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0021543: EDF 1978 SMESH: Viscous layer for 2D meshes

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debug on a complex sketch
This commit is contained in:
eap 2012-11-07 08:31:22 +00:00
parent b0362f7109
commit 87905be5e7
1 changed files with 151 additions and 57 deletions
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208
src/StdMeshers/StdMeshers_ViscousLayers2D.cxx
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@ -291,6 +291,7 @@ namespace VISCOUS_2D
bool Compute(const _Segment& seg1, const _Segment& seg2, bool seg2IsRay = false )
{
const double eps = 1e-10;
_vec1 = seg1.p2() - seg1.p1();
_vec2 = seg2.p2() - seg2.p1();
_vec21 = seg1.p1() - seg2.p1();
@ -298,10 +299,10 @@ namespace VISCOUS_2D
if ( fabs(_D) < std::numeric_limits<double>::min())
return false;
_param1 = _vec2.Crossed(_vec21) / _D;
if (_param1 < 0 || _param1 > 1 )
if (_param1 < -eps || _param1 > 1 + eps )
return false;
_param2 = _vec1.Crossed(_vec21) / _D;
if (_param2 < 0 || ( !seg2IsRay && _param2 > 1 ))
if (_param2 < -eps || ( !seg2IsRay && _param2 > 1 + eps ))
return false;
return true;
}
@ -344,6 +345,10 @@ namespace VISCOUS_2D
const TopoDS_Edge& E,
const TopoDS_Vertex& V);
void setLenRatio( _LayerEdge& LE, const gp_Pnt& pOut );
void setLayerEdgeData( _LayerEdge& lEdge,
const double u,
Handle(Geom2d_Curve)& pcurve,
const bool reverse);
void adjustCommonEdge( _PolyLine& LL, _PolyLine& LR );
void calcLayersHeight(const double totalThick,
vector<double>& heights);
@ -435,7 +440,8 @@ StdMeshers_ViscousLayers2D::Compute(SMESH_Mesh& theMesh,
theMesh.GetSubMesh( theFace )->GetComputeError() = error;
else if ( !pm )
pm.reset( new SMESH_ProxyMesh( theMesh ));
//pm.reset();
if ( getenv("ONLY_VL2D"))
pm.reset();
}
else
{
@ -667,30 +673,29 @@ bool _ViscousBuilder2D::makePolyLines()
while ( points[ iPnt ].normParam < lastNormPar )
++iPnt;
L._lastPntInd = iPnt;
L._lEdges.resize( L._lastPntInd - L._firstPntInd + 1 );
L._lEdges.resize( Max( 3, L._lastPntInd - L._firstPntInd + 1 )); // 3 edges minimum
// TODO: add more _LayerEdge's to strongly curved EDGEs
// in order not to miss collisions
Handle(Geom2d_Curve) pcurve = L._wire->Curve2d( L._edgeInd );
gp_Pnt2d uv; gp_Vec2d tangent;
const bool reverse = ( L._wire->Edge( iE ).Orientation() == TopAbs_REVERSED );
for ( int i = L._firstPntInd; i <= L._lastPntInd; ++i )
{
_LayerEdge& lEdge = L._lEdges[ i - L._firstPntInd ];
const double u = ( i == L._firstPntInd ? wire->FirstU(iE) : points[ i ].param );
pcurve->D1( u , uv, tangent );
tangent.Normalize();
if ( L._wire->Edge( iE ).Orientation() == TopAbs_REVERSED )
tangent.Reverse();
lEdge._uvOut = lEdge._uvIn = uv.XY();
lEdge._normal2D.SetCoord( -tangent.Y(), tangent.X() );
lEdge._ray.SetLocation( lEdge._uvOut );
lEdge._ray.SetDirection( lEdge._normal2D );
lEdge._isBlocked = false;
lEdge._length2D = 0;
setLayerEdgeData( lEdge, u, pcurve, reverse );
setLenRatio( lEdge, SMESH_TNodeXYZ( points[ i ].node ) );
}
if ( L._lastPntInd - L._firstPntInd + 1 < 3 ) // add 3d _LayerEdge in the middle
{
L._lEdges[2] = L._lEdges[1];
const double u = 0.5 * ( wire->FirstU(iE) + wire->LastU(iE) );
setLayerEdgeData( L._lEdges[1], u, pcurve, reverse );
