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CollisionTraverser Class Reference

This class manages the traversal through the scene graph to detect collisions. More...

#include <collisionTraverser.h>

List of all members.

Public Member Functions

 CollisionTraverser ()
 ~CollisionTraverser ()
void add_collider (CollisionNode *node, CollisionHandler *handler)
 Adds a new CollisionNode, representing an object that will be tested for collisions into other objects, along with the handler that will serve each detected collision.

bool remove_collider (CollisionNode *node)
 Removes the collider (and its associated handler) from the set of CollisionNodes that will be tested each frame for collisions into other objects.

bool has_collider (CollisionNode *node) const
 Returns true if the indicated node is current in the set of nodes that will be tested each frame for collisions into other objects.

int get_num_colliders () const
 Returns the number of CollisionNodes that have been added to the traverser via add_collider().

CollisionNode * get_collider (int n) const
 Returns the nth CollisionNode that has been added to the traverser via add_collider().

CollisionHandler * get_handler (CollisionNode *node) const
 Returns the handler that is currently assigned to serve the indicated collision node, or NULL if the node is not on the traverser's set of active nodes.

void clear_colliders ()
 Completely empties the set of collision nodes and their associated handlers.

void traverse (const NodePath &root)
void output (ostream &out) const
void write (ostream &out, int indent_level) const

Private Types

typedef pmap< PointerTo< CollisionNode >,
PointerTo< CollisionHandler > > 		Colliders
typedef pvector< CollisionNode * > OrderedColliders
typedef pmap< PointerTo< CollisionHandler >,
int > 		Handlers

Private Member Functions

void prepare_colliders (CollisionLevelState &state)
void r_traverse (CollisionLevelState &level_state)
void compare_collider_to_node (CollisionEntry &entry, const GeometricBoundingVolume *from_parent_gbv, const GeometricBoundingVolume *from_node_gbv, const GeometricBoundingVolume *into_node_gbv)
void compare_collider_to_geom_node (CollisionEntry &entry, const GeometricBoundingVolume *from_parent_gbv, const GeometricBoundingVolume *from_node_gbv, const GeometricBoundingVolume *into_node_gbv)
void compare_collider_to_solid (CollisionEntry &entry, const GeometricBoundingVolume *from_node_gbv, const GeometricBoundingVolume *solid_gbv)
void compare_collider_to_geom (CollisionEntry &entry, Geom *geom, const GeometricBoundingVolume *from_node_gbv, const GeometricBoundingVolume *solid_gbv)

Private Attributes

PointerTo< CollisionHandler > _default_handler
TypeHandle _graph_type
Colliders _colliders
OrderedColliders _ordered_colliders
Handlers _handlers

Static Private Attributes

PStatCollector _collisions_pcollector

Detailed Description

This class manages the traversal through the scene graph to detect collisions.

It holds ownership of a number of collider objects, each of which is a CollisionNode and an associated CollisionHandler.

When traverse() is called, it begins at the indicated root and detects all collisions with any of its collider objects against nodes at or below the indicated root, calling the appropriate CollisionHandler for each detected collision.

Definition at line 66 of file collisionTraverser.h.

Member Typedef Documentation

typedef pmap<PointerTo< CollisionNode >, PointerTo< CollisionHandler > > CollisionTraverser::Colliders [private]
 

Definition at line 115 of file collisionTraverser.h.

typedef pmap<PointerTo< CollisionHandler >, int> CollisionTraverser::Handlers [private]
 

Definition at line 120 of file collisionTraverser.h.

typedef pvector<CollisionNode *> CollisionTraverser::OrderedColliders [private]
 

Definition at line 117 of file collisionTraverser.h.

Constructor & Destructor Documentation

CollisionTraverser::CollisionTraverser (   ) 
 

Definition at line 48 of file collisionTraverser.cxx.

CollisionTraverser::~CollisionTraverser (   ) 
 

Definition at line 62 of file collisionTraverser.cxx.

References _colliders, _handlers, _ordered_colliders, nassertv, NULL, and PT.

Member Function Documentation

void CollisionTraverser::add_collider (  CollisionNode *  node,
CollisionHandler *  handler
) 
 

Adds a new CollisionNode, representing an object that will be tested for collisions into other objects, along with the handler that will serve each detected collision.

Each CollisionNode may be served by only one handler at a time, but a given handler may serve many CollisionNodes.

The handler that serves a particular node may be changed from time to time by calling add_collider() again on the same node.

Definition at line 95 of file collisionTraverser.cxx.

References _handlers.

void CollisionTraverser::clear_colliders (   ) 
 

Completely empties the set of collision nodes and their associated handlers.

Definition at line 272 of file collisionTraverser.cxx.

