VTK  9.3.0
vtkFollower.h
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1 // SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
2 // SPDX-License-Identifier: BSD-3-Clause
23 #ifndef vtkFollower_h
24 #define vtkFollower_h
25 
26 #include "vtkActor.h"
27 #include "vtkRenderingCoreModule.h" // For export macro
28 
29 VTK_ABI_NAMESPACE_BEGIN
30 class vtkCamera;
31 
32 class VTKRENDERINGCORE_EXPORT vtkFollower : public vtkActor
33 {
34 public:
35  vtkTypeMacro(vtkFollower, vtkActor);
36  void PrintSelf(ostream& os, vtkIndent indent) override;
37 
41  static vtkFollower* New();
42 
44 
48  virtual void SetCamera(vtkCamera*);
49  vtkGetObjectMacro(Camera, vtkCamera);
51 
53 
58  int RenderOpaqueGeometry(vtkViewport* viewport) override;
60  virtual void Render(vtkRenderer* ren);
62 
67 
72  void ComputeMatrix() override;
73 
77  void ShallowCopy(vtkProp* prop) override;
78 
79 protected:
81  ~vtkFollower() override;
82 
85 
86  // Internal matrices to avoid New/Delete for performance reasons
88 
89 private:
90  vtkFollower(const vtkFollower&) = delete;
91  void operator=(const vtkFollower&) = delete;
92 
93  // hide the two parameter Render() method from the user and the compiler.
94  void Render(vtkRenderer*, vtkMapper*) override {}
95 };
96 
97 VTK_ABI_NAMESPACE_END
98 #endif
represents an object (geometry & properties) in a rendered scene
Definition: vtkActor.h:41
virtual void Render(vtkRenderer *, vtkMapper *)
This causes the actor to be rendered.
Definition: vtkActor.h:82
a virtual camera for 3D rendering
Definition: vtkCamera.h:41
a subclass of actor that always faces the camera
Definition: vtkFollower.h:33
int RenderTranslucentPolygonalGeometry(vtkViewport *viewport) override
This causes the actor to be rendered.
static vtkFollower * New()
Creates a follower with no camera set.
void ComputeMatrix() override
Generate the matrix based on ivars.
int RenderOpaqueGeometry(vtkViewport *viewport) override
This causes the actor to be rendered.
vtkActor * Device
Definition: vtkFollower.h:84
void ReleaseGraphicsResources(vtkWindow *) override
Release any graphics resources associated with this vtkProp3DFollower.
void PrintSelf(ostream &os, vtkIndent indent) override
Methods invoked by print to print information about the object including superclasses.
~vtkFollower() override
virtual void Render(vtkRenderer *ren)
This causes the actor to be rendered.
vtkCamera * Camera
Definition: vtkFollower.h:83
virtual void SetCamera(vtkCamera *)
Set/Get the camera to follow.
vtkMatrix4x4 * InternalMatrix
Definition: vtkFollower.h:87
void ShallowCopy(vtkProp *prop) override
Shallow copy of a follower.
a simple class to control print indentation
Definition: vtkIndent.h:29
abstract class specifies interface to map data to graphics primitives
Definition: vtkMapper.h:77
represent and manipulate 4x4 transformation matrices
Definition: vtkMatrix4x4.h:31
abstract superclass for all actors, volumes and annotations
Definition: vtkProp.h:46
abstract specification for renderers
Definition: vtkRenderer.h:62
abstract specification for Viewports
Definition: vtkViewport.h:45
window superclass for vtkRenderWindow
Definition: vtkWindow.h:28