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/*=========================================================================
Program: Visualization Toolkit
Module: $RCSfile: vtkInteractorStyleTerrain.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.
=========================================================================*/
// .NAME vtkInteractorStyleTerrain - manipulate camera in scene with natural view up (e.g., terrain)
// .SECTION Description
// vtkInteractorStyleTerrain is used to manipulate a camera which is viewing
// a scene with a natural view up, e.g., terrain. The camera in such a
// scene is manipulated by specifying azimuth (angle around the view
// up vector) and elevation (the angle from the horizon).
//
// The mouse binding for this class is as follows. Left mouse click followed
// rotates the camera around the focal point using both elevation and azimuth
// invocations on the camera. Left mouse motion in the horizontal direction
// results in azimuth motion; left mouse motion in the vertical direction
// results in elevation motion. Therefore, diagonal motion results in a
// combination of azimuth and elevation. (If the shift key is held during
// motion, then only one of elevation or azimuth is invoked, depending on the
// whether the mouse motion is primarily horizontal or vertical.) Middle
// mouse button pans the camera across the scene (again the shift key has a
// similar effect on limiting the motion to the vertical or horizontal
// direction. The right mouse is used to dolly (e.g., a type of zoom) towards
// or away from the focal point.
//
// The class also supports some keypress events. The "r" key resets the
// camera. The "e" key invokes the exit callback and by default exits the
// program. The "f" key sets a new camera focal point and flys towards that
// point. The "u" key invokes the user event. The "3" key toggles between
// stereo and non-stero mode. The "l" key toggles on/off a latitude/longitude
// markers that can be used to estimate/control position.
//
// .SECTION See Also
// vtkInteractorObserver vtkInteractorStyle vtk3DWidget
#ifndef __vtkInteractorStyleTerrain_h
#define __vtkInteractorStyleTerrain_h
#include "vtkInteractorStyle.h"
class vtkPolyDataMapper;
class vtkSphereSource;
class vtkExtractEdges;
class VTK_RENDERING_EXPORT vtkInteractorStyleTerrain : public vtkInteractorStyle
{
public:
// Description:
// Instantiate the object.
static vtkInteractorStyleTerrain *New();
vtkTypeRevisionMacro(vtkInteractorStyleTerrain,vtkInteractorStyle);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Event bindings controlling the effects of pressing mouse buttons
// or moving the mouse.
virtual void OnMouseMove();
virtual void OnLeftButtonDown();
virtual void OnLeftButtonUp();
virtual void OnMiddleButtonDown();
virtual void OnMiddleButtonUp();
virtual void OnRightButtonDown();
virtual void OnRightButtonUp();
// Description:
// Override the "fly-to" (f keypress) for images.
virtual void OnChar();
// These methods for the different interactions in different modes
// are overridden in subclasses to perform the correct motion.
virtual void Rotate();
virtual void Pan();
virtual void Dolly();
// Description:
// Turn on/off the latitude/longitude lines.
vtkSetMacro(LatLongLines,int);
vtkGetMacro(LatLongLines,int);
vtkBooleanMacro(LatLongLines,int);
protected:
vtkInteractorStyleTerrain();
~vtkInteractorStyleTerrain();
// Internal helper attributes
int LatLongLines;
vtkSphereSource *LatLongSphere;
vtkPolyDataMapper *LatLongMapper;
vtkActor *LatLongActor;
vtkExtractEdges *LatLongExtractEdges;
void SelectRepresentation();
void CreateLatLong();
double MotionFactor;
private:
vtkInteractorStyleTerrain(const vtkInteractorStyleTerrain&); // Not implemented.
void operator=(const vtkInteractorStyleTerrain&); // Not implemented.
};
#endif
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