vtkLightRepresentation.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkLightRepresentation.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 vtkLightRepresentation_h
#define vtkLightRepresentation_h
 
#include "vtkInteractionWidgetsModule.h" // For export macro
#include "vtkNew.h"                      // Needed for vtkNew
#include "vtkWidgetRepresentation.h"
 
class vtkActor;
class vtkBox;
class vtkCellPicker;
class vtkConeSource;
class vtkLineSource;
class vtkPointHandleRepresentation3D;
class vtkPolyDataMapper;
class vtkProperty;
class vtkSphereSource;
 
class VTKINTERACTIONWIDGETS_EXPORT vtkLightRepresentation : public vtkWidgetRepresentation
{
public:
  static vtkLightRepresentation* New();
  vtkTypeMacro(vtkLightRepresentation, vtkWidgetRepresentation);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
 
  vtkSetMacro(Positional, bool);
  vtkGetMacro(Positional, bool);
  vtkBooleanMacro(Positional, bool);
 
 
  void SetLightPosition(double pos[3]);
  vtkGetVector3Macro(LightPosition, double);
 
 
  void SetFocalPoint(double pos[3]);
  vtkGetVector3Macro(FocalPoint, double);
 
 
  void SetConeAngle(double angle);
  vtkGetMacro(ConeAngle, double);
 
 
  void SetLightColor(double* color);
  double* GetLightColor() VTK_SIZEHINT(3);
 
  enum
  {
    Outside = 0,
    MovingLight,
    MovingFocalPoint,
    MovingPositionalFocalPoint,
    ScalingConeAngle
  };
 
 
  vtkSetClampMacro(InteractionState, int, Outside, ScalingConeAngle);
 
 
  vtkGetObjectMacro(Property, vtkProperty);
 
 
  void BuildRepresentation() override;
  int ComputeInteractionState(int X, int Y, int modify = 0) override;
  void StartWidgetInteraction(double eventPosition[2]) override;
  void WidgetInteraction(double eventPosition[2]) override;
  double* GetBounds() override;
 
 
  void ReleaseGraphicsResources(vtkWindow* w) override;
  int RenderOpaqueGeometry(vtkViewport* viewport) override;
  int RenderTranslucentPolygonalGeometry(vtkViewport* viewport) override;
 
protected:
  vtkLightRepresentation();
  ~vtkLightRepresentation() override;
 
  virtual void SizeHandles();
  virtual void UpdateSources();
  virtual void ScaleConeAngle(double* pickPoint, double* lastPickPoint);
 
  vtkNew<vtkProperty> Property;
  vtkNew<vtkBox> BoundingBox;
  vtkCellPicker* LastPicker;
  double LastScalingDistance2 = -1;
  double LastEventPosition[3] = { 0, 0, 0 };
 
  // the Sphere
  vtkNew<vtkSphereSource> Sphere;
  vtkNew<vtkActor> SphereActor;
  vtkNew<vtkPolyDataMapper> SphereMapper;
  vtkNew<vtkCellPicker> SpherePicker;
 
  // the Cone
  vtkNew<vtkConeSource> Cone;
  vtkNew<vtkActor> ConeActor;
  vtkNew<vtkPolyDataMapper> ConeMapper;
  vtkNew<vtkCellPicker> ConePicker;
 
  // the Line
  vtkNew<vtkLineSource> Line;
  vtkNew<vtkActor> LineActor;
  vtkNew<vtkPolyDataMapper> LineMapper;
  vtkNew<vtkCellPicker> LinePicker;
 
  double LightPosition[3] = { 0, 0, 1 };
  double FocalPoint[3] = { 0, 0, 0 };
  double ConeAngle = 30;
  bool Positional = false;
 
private:
  vtkLightRepresentation(const vtkLightRepresentation&) = delete;
  void operator=(const vtkLightRepresentation&) = delete;
};
 
#endif