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FEMultiBlockMesh.cpp
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/*This file is part of the FEBio Studio source code and is licensed under the MIT license
listed below.
See Copyright-FEBio-Studio.txt for details.
Copyright (c) 2020 University of Utah, The Trustees of Columbia University in
the City of New York, and others.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.*/
#include "stdafx.h"
#include "FEMultiBlockMesh.h"
#include <MeshLib/FEMesh.h>
#include <MeshLib/FENodeNodeList.h>
#include <GeomLib/geom.h>
FEShapeModifier::FEShapeModifier() {}
FEShapeModifier::~FEShapeModifier() {}
void MBBlock::SetNodes(int n1,int n2,int n3,int n4,int n5,int n6,int n7,int n8)
{
m_node[0] = n1;
m_node[1] = n2;
m_node[2] = n3;
m_node[3] = n4;
m_node[4] = n5;
m_node[5] = n6;
m_node[6] = n7;
m_node[7] = n8;
}
void MBBlock::SetZoning(double gx, double gy, double gz, bool bx, bool by, bool bz)
{
m_gx = gx;
m_gy = gy;
m_gz = gz;
m_bx = bx;
m_by = by;
m_bz = bz;
}
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
FEMultiBlockMesh::FEMultiBlockMesh()
{
}
//-----------------------------------------------------------------------------
FEMultiBlockMesh::~FEMultiBlockMesh(void)
{
}
//-----------------------------------------------------------------------------
// build the FE mesh
//
FEMesh* FEMultiBlockMesh::BuildMesh()
{
// create a new mesh
FEMesh* pm = new FEMesh();
// clear the node lists
for (int i = 0; i < m_MBNode.size(); ++i) m_MBNode[i].m_fenodes.clear();
for (int i = 0; i < m_MBEdge.size(); ++i) m_MBEdge[i].m_fenodes.clear();
for (int i = 0; i < m_MBFace.size(); ++i) m_MBFace[i].m_fenodes.clear();
for (int i = 0; i < m_MBlock.size(); ++i) m_MBlock[i].m_fenodes.clear();
// build the mesh
BuildNodes(pm);
BuildElements(pm);
BuildFaces(pm);
BuildEdges(pm);
// apply the shape modifiers
// ApplyMeshModifiers(pm);
// update the mesh
pm->BuildMesh();
return pm;
}
//-----------------------------------------------------------------------------
// build the FE nodes
//
void FEMultiBlockMesh::BuildNodes(FEMesh *pm)
{
int NB = m_MBlock.size();
int NF = m_MBFace.size();
int NE = m_MBEdge.size();
int NN = m_MBNode.size();
// now, let's count the nodes
int nodes = 0;
for (int i = 0; i < NN; ++i)
{
MBNode& N = m_MBNode[i];
if (N.m_type != NODE_SHAPE)
nodes += 1;
}
for (int i = 0; i < NE; ++i)
{
MBEdge& E = m_MBEdge[i];
nodes += (E.m_nx - 1);
}
for (int i = 0; i < NF; ++i)
{
MBFace& F = m_MBFace[i];
nodes += (F.m_nx - 1)*(F.m_ny - 1);
}
for (int i=0; i<NB; ++i)
{
MBBlock& B = m_MBlock[i];
nodes += (B.m_nx-1)*(B.m_ny-1)*(B.m_nz-1);
