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Mesh Oriented datABase
(version 5.4.1)
Array-based unstructured mesh datastructure
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|
Mesh Oriented datABase
(version 5.4.1)
Array-based unstructured mesh datastructure
|
#include <Intx2MeshInPlane.hpp>
Inheritance diagram for moab::Intx2MeshInPlane: Collaboration diagram for moab::Intx2MeshInPlane:Public Member Functions | |
| Intx2MeshInPlane (Interface *mbimpl) | |
| virtual | ~Intx2MeshInPlane () |
| double | setup_tgt_cell (EntityHandle tgt, int &nsTgt) |
| ErrorCode | computeIntersectionBetweenTgtAndSrc (EntityHandle tgt, EntityHandle src, double *P, int &nP, double &area, int markb[MAXEDGES], int markr[MAXEDGES], int &nsSrc, int &nsTgt, bool check_boxes_first=false) |
| ErrorCode | findNodes (EntityHandle tgt, int nsTgt, EntityHandle src, int nsSrc, double *iP, int nP) |
Definition at line 15 of file Intx2MeshInPlane.hpp.
| moab::Intx2MeshInPlane::Intx2MeshInPlane | ( | Interface * | mbimpl | ) |
Definition at line 15 of file Intx2MeshInPlane.cpp.
: Intx2Mesh( mbimpl ) {}
| moab::Intx2MeshInPlane::~Intx2MeshInPlane | ( | ) | [virtual] |
Definition at line 17 of file Intx2MeshInPlane.cpp.
{}
| ErrorCode moab::Intx2MeshInPlane::computeIntersectionBetweenTgtAndSrc | ( | EntityHandle | tgt, |
| EntityHandle | src, | ||
| double * | P, | ||
| int & | nP, | ||
| double & | area, | ||
| int | markb[MAXEDGES], | ||
| int | markr[MAXEDGES], | ||
| int & | nsSrc, | ||
| int & | nsTgt, | ||
| bool | check_boxes_first = false |
||
| ) | [virtual] |
Implements moab::Intx2Mesh.
Definition at line 47 of file Intx2MeshInPlane.cpp.
References moab::IntxUtils::area2D(), moab::IntxUtils::borderPointsOfXinY2(), moab::GeomUtil::bounding_boxes_overlap(), moab::Intx2Mesh::box_error, moab::IntxUtils::EdgeIntersections2(), moab::Intx2Mesh::epsilon_1, moab::Intx2Mesh::epsilon_area, ErrorCode, moab::Interface::get_connectivity(), moab::Interface::get_coords(), moab::Interface::id_from_handle(), moab::Interface::list_entities(), MAXEDGES, moab::Intx2Mesh::mb, MB_CHK_ERR, MB_SUCCESS, setup_tgt_cell(), moab::IntxUtils::SortAndRemoveDoubles2(), moab::Intx2Mesh::srcConn, moab::Intx2Mesh::srcCoords, moab::Intx2Mesh::srcCoords2D, moab::Intx2Mesh::tgtCoords, and moab::Intx2Mesh::tgtCoords2D.
{
int num_nodes = 0;
ErrorCode rval = mb->get_connectivity( src, srcConn, num_nodes );MB_CHK_ERR( rval );
nsSrc = num_nodes;
rval = mb->get_coords( srcConn, num_nodes, &( srcCoords[0][0] ) );MB_CHK_ERR( rval );
area = 0.;
nP = 0; // number of intersection points we are marking the boundary of src!
