---

Common/vtkTransform.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkTransform.h,v $
  Language:  C++

  Copyright (c) 1993-2002 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 __vtkTransform_h
#define __vtkTransform_h

#include "vtkLinearTransform.h"

#include "vtkMatrix4x4.h" // Needed for inline methods

class VTK_COMMON_EXPORT vtkTransform : public vtkLinearTransform
{
 public:
  static vtkTransform *New();
  vtkTypeRevisionMacro(vtkTransform,vtkLinearTransform);
  void PrintSelf(ostream& os, vtkIndent indent);

  void Identity();

  void Inverse();


  void Translate(double x, double y, double z) {
    this->Concatenation->Translate(x,y,z); };
  void Translate(const double x[3]) { this->Translate(x[0], x[1], x[2]); };
  void Translate(const float x[3]) { this->Translate(x[0], x[1], x[2]); };


  void RotateWXYZ(double angle, double x, double y, double z) {
    this->Concatenation->Rotate(angle,x,y,z); };
  void RotateWXYZ(double angle, const double axis[3]) {
    this->RotateWXYZ(angle, axis[0], axis[1], axis[2]); };
  void RotateWXYZ(double angle, const float axis[3]) {
    this->RotateWXYZ(angle, axis[0], axis[1], axis[2]); };


  void RotateX(double angle) { this->RotateWXYZ(angle, 1, 0, 0); };
  void RotateY(double angle) { this->RotateWXYZ(angle, 0, 1, 0); };
  void RotateZ(double angle) { this->RotateWXYZ(angle, 0, 0, 1); };


  void Scale(double x, double y, double z) {
    this->Concatenation->Scale(x,y,z); };
  void Scale(const double s[3]) { this->Scale(s[0], s[1], s[2]); };
  void Scale(const float s[3]) { this->Scale(s[0], s[1], s[2]); };


  void SetMatrix(vtkMatrix4x4 *matrix) { 
    this->SetMatrix(*matrix->Element); };
  void SetMatrix(const double elements[16]) { 
    this->Identity(); this->Concatenate(elements); };


  void Concatenate(vtkMatrix4x4 *matrix) { 
    this->Concatenate(*matrix->Element); };
  void Concatenate(const double elements[16]) {
    this->Concatenation->Concatenate(elements); };

  void Concatenate(vtkLinearTransform *transform);


  void PreMultiply() { 
    if (this->Concatenation->GetPreMultiplyFlag()) { return; }
    this->Concatenation->SetPreMultiplyFlag(1); this->Modified(); };


  void PostMultiply()  { 
    if (!this->Concatenation->GetPreMultiplyFlag()) { return; }
    this->Concatenation->SetPreMultiplyFlag(0); this->Modified(); };


  int GetNumberOfConcatenatedTransforms() {
    return this->Concatenation->GetNumberOfTransforms() + 
      (this->Input == NULL ? 0 : 1); };


  vtkLinearTransform *GetConcatenatedTransform(int i) {
    if (this->Input == NULL) {
      return (vtkLinearTransform *)this->Concatenation->GetTransform(i); }
    else if (i < this->Concatenation->GetNumberOfPreTransforms()) {
      return (vtkLinearTransform *)this->Concatenation->GetTransform(i); }
    else if (i > this->Concatenation->GetNumberOfPreTransforms()) {
      return (vtkLinearTransform *)this->Concatenation->GetTransform(i-1); } 
    else if (this->GetInverseFlag()) {
      return (vtkLinearTransform *)this->Input->GetInverse(); }
    else {
      return (vtkLinearTransform *)this->Input; } };


  void GetOrientation(double orient[3]);
  void GetOrientation(float orient[3]) {
    double temp[3]; this->GetOrientation(temp); 
    orient[0] = static_cast<float>(temp[0]); 
    orient[1] = static_cast<float>(temp[1]); 
    orient[2] = static_cast<float>(temp[2]); };
  float *GetOrientation() { 
    this->GetOrientation(this->ReturnValue); return this->ReturnValue; };


  void GetOrientationWXYZ(double wxyz[4]);
  void GetOrientationWXYZ(float wxyz[3]) {
    double temp[4]; this->GetOrientationWXYZ(temp); 
    wxyz[0]=static_cast<float>(temp[0]); 
    wxyz[1]=static_cast<float>(temp[1]); 
    wxyz[2]=static_cast<float>(temp[2]); 
    wxyz[3]=static_cast<float>(temp[3]);};
  float *GetOrientationWXYZ() { 
    this->GetOrientationWXYZ(this->ReturnValue); return this->ReturnValue; };


  void GetPosition(double pos[3]);
  void GetPosition(float pos[3]) {
    double temp[3]; this->GetPosition(temp); 
    pos[0] = static_cast<float>(temp[0]); 
    pos[1] = static_cast<float>(temp[1]); 
    pos[2] = static_cast<float>(temp[2]); };
  float *GetPosition() { 
    this->GetPosition(this->ReturnValue); return this->ReturnValue; };


  void GetScale(double scale[3]);
  void GetScale(float scale[3]) {
    double temp[3]; this->GetScale(temp); 
    scale[0] = static_cast<float>(temp[0]); 
    scale[1] = static_cast<float>(temp[1]); 
    scale[2] = static_cast<float>(temp[2]); };
  float *GetScale() { 
    this->GetScale(this->ReturnValue); return this->ReturnValue; };

  void GetInverse(vtkMatrix4x4 *inverse);

  void GetTranspose(vtkMatrix4x4 *transpose);


  void SetInput(vtkLinearTransform *input);
  vtkLinearTransform *GetInput() { return this->Input; };


  int GetInverseFlag() {
    return this->Concatenation->GetInverseFlag(); };


  void Push() { if (this->Stack == NULL) { 
                    this->Stack = vtkTransformConcatenationStack::New(); }
                this->Stack->Push(&this->Concatenation); 
                this->Modified(); };


  void Pop() { if (this->Stack == NULL) { return; }
               this->Stack->Pop(&this->Concatenation);
               this->Modified(); };

  int CircuitCheck(vtkAbstractTransform *transform);

  // Return an inverse transform which will always update itself
  // to match this transform.
  vtkAbstractTransform *GetInverse() { 
    return vtkLinearTransform::GetInverse(); }

  vtkAbstractTransform *MakeTransform();

  unsigned long GetMTime();


  void MultiplyPoint(const float in[4], float out[4]) {
    this->GetMatrix()->MultiplyPoint(in,out);};
  void MultiplyPoint(const double in[4], double out[4]) {      
    this->GetMatrix()->MultiplyPoint(in,out);};

protected:
  vtkTransform ();
  ~vtkTransform ();

  void InternalDeepCopy(vtkAbstractTransform *t);

  void InternalUpdate();

  vtkLinearTransform *Input;
  vtkTransformConcatenation *Concatenation;
  vtkTransformConcatenationStack *Stack;

  // this allows us to check whether people have been fooling
  // around with our matrix
  unsigned long MatrixUpdateMTime;

  float Point[4];
  double DoublePoint[4];
  float ReturnValue[4];
private:
  vtkTransform (const vtkTransform&);  // Not implemented
  void operator=(const vtkTransform&);  // Not implemented
};

#endif

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