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¶

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