SoTrackballDragger(3IV)

NAME
SoTrackballDragger — striped ball you can rotate or scale uniformly by dragging with the mouse

INHERITS FROM
SoBase > SoFieldContainer > SoNode > SoBaseKit > SoInteractionKit > SoDragger > SoTrackballDragger

SYNOPSIS
#include <Inventor/draggers/SoTrackballDragger.h>

Fields from class SoTrackballDragger:

SoSFVec3f
scaleFactor
SoSFRotation
rotation

Fields from class SoDragger:

SoSFBool
isActive

Fields from class SoInteractionKit:

SoSFEnum
renderCaching
SoSFEnum
boundingBoxCaching
SoSFEnum
renderCulling
SoSFEnum
pickCulling

Parts from class SoBaseKit:

(SoNodeKitListPart)
callbackList

Methods from class SoTrackballDragger:

SoTrackballDragger()
SbBool
isAnimationEnabled()
void
setAnimationEnabled(SbBool newVal)
static const SoNodekitCatalog *
getClassNodekitCatalog() const
static SoType
getClassTypeId()

Methods from class SoDragger:

void
addStartCallback(SoDraggerCB *f, void *userData = NULL)
void
removeStartCallback(SoDraggerCB *f, void *userData = NULL)
void
addMotionCallback(SoDraggerCB *f, void *userData = NULL)
void
removeMotionCallback(SoDraggerCB *f, void *userData = NULL)
void
addFinishCallback(SoDraggerCB *f, void *userData = NULL)
void
removeFinishCallback(SoDraggerCB *f, void *userData = NULL)
void
addValueChangedCallback(SoDraggerCB *f, void *userData = NULL)
void
removeValueChangedCallback(SoDraggerCB *f, void *userData = NULL)
SbBool
enableValueChangedCallbacks()
void
setMinGesture(int pixels)
int
getMinGesture() const
static void
setMinScale(float newMinScale)
static float
getMinScale()

Methods from class SoInteractionKit:

virtual SbBool
setPartAsPath(const SbName &partName, SoPath *surrogatePath )

Methods from class SoBaseKit:

virtual const SoNodekitCatalog *
getNodekitCatalog() const
virtual SoNode *
getPart(const SbName &partName, SbBool makeIfNeeded)
SbString
getPartString(const SoBase *part)
virtual SoNodeKitPath *
createPathToPart(const SbName &partName, SbBool makeIfNeeded, const SoPath *pathToExtend = NULL)
virtual SbBool
setPart(const SbName &partName, SoNode *newPart)
SbBool
set(char *partName, char *parameters)
SbBool
set(char *nameValuePairs)
static SbBool
isSearchingChildren()
static void
setSearchingChildren(SbBool newVal)

Methods from class SoNode:

void
setOverride(SbBool state)
SbBool
isOverride() const
SoNode *
copy(SbBool copyConnections = FALSE) const
virtual SbBool
affectsState() const
static SoNode *
getByName(const SbName &name)
static int
getByName(const SbName &name, SoNodeList &list)

Methods from class SoFieldContainer:

void
setToDefaults()
SbBool
hasDefaultValues() const
SbBool
fieldsAreEqual(const SoFieldContainer *fc) const
void
copyFieldValues(const SoFieldContainer *fc, SbBool copyConnections = FALSE)
void
get(SbString &fieldDataString)
virtual int
getFields(SoFieldList &resultList) const
virtual SoField *
getField(const SbName &fieldName) const
SbBool
getFieldName(const SoField *field, SbName &fieldName) const
SbBool
isNotifyEnabled() const
SbBool
enableNotify(SbBool flag)

Methods from class SoBase:

void
ref()
void
unref() const
void
unrefNoDelete() const
void
touch()
virtual SoType
getTypeId() const
SbBool
isOfType(SoType type) const
virtual void
setName(const SbName &name)
virtual SbName
getName() const

Macros from class SoBaseKit:

SO_GET_PART(kit, partName, partClass)

SO_CHECK_PART(kit, partName, partClass)

DESCRIPTION
SoTrackballDragger is a ball wrapped in three circular stripes. The stripes are oriented like wheels that spin around the x, y, and z axes. Drag the stripes to rotate the trackball around those axes. You do not have to hit the lines; pick anywhere within the stripe's outline. To rotate the trackball freely in 3 dimensions, click the area between the stripes and then drag. An invisible but pickable sphere initiates this dragging. If the mouse is still moving when you release it, the trackball will continue to spin.

