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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkIdentityTransform.h"
#include "vtkDataArray.h"
#include "vtkMath.h"
#include "vtkObjectFactory.h"
#include "vtkPoints.h"
#include "vtkSMPTools.h"
VTK_ABI_NAMESPACE_BEGIN
vtkStandardNewMacro(vtkIdentityTransform);
//------------------------------------------------------------------------------
vtkIdentityTransform::vtkIdentityTransform() = default;
//------------------------------------------------------------------------------
vtkIdentityTransform::~vtkIdentityTransform() = default;
//------------------------------------------------------------------------------
void vtkIdentityTransform::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
//------------------------------------------------------------------------------
void vtkIdentityTransform::InternalDeepCopy(vtkAbstractTransform*)
{
// nothing 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 nullptr.
// 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,
int nOptionalVectors, vtkDataArray** inVrsArr, vtkDataArray** outVrsArr)
{
this->TransformPoints(inPts, outPts);
if (inNms)
{
this->TransformNormals(inNms, outNms);
}
if (inVrs)
{
this->TransformVectors(inVrs, outVrs);
}
if (inVrsArr)
{
for (int iArr = 0; iArr < nOptionalVectors; iArr++)
{
this->TransformVectors(inVrsArr[iArr], outVrsArr[iArr]);
}
}
}
//------------------------------------------------------------------------------
void vtkIdentityTransform::TransformPoints(vtkPoints* inPts, vtkPoints* outPts)
{
vtkIdType n = inPts->GetNumberOfPoints();
vtkIdType m = outPts->GetNumberOfPoints();
outPts->SetNumberOfPoints(m + n);
vtkSMPTools::For(0, n, vtkSMPTools::THRESHOLD,
[&](vtkIdType ptId, vtkIdType endPtId)
{
double point[3];
for (; ptId < endPtId; ++ptId)
{
inPts->GetPoint(ptId, point);
outPts->SetPoint(m + ptId, point);
}
});
}
//------------------------------------------------------------------------------
void vtkIdentityTransform::TransformNormals(vtkDataArray* inNms, vtkDataArray* outNms)
{
vtkIdType n = inNms->GetNumberOfTuples();
vtkIdType m = outNms->GetNumberOfTuples();
outNms->SetNumberOfTuples(m + n);
vtkSMPTools::For(0, n, vtkSMPTools::THRESHOLD,
[&](vtkIdType ptId, vtkIdType endPtId)
{
double normal[3];
for (; ptId < endPtId; ++ptId)
{
inNms->GetTuple(ptId, normal);
outNms->SetTuple(m + ptId, normal);
}
});
}
//------------------------------------------------------------------------------
void vtkIdentityTransform::TransformVectors(vtkDataArray* inVrs, vtkDataArray* outVrs)
{
vtkIdType n = inVrs->GetNumberOfTuples();
vtkIdType m = outVrs->GetNumberOfTuples();
outVrs->SetNumberOfTuples(m + n);
vtkSMPTools::For(0, n, vtkSMPTools::THRESHOLD,
[&](vtkIdType ptId, vtkIdType endPtId)
{
double vect[3];
for (; ptId < endPtId; ++ptId)
{
inVrs->GetTuple(ptId, vect);
outVrs->SetTuple(m + ptId, vect);
}
});
}
VTK_ABI_NAMESPACE_END
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