if( check_boxes_first )
{
setup_tgt_cell( tgt, nsTgt ); // we do not need area here
// look at the boxes formed with vertices; if they are far away, return false early
if( !GeomUtil::bounding_boxes_overlap( tgtCoords, nsTgt, srcCoords, nsSrc, box_error ) )
return MB_SUCCESS; // no error, but no intersection, decide early to get out
}
#ifdef ENABLE_DEBUG
if( dbg_1 )
{
std::cout << "tgt " << mb->id_from_handle( tgt ) << "\n";
for( int j = 0; j < nsTgt; j++ )
{
std::cout << tgtCoords[j] << "\n";
}
std::cout << "src " << mb->id_from_handle( src ) << "\n";
for( int j = 0; j < nsSrc; j++ )
{
std::cout << srcCoords[j] << "\n";
}
mb->list_entities( &tgt, 1 );
mb->list_entities( &src, 1 );
}
#endif
for( int j = 0; j < nsSrc; j++ )
{
srcCoords2D[2 * j] = srcCoords[j][0]; // x coordinate,
srcCoords2D[2 * j + 1] = srcCoords[j][1]; // y coordinate
}
#ifdef ENABLE_DEBUG
if( dbg_1 )
{
// std::cout << "gnomonic plane: " << plane << "\n";
std::cout << " tgt \n";
for( int j = 0; j < nsTgt; j++ )
{
std::cout << tgtCoords2D[2 * j] << " " << tgtCoords2D[2 * j + 1] << "\n ";
}
std::cout << " src\n";
for( int j = 0; j < nsSrc; j++ )
{
std::cout << srcCoords2D[2 * j] << " " << srcCoords2D[2 * j + 1] << "\n";
}
}
#endif
rval = IntxUtils::EdgeIntersections2( srcCoords2D, nsSrc, tgtCoords2D, nsTgt, markb, markr, P, nP );MB_CHK_ERR( rval );
#ifdef ENABLE_DEBUG
if( dbg_1 )
{
for( int k = 0; k < 3; k++ )
{
std::cout << " markb, markr: " << k << " " << markb[k] << " " << markr[k] << "\n";
}
}
#endif
int side[MAXEDGES] = { 0 }; // this refers to what side? src or tgt?
int extraPoints =
IntxUtils::borderPointsOfXinY2( srcCoords2D, nsSrc, tgtCoords2D, nsTgt, &( P[2 * nP] ), side, epsilon_area );
if( extraPoints >= 1 )
{
for( int k = 0; k < nsSrc; k++ )
{
if( side[k] )
{
// this means that vertex k of src is inside convex tgt; mark edges k-1 and k in
// src,
// as being "intersected" by tgt; (even though they might not be intersected by
// other edges, the fact that their apex is inside, is good enough)
markb[k] = 1;
markb[( k + nsSrc - 1 ) % nsSrc] =
1; // it is the previous edge, actually, but instead of doing -1, it is
// better to do modulo +3 (modulo 4)
// null side b for next call
side[k] = 0;
}
}
}
#ifdef ENABLE_DEBUG
if( dbg_1 )
{
for( int k = 0; k < 3; k++ )
{
std::cout << " markb, markr: " << k << " " << markb[k] << " " << markr[k] << "\n";
}
}
#endif
nP += extraPoints;
extraPoints =
IntxUtils::borderPointsOfXinY2( tgtCoords2D, nsTgt, srcCoords2D, nsSrc, &( P[2 * nP] ), side, epsilon_area );
if( extraPoints >= 1 )
{
for( int k = 0; k < nsTgt; k++ )
{
if( side[k] )
{
// this is to mark that tgt edges k-1 and k are intersecting src
markr[k] = 1;
markr[( k + nsTgt - 1 ) % nsTgt] =
1; // it is the previous edge, actually, but instead of doing -1, it is
// better to do modulo +3 (modulo 4)
// null side b for next call
}
}
}
#ifdef ENABLE_DEBUG
if( dbg_1 )
{
for( int k = 0; k < 3; k++ )
{
std::cout << " markb, markr: " << k << " " << markb[k] << " " << markr[k] << "\n";
}
}
#endif
nP += extraPoints;
// now sort and orient the points in P, such that they are forming a convex polygon
// this will be the foundation of our new mesh
// this works if the polygons are convex
IntxUtils::SortAndRemoveDoubles2( P, nP, epsilon_1 ); // nP should be at most 8 in the end ?
