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128 lines
3.6 KiB
128 lines
3.6 KiB
/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkDiskSource.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 "vtkDiskSource.h"
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#include "vtkCellArray.h"
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#include "vtkMath.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 "vtkPoints.h"
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#include "vtkPolyData.h"
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vtkCxxRevisionMacro(vtkDiskSource, "$Revision: 1.34 $");
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vtkStandardNewMacro(vtkDiskSource);
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vtkDiskSource::vtkDiskSource()
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{
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this->InnerRadius = 0.25;
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this->OuterRadius = 0.5;
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this->RadialResolution = 1;
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this->CircumferentialResolution = 6;
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this->SetNumberOfInputPorts(0);
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}
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int vtkDiskSource::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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vtkIdType numPolys, numPts;
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double x[3];
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int i, j;
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vtkIdType pts[4];
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double theta, deltaRadius;
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double cosTheta, sinTheta;
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vtkPoints *newPoints;
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vtkCellArray *newPolys;
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// Set things up; allocate memory
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//
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numPts = (this->RadialResolution + 1) *
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(this->CircumferentialResolution + 1);
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numPolys = this->RadialResolution * this->CircumferentialResolution;
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newPoints = vtkPoints::New();
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newPoints->Allocate(numPts);
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newPolys = vtkCellArray::New();
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newPolys->Allocate(newPolys->EstimateSize(numPolys,4));
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// Create disk
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//
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theta = 2.0 * vtkMath::Pi() / ((double)this->CircumferentialResolution);
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deltaRadius = (this->OuterRadius - this->InnerRadius) /
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((double)this->RadialResolution);
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for (i=0; i < this->CircumferentialResolution; i++)
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{
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cosTheta = cos((double)i*theta);
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sinTheta = sin((double)i*theta);
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for (j=0; j <= this->RadialResolution; j++)
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{
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x[0] = (this->InnerRadius + j*deltaRadius) * cosTheta;
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x[1] = (this->InnerRadius + j*deltaRadius) * sinTheta;
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x[2] = 0.0;
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newPoints->InsertNextPoint(x);
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}
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}
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// Create connectivity
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//
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for (i=0; i < this->CircumferentialResolution; i++)
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{
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for (j=0; j < this->RadialResolution; j++)
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{
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pts[0] = i*(this->RadialResolution+1) + j;
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pts[1] = pts[0] + 1;
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if ( i < (this->CircumferentialResolution-1) )
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{
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pts[2] = pts[1] + this->RadialResolution + 1;
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}
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else
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{
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pts[2] = j + 1;
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}
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pts[3] = pts[2] - 1;
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newPolys->InsertNextCell(4,pts);
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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->SetPolys(newPolys);
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newPolys->Delete();
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return 1;
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}
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void vtkDiskSource::PrintSelf(ostream& os, vtkIndent indent)
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{
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this->Superclass::PrintSelf(os,indent);
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os << indent << "InnerRadius: " << this->InnerRadius << "\n";
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os << indent << "OuterRadius: " << this->OuterRadius << "\n";
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os << indent << "RadialResolution: " << this->RadialResolution << "\n";
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os << indent << "CircumferentialResolution: " << this->CircumferentialResolution << "\n";
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}
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