gp_Pnt p = 0.5 * ( SMESH_TNodeXYZ( points[ L._firstPntInd ].node ) +
SMESH_TNodeXYZ( points[ L._lastPntInd ].node ));
setLenRatio( L._lEdges[1], p );
}
}
}
@ -726,6 +731,7 @@ bool _ViscousBuilder2D::makePolyLines()
_SegmentTree::box_type faceBndBox2D;
for ( iPoLine = 0; iPoLine < _polyLineVec.size(); ++iPoLine )
faceBndBox2D.Add( *_polyLineVec[ iPoLine]._segTree->getBox() );
double boxTol = 1e-3 * sqrt( faceBndBox2D.SquareExtent() );
//
if ( _thickness * maxLen2dTo3dRatio > sqrt( faceBndBox2D.SquareExtent() ) / 10 )
{
@ -735,11 +741,14 @@ bool _ViscousBuilder2D::makePolyLines()
for ( size_t iL1 = 0; iL1 < _polyLineVec.size(); ++iL1 )
{
_PolyLine& L1 = _polyLineVec[ iL1 ];
const _SegmentTree::box_type* boxL1 = L1._segTree->getBox();
_SegmentTree::box_type boxL1 = * L1._segTree->getBox();
boxL1.Enlarge( boxTol );
for ( size_t iL2 = iL1+1; iL2 < _polyLineVec.size(); ++iL2 )
{
_PolyLine& L2 = _polyLineVec[ iL2 ];
if ( boxL1->IsOut( *L2._segTree->getBox() ))
_SegmentTree::box_type boxL2 = * L2._segTree->getBox();
boxL2.Enlarge( boxTol );
if ( boxL1.IsOut( boxL2 ))
continue;
for ( size_t iLE = 1; iLE < L1._lEdges.size(); ++iLE )
{
@ -987,6 +996,30 @@ void _ViscousBuilder2D::adjustCommonEdge( _PolyLine& LL, _PolyLine& LR )
}
}
//================================================================================
/*!
* \brief initialize data of a _LayerEdge
*/
//================================================================================
void _ViscousBuilder2D::setLayerEdgeData( _LayerEdge& lEdge,
const double u,
Handle(Geom2d_Curve)& pcurve,
const bool reverse)
{
gp_Pnt2d uv; gp_Vec2d tangent;
pcurve->D1( u, uv, tangent );
tangent.Normalize();
if ( reverse )
tangent.Reverse();
lEdge._uvOut = lEdge._uvIn = uv.XY();
lEdge._normal2D.SetCoord( -tangent.Y(), tangent.X() );
lEdge._ray.SetLocation( lEdge._uvOut );
lEdge._ray.SetDirection( lEdge._normal2D );
lEdge._isBlocked = false;
lEdge._length2D = 0;
}
//================================================================================
/*!
* \brief Compute and set _LayerEdge::_len2dTo3dRatio
@ -1088,6 +1121,57 @@ bool _ViscousBuilder2D::inflate()
// if (nbSteps == 0 )
// return error("failed at the very first inflation step");
// remove _LayerEdge's of one line intersecting with each other
for ( size_t iL = 0; iL < _polyLineVec.size(); ++iL )
{
_PolyLine& L = _polyLineVec[ iL ];
if ( !L._advancable ) continue;
// replace an inactive (1st) _LayerEdge with an active one of a neighbour _PolyLine
if ( /*!L._leftLine->_advancable &&*/ L.IsCommonEdgeShared( *L._leftLine ) ) {
L._lEdges[0] = L._leftLine->_lEdges.back();
}
if ( !L._rightLine->_advancable && L.IsCommonEdgeShared( *L._rightLine ) ) {
L._lEdges.back() = L._rightLine->_lEdges[0];
}
_SegmentIntersection intersection;
for ( int isR = 0; ( isR < 2 && L._lEdges.size() > 2 ); ++isR )
{
int nbRemove = 0, deltaIt = isR ? -1 : +1;
_PolyLine::TEdgeIterator eIt = isR ? L._lEdges.end()-1 : L._lEdges.begin();
if ( eIt->_length2D == 0 ) continue;
_Segment seg1( eIt->_uvOut, eIt->_uvIn );
for ( eIt += deltaIt; nbRemove < L._lEdges.size()-1; eIt += deltaIt )
{
_Segment seg2( eIt->_uvOut, eIt->_uvIn );
if ( !intersection.Compute( seg1, seg2 ))
break;
++nbRemove;
}
if ( nbRemove > 0 ) {