// if there are more than 3 points, some area will be positive
if( nP >= 3 )
{
for( int k = 1; k < nP - 1; k++ )
area += IntxUtils::area2D( P, &P[2 * k], &P[2 * k + 2] );
}
return MB_SUCCESS; // no error
}
| ErrorCode moab::Intx2MeshInPlane::findNodes | ( | EntityHandle | tgt, |
| int | nsTgt, | ||
| EntityHandle | src, | ||
| int | nsSrc, | ||
| double * | iP, | ||
| int | nP | ||
| ) | [virtual] |
Implements moab::Intx2Mesh.
Definition at line 206 of file Intx2MeshInPlane.cpp.
References moab::Interface::add_entities(), moab::IntxUtils::area2D(), moab::CartVect::array(), moab::Intx2Mesh::correct_polygon(), moab::Intx2Mesh::counting, moab::Intx2Mesh::countTag, moab::Interface::create_element(), moab::Interface::create_vertex(), moab::IntxUtils::dist2(), moab::Intx2Mesh::epsilon_1, ErrorCode, moab::Intx2Mesh::extraNodesVec, moab::Interface::get_coords(), moab::Interface::id_from_handle(), moab::Range::index(), length_squared(), MAXEDGES, moab::Intx2Mesh::mb, MB_CHK_SET_ERR, MB_SUCCESS, MBPOLYGON, moab::Intx2Mesh::neighTgtEdgeTag, moab::Intx2Mesh::outSet, moab::Intx2Mesh::rs1, moab::Intx2Mesh::rs2, moab::Intx2Mesh::srcConn, moab::Intx2Mesh::srcCoords2D, moab::Intx2Mesh::srcParentTag, moab::Interface::tag_get_data(), moab::Interface::tag_set_data(), moab::Intx2Mesh::tgtConn, moab::Intx2Mesh::tgtCoords2D, moab::Intx2Mesh::TgtEdges, moab::Intx2Mesh::tgtParentTag, and moab::Interface::write_mesh().
{
// except for gnomonic projection, everything is the same as spherical intx
// start copy
// first of all, check against tgt and src vertices
//
#ifdef ENABLE_DEBUG
if( dbg_1 )
{
std::cout << "tgt, src, nP, P " << mb->id_from_handle( tgt ) << " " << mb->id_from_handle( src ) << " " << nP
<< "\n";
for( int n = 0; n < nP; n++ )
std::cout << " \t" << iP[2 * n] << "\t" << iP[2 * n + 1] << "\n";
}
#endif
// get the edges for the tgt triangle; the extra points will be on those edges, saved as
// lists (unordetgt)
// first get the list of edges adjacent to the tgt cell
// use the neighTgtEdgeTag
EntityHandle adjTgtEdges[MAXEDGES];
ErrorCode rval = mb->tag_get_data( neighTgtEdgeTag, &tgt, 1, &( adjTgtEdges[0] ) );MB_CHK_SET_ERR( rval, "can't get edge tgt tag" );
// we know that we have only nsTgt edges here; [nsTgt, MAXEDGES) are ignored, but it is small
// potatoes
// these will be in the new mesh, mbOut
// some of them will be handles to the initial vertices from src or tgt meshes (lagr or euler)
EntityHandle* foundIds = new EntityHandle[nP];
for( int i = 0; i < nP; i++ )
{
double* pp = &iP[2 * i]; // iP+2*i
//
CartVect pos( pp[0], pp[1], 0. );
int found = 0;
// first, are they on vertices from tgt or src?