References _ordered_colliders.

void CollisionTraverser::compare_collider_to_geom (  CollisionEntry &  entry,
Geom *  geom,
const GeometricBoundingVolume *  from_node_gbv,
const GeometricBoundingVolume *  solid_gbv
)  [private]
 

Definition at line 732 of file collisionTraverser.cxx.

void CollisionTraverser::compare_collider_to_geom_node (  CollisionEntry &  entry,
const GeometricBoundingVolume *  from_parent_gbv,
const GeometricBoundingVolume *  from_node_gbv,
const GeometricBoundingVolume *  into_node_gbv
)  [private]
 

Definition at line 664 of file collisionTraverser.cxx.

void CollisionTraverser::compare_collider_to_node (  CollisionEntry &  entry,
const GeometricBoundingVolume *  from_parent_gbv,
const GeometricBoundingVolume *  from_node_gbv,
const GeometricBoundingVolume *  into_node_gbv
)  [private]
 

Definition at line 621 of file collisionTraverser.cxx.

References _colliders, GeometricBoundingVolume::contains(), CollisionEntry::get_from_node(), nassertv, NULL, and CollisionEntry::test_intersection().

void CollisionTraverser::compare_collider_to_solid (  CollisionEntry &  entry,
const GeometricBoundingVolume *  from_node_gbv,
const GeometricBoundingVolume *  solid_gbv
)  [private]
 

Definition at line 708 of file collisionTraverser.cxx.

CollisionNode * CollisionTraverser::get_collider (  int  n  )  const
 

Returns the nth CollisionNode that has been added to the traverser via add_collider().

Definition at line 234 of file collisionTraverser.cxx.

References _collisions_pcollector, _handlers, prepare_colliders(), and root.

CollisionHandler * CollisionTraverser::get_handler (  CollisionNode *  node  )  const
 

Returns the handler that is currently assigned to serve the indicated collision node, or NULL if the node is not on the traverser's set of active nodes.

Definition at line 253 of file collisionTraverser.cxx.

References _handlers.

int CollisionTraverser::get_num_colliders (   )  const
 

Returns the number of CollisionNodes that have been added to the traverser via add_collider().

Definition at line 218 of file collisionTraverser.cxx.

References _colliders, and _ordered_colliders.

bool CollisionTraverser::has_collider (  CollisionNode *  node  )  const
 

Returns true if the indicated node is current in the set of nodes that will be tested each frame for collisions into other objects.

Definition at line 202 of file collisionTraverser.cxx.

References _colliders, and NULL.

void CollisionTraverser::output (  ostream &  out  )  const
 

Definition at line 411 of file collisionTraverser.cxx.

void CollisionTraverser::prepare_colliders (  CollisionLevelState &  state  )  [private]
 

Definition at line 453 of file collisionTraverser.cxx.

References CollisionEntry::_from_node, and CollisionEntry::set_from_velocity().

Referenced by get_collider().

void CollisionTraverser::r_traverse (  CollisionLevelState &  level_state  )  [private]
 

Definition at line 498 of file collisionTraverser.cxx.

References root.

bool CollisionTraverser::remove_collider (  CollisionNode *  node  ) 
 

Removes the collider (and its associated handler) from the set of CollisionNodes that will be tested each frame for collisions into other objects.

Returns true if the definition was found and removed, false if it wasn't present to begin with.

Definition at line 158 of file collisionTraverser.cxx.

References _colliders, and _ordered_colliders.

void CollisionTraverser::traverse (  const NodePath &  root  ) 
 

Definition at line 286 of file collisionTraverser.cxx.

References nassertv, and NULL.

void CollisionTraverser::write (  ostream &  out,
int  indent_level
)  const
 

Definition at line 424 of file collisionTraverser.cxx.

References NULL.

Member Data Documentation

Colliders CollisionTraverser::_colliders [private]
 

Definition at line 116 of file collisionTraverser.h.

Referenced by compare_collider_to_node(), get_num_colliders(), has_collider(), remove_collider(), and ~CollisionTraverser().

PStatCollector CollisionTraverser::_collisions_pcollector [static, private]
 

Referenced by get_collider().

PointerTo< CollisionHandler > CollisionTraverser::_default_handler [private]
 

Definition at line 112 of file collisionTraverser.h.

TypeHandle CollisionTraverser::_graph_type [private]
 

Definition at line 113 of file collisionTraverser.h.

Handlers CollisionTraverser::_handlers [private]
 

Definition at line 121 of file collisionTraverser.h.

Referenced by add_collider(), get_collider(), get_handler(), and ~CollisionTraverser().

OrderedColliders CollisionTraverser::_ordered_colliders [private]
 

Definition at line 118 of file collisionTraverser.h.

Referenced by clear_colliders(), get_num_colliders(), remove_collider(), and ~CollisionTraverser().

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