}
// create storage
pm->Create(nodes, 0);
// A. create the nodes
// A.1. add all MB nodes
nodes = 0;
FENode* pn = pm->NodePtr();
for (int i=0; i<NN; ++i)
{
MBNode& node = m_MBNode[i];
if (node.m_type != NODE_SHAPE)
{
pn->r = node.m_r;
node.m_ntag = nodes;
node.m_fenodes.push_back(nodes++);
pn->m_gid = node.m_gid;
++pn;
}
else node.m_ntag = -1;
}
// A.2. add all edge nodes
vec3d r1, r2, r3, r4, r5, r6, r7, r8;
double r, s, t, gr, gs, gt, fr, fs, ft, dr, ds, dt;
double N1, N2, N3, N4, N5, N6, N7, N8;
for (int i=0; i<NE; ++i)
{
MBEdge& e = m_MBEdge[i];
r1 = m_MBNode[e.Node(0)].m_r;
r2 = m_MBNode[e.Node(1)].m_r;
e.m_ntag = nodes;
fr = e.m_gx;
gr = 1;
if (e.m_bx)
{
gr = 2; if (e.m_nx%2) gr += fr;
for (int j=0; j<e.m_nx/2-1; ++j) gr = fr*gr+2;
gr = 1 / gr;
}
else
{
for (int j=0; j<e.m_nx-1; ++j) gr = fr*gr+1;
gr = 1 / gr;
}
dr = gr;
r = 0;
for (int j=0; j<e.m_nx; ++j)
{
if (j>0)
{
switch (e.edge.Type())
{
case EDGE_LINE:
pn->r = r1 * (1 - r) + r2 * r;
break;
case EDGE_3P_CIRC_ARC:
{
vec3d r0 = m_MBNode[e.edge.m_cnode].m_r;
vec3d r1 = m_MBNode[e.edge.m_node[0]].m_r - r0;
vec3d r2 = m_MBNode[e.edge.m_node[1]].m_r - r0;
vec3d n = r1 ^ r2; n.Normalize();
quatd q(n, vec3d(0, 0, 1)), qi = q.Inverse();
q.RotateVector(r1);
q.RotateVector(r2);
GM_CIRCLE_ARC c(vec2d(0, 0), vec2d(r1.x, r1.y), vec2d(r2.x, r2.y), e.m_winding);
vec2d a = c.Point(r);
vec3d p(a.x, a.y, 0);
qi.RotateVector(p);
pn->r = p + r0;
}
break;
default:
assert(false);
}
e.m_fenodes.push_back(nodes);
++pn;
++nodes;
}
r += dr;
dr *= fr;
if (e.m_bx && (j==e.m_nx/2-1))
{
if (e.m_nx%2 == 0) dr /= fr;
fr = 1.0/fr;
}
}
}
// A.3. add all face nodes
for (int i=0; i<NF; ++i)
{
MBFace& f = m_MBFace[i];
r1 = m_MBNode[f.m_node[0]].m_r;
r2 = m_MBNode[f.m_node[1]].m_r;
r3 = m_MBNode[f.m_node[2]].m_r;
r4 = m_MBNode[f.m_node[3]].m_r;
f.m_ntag = nodes;
int nx = f.m_nx;
int ny = f.m_ny;
fr = f.m_gx;
gr = 1;
if (f.m_bx)
{
gr = 2; if (f.m_nx%2) gr += fr;
for (int j=0; j<f.m_nx/2-1; ++j) gr = fr*gr+2;
gr = 1 / gr;
}
else
{
for (int j=0; j<f.m_nx-1; ++j) gr = fr*gr+1;
gr = 1 / gr;
}
fs = f.m_gy;
gs = 1;
if (f.m_by)
{
gs = 2; if (f.m_ny%2) gs += fs;
for (int j=0; j<f.m_ny/2-1; ++j) gs = fs*gs+2;
gs = 1 / gs;
}
else
{
for (int j=0; j<f.m_ny-1; ++j) gs = fs*gs+1;
gs = 1 / gs;
}
ds = gs;
s = 0;
for (int j=0; j<f.m_ny; ++j)
{
if (j>0)
{
dr = gr;
r = 0;
for (int k=0; k<f.m_nx; ++k)
{
if (k>0)
{
/*
N1 = (1-r)*(1-s);
N2 = r*(1-s);
N3 = r*s;
N4 = (1-r)*s;
pn->r = r1*N1 + r2*N2 + r3*N3 + r4*N4;
*/
double N1 = (1 - r)*(1 - s);
double N2 = r * (1 - s);
double N3 = r * s;
double N4 = (1 - r)*s;
// get edge points
