dox/Common/vtkMatrix4x4.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkMatrix4x4.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.

=========================================================================*/
#ifndef __vtkMatrix4x4_h
#define __vtkMatrix4x4_h

#include "vtkObject.h"

class VTK_COMMON_EXPORT vtkMatrix4x4 : public vtkObject
{
  // Some of the methods in here have a corresponding static (class)
  // method taking a pointer to 16 doubles that constitutes a user
  // supplied matrix. This allows C++ clients to allocate double arrays
  // on the stack and manipulate them using vtkMatrix4x4 methods. 
  // This is an alternative to allowing vtkMatrix4x4 instances to be
  // created on the stack (which is frowned upon) or doing lots of
  // temporary heap allocation within vtkTransform and vtkActor methods,
  // which is inefficient.

public:
  double Element[4][4];

  static vtkMatrix4x4 *New();

  vtkTypeMacro(vtkMatrix4x4,vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent);
  

  void DeepCopy(vtkMatrix4x4 *source) 
    {vtkMatrix4x4::DeepCopy(*this->Element,source); this->Modified(); }
//BTX
  static void DeepCopy(double Elements[16], vtkMatrix4x4 *source) 
    {vtkMatrix4x4::DeepCopy(Elements,*source->Element); }
  static void DeepCopy(double Elements[16], const double newElements[16]);
//ETX


  void DeepCopy(const double Elements[16]) 
    { this->DeepCopy(*this->Element,Elements); this->Modified(); }


  void Zero() 
    { vtkMatrix4x4::Zero(*this->Element); this->Modified(); }
//BTX
  static void Zero(double Elements[16]);
//ETX  


  void Identity() 
    { vtkMatrix4x4::Identity(*this->Element); this->Modified();}
//BTX
  static void Identity(double Elements[16]);
//ETX  


  static void Invert(vtkMatrix4x4 *in, vtkMatrix4x4 *out) 
    {vtkMatrix4x4::Invert(*in->Element,*out->Element); out->Modified(); }
  void Invert() 
    { vtkMatrix4x4::Invert(this,this); }
//BTX
  static void Invert(const double inElements[16], double outElements[16]);
//ETX



  static void Transpose(vtkMatrix4x4 *in, vtkMatrix4x4 *out) 
    {vtkMatrix4x4::Transpose(*in->Element,*out->Element); out->Modified(); }
  void Transpose() 
    { vtkMatrix4x4::Transpose(this,this); }
//BTX
  static void Transpose(const double inElements[16], double outElements[16]);
//ETX


  void MultiplyPoint(const float in[4], float out[4]) 
    {vtkMatrix4x4::MultiplyPoint(*this->Element,in,out); }
  void MultiplyPoint(const double in[4], double out[4]) 
    {vtkMatrix4x4::MultiplyPoint(*this->Element,in,out); }

//BTX
  static void MultiplyPoint(const double Elements[16], 
                            const float in[4], float out[4]);
  static void MultiplyPoint(const double Elements[16], 
                            const double in[4], double out[4]);
//ETX


  float *MultiplyPoint(const float in[4]) 
    {return this->MultiplyFloatPoint(in); }
  float *MultiplyFloatPoint(const float in[4]) 
    {this->MultiplyPoint(in,this->FloatPoint); return this->FloatPoint; } 
  double *MultiplyDoublePoint(const double in[4]) 
    {this->MultiplyPoint(in,this->DoublePoint); return this->DoublePoint; } 


  static void Multiply4x4(vtkMatrix4x4 *a, vtkMatrix4x4 *b, vtkMatrix4x4 *c) {
    vtkMatrix4x4::Multiply4x4(*a->Element,*b->Element,*c->Element); };
//BTX
  static void Multiply4x4(const double a[16], const double b[16], 
                          double c[16]);
//ETX


  void Adjoint(vtkMatrix4x4 *in, vtkMatrix4x4 *out) 
    {vtkMatrix4x4::Adjoint(*in->Element,*out->Element);}
//BTX
  static void Adjoint(const double inElements[16], double outElements[16]);
//ETX

  double Determinant() {return vtkMatrix4x4::Determinant(*this->Element);}
//BTX
  static double Determinant(const double Elements[16]);
//ETX

  void SetElement(int i, int j, double value);


  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]); }  
  void Adjoint(vtkMatrix4x4 &in,vtkMatrix4x4 &out)
    {this->Adjoint(&in,&out);}
  double Determinant(vtkMatrix4x4 &in) 
    {return this->Determinant(&in);}
  double Determinant(vtkMatrix4x4 *in) 
    {return vtkMatrix4x4::Determinant(*in->Element);}
  void Invert(vtkMatrix4x4 &in,vtkMatrix4x4 &out)
    {this->Invert(&in,&out);}
  void Transpose(vtkMatrix4x4 &in,vtkMatrix4x4 &out)
    {this->Transpose(&in,&out);}
  static void PointMultiply(const double Elements[16], 
                            const float in[4], float out[4]);
  static void PointMultiply(const double Elements[16], 
                            const double in[4], double out[4]);
//ETX

protected:
  vtkMatrix4x4() { vtkMatrix4x4::Identity(*this->Element); };
  ~vtkMatrix4x4() {};
  
  float FloatPoint[4];
  double DoublePoint[4];
private:
  vtkMatrix4x4(const vtkMatrix4x4&);  // Not implemented
  void operator= (const vtkMatrix4x4&);  // Not implemented
};

inline void vtkMatrix4x4::SetElement(int i, int j, double value)
{
  if (this->Element[i][j] != value)
    {
    this->Element[i][j] = value;
    this->Modified();
    }
}

#endif

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