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

  Program:   Visualization Toolkit
  Module:    vtkDataSet.cxx
  Language:  C++
  Date:      $Date$
  Version:   $Revision$


Copyright (c) 1993-2000 Ken Martin, Will Schroeder, Bill Lorensen 
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

 * Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.

 * Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

 * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names
   of any contributors may be used to endorse or promote products derived
   from this software without specific prior written permission.

 * Modified source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

=========================================================================*/
//
// DataSet methods
//
#include <math.h>
#include "vtkDataSet.h"
#include "vtkSource.h"

// Constructor with default bounds (0,1, 0,1, 0,1).
vtkDataSet::vtkDataSet ()
{
  this->Bounds[0] = 0.0;
  this->Bounds[1] = 1.0;
  this->Bounds[2] = 0.0;
  this->Bounds[3] = 1.0;
  this->Bounds[4] = 0.0;
  this->Bounds[5] = 1.0;

  this->PointData = vtkPointData::New();
  this->CellData = vtkCellData::New();
}

vtkDataSet::~vtkDataSet ()
{
  this->PointData->Delete();
  this->CellData->Delete();
}

// Copy constructor.
vtkDataSet::vtkDataSet (const vtkDataSet& ds) :
PointData(ds.PointData)
{
  for (int i=0; i < 6; i++)
    {
    this->Bounds[i] = ds.Bounds[i];
    }
  this->ReleaseDataFlag = ds.ReleaseDataFlag;
}

void vtkDataSet::Initialize()
{
  // We don't modify ourselves because the "ReleaseData" methods depend upon
  // no modification when initialized.
  vtkDataObject::Initialize();

  this->CellData->Initialize();
  this->PointData->Initialize();
}

// Compute the data bounding box from data points.
void vtkDataSet::ComputeBounds()
{
  int i, j;
  float *x;

  if ( this->GetMTime() > this->ComputeTime )
    {
    this->Bounds[0] = this->Bounds[2] = this->Bounds[4] =  VTK_LARGE_FLOAT;
    this->Bounds[1] = this->Bounds[3] = this->Bounds[5] = -VTK_LARGE_FLOAT;
    for (i=0; i<this->GetNumberOfPoints(); i++)
      {
      x = this->GetPoint(i);
      for (j=0; j<3; j++)
        {
        if ( x[j] < this->Bounds[2*j] )
          {
          this->Bounds[2*j] = x[j];
          }
        if ( x[j] > this->Bounds[2*j+1] )
          {
          this->Bounds[2*j+1] = x[j];
          }
        }
      }

    this->ComputeTime.Modified();
    }
}

void vtkDataSet::GetScalarRange(float range[2])
{
  vtkScalars *ptScalars, *cellScalars;
  ptScalars = this->PointData->GetScalars();
  cellScalars = this->CellData->GetScalars();
  
  if ( ptScalars && cellScalars)
    {
    float r1[2], r2[2];
    ptScalars->GetRange(r1);
    cellScalars->GetRange(r2);
    range[0] = (r1[0] < r2[0] ? r1[0] : r2[0]);
    range[1] = (r1[1] > r2[1] ? r1[1] : r2[1]);
    }
  else if ( ptScalars )
    {
    ptScalars->GetRange(range);
    }
  else if ( cellScalars )
    {
    cellScalars->GetRange(range);
    }
  else
    {
    range[0] = 0.0;
    range[1] = 1.0;
    }
}

float *vtkDataSet::GetScalarRange()
{
  this->GetScalarRange(this->ScalarRange);
  return this->ScalarRange;
}

// Return a pointer to the geometry bounding box in the form
// (xmin,xmax, ymin,ymax, zmin,zmax).
float *vtkDataSet::GetBounds()
{
  this->ComputeBounds();
  return this->Bounds;
}
  
void vtkDataSet::GetBounds(float bounds[6])
{
  this->ComputeBounds();
  for (int i=0; i<6; i++)
    {
    bounds[i] = this->Bounds[i];
    }
}
  
// Get the center of the bounding box.
float *vtkDataSet::GetCenter()
{
  this->ComputeBounds();
  for (int i=0; i<3; i++)
    {
    this->Center[i] = (this->Bounds[2*i+1] + this->Bounds[2*i]) / 2.0;
    }
  return this->Center;
}

void vtkDataSet::GetCenter(float center[3])
{
  this->ComputeBounds();
  for (int i=0; i<3; i++)
    {
    center[i] = (this->Bounds[2*i+1] + this->Bounds[2*i]) / 2.0;
    }
}
  
