From: eap Date: Mon, 25 Apr 2005 13:05:05 +0000 (+0000) Subject: "Clipping on Structured mesh". Store and provide access to info on structured mesh X-Git-Tag: V2_2_0_VISU_improvement_2005-05-27~44 X-Git-Url: http://git.salome-platform.org/gitweb/?a=commitdiff_plain;h=921708f7d302173e8ce26220b433e8a1b4a1cfa2;p=modules%2Fvisu.git "Clipping on Structured mesh". Store and provide access to info on structured mesh --- diff --git a/src/VISU_I/VISU_Result_i.cc b/src/VISU_I/VISU_Result_i.cc index 5b79dc1d..98a17f0d 100644 --- a/src/VISU_I/VISU_Result_i.cc +++ b/src/VISU_I/VISU_Result_i.cc @@ -52,12 +52,18 @@ #include #include +#include //#include //#include #include #include +#include + +#include +#include +#include using namespace VISU; using namespace std; @@ -209,7 +215,7 @@ CORBA::Boolean VISU::Result_i::BuildAll(){ try{ const VISU::TMeshMap& aMeshMap = myInput->GetMeshMap(); VISU::TMeshMap::const_iterator aMeshMapIter = aMeshMap.begin(); - for(; aMeshMapIter != aMeshMap.end(); aMeshMapIter++){ + for(; aMeshMapIter != aMeshMap.end(); aMeshMapIter++) { const string& aMeshName = aMeshMapIter->first; const VISU::PMesh aMesh = aMeshMapIter->second; const VISU::TMeshOnEntityMap& aMeshOnEntityMap = aMesh->myMeshOnEntityMap; @@ -680,3 +686,168 @@ VISU::Result_i::~Result_i() { } if(myInput) delete myInput; } + +//======================================================================= +//function : GetAxisInfo +//purpose : +//======================================================================= + +const vector< float >* Result_i::GetAxisInfo(const string& theMeshName, + TAxis theAxis, + gp_Dir& thePlaneNormal) +{ + const vector< float >* components = NULL; + + if ( theAxis < AXIS_X || theAxis > AXIS_Z ) { + MESSAGE(" Bad axis index " << theAxis ); + return components; + } + + map< string, TGridInfo >::iterator name_info; + name_info = myMeshName2GridInfoMap.find( theMeshName ); + TGridInfo * gInfo = 0; + + if ( name_info != myMeshName2GridInfoMap.end() ) + { + gInfo = & name_info->second; + } + else if ( myInput && IsPossible() && theAxis >= AXIS_X && theAxis <= AXIS_Z ) + { + // check presence of theMeshName + const VISU::TMeshMap& meshMap = myInput->GetMeshMap(); + if ( meshMap.find( theMeshName ) == meshMap.end() ) { + MESSAGE("No mesh named " << theMeshName ); + return components; + } + VISU_Convertor::TOutput* vtkMesh = myInput->GetMeshOnEntity (theMeshName, + CELL_ENTITY); + if ( !vtkMesh || vtkMesh->GetNumberOfCells() == 0 ) { + MESSAGE( "No cells in the mesh: " << theMeshName ); + return components; + } + + // define axis directions and min cell size in each direction + const int nbAxes = 3; + int iAx; + gp_Vec axDirs[ nbAxes ]; + float minSize[3] = { FLT_MAX, FLT_MAX, FLT_MAX }; + bool axesComputed = false; + for ( vtkIdType iCell = 0; iCell < vtkMesh->GetNumberOfCells(); ++iCell ) + { + vtkCell* cell = vtkMesh->GetCell( iCell ); + int nbPnt = cell->GetNumberOfPoints(); + if ( nbPnt != 8 ) + continue; + vtkPoints * points = cell->GetPoints(); + float* coords[ 4 ]; + coords[0] = points->GetPoint( 0 ); + coords[1] = points->GetPoint( 1 ); + coords[2] = points->GetPoint( 3 ); + coords[3] = points->GetPoint( 4 ); + gp_Pnt p0( coords[0][0], coords[0][1], coords[0][2] ); + for ( iAx = 0; iAx < nbAxes; ++iAx ) + { + float* coo = coords[ iAx + 1 ]; + gp_Pnt p( coo[0], coo[1], coo[2] ); + // min size + float size = p0.SquareDistance( p ); + if ( size > FLT_MIN && size < minSize[ iAx ] ) + minSize[ iAx ] = size; + // axis direction + if ( !axesComputed ) { + gp_Vec dir( p0, p ); + if ( dir.SquareMagnitude() <= DBL_MIN ) + break; + axDirs[ iAx ] = dir; + } + } + if ( iAx == nbAxes ) + axesComputed = true; + } + if ( !axesComputed ) { + MESSAGE("No good hexahedrons in the mesh: " << theMeshName ); + return components; + } + + // compute axes dirs + gInfo = & myMeshName2GridInfoMap[ theMeshName ]; + for ( iAx = 0; iAx < nbAxes; ++iAx ) + { + int iPrev = ( iAx == 0 ) ? 