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source: OGRE/trunk/ogre_changes/Ogre1.2/OgreMain/include/OgreSceneManager.h @ 921

Revision 921, 119.7 KB checked in by mattausch, 18 years ago (diff)
added updates for visibility

Line
1	/*-------------------------------------------------------------------------
2	This source file is a part of OGRE
3	(Object-oriented Graphics Rendering Engine)
4
5	For the latest info, see http://www.ogre3d.org/
6
7	Copyright (c) 2000-2005 The OGRE Team
8	Also see acknowledgements in Readme.html
9
10	This library is free software; you can redistribute it and/or modify it
11	under the terms of the GNU Lesser General Public License (LGPL) as
12	published by the Free Software Foundation; either version 2.1 of the
13	License, or (at your option) any later version.
14
15	This library is distributed in the hope that it will be useful, but
16	WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
17	or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
18	License for more details.
19
20	You should have received a copy of the GNU Lesser General Public License
21	along with this library; if not, write to the Free Software Foundation,
22	Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA or go to
23	http://www.gnu.org/copyleft/lesser.txt
24	-------------------------------------------------------------------------*/
25	#ifndef __SceneManager_H__
26	#define __SceneManager_H__
27
28	// Precompiler options
29	#include "OgrePrerequisites.h"
30
31	#include "OgreString.h"
32	#include "OgreSceneNode.h"
33	#include "OgrePlane.h"
34	#include "OgreQuaternion.h"
35	#include "OgreColourValue.h"
36	#include "OgreCommon.h"
37	#include "OgreSceneQuery.h"
38	#include "OgreAutoParamDataSource.h"
39	#include "OgreAnimationState.h"
40	#include "OgreRenderQueue.h"
41	#include "OgreRenderQueueSortingGrouping.h"
42	#include "OgreRectangle2D.h"
43	#include "OgrePixelFormat.h"
44	#include "OgreResourceGroupManager.h"
45	#include "OgreTexture.h"
46
47	namespace Ogre {
48
49	/** Structure for holding a position & orientation pair. */
50	struct ViewPoint
51	{
52	Vector3 position;
53	Quaternion orientation;
54	};
55
56	// Forward declarations
57	class DefaultIntersectionSceneQuery;
58	class DefaultRaySceneQuery;
59	class DefaultSphereSceneQuery;
60	class DefaultAxisAlignedBoxSceneQuery;
61
62	/** Interface definition for classes which can listen in on the process
63	of rendering shadows, in order to implement custom behaviour.
64	*/
65	class _OgreExport ShadowListener
66	{
67	public:
68	ShadowListener() {}
69	virtual ~ShadowListener() {}
70
71	/** Event raised after all shadow textures have been rendered into for
72	all queues / targets but before any other geometry has been rendered
73	(including main scene geometry and any additional shadow receiver
74	passes).
75	@remarks
76	This callback is useful for those that wish to perform some
77	additional processing on shadow textures before they are used to
78	render shadows. For example you could perform some filtering by
79	rendering the existing shadow textures into another alternative
80	shadow texture with a shader.]
81	@note
82	This event will only be fired when texture shadows are in use.
83	@param numberOfShadowTextures The number of shadow textures in use
84	*/
85	virtual void shadowTexturesUpdated(size_t numberOfShadowTextures) = 0;
86
87	/** This event occurs just before the view & projection matrices are
88	set for rendering into a shadow texture.
89	@remarks
90	You can use this event hook to perform some custom processing,
91	such as altering the camera being used for rendering the light's
92	view, including setting custom view & projection matrices if you
93	want to perform an advanced shadow technique.
94	@note
95	This event will only be fired when texture shadows are in use.
96	@param light Pointer to the light for which shadows are being rendered
97	@param camera Pointer to the camera being used to render
98	*/
99	virtual void shadowTextureCasterPreViewProj(Light* light,
100	Camera* camera) = 0;
101	/** This event occurs just before the view & projection matrices are
102	set for re-rendering a shadow receiver.
103	@remarks
104	You can use this event hook to perform some custom processing,
105	such as altering the projection frustum being used for rendering
106	the shadow onto the receiver to perform an advanced shadow
107	technique.
108	@note
109	This event will only be fired when texture shadows are in use.
110	@param light Pointer to the light for which shadows are being rendered
111	@param frustum Pointer to the projection frustum being used to project
112	the shadow texture
113	*/
114	virtual void shadowTextureReceiverPreViewProj(Light* light,
115	Frustum* frustum) = 0;
116
117	};
118
119	/** Manages the organisation and rendering of a 'scene' i.e. a collection
120	of objects and potentially world geometry.
121	@remarks
122	This class defines the interface and the basic behaviour of a
123	'Scene Manager'. A SceneManager organises the culling and rendering of
124	the scene, in conjunction with the RenderQueue. This class is designed
125	to be extended through subclassing in order to provide more specialised
126	scene organisation structures for particular needs. The default
127	SceneManager culls based on a hierarchy of node bounding boxes, other
128	implementations can use an octree (@see OctreeSceneManager), a BSP
129	tree (@see BspSceneManager), and many other options. New SceneManager
130	implementations can be added at runtime by plugins, see
131	SceneManagerEnumerator for the interfaces for adding new SceneManager
132	types.
133	@par
134	There is a distinction between 'objects' (which subclass MovableObject,
135	and are movable, discrete objects in the world), and 'world geometry',
136	which is large, generally static geometry. World geometry tends to
137	influence the SceneManager organisational structure (e.g. lots of indoor
138	static geometry might result in a spatial tree structure) and as such
139	world geometry is generally tied to a given SceneManager implementation,
140	whilst MovableObject instances can be used with any SceneManager.
141	Subclasses are free to define world geometry however they please.
142	@par
143	Multiple SceneManager instances can exist at one time, each one with
144	a distinct scene. Which SceneManager is used to render a scene is
145	dependent on the Camera, which will always call back the SceneManager
146	which created it to render the scene.
147	*/
148	class _OgreExport SceneManager
149	{
150	public:
151	/// Query type mask which will be used for world geometry @see SceneQuery
152	static uint32 WORLD_GEOMETRY_TYPE_MASK;
153	/// Query type mask which will be used for entities @see SceneQuery
154	static uint32 ENTITY_TYPE_MASK;
155	/// Query type mask which will be used for effects like billboardsets / particle systems @see SceneQuery
156	static uint32 FX_TYPE_MASK;
157	/// Query type mask which will be used for StaticGeometry @see SceneQuery
158	static uint32 STATICGEOMETRY_TYPE_MASK;
159	/// Query type mask which will be used for lights @see SceneQuery
160	static uint32 LIGHT_TYPE_MASK;
161	/// User type mask limit
162	static uint32 USER_TYPE_MASK_LIMIT;
163	/** Comparator for material map, for sorting materials into render order (e.g. transparent last).
164	*/
165	struct materialLess
166	{
167	_OgreExport bool operator()(const Material* x, const Material* y) const;
168	};
169	/// Comparator for sorting lights relative to a point
170	struct lightLess
171	{
172	_OgreExport bool operator()(const Light* a, const Light* b) const;
173	};
174
175	/// Describes the stage of rendering when performing complex illumination
176	enum IlluminationRenderStage
177	{
178	/// No special illumination stage
179	IRS_NONE,
180	/// Render to texture stage, used for texture based shadows
181	IRS_RENDER_TO_TEXTURE,
182	/// Render from shadow texture to receivers stage
183	IRS_RENDER_RECEIVER_PASS
184	};
185
186	/** Enumeration of the possible modes allowed for processing the special case
187	render queue list.
188	@see SceneManager::setSpecialCaseRenderQueueMode
189	*/
190	enum SpecialCaseRenderQueueMode
191	{
192	/// Render only the queues in the special case list
193	SCRQM_INCLUDE,
194	/// Render all except the queues in the special case list
195	SCRQM_EXCLUDE
196	};
197
198	struct SkyDomeGenParameters
199	{
200	Real skyDomeCurvature;
201	Real skyDomeTiling;
202	Real skyDomeDistance;
203	int skyDomeXSegments;
204	int skyDomeYSegments;
205	int skyDomeYSegments_keep;
206	};
207
208	struct SkyPlaneGenParameters
209	{
210	Real skyPlaneScale;
211	Real skyPlaneTiling;
212	Real skyPlaneBow;
213	int skyPlaneXSegments;
214	int skyPlaneYSegments;
215	};
216
217	struct SkyBoxGenParameters
218	{
219	Real skyBoxDistance;
220	};
221
222	#ifdef GTP_VISIBILITY_MODIFIED_OGRE
223	/** added by matt: Render content of current scene node.
224	@param node scene node to be rendered
225	@param cam current camera
226	@param leavePassesInQueue list of passes which are left in queue
227	*/
228	void _renderSceneNode(Camera cam, SceneNode node, const int leavePassesInQueue = 0);
229	/** deletes all processed queues
230	@param leavePassesInQueue pass list which is not deleted from queue
231	@remark used to clear render queues before rendering scene node
232	*/
233	void _deleteRenderedQueueGroups(int leavePassesInQueue = 0);
234	/** Wrapper for useRenderableViewProjMde with is an
235	Internal method used by _renderVisibleObjects to deal with renderables
236	which override the camera's own view / projection materices.
237	*/
238	void useRenderableViewProjModeWrapper(Renderable* pRend); // HACK
239	/** HACK: A public wrapper method for setting up the renderstate for a rendering pass.
240	@param
241	pass The Pass details to set.
242	@returns
243	A Pass object that was used instead of the one passed in, can
244	happen when rendering shadow passes
245	@remark made public by matt
246	*/
247	virtual const Pass* setPassWrapper(Pass* pass);
248
249	/** Renders an Ogre Entity.
250	*/
251	//void renderEntity(Entity *ent);
252
253	/** Renders an Ogre MovableObject.
254	@param mov the movable object to be rendered
255	@param leavePassesInQueue flag determining the passes which are left
256	in render queue after rendering
257	*/
258	void _renderMovableObject(MovableObject *mov, const int leavePassesInQueue);
259
260	/** Renders a single renderable using pass 0 of the renderable.
261	*/
262	void _renderSingleRenderable(Renderable *rend);
263
264	/** Tells the scene manager that the frame ends (i.e.,
265	one frame in the main loop.
