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vtkAMRCutPlane.cxx
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vtkAMRCutPlane.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkAMRCutPlane.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkAMRCutPlane.h"
#include "vtkObjectFactory.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkMultiBlockDataSet.h"
#include "vtkCompositeDataPipeline.h"
#include "vtkMultiProcessController.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkIndent.h"
#include "vtkPlane.h"
#include "vtkAMRUtilities.h"
#include "vtkUniformGrid.h"
#include "vtkCutter.h"
#include "vtkUnstructuredGrid.h"
#include "vtkIdList.h"
#include "vtkDoubleArray.h"
#include "vtkPointData.h"
#include "vtkCellData.h"
#include "vtkCell.h"
#include "vtkCellArray.h"
#include "vtkPoints.h"
#include "vtkOverlappingAMR.h"
#include "vtkPointData.h"
#include "vtkCellData.h"
#include <cassert>
#include <algorithm>
vtkStandardNewMacro(vtkAMRCutPlane);
//------------------------------------------------------------------------------
vtkAMRCutPlane::vtkAMRCutPlane()
{
this->SetNumberOfInputPorts( 1 );
this->SetNumberOfOutputPorts( 1 );
this->LevelOfResolution = 0;
this->initialRequest = true;
for( int i=0; i < 3; ++i )
{
this->Center[i] = 0.0;
this->Normal[i] = 0.0;
}
this->Controller = vtkMultiProcessController::GetGlobalController();
this->UseNativeCutter = 1;
}
//------------------------------------------------------------------------------
vtkAMRCutPlane::~vtkAMRCutPlane()
{
this->BlocksToLoad.clear();
}
//------------------------------------------------------------------------------
void vtkAMRCutPlane::PrintSelf( std::ostream &oss, vtkIndent indent )
{
this->Superclass::PrintSelf( oss, indent );
oss << indent << "LevelOfResolution: "
<< this->LevelOfResolution << endl;
oss << indent << "UseNativeCutter: "
<< this->UseNativeCutter << endl;
oss << indent << "Controller: "
<< this->Controller << endl;
oss << indent << "Center: ";
for( int i=0; i < 3; ++i )
{
oss << this->Center[i ] << " ";
}
oss << endl;
oss << indent << "Normal: ";
for( int i=0; i < 3; ++i )
{
oss << this->Normal[i] << " ";
}
oss << endl;
}
//------------------------------------------------------------------------------
int vtkAMRCutPlane::FillInputPortInformation(
int vtkNotUsed(port), vtkInformation *info )
{
assert( "pre: information object is NULL!" && (info != NULL) );
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(),"vtkOverlappingAMR");
return 1;
}
//------------------------------------------------------------------------------
int vtkAMRCutPlane::FillOutputPortInformation(
int vtkNotUsed(port), vtkInformation *info )
{
assert( "pre: information object is NULL!" && (info != NULL) );
info->Set(vtkDataObject::DATA_TYPE_NAME(), "vtkMultiBlockDataSet" );
return 1;
}
//------------------------------------------------------------------------------
int vtkAMRCutPlane::RequestInformation(
vtkInformation* vtkNotUsed(rqst), vtkInformationVector** inputVector,
vtkInformationVector* vtkNotUsed(outputVector) )
{
this->BlocksToLoad.clear();
vtkInformation *input = inputVector[0]->GetInformationObject(0);
assert( "pre: input information object is NULL" && (input != NULL) );
if( input->Has(vtkCompositeDataPipeline::COMPOSITE_DATA_META_DATA() ) )
{
vtkOverlappingAMR *metadata =
vtkOverlappingAMR::SafeDownCast(