vec3d e1 = pm->Node(GetFaceEdgeNodeIndex(f, 0, k)).r;
vec3d e2 = pm->Node(GetFaceEdgeNodeIndex(f, 1, j)).r;
vec3d e3 = pm->Node(GetFaceEdgeNodeIndex(f, 2, nx - k)).r;
vec3d e4 = pm->Node(GetFaceEdgeNodeIndex(f, 3, ny - j)).r;
vec3d p = e1 * (1 - s) + e2 * r + e3 * s + e4 * (1 - r) \
- (r1*N1 + r2 * N2 + r3 * N3 + r4 * N4);
pn->r = p;
f.m_fenodes.push_back(nodes);
++pn;
++nodes;
}
r += dr;
dr *= fr;
if (f.m_bx && (k==f.m_nx/2-1))
{
if (f.m_nx%2 == 0) dr /= fr;
fr = 1.0/fr;
}
}
if (f.m_bx) fr = 1.0/fr;
}
s += ds;
ds *= fs;
if (f.m_by && (j==f.m_ny/2-1))
{
if (f.m_ny%2 == 0) ds /= fs;
fs = 1.0/fs;
}
}
}
// A.4. add all block nodes
for (int nb=0; nb<NB; ++nb)
{
MBBlock& b = m_MBlock[nb];
r1 = m_MBNode[b.m_node[0]].m_r;
r2 = m_MBNode[b.m_node[1]].m_r;
r3 = m_MBNode[b.m_node[2]].m_r;
r4 = m_MBNode[b.m_node[3]].m_r;
r5 = m_MBNode[b.m_node[4]].m_r;
r6 = m_MBNode[b.m_node[5]].m_r;
r7 = m_MBNode[b.m_node[6]].m_r;
r8 = m_MBNode[b.m_node[7]].m_r;
b.m_ntag = nodes;
int nx = b.m_nx;
int ny = b.m_ny;
int nz = b.m_nz;
fr = b.m_gx;
gr = 1;
if (b.m_bx)
{
gr = 2; if (b.m_nx%2) gr += fr;
for (int j=0; j<b.m_nx/2-1; ++j) gr = fr*gr+2;
gr = 1 / gr;
}
else
{
for (int j=0; j<b.m_nx-1; ++j) gr = fr*gr+1;
gr = 1 / gr;
}
fs = b.m_gy;
gs = 1;
if (b.m_by)
{
gs = 2; if (b.m_ny%2) gs += fs;
for (int j=0; j<b.m_ny/2-1; ++j) gs = fs*gs+2;
gs = 1 / gs;
}
else
{
for (int j=0; j<b.m_ny-1; ++j) gs = fs*gs+1;
gs = 1 / gs;
}
ft = b.m_gz;
gt = 1;
if (b.m_bz)
{
gt = 2; if (b.m_nz%2) gt += ft;
for (int j=0; j<b.m_nz/2-1; ++j) gt = ft*gt+2;
gt = 1 / gt;
}
else
{
for (int j=0; j<b.m_nz-1; ++j) gt = ft*gt+1;
gt = 1 / gt;
}
dt = gt;
t = 0;
for (int k=0; k<b.m_nz; ++k)
{
if (k>0)
{
ds = gs;
s = 0;
for (int j=0; j<b.m_ny; ++j)
{
if (j>0)
{
dr = gr;
r = 0;
for (int i=0; i<b.m_nx; ++i)
{
if (r>0)
{
double N1 = (1-r)*(1-s)*(1-t);
double N2 = r*(1-s)*(1-t);
double N3 = r*s*(1-t);
double N4 = (1-r)*s*(1-t);
double N5 = (1-r)*(1-s)*t;
double N6 = r*(1-s)*t;
double N7 = r*s*t;
double N8 = (1-r)*s*t;
// tri-linear interpolation
// pn->r = r1*N1 + r2*N2 + r3*N3 + r4*N4 + r5*N5 + r6*N6 + r7*N7 + r8*N8;
// transfinite interpolation
vec3d f1 = pm->Node(GetBlockFaceNodeIndex(b, 4, i, ny - j)).r;
vec3d f2 = pm->Node(GetBlockFaceNodeIndex(b, 0, i, k)).r;
vec3d f3 = pm->Node(GetBlockFaceNodeIndex(b, 3, ny - j, k)).r;
vec3d f4 = pm->Node(GetBlockFaceNodeIndex(b, 5, i, j)).r;
vec3d f5 = pm->Node(GetBlockFaceNodeIndex(b, 2, nx - i, k)).r;
vec3d f6 = pm->Node(GetBlockFaceNodeIndex(b, 1, j, k)).r;
vec3d p = (f1 * (1 - t) + f2 * (1 - s) + f3 * (1 - r) + f4 * t + f5 * s + f6 * r \
- (r1*N1 + r2*N2 + r3*N3 + r4*N4 + r5*N5 + r6*N6 + r7*N7 + r8*N8))*0.5;
