Main Page | Namespace List | Class Hierarchy | Alphabetical List | Class List | File List | Namespace Members | Class Members | File Members | Related Pages

Ogre::IntersectionSceneQuery Class Reference

Separate SceneQuery class to query for pairs of objects which are possibly intersecting one another. More...

#include <OgreSceneQuery.h>

Inheritance diagram for Ogre::IntersectionSceneQuery:

Ogre::SceneQuery Ogre::IntersectionSceneQueryListener Ogre::DefaultIntersectionSceneQuery Ogre::BspIntersectionSceneQuery Ogre::OctreeIntersectionSceneQuery List of all members.

Public Types

enum  WorldFragmentType {
  WFT_NONE, WFT_PLANE_BOUNDED_REGION, WFT_SINGLE_INTERSECTION, WFT_CUSTOM_GEOMETRY,
  WFT_RENDER_OPERATION
}
 This type can be used by collaborating applications & SceneManagers to agree on the type of world geometry to be returned from queries. More...


Public Member Functions

 IntersectionSceneQuery (SceneManager *mgr)
virtual ~IntersectionSceneQuery ()
virtual IntersectionSceneQueryResult & execute (void)
 Executes the query, returning the results back in one list.

virtual void execute (IntersectionSceneQueryListener *listener)=0
 Executes the query and returns each match through a listener interface.

virtual IntersectionSceneQueryResult & getLastResults (void) const
 Gets the results of the last query that was run using this object, provided the query was executed using the collection-returning version of execute.

virtual void clearResults (void)
 Clears the results of the last query execution.

bool queryResult (MovableObject *first, MovableObject *second)
 Self-callback in order to deal with execute which returns collection.

bool queryResult (MovableObject *movable, SceneQuery::WorldFragment *fragment)
 Self-callback in order to deal with execute which returns collection.

virtual void setQueryMask (uint32 mask)
 Sets the mask for results of this query.

virtual uint32 getQueryMask (void) const
 Returns the current mask for this query.

virtual void setQueryTypeMask (uint32 mask)
 Sets the type mask for results of this query.

virtual uint32 getQueryTypeMask (void) const
 Returns the current mask for this query.

virtual void setWorldFragmentType (enum WorldFragmentType wft)
 Tells the query what kind of world geometry to return from queries; often the full renderable geometry is not what is needed.

virtual WorldFragmentType getWorldFragmentType (void) const
 Gets the current world fragment types to be returned from the query.

virtual const std::set< WorldFragmentType > * getSupportedWorldFragmentTypes (void) const
 Returns the types of world fragments this query supports.


Protected Attributes

IntersectionSceneQueryResult * mLastResult
SceneManager * mParentSceneMgr
uint32 mQueryMask
uint32 mQueryTypeMask
std::set< WorldFragmentType > mSupportedWorldFragments
WorldFragmentType mWorldFragmentType

Detailed Description

Separate SceneQuery class to query for pairs of objects which are possibly intersecting one another.

Remarks:
This SceneQuery subclass considers the whole world and returns pairs of objects which are close enough to each other that they may be intersecting. Because of this slightly different focus, the return types and listener interface are different for this class.

Definition at line 502 of file OgreSceneQuery.h.

Member Enumeration Documentation

enum Ogre::SceneQuery::WorldFragmentType [inherited]
 

This type can be used by collaborating applications & SceneManagers to agree on the type of world geometry to be returned from queries.

Not all these types will be supported by all SceneManagers; once the application has decided which SceneManager specialisation to use, it is expected that it will know which type of world geometry abstraction is available to it.

Enumeration values:
WFT_NONE  Return no world geometry hits at all.
WFT_PLANE_BOUNDED_REGION  Return pointers to convex plane-bounded regions.
WFT_SINGLE_INTERSECTION  Return a single intersection point (typically RaySceneQuery only).
WFT_CUSTOM_GEOMETRY  Custom geometry as defined by the SceneManager.
WFT_RENDER_OPERATION  General RenderOperation structure.

Definition at line 73 of file OgreSceneQuery.h.

Constructor & Destructor Documentation

Ogre::IntersectionSceneQuery::IntersectionSceneQuery (  SceneManager *  mgr  ) 
 

virtual Ogre::IntersectionSceneQuery::~IntersectionSceneQuery (   )  [virtual]
 

Member Function Documentation

virtual void Ogre::IntersectionSceneQuery::clearResults (  void   )  [virtual]
 

Clears the results of the last query execution.

Remarks:
You only need to call this if you specifically want to free up the memory used by this object to hold the last query results. This object clears the results itself when executing and when destroying itself.

virtual void Ogre::IntersectionSceneQuery::execute (  IntersectionSceneQueryListener *  listener  )  [pure virtual]
 

Executes the query and returns each match through a listener interface.