input->Get(vtkCompositeDataPipeline::COMPOSITE_DATA_META_DATA()));
vtkPlane *cutPlane = this->GetCutPlane( metadata );
assert( "Cut plane is NULL" && (cutPlane != NULL) );
this->ComputeAMRBlocksToLoad(cutPlane, metadata);
cutPlane->Delete();
}
this->Modified();
return 1;
}
//------------------------------------------------------------------------------
int vtkAMRCutPlane::RequestUpdateExtent(
vtkInformation* vtkNotUsed(rqst), vtkInformationVector** inputVector,
vtkInformationVector* vtkNotUsed(outputVector) )
{
vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
assert( "pre: inInfo is NULL" && (inInfo != NULL) );
inInfo->Set(
vtkCompositeDataPipeline::UPDATE_COMPOSITE_INDICES(),
&this->BlocksToLoad[0], static_cast<int>(this->BlocksToLoad.size()));
return 1;
}
//------------------------------------------------------------------------------
int vtkAMRCutPlane::RequestData(
vtkInformation* vtkNotUsed(rqst), vtkInformationVector** inputVector,
vtkInformationVector* outputVector )
{
// STEP 0: Get input object
vtkInformation *input = inputVector[0]->GetInformationObject( 0 );
assert( "pre: input information object is NULL" && (input != NULL) );
vtkOverlappingAMR *inputAMR=
vtkOverlappingAMR::SafeDownCast(
input->Get( vtkDataObject::DATA_OBJECT() ) );
assert( "pre: input AMR dataset is NULL!" && (inputAMR != NULL) );
// STEP 1: Get output object
vtkInformation *output = outputVector->GetInformationObject( 0 );
assert( "pre: output information is NULL" && (output != NULL) );
vtkMultiBlockDataSet *mbds=
vtkMultiBlockDataSet::SafeDownCast(
output->Get( vtkDataObject::DATA_OBJECT() ) );
assert( "pre: output multi-block dataset is NULL" && (mbds != NULL) );
if( this->IsAMRData2D( inputAMR ) )
{
// Return an empty multi-block, we cannot cut a 2-D dataset
return 1;
}
vtkPlane *cutPlane = this->GetCutPlane( inputAMR );
assert("pre: cutPlane should not be NULL!" && (cutPlane != NULL) );
unsigned int blockIdx = 0;
unsigned int level = 0;
for( ; level < inputAMR->GetNumberOfLevels(); ++level )
{
unsigned int dataIdx = 0;
for( ; dataIdx < inputAMR->GetNumberOfDataSets( level ); ++dataIdx )
{
vtkUniformGrid *grid = inputAMR->GetDataSet( level, dataIdx );
if( this->UseNativeCutter == 1 )
{
if( grid != NULL )
{
vtkCutter *myCutter = vtkCutter::New();
myCutter->SetInputData( grid );
myCutter->SetCutFunction( cutPlane );
myCutter->Update();
mbds->SetBlock( blockIdx, myCutter->GetOutput( ) );
++blockIdx;
myCutter->Delete();
}
else
{
mbds->SetBlock(blockIdx,NULL);
++blockIdx;
}
}
else
{
if( grid != NULL )
{
this->CutAMRBlock( cutPlane, blockIdx, grid, mbds );
++blockIdx;
}
else
{
mbds->SetBlock(blockIdx,NULL);
++blockIdx;
}
}
} // END for all data
} // END for all levels
cutPlane->Delete();
return 1;
}
//------------------------------------------------------------------------------
void vtkAMRCutPlane::CutAMRBlock(
vtkPlane *cutPlane,
unsigned int blockIdx, vtkUniformGrid *grid, vtkMultiBlockDataSet *output )
{
assert("pre: multiblock output object is NULL!" && (output != NULL));
assert("pre: grid is NULL" && (grid != NULL) );
vtkUnstructuredGrid *mesh = vtkUnstructuredGrid::New();
vtkPoints *meshPts = vtkPoints::New();
meshPts->SetDataTypeToDouble();
vtkCellArray *cells = vtkCellArray::New();
// Maps points from the input grid to the output grid
std::map< vtkIdType, vtkIdType > grdPntMapping;