pn->r = p;
b.m_fenodes.push_back(nodes);
++pn;
++nodes;
}
r += dr;
dr *= fr;
if (b.m_bx && (i==b.m_nx/2-1))
{
if (b.m_nx%2 == 0) dr /= fr;
fr = 1.0/fr;
}
}
if (b.m_bx) fr = 1.0/fr;
}
s += ds;
ds *= fs;
if (b.m_by && (j==b.m_ny/2-1))
{
if (b.m_ny%2 == 0) ds /= fs;
fs = 1.0/fs;
}
}
if (b.m_by) fs = 1.0/fs;
}
t += dt;
dt *= ft;
if (b.m_bz && (k==b.m_nz/2-1))
{
if (b.m_nz%2 == 0) dt /= ft;
ft = 1.0/ft;
}
}
}
// make sure we have the right number of nodes
assert(nodes == pm->Nodes());
}
//-----------------------------------------------------------------------------
// build the FE elements
//
void FEMultiBlockMesh::BuildElements(FEMesh* pm)
{
int i, j, k, l;
int NB = m_MBlock.size();
// figure out how many elements we have
int elems = 0;
for (i=0; i<NB; ++i)
{
MBBlock& B = m_MBlock[i];
elems += B.m_nx*B.m_ny*B.m_nz;
}
// allocate elements
pm->Create(0, elems);
// create the elements
int eid = 0;
for (i=0; i<NB; ++i)
{
MBBlock& b = m_MBlock[i];
for (j=0; j<b.m_nz; ++j)
{
for (k=0; k<b.m_ny; ++k)
{
for (l=0; l<b.m_nx; ++l)
{
FEElement_* pe = pm->ElementPtr(eid++);
pe->m_node[0] = GetBlockNodeIndex(b, l , k , j);
pe->m_node[1] = GetBlockNodeIndex(b, l+1, k , j);
pe->m_node[2] = GetBlockNodeIndex(b, l+1, k+1, j);
pe->m_node[3] = GetBlockNodeIndex(b, l , k+1, j);
pe->m_node[4] = GetBlockNodeIndex(b, l , k , j+1);
pe->m_node[5] = GetBlockNodeIndex(b, l+1, k , j+1);
pe->m_node[6] = GetBlockNodeIndex(b, l+1, k+1, j+1);
pe->m_node[7] = GetBlockNodeIndex(b, l , k+1, j+1);
pe->SetType(FE_HEX8);
pe->m_gid = b.m_gid;
}
}
}
}
}
//-----------------------------------------------------------------------------
// Build the FE faces
//
void FEMultiBlockMesh::BuildFaces(FEMesh* pm)
{
int i, j, k;
// count faces
int faces = 0;
int n1, n2;
for (i=0; i<(int) m_MBFace.size(); ++i)
{
MBFace& f = m_MBFace[i];
if (f.m_gid >= 0) faces += f.m_nx*f.m_ny;
}
// allocate faces
pm->Create(0,0, faces);
// build the faces
FEFace* pf = pm->FacePtr();
int m = 0;
for (k=0; k<(int) m_MBFace.size(); ++k)
{
MBFace& f = m_MBFace[k];
if (f.m_gid >= 0)
{
n1 = f.m_block[0];
n2 = f.m_block[1];
for (i=0; i<f.m_nx; ++i)
{
for (j=0; j<f.m_ny; ++j, ++pf)
{
pf->SetType(FE_FACE_QUAD4);
pf->m_gid = pf->m_sid = f.m_gid;
pf->n[0] = GetFaceNodeIndex(f, i , j );
pf->n[1] = GetFaceNodeIndex(f, i+1, j );
pf->n[2] = GetFaceNodeIndex(f, i+1, j+1);
pf->n[3] = GetFaceNodeIndex(f, i , j+1);
}
}
++m;
}
}
}
//-----------------------------------------------------------------------------
// Build the FE edges
//
void FEMultiBlockMesh::BuildEdges(FEMesh* pm)
{
int i, k;
// count edges
int edges = 0;