// priority is the tgt mesh (mb2?)
int j = 0;
EntityHandle outNode = (EntityHandle)0;
for( j = 0; j < nsTgt && !found; j++ )
{
// int node = tgtTri.v[j];
double d2 = IntxUtils::dist2( pp, &tgtCoords2D[2 * j] );
if( d2 < epsilon_1 )
{
foundIds[i] = tgtConn[j]; // no new node
found = 1;
#ifdef ENABLE_DEBUG
if( dbg_1 )
std::cout << " tgt node j:" << j << " id:" << mb->id_from_handle( tgtConn[j] )
<< " 2d coords:" << tgtCoords2D[2 * j] << " " << tgtCoords2D[2 * j + 1] << " d2: " << d2
<< " \n";
#endif
}
}
for( j = 0; j < nsSrc && !found; j++ )
{
// int node = srcTri.v[j];
double d2 = IntxUtils::dist2( pp, &srcCoords2D[2 * j] );
if( d2 < epsilon_1 )
{
// suspect is srcConn[j] corresponding in mbOut
foundIds[i] = srcConn[j]; // no new node
found = 1;
#ifdef ENABLE_DEBUG
if( dbg_1 )
std::cout << " src node " << j << " " << mb->id_from_handle( srcConn[j] ) << " d2:" << d2 << " \n";
#endif
}
}
if( !found )
{
// find the edge it belongs, first, on the tgt element
//
for( j = 0; j < nsTgt; j++ )
{
int j1 = ( j + 1 ) % nsTgt;
double area = IntxUtils::area2D( &tgtCoords2D[2 * j], &tgtCoords2D[2 * j1], pp );
#ifdef ENABLE_DEBUG
if( dbg_1 )
std::cout << " edge " << j << ": " << mb->id_from_handle( adjTgtEdges[j] ) << " " << tgtConn[j]
<< " " << tgtConn[j1] << " area : " << area << "\n";
#endif
if( fabs( area ) < epsilon_1 / 2 )
{
// found the edge; now find if there is a point in the list here
// std::vector * expts = extraNodesMap[tgtEdges[j]];
int indx = TgtEdges.index( adjTgtEdges[j] );
if( indx < 0 ) // CID 181166 (#1 of 1): Argument cannot be negative (NEGATIVE_RETURNS)
{
std::cerr << " error in adjacent tgt edge: " << mb->id_from_handle( adjTgtEdges[j] ) << "\n";
delete[] foundIds;
return MB_FAILURE;
}
std::vector< EntityHandle >* expts = extraNodesVec[indx];
// if the points pp is between extra points, then just give that id
// if not, create a new point, (check the id)
// get the coordinates of the extra points so far
int nbExtraNodesSoFar = expts->size();
if( nbExtraNodesSoFar > 0 )
{
CartVect* coords1 = new CartVect[nbExtraNodesSoFar];
mb->get_coords( &( *expts )[0], nbExtraNodesSoFar, &( coords1[0][0] ) );
// std::list::iterator it;
for( int k = 0; k < nbExtraNodesSoFar && !found; k++ )
{
// int pnt = *it;
double d3 = ( pos - coords1[k] ).length_squared();
if( d3 < epsilon_1 )
{
found = 1;
foundIds[i] = ( *expts )[k];
#ifdef ENABLE_DEBUG
if( dbg_1 ) std::cout << " found node:" << foundIds[i] << std::endl;
#endif
}
}
delete[] coords1;
}
if( !found )
{
// create a new point in 2d (at the intersection)
// foundIds[i] = m_num2dPoints;
// expts.push_back(m_num2dPoints);
// need to create a new node in mbOut
// this will be on the edge, and it will be added to the local list
mb->create_vertex( pos.array(), outNode );
( *expts ).push_back( outNode );
foundIds[i] = outNode;
found = 1;
#ifdef ENABLE_DEBUG
if( dbg_1 ) std::cout << " new node: " << outNode << std::endl;
#endif
}
}
}
}
if( !found )
{
std::cout << " tgt polygon: ";
for( int j1 = 0; j1 < nsTgt; j1++ )
{
std::cout << tgtCoords2D[2 * j1] << " " << tgtCoords2D[2 * j1 + 1] << "\n";
}
std::cout << " a point pp is not on a tgt polygon " << *pp << " " << pp[1] << " tgt polygon "