Press the <Control> key to scale the trackball uniformly instead of rotating.

Press the <Shift> key and the user axis appears; this is a draggable axis with an extra stripe around it. Moving the mouse along the surface of the sphere drags the 'pole' of the axis. Release the <Shift> key and the user axis remains; drag the new stripe for constrained rotation around the user axis. To make the user axis disappear, press <Shift> and drag the pole to where two of other stripes intersect. This aligns the user axis with a primary axis, at which point the user axis disappears.

As you drag the trackball, it updates its rotation field, or its scaleFactor field if the <Control> key is down. As with all draggers, if you change the fields the dragger moves in response.

Remember: This is not an SoTransform!. If you want to move other objects with this dragger, you can either:

[a] Use an SoTrackballManip, which is subclassed from SoTransform. The manipulator creates one of these draggers and uses it as the interface to edit the manipulator's fields. (see the SoTrackballManip reference page).

[b] Use field-to-field connections to connect the fields of this dragger to those of any SoTransformation node.

You can change the parts in any instance of this dragger using setPart(). The default part geometries are defined as resources for this SoTrackballDragger class. They are detailed in the Dragger Resources section of the online reference page for this class. You can make your program use different default resources for the parts by copying the file /usr/share/data/draggerDefaults/trackballDragger.iv into your own directory, editing the file, and then setting the environment variable SO_DRAGGER_DIR to be a path to that directory.

FIELDS
SoSFVec3f
scaleFactor
Scale of the dragger.

SoSFRotation
rotation
Orientation of the dragger.

METHODS

SoTrackballDragger()
Constructor.

SbBool
isAnimationEnabled()
void
setAnimationEnabled(SbBool newVal)
If the mouse is moving while you release it, the trackball will continue to spin afterwards. These two methods will query and set whether this feature is turned on or off. By default, the animation feature is turned on.

static const SoNodekitCatalog *
getClassNodekitCatalog() const
Returns an SoNodekitCatalog for this class

static SoType
getClassTypeId()
Returns type identifier for this class.

CATALOG PARTS
All parts
 |  |  | NULL by
Part Name | Part Type | Default Type | Default
callbackList | NodeKitListPart | -- | yes
surroundScale | SurroundScale | -- | yes
antiSquish | AntiSquish | -- | no
rotator | Separator | -- | yes
rotatorActive | Separator | -- | yes
XRotator | Separator | -- | yes
XRotatorActive | Separator | -- | yes
YRotator | Separator | -- | yes
YRotatorActive | Separator | -- | yes
ZRotator | Separator | -- | yes
ZRotatorActive | Separator | -- | yes
userAxis | Separator | -- | yes
userAxisActive | Separator | -- | yes
userRotator | Separator | -- | yes
userRotatorActive | Separator | -- | yes
Extra information for list parts from above table
Part Name | Container Type | Permissible Types
callbackList | Separator | Callback, EventCallback

DRAGGER RESOURCES
.in 0n+.5i
Resource:    trackballRotator
.in 0n+.5i
Part:    rotator
Appearance:    Invisible but pickable sphere
Description:    Initiates unconstrained 3D rotation. Slightly smaller radius than the stripes, so you must pick between the stripes to use it.

.in 0n+.5i
Resource:    trackballRotatorActive
.in 0n+.5i
Part:    rotatorActive
Appearance:    Invisible sphere
Description:    Displayed during unconstrained 3D rotation.

.in 0n+.5i
Resource:    trackballXRotator
.in 0n+.5i
Part:    XRotator
Appearance:    White outline of a stripe aligned with the X axis.
Description:    Pick this to initiate constrained rotation about the X axis.