for (i=0; i<(int) m_MBEdge.size(); ++i)
{
MBEdge& e = m_MBEdge[i];
if (e.m_gid >= 0) edges += e.m_nx;
}
// allocate faces
pm->Create(0,0,0,edges);
// build the edges
FEEdge* pe = pm->EdgePtr();
for (k=0; k<(int) m_MBEdge.size(); ++k)
{
MBEdge& e = m_MBEdge[k];
if (e.m_gid >= 0)
{
for (i=0; i<e.m_nx; ++i, ++pe)
{
pe->m_gid = e.m_gid;
pe->SetType(FE_EDGE2);
pe->n[0] = GetEdgeNodeIndex(e, i);
pe->n[1] = GetEdgeNodeIndex(e, i+1);
}
}
}
}
//-----------------------------------------------------------------------------
void FEMultiBlockMesh::BuildMBEdges()
{
int i, j, n, n1, n2;
int NF = m_MBFace.size();
m_MBEdge.clear();
m_MBEdge.reserve(4*NF);
int NE = 0;
for (i=0; i<NF; ++i)
{
MBFace& f = m_MBFace[i];
for (j=0; j<4; ++j)
{
n1 = f.m_node[j];
n2 = f.m_node[(j+1)%4];
n = FindEdge(n1, n2);
if (n >= 0)
{
MBEdge& e = m_MBEdge[n];
f.m_edge[j] = n;
if (f.IsExternal())
{
if (e.m_face[0] == -1) e.m_face[0] = i;
else e.m_face[1] = i;
}
}
else
{
MBEdge e(n1, n2);
e.m_face[0] = e.m_face[1] = -1;
if (f.IsExternal()) e.m_face[0] = i;
switch (j)
{
case 0:
e.m_nx = f.m_nx;
e.m_gx = f.m_gx;
e.m_bx = f.m_bx;
break;
case 1:
e.m_nx = f.m_ny;
e.m_gx = f.m_gy;
e.m_bx = f.m_by;
break;
case 2:
e.m_nx = f.m_nx;
e.m_gx = (f.m_bx?f.m_gx:1/f.m_gx);
e.m_bx = f.m_bx;
break;
case 3:
e.m_nx = f.m_ny;
e.m_gx = (f.m_by?f.m_gy:1/f.m_gy);
e.m_bx = f.m_by;
break;
}
m_MBEdge.push_back(e);
f.m_edge[j] = NE++;
}
}
}
NE = m_MBEdge.size();
}
//-----------------------------------------------------------------------------
// This function builds all the faces of the multi-block
void FEMultiBlockMesh::BuildMBFaces()
{
// clear all faces
m_MBFace.clear();
// get the number of blocks
int NB = m_MBlock.size();
// reset all block tags
for (int i=0; i<NB; ++i) m_MBlock[i].m_ntag = 0;
// count faces
int faces = 0;
for (int i=0; i<NB; ++i)
{
MBBlock& B = m_MBlock[i];
for (int j=0; j<6; ++j)
{
if (B.m_Nbr[j] == -1) ++faces;
else
{
MBBlock& B2 = m_MBlock[ B.m_Nbr[j] ];
if (B2.m_ntag == 0) ++faces;
}
}
B.m_ntag = 1;
}
// create face array
m_MBFace.resize(faces);
// reset all block tags
for (int i=0; i<NB; ++i) m_MBlock[i].m_ntag = 0;
// fill face array
faces = 0;
MBFace f;
int n1, n2;
for (int i=0; i<NB; ++i)
{
MBBlock& B = m_MBlock[i];
n1 = i;
for (int j=0; j<6; ++j)
{
bool badd = false;
n2 = -1;
if (B.m_Nbr[j] == -1) badd = true;
else
{
MBBlock& B2 = m_MBlock[ B.m_Nbr[j] ];
if (B2.m_ntag == 0) { badd = true; n2 = B.m_Nbr[j]; }
else
{
for (int k=0; k<6; ++k)
{
if (B2.m_Nbr[k] == i)
{
B.m_face[j] = B2.m_face[k];
break;
}
}
}
}
if (badd)
{
f = BuildBlockFace(B, j);
B.m_face[j] = faces;
f.m_block[0] = n1;
f.m_block[1] = n2;
