Linux Certif

Toute la documentation sur la certification Linux LPI

SoTrackballDragger.3coin2

NAME

SoTrackballDragger -

The SoTrackballDragger provides the end-user with rotation and scaling interaction possibilities.

Here's how the dragger looks with its default geometry in the inactive state:.

SYNOPSIS

#include <Inventor/draggers/SoTrackballDragger.h>

Inherits SoDragger.

Public Member Functions

SoTrackballDragger (void)

SbBool isAnimationEnabled (void)

void setAnimationEnabled (SbBool newval)

Static Public Member Functions

static void initClass (void)

Public Attributes

SoSFRotation rotation

SoSFVec3f scaleFactor

Protected Member Functions

~SoTrackballDragger ()

virtual SbBool setUpConnections (SbBool onoff, SbBool doitalways=0)

virtual void setDefaultOnNonWritingFields (void)

void dragStart (void)

void drag (void)

void dragFinish (void)

void setAllPartsActive (SbBool onoroff)

Static Protected Member Functions

static void startCB (void *f, SoDragger *d)

static void motionCB (void *f, SoDragger *d)

static void finishCB (void *f, SoDragger *d)

static void metaKeyChangeCB (void *f, SoDragger *d)

static void fieldSensorCB (void *f, SoSensor *s)

static void valueChangedCB (void *f, SoDragger *d)

Protected Attributes

SoFieldSensor * rotFieldSensor

SoFieldSensor * scaleFieldSensor

Friends

class SoTrackballDraggerP

Detailed Description

The SoTrackballDragger provides the end-user with rotation and scaling interaction possibilities.

Here's how the dragger looks with its default geometry in the inactive state:.

  

The dragger has three 'bands' around a transparent sphere, which when clicked and dragged will rotate around the three principal axes. In addition, the user can define his own rotation axis by holding down a SHIFT key while clicking with the left mouse button and dragging. A new, distinctively colored axis and dragger band will be then be added.

Free-form rotation on the sphere can be done by clicking and dragging outside the pre-defined 'rotation bands'.

Scale operations are made available by holding down a CTRL key when clicking with the left mouse button. The dragger is then in scaling mode, and dragging while holding down the mouse button will uniformly scale the trackball sphere.

For the application programmer's convenience, the Coin library also provides a manipulator class called SoTrackballManip, which wraps the SoTrackballDragger into the necessary mechanisms for making direct insertion of this dragger into a scenegraph possible with very little effort.

See also:

SoTrackballManip

Constructor & Destructor Documentation

SoTrackballDragger::SoTrackballDragger (void)Default constructor, sets up the dragger nodekit catalog with the interaction and feedback geometry.

Node kit structure (new entries versus parent class marked with arrow prefix):

 
   CLASS SoTrackballDragger
   -->"this"
         "callbackList"
         "topSeparator"
            "motionMatrix"
   -->      "surroundScale"
   -->      "antiSquish"
            "geomSeparator"
   -->         "rotatorSwitch"
   -->            "rotator"
   -->            "rotatorActive"
   -->         "XRotatorSwitch"
   -->            "XRotator"
   -->            "XRotatorActive"
   -->         "YRotatorSwitch"
   -->            "YRotator"
   -->            "YRotatorActive"
   -->         "ZRotatorSwitch"
   -->            "ZRotator"
   -->            "ZRotatorActive"
   -->         "userAxisRotation"
   -->         "userAxisSwitch"
   -->            "userAxis"
   -->            "userAxisActive"
   -->         "userRotatorSwitch"
   -->            "userRotator"
   -->            "userRotatorActive"
   .fi
 
 
 (See SoBaseKit::printDiagram() for information about the output formatting.)
 
 Detailed information on catalog parts:
 
 
 
