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

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

  Copyright (c) 1993-2002 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 "vtkMapper.h"

#include "vtkLookupTable.h"
#include "vtkDataSet.h"

vtkCxxRevisionMacro(vtkMapper, "1.100");

// Initialize static member that controls global immediate mode rendering
static int vtkMapperGlobalImmediateModeRendering = 0;

// Initialize static member that controls global coincidence resolution
static int vtkMapperGlobalResolveCoincidentTopology = VTK_RESOLVE_OFF;
static double vtkMapperGlobalResolveCoincidentTopologyZShift = 0.01;
static float vtkMapperGlobalResolveCoincidentTopologyPolygonOffsetFactor = 1.0;
static float vtkMapperGlobalResolveCoincidentTopologyPolygonOffsetUnits = 1.0;

// Construct with initial range (0,1).
vtkMapper::vtkMapper()
{
  this->Colors = NULL;

  this->LookupTable = NULL;

  this->ScalarVisibility = 1;
  this->ScalarRange[0] = 0.0; this->ScalarRange[1] = 1.0;
  this->UseLookupTableScalarRange = 0;

  this->ImmediateModeRendering = 0;

  this->ColorMode = VTK_COLOR_MODE_DEFAULT;
  this->ScalarMode = VTK_SCALAR_MODE_DEFAULT;
  
  this->Bounds[0] = this->Bounds[2] = this->Bounds[4] = -1.0;
  this->Bounds[1] = this->Bounds[3] = this->Bounds[5] = 1.0;
  this->Center[0] = this->Center[1] = this->Center[2] = 0.0;

  this->RenderTime = 0.0;
  
  strcpy(this->ArrayName, "");
  this->ArrayId = -1;
  this->ArrayComponent = 0;
  this->ArrayAccessMode = VTK_GET_ARRAY_BY_ID;
}

vtkMapper::~vtkMapper()
{
  if (this->LookupTable)
    {
    this->LookupTable->UnRegister(this);
    }
  if ( this->Colors != NULL )
    {
    this->Colors->UnRegister(this);
    }
}

// Get the bounds for the input of this mapper as 
// (Xmin,Xmax,Ymin,Ymax,Zmin,Zmax).
float *vtkMapper::GetBounds()
{
  static float bounds[] = {-1.0,1.0, -1.0,1.0, -1.0,1.0};

  if ( ! this->GetInput() ) 
    {
    return bounds;
    }
  else
    {
    this->Update();
    this->GetInput()->GetBounds(this->Bounds);
    return this->Bounds;
    }
}

vtkDataSet *vtkMapper::GetInput()
{
  if (this->NumberOfInputs < 1)
    {
    return NULL;
    }
  
  return (vtkDataSet *)(this->Inputs[0]);
}

void vtkMapper::SetGlobalImmediateModeRendering(int val)
{
  if (val == vtkMapperGlobalImmediateModeRendering)
    {
    return;
    }
  vtkMapperGlobalImmediateModeRendering = val;
}

int vtkMapper::GetGlobalImmediateModeRendering()
{
  return vtkMapperGlobalImmediateModeRendering;
}

void vtkMapper::SetResolveCoincidentTopology(int val)
{
  if (val == vtkMapperGlobalResolveCoincidentTopology)
    {
    return;
    }
  vtkMapperGlobalResolveCoincidentTopology = val;
}

int vtkMapper::GetResolveCoincidentTopology()
{
  return vtkMapperGlobalResolveCoincidentTopology;
}

void vtkMapper::SetResolveCoincidentTopologyToDefault()
{
  vtkMapperGlobalResolveCoincidentTopology = VTK_RESOLVE_OFF;
}

void vtkMapper::SetResolveCoincidentTopologyZShift(double val)
{
  if (val == vtkMapperGlobalResolveCoincidentTopologyZShift)
    {
    return;
    }
  vtkMapperGlobalResolveCoincidentTopologyZShift = val;
}

double vtkMapper::GetResolveCoincidentTopologyZShift()
{
  return vtkMapperGlobalResolveCoincidentTopologyZShift;
}

void vtkMapper::SetResolveCoincidentTopologyPolygonOffsetParameters(
                                            float factor, float units)
{
  if (factor == vtkMapperGlobalResolveCoincidentTopologyPolygonOffsetFactor &&
      units == vtkMapperGlobalResolveCoincidentTopologyPolygonOffsetUnits )
    {
    return;
    }
  vtkMapperGlobalResolveCoincidentTopologyPolygonOffsetFactor = factor;
  vtkMapperGlobalResolveCoincidentTopologyPolygonOffsetFactor = units;
}

void vtkMapper::GetResolveCoincidentTopologyPolygonOffsetParameters(
                           float& factor, float& units)
{
  factor = vtkMapperGlobalResolveCoincidentTopologyPolygonOffsetFactor;
  units = vtkMapperGlobalResolveCoincidentTopologyPolygonOffsetUnits;
}

