SoGetMatrixAction.3coin4 - Man Page

The SoGetMatrixAction class is an action for accumulating the transformation matrix of a subgraph.

Synopsis

#include <Inventor/actions/SoGetMatrixAction.h>

Inherits SoAction.

Public Member Functions

virtual SoType getTypeId (void) const
SoGetMatrixAction (const SbViewportRegion &region)
virtual ~SoGetMatrixAction (void)
void setViewportRegion (const SbViewportRegion &region)
const SbViewportRegion & getViewportRegion (void) const
SbMatrix & getMatrix (void)
SbMatrix & getInverse (void)
SbMatrix & getTextureMatrix (void)
SbMatrix & getTextureInverse (void)

Public Member Functions inherited from SoAction
virtual ~SoAction (void)
virtual SbBool isOfType (SoType type) const
virtual void apply (SoNode *root)
virtual void apply (SoPath *path)
virtual void apply (const SoPathList &pathlist, SbBool obeysrules=FALSE)
void apply (SoAction *beingApplied)
virtual void invalidateState (void)
AppliedCode getWhatAppliedTo (void) const
SoNode * getNodeAppliedTo (void) const
SoPath * getPathAppliedTo (void) const
const SoPathList * getPathListAppliedTo (void) const
const SoPathList * getOriginalPathListAppliedTo (void) const
SbBool isLastPathListAppliedTo (void) const
PathCode getPathCode (int &numindices, const int *&indices)
void traverse (SoNode *const node)
SbBool hasTerminated (void) const
const SoPath * getCurPath (void)
SoState * getState (void) const
PathCode getCurPathCode (void) const
virtual SoNode * getCurPathTail (void)
void usePathCode (int &numindices, const int *&indices)
void pushCurPath (const int childindex, SoNode *node=NULL)
void popCurPath (const PathCode prevpathcode)
void pushCurPath (void)
void popPushCurPath (const int childindex, SoNode *node=NULL)
void popCurPath (void)
void switchToPathTraversal (SoPath *path)
void switchToNodeTraversal (SoNode *node)

Static Public Member Functions

static SoType getClassTypeId (void)
static void addMethod (const SoType type, SoActionMethod method)
static void enableElement (const SoType type, const int stackindex)
static void initClass (void)

Static Public Member Functions inherited from SoAction
static void initClass (void)
static void initClasses (void)
static SoType getClassTypeId (void)
static void nullAction (SoAction *action, SoNode *node)

Protected Member Functions

virtual const SoEnabledElementsList & getEnabledElements (void) const
virtual void beginTraversal (SoNode *node)

Protected Member Functions inherited from SoAction
SoAction (void)
virtual void endTraversal (SoNode *node)
void setTerminated (const SbBool flag)
virtual SbBool shouldCompactPathList (void) const

Static Protected Member Functions

static SoEnabledElementsList * getClassEnabledElements (void)
static SoActionMethodList * getClassActionMethods (void)

Static Protected Member Functions inherited from SoAction
static SoEnabledElementsList * getClassEnabledElements (void)
static SoActionMethodList * getClassActionMethods (void)

Additional Inherited Members

Public Types inherited from SoAction

enum AppliedCode { NODE = 0, PATH = 1, PATH_LIST = 2 }
enum PathCode { NO_PATH = 0, IN_PATH = 1, BELOW_PATH = 2, OFF_PATH = 3 }

Protected Attributes inherited from SoAction
SoState * state
SoActionMethodList * traversalMethods

Detailed Description

The SoGetMatrixAction class is an action for accumulating the transformation matrix of a subgraph.

This action makes it easy to calculate and convert to and from the global coordinate system of your scene and local coordinates of parts in a hierarchical model.

As opposed to most other action types, the SoGetMatrixAction does not traverse children of the node it is applied to -- just the node itself. When applied to paths, it stops at the last node and does not continue further with the children of the tail node.

Typical usage when querying for world space position, orientation and/or scaling would be as follows:

// First get hold of an SoPath through the scene graph down to the
// node ("mynode") you want to query about its current world space
// transformation(s).

