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multigrid.cpp
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//----------------------------------------------------------------------------------||
//------------------- multigrid.cpp -------------------||
//----------------------------------------------------------------------------------||
// ||
// __ ___ _ _ ____ ____ ___ ____ ||
// \ \ / / \ | \ | | _ \ | _ \_ _/ ___| ||
// \ \ /\ / / _ \ | \| | | | |_____| |_) | | | ||
// \ V V / ___ \| |\ | |_| |_____| __/| | |___ ||
// \_/\_/_/ \_\_| \_|____/ |_| |___\____| ||
// ||
//----------------------------------------------------------------------------------||
//-- (W)akefield (A)cceleration a(n)d (D)LA - (P)article (i)n (C)ell Simulation --||
//----------------------------------------------------------------------------------||
//---Author----------- : Tianhong Wang --------------------||
//---Starting--------- : Feb-07-2019 --------------------||
//---Email------------ : [email protected] --------------------||
//---Group------------ : Dr. Gennady Shvets' Group --------------------||
//---Copyright-------- : (C) 2019 by Tianhong Wang --------------------||
//----------------------------------------------------------------------------------||
//----------------------------------------------------------------------------------||
#include "wand_PIC.h"
// Initiate at the beginning of the simulation
// Define the rule of Restriction and Prolongation
// Define the way of Restriction and Prolongation
// Define the 2D Cell Used for Multigrid Relaxation
//=======Multigrid Cell Class
MG_Cell::MG_Cell()
{
field = source = Residu = savefield = Chi = 0.0;
C_field = C_source = C_Residu = C_savefield = C_Chi = 0.0;
p_Res_cc = p_Res_xm = p_Res_xp = p_Res_ym = p_Res_yp = NULL;
p_Res_mm = p_Res_mp = p_Res_pm = p_Res_pp = NULL;
p_Pro_xm = p_Pro_xp = p_Pro_ym = p_Pro_yp = NULL;
Protype = 0;
};
MultiGrid::MultiGrid(int rank, int XGridN, int YGridN, FILE *f):NList("MultiGrid")
{
p_MGBCell = p_MGCell = NULL;
BottomSend = Bottomdisp = NULL;
recebottomX = recebottomY = NULL;
p_Meshs = p_domain()->p_Mesh();
AddEntry((char*)"OrderDown", &u1, 3);
AddEntry((char*)"OrderUp", &u2, 3);
AddEntry((char*)"RelaxMethod", &RelaxType, 0);
AddEntry((char*)"BottomMethod", &BottomType, 0);
AddEntry((char*)"SOR_Omega", &omega, 1.5);
AddEntry((char*)"ErrorLimit", &EpsLim, 1e-6);
BottomType=0; //May-25-2021; Tianhong.
if (f)
{
rewind(f);
read(f);
}
Rank = rank;
int i,j,n;
// Partition;
int RankIdx_X = p_domain()->p_Partition()->RankIdx_X();
int RankIdx_Y = p_domain()->p_Partition()->RankIdx_Y();
Xpa = p_domain()->p_Partition()->GetXpart();
Ypa = p_domain()->p_Partition()->GetYpart();
GridXY = XGridN*YGridN*Xpa*Ypa;
// initialize
for (i=0; i<Layer_buf; i++)
{
LayerGridX[i] = 0;
LayerGridY[i] = 0;
}
// Layer index starts from 1;
LayerGridX[1] = XGridN;
LayerGridY[1] = YGridN;
// ---------------------------------------------------------
// Define the Restriction rule and layers in X direction
// by a very simple and stupid way: walking and jumping.
