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vtkPointLoad.h
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vtkPointLoad.h
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkPointLoad.h
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.
=========================================================================*/
// .NAME vtkPointLoad - compute stress tensors given point load on semi-infinite domain
// .SECTION Description
// vtkPointLoad is a source object that computes stress tensors on a volume.
// The tensors are computed from the application of a point load on a
// semi-infinite domain. (The analytical results are adapted from Saada - see
// text.) It also is possible to compute effective stress scalars if desired.
// This object serves as a specialized data generator for some of the examples
// in the text.
// .SECTION See Also
// vtkTensorGlyph, vtkHyperStreamline
#ifndef __vtkPointLoad_h
#define __vtkPointLoad_h
#include "vtkImageAlgorithm.h"
class VTK_IMAGING_EXPORT vtkPointLoad : public vtkImageAlgorithm
{
public:
vtkTypeMacro(vtkPointLoad,vtkImageAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Construct with ModelBounds=(-1,1,-1,1,-1,1), SampleDimensions=(50,50,50),
// and LoadValue = 1.
static vtkPointLoad *New();
// Description:
// Set/Get value of applied load.
vtkSetMacro(LoadValue,double);
vtkGetMacro(LoadValue,double);
// Description:
// Specify the dimensions of the volume. A stress tensor will be computed for
// each point in the volume.
void SetSampleDimensions(int i, int j, int k);
// Description:
// Specify the dimensions of the volume. A stress tensor will be computed for
// each point in the volume.
void SetSampleDimensions(int dim[3]);
vtkGetVectorMacro(SampleDimensions,int,3);
// Description:
// Specify the region in space over which the tensors are computed. The point
// load is assumed to be applied at top center of the volume.
vtkSetVector6Macro(ModelBounds,double);
vtkGetVectorMacro(ModelBounds,double,6);
// Description:
// Set/Get Poisson's ratio.
vtkSetMacro(PoissonsRatio,double);
vtkGetMacro(PoissonsRatio,double);
// Description:
// Turn on/off computation of effective stress scalar. These methods do
// nothing. The effective stress is always computed.
void SetComputeEffectiveStress(int) {};
int GetComputeEffectiveStress() {return 1;};
void ComputeEffectiveStressOn() {};
void ComputeEffectiveStressOff() {};
protected:
vtkPointLoad();
~vtkPointLoad() {};
virtual int RequestInformation (vtkInformation *,
vtkInformationVector **,
vtkInformationVector *);
virtual void ExecuteData(vtkDataObject *);
double LoadValue;
double PoissonsRatio;
int SampleDimensions[3];
double ModelBounds[6];
private:
vtkPointLoad(const vtkPointLoad&); // Not implemented.
void operator=(const vtkPointLoad&); // Not implemented.
};
#endif