266	*/
267	virtual void endFrame() {};
268
269	#endif // GTP_VISIBILITY_MODIFIED_OGRE
270
271	protected:
272	/// Instance name
273	String mName;
274
275	/// Queue of objects for rendering
276	RenderQueue* mRenderQueue;
277
278	/// Current ambient light, cached for RenderSystem
279	ColourValue mAmbientLight;
280
281	/// The rendering system to send the scene to
282	RenderSystem *mDestRenderSystem;
283
284	typedef std::map<String, Camera* > CameraList;
285
286	/** Central list of cameras - for easy memory management and lookup.
287	*/
288	CameraList mCameras;
289
290	typedef std::map<String, StaticGeometry* > StaticGeometryList;
291	StaticGeometryList mStaticGeometryList;
292
293	typedef std::map<String, SceneNode*> SceneNodeList;
294
295	/** Central list of SceneNodes - for easy memory management.
296	@note
297	Note that this list is used only for memory management; the structure of the scene
298	is held using the hierarchy of SceneNodes starting with the root node. However you
299	can look up nodes this way.
300	*/
301	SceneNodeList mSceneNodes;
302
303	/// Camera in progress
304	Camera* mCameraInProgress;
305	/// Current Viewport
306	Viewport* mCurrentViewport;
307
308	/// Root scene node
309	SceneNode* mSceneRoot;
310
311	/// Autotracking scene nodes
312	typedef std::set<SceneNode*> AutoTrackingSceneNodes;
313	AutoTrackingSceneNodes mAutoTrackingSceneNodes;
314
315	// Sky params
316	// Sky plane
317	Entity* mSkyPlaneEntity;
318	Entity* mSkyDomeEntity[5];
319	Entity* mSkyBoxEntity[6];
320
321	SceneNode* mSkyPlaneNode;
322	SceneNode* mSkyDomeNode;
323	SceneNode* mSkyBoxNode;
324
325	// Sky plane
326	bool mSkyPlaneEnabled;
327	bool mSkyPlaneDrawFirst;
328	Plane mSkyPlane;
329	SkyPlaneGenParameters mSkyPlaneGenParameters;
330	// Sky box
331	bool mSkyBoxEnabled;
332	bool mSkyBoxDrawFirst;
333	Quaternion mSkyBoxOrientation;
334	SkyBoxGenParameters mSkyBoxGenParameters;
335	// Sky dome
336	bool mSkyDomeEnabled;
337	bool mSkyDomeDrawFirst;
338	Quaternion mSkyDomeOrientation;
339	SkyDomeGenParameters mSkyDomeGenParameters;
340
341	// Fog
342	FogMode mFogMode;
343	ColourValue mFogColour;
344	Real mFogStart;
345	Real mFogEnd;
346	Real mFogDensity;
347
348	typedef std::set<uint8> SpecialCaseRenderQueueList;
349	SpecialCaseRenderQueueList mSpecialCaseQueueList;
350	SpecialCaseRenderQueueMode mSpecialCaseQueueMode;
351	uint8 mWorldGeometryRenderQueue;
352
353	unsigned long mLastFrameNumber;
354	Matrix4 mTempXform[256];
355	bool mResetIdentityView;
356	bool mResetIdentityProj;
357
358	typedef std::map<String, MovableObject*> MovableObjectMap;
359	typedef std::map<String, MovableObjectMap*> MovableObjectCollectionMap;
360	MovableObjectCollectionMap mMovableObjectCollectionMap;
361	MovableObjectMap* getMovableObjectMap(const String& typeName);
362
363	/** Internal method for initialising the render queue.
364	@remarks
365	Subclasses can use this to install their own RenderQueue implementation.
366	*/
367	virtual void initRenderQueue(void);
368	/// A pass designed to let us render shadow colour on white for texture shadows
369	Pass* mShadowCasterPlainBlackPass;
370	/// A pass designed to let us render shadow receivers for texture shadows
371	Pass* mShadowReceiverPass;
372	/** Internal method for turning a regular pass into a shadow caster pass.
373	@remarks
374	This is only used for texture shadows, basically we're trying to
375	ensure that objects are rendered solid black.
376	This method will usually return the standard solid black pass for
377	all fixed function passes, but will merge in a vertex program
378	and fudge the AutpoParamDataSource to set black lighting for
379	passes with vertex programs.
380	*/
381	const Pass* deriveShadowCasterPass(const Pass* pass);
382	/** Internal method for turning a regular pass into a shadow receiver pass.
383	@remarks
384	This is only used for texture shadows, basically we're trying to
385	ensure that objects are rendered with a projective texture.
386	This method will usually return a standard single-texture pass for
387	all fixed function passes, but will merge in a vertex program
388	for passes with vertex programs.
389	*/
390	const Pass* deriveShadowReceiverPass(const Pass* pass);
391
392	/** Internal method to validate whether a Pass should be allowed to render.
393	@remarks
394	Called just before a pass is about to be used for rendering a group to
395	allow the SceneManager to omit it if required. A return value of false
396	skips this pass.
397	*/
398	bool validatePassForRendering(const Pass* pass);
399
400	/** Internal method to validate whether a Renderable should be allowed to render.
401	@remarks
402	Called just before a pass is about to be used for rendering a Renderable to
403	allow the SceneManager to omit it if required. A return value of false
404	skips it.
405	*/
406	bool validateRenderableForRendering(const Pass* pass, const Renderable* rend);
407
408	enum BoxPlane
409	{
410	BP_FRONT = 0,
411	BP_BACK = 1,
412	BP_LEFT = 2,
413	BP_RIGHT = 3,
414	BP_UP = 4,
415	BP_DOWN = 5
416	};
417
418	/* Internal utility method for creating the planes of a skybox.
419	*/
420	MeshPtr createSkyboxPlane(
421	BoxPlane bp,
422	Real distance,
423	const Quaternion& orientation,
424	const String& groupName);
425
426	/* Internal utility method for creating the planes of a skydome.
427	*/
428	MeshPtr createSkydomePlane(
429	BoxPlane bp,
430	Real curvature, Real tiling, Real distance,
431	const Quaternion& orientation,
432	int xsegments, int ysegments, int ySegmentsToKeep,
433	const String& groupName);
434
435	// Flag indicating whether SceneNodes will be rendered as a set of 3 axes
436	bool mDisplayNodes;
437
438	/// Storage of animations, lookup by name
439	typedef std::map<String, Animation*> AnimationList;
440	AnimationList mAnimationsList;
441	AnimationStateSet mAnimationStates;
442
443	/** Internal method used by _renderSingleObject to deal with renderables
444	which override the camera's own view / projection materices. */
445	void useRenderableViewProjMode(const Renderable* pRend);
446
447	/** Internal method used by _renderSingleObject to deal with renderables
448	which override the camera's own view / projection matrices. */
449	void resetViewProjMode(void);
450
451	typedef std::vector<RenderQueueListener*> RenderQueueListenerList;
452	RenderQueueListenerList mRenderQueueListeners;
453
454	typedef std::vector<ShadowListener*> ShadowListenerList;
455	ShadowListenerList mShadowListeners;
456	/// Internal method for firing the queue start event, returns true if queue is to be skipped
457	bool fireRenderQueueStarted(uint8 id, const String& invocation);
458	/// Internal method for firing the queue end event, returns true if queue is to be repeated
459	bool fireRenderQueueEnded(uint8 id, const String& invocation);
460
461	/// Internal method for firing the texture shadows updated event
462	void fireShadowTexturesUpdated(size_t numberOfShadowTextures);
463	/// Internal method for firing the pre caster texture shadows event
464	void fireShadowTexturesPreCaster(Light* light, Camera* camera);
465	/// Internal method for firing the pre receiver texture shadows event
466	void fireShadowTexturesPreReceiver(Light* light, Frustum* f);
467	/** Internal method for setting the destination viewport for the next render. */
468	virtual void setViewport(Viewport *vp);
469
470	/** Flag that indicates if all of the scene node's bounding boxes should be shown as a wireframe. */
471	bool mShowBoundingBoxes;
472
473	/** Internal method for rendering all objects using the default queue sequence. */
474	virtual void renderVisibleObjectsDefaultSequence(void);
475	/** Internal method for rendering all objects using a custom queue sequence. */
476	virtual void renderVisibleObjectsCustomSequence(RenderQueueInvocationSequence* s);
477	/** Internal method for preparing the render queue for use with each render. */
478	virtual void prepareRenderQueue(void);
479
480
481	/** Internal utility method for rendering a single object.
482	@remarks
483	Assumes that the pass has already been set up.
484	@param rend The renderable to issue to the pipeline
485	@param pass The pass which is being used
486	@param doLightIteration If true, this method will issue the renderable to
487	the pipeline possibly multiple times, if the pass indicates it should be
488	done once per light
489	@param manualLightList Only applicable if doLightIteration is false, this
490	method allows you to pass in a previously determined set of lights
491	which will be used for a single render of this object.
492	*/
493	virtual void renderSingleObject(const Renderable* rend, const Pass* pass,
494	bool doLightIteration, const LightList* manualLightList = 0);
495
496	/// Utility class for calculating automatic parameters for gpu programs
497	AutoParamDataSource mAutoParamDataSource;
498
499	ShadowTechnique mShadowTechnique;
500	bool mDebugShadows;
501	ColourValue mShadowColour;
502	Pass* mShadowDebugPass;
503	Pass* mShadowStencilPass;
504	Pass* mShadowModulativePass;
505	bool mShadowMaterialInitDone;
506	LightList mLightsAffectingFrustum;
507	HardwareIndexBufferSharedPtr mShadowIndexBuffer;
508	size_t mShadowIndexBufferSize;
509	Rectangle2D* mFullScreenQuad;
510	Real mShadowDirLightExtrudeDist;
511	IlluminationRenderStage mIlluminationStage;
512	unsigned short mShadowTextureSize;
513	unsigned short mShadowTextureCount;
514	PixelFormat mShadowTextureFormat;
515	typedef std::vector<TexturePtr> ShadowTextureList;
516	ShadowTextureList mShadowTextures;
517	typedef std::vector<Camera*> ShadowTextureCameraList;
518	ShadowTextureCameraList mShadowTextureCameras;
519	Texture* mCurrentShadowTexture;
520	bool mShadowUseInfiniteFarPlane;
521
522	/** Internal method for locating a list of lights which could be affecting the frustum.
