text: /*=========================================================================
  
    Program:   Visualization Toolkit
    Module:    vtkImageSlice.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.
  
  =========================================================================*/
  /**
   * @class   vtkImageSlice
   * @brief   represents an image in a 3D scene
   *
   * vtkImageSlice is used to represent an image in a 3D scene.  It displays
   * the image either as a slice or as a projection from the camera's
   * perspective. Adjusting the position and orientation of the slice
   * is done by adjusting the focal point and direction of the camera,
   * or alternatively the slice can be set manually in vtkImageMapper3D.
   * The lookup table and window/leve are set in vtkImageProperty.
   * Prop3D methods such as SetPosition() and RotateWXYZ() change the
   * position and orientation of the data with respect to VTK world
   * coordinates.
   * @par Thanks:
   * Thanks to David Gobbi at the Seaman Family MR Centre and Dept. of Clinical
   * Neurosciences, Foothills Medical Centre, Calgary, for providing this class.
   * @sa
   * vtkImageMapper3D vtkImageProperty vtkProp3D
   */
  
  #ifndef vtkImageSlice_h
  #define vtkImageSlice_h
  
  #include "vtkProp3D.h"
  #include "vtkRenderingCoreModule.h" // For export macro
  
  class vtkRenderer;
  class vtkPropCollection;
  class vtkImageProperty;
  class vtkImageMapper3D;
  
  class VTKRENDERINGCORE_EXPORT vtkImageSlice : public vtkProp3D
  {
  public:
    vtkTypeMacro(vtkImageSlice, vtkProp3D);
    void PrintSelf(ostream& os, vtkIndent indent) override;
  
    /**
     * Creates an Image with the following defaults: origin(0,0,0)
     * position=(0,0,0) scale=1 visibility=1 pickable=1 dragable=1
     * orientation=(0,0,0).
     */
    static vtkImageSlice* New();
  
    //@{
    /**
     * Set/Get the mapper.
     */
    void SetMapper(vtkImageMapper3D* mapper);
    vtkGetObjectMacro(Mapper, vtkImageMapper3D);
    //@}
  
    //@{
    /**
     * Set/Get the image display properties.
     */
    void SetProperty(vtkImageProperty* property);
    virtual vtkImageProperty* GetProperty();
    //@}
  
    /**
     * Update the rendering pipeline by updating the ImageMapper
     */
    void Update();
  
    //@{
    /**
     * Get the bounds - either all six at once
     * (xmin, xmax, ymin, ymax, zmin, zmax) or one at a time.
     */
    double* GetBounds() override;
    void GetBounds(double bounds[6]) { this->vtkProp3D::GetBounds(bounds); }
    double GetMinXBound();
    double GetMaxXBound();
    double GetMinYBound();
    double GetMaxYBound();
    double GetMinZBound();
    double GetMaxZBound();
    //@}
  
    /**
     * Return the MTime also considering the property etc.
     */
    vtkMTimeType GetMTime() override;
  
    /**
     * Return the mtime of anything that would cause the rendered image to
     * appear differently. Usually this involves checking the mtime of the
     * prop plus anything else it depends on such as properties, mappers,
     * etc.
     */
    vtkMTimeType GetRedrawMTime() override;
  
    //@{
    /**
     * Force the actor to be treated as translucent.
     */
    vtkGetMacro(ForceTranslucent, bool);
    vtkSetMacro(ForceTranslucent, bool);
    vtkBooleanMacro(ForceTranslucent, bool);
    //@}
  
    /**
     * Shallow copy of this vtkImageSlice. Overloads the virtual vtkProp method.
     */
    void ShallowCopy(vtkProp* prop) override;
  
    /**
     * For some exporters and other other operations we must be
     * able to collect all the actors, volumes, and images. These
     * methods are used in that process.
     */
    void GetImages(vtkPropCollection*);
  
    //@{
    /**
     * Support the standard render methods.
     */
    int RenderOverlay(vtkViewport* viewport) override;
    int RenderOpaqueGeometry(vtkViewport* viewport) override;
    int RenderTranslucentPolygonalGeometry(vtkViewport* viewport) override;
    //@}
  
    /**
     * Internal method, should only be used by rendering.
     * This method will always return 0 unless ForceTranslucent is On.
     */
    vtkTypeBool HasTranslucentPolygonalGeometry() override;
  
    /**
     * This causes the image and its mapper to be rendered. Note that a side
     * effect of this method is that the pipeline will be updated.
     */
    virtual void Render(vtkRenderer*);
  
    /**
     * Release any resources held by this prop.
     */
    void ReleaseGraphicsResources(vtkWindow* win) override;
  
    /**
     * For stacked image rendering, set the pass.  The first pass
     * renders just the backing polygon, the second pass renders
     * the image, and the third pass renders the depth buffer.
     * Set to -1 to render all of these in the same pass.
     */
    void SetStackedImagePass(int pass);
  
  protected:
    vtkImageSlice();
    ~vtkImageSlice() override;
  
    vtkImageMapper3D* Mapper;
    vtkImageProperty* Property;
  
    bool ForceTranslucent;
  
  private:
    vtkImageSlice(const vtkImageSlice&) = delete;
    void operator=(const vtkImageSlice&) = delete;
  };
  
  #endif
  