std::vector< vtkIdType > extractedCells;
vtkIdType cellIdx = 0;
for( ; cellIdx < grid->GetNumberOfCells(); ++cellIdx )
{
if( grid->IsCellVisible( cellIdx ) &&
this->PlaneIntersectsCell( cutPlane, grid->GetCell(cellIdx) ) )
{
extractedCells.push_back( cellIdx );
this->ExtractCellFromGrid(
grid,grid->GetCell(cellIdx),grdPntMapping,meshPts,cells );
} // END if
} // END for all cells
// Sanity checks
assert("post: Number of mesh points should match map size!" &&
(static_cast<int>(grdPntMapping.size())==meshPts->GetNumberOfPoints()));
assert("post: Number of cells mismatch"&&
(cells->GetNumberOfCells()==static_cast<int>(extractedCells.size())));
// Insert the points
mesh->SetPoints( meshPts );
meshPts->Delete();
std::vector<int> types;
if( grid->GetDataDimension() == 3 )
{
types.resize( cells->GetNumberOfCells(), VTK_VOXEL );
}
else
{
vtkErrorMacro("Cannot cut a grid of dimension=" << grid->GetDataDimension());
output->SetBlock( blockIdx, NULL );
return;
}
// Insert the cells
mesh->SetCells( &types[0], cells );
cells->Delete();
// Extract fields
this->ExtractPointDataFromGrid(
grid,grdPntMapping,mesh->GetNumberOfPoints(),mesh->GetPointData());
this->ExtractCellDataFromGrid(
grid,extractedCells,mesh->GetCellData());
output->SetBlock( blockIdx, mesh );
mesh->Delete();
grdPntMapping.clear();
extractedCells.clear();
}
//------------------------------------------------------------------------------
void vtkAMRCutPlane::ExtractCellFromGrid(
vtkUniformGrid *grid,
vtkCell* cell, std::map< vtkIdType, vtkIdType >& grdPntMapping,
vtkPoints *nodes,
vtkCellArray *cells)
{
assert( "pre: grid is NULL" && (grid != NULL) );
assert( "pre: cell is NULL" && (cell != NULL) );
assert( "pre: cells is NULL" && (cells != NULL) );
cells->InsertNextCell( cell->GetNumberOfPoints() );
vtkIdType nodeIdx = 0;
for( ; nodeIdx < cell->GetNumberOfPoints(); ++nodeIdx )
{
// Get the point ID w.r.t. the grid
vtkIdType meshPntIdx = cell->GetPointId( nodeIdx );
assert( "pre: mesh point ID should within grid range point ID" &&
(meshPntIdx < grid->GetNumberOfPoints()));
if( grdPntMapping.find( meshPntIdx ) != grdPntMapping.end() )
{
// Point already exists in nodes
cells->InsertCellPoint( grdPntMapping[meshPntIdx] );
}
else
{
// Push point to the end of the list
vtkIdType nidx = nodes->GetNumberOfPoints();
double *pnt = grid->GetPoint(meshPntIdx);
nodes->InsertPoint( nidx, pnt );
assert("post: number of points should be increased by 1" &&
(nodes->GetNumberOfPoints()==(nidx+1)));
grdPntMapping[ meshPntIdx ] = nidx;
cells->InsertCellPoint( nidx );
}
} // END for all nodes
}
//------------------------------------------------------------------------------
void vtkAMRCutPlane::ExtractPointDataFromGrid(
vtkUniformGrid *grid,
std::map<vtkIdType,vtkIdType>& gridPntMapping,
vtkIdType NumNodes,
vtkPointData *PD)
{
assert("pre: grid is NULL!" && (grid != NULL) );
assert("pre: target point data is NULL!" && (PD != NULL) );
if( (grid->GetPointData()->GetNumberOfArrays()==0) ||
(gridPntMapping.size() == 0))
{
// Nothing to extract short-circuit here
return;
}
vtkPointData *GPD = grid->GetPointData();
for( int fieldArray=0; fieldArray < GPD->GetNumberOfArrays(); ++fieldArray)
{
vtkDataArray *sourceArray = GPD->GetArray(fieldArray);
int dataType = sourceArray->GetDataType();
vtkDataArray *array = vtkDataArray::CreateDataArray( dataType );