523	@remarks
524	Custom scene managers are encouraged to override this method to make use of their
525	scene partitioning scheme to more efficiently locate lights, and to eliminate lights
526	which may be occluded by word geometry.
527	*/
528	virtual void findLightsAffectingFrustum(const Camera* camera);
529	/// Internal method for setting up materials for shadows
530	virtual void initShadowVolumeMaterials(void);
531	/// Internal method for creating shadow textures (texture-based shadows)
532	virtual void createShadowTextures(unsigned short size, unsigned short count,
533	PixelFormat fmt);
534	/// Internal method for destroying shadow textures (texture-based shadows)
535	virtual void destroyShadowTextures(void);
536	/// Internal method for preparing shadow textures ready for use in a regular render
537	virtual void prepareShadowTextures(Camera* cam, Viewport* vp);
538
539	/** Internal method for rendering all the objects for a given light into the
540	stencil buffer.
541	@param light The light source
542	@param cam The camera being viewed from
543	*/
544	virtual void renderShadowVolumesToStencil(const Light* light, const Camera* cam);
545	/** Internal utility method for setting stencil state for rendering shadow volumes.
546	@param secondpass Is this the second pass?
547	@param zfail Should we be using the zfail method?
548	@param twosided Should we use a 2-sided stencil?
549	*/
550	virtual void setShadowVolumeStencilState(bool secondpass, bool zfail, bool twosided);
551	/** Render a set of shadow renderables. */
552	void renderShadowVolumeObjects(ShadowCaster::ShadowRenderableListIterator iShadowRenderables,
553	Pass* pass, const LightList *manualLightList, unsigned long flags,
554	bool secondpass, bool zfail, bool twosided);
555	typedef std::vector<ShadowCaster*> ShadowCasterList;
556	ShadowCasterList mShadowCasterList;
557	SphereSceneQuery* mShadowCasterSphereQuery;
558	AxisAlignedBoxSceneQuery* mShadowCasterAABBQuery;
559	Real mShadowFarDist;
560	Real mShadowFarDistSquared;
561	Real mShadowTextureOffset; // proportion of texture offset in view direction e.g. 0.4
562	Real mShadowTextureFadeStart; // as a proportion e.g. 0.6
563	Real mShadowTextureFadeEnd; // as a proportion e.g. 0.9
564	bool mShadowTextureSelfShadow;
565	Pass* mShadowTextureCustomCasterPass;
566	Pass* mShadowTextureCustomReceiverPass;
567	String mShadowTextureCustomCasterVertexProgram;
568	String mShadowTextureCustomReceiverVertexProgram;
569	GpuProgramParametersSharedPtr mShadowTextureCustomCasterVPParams;
570	GpuProgramParametersSharedPtr mShadowTextureCustomReceiverVPParams;
571	bool mShadowTextureCasterVPDirty;
572	bool mShadowTextureReceiverVPDirty;
573
574	/// Visibility mask used to show / hide objects
575	uint32 mVisibilityMask;
576	bool mFindVisibleObjects;
577
578	/// Suppress render state changes?
579	bool mSuppressRenderStateChanges;
580	/// Suppress shadows?
581	bool mSuppressShadows;
582
583
584	GpuProgramParametersSharedPtr mInfiniteExtrusionParams;
585	GpuProgramParametersSharedPtr mFiniteExtrusionParams;
586
587	/// Inner class to use as callback for shadow caster scene query
588	class _OgreExport ShadowCasterSceneQueryListener : public SceneQueryListener
589	{
590	protected:
591	SceneManager* mSceneMgr;
592	ShadowCasterList* mCasterList;
593	bool mIsLightInFrustum;
594	const PlaneBoundedVolumeList* mLightClipVolumeList;
595	const Camera* mCamera;
596	const Light* mLight;
597	Real mFarDistSquared;
598	public:
599	ShadowCasterSceneQueryListener(SceneManager* sm) : mSceneMgr(sm),
600	mCasterList(0), mIsLightInFrustum(false), mLightClipVolumeList(0),
601	mCamera(0) {}
602	// Prepare the listener for use with a set of parameters
603	void prepare(bool lightInFrustum,
604	const PlaneBoundedVolumeList* lightClipVolumes,
605	const Light* light, const Camera* cam, ShadowCasterList* casterList,
606	Real farDistSquared)
607	{
608	mCasterList = casterList;
609	mIsLightInFrustum = lightInFrustum;
610	mLightClipVolumeList = lightClipVolumes;
611	mCamera = cam;
612	mLight = light;
613	mFarDistSquared = farDistSquared;
614	}
615	bool queryResult(MovableObject* object);
616	bool queryResult(SceneQuery::WorldFragment* fragment);
617	};
618
619	ShadowCasterSceneQueryListener* mShadowCasterQueryListener;
620
621	/** Internal method for locating a list of shadow casters which
622	could be affecting the frustum for a given light.
623	@remarks
624	Custom scene managers are encouraged to override this method to add optimisations,
625	and to add their own custom shadow casters (perhaps for world geometry)
626	*/
627	virtual const ShadowCasterList& findShadowCastersForLight(const Light* light,
628	const Camera* camera);
629	/** Render a group in the ordinary way */
630	virtual void renderBasicQueueGroupObjects(RenderQueueGroup* pGroup,
631	QueuedRenderableCollection::OrganisationMode om);
632	/** Render a group with the added complexity of additive stencil shadows. */
633	virtual void renderAdditiveStencilShadowedQueueGroupObjects(RenderQueueGroup* group,
634	QueuedRenderableCollection::OrganisationMode om);
635	/** Render a group with the added complexity of modulative stencil shadows. */
636	virtual void renderModulativeStencilShadowedQueueGroupObjects(RenderQueueGroup* group,
637	QueuedRenderableCollection::OrganisationMode om);
638	/** Render a group rendering only shadow casters. */
639	virtual void renderTextureShadowCasterQueueGroupObjects(RenderQueueGroup* group,
640	QueuedRenderableCollection::OrganisationMode om);
641	/** Render a group rendering only shadow receivers. */
642	virtual void renderTextureShadowReceiverQueueGroupObjects(RenderQueueGroup* group,
643	QueuedRenderableCollection::OrganisationMode om);
644	/** Render a group with the added complexity of modulative texture shadows. */
645	virtual void renderModulativeTextureShadowedQueueGroupObjects(RenderQueueGroup* group,
646	QueuedRenderableCollection::OrganisationMode om);
647
648	/** Render a group with additive texture shadows. */
649	virtual void renderAdditiveTextureShadowedQueueGroupObjects(RenderQueueGroup* group,
650	QueuedRenderableCollection::OrganisationMode om);
651	/** Render a set of objects, see renderSingleObject for param definitions */
652	virtual void renderObjects(const QueuedRenderableCollection& objs,
653	QueuedRenderableCollection::OrganisationMode om,
654	bool doLightIteration, const LightList* manualLightList = 0);
655	/** Render those objects in the transparent pass list which have shadow casting forced on
656	@remarks
657	This function is intended to be used to render the shadows of transparent objects which have
658	transparency_casts_shadows set to 'on' in their material
659	*/
660	virtual void renderTransparentShadowCasterObjects(const QueuedRenderableCollection& objs,
661	QueuedRenderableCollection::OrganisationMode om,
662	bool doLightIteration, const LightList* manualLightList = 0);
663
664	/** Update the state of the global render queue splitting based on a shadow
665	option change. */
666	virtual void updateRenderQueueSplitOptions(void);
667	/** Update the state of the render queue group splitting based on a shadow
668	option change. */
669	virtual void updateRenderQueueGroupSplitOptions(RenderQueueGroup* group,
670	bool suppressShadows, bool suppressRenderState);
671
672	/** Inner helper class to implement the visitor pattern for rendering objects
673	in a queue.
674	*/
675	class _OgreExport SceneMgrQueuedRenderableVisitor : public QueuedRenderableVisitor
676	{
677	protected:
678	/// Pass that was actually used at the grouping level
679	const Pass* mUsedPass;
680	public:
681	SceneMgrQueuedRenderableVisitor()
682	:transparentShadowCastersMode(false) {}
683	~SceneMgrQueuedRenderableVisitor() {}
684	void visit(const Renderable* r);
685	bool visit(const Pass* p);
686	void visit(const RenderablePass* rp);
687
688	/// Target SM to send renderables to
689	SceneManager* targetSceneMgr;
690	/// Are we in transparent shadow caster mode?
691	bool transparentShadowCastersMode;
692	/// Automatic light handling?
693	bool autoLights;
694	/// Manual light list
695	const LightList* manualLightList;
696
697	};
698	/// Allow visitor helper to access protected methods
699	friend class SceneMgrQueuedRenderableVisitor;
700	/// The active renderable visitor class - subclasses could override this
701	SceneMgrQueuedRenderableVisitor* mActiveQueuedRenderableVisitor;
702	/// Storage for default renderable visitor
703	SceneMgrQueuedRenderableVisitor mDefaultQueuedRenderableVisitor;
704
705	public:
706	/** Constructor.
707	*/
708	SceneManager(const String& instanceName);
709
710	/** Default destructor.
711	*/
712	virtual ~SceneManager();
713
714	/** Return the instance name of this SceneManager. */
715	const String& getName(void) const { return mName; }
716
717	/** Retrieve the type name of this scene manager.
718	@remarks
719	This method has to be implemented by subclasses. It should
720	return the type name of this SceneManager which agrees with
721	the type name of the SceneManagerFactory which created it.
722	*/
723	virtual const String& getTypeName(void) const = 0;
724
725	/** Creates a camera to be managed by this scene manager.
726	@remarks
727	This camera must be added to the scene at a later time using
728	the attachObject method of the SceneNode class.
729	@param
730	name Name to give the new camera.
731	*/
732	virtual Camera* createCamera(const String& name);
733
734	/** Retrieves a pointer to the named camera.
735	*/
736	virtual Camera* getCamera(const String& name);
737
738	/** Removes a camera from the scene.
739	@remarks
740	This method removes a previously added camera from the scene.
741	The camera is deleted so the caller must ensure no references
742	to it's previous instance (e.g. in a SceneNode) are used.
743	@param
744	cam Pointer to the camera to remove
745	*/
746	virtual void destroyCamera(Camera *cam);
747
748	/** Removes a camera from the scene.