m_MBFace[faces++] = f;
}
}
B.m_ntag = 1;
}
}
//-----------------------------------------------------------------------------
void FEMultiBlockMesh::FindFaceNeighbours()
{
// build the node-face table
vector< vector<int> > NFT;
BuildNodeFaceTable(NFT);
// reset all face neighbours
int NF = (int)m_MBFace.size();
for (int i=0; i<NF; ++i)
{
MBFace& F = m_MBFace[i];
for (int j=0; j<4; ++j) F.m_nbr[j] = -1;
}
// find the face's neighbours
int nf, n1, n2;
for (int i=0; i<NF; ++i)
{
MBFace& F = m_MBFace[i];
if (F.IsExternal())
{
for (int j=0; j<4; ++j)
{
if (F.m_nbr[j] == -1)
{
// pick a node
n1 = F.m_node[j];
n2 = F.m_node[(j+1)%4];
for (int k=0; k<(int) NFT[n1].size(); ++k)
{
nf = NFT[n1][k];
if (nf != i)
{
MBFace& F2 = m_MBFace[nf];
if (F2.IsExternal())
{
int l = FindEdgeIndex(F2, n1, n2);
if (l != -1)
{
F.m_nbr[j] = nf;
F2.m_nbr[l] = i;
break;
}
}
}
}
}
}
}
}
}
//-----------------------------------------------------------------------------
// This function finds the neighbors for all blocks.
// It is called from UpdateMB().
// At this point it is assumed that the nodes and the blocks are defined.
void FEMultiBlockMesh::FindBlockNeighbours()
{
// build the node-block table
// This table stores for each ndoe the list of blocks that the node connects to
vector< vector<int> > NBT;
BuildNodeBlockTable(NBT);
// reset all block's neighbours
int NB = m_MBlock.size();
for (int i=0; i<NB; ++i)
{
MBBlock& B = m_MBlock[i];
for (int j=0; j<6; ++j) B.m_Nbr[j] = -1;
}
// Now we have to find all the block's neighbours.
// We do this by looping over all the faces for each block
// and finding the block that has the same face.
for (int i=0; i<NB; ++i)
{
MBBlock& B = m_MBlock[i];
for (int j=0; j<6; ++j)
{
if (B.m_Nbr[j] == -1)
{
// get the block's face
MBFace face = BuildBlockFace(B, j);
// pick a node on this face
int inode = face.m_node[0];
// loop over all the blocks that connect to this node
for (int k=0; k<(int) NBT[inode].size(); ++k)
{
// get the next block index
int nb = NBT[inode][k];
// make sure it is not this block
if (nb != i)
{
// get the other block
MBBlock& B2 = m_MBlock[nb];
// find the face index of the matching face
int l = FindFaceIndex(m_MBlock[nb], face);
// if we find it, assign the neighbors
if (l != -1)
{
B.m_Nbr[j] = nb;
B2.m_Nbr[l] = i;
break;
}
}
}
}
}
}
}
//-----------------------------------------------------------------------------
MBFace FEMultiBlockMesh::BuildBlockFace(MBBlock& B, int j)
{
MBFace f;
int* n = f.m_node;
int* bn = B.m_node;
switch (j)
{
case 0:
n[0] = bn[0]; n[1] = bn[1]; n[2] = bn[5]; n[3] = bn[4];
f.m_nx = B.m_nx; f.m_ny = B.m_nz;