if ( nbRemove == L._lEdges.size()-1 ) // 1st and last _LayerEdge's intersect
{
--nbRemove;
_LayerEdge& L0 = L._lEdges.front();
_LayerEdge& L1 = L._lEdges.back();
L0._length2D *= intersection._param1 * 0.5;
L1._length2D *= intersection._param2 * 0.5;
L0._uvIn = L0._uvOut + L0._normal2D * L0._length2D;
L1._uvIn = L1._uvOut + L1._normal2D * L1._length2D;
if ( L.IsCommonEdgeShared( *L._leftLine ))
L._leftLine->_lEdges.back() = L0;
}
if ( isR )
L._lEdges.erase( L._lEdges.end()-nbRemove-1,
L._lEdges.end()-nbRemove );
else
L._lEdges.erase( L._lEdges.begin()+1,
L._lEdges.begin()+1+nbRemove );
}
}
}
return true;
}
@ -1293,7 +1377,7 @@ bool _ViscousBuilder2D::shrink()
const double len2D = pcurve->Value(uf).Distance( pcurve->Value(uf+len1D));
double len1dTo2dRatio = len1D / len2D;
// Get length of existing segments (from edge start to a node) and their nodes
// Get length of existing segments (from an edge start to a node) and their nodes
const vector<UVPtStruct>& points = L._wire->GetUVPtStruct();
UVPtStructVec nodeDataVec( & points[ L._firstPntInd ],
& points[ L._lastPntInd + 1 ]);
@ -1340,7 +1424,8 @@ bool _ViscousBuilder2D::shrink()
// try to find length of advancement along L by intersecting L with
// an adjacent _Segment of L2
double length1D = 0, length2D = 0; //nearLE._length2D;
double& length2D = nearLE._length2D;
double length1D = 0;
sign = ( isR ^ edgeReversed ) ? -1. : 1.;
//pcurve->D1( u, uv, tangent );
@ -1376,6 +1461,7 @@ bool _ViscousBuilder2D::shrink()
* /
* L / */
length2D = L2->_lEdges[ iFSeg2 ]._length2D;
//if ( L2->_advancable ) continue;
}
}
else // L2 is advancable but in the face adjacent by L
@ -1385,6 +1471,8 @@ bool _ViscousBuilder2D::shrink()
_LayerEdge& neighborLE =
( isR ? L._leftLine->_lEdges.back() : L._rightLine->_lEdges.front() );
length2D = neighborLE._length2D;
if ( length2D == 0 )
length2D = _thickness * nearLE._len2dTo3dRatio;
}
}
@ -1393,7 +1481,7 @@ bool _ViscousBuilder2D::shrink()
double maxLen2D = maxLen3D * nearLE._len2dTo3dRatio;
if ( !length2D ) length2D = length1D / len1dTo2dRatio;
if ( Abs( length2D ) > maxLen2D )
length2D = maxLen2D * sign;
length2D = maxLen2D;
nearLE._uvIn = nearLE._uvOut + nearLE._normal2D * length2D;
u += length2D * len1dTo2dRatio * sign;
@ -1589,8 +1677,6 @@ bool _ViscousBuilder2D::refine()
_PolyLine& L = _polyLineVec[ iL ];
if ( !L._advancable ) continue;
//if ( L._leftLine->_advancable ) L._lEdges[0] = L._leftLine->_lEdges.back();
// replace an inactive (1st) _LayerEdge with an active one of a neighbour _PolyLine
size_t iLE = 0, nbLE = L._lEdges.size();
const bool leftEdgeShared = L.IsCommonEdgeShared( *L._leftLine );
@ -1606,30 +1692,6 @@ bool _ViscousBuilder2D::refine()
--nbLE;
}
// remove intersecting _LayerEdge's
_SegmentIntersection intersection;
for ( int isR = 0; ( isR < 2 && L._lEdges.size() > 2 ); ++isR )
{
int nbRemove = 0, deltaIt = isR ? -1 : +1;
_PolyLine::TEdgeIterator eIt = isR ? L._lEdges.end()-1 : L._lEdges.begin();
_Segment seg1( eIt->_uvOut, eIt->_uvIn );
for ( eIt += deltaIt; nbRemove < L._lEdges.size()-2; eIt += deltaIt )
{
_Segment seg2( eIt->_uvOut, eIt->_uvIn );
if ( !intersection.Compute( seg1, seg2 ))
break;
++nbRemove;
}
if ( nbRemove > 0 ) {
if ( isR )
L._lEdges.erase( L._lEdges.end()-nbRemove-1,
L._lEdges.end()-nbRemove );