// Return the length of the diagonal of the bounding box.
float vtkDataSet::GetLength()
{
  double diff, l=0.0;
  int i;

  this->ComputeBounds();
  for (i=0; i<3; i++)
    {
    diff = this->Bounds[2*i+1] - this->Bounds[2*i];
    l += diff * diff;
    }
 
  return (float)sqrt(l);
}

unsigned long int vtkDataSet::GetMTime()
{
  unsigned long mtime, result;
  
  result = vtkDataObject::GetMTime();
  if (this->Source)
    {
    mtime = this->Source->GetMTime();
    result = ( mtime > result ? mtime : result );
    }
  
  mtime = this->PointData->GetMTime();
  result = ( mtime > result ? mtime : result );

  mtime = this->CellData->GetMTime();
  return ( mtime > result ? mtime : result );
}

vtkCell *vtkDataSet::FindAndGetCell (float x[3], vtkCell *cell, int cellId, 
                                     float tol2, int& subId,
                                     float pcoords[3], float *weights)
{
  int newCell = this->FindCell(x,cell,cellId,tol2,subId,pcoords,weights);
  if (newCell >= 0 )
    {
    cell = this->GetCell (newCell);
    }
  else
    {
    return NULL;
    }
  return cell;
}

void vtkDataSet::GetCellNeighbors(int cellId, vtkIdList *ptIds,
                                  vtkIdList *cellIds)
{
  int i, numPts;
  vtkIdList *otherCells = vtkIdList::New();
  otherCells->Allocate(VTK_CELL_SIZE);

  // load list with candidate cells, remove current cell
  this->GetPointCells(ptIds->GetId(0), cellIds);
  cellIds->DeleteId(cellId);

  // now perform multiple intersections on list
  if ( cellIds->GetNumberOfIds() > 0 )
    {
    for ( numPts=ptIds->GetNumberOfIds(), i=1; i < numPts; i++)
      {
      this->GetPointCells(ptIds->GetId(i), otherCells);
      cellIds->IntersectWith(*otherCells);
      }
    }
  
  otherCells->Delete();
}

void vtkDataSet::GetCellTypes(vtkCellTypes *types)
{
  int cellId, numCells=this->GetNumberOfCells();
  unsigned char type;

  types->Reset();
  for (cellId=0; cellId < numCells; cellId++)
    {
    type = this->GetCellType(cellId);
    if ( ! types->IsType(type) )
      {
      types->InsertNextType(type);
      }
    }
}


// Default implementation. This is very slow way to compute this information.
// Subclasses should override this method for efficiency.
void vtkDataSet::GetCellBounds(int cellId, float bounds[6])
{
  vtkGenericCell *cell = vtkGenericCell::New();

  this->GetCell(cellId, cell);
  cell->GetBounds(bounds);

  cell->Delete();
}

void vtkDataSet::Squeeze()
{
  this->CellData->Squeeze();
  this->PointData->Squeeze();
}

unsigned long vtkDataSet::GetActualMemorySize()
{
  unsigned long size=this->vtkDataObject::GetActualMemorySize();
  size += this->PointData->GetActualMemorySize();
  size += this->CellData->GetActualMemorySize();
  return size;
}

void vtkDataSet::PrintSelf(ostream& os, vtkIndent indent)
{
  float *bounds;

  vtkDataObject::PrintSelf(os,indent);

  os << indent << "Number Of Points: " << this->GetNumberOfPoints() << "\n";
  os << indent << "Number Of Cells: " << this->GetNumberOfCells() << "\n";

  os << indent << "Cell Data:\n";
  this->CellData->PrintSelf(os,indent.GetNextIndent());

  os << indent << "Point Data:\n";
  this->PointData->PrintSelf(os,indent.GetNextIndent());

  bounds = this->GetBounds();
  os << indent << "Bounds: \n";
  os << indent << "  Xmin,Xmax: (" <<bounds[0] << ", " << bounds[1] << ")\n";
  os << indent << "  Ymin,Ymax: (" <<bounds[2] << ", " << bounds[3] << ")\n";
  os << indent << "  Zmin,Zmax: (" <<bounds[4] << ", " << bounds[5] << ")\n";
  os << indent << "Compute Time: " <<this->ComputeTime.GetMTime() << "\n";
  os << indent << "Release Data: " << (this->ReleaseDataFlag ? "On\n" : "Off\n");
}

