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88 lines
2.9 KiB
88 lines
2.9 KiB
/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkFollower.h,v $
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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// .NAME vtkFollower - a subclass of actor that always faces the camera
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// .SECTION Description
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// vtkFollower is a subclass of vtkActor that always follows its specified
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// camera. More specifically it will not change its position or scale,
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// but it will continually update its orientation so that it is right side
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// up and facing the camera. This is typically used for text labels in a
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// scene. All of the adjustments that can be made to an actor also will
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// take effect with a follower. So, if you change the orientation of the
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// follower by 90 degrees, then it will follow the camera, but be off by
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// 90 degrees.
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// .SECTION see also
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// vtkActor vtkCamera
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#ifndef __vtkFollower_h
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#define __vtkFollower_h
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#include "vtkActor.h"
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class vtkCamera;
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class VTK_RENDERING_EXPORT vtkFollower : public vtkActor
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{
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public:
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vtkTypeRevisionMacro(vtkFollower,vtkActor);
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void PrintSelf(ostream& os, vtkIndent indent);
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// Description:
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// Creates a follower with no camera set
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static vtkFollower *New();
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// Description:
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// Set/Get the camera to follow. If this is not set, then the follower
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// won't know who to follow.
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virtual void SetCamera(vtkCamera*);
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vtkGetObjectMacro(Camera,vtkCamera);
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// Description:
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// This causes the actor to be rendered. It in turn will render the actor's
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// property, texture map and then mapper. If a property hasn't been
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// assigned, then the actor will create one automatically.
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virtual int RenderOpaqueGeometry(vtkViewport *viewport);
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virtual int RenderTranslucentGeometry(vtkViewport *viewport);
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virtual void Render(vtkRenderer *ren);
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// Description:
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// Copy the follower's composite 4x4 matrix into the matrix provided.
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virtual void GetMatrix(vtkMatrix4x4 *m);
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virtual void GetMatrix(double m[16]);
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virtual vtkMatrix4x4* GetMatrix()
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{return this->vtkActor::GetMatrix();}
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// Description:
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// Shallow copy of a follower. Overloads the virtual vtkProp method.
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void ShallowCopy(vtkProp *prop);
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protected:
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vtkFollower();
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~vtkFollower();
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vtkCamera *Camera;
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vtkActor *Device;
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private:
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// hide the two parameter Render() method from the user and the compiler.
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virtual void Render(vtkRenderer *, vtkMapper *) {};
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private:
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vtkFollower(const vtkFollower&); // Not implemented.
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void operator=(const vtkFollower&); // Not implemented.
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};
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#endif
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