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/*=========================================================================
Program: Visualization Toolkit
Module: vtkTreeMapToPolyData.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.
=========================================================================*/
/*-------------------------------------------------------------------------
Copyright 2008 Sandia Corporation.
Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
the U.S. Government retains certain rights in this software.
-------------------------------------------------------------------------*/
#include "vtkTreeMapToPolyData.h"
#include "vtkCellArray.h"
#include "vtkCellData.h"
#include "vtkFloatArray.h"
#include "vtkMath.h"
#include "vtkIdTypeArray.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkTree.h"
vtkStandardNewMacro(vtkTreeMapToPolyData);
vtkTreeMapToPolyData::vtkTreeMapToPolyData()
{
this->SetRectanglesArrayName("area");
this->SetLevelArrayName("level");
this->LevelDeltaZ = 0.001;
this->AddNormals = true;
}
vtkTreeMapToPolyData::~vtkTreeMapToPolyData()
{
}
int vtkTreeMapToPolyData::FillInputPortInformation(int vtkNotUsed(port), vtkInformation* info)
{
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkTree");
return 1;
}
int vtkTreeMapToPolyData::RequestData(
vtkInformation *vtkNotUsed(request),
vtkInformationVector **inputVector,
vtkInformationVector *outputVector)
{
// get the info objects
vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
vtkInformation *outInfo = outputVector->GetInformationObject(0);
// get the input and output
vtkTree *inputTree = vtkTree::SafeDownCast(
inInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkPolyData *outputPoly = vtkPolyData::SafeDownCast(
outInfo->Get(vtkDataObject::DATA_OBJECT()));
// For each input vertex create 4 points and 1 cell (quad)
vtkPoints* outputPoints = vtkPoints::New();
outputPoints->SetNumberOfPoints(inputTree->GetNumberOfVertices()*4);
vtkCellArray* outputCells = vtkCellArray::New();
// Create an array for the point normals
vtkFloatArray* normals = vtkFloatArray::New();
normals->SetNumberOfComponents(3);
normals->SetNumberOfTuples(inputTree->GetNumberOfVertices()*4);
normals->SetName("normals");
vtkDataArray* coordArray = this->GetInputArrayToProcess(0, inputTree);
if (!coordArray)
{
vtkErrorMacro("Area array not found.");
return 0;
}
vtkDataArray* levelArray = this->GetInputArrayToProcess(1, inputTree);
// Now set the point coordinates, normals, and insert the cell
for (int i = 0; i < inputTree->GetNumberOfVertices(); i++)
{
// Grab coords from the input
double coords[4];
coordArray->GetTuple(i,coords);
double z = 0;
if (levelArray)
{
z = this->LevelDeltaZ * levelArray->GetTuple1(i);
}
else
{
z = this->LevelDeltaZ * inputTree->GetLevel(i);
}
int index = i*4;
outputPoints->SetPoint(index, coords[0], coords[2], z);
outputPoints->SetPoint(index+1, coords[1], coords[2], z);
outputPoints->SetPoint(index+2, coords[1], coords[3], z);
outputPoints->SetPoint(index+3, coords[0], coords[3], z);
// Create an asymetric gradient on the cells
// this gradient helps differentiate same colored
// cells from their neighbors. The asymetric
// nature of the gradient is required.
normals->SetComponent(index, 0, 0);
normals->SetComponent(index, 1, .707);
normals->SetComponent(index, 2, .707);
normals->SetComponent(index+1, 0, 0);
normals->SetComponent(index+1, 1, .866);
normals->SetComponent(index+1, 2, .5);
normals->SetComponent(index+2, 0, 0);
normals->SetComponent(index+2, 1, .707);
normals->SetComponent(index+2, 2, .707);
normals->SetComponent(index+3, 0, 0);
normals->SetComponent(index+3, 1, 0);
normals->SetComponent(index+3, 2, 1);
// Create the cell that uses these points
vtkIdType cellConn[] = {index, index+1, index+2, index+3};
outputCells->InsertNextCell(4, cellConn);
}
// Pass the input point data to the output cell data :)
outputPoly->GetCellData()->PassData(inputTree->GetVertexData());
// Set the output points and cells
outputPoly->SetPoints(outputPoints);
outputPoly->SetPolys(outputCells);
if( this->AddNormals )
{
// Set the point normals
outputPoly->GetPointData()->AddArray(normals);
outputPoly->GetPointData()->SetActiveNormals("normals");
}
// Clean up.
normals->Delete();
outputPoints->Delete();
outputCells->Delete();
return 1;
}
void vtkTreeMapToPolyData::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
os << indent << "LevelDeltaZ: " << this->LevelDeltaZ << endl;
os << indent << "AddNormals: " << this->AddNormals << endl;
}
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