.in 0n+.5i
Resource:    trackballXRotatorActive
.in 0n+.5i
Part:    XRotatorActive
Appearance:    Yellow version of the regular XRotator
Description:    Displayed during constrained rotation about the X axis.

.in 0n+.5i
Resource:    trackballYRotator
.in 0n+.5i
Part:    YRotator
Appearance:    White outline of a stripe aligned with the Y axis.
Description:    Pick this to initiate constrained rotation about the Y axis.

.in 0n+.5i
Resource:    trackballYRotatorActive
.in 0n+.5i
Part:    YRotatorActive
Appearance:    Yellow version of the regular YRotator
Description:    Displayed during constrained rotation about the Y axis.

.in 0n+.5i
Resource:    trackballZRotator
.in 0n+.5i
Part:    ZRotator
Appearance:    White outline of a stripe aligned with the Z axis.
Description:    Pick this to initiate constrained rotation about the Z axis.

.in 0n+.5i
Resource:    trackballZRotatorActive
.in 0n+.5i
Part:    ZRotatorActive
Appearance:    Yellow version of the regular ZRotator
Description:    Displayed during constrained rotation about the Z axis.

.in 0n+.5i
Resource:    trackballUserAxis
.in 0n+.5i
Part:    userAxis
Appearance:    Thin purple line
Description:    Displays the user axis. Dragging the userRotator rotates about this line.

.in 0n+.5i
Resource:    trackballUserAxisActive
.in 0n+.5i
Part:    userAxisActive
Appearance:    Thin purple line
Description:    Displays the user axis. Dragging the userRotator rotates about this line.

.in 0n+.5i
Resource:    trackballUserRotator
.in 0n+.5i
Part:    userRotator
Appearance:    Transparent green stripe circling the user axis.
Description:    Pick to initiate constrained rotation about the user axis.

.in 0n+.5i
Resource:    trackballUserRotatorActive
.in 0n+.5i
Part:    userRotatorActive
Appearance:    Brighter green version of the regular userRotator
Description:    Displayed during constrained rotation about the user axis.

FILE FORMAT/DEFAULTS
TrackballDragger {
renderCaching	AUTO
boundingBoxCaching	AUTO
renderCulling	AUTO
pickCulling	AUTO
isActive	FALSE
rotation	0 0 1  0
scaleFactor	1 1 1
callbackList	NULL
surroundScale	NULL
antiSquish	AntiSquish {
    sizing LONGEST_DIAGONAL }
rotator	<trackballRotator resource>
rotatorActive	<trackballRotatorActive resource>
XRotator	<trackballXRotator resource>
XRotatorActive	<trackballXRotatorActive resource>
YRotator	<trackballYRotator resource>
YRotatorActive	<trackballYRotatorActive resource>
ZRotator	<trackballZRotator resource>
ZRotatorActive	<trackballZRotatorActive resource>
userAxis	<trackballUserAxis resource>
userAxisActive	<trackballUserAxisActive resource>
userRotator	<trackballUserRotator resource>
userRotatorActive	<trackballUserRotatorActive resource>
}

NOTE
Unlike most multi-function draggers, SoTrackballDragger is not a compound dragger made up of other draggers that perform its smaller tasks. This is not because it was inappropriate, but because the trackball was written before implementation of the methods that take care of synchronizing multiple child draggers. The younger SoCenterballDragger is similar in form to the trackball, but the centerball is a compound dragger.

SEE ALSO
SoInteractionKit, SoDragger, SoCenterballDragger, SoDirectionalLightDragger, SoDragPointDragger, SoHandleBoxDragger, SoJackDragger, SoPointLightDragger, SoRotateCylindricalDragger, SoRotateDiscDragger, SoRotateSphericalDragger, SoScale1Dragger, SoScale2Dragger, SoScale2UniformDragger, SoScaleUniformDragger, SoSpotLightDragger, SoTabBoxDragger, SoTabPlaneDragger, SoTransformBoxDragger, SoTransformerDragger, SoTranslate1Dragger, SoTranslate2Dragger