749	@remarks
750	This method removes an camera from the scene based on the
751	camera's name rather than a pointer.
752	*/
753	virtual void destroyCamera(const String& name);
754
755	/** Removes (and destroys) all cameras from the scene.
756	@remarks
757	Some cameras are internal created to dealing with texture shadow,
758	their aren't supposed to destroy outside. So, while you are using
759	texture shadow, don't call this method, or you can set the shadow
760	technique other than texture-based, which will destroy all internal
761	created shadow cameras and textures.
762	*/
763	virtual void destroyAllCameras(void);
764
765	/** Creates a light for use in the scene.
766	@remarks
767	Lights can either be in a fixed position and independent of the
768	scene graph, or they can be attached to SceneNodes so they derive
769	their position from the parent node. Either way, they are created
770	using this method so that the SceneManager manages their
771	existence.
772	@param
773	name The name of the new light, to identify it later.
774	*/
775	virtual Light* createLight(const String& name);
776
777	/** Returns a pointer to the named Light which has previously been added to the scene.
778	*/
779	virtual Light* getLight(const String& name);
780
781	/** Removes the named light from the scene and destroys it.
782	@remarks
783	Any pointers held to this light after calling this method will be invalid.
784	*/
785	virtual void destroyLight(const String& name);
786
787	/** Removes the light from the scene and destroys it based on a pointer.
788	@remarks
789	Any pointers held to this light after calling this method will be invalid.
790	*/
791	virtual void destroyLight(Light* light);
792	/** Removes and destroys all lights in the scene.
793	*/
794	virtual void destroyAllLights(void);
795
796	/** Populate a light list with an ordered set of the lights which are closest
797	to the position specified.
798	@remarks
799	Note that since directional lights have no position, they are always considered
800	closer than any point lights and as such will always take precedence.
801	@par
802	Subclasses of the default SceneManager may wish to take into account other issues
803	such as possible visibility of the light if that information is included in their
804	data structures. This basic scenemanager simply orders by distance, eliminating
805	those lights which are out of range.
806	@par
807	The number of items in the list max exceed the maximum number of lights supported
808	by the renderer, but the extraneous ones will never be used. In fact the limit will
809	be imposed by Pass::getMaxSimultaneousLights.
810	@param position The position at which to evaluate the list of lights
811	@param radius The bounding radius to test
812	@param destList List to be populated with ordered set of lights; will be cleared by
813	this method before population.
814	*/
815	virtual void _populateLightList(const Vector3& position, Real radius, LightList& destList);
816
817
818	/** Creates an instance of a SceneNode.
819	@remarks
820	Note that this does not add the SceneNode to the scene hierarchy.
821	This method is for convenience, since it allows an instance to
822	be created for which the SceneManager is responsible for
823	allocating and releasing memory, which is convenient in complex
824	scenes.
825	@par
826	To include the returned SceneNode in the scene, use the addChild
827	method of the SceneNode which is to be it's parent.
828	@par
829	Note that this method takes no parameters, and the node created is unnamed (it is
830	actually given a generated name, which you can retrieve if you want).
831	If you wish to create a node with a specific name, call the alternative method
832	which takes a name parameter.
833	*/
834	virtual SceneNode* createSceneNode(void);
835
836	/** Creates an instance of a SceneNode with a given name.
837	@remarks
838	Note that this does not add the SceneNode to the scene hierarchy.
839	This method is for convenience, since it allows an instance to
840	be created for which the SceneManager is responsible for
841	allocating and releasing memory, which is convenient in complex
842	scenes.
843	@par
844	To include the returned SceneNode in the scene, use the addChild
845	method of the SceneNode which is to be it's parent.
846	@par
847	Note that this method takes a name parameter, which makes the node easier to
848	retrieve directly again later.
849	*/
850	virtual SceneNode* createSceneNode(const String& name);
851
852	/** Destroys a SceneNode with a given name.
853	@remarks
854	This allows you to physically delete an individual SceneNode if you want to.
855	Note that this is not normally recommended, it's better to allow SceneManager
856	to delete the nodes when the scene is cleared.
857	*/
858	virtual void destroySceneNode(const String& name);
859
860	/** Gets the SceneNode at the root of the scene hierarchy.
861	@remarks
862	The entire scene is held as a hierarchy of nodes, which
863	allows things like relative transforms, general changes in
864	rendering state etc (See the SceneNode class for more info).
865	In this basic SceneManager class, the application using
866	Ogre is free to structure this hierarchy however it likes,
867	since it has no real significance apart from making transforms
868	relative to each node (more specialised subclasses will
869	provide utility methods for building specific node structures
870	e.g. loading a BSP tree).
871	@par
872	However, in all cases there is only ever one root node of
873	the hierarchy, and this method returns a pointer to it.
874	*/
875	virtual SceneNode* getRootSceneNode(void) const;
876
877	/** Retrieves a named SceneNode from the scene graph.
878	@remarks
879	If you chose to name a SceneNode as you created it, or if you
880	happened to make a note of the generated name, you can look it
881	up wherever it is in the scene graph using this method.
882	*/
883	virtual SceneNode* getSceneNode(const String& name) const;
884
885	/** Create an Entity (instance of a discrete mesh).
886	@param
887	entityName The name to be given to the entity (must be unique).
888	@param
889	meshName The name of the Mesh it is to be based on (e.g. 'knot.oof'). The
890	mesh will be loaded if it is not already.
891	*/
892	virtual Entity* createEntity(const String& entityName, const String& meshName);
893
894	/** Prefab shapes available without loading a model.
895	@note
896	Minimal implementation at present.
897	@todo
898	Add more prefabs (teapots, teapots!!!)
899	*/
900	enum PrefabType {
901	PT_PLANE
902	};
903
904	/** Create an Entity (instance of a discrete mesh) from a range of prefab shapes.
905	@param
906	entityName The name to be given to the entity (must be unique).
907	@param
908	ptype The prefab type.
909	*/
910	virtual Entity* createEntity(const String& entityName, PrefabType ptype);
911	/** Retrieves a pointer to the named Entity. */
912	virtual Entity* getEntity(const String& name);
913
914	/** Removes & destroys an Entity from the SceneManager.
915	@warning
916	Must only be done if the Entity is not attached
917	to a SceneNode. It may be safer to wait to clear the whole
918	scene if you are unsure use clearScene.
919	@see
920	SceneManager::clearScene
921	*/
922	virtual void destroyEntity(Entity* ent);
923
924	/** Removes & destroys an Entity from the SceneManager by name.
925	@warning
926	Must only be done if the Entity is not attached
927	to a SceneNode. It may be safer to wait to clear the whole
928	scene if you are unsure use clearScene.
929	@see
930	SceneManager::clearScene
931	*/
932	virtual void destroyEntity(const String& name);
933
934	/** Removes & destroys all Entities.
935	@warning
936	Again, use caution since no Entity must be referred to
937	elsewhere e.g. attached to a SceneNode otherwise a crash
938	is likely. Use clearScene if you are unsure (it clears SceneNode
939	entries too.)
940	@see
941	SceneManager::clearScene
942	*/
943	virtual void destroyAllEntities(void);
944
945	/** Create a ManualObject, an object which you populate with geometry
946	manually through a GL immediate-mode style interface.
947	@param
948	name The name to be given to the object (must be unique).
949	*/
950	virtual ManualObject* createManualObject(const String& name);
951	/** Retrieves a pointer to the named ManualObject. */
952	virtual ManualObject* getManualObject(const String& name);
953
954	/** Removes & destroys a ManualObject from the SceneManager.
955	*/
956	virtual void destroyManualObject(ManualObject* obj);
957	/** Removes & destroys a ManualObject from the SceneManager.
958	*/
959	virtual void destroyManualObject(const String& name);
960	/** Removes & destroys all ManualObjects from the SceneManager.
961	*/
962	virtual void destroyAllManualObjects(void);
963	/** Create a BillboardChain, an object which you can use to render
964	a linked chain of billboards.
965	@param
966	name The name to be given to the object (must be unique).
967	*/
968	virtual BillboardChain* createBillboardChain(const String& name);
969	/** Retrieves a pointer to the named BillboardChain. */
970	virtual BillboardChain* getBillboardChain(const String& name);
971
972	/** Removes & destroys a BillboardChain from the SceneManager.
973	*/
974	virtual void destroyBillboardChain(BillboardChain* obj);
975	/** Removes & destroys a BillboardChain from the SceneManager.
976	*/
977	virtual void destroyBillboardChain(const String& name);
978	/** Removes & destroys all BillboardChains from the SceneManager.
979	*/
980	virtual void destroyAllBillboardChains(void);
981	/** Create a RibbonTrail, an object which you can use to render
982	a linked chain of billboards which follows one or more nodes.
983	@param
984	name The name to be given to the object (must be unique).
985	*/
986	virtual RibbonTrail* createRibbonTrail(const String& name);
987	/** Retrieves a pointer to the named RibbonTrail. */
988	virtual RibbonTrail* getRibbonTrail(const String& name);
989
990	/** Removes & destroys a RibbonTrail from the SceneManager.
991	*/
992	virtual void destroyRibbonTrail(RibbonTrail* obj);
993	/** Removes & destroys a RibbonTrail from the SceneManager.
994	*/
995	virtual void destroyRibbonTrail(const String& name);
996	/** Removes & destroys all RibbonTrails from the SceneManager.
997	*/
998	virtual void destroyAllRibbonTrails(void);
999
1000	/** Creates a particle system based on a template.
1001	@remarks
1002	This method creates a new ParticleSystem instance based on the named template
1003	(defined through ParticleSystemManager::createTemplate) and returns a
1004	pointer to the caller. The caller should not delete this object, it will be freed at system shutdown,
1005	or can be released earlier using the destroyParticleSystem method.
1006	@par
1007	Each system created from a template takes the template's settings at the time of creation,
1008	but is completely separate from the template from there on.
1009	@par
1010	Creating a particle system does not make it a part of the scene. As with other MovableObject
1011	subclasses, a ParticleSystem is not rendered until it is attached to a SceneNode.
1012	@par
1013	This is probably the more useful particle system creation method since it does not require manual
1014	setup of the system. Note that the initial quota is based on the template but may be changed later.
1015	@param
1016	name The name to give the new particle system instance.
1017	@param
1018	templateName The name of the template to base the new instance on.