// ---------------------------------------------------------
// ---------------------------------------------------------
// define layer and grid number at each layer//
// ---------------------------------------------------------
//May-25-2021- Tianhong updates;
std::vector< std::vector< std::pair<WDOUBLE,int> > > Dx;
std::vector< std::pair<WDOUBLE,int> > tmp;
for(i=0;i<p_Meshs->GridsTmp.size();i++)
{
tmp.push_back({p_Meshs->GridsTmp[i],i}); // cell size and grand index
}
Dx.push_back(tmp);
int gridmin=2;
MPI_Layer = 1;
n=1;
while(gridmin>1)
{
tmp.clear();
tmp.push_back({0.0,0}); //left ghost
MPI_Layer++;
n++;
for(int i=1;i<Dx[n-2].size()-1;i+=2)
{
WDOUBLE nextsize=Dx[n-2][i].first+(Dx[n-2][i-1].first+Dx[n-2][i+1].first)*0.5;
tmp.push_back( {nextsize, Dx[n-2][i].second} );
if(Dx[n-2][i].second >= ((RankIdx_X-1)*XGridN+1) && Dx[n-2][i].second<= (RankIdx_X)*XGridN )
{
LayerGridX[MPI_Layer] += 1;
}
if(Dx[n-2][i].second >= ((RankIdx_Y-1)*YGridN+1) && Dx[n-2][i].second <= (RankIdx_Y)*YGridN )
{
LayerGridY[MPI_Layer] += 1;
}
}
tmp[0].first=tmp[1].first;
tmp.push_back( { tmp[tmp.size()-1].first, p_Meshs->GridsTmp.size()-1} ); //right ghost
Dx.push_back(tmp);
int minGrid=std::min(LayerGridY[MPI_Layer],LayerGridX[MPI_Layer]);
MPI_Allreduce(&minGrid, &gridmin, 1, MPI_INT, MPI_MIN, MPI_COMM_WORLD);
}
// //=====
// if(Rank==0)
// {FILE * dFile;
// char name[128];
// sprintf(name,"AllLayers_%d_.dg",Rank);
// dFile = fopen (name,"w");
// for (n=1; n<=MPI_Layer; n++)
// {
// for (j=0; j<Dx[n-1].size(); j++)
// {
// fprintf(dFile, "[%d] ", Dx[n-1][j].second);
// }
// fprintf(dFile, "\n");
// }
// //====
// fclose (dFile);
// }
int Tot_GridX = 0;
int Tot_GridY = 0;
Layer_Sum[1] =0;
for (i=1; i<=MPI_Layer; i++) //layer starts with 1
{
Tot_GridX += LayerGridX[i]+2;
Tot_GridY += LayerGridX[i]+2;
if(i>1)
{
// Find the 2D Cells Sum of all Layers above this Layer
Layer_Sum[i] = Layer_Sum[i-1]+(LayerGridX[i-1]+2)*(LayerGridY[i-1]+2);
}
}
// ----------------------------------------------------------------
// Find the Cell Grand_Index in X(or Y) direction at each layer
// ----------------------------------------------------------------
std::vector< std::vector<int> > Cellidx_i(MPI_Layer,std::vector<int>() );
std::vector< std::vector<int> > Cellidx_j(MPI_Layer,std::vector<int>() );
std::vector< std::vector<WDOUBLE> > Celldx(MPI_Layer,std::vector<WDOUBLE>() );
std::vector< std::vector<WDOUBLE> > Celldy(MPI_Layer,std::vector<WDOUBLE>() );
for (n=1; n<=MPI_Layer; n++)
{
int iflag=0;
int jflag=0;
for(i=0;i<Dx[n-1].size();i++)
{
WDOUBLE ddx = Dx[n-1][i].first;
int idx = Dx[n-1][i].second;
//x-dir
if(idx >= ((RankIdx_X-1)*XGridN+1) && idx<= (RankIdx_X)*XGridN )
{
if(iflag==0)
