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/*=========================================================================
Program: Visualization Toolkit
Module: vtkLineSource.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 "vtkLineSource.h"
#include "vtkCellArray.h"
#include "vtkFloatArray.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkStreamingDemandDrivenPipeline.h"
#include "vtkPointData.h"
#include "vtkPoints.h"
#include "vtkPolyData.h"
#include <math.h>
vtkStandardNewMacro(vtkLineSource);
vtkLineSource::vtkLineSource(int res)
{
this->Point1[0] = -0.5;
this->Point1[1] = 0.0;
this->Point1[2] = 0.0;
this->Point2[0] = 0.5;
this->Point2[1] = 0.0;
this->Point2[2] = 0.0;
this->Resolution = (res < 1 ? 1 : res);
this->SetNumberOfInputPorts(0);
}
int vtkLineSource::RequestInformation(
vtkInformation *vtkNotUsed(request),
vtkInformationVector **vtkNotUsed(inputVector),
vtkInformationVector *outputVector)
{
// get the info object
vtkInformation *outInfo = outputVector->GetInformationObject(0);
outInfo->Set(vtkStreamingDemandDrivenPipeline::MAXIMUM_NUMBER_OF_PIECES(),
-1);
return 1;
}
int vtkLineSource::RequestData(
vtkInformation *vtkNotUsed(request),
vtkInformationVector **vtkNotUsed(inputVector),
vtkInformationVector *outputVector)
{
// get the info object
vtkInformation *outInfo = outputVector->GetInformationObject(0);
// get the ouptut
vtkPolyData *output = vtkPolyData::SafeDownCast(
outInfo->Get(vtkDataObject::DATA_OBJECT()));
int numLines=this->Resolution;
int numPts=this->Resolution+1;
double x[3], tc[3], v[3];
int i, j;
vtkPoints *newPoints;
vtkFloatArray *newTCoords;
vtkCellArray *newLines;
if (outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_PIECE_NUMBER()) > 0)
{
return 1;
}
newPoints = vtkPoints::New();
newPoints->Allocate(numPts);
newTCoords = vtkFloatArray::New();
newTCoords->SetNumberOfComponents(2);
newTCoords->Allocate(2*numPts);
newTCoords->SetName("Texture Coordinates");
newLines = vtkCellArray::New();
newLines->Allocate(newLines->EstimateSize(numLines,2));
//
// Generate points and texture coordinates
//
for (i=0; i<3; i++)
{
v[i] = this->Point2[i] - this->Point1[i];
}
tc[1] = 0.0;
tc[2] = 0.0;
for (i=0; i<numPts; i++)
{
tc[0] = ((double)i/this->Resolution);
for (j=0; j<3; j++)
{
x[j] = this->Point1[j] + tc[0]*v[j];
}
newPoints->InsertPoint(i,x);
newTCoords->InsertTuple(i,tc);
}
//
// Generate lines
//
newLines->InsertNextCell(numPts);
for (i=0; i < numPts; i++)
{
newLines->InsertCellPoint (i);
}
//
// Update ourselves and release memory
//
output->SetPoints(newPoints);
newPoints->Delete();
output->GetPointData()->SetTCoords(newTCoords);
newTCoords->Delete();
output->SetLines(newLines);
newLines->Delete();
return 1;
}
void vtkLineSource::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
os << indent << "Resolution: " << this->Resolution << "\n";
os << indent << "Point 1: (" << this->Point1[0] << ", "
<< this->Point1[1] << ", "
<< this->Point1[2] << ")\n";
os << indent << "Point 2: (" << this->Point2[0] << ", "
<< this->Point2[1] << ", "
<< this->Point2[2] << ")\n";
}
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