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/*=========================================================================
Program: Visualization Toolkit
Module: vtkHomogeneousTransform.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 vtkHomogeneousTransform - superclass for homogeneous transformations
// .SECTION Description
// vtkHomogeneousTransform provides a generic interface for homogeneous
// transformations, i.e. transformations which can be represented by
// multiplying a 4x4 matrix with a homogeneous coordinate.
// .SECTION see also
// vtkPerspectiveTransform vtkLinearTransform vtkIdentityTransform
#ifndef __vtkHomogeneousTransform_h
#define __vtkHomogeneousTransform_h
#include "vtkAbstractTransform.h"
class vtkMatrix4x4;
class VTK_COMMON_EXPORT vtkHomogeneousTransform : public vtkAbstractTransform
{
public:
vtkTypeMacro(vtkHomogeneousTransform,vtkAbstractTransform);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Apply the transformation to a series of points, and append the
// results to outPts.
void TransformPoints(vtkPoints *inPts, vtkPoints *outPts);
// Description:
// Apply the transformation to a combination of points, normals
// and vectors.
virtual void TransformPointsNormalsVectors(vtkPoints *inPts,
vtkPoints *outPts,
vtkDataArray *inNms,
vtkDataArray *outNms,
vtkDataArray *inVrs,
vtkDataArray *outVrs);
// Description:
// Get a copy of the internal transformation matrix. The
// transform is Updated first, to guarantee that the matrix
// is valid.
void GetMatrix(vtkMatrix4x4 *m);
// Description:
// Get a pointer to an internal vtkMatrix4x4 that represents
// the transformation. An Update() is called on the transform
// to ensure that the matrix is up-to-date when you get it.
// You should not store the matrix pointer anywhere because it
// might become stale.
vtkMatrix4x4 *GetMatrix() { this->Update(); return this->Matrix; };
// Description:
// Just like GetInverse(), but includes typecast to vtkHomogeneousTransform.
vtkHomogeneousTransform *GetHomogeneousInverse()
{
return static_cast<vtkHomogeneousTransform *>(this->GetInverse());
}
// Description:
// 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]);
void InternalTransformPoint(const double in[3], double out[3]);
// Description:
// 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]);
void InternalTransformDerivative(const double in[3], double out[3],
double derivative[3][3]);
protected:
vtkHomogeneousTransform();
~vtkHomogeneousTransform();
void InternalDeepCopy(vtkAbstractTransform *transform);
vtkMatrix4x4 *Matrix;
private:
vtkHomogeneousTransform(const vtkHomogeneousTransform&); // Not implemented.
void operator=(const vtkHomogeneousTransform&); // Not implemented.
};
#endif
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