1019	*/
1020	virtual ParticleSystem* createParticleSystem(const String& name,
1021	const String& templateName);
1022	/** Create a blank particle system.
1023	@remarks
1024	This method creates a new, blank ParticleSystem instance and returns a pointer to it.
1025	The caller should not delete this object, it will be freed at system shutdown, or can
1026	be released earlier using the destroyParticleSystem method.
1027	@par
1028	The instance returned from this method won't actually do anything because on creation a
1029	particle system has no emitters. The caller should manipulate the instance through it's
1030	ParticleSystem methods to actually create a real particle effect.
1031	@par
1032	Creating a particle system does not make it a part of the scene. As with other MovableObject
1033	subclasses, a ParticleSystem is not rendered until it is attached to a SceneNode.
1034	@param
1035	name The name to give the ParticleSystem.
1036	@param
1037	quota The maximum number of particles to allow in this system.
1038	@param
1039	resourceGroup The resource group which will be used to load dependent resources
1040	*/
1041	virtual ParticleSystem* createParticleSystem(const String& name,
1042	size_t quota = 500,
1043	const String& resourceGroup = ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
1044	/** Retrieves a pointer to the named ParticleSystem. */
1045	virtual ParticleSystem* getParticleSystem(const String& name);
1046
1047	/** Removes & destroys a ParticleSystem from the SceneManager.
1048	*/
1049	virtual void destroyParticleSystem(ParticleSystem* obj);
1050	/** Removes & destroys a ParticleSystem from the SceneManager.
1051	*/
1052	virtual void destroyParticleSystem(const String& name);
1053	/** Removes & destroys all ParticleSystems from the SceneManager.
1054	*/
1055	virtual void destroyAllParticleSystems(void);
1056
1057	/** Empties the entire scene, inluding all SceneNodes, Entities, Lights,
1058	BillboardSets etc. Cameras are not deleted at this stage since
1059	they are still referenced by viewports, which are not destroyed during
1060	this process.
1061	*/
1062	virtual void clearScene(void);
1063
1064	/** Sets the ambient light level to be used for the scene.
1065	@remarks
1066	This sets the colour and intensity of the ambient light in the scene, i.e. the
1067	light which is 'sourceless' and illuminates all objects equally.
1068	The colour of an object is affected by a combination of the light in the scene,
1069	and the amount of light that object reflects (in this case based on the Material::ambient
1070	property).
1071	@remarks
1072	By default the ambient light in the scene is ColourValue::Black, i.e. no ambient light. This
1073	means that any objects rendered with a Material which has lighting enabled (see Material::setLightingEnabled)
1074	will not be visible unless you have some dynamic lights in your scene.
1075	*/
1076	void setAmbientLight(const ColourValue& colour);
1077
1078	/** Returns the ambient light level to be used for the scene.
1079	*/
1080	const ColourValue& getAmbientLight(void) const;
1081
1082	/** Sets the source of the 'world' geometry, i.e. the large, mainly static geometry
1083	making up the world e.g. rooms, landscape etc.
1084	@remarks
1085	Depending on the type of SceneManager (subclasses will be specialised
1086	for particular world geometry types) you have requested via the Root or
1087	SceneManagerEnumerator classes, you can pass a filename to this method and it
1088	will attempt to load the world-level geometry for use. If you try to load
1089	an inappropriate type of world data an exception will be thrown. The default
1090	SceneManager cannot handle any sort of world geometry and so will always
1091	throw an exception. However subclasses like BspSceneManager can load
1092	particular types of world geometry e.g. "q3dm1.bsp".
1093	*/
1094	virtual void setWorldGeometry(const String& filename);
1095
1096	/** Sets the source of the 'world' geometry, i.e. the large, mainly
1097	static geometry making up the world e.g. rooms, landscape etc.
1098	@remarks
1099	Depending on the type of SceneManager (subclasses will be
1100	specialised for particular world geometry types) you have
1101	requested via the Root or SceneManagerEnumerator classes, you
1102	can pass a stream to this method and it will attempt to load
1103	the world-level geometry for use. If the manager can only
1104	handle one input format the typeName parameter is not required.
1105	The stream passed will be read (and it's state updated).
1106	@param stream Data stream containing data to load
1107	@param typeName String identifying the type of world geometry
1108	contained in the stream - not required if this manager only
1109	supports one type of world geometry.
1110	*/
1111	virtual void setWorldGeometry(DataStreamPtr& stream,
1112	const String& typeName = StringUtil::BLANK);
1113
1114	/** Estimate the number of loading stages required to load the named
1115	world geometry.
1116	@remarks
1117	This method should be overridden by SceneManagers that provide
1118	custom world geometry that can take some time to load. They should
1119	return from this method a count of the number of stages of progress
1120	they can report on whilst loading. During real loading (setWorldGeomtry),
1121	they should call ResourceGroupManager::_notifyWorldGeometryProgress exactly
1122	that number of times when loading the geometry for real.
1123	@note
1124	The default is to return 0, ie to not report progress.
1125	*/
1126	virtual size_t estimateWorldGeometry(const String& filename) { return 0; }
1127
1128	/** Estimate the number of loading stages required to load the named
1129	world geometry.
1130	@remarks
1131	Operates just like the version of this method which takes a
1132	filename, but operates on a stream instead. Note that since the
1133	stream is updated, you'll need to reset the stream or reopen it
1134	when it comes to loading it for real.
1135	@param stream Data stream containing data to load
1136	@param typeName String identifying the type of world geometry
1137	contained in the stream - not required if this manager only
1138	supports one type of world geometry.
1139	*/
1140	virtual size_t estimateWorldGeometry(DataStreamPtr& stream,
1141	const String& typeName = StringUtil::BLANK) { return 0; }
1142	/** Asks the SceneManager to provide a suggested viewpoint from which the scene should be viewed.
1143	@remarks
1144	Typically this method returns the origin unless a) world geometry has been loaded using
1145	SceneManager::setWorldGeometry and b) that world geometry has suggested 'start' points.
1146	If there is more than one viewpoint which the scene manager can suggest, it will always suggest
1147	the first one unless the random parameter is true.
1148	@param
1149	random If true, and there is more than one possible suggestion, a random one will be used. If false
1150	the same one will always be suggested.
1151	@return
1152	On success, true is returned.
1153	@par
1154	On failiure, false is returned.
1155	*/
1156	virtual ViewPoint getSuggestedViewpoint(bool random = false);
1157
1158	/** Method for setting a specific option of the Scene Manager. These options are usually
1159	specific for a certain implemntation of the Scene Manager class, and may (and probably
1160	will) not exist across different implementations.
1161	@param
1162	strKey The name of the option to set
1163	@param
1164	pValue A pointer to the value - the size should be calculated by the scene manager
1165	based on the key
1166	@return
1167	On success, true is returned.
1168	@par
1169	On failiure, false is returned.
1170	*/
1171	virtual bool setOption( const String& strKey, const void* pValue ) { return false; }
1172
1173	/** Method for getting the value of an implementation-specific Scene Manager option.
1174	@param
1175	strKey The name of the option
1176	@param
1177	pDestValue A pointer to a memory location where the value will
1178	be copied. Currently, the memory will be allocated by the
1179	scene manager, but this may change
1180	@return
1181	On success, true is returned and pDestValue points to the value of the given
1182	option.
1183	@par
1184	On failiure, false is returned and pDestValue is set to NULL.
1185	*/
1186	virtual bool getOption( const String& strKey, void* pDestValue ) { return false; }
1187
1188	/** Method for verifying wether the scene manager has an implementation-specific
1189	option.
1190	@param
1191	strKey The name of the option to check for.
1192	@return
1193	If the scene manager contains the given option, true is returned.
1194	@remarks
1195	If it does not, false is returned.
1196	*/
1197	virtual bool hasOption( const String& strKey ) const { return false; }
1198	/** Method for getting all possible values for a specific option. When this list is too large
1199	(i.e. the option expects, for example, a float), the return value will be true, but the
1200	list will contain just one element whose size will be set to 0.
1201	Otherwise, the list will be filled with all the possible values the option can
1202	accept.
1203	@param
1204	strKey The name of the option to get the values for.
1205	@param
1206	refValueList A reference to a list that will be filled with the available values.
1207	@return
1208	On success (the option exists), true is returned.
1209	@par
1210	On failure, false is returned.
1211	*/
1212	virtual bool getOptionValues( const String& strKey, StringVector& refValueList ) { return false; }
1213
1214	/** Method for getting all the implementation-specific options of the scene manager.
1215	@param
1216	refKeys A reference to a list that will be filled with all the available options.
1217	@return
1218	On success, true is returned. On failiure, false is returned.
1219	*/
1220	virtual bool getOptionKeys( StringVector& refKeys ) { return false; }
1221
1222	/** Internal method for updating the scene graph ie the tree of SceneNode instances managed by this class.
1223	@remarks
1224	This must be done before issuing objects to the rendering pipeline, since derived transformations from
1225	parent nodes are not updated until required. This SceneManager is a basic implementation which simply
1226	updates all nodes from the root. This ensures the scene is up to date but requires all the nodes
1227	to be updated even if they are not visible. Subclasses could trim this such that only potentially visible
1228	nodes are updated.
1229	*/
1230	virtual void _updateSceneGraph(Camera* cam);
1231
1232	/** Internal method which parses the scene to find visible objects to render.
1233	@remarks
1234	If you're implementing a custom scene manager, this is the most important method to
1235	override since it's here you can apply your custom world partitioning scheme. Once you
1236	have added the appropriate objects to the render queue, you can let the default
1237	SceneManager objects _renderVisibleObjects handle the actual rendering of the objects
1238	you pick.
1239	@par
1240	Any visible objects will be added to a rendering queue, which is indexed by material in order
1241	to ensure objects with the same material are rendered together to minimise render state changes.
1242	*/
1243	virtual void _findVisibleObjects(Camera* cam, bool onlyShadowCasters);
1244
1245	/** Internal method for applying animations to scene nodes.
1246	@remarks
1247	Uses the internally stored AnimationState objects to apply animation to SceneNodes.
1248	*/
1249	virtual void _applySceneAnimations(void);
1250
1251	/** Sends visible objects found in _findVisibleObjects to the rendering engine.
1252	*/
1253	virtual void _renderVisibleObjects(void);
1254
1255	/** Prompts the class to send its contents to the renderer.
