VRS - The Virtual Rendering System

version 3.3

lookatmanipulator.h

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 /**********************************************************************
 VRS - The Virtual Rendering System
 Copyright (C) 2001 Computer Graphics Systems Group at the 
 Hasso-Plattner-Institute, Potsdam, Germany.
 This library is free software; you can redistribute it and/or 
 modify it under the terms of the GNU Lesser General Public 
 License as published by the Free Software Foundation; either 
 version 2.1 of the License, or (at your option) any later version.
 This library 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 Lesser General Public License for more details.
 You should have received a copy of the GNU Lesser+ General Public
 License along with this library; if not, write to the FreeSoftware 
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA, 02111-1307, USA.
 **********************************************************************/
// $Id: lookatmanipulator.h 6014 2007-08-09 07:51:16Z Konstantin_Baumann $
// $Date: 2007-08-09 09:51:16 +0200 (Thu, 09 Aug 2007) $
// $Revision: 6014 $
// $State$
// $Author: Konstantin_Baumann $
//
// $Log$
// Revision 1.24  2005/01/20 08:36:33  maass
// add panning mode. Of course there is a panemanipulator as well, but this variant changes the lookat (the camera) directly.
//
// Revision 1.23  2005/01/03 01:43:10  klimetschek
// - modified win32 project layout, splitted vrs.vcproj into vrs_container, vrs_core, vrs_sg, vrs_image, vrs_opengl and vrs_io
// - removed vrs.vcproj
// minor things:
// - added all glutexamples to vrs4glut.sln
// - fixed some problems in glutexamples
// - removed all project references from all VS projects (using solution wide project dependencies instead)
//
// Revision 1.22  2004/10/28 14:16:01  basch
// Class comment changed (Doxygen style)
//
// Revision 1.21  2004/03/12 16:28:41  baumann
// macros VRS_NAMESPACE_BEGIN/_END expanded and removed
//
// Revision 1.20  2004/01/19 11:43:58  baumann
// serialization mechanism improved
//
// Revision 1.19  2004/01/19 07:28:03  baumann
// serialization mechanism improved
//
// Revision 1.18  2003/11/07 14:19:25  kirsch
// removed leading underscore from include guards
//
// Revision 1.17  2003/02/24 10:05:57  baumann
// changed return type of BehaviorNode::handle() and Manipulator::drag*()
// from "int" to "BehaviorNode::InvalidationHint"
//
// Revision 1.16  2002/10/07 12:13:06  kirsch
// code cleanup
//
// Revision 1.15  2002/07/02 15:23:48  baumann
// non-persistent containers now have the prefix NonPersistent, e.g. NonPersistentArray<T>
// persistent containers now have no prefix, e.g. Array<T>
//
// Revision 1.14  2002/05/03 15:13:08  rozinat
// persistency update: constructor 'protected'
//
// Revision 1.13  2002/04/24 20:31:25  rozinat
// persistency update: changed Array to PersistentArray
//
// Revision 1.12  2002/03/04 12:04:17  kersting
// directory structure changes
//
// Revision 1.11  2002/03/03 21:44:26  kosta
// VRS_TYPEINFO-macro rewritten
//
// Revision 1.10  2002/02/19 10:34:20  kosta
// undone all changes since 2002-02-15
//
// Revision 1.7  2002/02/05 07:48:26  kosta
// new persistency macros:
//     VRS_SERIALIZABLE(CLASS_NAME);
//     VRS_SERIALIZABLE_ABSTRACT_CLASS(CLASS_NAME);
//     VRS_SERIALIZABLE_NO_SO_CLASS(CLASS_NAME)
//
// Revision 1.6  2002/02/04 13:07:19  kosta
// VRS_SERIALIZABLE macros completely rewritten
//
// Revision 1.5  2002/01/15 16:25:55  kosta
// macros rewritten for a better namespace support
//
// Revision 1.4  2001/11/13 16:36:31  kirsch
// changed line feed to unix style (removed control-M)
//
// Revision 1.3  2001/07/13 08:57:42  kersting
// enum name changes
//
// Revision 1.2  2001/07/04 13:44:00  kersting
// changes due to InputEvent enumeration changes
//
// Revision 1.1.1.1  2001/06/08 08:09:21  kirsch
// imported alpha-version by olli 
//


#ifndef VRS_LOOKATMANIPULATOR_H
#define VRS_LOOKATMANIPULATOR_H

#include <vrs/container/array.h>
#include <vrs/lookat.h>
#include <vrs/vector.h>
#include <vrs/sg/manipulator.h>

namespace VRS {

class VRS_CORE_API LookAtManipulator : public Manipulator {
    
public:
    enum Mode { Examine, Peer, Zoom, Pane };
    VRS_SERIALIZABLE_CLASS_ENUM(Mode);

    LookAtManipulator(
        LookAt* target,
        Mode mode,
        InputEvent::Button button,
        InputEvent::Modifier must_modifier = InputEvent::NoModifier,
        InputEvent::Modifier must_not_modifier = InputEvent::NoModifier
        );
        
    void setLookAt(LookAt* lookatTf);
    LookAt* getLookAt() const;
    
    void setMode(LookAtManipulator::Mode manipmode);
    LookAtManipulator::Mode getMode() const;
    void setSensitivity(int mode, double sensitivity);
    double getSensitivity(int mode) const;
    virtual BehaviorNode::InvalidationHint dragStart(int x, int y, ButtonEvent*);
    virtual BehaviorNode::InvalidationHint dragMotion(int x, int y, MotionEvent*);
    virtual BehaviorNode::InvalidationHint dragEnd(int x, int y, ButtonEvent*);
    VRS_TYPEINFO(LookAtManipulator, Manipulator);
    VRS_SERIALIZABLE(LookAtManipulator);

protected:
        LookAtManipulator();
        
private:
    SO<LookAt> lookat_;
    SO<Array<double> > sensitivity_;
    LookAtManipulator::Mode mode_;
    
    int currentX_;
    int currentY_;
    double azimuth_;
    double altitude_;
    double zoom_;
    Vector from_;
    Vector to_;
    Vector up_;
    Vector left_;
    
    bool initialized_;
};

inline void LookAtManipulator::setLookAt(LookAt* l) { lookat_ = l; modified(); }
inline LookAt* LookAtManipulator::getLookAt() const { return lookat_; }

inline void LookAtManipulator::setSensitivity(int i, double s) { (*sensitivity_)[i] = s; modified(); }
inline double LookAtManipulator::getSensitivity(int i) const { return (*sensitivity_)[i]; }

} // namespace VRS

#endif // VRS_LOOKATMANIPULATOR_H

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