{
Celldx[n-1].push_back(Dx[n-1][i-1].first);
Cellidx_i[n-1].push_back(Dx[n-1][i-1].second);
iflag=1;
}
Celldx[n-1].push_back(ddx);
Cellidx_i[n-1].push_back(idx);
}
else if(iflag)
{ iflag=0;
Celldx[n-1].push_back(ddx);
Cellidx_i[n-1].push_back(idx);
}
//y-dir
if(idx >= ((RankIdx_Y-1)*YGridN+1) && idx<= (RankIdx_Y)*YGridN )
{
if(jflag==0)
{
Celldy[n-1].push_back(Dx[n-1][i-1].first);
Cellidx_j[n-1].push_back(Dx[n-1][i-1].second);
jflag=1;
}
Celldy[n-1].push_back(ddx);
Cellidx_j[n-1].push_back(idx);
}
else if(jflag)
{
jflag=0;
Celldy[n-1].push_back(ddx);
Cellidx_j[n-1].push_back(idx);
}
}
}
// ----------------------------------------------------------------
// Creat All 2D Cells at All Layers
// ----------------------------------------------------------------
int Tot_MGCell = 0;
for (n=1; n<=MPI_Layer; n++)
{
Tot_MGCell += (LayerGridX[n]+2)*(LayerGridY[n]+2);
}
p_MGCell = new MG_Cell[Tot_MGCell];
for (n=1; n<=MPI_Layer; n++)
{
for (j=0; j<=LayerGridY[n]+1; j++)
{
for (i=0; i<=LayerGridX[n]+1; i++)
{
MG_Cell &mgc = GetMGCell(i,j,n);
mgc.Grandidx_X = Cellidx_i[n-1][i];
mgc.Grandidx_Y = Cellidx_j[n-1][j];
mgc.dx = Celldx[n-1][i];
mgc.dy = Celldy[n-1][j];
}
}
}
// //=====
// FILE * dFile;
// char name[128];
// sprintf(name,"MultiGrids_%d_.dg",Rank);
// dFile = fopen (name,"w");
// for (n=1; n<=MPI_Layer; n++)
// {
// for (j=0; j<=LayerGridY[n]+1; j++)
// {
// MG_Cell &mgc = GetMGCell(0,j,n);
// fprintf(dFile, "[%f] ", mgc.dy);
// }
// fprintf(dFile, "\n");
// }
// //====
// fclose (dFile);
// ----------------------------------------------------------------
// Relate Cells at different layers
// Find restriction rules and prolongation rules
// ----------------------------------------------------------------
int ii, jj;
// Restriction starts at the second layer//
for (n=2; n<=MPI_Layer;n++)
{
for (j=1; j<=LayerGridY[n]; j++)
{
for (i=1; i<=LayerGridX[n]; i++)
{
MG_Cell &mgc = GetMGCell(i,j,n);
ii = 1;
jj = 1;
while (Cellidx_i[n-2][ii]<Cellidx_i[n-1][i])
{ ii++; }
while (Cellidx_j[n-2][jj]<Cellidx_j[n-1][j])
{ jj++; }
mgc.p_Res_cc = &GetMGCell(ii, jj,n-1);
mgc.p_Res_xm = &GetMGCell(ii-1,jj,n-1);
mgc.p_Res_xp = &GetMGCell(ii+1,jj,n-1);
mgc.p_Res_ym = &GetMGCell(ii,jj-1,n-1);
mgc.p_Res_yp = &GetMGCell(ii,jj+1,n-1);
mgc.p_Res_mm = &GetMGCell(ii-1,jj-1,n-1);
mgc.p_Res_mp = &GetMGCell(ii-1,jj+1,n-1);
mgc.p_Res_pm = &GetMGCell(ii+1,jj-1,n-1);
mgc.p_Res_pp = &GetMGCell(ii+1,jj+1,n-1);
}
}
}
// Prolongation starts at the layer above last layer//
int findx;
int findy;
for (n=1; n<MPI_Layer;n++)
{
for (j=1; j<=LayerGridY[n]; j++)
{
for (i=1; i<=LayerGridX[n]; i++)
{
MG_Cell &mgc = GetMGCell(i,j,n);
findx = 0; findy = 0;
for (ii = 0; ii<=LayerGridX[n+1]+1; ii++)
{
