Class to detect intersections. More...

#include <Inventor/collision/SoIntersectionDetectionAction.h>

Inheritance diagram for SoIntersectionDetectionAction:

Public Types
enum	Resp { NEXT_PRIMITIVE , NEXT_SHAPE , ABORT }
	Types definitions. More...

enum	Axis { X_AXIS = 1 , Y_AXIS = 2 , Z_AXIS = 4 }
	Axis. More...

enum	Position { BEGIN , END }
	Position. More...

typedef Resp	SoIntersectionCB(void userData, const SoIntersectingPrimitive , const SoIntersectingPrimitive *)

Public Types inherited from SoAction
enum	DistribMode { LOCAL_ONLY , CLUSTER_ONLY , ALL }
	This is used to define the way an action is distributed across a cluster. More...

enum	AppliedCode { NODE , PATH , PATH_LIST }
	This enum is used to determine what the action is being applied to. More...

enum	PathCode { NO_PATH , IN_PATH , BELOW_PATH , OFF_PATH }
	This enum may be used during traversal of nodes to indicate where the node is with respect to the path being traversed. More...

Public Member Functions
virtual SoType	getTypeId () const
	Returns the type identifier for this specific instance.

	SoIntersectionDetectionAction ()
	Constructor.

	~SoIntersectionDetectionAction ()
	Destructor.

void	apply (SoNode *node)
	Initiates an action on the graph defined by a node.

void	apply (SoPath *path)
	Initiates an action on the graph defined by a path.

void	apply (const SoPathList &pathList, SbBool obeysRules=FALSE)
	Initiates an action on the graph defined by a list of paths.

void	setFilterCallback (SoIntersectionFilterCB newFilterCB, void data=NULL)
	Sets a filter which allow the user to continue or not the intersection finding for a pair of shapes.

void	addIntersectionCallback (SoIntersectionCB f, void userData=NULL)
	Adds a callback to be called when there is an intersection.

void	removeIntersectionCallback (SoIntersectionCB f, void userData=NULL)
	Removes a callback to be called when there is an intersection.

Public Member Functions inherited from SoAction
virtual	~SoAction ()
	Destructor.

virtual void	clearApplyResult ()
	When applied, an action may reference nodes or create objects (e.g.

virtual void	invalidateState ()
	Invalidates the current traversal state in the action, forcing it to be recreated when the action is next applied.

void	stopActionInBranch ()
	This function stops the action in the current Scene Graph branch.

SbBool	getContinueActionInBranchFlag () const
	This function indicates if the action must stop in the current branch.

void	resetContinueActionInBranchFlag ()
	This function resets the continue action flag.

void	useAlternateRep (const SbBool enable)
	Tell the action to use alternate representations during traversal when available.

SbBool	isUsingAlternateRep () const
	Returns TRUE if current action is using alternate representations.

void	setSceneManager (SoSceneManager *mgr)
	Set the scene manager associated with this action (if any ).

SoSceneManager *	getSceneManager () const
	Return the SoSceneManager associated with this action.

virtual void	forwardTraversal (SoNode *node)
	Traverse a node that is not part of the current scenegraph.

virtual void	forwardTraversal (SoPath *path)
	Traverse a path that is not part of the current scenegraph.

DistribMode	getDistribMode () const
	Returns the distribution mode of this action across a cluster (ScaleViz-Cluster only).

AppliedCode	getWhatAppliedTo () const
	Returns code indicating what action is being applied to.

SoNode *	getNodeAppliedTo () const
	Returns the node the action is being applied to.

SoPath *	getPathAppliedTo () const
	Returns the path the action is being applied to.

const SoPathList *	getPathListAppliedTo () const
	Returns the path list the action is being applied to.

const SoPathList *	getOriginalPathListAppliedTo () const
	Returns the original path list the action is being applied to.

SbBool	isLastPathListAppliedTo () const
	Returns TRUE if the current list is the last one from the original.

PathCode	getPathCode (int &numIndices, const int *&indices)
	Returns path code based on where current node (the node at the end of the current path) lies with respect to the path(s) the action is being applied to.