<< mb->id_from_handle( tgt ) << " \n";
delete[] foundIds;
return MB_FAILURE;
}
}
#ifdef ENABLE_DEBUG
if( dbg_1 )
{
std::cout << " candidate polygon: nP " << nP << "\n";
for( int i1 = 0; i1 < nP; i1++ )
std::cout << iP[2 * i1] << " " << iP[2 * i1 + 1] << " " << foundIds[i1] << "\n";
}
#endif
// first, find out if we have nodes collapsed; shrink them
// we may have to reduce nP
// it is possible that some nodes are collapsed after intersection only
// nodes will always be in order (convex intersection)
correct_polygon( foundIds, nP );
// now we can build the triangles, from P array, with foundIds
// we will put them in the out set
if( nP >= 3 )
{
EntityHandle polyNew;
mb->create_element( MBPOLYGON, foundIds, nP, polyNew );
mb->add_entities( outSet, &polyNew, 1 );
// tag it with the index ids from tgt and src sets
int id = rs1.index( src ); // index starts from 0
mb->tag_set_data( srcParentTag, &polyNew, 1, &id );
id = rs2.index( tgt );
mb->tag_set_data( tgtParentTag, &polyNew, 1, &id );
counting++;
mb->tag_set_data( countTag, &polyNew, 1, &counting );
#ifdef ENABLE_DEBUG
if( dbg_1 )
{
std::cout << "Count: " << counting + 1 << "\n";
std::cout << " polygon " << mb->id_from_handle( polyNew ) << " nodes: " << nP << " :";
for( int i1 = 0; i1 < nP; i1++ )
std::cout << " " << mb->id_from_handle( foundIds[i1] );
std::cout << "\n";
std::vector< CartVect > posi( nP );
mb->get_coords( foundIds, nP, &( posi[0][0] ) );
for( int i1 = 0; i1 < nP; i1++ )
std::cout << iP[2 * i1] << " " << iP[2 * i1 + 1] << " " << posi[i1] << "\n";
std::stringstream fff;
fff << "file0" << counting << ".vtk";
mb->write_mesh( fff.str().c_str(), &outSet, 1 );
}
#endif
}
delete[] foundIds;
foundIds = NULL;
return MB_SUCCESS;
// end copy
}
| double moab::Intx2MeshInPlane::setup_tgt_cell | ( | EntityHandle | tgt, |
| int & | nsTgt | ||
| ) | [virtual] |
Implements moab::Intx2Mesh.
Definition at line 19 of file Intx2MeshInPlane.cpp.
References moab::IntxUtils::area2D(), ErrorCode, moab::Interface::get_connectivity(), moab::Interface::get_coords(), moab::Intx2Mesh::mb, MB_SUCCESS, moab::Intx2Mesh::tgtConn, moab::Intx2Mesh::tgtCoords, and moab::Intx2Mesh::tgtCoords2D.
Referenced by computeIntersectionBetweenTgtAndSrc().
{
// the points will be at most ?; they will describe a convex patch, after the points will be
// ordered and collapsed (eliminate doubles) the area is not really required get coordinates of
// the tgt quad
double cellArea = 0;
int num_nodes;
ErrorCode rval = mb->get_connectivity( tgt, tgtConn, num_nodes );
if( MB_SUCCESS != rval ) return 1.; // it should be an error
nsTgt = num_nodes;
rval = mb->get_coords( tgtConn, num_nodes, &( tgtCoords[0][0] ) );
if( MB_SUCCESS != rval ) return 1.; // it should be an error
for( int j = 0; j < nsTgt; j++ )
{
// populate coords in the plane for intersection
// they should be oriented correctly, positively
tgtCoords2D[2 * j] = tgtCoords[j][0]; // x coordinate,
tgtCoords2D[2 * j + 1] = tgtCoords[j][1]; // y coordinate
}
for( int j = 1; j < nsTgt - 1; j++ )
cellArea += IntxUtils::area2D( &tgtCoords2D[0], &tgtCoords2D[2 * j], &tgtCoords2D[2 * j + 2] );
return cellArea;
}
1.7.6.1.
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