   CLASS SoTrackballDragger
   PVT   "this",  SoTrackballDragger  --- 
         "callbackList",  SoNodeKitListPart [ SoCallback, SoEventCallback ] 
   PVT   "topSeparator",  SoSeparator  --- 
   PVT   "motionMatrix",  SoMatrixTransform  --- 
         "surroundScale",  SoSurroundScale  --- 
         "antiSquish",  SoAntiSquish  --- 
   PVT   "geomSeparator",  SoSeparator  --- 
   PVT   "rotatorSwitch",  SoSwitch  --- 
         "rotator",  SoSeparator  --- 
         "rotatorActive",  SoSeparator  --- 
   PVT   "XRotatorSwitch",  SoSwitch  --- 
         "XRotator",  SoSeparator  --- 
         "XRotatorActive",  SoSeparator  --- 
   PVT   "YRotatorSwitch",  SoSwitch  --- 
         "YRotator",  SoSeparator  --- 
         "YRotatorActive",  SoSeparator  --- 
   PVT   "ZRotatorSwitch",  SoSwitch  --- 
         "ZRotator",  SoSeparator  --- 
         "ZRotatorActive",  SoSeparator  --- 
   PVT   "userAxisRotation",  SoRotation  --- 
   PVT   "userAxisSwitch",  SoSwitch  --- 
         "userAxis",  SoSeparator  --- 
         "userAxisActive",  SoSeparator  --- 
   PVT   "userRotatorSwitch",  SoSwitch  --- 
         "userRotator",  SoSeparator  --- 
         "userRotatorActive",  SoSeparator  --- 
   .fi
 
 
 (See SoBaseKit::printTable() for information about the output formatting.) 
 
 References SoDragger::addFinishCallback(), SoDragger::addMotionCallback(), SoDragger::addOtherEventCallback(), SoDragger::addStartCallback(), SoDragger::addValueChangedCallback(), fieldSensorCB(), finishCB(), metaKeyChangeCB(), motionCB(), SoInteractionKit::readDefaultParts(), rotation, rotFieldSensor, scaleFactor, scaleFieldSensor, setAllPartsActive(), SoInteractionKit::setPartAsDefault(), SoDelayQueueSensor::setPriority(), setUpConnections(), SoAntiSquish::sizing, startCB(), and valueChangedCB().
 

 

SoTrackballDragger::~SoTrackballDragger () [protected]Protected destructor.

(Dragger classes are derived from SoBase, so they are reference counted and automatically destroyed when their reference count goes to 0.)

References rotFieldSensor, and scaleFieldSensor.

Member Function Documentation

void SoTrackballDragger::initClass (void) [static]Initializes type system for this dragger class.

Application programmers should usually not have to invoke this method, see documentation of SoInteraction::init().

Reimplemented from SoDragger.

SbBool SoTrackballDragger::isAnimationEnabled (void)Whether or not the trackball will start a spin animation after a quick drag-and-release.

Note: this feature is not supported yet in the Coin library, so even though if TRUE is returned, spin animations will not be possible to trigger.

void SoTrackballDragger::setAnimationEnabled (SbBool newval)Set a flag which will decide whether or not the trackball will start a spin animation after a quick drag-and-release.

Note: this feature is not supported yet in the Coin library.

SbBool SoTrackballDragger::setUpConnections (SbBool onoff, SbBool doitalways = 0) [protected, virtual]Sets up all internal connections for instances of this class.

(This method will usually not be of interest to the application programmer, unless you want to extend the library with new custom nodekits or dragger classes. If so, see the SoBaseKit class documentation.)

Reimplemented from SoInteractionKit.

References SoFieldSensor::attach(), SoBaseKit::connectionsSetUp, SoFieldSensor::detach(), fieldSensorCB(), SoFieldSensor::getAttachedField(), rotation, rotFieldSensor, scaleFactor, scaleFieldSensor, and SoInteractionKit::setUpConnections().

Referenced by SoTrackballDragger().

void SoTrackballDragger::setDefaultOnNonWritingFields (void) [protected, virtual](Be aware that this method is unlikely to be of interest to the application programmer who does not want to extend the library with new custom nodekits or draggers. If you indeed are writing extensions, see the information in the SoBaseKit class documentation.)

This is a virtual method, and the code in it should call SoField::setDefault() with argument TRUE on part fields that should not be written upon scenegraph export operations.

This is typically done when:

1.

field value is NULL and part is NULL by default

2.

it is a leaf SoGroup or SoSeparator node with no children

3.

it is a leaf listpart with no children and an SoGroup or SoSeparator container

4.

it is a non-leaf part and it's of SoGroup type and all fields are at their default values

Subclasses should usually override this to do additional settings for new member fields. From the subclass, do remember to call 'upwards' to your superclass' setDefaultOnNonWritingFields() method.

Reimplemented from SoDragger.

References SoBaseKit::getAnyPart(), SbRotation::identity(), SoRotation::rotation, SoDragger::setDefaultOnNonWritingFields(), and SoSwitch::whichChild.

void SoTrackballDragger::dragStart (void) [protected]This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

Called when dragger is selected (picked) by the user.

