SoTrackballDragger.h

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/*
 *
 *  Copyright (C) 2000 Silicon Graphics, Inc.  All Rights Reserved. 
 *
 *  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.
 *
 *  Further, this software is distributed without any warranty that it is
 *  free of the rightful claim of any third person regarding infringement
 *  or the like.  Any license provided herein, whether implied or
 *  otherwise, applies only to this software file.  Patent licenses, if
 *  any, provided herein do not apply to combinations of this program with
 *  other software, or any other product whatsoever.
 * 
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 *  Mountain View, CA  94043, or:
 * 
 *  http://www.sgi.com 
 * 
 *  For further information regarding this notice, see: 
 * 
 *  http://oss.sgi.com/projects/GenInfo/NoticeExplan/
 *
 */
 
 
/*
 * Copyright (C) 1990,91   Silicon Graphics, Inc.
 *
 _______________________________________________________________________
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 |
 |   $Revision: 1.1.1.1 $
 |
 |   Description:
 |      This file defines the trackball dragger class.
 |
 | NOTE TO DEVELOPERS:
 |     For info about the structure of SoTrackballDragger:
 |     [1] compile: /usr/share/src/Inventor/samples/ivNodeKitStructure
 |     [2] type:    ivNodeKitStructure SoTrackballDragger.
 |     [3] The program prints a diagram of the scene graph and a table with 
 |         information about each part.
 |
 |  The following parts in this dragger are created at construction time.
 |  'ResourceName' corresponds to the name of the default geometry for the
 |  part. The dragger's constructor gets the scene graph for 'ResourceName'
 |  by querying the global dictionary ( SoDB::getByName("ResourceName"); ).  
 |
 |  Resource Name:                           Part Name:
 |
 |  trackballRotator                       - rotator     
 |  trackballRotatorActive                 - rotatorActive     
 |  trackballXRotator                      - XRotator    
 |  trackballXRotatorActive                - XRotatorActive    
 |  trackballYRotator,                     - YRotator   
 |  trackballYRotatorActive,               - YRotatorActive   
 |  trackballZRotator                      - ZRotator  
 |  trackballZRotatorActive                - ZRotatorActive  
 |  trackballUserAxis                      - userAxis    
 |  trackballUserAxisActive                - userAxisActive    
 |  trackballUserRotator                   - userRotator 
 |  trackballUserRotatorActive             - userRotatorActive 
 |
 |   Author(s): Paul Isaacs, David Mott
 |
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 _______________________________________________________________________
 */
 
#ifndef  _SO_TRACKBALL_DRAGGER_
#define  _SO_TRACKBALL_DRAGGER_
 
#include <Inventor/SbLinear.h>
#include <Inventor/SbTime.h>
#include <Inventor/sensors/SoSensor.h>
#include <Inventor/draggers/SoDragger.h>
#include <Inventor/fields/SoSFVec3f.h>
#include <Inventor/fields/SoSFRotation.h>
 
class SbDict;
class SoGroup;
class SoRotation;
class SbProjector;
class SbSphereProjector;
class SbCylinderProjector;
class SoFieldSensor;
class SoTimerSensor;
 


 
class INVENTOR_API SoTrackballDragger : public SoDragger {
 
    SO_KIT_HEADER(SoTrackballDragger);

    SO_KIT_CATALOG_ENTRY_HEADER(surroundScale);
    SO_KIT_CATALOG_ENTRY_HEADER(antiSquish);
 
    SO_KIT_CATALOG_ENTRY_HEADER(rotatorSwitch);
    SO_KIT_CATALOG_ENTRY_HEADER(rotator);
    SO_KIT_CATALOG_ENTRY_HEADER(rotatorActive);
    SO_KIT_CATALOG_ENTRY_HEADER(XRotatorSwitch);
    SO_KIT_CATALOG_ENTRY_HEADER(XRotator);
    SO_KIT_CATALOG_ENTRY_HEADER(XRotatorActive);
    SO_KIT_CATALOG_ENTRY_HEADER(YRotatorSwitch);
    SO_KIT_CATALOG_ENTRY_HEADER(YRotator);
    SO_KIT_CATALOG_ENTRY_HEADER(YRotatorActive);
    SO_KIT_CATALOG_ENTRY_HEADER(ZRotatorSwitch);
    SO_KIT_CATALOG_ENTRY_HEADER(ZRotator);
    SO_KIT_CATALOG_ENTRY_HEADER(ZRotatorActive);