assert( "pre: failed to create array!" && (array != NULL) );
array->SetName(sourceArray->GetName());
array->SetNumberOfComponents(sourceArray->GetNumberOfComponents());
array->SetNumberOfTuples(NumNodes);
// Copy tuples from source array
std::map<vtkIdType,vtkIdType>::iterator iter = gridPntMapping.begin();
for( ; iter != gridPntMapping.end(); ++iter )
{
vtkIdType srcIdx = iter->first;
vtkIdType targetIdx = iter->second;
assert( "pre: source node index is out-of-bounds" &&
(srcIdx >= 0) && (srcIdx < grid->GetNumberOfPoints()) );
assert( "pre: target node index is out-of-bounds" &&
(targetIdx >=0) && (targetIdx < NumNodes) );
array->SetTuple( targetIdx, srcIdx, sourceArray );
} // END for all extracted nodes
PD->AddArray( array );
array->Delete();
} // END for all arrays
}
//------------------------------------------------------------------------------
void vtkAMRCutPlane::ExtractCellDataFromGrid(
vtkUniformGrid *grid,
std::vector<vtkIdType>& cellIdxList,
vtkCellData *CD)
{
assert("pre: grid is NULL!" && (grid != NULL) );
assert("pre: target cell data is NULL!" && (CD != NULL) );
if( (grid->GetCellData()->GetNumberOfArrays()==0) ||
(cellIdxList.size()==0) )
{
// Nothing to extract short-circuit here
return;
}
int NumCells = static_cast<int>(cellIdxList.size());
vtkCellData *GCD = grid->GetCellData();
for( int fieldArray=0; fieldArray < GCD->GetNumberOfArrays(); ++fieldArray)
{
vtkDataArray *sourceArray = GCD->GetArray(fieldArray);
int dataType = sourceArray->GetDataType();
vtkDataArray *array = vtkDataArray::CreateDataArray(dataType);
assert( "pre: failed to create array!" && (array != NULL) );
array->SetName(sourceArray->GetName());
array->SetNumberOfComponents(sourceArray->GetNumberOfComponents());
array->SetNumberOfTuples(NumCells);
// Copy tuples from source array
for( int i=0; i < NumCells; ++i )
{
vtkIdType cellIdx = cellIdxList[ i ];
assert( "pre: cell index is out-of-bounds!" &&
(cellIdx >= 0) && (cellIdx < grid->GetNumberOfCells()) );
array->SetTuple(i,cellIdx,sourceArray);
} // END for all extracted cells
CD->AddArray( array );
array->Delete();
} // END for all arrays
}
//------------------------------------------------------------------------------
vtkPlane* vtkAMRCutPlane::GetCutPlane( vtkOverlappingAMR *metadata )
{
assert( "pre: metadata is NULL" && (metadata != NULL) );
vtkPlane *pl = vtkPlane::New();
double bounds[6];
metadata->GetBounds(bounds);
// Get global bounds
double minBounds[3] = {bounds[0],bounds[2],bounds[4]};
double maxBounds[3] = {bounds[1],bounds[3],bounds[5]};
this->InitializeCenter( minBounds, maxBounds );
pl->SetNormal( this->Normal );
pl->SetOrigin( this->Center );
return( pl );
}
//------------------------------------------------------------------------------
void vtkAMRCutPlane::ComputeAMRBlocksToLoad(
vtkPlane* p, vtkOverlappingAMR *m)
{
assert( "pre: Plane object is NULL" && (p != NULL) );
assert( "pre: metadata is NULL" && (m != NULL) );
// Store A,B,C,D from the plane equation
double plane[4];
plane[0] = p->GetNormal()[0];
plane[1] = p->GetNormal()[1];
plane[2] = p->GetNormal()[2];
plane[3] = p->GetNormal()[0]*p->GetOrigin()[0] +
p->GetNormal()[1]*p->GetOrigin()[1] +
p->GetNormal()[2]*p->GetOrigin()[2];
double bounds[6];
int NumLevels = m->GetNumberOfLevels();
int maxLevelToLoad =
(this->LevelOfResolution < NumLevels )?
