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/*=========================================================================
Program: Visualization Toolkit
Module: vtkIdentityTransform.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 "vtkIdentityTransform.h"
#include "vtkDataArray.h"
#include "vtkMath.h"
#include "vtkObjectFactory.h"
#include "vtkPoints.h"
vtkStandardNewMacro(vtkIdentityTransform);
//----------------------------------------------------------------------------
vtkIdentityTransform::vtkIdentityTransform()
{
}
//----------------------------------------------------------------------------
vtkIdentityTransform::~vtkIdentityTransform()
{
}
//----------------------------------------------------------------------------
void vtkIdentityTransform::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
//------------------------------------------------------------------------
void vtkIdentityTransform::InternalDeepCopy(vtkAbstractTransform *)
{
// nothin' to do
}
//----------------------------------------------------------------------------
vtkAbstractTransform *vtkIdentityTransform::MakeTransform()
{
return vtkIdentityTransform::New();
}
//------------------------------------------------------------------------
template<class T2, class T3>
void vtkIdentityTransformPoint(T2 in[3], T3 out[3])
{
out[0] = in[0];
out[1] = in[1];
out[2] = in[2];
}
//------------------------------------------------------------------------
template<class T2, class T3, class T4>
void vtkIdentityTransformDerivative(T2 in[3], T3 out[3],
T4 derivative[3][3])
{
out[0] = in[0];
out[1] = in[1];
out[2] = in[2];
vtkMath::Identity3x3(derivative);
}
//------------------------------------------------------------------------
void vtkIdentityTransform::InternalTransformPoint(const float in[3],
float out[3])
{
vtkIdentityTransformPoint(in,out);
}
//------------------------------------------------------------------------
void vtkIdentityTransform::InternalTransformPoint(const double in[3],
double out[3])
{
vtkIdentityTransformPoint(in,out);
}
//------------------------------------------------------------------------
void vtkIdentityTransform::InternalTransformNormal(const float in[3],
float out[3])
{
vtkIdentityTransformPoint(in,out);
vtkMath::Normalize(out);
}
//------------------------------------------------------------------------
void vtkIdentityTransform::InternalTransformNormal(const double in[3],
double out[3])
{
vtkIdentityTransformPoint(in,out);
vtkMath::Normalize(out);
}
//------------------------------------------------------------------------
void vtkIdentityTransform::InternalTransformVector(const float in[3],
float out[3])
{
vtkIdentityTransformPoint(in,out);
}
//------------------------------------------------------------------------
void vtkIdentityTransform::InternalTransformVector(const double in[3],
double out[3])
{
vtkIdentityTransformPoint(in,out);
}
//----------------------------------------------------------------------------
void vtkIdentityTransform::InternalTransformDerivative(const float in[3],
float out[3],
float derivative[3][3])
{
vtkIdentityTransformDerivative(in,out,derivative);
}
//----------------------------------------------------------------------------
void vtkIdentityTransform::InternalTransformDerivative(const double in[3],
double out[3],
double derivative[3][3])
{
vtkIdentityTransformDerivative(in,out,derivative);
}
//----------------------------------------------------------------------------
// Transform the normals and vectors using the derivative of the
// transformation. Either inNms or inVrs can be set to NULL.
// Normals are multiplied by the inverse transpose of the transform
// derivative, while vectors are simply multiplied by the derivative.
// Note that the derivative of the inverse transform is simply the
// inverse of the derivative of the forward transform.
void vtkIdentityTransform::TransformPointsNormalsVectors(vtkPoints *inPts,
vtkPoints *outPts,
vtkDataArray *inNms,
vtkDataArray *outNms,
vtkDataArray *inVrs,
vtkDataArray *outVrs)
{
this->TransformPoints(inPts,outPts);
if (inNms)
{
this->TransformNormals(inNms,outNms);
}
if (inVrs)
{
this->TransformVectors(inVrs,outVrs);
}
}
//----------------------------------------------------------------------------
void vtkIdentityTransform::TransformPoints(vtkPoints *inPts,
vtkPoints *outPts)
{
int n = inPts->GetNumberOfPoints();
double point[3];
for (int i = 0; i < n; i++)
{
inPts->GetPoint(i,point);
outPts->InsertNextPoint(point);
}
}
//----------------------------------------------------------------------------
void vtkIdentityTransform::TransformNormals(vtkDataArray *inNms,
vtkDataArray *outNms)
{
int n = inNms->GetNumberOfTuples();
double normal[3];
for (int i = 0; i < n; i++)
{
inNms->GetTuple(i,normal);
outNms->InsertNextTuple(normal);
}
}
//----------------------------------------------------------------------------
void vtkIdentityTransform::TransformVectors(vtkDataArray *inNms,
vtkDataArray *outNms)
{
int n = inNms->GetNumberOfTuples();
double vect[3];
for (int i = 0; i < n; i++)
{
inNms->GetTuple(i,vect);
outNms->InsertNextTuple(vect);
}
}
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