Actual source code: swarmpic_da.c

  1: #include <petscdm.h>
  2: #include <petscdmda.h>
  3: #include <petsc/private/dmswarmimpl.h>
  4: #include "../src/dm/impls/swarm/data_bucket.h"

  6: static PetscErrorCode private_DMSwarmCreateCellLocalCoords_DA_Q1_Regular(PetscInt dim, PetscInt np[], PetscInt *_npoints, PetscReal **_xi)
  7: {
  8:   PetscReal *xi;
  9:   PetscInt   d, npoints = 0, cnt;
 10:   PetscReal  ds[] = {0.0, 0.0, 0.0};
 11:   PetscInt   ii, jj, kk;

 13:   PetscFunctionBegin;
 14:   switch (dim) {
 15:   case 1:
 16:     npoints = np[0];
 17:     break;
 18:   case 2:
 19:     npoints = np[0] * np[1];
 20:     break;
 21:   case 3:
 22:     npoints = np[0] * np[1] * np[2];
 23:     break;
 24:   }
 25:   for (d = 0; d < dim; d++) ds[d] = 2.0 / ((PetscReal)np[d]);

 27:   PetscCall(PetscMalloc1(dim * npoints, &xi));
 28:   switch (dim) {
 29:   case 1:
 30:     cnt = 0;
 31:     for (ii = 0; ii < np[0]; ii++) {
 32:       xi[dim * cnt + 0] = -1.0 + 0.5 * ds[d] + ii * ds[0];
 33:       cnt++;
 34:     }
 35:     break;

 37:   case 2:
 38:     cnt = 0;
 39:     for (jj = 0; jj < np[1]; jj++) {
 40:       for (ii = 0; ii < np[0]; ii++) {
 41:         xi[dim * cnt + 0] = -1.0 + 0.5 * ds[0] + ii * ds[0];
 42:         xi[dim * cnt + 1] = -1.0 + 0.5 * ds[1] + jj * ds[1];
 43:         cnt++;
 44:       }
 45:     }
 46:     break;

 48:   case 3:
 49:     cnt = 0;
 50:     for (kk = 0; kk < np[2]; kk++) {
 51:       for (jj = 0; jj < np[1]; jj++) {
 52:         for (ii = 0; ii < np[0]; ii++) {
 53:           xi[dim * cnt + 0] = -1.0 + 0.5 * ds[0] + ii * ds[0];
 54:           xi[dim * cnt + 1] = -1.0 + 0.5 * ds[1] + jj * ds[1];
 55:           xi[dim * cnt + 2] = -1.0 + 0.5 * ds[2] + kk * ds[2];
 56:           cnt++;
 57:         }
 58:       }
 59:     }
 60:     break;
 61:   }
 62:   *_npoints = npoints;
 63:   *_xi      = xi;
 64:   PetscFunctionReturn(PETSC_SUCCESS);
 65: }

 67: static PetscErrorCode private_DMSwarmCreateCellLocalCoords_DA_Q1_Gauss(PetscInt dim, PetscInt np_1d, PetscInt *_npoints, PetscReal **_xi)
 68: {
 69:   PetscQuadrature  quadrature;
 70:   const PetscReal *quadrature_xi;
 71:   PetscReal       *xi;
 72:   PetscInt         d, q, npoints_q;

 74:   PetscFunctionBegin;
 75:   PetscCall(PetscDTGaussTensorQuadrature(dim, 1, np_1d, -1.0, 1.0, &quadrature));
 76:   PetscCall(PetscQuadratureGetData(quadrature, NULL, NULL, &npoints_q, &quadrature_xi, NULL));
 77:   PetscCall(PetscMalloc1(dim * npoints_q, &xi));
 78:   for (q = 0; q < npoints_q; q++) {
 79:     for (d = 0; d < dim; d++) xi[dim * q + d] = quadrature_xi[dim * q + d];
 80:   }
 81:   PetscCall(PetscQuadratureDestroy(&quadrature));
 82:   *_npoints = npoints_q;
 83:   *_xi      = xi;
 84:   PetscFunctionReturn(PETSC_SUCCESS);
 85: }