1256	@remarks
1257	This method prompts the scene manager to send the
1258	contents of the scene it manages to the rendering
1259	pipeline, possibly preceded by some sorting, culling
1260	or other scene management tasks. Note that this method is not normally called
1261	directly by the user application; it is called automatically
1262	by the Ogre rendering loop.
1263	@param camera Pointer to a camera from whose viewpoint the scene is to
1264	be rendered.
1265	@param vp The target viewport
1266	@param includeOverlays Whether or not overlay objects should be rendered
1267	*/
1268	virtual void _renderScene(Camera* camera, Viewport* vp, bool includeOverlays);
1269
1270	/** Internal method for queueing the sky objects with the params as
1271	previously set through setSkyBox, setSkyPlane and setSkyDome.
1272	*/
1273	virtual void _queueSkiesForRendering(Camera* cam);
1274
1275
1276
1277	/** Notifies the scene manager of its destination render system
1278	@remarks
1279	Called automatically by RenderSystem::addSceneManager
1280	this method simply notifies the manager of the render
1281	system to which its output must be directed.
1282	@param
1283	sys Pointer to the RenderSystem subclass to be used as a render target.
1284	*/
1285	virtual void _setDestinationRenderSystem(RenderSystem* sys);
1286
1287	/** Enables / disables a 'sky plane' i.e. a plane at constant
1288	distance from the camera representing the sky.
1289	@remarks
1290	You can create sky planes yourself using the standard mesh and
1291	entity methods, but this creates a plane which the camera can
1292	never get closer or further away from - it moves with the camera.
1293	(NB you could create this effect by creating a world plane which
1294	was attached to the same SceneNode as the Camera too, but this
1295	would only apply to a single camera whereas this plane applies to
1296	any camera using this scene manager).
1297	@note
1298	To apply scaling, scrolls etc to the sky texture(s) you
1299	should use the TextureUnitState class methods.
1300	@param
1301	enable True to enable the plane, false to disable it
1302	@param
1303	plane Details of the plane, i.e. it's normal and it's
1304	distance from the camera.
1305	@param
1306	materialName The name of the material the plane will use
1307	@param
1308	scale The scaling applied to the sky plane - higher values
1309	mean a bigger sky plane - you may want to tweak this
1310	depending on the size of plane.d and the other
1311	characteristics of your scene
1312	@param
1313	tiling How many times to tile the texture across the sky.
1314	Applies to all texture layers. If you need finer control use
1315	the TextureUnitState texture coordinate transformation methods.
1316	@param
1317	drawFirst If true, the plane is drawn before all other
1318	geometry in the scene, without updating the depth buffer.
1319	This is the safest rendering method since all other objects
1320	will always appear in front of the sky. However this is not
1321	the most efficient way if most of the sky is often occluded
1322	by other objects. If this is the case, you can set this
1323	parameter to false meaning it draws <em>after</em> all other
1324	geometry which can be an optimisation - however you must
1325	ensure that the plane.d value is large enough that no objects
1326	will 'poke through' the sky plane when it is rendered.
1327	@param
1328	bow If zero, the plane will be completely flat (like previous
1329	versions. If above zero, the plane will be curved, allowing
1330	the sky to appear below camera level. Curved sky planes are
1331	simular to skydomes, but are more compatable with fog.
1332	@param xsegments, ysegments
1333	Determines the number of segments the plane will have to it. This
1334	is most important when you are bowing the plane, but may also be useful
1335	if you need tesselation on the plane to perform per-vertex effects.
1336	@param groupName
1337	The name of the resource group to which to assign the plane mesh.
1338	*/
1339	virtual void setSkyPlane(
1340	bool enable,
1341	const Plane& plane, const String& materialName, Real scale = 1000,
1342	Real tiling = 10, bool drawFirst = true, Real bow = 0,
1343	int xsegments = 1, int ysegments = 1,
1344	const String& groupName = ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
1345
1346	/** Return whether a key plane is enabled */
1347	virtual bool isSkyPlaneEnabled(void) const { return mSkyPlaneEnabled; }
1348
1349	/** Get the sky plane node, if enabled. */
1350	virtual SceneNode* getSkyPlaneNode(void) const { return mSkyPlaneNode; }
1351
1352	/ Get the parameters used to construct the SkyPlane, if any /
1353	virtual const SkyPlaneGenParameters& getSkyPlaneGenParameters(void) const { return mSkyPlaneGenParameters; }
1354
1355	/** Enables / disables a 'sky box' i.e. a 6-sided box at constant
1356	distance from the camera representing the sky.
1357	@remarks
1358	You could create a sky box yourself using the standard mesh and
1359	entity methods, but this creates a plane which the camera can
1360	never get closer or further away from - it moves with the camera.
1361	(NB you could create this effect by creating a world box which
1362	was attached to the same SceneNode as the Camera too, but this
1363	would only apply to a single camera whereas this skybox applies
1364	to any camera using this scene manager).
1365	@par
1366	The material you use for the skybox can either contain layers
1367	which are single textures, or they can be cubic textures, i.e.
1368	made up of 6 images, one for each plane of the cube. See the
1369	TextureUnitState class for more information.
1370	@param
1371	enable True to enable the skybox, false to disable it
1372	@param
1373	materialName The name of the material the box will use
1374	@param
1375	distance Distance in world coorinates from the camera to
1376	each plane of the box. The default is normally OK.
1377	@param
1378	drawFirst If true, the box is drawn before all other
1379	geometry in the scene, without updating the depth buffer.
1380	This is the safest rendering method since all other objects
1381	will always appear in front of the sky. However this is not
1382	the most efficient way if most of the sky is often occluded
1383	by other objects. If this is the case, you can set this
1384	parameter to false meaning it draws <em>after</em> all other
1385	geometry which can be an optimisation - however you must
1386	ensure that the distance value is large enough that no
1387	objects will 'poke through' the sky box when it is rendered.
1388	@param
1389	orientation Optional parameter to specify the orientation
1390	of the box. By default the 'top' of the box is deemed to be
1391	in the +y direction, and the 'front' at the -z direction.
1392	You can use this parameter to rotate the sky if you want.
1393	@param groupName
1394	The name of the resource group to which to assign the plane mesh.
1395	*/
1396	virtual void setSkyBox(
1397	bool enable, const String& materialName, Real distance = 5000,
1398	bool drawFirst = true, const Quaternion& orientation = Quaternion::IDENTITY,
1399	const String& groupName = ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
1400
1401	/** Return whether a skybox is enabled */
1402	virtual bool isSkyBoxEnabled(void) const { return mSkyBoxEnabled; }
1403
1404	/** Get the skybox node, if enabled. */
1405	virtual SceneNode* getSkyBoxNode(void) const { return mSkyBoxNode; }
1406
1407	/** Get the parameters used to generate the current SkyBox, if any */
1408	virtual const SkyBoxGenParameters& getSkyBoxGenParameters(void) const { return mSkyBoxGenParameters; }
1409
1410	/** Enables / disables a 'sky dome' i.e. an illusion of a curved sky.
1411	@remarks
1412	A sky dome is actually formed by 5 sides of a cube, but with
1413	texture coordinates generated such that the surface appears
1414	curved like a dome. Sky domes are appropriate where you need a
1415	realistic looking sky where the scene is not going to be
1416	'fogged', and there is always a 'floor' of some sort to prevent
1417	the viewer looking below the horizon (the distortion effect below
1418	the horizon can be pretty horrible, and there is never anyhting
1419	directly below the viewer). If you need a complete wrap-around
1420	background, use the setSkyBox method instead. You can actually
1421	combine a sky box and a sky dome if you want, to give a positional
1422	backdrop with an overlayed curved cloud layer.
1423	@par
1424	Sky domes work well with 2D repeating textures like clouds. You
1425	can change the apparant 'curvature' of the sky depending on how
1426	your scene is viewed - lower curvatures are better for 'open'
1427	scenes like landscapes, whilst higher curvatures are better for
1428	say FPS levels where you don't see a lot of the sky at once and
1429	the exaggerated curve looks good.
1430	@param
1431	enable True to enable the skydome, false to disable it
1432	@param
1433	materialName The name of the material the dome will use
1434	@param
1435	curvature The curvature of the dome. Good values are
1436	between 2 and 65. Higher values are more curved leading to
1437	a smoother effect, lower values are less curved meaning
1438	more distortion at the horizons but a better distance effect.
1439	@param
1440	tiling How many times to tile the texture(s) across the
1441	dome.
1442	@param
1443	distance Distance in world coorinates from the camera to
1444	each plane of the box the dome is rendered on. The default
1445	is normally OK.
1446	@param
1447	drawFirst If true, the dome is drawn before all other
1448	geometry in the scene, without updating the depth buffer.
1449	This is the safest rendering method since all other objects
1450	will always appear in front of the sky. However this is not
1451	the most efficient way if most of the sky is often occluded
1452	by other objects. If this is the case, you can set this
1453	parameter to false meaning it draws <em>after</em> all other
1454	geometry which can be an optimisation - however you must
1455	ensure that the distance value is large enough that no
1456	objects will 'poke through' the sky when it is rendered.
1457	@param
1458	orientation Optional parameter to specify the orientation
1459	of the dome. By default the 'top' of the dome is deemed to
1460	be in the +y direction, and the 'front' at the -z direction.
1461	You can use this parameter to rotate the sky if you want.
1462	@param groupName
1463	The name of the resource group to which to assign the plane mesh.
1464	*/
1465	virtual void setSkyDome(
1466	bool enable, const String& materialName, Real curvature = 10,
1467	Real tiling = 8, Real distance = 4000, bool drawFirst = true,
1468	const Quaternion& orientation = Quaternion::IDENTITY,
1469	int xsegments = 16, int ysegments = 16, int ysegments_keep = -1,
1470	const String& groupName = ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
1471
1472	/** Return whether a skydome is enabled */
1473	virtual bool isSkyDomeEnabled(void) const { return mSkyDomeEnabled; }
1474
1475	/** Get the sky dome node, if enabled. */
1476	virtual SceneNode* getSkyDomeNode(void) const { return mSkyDomeNode; }
1477
1478	/** Get the parameters used to generate the current SkyDome, if any */
1479	virtual const SkyDomeGenParameters& getSkyDomeGenParameters(void) const { return mSkyDomeGenParameters; }
1480
1481	/** Sets the fogging mode applied to the scene.