// Overload standard modified time function. If lookup table is modified,
// then this object is modified as well.
unsigned long vtkMapper::GetMTime()
{
  //unsigned long mTime=this->MTime.GetMTime();
  unsigned long mTime=vtkAbstractMapper::GetMTime();
  unsigned long lutMTime;

  if ( this->LookupTable != NULL )
    {
    lutMTime = this->LookupTable->GetMTime();
    mTime = ( lutMTime > mTime ? lutMTime : mTime );
    }

  return mTime;
}

void vtkMapper::ShallowCopy(vtkAbstractMapper *mapper)
{
  vtkMapper *m = vtkMapper::SafeDownCast(mapper);
  if ( m != NULL )
    {
    this->SetLookupTable(m->GetLookupTable());
    this->SetScalarVisibility(m->GetScalarVisibility());
    this->SetScalarRange(m->GetScalarRange());
    this->SetColorMode(m->GetColorMode());
    this->SetScalarMode(m->GetScalarMode());
    this->SetImmediateModeRendering(m->GetImmediateModeRendering());
    this->SetUseLookupTableScalarRange(m->GetUseLookupTableScalarRange());
    if ( m->GetArrayAccessMode() == VTK_GET_ARRAY_BY_ID )
      {
      this->ColorByArrayComponent(m->GetArrayId(),m->GetArrayComponent());
      }
    else
      {
      this->ColorByArrayComponent(m->GetArrayName(),m->GetArrayComponent());
      }
    }

  // Now do superclass
  this->vtkAbstractMapper3D::ShallowCopy(mapper);

}

// a side effect of this is that this->Colors is also set
// to the return value
vtkUnsignedCharArray *vtkMapper::MapScalars(float alpha)
{
  // Get rid of old colors
  if ( this->Colors )
    {
    this->Colors->UnRegister(this);
    this->Colors = NULL;
    }
  
  // map scalars if necessary
  if ( this->ScalarVisibility )
    {
    vtkDataArray *scalars = vtkAbstractMapper::
      GetScalars(this->GetInput(), this->ScalarMode, this->ArrayAccessMode,
                 this->ArrayId, this->ArrayName, this->ArrayComponent);
    if ( scalars )
      {
      if ( scalars->GetLookupTable() )
        {
        this->SetLookupTable(scalars->GetLookupTable());
        }
      else
        {
        // make sure we have a lookup table
        if ( this->LookupTable == NULL )
          {
          this->CreateDefaultLookupTable();
          }
        this->LookupTable->Build();
        }
      if ( !this->UseLookupTableScalarRange )
        {
        this->LookupTable->SetRange(this->ScalarRange);
        }
      this->LookupTable->SetAlpha(alpha);
      this->Colors = this->LookupTable->
        MapScalars(scalars, this->ColorMode, this->ArrayComponent);
      // Consistent register and unregisters
      this->Colors->Register(this);
      this->Colors->Delete();
      }
    }

  return this->Colors;
}


void vtkMapper::SelectColorArray(int arrayNum)
{
  this->ColorByArrayComponent(arrayNum, -1);
}
 

void vtkMapper::SelectColorArray(const char* arrayName)
{
  this->ColorByArrayComponent(arrayName, -1);
}


void vtkMapper::ColorByArrayComponent(int arrayNum, int component)
{
  if (this->ArrayId == arrayNum && component == this->ArrayComponent &&
      this->ArrayAccessMode == VTK_GET_ARRAY_BY_ID)
    {
    return;
    }
  this->Modified();
  
  this->ArrayId = arrayNum;
  this->ArrayComponent = component;
  this->ArrayAccessMode = VTK_GET_ARRAY_BY_ID;
}

void vtkMapper::ColorByArrayComponent(const char* arrayName, int component)
{
  if (!arrayName || 
      ( strcmp(this->ArrayName, arrayName) == 0 &&
        component == this->ArrayComponent &&
        this->ArrayAccessMode == VTK_GET_ARRAY_BY_ID ))
    {
    return;
    }
  this->Modified();
  
  strcpy(this->ArrayName, arrayName);
  this->ArrayComponent = component;
  this->ArrayAccessMode = VTK_GET_ARRAY_BY_NAME;
}

