Open Inventor Release 2024.2.0
 
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SoIntersectionDetectionAction Class Reference

VSG extension 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 SbBool SoIntersectionFilterCB(void *userData, const SoPath *p1, const SoPath *p2)
 
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 ).
 
SoSceneManagergetSceneManager () 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.
 
SoNodegetNodeAppliedTo () const
 Returns the node the action is being applied to.
 
SoPathgetPathAppliedTo () const
 Returns the path the action is being applied to.
 
const SoPathListgetPathListAppliedTo () const
 Returns the path list the action is being applied to.
 
const SoPathListgetOriginalPathListAppliedTo () 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 SoPathgetCurPath ()
 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.
 
SoStategetState () 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

VSG extension 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.

SEE ALSO

SoCollisionManager, SoWinCollisionViewer

Definition at line 107 of file SoIntersectionDetectionAction.h.

Member Typedef Documentation

◆ SoIntersectionCB

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

Definition at line 128 of file SoIntersectionDetectionAction.h.

◆ SoIntersectionFilterCB

typedef SbBool SoIntersectionFilterCB(void *userData, const SoPath *p1, const SoPath *p2)

Definition at line 49 of file SoIntersectionDetectionAction.h.

Member Enumeration Documentation

◆ Axis

Axis.

Enumerator
X_AXIS 

X.

Y_AXIS 

Y.

Z_AXIS 

Z.

Definition at line 167 of file SoIntersectionDetectionAction.h.

◆ Position

Position.

Enumerator
BEGIN 

Begin.

END 

End.

Definition at line 177 of file SoIntersectionDetectionAction.h.

◆ Resp

Types definitions.

Enumerator
NEXT_PRIMITIVE 

Next primitive.

NEXT_SHAPE 

Next shape.

ABORT 

Abort.

Definition at line 115 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:

  1. All paths have the same head node.
  2. Paths are sorted in traversal order.
  3. If one path ends at node A, no other path continues through A.
  4. 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 224 of file SoIntersectionDetectionAction.h.


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