    SO_KIT_CATALOG_ENTRY_HEADER(userAxisRotation);
 
    SO_KIT_CATALOG_ENTRY_HEADER(userAxisSwitch);
    SO_KIT_CATALOG_ENTRY_HEADER(userAxis);
    SO_KIT_CATALOG_ENTRY_HEADER(userAxisActive);
    SO_KIT_CATALOG_ENTRY_HEADER(userRotatorSwitch);
    SO_KIT_CATALOG_ENTRY_HEADER(userRotator);
    SO_KIT_CATALOG_ENTRY_HEADER(userRotatorActive);
 
  public:

    SoTrackballDragger();
 
    SoSFRotation rotation;
    SoSFVec3f scaleFactor;

    bool isAnimationEnabled() { return animationEnabled; }
    void setAnimationEnabled( bool newVal );
 
  SoINTERNAL public:
    static void         initClass();    
 
  protected:

    static void startCB(void *, SoDragger *);
    static void motionCB(void *, SoDragger *);
    static void finishCB(void *, SoDragger *);
    
    SoFieldSensor *rotFieldSensor;
    SoFieldSensor *scaleFieldSensor;
    static void fieldSensorCB( void *, SoSensor * );
    static void valueChangedCB( void *, SoDragger * );

    static void metaKeyChangeCB(void *, SoDragger *);

    void        dragStart();
    void        drag();
    void        dragFinish();
 
    virtual void setAllPartsActive( bool onOrOff );

    virtual bool setUpConnections( bool onOff, bool doItAlways = FALSE );
 
    virtual void setDefaultOnNonWritingFields();
 
    virtual ~SoTrackballDragger();
 
    // Results of refactoring (MMS Bug: 57374): 

    SbSphereProjector   *sphereProj;
    SbCylinderProjector *stripeProj;
 
    bool                ctlDown, shftDown; 
 
    enum State
        { INACTIVE, FREE_ROTATE, X_ROTATE, Y_ROTATE, Z_ROTATE,
          SCALE, USER_AXIS_ADJUST, USER_AXIS_ROTATE, SPINNING };
    State               currentState;
 

    virtual void initDragState();

    virtual SbProjector* initSphereProjector(SbVec3f center, float radius, SbVec3f startWorkSpaceHitPt, SbMatrix workingSpace);

    virtual SbProjector* initStripeProjector(SbLine  axis,   float radius, SbVec3f startWorkSpaceHitPt, SbMatrix workingSpace);

    virtual void getSphereDeltaRotation(SbRotation &deltaRot, SbVec3f &newHitPt, SbVec3f prevHitPt, SbMatrix workingSpace);

    virtual void getStripeDeltaRotation(SbRotation &deltaRot, SbVec3f &newHitPt, SbVec3f prevHitPt, SbMatrix workingSpace);
 
  private:
   
    SbVec3f             constrainedAxis;   
    SbVec3f             userAxisVec;       
    
    SbVec3f             startWorldHitPt;   
    SbVec3f             prevWorldHitPt;    
    SbMatrix            prevMotionMatrix;  

    void initSphereProjectorInternal(SbVec3f center, float radius, SbVec3f startWorkSpaceHitPt, SbMatrix workingSpace);

    void initStripeProjectorInternal(SbLine  axis,   float radius, SbVec3f startWorkSpaceHitPt, SbMatrix workingSpace);
 
    void        setHighlights();
 
    bool                rotateDrag();
    bool                scaleDrag();
    bool                userStripeDrag();
    
    static const unsigned char geomBuffer[];

    bool animationEnabled;
    SbTime          prevTime;
    SbTime          spinTime;
    SbTime          scheduleRate;
    SoTimerSensor   *spinSensor;
    SbRotation      *rotBuffer;
    SbTime          *timeBuffer;
    int             firstIndex, lastIndex;
    SbVec3f         averageAxis;
    float           angleVelocity;
    bool            computeAverage;

    static  void spinSensorCB(void *, SoSensor *);
    void    spinAnimate();
    void    resetSpinStuff();

    bool    wasSpinningAtDragStart;
};
 
#endif /* _SO_TRACKBALL_DRAGGER_ */