// Specify a lookup table for the mapper to use.
void vtkMapper::SetLookupTable(vtkScalarsToColors *lut)
{
  if ( this->LookupTable != lut ) 
    {
    if ( this->LookupTable) 
      {
      this->LookupTable->UnRegister(this);
      }
    this->LookupTable = lut;
    if (lut)
      {
      lut->Register(this);
      }
    this->Modified();
    }
}

vtkScalarsToColors *vtkMapper::GetLookupTable()
{
  if ( this->LookupTable == NULL )
    {
    this->CreateDefaultLookupTable();
    }
  return this->LookupTable;
}

void vtkMapper::CreateDefaultLookupTable()
{
  if ( this->LookupTable) 
    {
    this->LookupTable->UnRegister(this);
    }
  this->LookupTable = vtkLookupTable::New();
  // Consistent Register/UnRegisters.
  this->LookupTable->Register(this);
  this->LookupTable->Delete();
}

// Update the network connected to this mapper.
void vtkMapper::Update()
{
  if ( this->GetInput() )
    {
    this->GetInput()->Update();
    }
}

// Return the method of coloring scalar data.
const char *vtkMapper::GetColorModeAsString(void)
{
  if ( this->ColorMode == VTK_COLOR_MODE_MAP_SCALARS ) 
    {
    return "MapScalars";
    }
  else 
    {
    return "Default";
    }
}

// Return the method for obtaining scalar data.
const char *vtkMapper::GetScalarModeAsString(void)
{
  if ( this->ScalarMode == VTK_SCALAR_MODE_USE_CELL_DATA )
    {
    return "UseCellData";
    }
  else if ( this->ScalarMode == VTK_SCALAR_MODE_USE_POINT_DATA ) 
    {
    return "UsePointData";
    }
  else if ( this->ScalarMode == VTK_SCALAR_MODE_USE_POINT_FIELD_DATA )
    {
    return "UsePointFieldData";
    }
  else if ( this->ScalarMode == VTK_SCALAR_MODE_USE_CELL_FIELD_DATA )
    {
    return "UseCellFieldData";
    }
  else 
    {
    return "Default";
    }
}

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

  if ( this->LookupTable )
    {
    os << indent << "Lookup Table:\n";
    this->LookupTable->PrintSelf(os,indent.GetNextIndent());
    }
  else
    {
    os << indent << "Lookup Table: (none)\n";
    }

  os << indent << "Immediate Mode Rendering: " 
    << (this->ImmediateModeRendering ? "On\n" : "Off\n");
  os << indent << "Global Immediate Mode Rendering: " << 
    (vtkMapperGlobalImmediateModeRendering ? "On\n" : "Off\n");

  os << indent << "Scalar Visibility: " 
    << (this->ScalarVisibility ? "On\n" : "Off\n");

  float *range = this->GetScalarRange();
  os << indent << "Scalar Range: (" << range[0] << ", " << range[1] << ")\n";

  os << indent << "UseLookupTableScalarRange: " 
     << this->UseLookupTableScalarRange << "\n";

  os << indent << "Color Mode: " << this->GetColorModeAsString() << endl;

  os << indent << "Scalar Mode: " << this->GetScalarModeAsString() << endl;

  os << indent << "RenderTime: " << this->RenderTime << endl;

  os << indent << "Resolve Coincident Topology: ";
  if ( vtkMapperGlobalResolveCoincidentTopology == VTK_RESOLVE_OFF )
    {
    os << "Off" << endl;
    }
  else if ( vtkMapperGlobalResolveCoincidentTopology == VTK_RESOLVE_POLYGON_OFFSET )
    {
    os << "Polygon Offset" << endl;
    }
  else
    {
    os << "Shift Z-Buffer" << endl;
    }
}