else
L._lEdges.erase( L._lEdges.begin()+2,
L._lEdges.begin()+2+nbRemove );
}
}
// limit length of neighbour _LayerEdge's to avoid sharp change of layers thickness
vector< double > segLen( L._lEdges.size() );
segLen[0] = 0.0;
@ -1644,19 +1706,26 @@ bool _ViscousBuilder2D::refine()
size_t iF = 0, iL = L._lEdges.size()-1;
size_t *i = isR ? &iL : &iF;
//size_t iRef = *i;
gp_XY uvInPrev = L._lEdges[ *i ]._uvIn;
_LayerEdge* prevLE = & L._lEdges[ *i ];
double weight = 0;
for ( ++iF, --iL; iF < L._lEdges.size()-1; ++iF, --iL )
{
_LayerEdge& LE = L._lEdges[*i];
gp_XY tangent ( LE._normal2D.Y(), -LE._normal2D.X() );
weight += Abs( tangent * ( uvInPrev - LE._uvIn )) / segLen.back();
double proj = LE._normal2D * ( uvInPrev - LE._uvOut );
if ( LE._length2D < proj )
weight += 0.75 * ( 1 - weight ); // length decrease is more preferable
LE._length2D = weight * LE._length2D + ( 1 - weight ) * proj;
LE._uvIn = LE._uvOut + LE._normal2D * LE._length2D;
uvInPrev = LE._uvIn;
if ( prevLE->_length2D > 0 ) {
gp_XY tangent ( LE._normal2D.Y(), -LE._normal2D.X() );
weight += Abs( tangent * ( prevLE->_uvIn - LE._uvIn )) / segLen.back();
gp_XY prevTang = ( LE._uvOut - prevLE->_uvOut );
gp_XY prevNorm = gp_XY( -prevTang.Y(), prevTang.X() );
double prevProj = prevNorm * ( prevLE->_uvIn - prevLE->_uvOut );
if ( prevProj > 0 ) {
prevProj /= prevTang.Modulus();
if ( LE._length2D < prevProj )
weight += 0.75 * ( 1 - weight ); // length decrease is more preferable
LE._length2D = weight * LE._length2D + ( 1 - weight ) * prevProj;
LE._uvIn = LE._uvOut + LE._normal2D * LE._length2D;
}
}
prevLE = & LE;
}
}
@ -1735,7 +1804,7 @@ bool _ViscousBuilder2D::refine()
outerNodes.swap( innerNodes );
}
// faces between not shared _LayerEdge's
// faces between not shared _LayerEdge's (at concave VERTEX)
for ( int isR = 0; isR < 2; ++isR )
{
if ( isR ? rightEdgeShared : leftEdgeShared)
@ -1752,6 +1821,31 @@ bool _ViscousBuilder2D::refine()
const UVPtStruct& ptOnVertex = points[ isR ? L._lastPntInd : L._firstPntInd ];
_helper.AddFace( ptOnVertex.node, rNodes[ 0 ], lNodes[ 0 ]);
// update nodeDataVec of an adjacent _PolyLine
// int iAdjEdge = isR ? L._rightLine->_edgeInd : L._leftLine->_edgeInd;
// _ProxyMeshOfFace::_EdgeSubMesh* adjEdgeSM
// = getProxyMesh()->GetEdgeSubMesh( L._wire->EdgeID( iAdjEdge ));
// const UVPtStructVec& nodeDataVec = adjEdgeSM->GetUVPtStructVec();
// if ( !nodeDataVec.empty() )
// {
// UVPtStruct ptOnVertex;
// _LayerEdge& LE = isR ? L._lEdges.back() : L._lEdges.front();
// ptOnVertex.u = LE._uvRefined.back().X();
// ptOnVertex.v = LE._uvRefined.back().Y();
// ptOnVertex.node = isR ? L._rightNodes.back() : L._leftNodes.back();
// ptOnVertex.param = isR ? L._wire->FirstU( iAdjEdge ) :L._wire->LastU( iAdjEdge );
// ptOnVertex.normParam = isR ? 1 : 0;
// ptOnVertex.x = ptOnVertex.normParam;
// ptOnVertex.y = ptOnVertex.normParam;
// int iN = isR ? _hyp->GetNumberLayers() : 0;
// int nbN = nodeDataVec.size() - ( isR ? 0 : _hyp->GetNumberLayers() );
// UVPtStructVec newNodeData( nodeDataVec.begin() + iN,
// nodeDataVec.begin() + nbN );
// newNodeData.insert( isR ? newNodeData.begin() : newNodeData.end(), ptOnVertex );
// adjEdgeSM->SetUVPtStructVec( newNodeData );
// }
}
// Fill the _ProxyMeshOfFace