2 : iAx - 1; + int iNext = ( iAx == 2 ) ? 0 : iAx + 1; + gInfo->myAxis[ iAx ] = axDirs[ iPrev ] ^ axDirs[ iNext ]; + } + + // get and sort intermediate component values - projections of nodes + // on axis direction; define bnd box + set< float > comps[ 3 ]; + Bnd_Box box; + vtkPoints * points = vtkMesh->GetPoints(); + vtkIdType iP, nbP = vtkMesh->GetNumberOfPoints(); + for ( iP = 0; iP < nbP; ++iP ) + { + float* coo = points->GetPoint( iP ); + gp_Pnt p( coo[0], coo[1], coo[2] ); + box.Add( p ); + for ( iAx = 0; iAx < nbAxes; ++iAx ) { + const gp_Dir& dir = gInfo->myAxis[ iAx ]; + float dot = dir.XYZ() * p.XYZ(); + comps[ iAx ].insert( dot ); + } + } + + // find a range of projections of bnd box corners on each axis + float range[3], firstValue[3]; + double x[2],y[2],z[2]; + box.Get(x[0],y[0],z[0],x[1],y[1],z[1]); + for ( iAx = 0; iAx < nbAxes; ++iAx ) { + set< float > bndComps; + const gp_Dir& dir = gInfo->myAxis[ iAx ]; + for ( int iX = 0; iX < 2; ++iX ) { + for ( int iY = 0; iY < 2; ++iY ) { + for ( int iZ = 0; iZ < 2; ++iZ ) { + gp_Pnt p( x[ iX ], y[ iY ], z[ iZ ] ); + float dot = dir.XYZ() * p.XYZ(); + bndComps.insert( dot ); + } + } + } + firstValue[ iAx ] = *bndComps.begin(); + range[ iAx ] = *bndComps.rbegin() - *bndComps.begin(); + } + + // compute component values + for ( iAx = 0; iAx < nbAxes; ++iAx ) + { + list< float > values; + int nbVals = 0; + set< float >& comp = comps[ iAx ]; + set< float >::iterator val = comp.begin(); + float bnd = -1., rng = range[ iAx ], first = firstValue[ iAx ]; + float tol = 0.1 * sqrt( minSize[ iAx ]) / rng; + for ( ; val != comp.end(); ++val ) { + float value = ( *val - first ) / rng; + if ( value > bnd ) { + values.push_back( value ); + bnd = value + tol; + nbVals++; + } + } + // store values in gInfo + vector< float >& myComp = gInfo->myComponets[ iAx ]; + myComp.resize( nbVals ); + list< float >::iterator v = values.begin(); + for ( int i = 0; v != values.end(); ++v ) + myComp[ i++ ] = *v; + } + } + + // set return values + if ( gInfo ) + { + thePlaneNormal = gInfo->myAxis[ theAxis ]; + components = & gInfo->myComponets[ theAxis ]; + } + + return components; +} diff --git a/src/VISU_I/VISU_Result_i.hh b/src/VISU_I/VISU_Result_i.hh index f1135951..48fbd4b1 100644 --- a/src/VISU_I/VISU_Result_i.hh +++ b/src/VISU_I/VISU_Result_i.hh @@ -30,6 +30,10 @@ #include "VISUConfig.hh" #include "SALOME_GenericObj_i.hh" +#include + +#include + class VISU_Convertor; namespace VISU{ @@ -94,6 +98,21 @@ namespace VISU{ const SALOMEDS::SComponent_var& GetSComponent() const; std::string GetEntry(const std::string& theComment); + // Info on structured mesh contained in TInput + public: + typedef enum { AXIS_X = 0, AXIS_Y, AXIS_Z } TAxis; + const std::vector< float >* GetAxisInfo(const std::string& theMeshName, + TAxis theAxis, + gp_Dir& thePlaneNormal); + // Return i,j or k values and cutting plane normal for theAxis. + // In the case of any problems, return NULL pointer + private: + struct TGridInfo { + std::vector< float > myComponets[ 3 ]; + gp_Dir myAxis [ 3 ]; + }; + map< string, TGridInfo > myMeshName2GridInfoMap; + }; Result_var FindResult(SALOMEDS::SObject_ptr theSObject);