Remarks:
Note that this method does not store the results of the query internally so does not update the 'last result' value. This means that this version of execute is more lightweight and therefore more efficient than the version which returns the results as a collection.

Implemented in Ogre::DefaultIntersectionSceneQuery, Ogre::BspIntersectionSceneQuery, and Ogre::OctreeIntersectionSceneQuery.

virtual IntersectionSceneQueryResult& Ogre::IntersectionSceneQuery::execute (  void   )  [virtual]
 

Executes the query, returning the results back in one list.

Remarks:
This method executes the scene query as configured, gathers the results into one structure and returns a reference to that structure. These results will also persist in this query object until the next query is executed, or clearResults() is called. An more lightweight version of this method that returns results through a listener is also available.

virtual IntersectionSceneQueryResult& Ogre::IntersectionSceneQuery::getLastResults (  void   )  const [virtual]
 

Gets the results of the last query that was run using this object, provided the query was executed using the collection-returning version of execute.

virtual uint32 Ogre::SceneQuery::getQueryMask (  void   )  const [virtual, inherited]
 

Returns the current mask for this query.

virtual uint32 Ogre::SceneQuery::getQueryTypeMask (  void   )  const [virtual, inherited]
 

Returns the current mask for this query.

virtual const std::set<WorldFragmentType>* Ogre::SceneQuery::getSupportedWorldFragmentTypes (  void   )  const [virtual, inherited]
 

Returns the types of world fragments this query supports.

Definition at line 165 of file OgreSceneQuery.h.

virtual WorldFragmentType Ogre::SceneQuery::getWorldFragmentType (  void   )  const [virtual, inherited]
 

Gets the current world fragment types to be returned from the query.

bool Ogre::IntersectionSceneQuery::queryResult (  MovableObject *  movable,
SceneQuery::WorldFragment *  fragment
)  [virtual]
 

Self-callback in order to deal with execute which returns collection.

Implements Ogre::IntersectionSceneQueryListener.

bool Ogre::IntersectionSceneQuery::queryResult (  MovableObject *  first,
MovableObject *  second
)  [virtual]
 

Self-callback in order to deal with execute which returns collection.

Implements Ogre::IntersectionSceneQueryListener.

virtual void Ogre::SceneQuery::setQueryMask (  uint32  mask  )  [virtual, inherited]
 

Sets the mask for results of this query.

Remarks:
This method allows you to set a 'mask' to limit the results of this query to certain types of result. The actual meaning of this value is up to the application; basically MovableObject instances will only be returned from this query if a bitwise AND operation between this mask value and the MovableObject::getQueryFlags value is non-zero. The application will have to decide what each of the bits means.

virtual void Ogre::SceneQuery::setQueryTypeMask (  uint32  mask  )  [virtual, inherited]
 

Sets the type mask for results of this query.

Remarks:
This method allows you to set a 'type mask' to limit the results of this query to certain types of objects. Whilst setQueryMask deals with flags set per instance of object, this method deals with setting a mask on flags set per type of object. Both may exclude an object from query results.

virtual void Ogre::SceneQuery::setWorldFragmentType (  enum WorldFragmentType  wft  )  [virtual, inherited]
 

Tells the query what kind of world geometry to return from queries; often the full renderable geometry is not what is needed.

Remarks:
The application receiving the world geometry is expected to know what to do with it; inevitably this means that the application must have knowledge of at least some of the structures used by the custom SceneManager.
The default setting is WFT_NONE.

Member Data Documentation

IntersectionSceneQueryResult* Ogre::IntersectionSceneQuery::mLastResult [protected]
 

Definition at line 506 of file OgreSceneQuery.h.

SceneManager* Ogre::SceneQuery::mParentSceneMgr [protected, inherited]
 

Definition at line 113 of file OgreSceneQuery.h.

uint32 Ogre::SceneQuery::mQueryMask [protected, inherited]
 

Definition at line 114 of file OgreSceneQuery.h.

uint32 Ogre::SceneQuery::mQueryTypeMask [protected, inherited]
 

Definition at line 115 of file OgreSceneQuery.h.

std::set<WorldFragmentType> Ogre::SceneQuery::mSupportedWorldFragments [protected, inherited]
 

Definition at line 116 of file OgreSceneQuery.h.

WorldFragmentType Ogre::SceneQuery::mWorldFragmentType [protected, inherited]
 

Definition at line 117 of file OgreSceneQuery.h.

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

Copyright © 2000-2005 by The OGRE Team
Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 2.5 License.
Last modified Sun Mar 12 14:44:02 2006