f.m_gx = B.m_gx; f.m_gy = B.m_gz;
f.m_bx = B.m_bx; f.m_by = B.m_bz;
break;
case 1:
n[0] = bn[1]; n[1] = bn[2]; n[2] = bn[6]; n[3] = bn[5];
f.m_nx = B.m_ny; f.m_ny = B.m_nz;
f.m_gx = B.m_gy; f.m_gy = B.m_gz;
f.m_bx = B.m_by; f.m_by = B.m_bz;
break;
case 2:
n[0] = bn[2]; n[1] = bn[3]; n[2] = bn[7]; n[3] = bn[6];
f.m_nx = B.m_nx; f.m_ny = B.m_nz;
f.m_gx = (B.m_bx?B.m_gx:1/B.m_gx); f.m_gy = B.m_gz;
f.m_bx = B.m_bx; f.m_by = B.m_bz;
break;
case 3:
n[0] = bn[3]; n[1] = bn[0]; n[2] = bn[4]; n[3] = bn[7];
f.m_nx = B.m_ny; f.m_ny = B.m_nz;
f.m_gx = (B.m_by?B.m_gy:1/B.m_gy); f.m_gy = B.m_gz;
f.m_bx = B.m_by; f.m_by = B.m_bz;
break;
case 4:
n[0] = bn[3]; n[1] = bn[2]; n[2] = bn[1]; n[3] = bn[0];
f.m_nx = B.m_nx; f.m_ny = B.m_ny;
f.m_gx = B.m_gx; f.m_gy = (B.m_by?B.m_gy:1/B.m_gy);
f.m_bx = B.m_bx; f.m_by = B.m_by;
break;
case 5:
n[0] = bn[4]; n[1] = bn[5]; n[2] = bn[6]; n[3] = bn[7];
f.m_nx = B.m_nx; f.m_ny = B.m_ny;
f.m_gx = B.m_gx; f.m_gy = B.m_gy;
f.m_bx = B.m_bx; f.m_by = B.m_by;
break;
default:
assert(false);
}
return f;
}
//-----------------------------------------------------------------------------
int FEMultiBlockMesh::FindEdgeIndex(MBFace& F, int n1, int n2)
{
int m1, m2;
for (int j=0; j<4; ++j)
{
m1 = F.m_node[j];
m2 = F.m_node[(j+1)%4];
if (((n1==m1) && (n2==m2))||((n1==m2)&& (n2==m1))) return j;
}
return -1;
}
//-----------------------------------------------------------------------------
int FEMultiBlockMesh::FindFaceIndex(MBBlock &B, MBFace &face)
{
int i;
MBFace f2;
for (i=0; i<6; ++i)
{
f2 = BuildBlockFace(B, i);
if (f2 == face) return i;
}
return -1;
}
//-----------------------------------------------------------------------------
void FEMultiBlockMesh::BuildNodeFaceTable(vector< vector<int> >& NFT)
{
int i, j, n;
int NN = m_MBNode.size();
int NF = m_MBFace.size();
// calculate node valences
for (i=0; i<NN; ++i) m_MBNode[i].m_ntag = 0;
for (i=0; i<NF; ++i)
{
MBFace& F = m_MBFace[i];
for (j=0; j<4; ++j) m_MBNode[ F.m_node[j] ].m_ntag++;
}
// create the node-block array
NFT.resize(NN);
for (i=0; i<NN; ++i)
{
if (m_MBNode[i].m_ntag > 0)
{
NFT[i].resize(m_MBNode[i].m_ntag);
m_MBNode[i].m_ntag = 0;
}
}
// fill the node-block array
for (i=0; i<NF; ++i)
{
MBFace& F = m_MBFace[i];
for (j=0; j<4; ++j)
{
n = F.m_node[j];
MBNode& node = m_MBNode[n];
NFT[n][node.m_ntag++] = i;
}
}
}
//-----------------------------------------------------------------------------
void FEMultiBlockMesh::BuildNodeBlockTable(vector<vector<int> > &NBT)
{
int i, j, n;
int NN = m_MBNode.size();
int NB = m_MBlock.size();
// calculate node valences
for (i=0; i<NN; ++i) m_MBNode[i].m_ntag = 0;