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147 lines
3.8 KiB
147 lines
3.8 KiB
/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkLineSource.cxx,v $
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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#include "vtkLineSource.h"
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#include "vtkCellArray.h"
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#include "vtkFloatArray.h"
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#include "vtkInformation.h"
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#include "vtkInformationVector.h"
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#include "vtkObjectFactory.h"
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#include "vtkStreamingDemandDrivenPipeline.h"
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#include "vtkPointData.h"
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#include "vtkPoints.h"
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#include "vtkPolyData.h"
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#include <math.h>
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vtkCxxRevisionMacro(vtkLineSource, "$Revision: 1.47 $");
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vtkStandardNewMacro(vtkLineSource);
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vtkLineSource::vtkLineSource(int res)
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{
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this->Point1[0] = -0.5;
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this->Point1[1] = 0.0;
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this->Point1[2] = 0.0;
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this->Point2[0] = 0.5;
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this->Point2[1] = 0.0;
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this->Point2[2] = 0.0;
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this->Resolution = (res < 1 ? 1 : res);
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this->SetNumberOfInputPorts(0);
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}
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int vtkLineSource::RequestInformation(
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vtkInformation *vtkNotUsed(request),
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vtkInformationVector **vtkNotUsed(inputVector),
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vtkInformationVector *outputVector)
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{
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// get the info object
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vtkInformation *outInfo = outputVector->GetInformationObject(0);
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outInfo->Set(vtkStreamingDemandDrivenPipeline::MAXIMUM_NUMBER_OF_PIECES(),
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-1);
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return 1;
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}
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int vtkLineSource::RequestData(
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vtkInformation *vtkNotUsed(request),
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vtkInformationVector **vtkNotUsed(inputVector),
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vtkInformationVector *outputVector)
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{
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// get the info object
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vtkInformation *outInfo = outputVector->GetInformationObject(0);
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// get the ouptut
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vtkPolyData *output = vtkPolyData::SafeDownCast(
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outInfo->Get(vtkDataObject::DATA_OBJECT()));
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int numLines=this->Resolution;
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int numPts=this->Resolution+1;
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double x[3], tc[3], v[3];
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int i, j;
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vtkPoints *newPoints;
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vtkFloatArray *newTCoords;
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vtkCellArray *newLines;
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if (outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_PIECE_NUMBER()) > 0)
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{
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return 1;
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}
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newPoints = vtkPoints::New();
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newPoints->Allocate(numPts);
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newTCoords = vtkFloatArray::New();
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newTCoords->SetNumberOfComponents(2);
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newTCoords->Allocate(2*numPts);
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newLines = vtkCellArray::New();
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newLines->Allocate(newLines->EstimateSize(numLines,2));
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//
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// Generate points and texture coordinates
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//
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for (i=0; i<3; i++)
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{
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v[i] = this->Point2[i] - this->Point1[i];
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}
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tc[1] = 0.0;
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tc[2] = 0.0;
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for (i=0; i<numPts; i++)
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{
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tc[0] = ((double)i/this->Resolution);
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for (j=0; j<3; j++)
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{
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x[j] = this->Point1[j] + tc[0]*v[j];
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}
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newPoints->InsertPoint(i,x);
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newTCoords->InsertTuple(i,tc);
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}
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//
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// Generate lines
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//
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newLines->InsertNextCell(numPts);
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for (i=0; i < numPts; i++)
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{
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newLines->InsertCellPoint (i);
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}
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//
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// Update ourselves and release memory
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//
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output->SetPoints(newPoints);
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newPoints->Delete();
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output->GetPointData()->SetTCoords(newTCoords);
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newTCoords->Delete();
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output->SetLines(newLines);
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newLines->Delete();
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return 1;
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}
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void vtkLineSource::PrintSelf(ostream& os, vtkIndent indent)
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{
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this->Superclass::PrintSelf(os,indent);
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os << indent << "Resolution: " << this->Resolution << "\n";
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os << indent << "Point 1: (" << this->Point1[0] << ", "
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<< this->Point1[1] << ", "
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<< this->Point1[2] << ")\n";
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os << indent << "Point 2: (" << this->Point2[0] << ", "
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<< this->Point2[1] << ", "
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<< this->Point2[2] << ")\n";
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}
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