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# Ogre::RegionSceneQuery Class Reference

Abstract class defining a query which returns single results from a region. More...

`#include <OgreSceneQuery.h>`

Inheritance diagram for Ogre::RegionSceneQuery:

[legend]
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
| RegionSceneQuery (SceneManager *mgr)
| Standard constructor, should be called by SceneManager.
virtual | ~RegionSceneQuery ()
virtual SceneQueryResult & | execute (void)
| Executes the query, returning the results back in one list.
virtual void | execute (SceneQueryListener *listener)=0
| Executes the query and returns each match through a listener interface.
virtual SceneQueryResult & | 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)
| Self-callback in order to deal with execute which returns collection.
bool | queryResult (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
SceneQueryResult * | mLastResult
SceneManager * | mParentSceneMgr
uint32 | mQueryMask
uint32 | mQueryTypeMask
std::set< WorldFragmentType > | mSupportedWorldFragments
WorldFragmentType | mWorldFragmentType

## Detailed Description

Abstract class defining a query which returns single results from a region.

Remarks:
  This class is simply a generalisation of the subtypes of query that return a set of individual results in a region. See the SceneQuery class for abstract information, and subclasses for the detail of each query type.

Definition at line 217 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 77 of file OgreSceneQuery.h.

## Constructor & Destructor Documentation

Ogre::RegionSceneQuery::RegionSceneQuery | ( | SceneManager * | mgr | ) |

| Standard constructor, should be called by SceneManager.

virtual Ogre::RegionSceneQuery::~RegionSceneQuery | ( |  | ) | `[virtual]`

## Member Function Documentation

virtual void Ogre::RegionSceneQuery::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::RegionSceneQuery::execute | ( | SceneQueryListener * | 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::DefaultSphereSceneQuery, Ogre::DefaultPlaneBoundedVolumeListSceneQuery, and Ogre::DefaultAxisAlignedBoxSceneQuery.

virtual SceneQueryResult& Ogre::RegionSceneQuery::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 SceneQueryResult& Ogre::RegionSceneQuery::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 169 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::RegionSceneQuery::queryResult | ( | SceneQuery::WorldFragment * | fragment | ) | `[virtual]`

| Self-callback in order to deal with execute which returns collection. Implements Ogre::SceneQueryListener.

bool Ogre::RegionSceneQuery::queryResult | ( | MovableObject * | first | ) | `[virtual]`

| Self-callback in order to deal with execute which returns collection. Implements Ogre::SceneQueryListener.

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

SceneQueryResult* Ogre::RegionSceneQuery::mLastResult`[protected]`

| Definition at line 221 of file OgreSceneQuery.h.

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

| Definition at line 117 of file OgreSceneQuery.h.

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

| Definition at line 118 of file OgreSceneQuery.h.

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

| Definition at line 119 of file OgreSceneQuery.h.

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

| Definition at line 120 of file OgreSceneQuery.h.

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

| Definition at line 121 of file OgreSceneQuery.h.

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

- OgreSceneQuery.h

Copyright © 2000-2005 by The OGRE Team
This work is licensed under a Creative Commons Attribution-ShareAlike 2.5 License.
Last modified Thu Mar 6 09:48:45 2008