PathCode	getPathCodeMI (int &numIndices, const int &indices, const int &instanceIndices)
	Extender API: available to programmers who wish to extend the toolkit

void	traverse (SoNode *node)
	Does traversal of a graph rooted by a node.

SbBool	hasTerminated () const
	Returns TRUE if the traversal has reached a termination condition.

const SoPath *	getCurPath ()
	Returns the path accumulated during traversal, i.e., the chain of nodes from the root of the traversed graph to the current node being traversed.

SoState *	getState () const
	Gets the state from the action.

virtual void	setUpState ()
	Creates state if it is NULL or it is no longer valid because new elements have been enabled since it was created.

void	setPipeId (int id)
	Sets pipe identifier in the range [1..N] associated to this render action while running a ScaleViz Multipipe configuration.

int	getPipeId () const
	Gets pipe identifier in the range [1..N] associated to this render action while running a ScaleViz Multipipe configuration.

bool	isBeingApplied ()
	Returns TRUE if this action is currently being applied.

virtual bool	preDelayedTraversal ()
	Method called by SoMultiPassManager before delayed pass traversals.

virtual void	postDelayedTraversal ()
	Method called by SoMultiPassManager after delayed pass traversals.

Public Member Functions inherited from SoTypedObject
SbBool	isOfType (const SoType &type) const
	Returns TRUE if this object is of the type specified in type or is derived from that type.

template<typename TypedObjectClass >
SbBool	isOfType () const
	Returns TRUE if this object is of the type of class TypedObjectClass or is derived from that class.

Static Public Member Functions
static SoType	getClassTypeId ()
	Returns the type identifier for this class.

static void	setIntersectEpsilon (float epsilon)
	Sets epsilon (small value) to be used in the collision computation.

static float	getIntersectEpsilon ()
	Queries epsilon (small value) to be used in the collision computation.

Static Public Member Functions inherited from SoAction
static SoType	getClassTypeId ()
	Returns the type identifier for this class.

static void	nullAction (SoAction , SoNode )
	Null action method that can be stored in lookup table when desired.

Static Public Member Functions inherited from SoTypedObject
static SoType	getClassTypeId ()
	Returns the type identifier for this class.

Friends
class	SoCollisionManager

Detailed Description

Class to detect intersections.

This action allows the programmer to analyze a scene graph to know which pairs of objects within the scene intersect.

The action first detects intersections between pairs of bounding boxes. If such an intersection occurs, the programmer can abort the action or allow it to determine if the primitives of the objects actually collide.

The algorithm can call programmer-supplied callbacks when there is an intersection between two objects.

Member Typedef Documentation

◆ SoIntersectionCB

typedef Resp SoIntersectionDetectionAction::SoIntersectionCB(void *userData, const SoIntersectingPrimitive *, const SoIntersectingPrimitive *)

Definition at line 126 of file SoIntersectionDetectionAction.h.

Member Enumeration Documentation

◆ Axis

enum SoIntersectionDetectionAction::Axis

Axis.

Enumerator
X_AXIS	X.
Y_AXIS	Y.
Z_AXIS	Z.

Definition at line 165 of file SoIntersectionDetectionAction.h.

◆ Position

enum SoIntersectionDetectionAction::Position

Position.

Enumerator
BEGIN	Begin.
END	End.

Definition at line 175 of file SoIntersectionDetectionAction.h.

◆ Resp

enum SoIntersectionDetectionAction::Resp

Types definitions.

Enumerator
NEXT_PRIMITIVE	Next primitive.
NEXT_SHAPE	Next shape.
ABORT	Abort.

Definition at line 113 of file SoIntersectionDetectionAction.h.

Constructor & Destructor Documentation

◆ SoIntersectionDetectionAction()

SoIntersectionDetectionAction::SoIntersectionDetectionAction ( )

Constructor.

◆ ~SoIntersectionDetectionAction()

SoIntersectionDetectionAction::~SoIntersectionDetectionAction ( )

Destructor.

