRQ(ierr); 308 } 309 ierr = PetscViewerDrawGetDrawAxis(v,k,&axis);CHKERRQ(ierr); 310 ierr = PetscLogObjectParent(draw,axis);CHKERRQ(ierr); 311 if (!rank) { 312 const char *title; 313 314 ierr = PetscDrawAxisSetLimits(axis,xmin,xmax,ymin,ymax);CHKERRQ(ierr); 315 ierr = PetscDrawAxisDraw(axis);CHKERRQ(ierr); 316 ierr = PetscDrawGetCoordinates(draw,coors,coors+1,coors+2,coors+3);CHKERRQ(ierr); 317 ierr = DMDAGetFieldName(da,j,&title);CHKERRQ(ierr); 318 if (title) {ierr = PetscDrawSetTitle(draw,title);CHKERRQ(ierr);} 319 } 320 ierr = MPI_Bcast(coors,4,MPIU_REAL,0,comm);CHKERRQ(ierr); 321 if (rank) { 322 ierr = PetscDrawSetCoordinates(draw,coors[0],coors[1],coors[2],coors[3]);CHKERRQ(ierr); 323 } 324 325 /* draw local part of vector */ 326 ierr = PetscObjectGetNewTag((PetscObject)xin,&tag1);CHKERRQ(ierr); 327 ierr = PetscObjectGetNewTag((PetscObject)xin,&tag2);CHKERRQ(ierr); 328 if (rank < size-1) { /*send value to right */ 329 ierr = MPI_Send((void*)&array[j+(n-1)*step],1,MPIU_REAL,rank+1,tag1,comm);CHKERRQ(ierr); 330 ierr = MPI_Send((void*)&xg[n-1],1,MPIU_REAL,rank+1,tag1,comm);CHKERRQ(ierr); 331 } 332 if (!rank && bx == DMDA_BOUNDARY_PERIODIC && size > 1) { /* first processor sends first value to last */ 333 ierr = MPI_Send((void*)&array[j],1,MPIU_REAL,size-1,tag2,comm);CHKERRQ(ierr); 334 } 335 336 for (i=1; i<n; i++) { 337 ierr = PetscDrawLine(draw,PetscRealPart(xg[i-1]),PetscRealPart(array[j+step*(i-1)]),PetscRealPart(xg[i]),PetscRealPart(array[j+step*i]),PETSC_DRAW_RED);CHKERRQ(ierr); 338 if (showpoints) { 339 ierr = PetscDrawPoint(draw,PetscRealPart(xg[i-1]),PetscRealPart(array[j+step*(i-1)]),PETSC_DRAW_BLACK);CHKERRQ(ierr); 340 } 341 } 342 if (rank) { /* receive value from left */ 343 ierr = MPI_Recv(&tmp,1,MPIU_REAL,rank-1,tag1,comm,&status);CHKERRQ(ierr); 344 ierr = MPI_Recv(&xgtmp,1,MPIU_REAL,rank-1,tag1,comm,&status);CHKERRQ(ierr); 345 ierr = PetscDrawLine(draw,xgtmp,tmp,PetscRealPart(xg[0]),PetscRealPart(array[j]),PETSC_DRAW_RED);CHKERRQ(ierr); 346 if (showpoints) { 347 ierr = PetscDrawPoint(draw,xgtmp,tmp,PETSC_DRAW_BLACK);CHKERRQ(ierr); 348 } 349 } 350 if (rank == size-1 && bx == DMDA_BOUNDARY_PERIODIC && size > 1) { 351 ierr = MPI_Recv(&tmp,1,MPIU_REAL,0,tag2,comm,&status);CHKERRQ(ierr); 352 /* If the mesh is not uniform we do not know the mesh spacing between the last point on the right and the first ghost point */ 353 ierr = PetscDrawLine(draw,PetscRealPart(xg[n-1]),PetscRealPart(array[j+step*(n-1)]),PetscRealPart(xg[n-1]+(xg[n-1]-xg[n-2])),tmp,PETSC_DRAW_RED);CHKERRQ(ierr); 354 if (showpoints) { 355 ierr = PetscDrawPoint(draw,PetscRealPart(xg[n-2]),PetscRealPart(array[j+step*(n-1)]),PETSC_DRAW_BLACK);CHKERRQ(ierr); 356 } 357 } 358 ierr = PetscDrawSynchronizedFlush(draw);CHKERRQ(ierr); 359 ierr = PetscDrawPause(draw);CHKERRQ(ierr); 360 } 361 ierr = PetscFree(displayfields);CHKERRQ(ierr); 362 ierr = VecRestoreArrayRead(xcoor,&xg);CHKERRQ(ierr); 363 ierr = VecRestoreArrayRead(xin,&array);CHKERRQ(ierr); 364 PetscFunctionReturn(0); 365 } 366 367