1482	@remarks
1483	This method sets up the scene-wide fogging effect. These settings
1484	apply to all geometry rendered, UNLESS the material with which it
1485	is rendered has it's own fog settings (see Material::setFog).
1486	@param
1487	mode Set up the mode of fog as described in the FogMode
1488	enum, or set to FOG_NONE to turn off.
1489	@param
1490	colour The colour of the fog. Either set this to the same
1491	as your viewport background colour, or to blend in with a
1492	skydome or skybox.
1493	@param
1494	expDensity The density of the fog in FOG_EXP or FOG_EXP2
1495	mode, as a value between 0 and 1. The default is 0.001.
1496	@param
1497	linearStart Distance in world units at which linear fog starts to
1498	encroach. Only applicable if mode is
1499	FOG_LINEAR.
1500	@param
1501	linearEnd Distance in world units at which linear fog becomes completely
1502	opaque. Only applicable if mode is
1503	FOG_LINEAR.
1504	*/
1505	void setFog(
1506	FogMode mode = FOG_NONE, const ColourValue& colour = ColourValue::White,
1507	Real expDensity = 0.001, Real linearStart = 0.0, Real linearEnd = 1.0);
1508
1509	/** Returns the fog mode for the scene.
1510	*/
1511	virtual FogMode getFogMode(void) const;
1512
1513	/** Returns the fog colour for the scene.
1514	*/
1515	virtual const ColourValue& getFogColour(void) const;
1516
1517	/** Returns the fog start distance for the scene.
1518	*/
1519	virtual Real getFogStart(void) const;
1520
1521	/** Returns the fog end distance for the scene.
1522	*/
1523	virtual Real getFogEnd(void) const;
1524
1525	/** Returns the fog density for the scene.
1526	*/
1527	virtual Real getFogDensity(void) const;
1528
1529
1530	/** Creates a new BillboardSet for use with this scene manager.
1531	@remarks
1532	This method creates a new BillboardSet which is registered with
1533	the SceneManager. The SceneManager will destroy this object when
1534	it shuts down or when the SceneManager::clearScene method is
1535	called, so the caller does not have to worry about destroying
1536	this object (in fact, it definitely should not do this).
1537	@par
1538	See the BillboardSet documentations for full details of the
1539	returned class.
1540	@param
1541	name The name to give to this billboard set. Must be unique.
1542	@param
1543	poolSize The initial size of the pool of billboards (see BillboardSet for more information)
1544	@see
1545	BillboardSet
1546	*/
1547	virtual BillboardSet* createBillboardSet(const String& name, unsigned int poolSize = 20);
1548
1549	/** Retrieves a pointer to the named BillboardSet.
1550	*/
1551	virtual BillboardSet* getBillboardSet(const String& name);
1552
1553	/** Removes & destroys an BillboardSet from the SceneManager.
1554	@warning
1555	Must only be done if the BillboardSet is not attached
1556	to a SceneNode. It may be safer to wait to clear the whole
1557	scene. If you are unsure, use clearScene.
1558	*/
1559	virtual void destroyBillboardSet(BillboardSet* set);
1560
1561	/** Removes & destroys an BillboardSet from the SceneManager by name.
1562	@warning
1563	Must only be done if the BillboardSet is not attached
1564	to a SceneNode. It may be safer to wait to clear the whole
1565	scene. If you are unsure, use clearScene.
1566	*/
1567	virtual void destroyBillboardSet(const String& name);
1568
1569	/** Removes & destroys all BillboardSets.
1570	@warning
1571	Again, use caution since no BillboardSet must be referred to
1572	elsewhere e.g. attached to a SceneNode otherwise a crash
1573	is likely. Use clearScene if you are unsure (it clears SceneNode
1574	entries too.)
1575	@see
1576	SceneManager::clearScene
1577	*/
1578	virtual void destroyAllBillboardSets(void);
1579
1580	/** Tells the SceneManager whether it should render the SceneNodes which
1581	make up the scene as well as the objects in the scene.
1582	@remarks
1583	This method is mainly for debugging purposes. If you set this to 'true',
1584	each node will be rendered as a set of 3 axes to allow you to easily see
1585	the orientation of the nodes.
1586	*/
1587	virtual void setDisplaySceneNodes(bool display);
1588	/** Returns true if all scene nodes axis are to be displayed */
1589	virtual bool getDisplaySceneNodes(void) const {return mDisplayNodes;}
1590
1591	/** Creates an animation which can be used to animate scene nodes.
1592	@remarks
1593	An animation is a collection of 'tracks' which over time change the position / orientation
1594	of Node objects. In this case, the animation will likely have tracks to modify the position
1595	/ orientation of SceneNode objects, e.g. to make objects move along a path.
1596	@par
1597	You don't need to use an Animation object to move objects around - you can do it yourself
1598	using the methods of the Node in your FrameListener class. However, when you need relatively
1599	complex scripted animation, this is the class to use since it will interpolate between
1600	keyframes for you and generally make the whole process easier to manage.
1601	@par
1602	A single animation can affect multiple Node objects (each AnimationTrack affects a single Node).
1603	In addition, through animation blending a single Node can be affected by multiple animations,
1604	athough this is more useful when performing skeletal animation (see Skeleton::createAnimation).
1605	@par
1606	Note that whilst it uses the same classes, the animations created here are kept separate from the
1607	skeletal animations of meshes (each Skeleton owns those animations).
1608	@param name The name of the animation, must be unique within this SceneManager.
1609	@param length The total length of the animation.
1610	*/
1611	virtual Animation* createAnimation(const String& name, Real length);
1612
1613	/** Looks up an Animation object previously created with createAnimation. */
1614	virtual Animation* getAnimation(const String& name) const;
1615
1616	/** Destroys an Animation.
1617	@remarks
1618	You should ensure that none of your code is referencing this animation objects since the
1619	memory will be freed.
1620	*/
1621	virtual void destroyAnimation(const String& name);
1622
1623	/** Removes all animations created using this SceneManager. */
1624	virtual void destroyAllAnimations(void);
1625
1626	/** Create an AnimationState object for managing application of animations.
1627	@remarks
1628	You can create Animation objects for animating SceneNode obejcts using the
1629	createAnimation method. However, in order to actually apply those animations
1630	you have to call methods on Node and Animation in a particular order (namely
1631	Node::resetToInitialState and Animation::apply). To make this easier and to
1632	help track the current time position of animations, the AnimationState object
1633	is provided. </p>
1634	So if you don't want to control animation application manually, call this method,
1635	update the returned object as you like every frame and let SceneManager apply
1636	the animation state for you.
1637	@par
1638	Remember, AnimationState objects are disabled by default at creation time.
1639	Turn them on when you want them using their setEnabled method.
1640	@par
1641	Note that any SceneNode affected by this automatic animation will have it's state
1642	reset to it's initial position before application of the animation. Unless specifically
1643	modified using Node::setInitialState the Node assumes it's initial state is at the
1644	origin. If you want the base state of the SceneNode to be elsewhere, make your changes
1645	to the node using the standard transform methods, then call setInitialState to
1646	'bake' this reference position into the node.
1647	@param animName The name of an animation created already with createAnimation.
1648	*/
1649	virtual AnimationState* createAnimationState(const String& animName);
1650
1651	/** Retrieves animation state as previously created using createAnimationState */
1652	virtual AnimationState* getAnimationState(const String& animName);
1653
1654	/** Destroys an AnimationState.
1655	@remarks
1656	You should ensure that none of your code is referencing this animation
1657	state object since the memory will be freed.
1658	*/
1659	virtual void destroyAnimationState(const String& name);
1660
1661	/** Removes all animation states created using this SceneManager. */
1662	virtual void destroyAllAnimationStates(void);
1663
1664	/** Manual rendering method, for advanced users only.
1665	@remarks
1666	This method allows you to send rendering commands through the pipeline on
1667	demand, bypassing OGRE's normal world processing. You should only use this if you
1668	really know what you're doing; OGRE does lots of things for you that you really should
1669	let it do. However, there are times where it may be useful to have this manual interface,
1670	for example overlaying something on top of the scene rendered by OGRE.
1671	@par
1672	Because this is an instant rendering method, timing is important. The best
1673	time to call it is from a RenderTargetListener event handler.
1674	@par
1675	Don't call this method a lot, it's designed for rare (1 or 2 times per frame) use.
1676	Calling it regularly per frame will cause frame rate drops!
1677	@param rend A RenderOperation object describing the rendering op
1678	@param pass The Pass to use for this render
1679	@param vp Pointer to the viewport to render to
1680	@param worldMatrix The transform to apply from object to world space
1681	@param viewMatrix The transform to apply from world to view space
1682	@param projMatrix The transform to apply from view to screen space
1683	@param doBeginEndFrame If true, beginFrame() and endFrame() are called,
1684	otherwise not. You should leave this as false if you are calling
1685	this within the main render loop.
1686	*/
1687	virtual void manualRender(RenderOperation* rend, Pass* pass, Viewport* vp,
1688	const Matrix4& worldMatrix, const Matrix4& viewMatrix, const Matrix4& projMatrix,
1689	bool doBeginEndFrame = false) ;
1690
1691	/** Retrieves the internal render queue, for advanced users only.
1692	@remarks
1693	The render queue is mainly used internally to manage the scene object
1694	rendering queue, it also exports some methods to allow advanced users
1695	to configure the behavior of rendering process.
1696	Most methods provided by RenderQueue are supposed to be used
1697	internally only, you should reference to the RenderQueue API for
1698	more information. Do not access this directly unless you know what
1699	you are doing.
1700	*/
1701	virtual RenderQueue* getRenderQueue(void);
1702
1703	/** Registers a new RenderQueueListener which will be notified when render queues
1704	are processed.
1705	*/
1706	virtual void addRenderQueueListener(RenderQueueListener* newListener);
1707
1708	/** Removes a listener previously added with addRenderQueueListener. */
1709	virtual void removeRenderQueueListener(RenderQueueListener* delListener);
1710
1711	/** Adds an item to the 'special case' render queue list.
1712	@remarks
1713	Normally all render queues are rendered, in their usual sequence,
1714	only varying if a RenderQueueListener nominates for the queue to be
1715	repeated or skipped. This method allows you to add a render queue to
1716	a 'special case' list, which varies the behaviour. The effect of this
1717	list depends on the 'mode' in which this list is in, which might be
1718	to exclude these render queues, or to include them alone (excluding
1719	all other queues). This allows you to perform broad selective
1720	rendering without requiring a RenderQueueListener.