if(Cellidx_i[n][ii]==Cellidx_i[n-1][i])
{
findx = 1;
break;
}
if(Cellidx_i[n][ii]<Cellidx_i[n-1][i]&&Cellidx_i[n][ii+1]>Cellidx_i[n-1][i])
{
break;
}
}
for (jj = 0; jj<=LayerGridY[n+1]+1; jj++)
{
if(Cellidx_j[n][jj]==Cellidx_j[n-1][j])
{
findy = 1;
break;
}
if(Cellidx_j[n][jj]<Cellidx_j[n-1][j]&&Cellidx_j[n][jj+1]>Cellidx_j[n-1][j])
{
break;
}
}
//type 0 prolongation
if(findx==1 &&findy == 1)
{
mgc.Protype = 0;
mgc.p_Pro_xm = &GetMGCell(ii,jj,n+1);
}
//type 1 prolongation
if(findx==0 &&findy == 1)
{
mgc.Protype = 1;
mgc.p_Pro_xm = &GetMGCell(ii, jj,n+1);
mgc.p_Pro_xp = &GetMGCell(ii+1,jj,n+1);
}
//type 2 prolongation
if(findx==1 &&findy == 0)
{
mgc.Protype = 2;
mgc.p_Pro_ym = &GetMGCell(ii, jj,n+1);
mgc.p_Pro_yp = &GetMGCell(ii,jj+1,n+1);
}
//type 3 prolongation
if(findx==0 &&findy == 0)
{
mgc.Protype = 3;
mgc.p_Pro_xm = &GetMGCell(ii, jj,n+1);
mgc.p_Pro_xp = &GetMGCell(ii+1, jj,n+1);
mgc.p_Pro_ym = &GetMGCell(ii, jj+1,n+1);
mgc.p_Pro_yp = &GetMGCell(ii+1,jj+1,n+1);
}
}
}
}
// ----------------------------------------------------------------
// Layers Below the bottom Layer
// ----------------------------------------------------------------
// ----------------------------------------------------------------
// Layers Below the bottom Layer
// ----------------------------------------------------------------
// ----------------------------------------------------------------
// Layers Below the bottom Layer
// ----------------------------------------------------------------
// ----------------------------------------------------------------
// Layers Below the bottom Layer
// ----------------------------------------------------------------
// collect botton grid number at each processor;
SER_Layer = 0;
Worker = floor(Ypa*Xpa/2-1);
int sendx = LayerGridX[MPI_Layer]; //1d grid at bottom layer at different rank
int sendy = LayerGridY[MPI_Layer];
recebottomX = new int[Xpa*Ypa];
recebottomY = new int[Xpa*Ypa];
MPI_Gather(&sendx, 1, MPI_INT, recebottomX, 1, MPI_INT, Worker, MPI_COMM_WORLD);
MPI_Gather(&sendy, 1, MPI_INT, recebottomY, 1, MPI_INT, Worker, MPI_COMM_WORLD);
/* removed by Tianhong; May-25
// MPI_GatherV receive displacement for each sending processor;
if(Rank == Worker)
{
Bottomdisp = new int[Xpa*Ypa];
BottomSend = new int[Xpa*Ypa];
Bottomdisp[0] = 0;
for(i=1; i<Xpa*Ypa; i++)
{
Bottomdisp[i] = Bottomdisp[i-1] + recebottomX[i-1]*recebottomY[i-1];
}
//total cells at the bottom layer without the bound cells.
BottomCells = Bottomdisp[Xpa*Ypa-1]+recebottomX[Xpa*Ypa-1]*recebottomY[Xpa*Ypa-1];
for(i=0; i<Xpa*Ypa; i++)
{
BottomSend[i] = recebottomX[i]*recebottomY[i];
}
int BottomGrid = 0;
for(i=0; i<Xpa; i++)
{
BottomGrid+= recebottomX[i];
}