 87: static PetscErrorCode private_DMSwarmInsertPointsUsingCellDM_DA_Q1(DM dm, DM dmc, PetscInt npoints, DMSwarmPICLayoutType layout)
 88: {
 89:   PetscInt           dim, npoints_q;
 90:   PetscInt           nel, npe, e, q, k, d;
 91:   const PetscInt    *element_list;
 92:   PetscReal        **basis;
 93:   PetscReal         *xi;
 94:   Vec                coor;
 95:   const PetscScalar *_coor;
 96:   PetscReal         *elcoor;
 97:   PetscReal         *swarm_coor;
 98:   PetscInt          *swarm_cellid;
 99:   PetscInt           pcnt;

101:   PetscFunctionBegin;
102:   PetscCall(DMGetDimension(dm, &dim));
103:   switch (layout) {
104:   case DMSWARMPIC_LAYOUT_REGULAR: {
105:     PetscInt np_dir[3];
106:     np_dir[0] = np_dir[1] = np_dir[2] = npoints;
107:     PetscCall(private_DMSwarmCreateCellLocalCoords_DA_Q1_Regular(dim, np_dir, &npoints_q, &xi));
108:   } break;
109:   case DMSWARMPIC_LAYOUT_GAUSS:
110:     PetscCall(private_DMSwarmCreateCellLocalCoords_DA_Q1_Gauss(dim, npoints, &npoints_q, &xi));
111:     break;

113:   case DMSWARMPIC_LAYOUT_SUBDIVISION: {
114:     PetscInt s, nsub;
115:     PetscInt np_dir[3];
116:     nsub      = npoints;
117:     np_dir[0] = 1;
118:     for (s = 0; s < nsub; s++) np_dir[0] *= 2;
119:     np_dir[1] = np_dir[0];
120:     np_dir[2] = np_dir[0];
121:     PetscCall(private_DMSwarmCreateCellLocalCoords_DA_Q1_Regular(dim, np_dir, &npoints_q, &xi));
122:   } break;
123:   default:
124:     SETERRQ(PetscObjectComm((PetscObject)dm), PETSC_ERR_SUP, "A valid DMSwarmPIC layout must be provided");
125:   }

127:   PetscCall(DMDAGetElements(dmc, &nel, &npe, &element_list));
128:   PetscCall(PetscMalloc1(dim * npe, &elcoor));
129:   PetscCall(PetscMalloc1(npoints_q, &basis));
130:   for (q = 0; q < npoints_q; q++) {
131:     PetscCall(PetscMalloc1(npe, &basis[q]));

133:     switch (dim) {
134:     case 1:
135:       basis[q][0] = 0.5 * (1.0 - xi[dim * q + 0]);
136:       basis[q][1] = 0.5 * (1.0 + xi[dim * q + 0]);
137:       break;
138:     case 2:
139:       basis[q][0] = 0.25 * (1.0 - xi[dim * q + 0]) * (1.0 - xi[dim * q + 1]);
140:       basis[q][1] = 0.25 * (1.0 + xi[dim * q + 0]) * (1.0 - xi[dim * q + 1]);
141:       basis[q][2] = 0.25 * (1.0 + xi[dim * q + 0]) * (1.0 + xi[dim * q + 1]);
142:       basis[q][3] = 0.25 * (1.0 - xi[dim * q + 0]) * (1.0 + xi[dim * q + 1]);
143:       break;

