91 lines
2.7 KiB
C++
91 lines
2.7 KiB
C++
// viewer_lookat.hxx -- class for managing a "look at" viewer in
|
|
// the flightgear world.
|
|
//
|
|
// Written by Curtis Olson, started October 2000.
|
|
//
|
|
// Copyright (C) 2000 Curtis L. Olson - curt@flightgear.org
|
|
//
|
|
// This program is free software; you can redistribute it and/or
|
|
// modify it under the terms of the GNU General Public License as
|
|
// published by the Free Software Foundation; either version 2 of the
|
|
// License, or (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful, but
|
|
// WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
// General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program; if not, write to the Free Software
|
|
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
//
|
|
// $Id$
|
|
|
|
|
|
#ifndef _VIEWER_LOOKAT_HXX
|
|
#define _VIEWER_LOOKAT_HXX
|
|
|
|
|
|
#ifndef __cplusplus
|
|
# error This library requires C++
|
|
#endif
|
|
|
|
|
|
#include "viewer.hxx"
|
|
|
|
|
|
// Define a structure containing view information
|
|
class FGViewerLookAt: public FGViewer {
|
|
|
|
private:
|
|
|
|
// up vector for the view (usually point straight up through the
|
|
// top of the aircraft
|
|
sgVec3 view_up;
|
|
|
|
// the vector pointing straight out the nose of the aircraft
|
|
sgVec3 view_forward;
|
|
|
|
// Transformation matrix for the view direction offset relative to
|
|
// the AIRCRAFT matrix
|
|
sgMat4 VIEW_OFFSET;
|
|
|
|
// sg versions of our friendly matrices
|
|
sgMat4 LOCAL, TRANS, LARC_TO_SSG;
|
|
|
|
// Update the view volume, position, and orientation
|
|
void update();
|
|
|
|
public:
|
|
|
|
// Constructor
|
|
FGViewerLookAt( void );
|
|
|
|
// Destructor
|
|
~FGViewerLookAt( void );
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// setter functions
|
|
//////////////////////////////////////////////////////////////////////
|
|
inline void set_view_forward( sgVec3 vf ) {
|
|
set_dirty();
|
|
sgCopyVec3( view_forward, vf );
|
|
}
|
|
inline void set_view_up( sgVec3 vf ) {
|
|
set_dirty();
|
|
sgCopyVec3( view_up, vf );
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// accessor functions
|
|
//////////////////////////////////////////////////////////////////////
|
|
inline float *get_view_forward() { return view_forward; }
|
|
inline float *get_view_up() { return view_up; }
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// derived values accessor functions
|
|
//////////////////////////////////////////////////////////////////////
|
|
};
|
|
|
|
|
|
#endif // _VIEWER_LOOKAT_HXX
|