SoSearchAction * searchaction = new SoSearchAction;
searchaction->setNode(mynode);
searchaction->apply(myscenegraphroot);

SoPath * path = searchaction->getPath();
assert(path != NULL);

// Then apply the SoGetMatrixAction to get the full transformation
// matrix from world space.

const SbViewportRegion vpr = myviewer->getViewportRegion();
SoGetMatrixAction * getmatrixaction = new SoGetMatrixAction(vpr);
getmatrixaction->apply(path);

SbMatrix transformation = getmatrixaction->getMatrix();

// And if you want to access the individual transformation
// components of the matrix:

SbVec3f translation;
SbRotation rotation;
SbVec3f scalevector;
SbRotation scaleorientation;

transformation.getTransform(translation, rotation, scalevector, scaleorientation);

Constructor & Destructor Documentation

SoGetMatrixAction::SoGetMatrixAction (const SbViewportRegion & region)

Constructor.

The region viewport specification is not used by this action, and is passed along in case it is needed by any nodes.

SoGetMatrixAction::~SoGetMatrixAction (void) [virtual]

Destructor.

Member Function Documentation

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

Returns the type identification of an object derived from a class inheriting SoAction. This is used for runtime type checking and 'downward' casting.

Implements SoAction.

SoType SoGetMatrixAction::getClassTypeId (void) [static]

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

void SoGetMatrixAction::addMethod (const SoType type, SoActionMethod method) [static]

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

void SoGetMatrixAction::enableElement (const SoType type, const int stackindex) [static]

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

const SoEnabledElementsList & SoGetMatrixAction::getEnabledElements (void) const [protected], [virtual]

Returns list of enabled elements.

Reimplemented from SoAction.

SoEnabledElementsList * SoGetMatrixAction::getClassEnabledElements (void) [static], [protected]

Returns list of enabled elements for this class. The enabledElements and methods variables are protected in the original OIV API. This is not such a good idea, since exposed static class member variables is a major grievance with regard to Win32 DLLs. This function is an extension for Coin, and it is not available in the original SGI Open Inventor v2.1 API.

SoActionMethodList * SoGetMatrixAction::getClassActionMethods (void) [static], [protected]

Returns list of action methods for this class. The enabledElements and methods variables are protected in the original OIV API. This is not such a good idea, since exposed static class member variables is a major grievance with regard to Win32 DLLs. This function is an extension for Coin, and it is not available in the original SGI Open Inventor v2.1 API.

void SoGetMatrixAction::setViewportRegion (const SbViewportRegion & region)

Set the viewport region.

See also

SoGetMatrixAction::SoGetMatrixAction()

const SbViewportRegion & SoGetMatrixAction::getViewportRegion (void) const

Returns the viewport region for the action instance.

SbMatrix & SoGetMatrixAction::getMatrix (void)

Returns the accumulated transformation matrix.

Note: don't modify the returned matrix. This should only be done if you are implementing your own transformation type node extensions. This advice is also valid for the other matrix access methods documented below.

SbMatrix & SoGetMatrixAction::getInverse (void)

Returns the inverse of the accumulated transformation matrix.

SbMatrix & SoGetMatrixAction::getTextureMatrix (void)

Returns the accumulated texture matrix.

SbMatrix & SoGetMatrixAction::getTextureInverse (void)

Returns the inverse of the accumulated texture matrix.

void SoGetMatrixAction::beginTraversal (SoNode * node) [protected], [virtual]

This virtual method is called from SoAction::apply(), and is the entry point for the actual scene graph traversal.

It can be overridden to initialize the action at traversal start, for specific initializations in the action subclasses inheriting SoAction.

Default method just calls traverse(), which any overridden implementation of the method must do too (or call SoAction::beginTraversal()) to trigger the scene graph traversal.

Reimplemented from SoAction.

Author

Generated automatically by Doxygen for Coin from the source code.

Info

Mon Jan 22 2024 00:00:00 Version 4.0.2 Coin