switch(BottomType)
{
//====================multigrid===========
case 1:
n = BottomGrid;
SER_Layer = 1;
BLayerGrid[SER_Layer] = BottomGrid;
while (n>2)
{
SER_Layer++;
n = ceil(n*0.5);
BLayerGrid[SER_Layer] = n;
}
// tot grid(1d) at bottom layers alltogether
int Tot_Grid = 0;
for (n=1; n<=SER_Layer; n++)
{
Tot_Grid += BLayerGrid[n];
}
Tot_Grid += SER_Layer*2;
int BCellidx_i[Tot_Grid];
n = 0;
for (j = 1; j<=SER_Layer; j++)
{
for (i = 0; i<=BLayerGrid[j]+1; i++)
{
BCellidx_i[n] = (i-1)*pow(2,j-1)+1;
n++;
}
}
BLayer_Sum[1] =0;
for (i=2; i<SER_Layer+1; i++)
{
BLayer_Sum[i] =BLayer_Sum[i-1]+(BLayerGrid[i-1]+2)*(BLayerGrid[i-1]+2);
}
int BLayerSum1d[SER_Layer+1];
BLayerSum1d[1] =0;
for (i=2; i<SER_Layer+1; i++)
{
BLayerSum1d[i] =BLayerSum1d[i-1]+(BLayerGrid[i-1]+2);
}
Tot_MGCell = 0;
for (i=1; i<SER_Layer+1; i++)
{
Tot_MGCell += (BLayerGrid[i]+2)*(BLayerGrid[i]+2);
}
p_MGBCell = new MG_Cell[Tot_MGCell];
for (n=1; n<=SER_Layer;n++)
{
for (j=0; j<=BLayerGrid[n]+1; j++)
{
for (i=0; i<=BLayerGrid[n]+1; i++)
{
MG_Cell &mgc = GetMGBCell(i,j,n);
mgc.Grandidx_X = BCellidx_i[BLayerSum1d[n]+i];
mgc.Grandidx_Y = BCellidx_i[BLayerSum1d[n]+j];
}
}
}
// ----------------------------------------------------------------
// Relate Cells at different layers
// Find restriction rules and prolongation rules
// ----------------------------------------------------------------
// Restriction starts at the second layer//
for (n=2; n<=SER_Layer;n++)
{
for (j=1; j<=BLayerGrid[n]; j++)
{
for (i=1; i<=BLayerGrid[n]; i++)
{
MG_Cell &mgc = GetMGBCell(i,j,n);
ii = 1;
jj = 1;
while (BCellidx_i[BLayerSum1d[n-1]+ii]<BCellidx_i[BLayerSum1d[n]+i])
{ ii++; }
while (BCellidx_i[BLayerSum1d[n-1]+jj]<BCellidx_i[BLayerSum1d[n]+j])
{ jj++; }
mgc.p_Res_cc = &GetMGBCell(ii, jj,n-1);
mgc.p_Res_xm = &GetMGBCell(ii-1,jj,n-1);
mgc.p_Res_xp = &GetMGBCell(ii+1,jj,n-1);
mgc.p_Res_ym = &GetMGBCell(ii,jj-1,n-1);
mgc.p_Res_yp = &GetMGBCell(ii,jj+1,n-1);
mgc.p_Res_mm = &GetMGBCell(ii-1,jj-1,n-1);
mgc.p_Res_mp = &GetMGBCell(ii-1,jj+1,n-1);
mgc.p_Res_pm = &GetMGBCell(ii+1,jj-1,n-1);
mgc.p_Res_pp = &GetMGBCell(ii+1,jj+1,n-1);
}
}
}
// Prolongation starts at the layer above last layer//
for (n=1; n<SER_Layer;n++)
{
for (j=1; j<=BLayerGrid[n]; j++)
{
for (i=1; i<=BLayerGrid[n]; i++)
{
MG_Cell &mgc = GetMGBCell(i,j,n);
findx = 0; findy = 0;
for (ii = 0; ii<=BLayerGrid[n+1]+1; ii++)
{
if(BCellidx_i[BLayerSum1d[n+1]+ii]==BCellidx_i[BLayerSum1d[n]+i])
{
findx = 1;
break;
}
if(BCellidx_i[BLayerSum1d[n+1]+ii]<BCellidx_i[BLayerSum1d[n]+i]&
BCellidx_i[BLayerSum1d[n+1]+ii+1]>BCellidx_i[BLayerSum1d[n]+i])
{
break;
}
}
for (jj = 0; jj<=BLayerGrid[n+1]+1; jj++)
{
if(BCellidx_i[BLayerSum1d[n+1]+jj]==BCellidx_i[BLayerSum1d[n]+j])
{
