vtkPerspectiveTransform.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkPerspectiveTransform.h,v $

  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 __vtkPerspectiveTransform_h
#define __vtkPerspectiveTransform_h

#include "vtkHomogeneousTransform.h"

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

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

  void Identity() { this->Concatenation->Identity(); this->Modified(); };

  void Inverse() { this->Concatenation->Inverse(); this->Modified(); };


  void AdjustViewport(double oldXMin, double oldXMax, 
                      double oldYMin, double oldYMax,
                      double newXMin, double newXMax, 
                      double newYMin, double newYMax);


  void AdjustZBuffer(double oldNearZ, double oldFarZ,
                     double newNearZ, double newFarZ);


  void Ortho(double xmin, double xmax, double ymin, double ymax, 
             double znear, double zfar);


  void Frustum(double xmin, double xmax, double ymin, double ymax, 
               double znear, double zfar);

  void Perspective(double angle, double aspect, double znear, double zfar);

  void Shear(double dxdz, double dydz, double zplane);

  void Stereo(double angle, double focaldistance);


  void SetupCamera(const double position[3], const double focalpoint[3],
                   const double viewup[3]);

  void SetupCamera(double p0, double p1, double p2,
                   double fp0, double fp1, double fp2,
                   double vup0, double vup1, double vup2);


  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(vtkHomogeneousTransform *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); };


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


  void SetInput(vtkHomogeneousTransform *input);
  vtkHomogeneousTransform *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(); };

  vtkAbstractTransform *MakeTransform();

  int CircuitCheck(vtkAbstractTransform *transform);

  unsigned long GetMTime();

protected:
  vtkPerspectiveTransform();
  ~vtkPerspectiveTransform();

  void InternalDeepCopy(vtkAbstractTransform *t);
  void InternalUpdate();

  vtkHomogeneousTransform *Input;
  vtkTransformConcatenation *Concatenation;
  vtkTransformConcatenationStack *Stack;

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


#endif

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