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SoCenterballDragger Class Reference
[Draggers]

The SoCenterballDragger class is a dragger you can rotate and translate. More...

#include <Inventor/draggers/SoCenterballDragger.h>

Inheritance diagram for SoCenterballDragger:

SoDragger SoInteractionKit SoBaseKit SoNode SoFieldContainer SoBase List of all members.

Public Member Functions

 SoCenterballDragger (void)
virtual void saveStartParameters (void)

Static Public Member Functions

void initClass (void)

Public Attributes

SoSFRotation rotation
SoSFVec3f center

Protected Member Functions

 ~SoCenterballDragger ()
void transferCenterDraggerMotion (SoDragger *childdragger)
void setSwitches (SoDragger *activechild)
virtual SbBool setUpConnections (SbBool onoff, SbBool doitalways=FALSE)
virtual void setDefaultOnNonWritingFields (void)
virtual void getBoundingBox (SoGetBoundingBoxAction *action)
virtual void getMatrix (SoGetMatrixAction *action)

Static Protected Member Functions

void fieldSensorCB (void *f, SoSensor *s)
void valueChangedCB (void *f, SoDragger *d)
void kidStartCB (void *f, SoDragger *d)
void kidFinishCB (void *f, SoDragger *d)

Protected Attributes

SoFieldSensorrotFieldSensor
SoFieldSensorcenterFieldSensor

Detailed Description

The SoCenterballDragger class is a dragger you can rotate and translate.

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

centerball.png

For rotation, click either the ball "bands" to constrain rotation to happen around the normal vector of the disc, or anywhere else on the (invisible) ball for free-form rotation.

Translation is done by clicking and dragging any of the four arrow markers. Hold SHIFT to constrain translation to a single axis instead of in the plane.

When translating, instead of modifying the translation part of the motion matrix, a center field is updated, and the geometry is moved using an internal transformation node.


Constructor & Destructor Documentation

SoCenterballDragger::SoCenterballDragger 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 SoCenterballDragger -->"this" "callbackList" "topSeparator" "motionMatrix" --> "translateToCenter" --> "surroundScale" --> "antiSquish" --> "lightModel" "geomSeparator" --> "XAxisSwitch" --> "XAxis" --> "YAxisSwitch" --> "YAxis" --> "ZAxisSwitch" --> "ZAxis" --> "rotator" --> "YRotator" --> "ZCenterChanger" --> "rotX90" --> "ZRotator" --> "YCenterChanger" --> "rotY90" --> "XCenterChanger" --> "rot2X90" --> "XRotator"

(See SoBaseKit::printDiagram() for information about the output formatting.)

Detailed information on catalog parts:

CLASS SoCenterballDragger PVT "this", SoCenterballDragger --- "callbackList", SoNodeKitListPart [ SoCallback, SoEventCallback ] PVT "topSeparator", SoSeparator --- PVT "motionMatrix", SoMatrixTransform --- "translateToCenter", SoMatrixTransform --- "surroundScale", SoSurroundScale --- "antiSquish", SoAntiSquish --- "lightModel", SoLightModel --- PVT "geomSeparator", SoSeparator --- "rotator", SoRotateSphericalDragger --- "YRotator", SoRotateCylindricalDragger --- "ZCenterChanger", SoTranslate2Dragger --- PVT "rotX90", SoRotation --- "ZRotator", SoRotateCylindricalDragger --- "YCenterChanger", SoTranslate2Dragger --- PVT "rotY90", SoRotation --- "XCenterChanger", SoTranslate2Dragger --- PVT "rot2X90", SoRotation --- PVT "XAxisSwitch", SoSwitch --- "XAxis", SoSeparator --- PVT "YAxisSwitch", SoSwitch --- "YAxis", SoSeparator --- PVT "ZAxisSwitch", SoSwitch --- "ZAxis", SoSeparator --- "XRotator", SoRotateCylindricalDragger ---

(See SoBaseKit::printTable() for information about the output formatting.)

SoCenterballDragger::~SoCenterballDragger  )  [protected]
 

Protected destructor.

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


Member Function Documentation

void SoCenterballDragger::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.

void SoCenterballDragger::saveStartParameters void   )  [virtual]
 

This is invoked to save start parameters, to enable draggers to calculate relative motion.

Default method in superclass SoDragger just saves the motion matrix, but subclasses should overload this method if other data needs to be saved.

Reimplemented from SoDragger.

void SoCenterballDragger::transferCenterDraggerMotion SoDragger childdragger  )  [protected]
 

Should be called after motion matrix has been updated by a child dragger.

void SoCenterballDragger::setSwitches SoDragger activechild  )  [protected]
 

Sets values for the internal SoSwitch parts. If activechild == NULL, all feedback is deactivated.

SbBool SoCenterballDragger::setUpConnections SbBool  onoff,
SbBool  doitalways = FALSE
[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.

void SoCenterballDragger::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.)

A virtual method that 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 a 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.

void SoCenterballDragger::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.

void SoCenterballDragger::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.

void SoCenterballDragger::kidStartCB void *  d,
SoDragger child
[static, protected]
 

This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

Needed to activate some feedback.

void SoCenterballDragger::kidFinishCB void *  d,
SoDragger child
[static, protected]
 

This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

Needed to deactive some feedback.

void SoCenterballDragger::getBoundingBox SoGetBoundingBoxAction action  )  [protected, virtual]
 

Action method for the SoGetBoundingBoxAction.

Calculates bounding box and center coordinates for node and modifies the values of the action to encompass the bounding box for this node and to shift the center point for the scene more towards the one for this node.

Nodes influencing how geometry nodes calculates their bounding box also overrides this method to change the relevant state variables.

Reimplemented from SoDragger.

void SoCenterballDragger::getMatrix SoGetMatrixAction action  )  [protected, virtual]
 

Action method for SoGetMatrixAction.

Updates action by accumulating with the transformation matrix of this node (if any).

Reimplemented from SoDragger.


Member Data Documentation

SoSFRotation SoCenterballDragger::rotation
 

This field is continuously updated to contain the rotation of the ball.

SoSFVec3f SoCenterballDragger::center
 

Continuously updated to contain the current translation from the dragger's internal local origo position.

SoFieldSensor * SoCenterballDragger::rotFieldSensor [protected]
 

This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

SoFieldSensor * SoCenterballDragger::centerFieldSensor [protected]
 

This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.


The documentation for this class was generated from the following files:
Generated on Tue Jul 27 23:53:03 2004 for Coin by doxygen 1.3.7