findy = 1;
break;
}
if(BCellidx_i[BLayerSum1d[n+1]+jj]<BCellidx_i[BLayerSum1d[n]+j]&
BCellidx_i[BLayerSum1d[n+1]+jj+1]>BCellidx_i[BLayerSum1d[n]+j])
{
break;
}
}
//type 0 prolongation
if(findx==1 &findy == 1)
{
mgc.Protype = 0;
mgc.p_Pro_xm = &GetMGBCell(ii,jj,n+1);
}
//type 1 prolongation
if(findx==0 &findy == 1)
{
mgc.Protype = 1;
mgc.p_Pro_xm = &GetMGBCell(ii, jj,n+1);
mgc.p_Pro_xp = &GetMGBCell(ii+1,jj,n+1);
}
//type 2 prolongation
if(findx==1 &findy == 0)
{
mgc.Protype = 2;
mgc.p_Pro_ym = &GetMGBCell(ii, jj,n+1);
mgc.p_Pro_yp = &GetMGBCell(ii,jj+1,n+1);
}
//type 3 prolongation
if(findx==0 &findy == 0)
{
mgc.Protype = 3;
mgc.p_Pro_xm = &GetMGBCell(ii, jj,n+1);
mgc.p_Pro_xp = &GetMGBCell(ii+1, jj,n+1);
mgc.p_Pro_ym = &GetMGBCell(ii, jj+1,n+1);
mgc.p_Pro_yp = &GetMGBCell(ii+1,jj+1,n+1);
}
}
}
}
//====================multigrid===========
break;
}
}
*/
//==== end worker rank=====//
for (i=1; i<=MPI_Layer+SER_Layer; i++)
{
MeshAmplif[i] = pow(2,i-1)*pow(2,i-1);
}
if (Rank==0) std::cout << "==== Multigrid: Multigrid Meshes Done. ====\n";
};
// Full Weight Restriction
void MultiGrid::Restriction(int send, int rece, int tolayer, int where) //v
{
int i,j;
WDOUBLE wmm, wxm, wmp;
WDOUBLE wym, wcc, wyp;
WDOUBLE wpm, wxp, wpp;
WDOUBLE wa;
switch(where)
{
case 0:
for(j=1; j<=LayerGridY[tolayer]; j++)
{
for(i=1; i<=LayerGridX[tolayer]; i++)
{
MG_Cell &mgc = GetMGCell(i,j,tolayer);
wmm=mgc.p_Res_mm->dx*mgc.p_Res_mm->dy/4;
wxm=mgc.p_Res_xm->dx*mgc.p_Res_xm->dy/2;
wmp=mgc.p_Res_mp->dx*mgc.p_Res_mp->dy/4;
wym=mgc.p_Res_ym->dx*mgc.p_Res_ym->dy/2;
wcc=mgc.p_Res_cc->dx*mgc.p_Res_cc->dy;
wyp=mgc.p_Res_yp->dx*mgc.p_Res_yp->dy/2;
wpm=mgc.p_Res_pm->dx*mgc.p_Res_pm->dy/4;
wxp=mgc.p_Res_xp->dx*mgc.p_Res_xp->dy/2;
wpp=mgc.p_Res_pp->dx*mgc.p_Res_pp->dy/4;
wa=wmm+wxm+wmp + wym+wcc+wyp + wpm+wxp+wpp;
mgc.M_value[rece] = (
mgc.p_Res_mm->M_value[send]*wmm + mgc.p_Res_xm->M_value[send]*wxm + mgc.p_Res_mp->M_value[send]*wmp
+ mgc.p_Res_ym->M_value[send]*wym + mgc.p_Res_cc->M_value[send]*wcc + mgc.p_Res_yp->M_value[send]*wyp
+ mgc.p_Res_pm->M_value[send]*wpm + mgc.p_Res_xp->M_value[send]*wxp + mgc.p_Res_pp->M_value[send]*wpp
)/wa;
}
}
break;
case 1:
/*
for(j=1; j<=BLayerGrid[tolayer]; j++)
{
for(i=1; i<=BLayerGrid[tolayer]; i++)
{
MG_Cell &mgc = GetMGBCell(i,j,tolayer);
mgc.M_value[rece] = (mgc.p_Res_cc)->M_value[send]*0.25
+((mgc.p_Res_xm)->M_value[send]+(mgc.p_Res_xp)->M_value[send]
+(mgc.p_Res_ym)->M_value[send]+(mgc.p_Res_yp)->M_value[send])*0.125
+((mgc.p_Res_mm)->M_value[send]+(mgc.p_Res_mp)->M_value[send]
+(mgc.p_Res_pm)->M_value[send]+(mgc.p_Res_pp)->M_value[send])*0.0625;
}
}
*/
break;
}
return;
}
void MultiGrid::RestrictionB(int send, int rece, int tolayer, int where)//?