References SoDragger::BACK, SoPath::findNode(), SoDragger::FRONT, SoDragger::getEvent(), SoDragger::getFrontOnProjector(), SoDragger::getMotionMatrix(), SoDragger::getNormalizedLocaterPosition(), SoDragger::getPickPath(), SoDragger::getSurrogatePartPickedName(), SoDragger::getViewVolume(), SoDragger::getWorldStartingPoint(), SbVec3f::length(), SbRotation::multVec(), SbMatrix::multVecMatrix(), SbVec3f::normalize(), SoDebugError::postWarning(), setAllPartsActive(), SoDragger::setStartingPoint(), SoInteractionKit::setSwitchValue(), SbVec3f::setValue(), and SoDragger::USE_PICK.

Referenced by startCB().

void SoTrackballDragger::drag (void) [protected]This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

Called when user drags the mouse after picking the dragger.

References SoDragger::appendRotation(), SoDragger::appendScale(), SbVec3f::dot(), SoDragger::getNormalizedLocaterPosition(), SoDragger::getStartMotionMatrix(), SoDragger::getViewVolume(), SoDragger::getWorldStartingPoint(), SbVec3f::length(), SbMatrix::multVecMatrix(), SbVec3f::normalize(), SoDebugError::postWarning(), and SoDragger::setMotionMatrix().

Referenced by motionCB().

void SoTrackballDragger::dragFinish (void) [protected]This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

Called when mouse button is released after picking and interacting with the dragger.

References SoDragger::getNormalizedLocaterPosition(), SbRotation::getValue(), SoDragger::saveStartParameters(), and setAllPartsActive().

Referenced by finishCB().

void SoTrackballDragger::setAllPartsActive (SbBool onoroff) [protected]If the input argument is TRUE, all the geometry parts of the dragger will become highligthed, as when active.

Used internally during scaling operations and free-form rotations.

References SoInteractionKit::setSwitchValue().

Referenced by dragFinish(), dragStart(), and SoTrackballDragger().

void SoTrackballDragger::startCB (void * f, SoDragger * d) [static, protected]This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

References dragStart().

Referenced by SoTrackballDragger().

void SoTrackballDragger::motionCB (void * f, SoDragger * d) [static, protected]This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

References drag().

Referenced by SoTrackballDragger().

void SoTrackballDragger::finishCB (void * f, SoDragger * d) [static, protected]This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

References dragFinish().

Referenced by SoTrackballDragger().

void SoTrackballDragger::metaKeyChangeCB (void * f, SoDragger * d) [static, protected]This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

Referenced by SoTrackballDragger().

void SoTrackballDragger::fieldSensorCB (void * d, SoSensor * s) [static, protected]This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

Reimplemented from SoInteractionKit.

References SoDragger::getMotionMatrix(), SoDragger::setMotionMatrix(), and SoDragger::workFieldsIntoTransform().

Referenced by setUpConnections(), and SoTrackballDragger().

void SoTrackballDragger::valueChangedCB (void * f, SoDragger * d) [static, protected]This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

References SoFieldSensor::attach(), SoFieldSensor::detach(), SoDragger::getMotionMatrix(), SbMatrix::getTransform(), rotation, rotFieldSensor, scaleFactor, and scaleFieldSensor.

Referenced by SoTrackballDragger().

Member Data Documentation

SoSFRotation SoTrackballDragger::rotationThis field is continuously updated to contain the rotation of the dragger's trackball.

Referenced by setUpConnections(), SoTrackballDragger(), and valueChangedCB().

SoSFVec3f SoTrackballDragger::scaleFactorContinuously updated to contain the current vector of scaling along the X, Y and Z axes. The three components will always be equal, as this dragger only supports uniform scale operations.

Referenced by setUpConnections(), SoTrackballDragger(), and valueChangedCB().

SoFieldSensor * SoTrackballDragger::rotFieldSensor [protected]This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

Referenced by setUpConnections(), SoTrackballDragger(), valueChangedCB(), and ~SoTrackballDragger().

SoFieldSensor * SoTrackballDragger::scaleFieldSensor [protected]This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

Referenced by setUpConnections(), SoTrackballDragger(), valueChangedCB(), and ~SoTrackballDragger().

Author

Generated automatically by Doxygen for Coin from the source code.