this->LevelOfResolution : NumLevels;
unsigned int level = 0;
for( ; level <= static_cast<unsigned int>(maxLevelToLoad); ++level )
{
unsigned int dataIdx = 0;
for( ; dataIdx < m->GetNumberOfDataSets( level ); ++dataIdx )
{
m->GetBounds( level, dataIdx, bounds);
if( this->PlaneIntersectsAMRBox( plane, bounds ) )
{
unsigned int amrGridIdx = m->GetCompositeIndex(level,dataIdx);
this->BlocksToLoad.push_back( amrGridIdx );
}
} // END for all data
} // END for all levels
std::sort( this->BlocksToLoad.begin(), this->BlocksToLoad.end() );
}
//------------------------------------------------------------------------------
void vtkAMRCutPlane::InitializeCenter( double min[3], double max[3] )
{
if( !this->initialRequest )
{
return;
}
this->Center[0] = 0.5*( max[0]-min[0] );
this->Center[1] = 0.5*( max[1]-min[1] );
this->Center[2] = 0.5*( max[2]-min[2] );
this->initialRequest = false;
}
//------------------------------------------------------------------------------
bool vtkAMRCutPlane::PlaneIntersectsCell( vtkPlane *pl, vtkCell *cell )
{
assert( "pre: plane is NULL" && (pl != NULL) );
assert( "pre: cell is NULL!" && (cell != NULL) );
return( this->PlaneIntersectsAMRBox( pl, cell->GetBounds() ) );
}
//------------------------------------------------------------------------------
bool vtkAMRCutPlane::PlaneIntersectsAMRBox(vtkPlane *pl, double bounds[6] )
{
assert( "pre: plane is NULL" && (pl != NULL) );
// Store A,B,C,D from the plane equation
double plane[4];
plane[0] = pl->GetNormal()[0];
plane[1] = pl->GetNormal()[1];
plane[2] = pl->GetNormal()[2];
plane[3] = pl->GetNormal()[0]*pl->GetOrigin()[0] +
pl->GetNormal()[1]*pl->GetOrigin()[1] +
pl->GetNormal()[2]*pl->GetOrigin()[2];
return( this->PlaneIntersectsAMRBox( plane,bounds) );
}
//------------------------------------------------------------------------------
bool vtkAMRCutPlane::PlaneIntersectsAMRBox( double plane[4], double bounds[6] )
{
bool lowPnt = false;
bool highPnt = false;
for( int i=0; i < 8; ++i )
{
// Get box coordinates
double x = ( i&1 ) ? bounds[1] : bounds[0];
double y = ( i&2 ) ? bounds[3] : bounds[2];
double z = ( i&3 ) ? bounds[5] : bounds[4];
// Plug-in coordinates to the plane equation
double v = plane[3] - plane[0]*x - plane[1]*y - plane[2]*z;
if( v == 0.0 ) // Point is on a plane
{
return true;
}
if( v < 0.0 )
{
lowPnt = true;
}
else
{
highPnt = true;
}
if( lowPnt && highPnt )
{
return true;
}
}
return false;
}
//------------------------------------------------------------------------------
bool vtkAMRCutPlane::IsAMRData2D( vtkOverlappingAMR *input )
{
assert( "pre: Input AMR dataset is NULL" && (input != NULL) );
if( input->GetGridDescription() != VTK_XYZ_GRID )
{
return true;
}
return false;
}