145:     case 3:
146:       basis[q][0] = 0.125 * (1.0 - xi[dim * q + 0]) * (1.0 - xi[dim * q + 1]) * (1.0 - xi[dim * q + 2]);
147:       basis[q][1] = 0.125 * (1.0 + xi[dim * q + 0]) * (1.0 - xi[dim * q + 1]) * (1.0 - xi[dim * q + 2]);
148:       basis[q][2] = 0.125 * (1.0 + xi[dim * q + 0]) * (1.0 + xi[dim * q + 1]) * (1.0 - xi[dim * q + 2]);
149:       basis[q][3] = 0.125 * (1.0 - xi[dim * q + 0]) * (1.0 + xi[dim * q + 1]) * (1.0 - xi[dim * q + 2]);
150:       basis[q][4] = 0.125 * (1.0 - xi[dim * q + 0]) * (1.0 - xi[dim * q + 1]) * (1.0 + xi[dim * q + 2]);
151:       basis[q][5] = 0.125 * (1.0 + xi[dim * q + 0]) * (1.0 - xi[dim * q + 1]) * (1.0 + xi[dim * q + 2]);
152:       basis[q][6] = 0.125 * (1.0 + xi[dim * q + 0]) * (1.0 + xi[dim * q + 1]) * (1.0 + xi[dim * q + 2]);
153:       basis[q][7] = 0.125 * (1.0 - xi[dim * q + 0]) * (1.0 + xi[dim * q + 1]) * (1.0 + xi[dim * q + 2]);
154:       break;
155:     }
156:   }

158:   PetscCall(DMSwarmSetLocalSizes(dm, npoints_q * nel, -1));
159:   PetscCall(DMSwarmGetField(dm, DMSwarmPICField_coor, NULL, NULL, (void **)&swarm_coor));
160:   PetscCall(DMSwarmGetField(dm, DMSwarmPICField_cellid, NULL, NULL, (void **)&swarm_cellid));

162:   PetscCall(DMGetCoordinatesLocal(dmc, &coor));
163:   PetscCall(VecGetArrayRead(coor, &_coor));
164:   pcnt = 0;
165:   for (e = 0; e < nel; e++) {
166:     const PetscInt *element = &element_list[npe * e];

168:     for (k = 0; k < npe; k++) {
169:       for (d = 0; d < dim; d++) elcoor[dim * k + d] = PetscRealPart(_coor[dim * element[k] + d]);
170:     }

172:     for (q = 0; q < npoints_q; q++) {
173:       for (d = 0; d < dim; d++) swarm_coor[dim * pcnt + d] = 0.0;
174:       for (k = 0; k < npe; k++) {
175:         for (d = 0; d < dim; d++) swarm_coor[dim * pcnt + d] += basis[q][k] * elcoor[dim * k + d];
176:       }
177:       swarm_cellid[pcnt] = e;
178:       pcnt++;
179:     }
180:   }
181:   PetscCall(VecRestoreArrayRead(coor, &_coor));
182:   PetscCall(DMSwarmRestoreField(dm, DMSwarmPICField_cellid, NULL, NULL, (void **)&swarm_cellid));
183:   PetscCall(DMSwarmRestoreField(dm, DMSwarmPICField_coor, NULL, NULL, (void **)&swarm_coor));
184:   PetscCall(DMDARestoreElements(dmc, &nel, &npe, &element_list));

186:   PetscCall(PetscFree(xi));
187:   PetscCall(PetscFree(elcoor));
188:   for (q = 0; q < npoints_q; q++) PetscCall(PetscFree(basis[q]));
189:   PetscCall(PetscFree(basis));
190:   PetscFunctionReturn(PETSC_SUCCESS);
191: }

193: PetscErrorCode private_DMSwarmInsertPointsUsingCellDM_DA(DM dm, DM celldm, DMSwarmPICLayoutType layout, PetscInt layout_param)
194: {
195:   DMDAElementType etype;
196:   PetscInt        dim;

198:   PetscFunctionBegin;
199:   PetscCall(DMDAGetElementType(celldm, &etype));
200:   PetscCall(DMGetDimension(celldm, &dim));
201:   switch (etype) {
202:   case DMDA_ELEMENT_P1:
203:     SETERRQ(PetscObjectComm((PetscObject)dm), PETSC_ERR_SUP, "DA support is not currently available for DMDA_ELEMENT_P1");
204:   case DMDA_ELEMENT_Q1:
205:     PetscCheck(dim != 1, PetscObjectComm((PetscObject)dm), PETSC_ERR_SUP, "Support only available for dim = 2, 3");
206:     PetscCall(private_DMSwarmInsertPointsUsingCellDM_DA_Q1(dm, celldm, layout_param, layout));
207:     break;
208:   }
209:   PetscFunctionReturn(PETSC_SUCCESS);
210: }