{
int i,j;
switch(where)
{
case 0:
for(j=1; j<=LayerGridY[tolayer]; j++)
{
for(i=1; i<=LayerGridX[tolayer]; i++)
{
MG_Cell &mgc = GetMGCell(i,j,tolayer);
mgc.M_value[rece] = (mgc.p_Res_cc)->M_value[send];
}
}
break;
case 1:
for(j=1; j<=BLayerGrid[tolayer]; j++)
{
for(i=1; i<=BLayerGrid[tolayer]; i++)
{
MG_Cell &mgc = GetMGBCell(i,j,tolayer);
mgc.M_value[rece] = (mgc.p_Res_cc)->M_value[send];
}
}
break;
}
return;
}
void MultiGrid::Prolongation(int send, int rece, int tolayer, int where) //v
{
int i,j;
WDOUBLE dxm, dxp, dym, dyp;
switch(where)
{
case 0:
for(j=1; j<=LayerGridY[tolayer]; j++)
{
for(i=1; i<=LayerGridX[tolayer]; i++)
{
MG_Cell &mgc = GetMGCell(i,j,tolayer);
switch (mgc.Protype)
{
case 0:
mgc.M_value[rece] = (mgc.p_Pro_xm)->M_value[send];
break;
case 1:
dxm=mgc.p_Pro_xm->dx;
dxp=mgc.p_Pro_xp->dx;
mgc.M_value[rece] = ((mgc.p_Pro_xm)->M_value[send]*dxp
+(mgc.p_Pro_xp)->M_value[send]*dxm)/(dxm+dxp);
break;
case 2:
dym=mgc.p_Pro_ym->dy;
dyp=mgc.p_Pro_yp->dy;
mgc.M_value[rece] = ((mgc.p_Pro_ym)->M_value[send]*dyp
+(mgc.p_Pro_yp)->M_value[send]*dym)/(dym+dyp);
break;
case 3:
dxm=mgc.p_Pro_xm->dx;
dxp=mgc.p_Pro_xp->dx;
dym=mgc.p_Pro_ym->dy;
dyp=mgc.p_Pro_yp->dy;
mgc.M_value[rece] = ((mgc.p_Pro_xm)->M_value[send]*dxp*dyp
+(mgc.p_Pro_xp)->M_value[send]*dxm*dyp+(mgc.p_Pro_ym)->M_value[send]*dxp*dym
+(mgc.p_Pro_yp)->M_value[send]*dxm*dym)/(dxm+dxp)/(dym+dyp);
break;
}
}
}
break;
case 1:
/*
for(j=1; j<=BLayerGrid[tolayer]; j++)
{
for(i=1; i<=BLayerGrid[tolayer]; i++)
{
MG_Cell &mgc = GetMGBCell(i,j,tolayer);
switch (mgc.Protype)
{
case 0:
mgc.M_value[rece] = (mgc.p_Pro_xm)->M_value[send];
break;
case 1:
mgc.M_value[rece] = ((mgc.p_Pro_xm)->M_value[send]
+(mgc.p_Pro_xp)->M_value[send])*0.5;
break;
case 2:
mgc.M_value[rece] = ((mgc.p_Pro_ym)->M_value[send]
+(mgc.p_Pro_yp)->M_value[send])*0.5;
break;
case 3:
mgc.M_value[rece] = ((mgc.p_Pro_xm)->M_value[send]
+(mgc.p_Pro_xp)->M_value[send]+(mgc.p_Pro_ym)->M_value[send]
+(mgc.p_Pro_yp)->M_value[send])*0.25;
break;
}
}
}
*/
break;
}
return;
}
//deprecated//May-25-tianhong
void MultiGrid::SendtoBottom(int what)
{
return;
}
//deprecated//May-25-tianhong
void MultiGrid::BottomSendBack(int what)
{
return;
}
//deprecated//May-25-tianhong
void MultiGrid::MG_BottomLayer(int field)
{
int n;
switch(BottomType)
{
// case 0: Do not do the Bottom Layer;
// case 1: Multigrid
// case 2: Direct Method
case 1:
//============================================================