/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkInterpolateDataSetAttributes.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 "vtkInterpolateDataSetAttributes.h"

#include "vtkCellData.h"
#include "vtkDataSetCollection.h"
#include "vtkExecutive.h"
#include "vtkGarbageCollector.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkPolyData.h"
#include "vtkRectilinearGrid.h"
#include "vtkStructuredGrid.h"
#include "vtkStructuredPoints.h"
#include "vtkUnstructuredGrid.h"

vtkStandardNewMacro(vtkInterpolateDataSetAttributes);

// Create object with no input or output.
vtkInterpolateDataSetAttributes::vtkInterpolateDataSetAttributes()
{
  this->InputList = vtkDataSetCollection::New();

  this->T = 0.0;
}

vtkInterpolateDataSetAttributes::~vtkInterpolateDataSetAttributes()
{
  if (this->InputList)
    {
    this->InputList->Delete();
    this->InputList = NULL;
    }
}

vtkDataSetCollection *vtkInterpolateDataSetAttributes::GetInputList()
{
  int i;
  this->InputList->RemoveAllItems();

  for (i = 0; i < this->GetNumberOfInputConnections(0); i++)
    {
      this->InputList->AddItem(static_cast<vtkDataSet *>(this->GetExecutive()->GetInputData(0, i)));
    }
  return this->InputList;
}

// Interpolate the data
int vtkInterpolateDataSetAttributes::RequestData(
  vtkInformation *vtkNotUsed(request),
  vtkInformationVector **inputVector,
  vtkInformationVector *outputVector)
{
  // get the info object
  vtkInformation *outInfo = outputVector->GetInformationObject(0);

  // get the ouptut
  vtkDataSet *output = vtkDataSet::SafeDownCast(
    outInfo->Get(vtkDataObject::DATA_OBJECT()));

  vtkIdType numPts, numCells, i;
  int numInputs = this->GetNumberOfInputConnections(0);
  int lowDS, highDS;
  vtkDataSet *ds, *ds2;
  vtkPointData *outputPD = output->GetPointData();
  vtkCellData *outputCD = output->GetCellData();
  vtkPointData *inputPD, *input2PD;
  vtkCellData *inputCD, *input2CD;
  double t;

  if ( numInputs < 2 )
    {
    vtkErrorMacro(<< "Need at least two inputs to interpolate!");
    return 1;
    }  
  
  vtkDebugMacro(<<"Interpolating data...");

  // Check input and determine between which data sets the interpolation 
  // is to occur.
  if ( this->T > static_cast<double>(numInputs) )
    {
    vtkErrorMacro(<<"Bad interpolation parameter");
    return 1;
    }

  lowDS = static_cast<int>(this->T);
  if ( lowDS >= (numInputs-1) )
    {
    lowDS = numInputs - 2;
    }

  highDS = lowDS + 1;
  t = this->T - static_cast<double>(lowDS);
  if (t > 1.0)
    {
    t =1.0;
    }
  
  vtkInformation *dsInfo = inputVector[0]->GetInformationObject(lowDS);
  vtkInformation *ds2Info = inputVector[0]->GetInformationObject(highDS);
  ds = vtkDataSet::SafeDownCast(dsInfo->Get(vtkDataObject::DATA_OBJECT()));
  ds2 = vtkDataSet::SafeDownCast(ds2Info->Get(vtkDataObject::DATA_OBJECT()));

  numPts = ds->GetNumberOfPoints();
  numCells = ds->GetNumberOfCells();
  
  if ( numPts != ds2->GetNumberOfPoints() ||
       numCells != ds2->GetNumberOfCells() )
    {
    vtkErrorMacro(<<"Data sets not consistent!");
    return 1;
    }
  
  output->CopyStructure(ds);
  inputPD = ds->GetPointData();
  inputCD = ds->GetCellData();
  input2PD = ds2->GetPointData();
  input2CD = ds2->GetCellData();
    
  // Allocate the data set attributes
  outputPD->CopyAllOff();
  if ( inputPD->GetScalars() && input2PD->GetScalars() )
    {
    outputPD->CopyScalarsOn();
    }
  if ( inputPD->GetVectors() && input2PD->GetVectors() )
    {
    outputPD->CopyVectorsOn();
    }
  if ( inputPD->GetNormals() && input2PD->GetNormals() )
    {
    outputPD->CopyNormalsOn();
    }
  if ( inputPD->GetTCoords() && input2PD->GetTCoords() )
    {
    outputPD->CopyTCoordsOn();
    }
  if ( inputPD->GetTensors() && input2PD->GetTensors() )
    {
    outputPD->CopyTensorsOn();
    }
  // *TODO* Fix
  // if ( inputPD->GetFieldData() && input2PD->GetFieldData() )
  //{
  // outputPD->CopyFieldDataOn();
  //}
  outputPD->InterpolateAllocate(inputPD);

  outputCD->CopyAllOff();
  if ( inputCD->GetScalars() && input2CD->GetScalars() )
    {
    outputCD->CopyScalarsOn();
    }
  if ( inputCD->GetVectors() && input2CD->GetVectors() )
    {
    outputCD->CopyVectorsOn();
    }
  if ( inputCD->GetNormals() && input2CD->GetNormals() )
    {
    outputCD->CopyNormalsOn();
    }
  if ( inputCD->GetTCoords() && input2CD->GetTCoords() )
    {
    outputCD->CopyTCoordsOn();
    }
  if ( inputCD->GetTensors() && input2CD->GetTensors() )
    {
    outputCD->CopyTensorsOn();
    }
  // *TODO* Fix
  //if ( inputCD->GetFieldData() && input2CD->GetFieldData() )
  //{
  // outputCD->CopyFieldDataOn();
  //  }
  outputCD->InterpolateAllocate(inputCD);

 
  // Interpolate point data. We'll assume that it takes 50% of the time
  for ( i=0; i < numPts; i++ )
    {
    if ( ! (i % 10000) ) 
      {
      this->UpdateProgress(static_cast<double>(i)/numPts * 0.50);
      if (this->GetAbortExecute())
        {
        break;
        }
      }

    outputPD->InterpolateTime(inputPD, input2PD, i, t);
    }
  
  // Interpolate cell data. We'll assume that it takes 50% of the time
  for ( i=0; i < numCells; i++ )
    {
    if ( ! (i % 10000) ) 
      {
      this->UpdateProgress (0.5 + static_cast<double>(i)/numCells * 0.50);
      if (this->GetAbortExecute())
        {
        break;
        }
      }

    outputCD->InterpolateTime(inputCD, input2CD, i, t);
    }

  return 1;
}

int vtkInterpolateDataSetAttributes::FillInputPortInformation(
  int port, vtkInformation *info)
{
  if (!this->Superclass::FillInputPortInformation(port, info))
    {
    return 0;
    }
  info->Set(vtkAlgorithm::INPUT_IS_REPEATABLE(), 1);
  return 1;
}

void vtkInterpolateDataSetAttributes::PrintSelf(ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os,indent);

  os << indent << "T: " << this->T << endl;
}

//----------------------------------------------------------------------------
void
vtkInterpolateDataSetAttributes
::ReportReferences(vtkGarbageCollector* collector)
{
  this->Superclass::ReportReferences(collector);
  vtkGarbageCollectorReport(collector, this->InputList, "InputList");
}