/usr/include/vtk-5.8/vtkMatrix3x3.h is in libvtk5-dev 5.8.0-5.
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Program: Visualization Toolkit
Module: vtkMatrix3x3.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 vtkMatrix3x3 - represent and manipulate 3x3 transformation matrices
// .SECTION Description
// vtkMatrix3x3 is a class to represent and manipulate 3x3 matrices.
// Specifically, it is designed to work on 3x3 transformation matrices
// found in 2D rendering using homogeneous coordinates [x y w].
// .SECTION See Also
// vtkTransform2D
#ifndef __vtkMatrix3x3_h
#define __vtkMatrix3x3_h
#include "vtkObject.h"
class VTK_COMMON_EXPORT vtkMatrix3x3 : public vtkObject
{
// Some of the methods in here have a corresponding static (class)
// method taking a pointer to 9 doubles that constitutes a user
// supplied matrix. This allows C++ clients to allocate double arrays
// on the stack and manipulate them using vtkMatrix3x3 methods.
// This is an alternative to allowing vtkMatrix3x3 instances to be
// created on the stack (which is frowned upon) or doing lots of
// temporary heap allocation within vtkTransform2D methods,
// which is inefficient.
public:
// Description:
// Construct a 3x3 identity matrix.
static vtkMatrix3x3 *New();
vtkTypeMacro(vtkMatrix3x3,vtkObject);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Set the elements of the matrix to the same values as the elements
// of the source Matrix.
void DeepCopy(vtkMatrix3x3 *source)
{vtkMatrix3x3::DeepCopy(*this->Element,source); this->Modified(); }
//BTX
static void DeepCopy(double Elements[9], vtkMatrix3x3 *source)
{vtkMatrix3x3::DeepCopy(Elements,*source->Element); }
static void DeepCopy(double Elements[9], const double newElements[9]);
//ETX
// Description:
// Non-static member function. Assigns *from* elements array
void DeepCopy(const double Elements[9])
{ this->DeepCopy(*this->Element,Elements); this->Modified(); }
// Description:
// Set all of the elements to zero.
void Zero()
{ vtkMatrix3x3::Zero(*this->Element); this->Modified(); }
//BTX
static void Zero(double Elements[9]);
//ETX
// Description:
// Set equal to Identity matrix
void Identity()
{ vtkMatrix3x3::Identity(*this->Element); this->Modified();}
//BTX
static void Identity(double Elements[9]);
//ETX
// Description:
// Matrix Inversion (adapted from Richard Carling in "Graphics Gems,"
// Academic Press, 1990).
static void Invert(vtkMatrix3x3 *in, vtkMatrix3x3 *out)
{vtkMatrix3x3::Invert(*in->Element,*out->Element); out->Modified(); }
void Invert()
{ vtkMatrix3x3::Invert(this,this); }
//BTX
static void Invert(const double inElements[9], double outElements[9]);
//ETX
// Description:
// Transpose the matrix and put it into out.
static void Transpose(vtkMatrix3x3 *in, vtkMatrix3x3 *out)
{vtkMatrix3x3::Transpose(*in->Element,*out->Element); out->Modified(); }
void Transpose()
{ vtkMatrix3x3::Transpose(this,this); }
//BTX
static void Transpose(const double inElements[9], double outElements[9]);
//ETX
// Description:
// Multiply a homogeneous coordinate by this matrix, i.e. out = A*in.
