SoTrackballManip(3) The SoTrackballManip wraps an SoTrackballDragger for convenience.


#include <Inventor/manips/SoTrackballManip.h>

Inherits SoTransformManip.

Public Member Functions

virtual SoType getTypeId (void) const

SoTrackballManip (void)

Static Public Member Functions

static SoType getClassTypeId (void)

static void initClass (void)

Protected Member Functions

virtual const SoFieldData * getFieldData (void) const

virtual ~SoTrackballManip (void)

Static Protected Member Functions

static const SoFieldData ** getFieldDataPtr (void)

Additional Inherited Members

Detailed Description

The SoTrackballManip wraps an SoTrackballDragger for convenience.



The manipulator class takes care of wrapping up the SoTrackballDragger in a simple and convenient API for the application programmer, making it automatically surround the geometry it influences and taking care of the book-keeping routines for it's interaction with the relevant fields of an SoTransformation node.

Here's a dead simple, stand-alone example on how to set up an SoTrackballManip in a scenegraph:

  #include <Inventor/Qt/SoQt.h>
  #include <Inventor/Qt/viewers/SoQtExaminerViewer.h>
  #include <Inventor/nodes/SoCone.h>
  #include <Inventor/nodes/SoSeparator.h>
  #include <Inventor/manips/SoTrackballManip.h>
  main(int argc, char* argv[])
    QWidget * mainwin = SoQt::init(argv[0]);
    SoSeparator * root = new SoSeparator;
    SoTrackballManip * manip = new SoTrackballManip;
    root->addChild(new SoCone);
    SoQtExaminerViewer * viewer = new SoQtExaminerViewer(mainwin);
    return 0;

Compile and hit 'ESC' to go into scenegraph interaction mode in the examinerviewer, then change the rotation of the cone by interacting with the dragger bands.


Constructor & Destructor Documentation

SoTrackballManip::SoTrackballManip (void)

Default constructor. Allocates an SoTrackballDragger and an SoSurroundScale node to surround the geometry within our part of the scenegraph.

SoTrackballManip::~SoTrackballManip (void) [protected], [virtual]


Member Function Documentation

SoType SoTrackballManip::getClassTypeId (void) [static]

This static method returns the SoType object associated with objects of this class.

Reimplemented from SoTransformManip.

SoType SoTrackballManip::getTypeId (void) const [virtual]

Returns the type identification of an object derived from a class inheriting SoBase. This is used for run-time type checking and 'downward' casting.

Usage example:

  void foo(SoNode * node)
    if (node->getTypeId() == SoFile::getClassTypeId()) {
      SoFile * filenode = (SoFile *)node;  // safe downward cast, knows the type

For application programmers wanting to extend the library with new nodes, engines, nodekits, draggers or others: this method needs to be overridden in all subclasses. This is typically done as part of setting up the full type system for extension classes, which is usually accomplished by using the pre-defined macros available through for instance Inventor/nodes/SoSubNode.h (SO_NODE_INIT_CLASS and SO_NODE_CONSTRUCTOR for node classes), Inventor/engines/SoSubEngine.h (for engine classes) and so on.

For more information on writing Coin extensions, see the class documentation of the toplevel superclasses for the various class groups.

Reimplemented from SoTransformManip.

const SoFieldData ** SoTrackballManip::getFieldDataPtr (void) [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 SoTransformManip.

const SoFieldData * SoTrackballManip::getFieldData (void) const [protected], [virtual]

Returns a pointer to the class-wide field data storage object for this instance. If no fields are present, returns NULL.

Reimplemented from SoTransformManip.

void SoTrackballManip::initClass (void) [static]

Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.

Reimplemented from SoTransformManip.


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