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

  Program:   Visualization Toolkit
  Module:    vtkTransform2D.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 vtkTransform2D_h
#define vtkTransform2D_h

#include "vtkCommonTransformsModule.h" // For export macro
#include "vtkObject.h"

#include "vtkMatrix3x3.h" // Needed for inline methods

class vtkPoints2D;

class VTKCOMMONTRANSFORMS_EXPORT vtkTransform2D : public vtkObject
{
 public:
  static vtkTransform2D *New();
  vtkTypeMacro(vtkTransform2D,vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent);

  void Identity();

  void Inverse();


  void Translate(double x, double y);
  void Translate(const double x[2]) { this->Translate(x[0], x[1]); }
  void Translate(const float x[2]) { this->Translate(x[0], x[1]); }

  void Rotate(double angle);


  void Scale(double x, double y);
  void Scale(const double s[2]) { this->Scale(s[0], s[1]); }
  void Scale(const float s[2]) { this->Scale(s[0], s[1]); }


  void SetMatrix(vtkMatrix3x3 *matrix) {
    this->SetMatrix(matrix->GetData()); }
  void SetMatrix(const double elements[9]);


  vtkGetObjectMacro(Matrix, vtkMatrix3x3);
  void GetMatrix(vtkMatrix3x3 *matrix);


  void GetPosition(double pos[2]);
  void GetPosition(float pos[2]) {
    double temp[2];
    this->GetPosition(temp);
    pos[0] = static_cast<float>(temp[0]);
    pos[1] = static_cast<float>(temp[1]); }


  void GetScale(double pos[2]);
  void GetScale(float pos[2]) {
    double temp[2];
    this->GetScale(temp);
    pos[0] = static_cast<float>(temp[0]);
    pos[1] = static_cast<float>(temp[1]); }

  void GetInverse(vtkMatrix3x3 *inverse);

  void GetTranspose(vtkMatrix3x3 *transpose);

  unsigned long GetMTime();

  void TransformPoints(const float *inPts, float *outPts, int n);

  void TransformPoints(const double *inPts, double *outPts, int n);

  void TransformPoints(vtkPoints2D *inPts, vtkPoints2D *outPts);

  void InverseTransformPoints(const float *inPts, float *outPts, int n);

  void InverseTransformPoints(const double *inPts, double *outPts, int n);

  void InverseTransformPoints(vtkPoints2D *inPts, vtkPoints2D *outPts);


  void MultiplyPoint(const float in[3], float out[3]) {
    this->GetMatrix()->MultiplyPoint(in,out);};
  void MultiplyPoint(const double in[3], double out[3]) {
    this->GetMatrix()->MultiplyPoint(in,out);};

protected:
  vtkTransform2D ();
  ~vtkTransform2D ();

  void InternalDeepCopy(vtkTransform2D *t);

  vtkMatrix3x3 *Matrix;
  vtkMatrix3x3 *InverseMatrix;

private:
  vtkTransform2D (const vtkTransform2D&);  // Not implemented
  void operator=(const vtkTransform2D&);  // Not implemented
};

#endif