Member Function Documentation

◆ addIntersectionCallback()

void SoIntersectionDetectionAction::addIntersectionCallback	(	SoIntersectionCB *	f,
		void *	userData = `NULL`
	)

Adds a callback to be called when there is an intersection.

◆ apply() [1/3]

void SoIntersectionDetectionAction::apply	(	const SoPathList &	pathList,
		SbBool	obeysRules = `FALSE`
	)

virtual

Initiates an action on the graph defined by a list of paths.

TRUE can be passed for the obeysRules flag if the given path list has the following 4 properties:

All paths have the same head node.
Paths are sorted in traversal order.
If one path ends at node A, no other path continues through A.
No two paths are the same.

These rules will be obeyed by path lists returned by picking and by searches for non-group nodes.

Reimplemented from SoAction.

◆ apply() [2/3]

void SoIntersectionDetectionAction::apply ( SoNode * node )

virtual

Initiates an action on the graph defined by a node.

Warning: Most actions call ref() on the node before traversing the scene graph, then call unref() after traversal. If the node's reference count was zero (the default), the call to apply() will cause it to be destroyed.

Reimplemented from SoAction.

◆ apply() [3/3]

void SoIntersectionDetectionAction::apply ( SoPath * path )

virtual

Initiates an action on the graph defined by a path.

Warning: Most actions call ref() on the path before traversing the scene graph, then call unref() after traversal. If the path's reference count was zero (the default), the call to apply() will cause it to be destroyed.

Reimplemented from SoAction.

◆ getClassTypeId()

static SoType SoIntersectionDetectionAction::getClassTypeId ( )

static

Returns the type identifier for this class.

◆ getIntersectEpsilon()

static float SoIntersectionDetectionAction::getIntersectEpsilon ( )

static

Queries epsilon (small value) to be used in the collision computation.

◆ getTypeId()

virtual SoType SoIntersectionDetectionAction::getTypeId ( ) const

virtual

Returns the type identifier for this specific instance.

Implements SoTypedObject.

◆ removeIntersectionCallback()

void SoIntersectionDetectionAction::removeIntersectionCallback	(	SoIntersectionCB *	f,
		void *	userData = `NULL`
	)

Removes a callback to be called when there is an intersection.

◆ setFilterCallback()

void SoIntersectionDetectionAction::setFilterCallback	(	SoIntersectionFilterCB *	newFilterCB,
		void *	data = `NULL`
	)

Sets a filter which allow the user to continue or not the intersection finding for a pair of shapes.

If the callback returns TRUE, the action search for real intersections, else it goes to the next shape pair.

◆ setIntersectEpsilon()

static void SoIntersectionDetectionAction::setIntersectEpsilon ( float epsilon )

static

Sets epsilon (small value) to be used in the collision computation.

If the distance between two objects is less than epsilon, the objects are considered to have collided.

Friends And Related Symbol Documentation

◆ SoCollisionManager

friend class SoCollisionManager

friend

Definition at line 222 of file SoIntersectionDetectionAction.h.

The documentation for this class was generated from the following file:

Inventor/collision/SoIntersectionDetectionAction.h

Open Inventor Release 2024.1.0

Public Types

Public Member Functions

Static Public Member Functions

Friends

Detailed Description

SEE ALSO

Member Typedef Documentation

◆ SoIntersectionCB

Member Enumeration Documentation

◆ Axis

◆ Position

◆ Resp

Constructor & Destructor Documentation

◆ SoIntersectionDetectionAction()

◆ ~SoIntersectionDetectionAction()

Member Function Documentation

◆ addIntersectionCallback()

◆ apply() [1/3]

◆ apply() [2/3]

◆ apply() [3/3]

◆ getClassTypeId()

◆ getIntersectEpsilon()

◆ getTypeId()

◆ removeIntersectionCallback()

◆ setFilterCallback()

◆ setIntersectEpsilon()

Friends And Related Symbol Documentation

◆ SoCollisionManager