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vtkArrowSource.cxx
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vtkArrowSource.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkArrowSource.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 "vtkArrowSource.h"
#include "vtkAppendPolyData.h"
#include "vtkConeSource.h"
#include "vtkCylinderSource.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkPolyData.h"
#include "vtkStreamingDemandDrivenPipeline.h"
#include "vtkTransform.h"
#include "vtkTransformFilter.h"
vtkStandardNewMacro(vtkArrowSource);
vtkArrowSource::vtkArrowSource()
{
this->TipResolution = 6;
this->TipRadius = 0.1;
this->TipLength = 0.35;
this->ShaftResolution = 6;
this->ShaftRadius = 0.03;
this->Invert = false;
this->SetNumberOfInputPorts(0);
}
int vtkArrowSource::RequestInformation(
vtkInformation* request, vtkInformationVector** inputVector, vtkInformationVector* outputVector)
{
outputVector->GetInformationObject(0)->Set(CAN_HANDLE_PIECE_REQUEST(), 1);
return Superclass::RequestInformation(request, inputVector, outputVector);
}
int vtkArrowSource::RequestData(vtkInformation* vtkNotUsed(request),
vtkInformationVector** vtkNotUsed(inputVector), vtkInformationVector* outputVector)
{
// get the info object
vtkInformation* outInfo = outputVector->GetInformationObject(0);
// get the output
vtkPolyData* output = vtkPolyData::SafeDownCast(outInfo->Get(vtkDataObject::DATA_OBJECT()));
int piece, numPieces;
vtkCylinderSource* cyl = vtkCylinderSource::New();
vtkTransform* trans0 = vtkTransform::New();
vtkTransformFilter* tf0 = vtkTransformFilter::New();
vtkConeSource* cone = vtkConeSource::New();
vtkTransform* trans1 = vtkTransform::New();
vtkTransform* trans2 = vtkTransform::New();
vtkTransformFilter* tf1 = vtkTransformFilter::New();
vtkTransformFilter* tf2 = vtkTransformFilter::New();
vtkAppendPolyData* append = vtkAppendPolyData::New();
piece = outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_PIECE_NUMBER());
numPieces = outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_NUMBER_OF_PIECES());
outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_NUMBER_OF_GHOST_LEVELS());
cyl->SetResolution(this->ShaftResolution);
cyl->SetRadius(this->ShaftRadius);
cyl->SetHeight(1.0 - this->TipLength);
cyl->SetCenter(0, (1.0 - this->TipLength) * 0.5, 0.0);
cyl->CappingOn();
trans0->RotateZ(-90.0);
tf0->SetTransform(trans0);
tf0->SetInputConnection(cyl->GetOutputPort());
cone->SetResolution(this->TipResolution);
cone->SetHeight(this->TipLength);
cone->SetRadius(this->TipRadius);
trans1->Translate(1.0 - this->TipLength * 0.5, 0.0, 0.0);
tf1->SetTransform(trans1);
tf1->SetInputConnection(cone->GetOutputPort());
append->AddInputConnection(tf0->GetOutputPort());
append->AddInputConnection(tf1->GetOutputPort());
// used only when this->Invert is true.
trans2->Translate(1, 0, 0);
trans2->Scale(-1, 1, 1);
tf2->SetTransform(trans2);
tf2->SetInputConnection(append->GetOutputPort());
if (piece == 0 && numPieces > 0)
{
if (this->Invert)
{
tf2->Update();
output->ShallowCopy(tf2->GetOutput());
}
else
{
append->Update();
output->ShallowCopy(append->GetOutput());
}
}
cone->Delete();
trans0->Delete();
tf0->Delete();
cyl->Delete();
trans1->Delete();
tf1->Delete();
append->Delete();
tf2->Delete();
trans2->Delete();
return 1;
}
void vtkArrowSource::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "TipResolution: " << this->TipResolution << "\n";
os << indent << "TipRadius: " << this->TipRadius << "\n";
os << indent << "TipLength: " << this->TipLength << "\n";
os << indent << "ShaftResolution: " << this->ShaftResolution << "\n";
os << indent << "ShaftRadius: " << this->ShaftRadius << "\n";
os << indent << "Invert: " << this->Invert << "\n";
}