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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
/**
* @class vtkIdentityTransform
* @brief a transform that doesn't do anything
*
* vtkIdentityTransform is a transformation which will simply pass coordinate
* data unchanged. All other transform types can also do this, however,
* the vtkIdentityTransform does so with much greater efficiency.
* @sa
* vtkLinearTransform
*/
#ifndef vtkIdentityTransform_h
#define vtkIdentityTransform_h
#include "vtkCommonTransformsModule.h" // For export macro
#include "vtkLinearTransform.h"
VTK_ABI_NAMESPACE_BEGIN
class VTKCOMMONTRANSFORMS_EXPORT vtkIdentityTransform : public vtkLinearTransform
{
public:
static vtkIdentityTransform* New();
vtkTypeMacro(vtkIdentityTransform, vtkLinearTransform);
void PrintSelf(ostream& os, vtkIndent indent) override;
/**
* Apply the transformation to a series of points, and append the
* results to outPts.
*/
void TransformPoints(vtkPoints* inPts, vtkPoints* outPts) override;
/**
* Apply the transformation to a series of normals, and append the
* results to outNms.
*/
void TransformNormals(vtkDataArray* inNms, vtkDataArray* outNms) override;
/**
* Apply the transformation to a series of vectors, and append the
* results to outVrs.
*/
void TransformVectors(vtkDataArray* inVrs, vtkDataArray* outVrs) override;
/**
* Apply the transformation to a combination of points, normals
* and vectors.
*/
void TransformPointsNormalsVectors(vtkPoints* inPts, vtkPoints* outPts, vtkDataArray* inNms,
vtkDataArray* outNms, vtkDataArray* inVrs, vtkDataArray* outVrs, int nOptionalVectors = 0,
vtkDataArray** inVrsArr = nullptr, vtkDataArray** outVrsArr = nullptr) override;
// Invert the transformation. This doesn't do anything to the
// identity transformation.
void Inverse() override {}
///@{
/**
* This will calculate the transformation without calling Update.
* Meant for use only within other VTK classes.
*/
void InternalTransformPoint(const float in[3], float out[3]) override;
void InternalTransformPoint(const double in[3], double out[3]) override;
///@}
///@{
/**
* This will calculate the transformation without calling Update.
* Meant for use only within other VTK classes.
*/
void InternalTransformNormal(const float in[3], float out[3]) override;
void InternalTransformNormal(const double in[3], double out[3]) override;
///@}
///@{
/**
* This will calculate the transformation without calling Update.
* Meant for use only within other VTK classes.
*/
void InternalTransformVector(const float in[3], float out[3]) override;
void InternalTransformVector(const double in[3], double out[3]) override;
///@}
///@{
/**
* This will calculate the transformation as well as its derivative
* without calling Update. Meant for use only within other VTK
* classes.
*/
void InternalTransformDerivative(
const float in[3], float out[3], float derivative[3][3]) override;
void InternalTransformDerivative(
const double in[3], double out[3], double derivative[3][3]) override;
///@}
/**
* Make a transform of the same type. This will actually
* return the same transform.
*/
vtkAbstractTransform* MakeTransform() override;
protected:
vtkIdentityTransform();
~vtkIdentityTransform() override;
void InternalDeepCopy(vtkAbstractTransform* t) override;
private:
vtkIdentityTransform(const vtkIdentityTransform&) = delete;
void operator=(const vtkIdentityTransform&) = delete;
};
VTK_ABI_NAMESPACE_END
#endif
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