// The in[3] and out[3] can be the same array.
void MultiplyPoint(const float in[3], float out[3])
{vtkMatrix3x3::MultiplyPoint(*this->Element,in,out); }
void MultiplyPoint(const double in[3], double out[3])
{vtkMatrix3x3::MultiplyPoint(*this->Element,in,out); }
//BTX
static void MultiplyPoint(const double Elements[9],
const float in[3], float out[3]);
static void MultiplyPoint(const double Elements[9],
const double in[3], double out[3]);
//ETX
// Description:
// Multiplies matrices a and b and stores the result in c (c=a*b).
static void Multiply3x3(vtkMatrix3x3 *a, vtkMatrix3x3 *b, vtkMatrix3x3 *c) {
vtkMatrix3x3::Multiply3x3(*a->Element,*b->Element,*c->Element); }
//BTX
static void Multiply3x3(const double a[9], const double b[9],
double c[9]);
//ETX
// Description:
// Compute adjoint of the matrix and put it into out.
void Adjoint(vtkMatrix3x3 *in, vtkMatrix3x3 *out)
{vtkMatrix3x3::Adjoint(*in->Element,*out->Element);}
//BTX
static void Adjoint(const double inElements[9], double outElements[9]);
//ETX
// Description:
// Compute the determinant of the matrix and return it.
double Determinant() {return vtkMatrix3x3::Determinant(*this->Element);}
//BTX
static double Determinant(const double Elements[9]);
//ETX
// Description:
// Sets the element i,j in the matrix.
void SetElement(int i, int j, double value);
// Description:
// Returns the element i,j from the matrix.
double GetElement(int i, int j) const
{return this->Element[i][j];}
//BTX
double *operator[](const unsigned int i)
{return &(this->Element[i][0]);}
const double *operator[](unsigned int i) const
{ return &(this->Element[i][0]); }
bool operator==(const vtkMatrix3x3&);
bool operator!=(const vtkMatrix3x3&);
void Adjoint(vtkMatrix3x3 &in,vtkMatrix3x3 &out)
{this->Adjoint(&in,&out);}
double Determinant(vtkMatrix3x3 &in)
{return this->Determinant(&in);}
double Determinant(vtkMatrix3x3 *in)
{return vtkMatrix3x3::Determinant(*in->Element);}
void Invert(vtkMatrix3x3 &in,vtkMatrix3x3 &out)
{this->Invert(&in,&out);}
void Transpose(vtkMatrix3x3 &in,vtkMatrix3x3 &out)
{this->Transpose(&in,&out);}
static void PointMultiply(const double Elements[9],
const float in[3], float out[3]);
static void PointMultiply(const double Elements[9],
const double in[3], double out[3]);
//ETX
// Descption:
// Returns true if this matrix is equal to the identity matrix.
bool IsIdentity();
// Description:
// Return a pointer to the first element of the matrix (double[9]).
double * GetData() { return *this->Element; }
//BTX
protected:
vtkMatrix3x3();
~vtkMatrix3x3();
double Element[3][3]; // The elements of the 3x3 matrix
private:
vtkMatrix3x3(const vtkMatrix3x3&); // Not implemented
void operator=(const vtkMatrix3x3&); // Not implemented
//ETX
};
inline void vtkMatrix3x3::SetElement(int i, int j, double value)
{
if (this->Element[i][j] != value)
{
this->Element[i][j] = value;
this->Modified();
}
}
inline bool vtkMatrix3x3::IsIdentity()
{
double *M = *this->Element;
if (M[0] == 1.0 && M[4] == 1.0 && M[8] == 1.0 &&
M[1] == 0.0 && M[2] == 0.0 && M[3] == 0.0 && M[5] == 0.0 &&
M[6] == 0.0 && M[7] == 0.0)
{
return true;
}
else
{
return false;
}
}
inline bool vtkMatrix3x3::operator==(const vtkMatrix3x3 &other)
{
for (int i = 0; i < 3; ++i)
{
for (int j = 0; j < 3; ++j)
{
if (Element[i][j] != other.Element[i][j])
{
return false;
}
}
}
return true;
}
inline bool vtkMatrix3x3::operator!=(const vtkMatrix3x3 &other)
{
for (int i = 0; i < 3; ++i)
{
for (int j = 0; j < 3; ++j)
{
if (Element[i][j] != other.Element[i][j])
{
return true;
}
}
}
return false;
}
#endif
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