1721	@param qid The identifier of the queue which should be added to the
1722	special case list. Nothing happens if the queue is already in the list.
1723	*/
1724	virtual void addSpecialCaseRenderQueue(uint8 qid);
1725	/** Removes an item to the 'special case' render queue list.
1726	@see SceneManager::addSpecialCaseRenderQueue
1727	@param qid The identifier of the queue which should be removed from the
1728	special case list. Nothing happens if the queue is not in the list.
1729	*/
1730	virtual void removeSpecialCaseRenderQueue(uint8 qid);
1731	/** Clears the 'special case' render queue list.
1732	@see SceneManager::addSpecialCaseRenderQueue
1733	*/
1734	virtual void clearSpecialCaseRenderQueues(void);
1735	/** Sets the way the special case render queue list is processed.
1736	@see SceneManager::addSpecialCaseRenderQueue
1737	@param mode The mode of processing
1738	*/
1739	virtual void setSpecialCaseRenderQueueMode(SpecialCaseRenderQueueMode mode);
1740	/** Gets the way the special case render queue list is processed. */
1741	virtual SpecialCaseRenderQueueMode getSpecialCaseRenderQueueMode(void);
1742	/** Returns whether or not the named queue will be rendered based on the
1743	current 'special case' render queue list and mode.
1744	@see SceneManager::addSpecialCaseRenderQueue
1745	@param qid The identifier of the queue which should be tested
1746	@returns true if the queue will be rendered, false otherwise
1747	*/
1748	virtual bool isRenderQueueToBeProcessed(uint8 qid);
1749
1750	/** Sets the render queue that the world geometry (if any) this SceneManager
1751	renders will be associated with.
1752	@remarks
1753	SceneManagers which provide 'world geometry' should place it in a
1754	specialised render queue in order to make it possible to enable /
1755	disable it easily using the addSpecialCaseRenderQueue method. Even
1756	if the SceneManager does not use the render queues to render the
1757	world geometry, it should still pick a queue to represent it's manual
1758	rendering, and check isRenderQueueToBeProcessed before rendering.
1759	@note
1760	Setting this may not affect the actual ordering of rendering the
1761	world geometry, if the world geometry is being rendered manually
1762	by the SceneManager. If the SceneManager feeds world geometry into
1763	the queues, however, the ordering will be affected.
1764	*/
1765	virtual void setWorldGeometryRenderQueue(uint8 qid);
1766	/** Gets the render queue that the world geometry (if any) this SceneManager
1767	renders will be associated with.
1768	@remarks
1769	SceneManagers which provide 'world geometry' should place it in a
1770	specialised render queue in order to make it possible to enable /
1771	disable it easily using the addSpecialCaseRenderQueue method. Even
1772	if the SceneManager does not use the render queues to render the
1773	world geometry, it should still pick a queue to represent it's manual
1774	rendering, and check isRenderQueueToBeProcessed before rendering.
1775	*/
1776	virtual uint8 getWorldGeometryRenderQueue(void);
1777
1778	/** Allows all bounding boxes of scene nodes to be displayed. */
1779	virtual void showBoundingBoxes(bool bShow);
1780
1781	/** Returns if all bounding boxes of scene nodes are to be displayed */
1782	virtual bool getShowBoundingBoxes() const;
1783
1784	/** Internal method for notifying the manager that a SceneNode is autotracking. */
1785	virtual void _notifyAutotrackingSceneNode(SceneNode* node, bool autoTrack);
1786
1787
1788	/** Creates an AxisAlignedBoxSceneQuery for this scene manager.
1789	@remarks
1790	This method creates a new instance of a query object for this scene manager,
1791	for an axis aligned box region. See SceneQuery and AxisAlignedBoxSceneQuery
1792	for full details.
1793	@par
1794	The instance returned from this method must be destroyed by calling
1795	SceneManager::destroyQuery when it is no longer required.
1796	@param box Details of the box which describes the region for this query.
1797	@param mask The query mask to apply to this query; can be used to filter out
1798	certain objects; see SceneQuery for details.
1799	*/
1800	virtual AxisAlignedBoxSceneQuery*
1801	createAABBQuery(const AxisAlignedBox& box, unsigned long mask = 0xFFFFFFFF);
1802	/** Creates a SphereSceneQuery for this scene manager.
1803	@remarks
1804	This method creates a new instance of a query object for this scene manager,
1805	for a spherical region. See SceneQuery and SphereSceneQuery
1806	for full details.
1807	@par
1808	The instance returned from this method must be destroyed by calling
1809	SceneManager::destroyQuery when it is no longer required.
1810	@param sphere Details of the sphere which describes the region for this query.
1811	@param mask The query mask to apply to this query; can be used to filter out
1812	certain objects; see SceneQuery for details.
1813	*/
1814	virtual SphereSceneQuery*
1815	createSphereQuery(const Sphere& sphere, unsigned long mask = 0xFFFFFFFF);
1816	/** Creates a PlaneBoundedVolumeListSceneQuery for this scene manager.
1817	@remarks
1818	This method creates a new instance of a query object for this scene manager,
1819	for a region enclosed by a set of planes (normals pointing inwards).
1820	See SceneQuery and PlaneBoundedVolumeListSceneQuery for full details.
1821	@par
1822	The instance returned from this method must be destroyed by calling
1823	SceneManager::destroyQuery when it is no longer required.
1824	@param volumes Details of the volumes which describe the region for this query.
1825	@param mask The query mask to apply to this query; can be used to filter out
1826	certain objects; see SceneQuery for details.
1827	*/
1828	virtual PlaneBoundedVolumeListSceneQuery*
1829	createPlaneBoundedVolumeQuery(const PlaneBoundedVolumeList& volumes, unsigned long mask = 0xFFFFFFFF);
1830
1831
1832	/** Creates a RaySceneQuery for this scene manager.
1833	@remarks
1834	This method creates a new instance of a query object for this scene manager,
1835	looking for objects which fall along a ray. See SceneQuery and RaySceneQuery
1836	for full details.
1837	@par
1838	The instance returned from this method must be destroyed by calling
1839	SceneManager::destroyQuery when it is no longer required.
1840	@param ray Details of the ray which describes the region for this query.
1841	@param mask The query mask to apply to this query; can be used to filter out
1842	certain objects; see SceneQuery for details.
1843	*/
1844	virtual RaySceneQuery*
1845	createRayQuery(const Ray& ray, unsigned long mask = 0xFFFFFFFF);
1846	//PyramidSceneQuery* createPyramidQuery(const Pyramid& p, unsigned long mask = 0xFFFFFFFF);
1847	/** Creates an IntersectionSceneQuery for this scene manager.
1848	@remarks
1849	This method creates a new instance of a query object for locating
1850	intersecting objects. See SceneQuery and IntersectionSceneQuery
1851	for full details.
1852	@par
1853	The instance returned from this method must be destroyed by calling
1854	SceneManager::destroyQuery when it is no longer required.
1855	@param mask The query mask to apply to this query; can be used to filter out
1856	certain objects; see SceneQuery for details.
1857	*/
1858	virtual IntersectionSceneQuery*
1859	createIntersectionQuery(unsigned long mask = 0xFFFFFFFF);
1860
1861	/** Destroys a scene query of any type. */
1862	virtual void destroyQuery(SceneQuery* query);
1863
1864	typedef MapIterator<CameraList> CameraIterator;
1865	typedef MapIterator<AnimationList> AnimationIterator;
1866
1867	/** Returns a specialised MapIterator over all cameras in the scene. */
1868	CameraIterator getCameraIterator(void) {
1869	return CameraIterator(mCameras.begin(), mCameras.end());
1870	}
1871	/** Returns a specialised MapIterator over all animations in the scene. */
1872	AnimationIterator getAnimationIterator(void) {
1873	return AnimationIterator(mAnimationsList.begin(), mAnimationsList.end());
1874	}
1875	/** Returns a specialised MapIterator over all animation states in the scene. */
1876	AnimationStateIterator getAnimationStateIterator(void) {
1877	return mAnimationStates.getAnimationStateIterator();
1878	}
1879
1880	/** Sets the general shadow technique to be used in this scene.
1881	@remarks
1882	There are multiple ways to generate shadows in a scene, and each has
1883	strengths and weaknesses.
1884	<ul><li>Stencil-based approaches can be used to
1885	draw very long, extreme shadows without loss of precision and the 'additive'
1886	version can correctly show the shadowing of complex effects like bump mapping
1887	because they physically exclude the light from those areas. However, the edges
1888	are very sharp and stencils cannot handle transparency, and they involve a
1889	fair amount of CPU work in order to calculate the shadow volumes, especially
1890	when animated objects are involved.</li>
1891	<li>Texture-based approaches are good for handling transparency (they can, for
1892	example, correctly shadow a mesh which uses alpha to represent holes), and they
1893	require little CPU overhead, and can happily shadow geometry which is deformed
1894	by a vertex program, unlike stencil shadows. However, they have a fixed precision
1895	which can introduce 'jaggies' at long range and have fillrate issues of their own.</li>
1896	</ul>
1897	@par
1898	We support 2 kinds of stencil shadows, and 2 kinds of texture-based shadows, and one
1899	simple decal approach. The 2 stencil approaches differ in the amount of multipass work
1900	that is required - the modulative approach simply 'darkens' areas in shadow after the
1901	main render, which is the least expensive, whilst the additive approach has to perform
1902	a render per light and adds the cumulative effect, whcih is more expensive but more
1903	accurate. The texture based shadows both work in roughly the same way, the only difference is
1904	that the shadowmap approach is slightly more accurate, but requires a more recent
1905	graphics card.
1906	@par
1907	Note that because mixing many shadow techniques can cause problems, only one technique
1908	is supported at once. Also, you should call this method at the start of the
1909	scene setup.
1910	@param technique The shadowing technique to use for the scene.
1911	*/
1912	virtual void setShadowTechnique(ShadowTechnique technique);
1913
1914	/** Gets the current shadow technique. */
1915	virtual ShadowTechnique getShadowTechnique(void) const { return mShadowTechnique; }
1916
1917	/** Enables / disables the rendering of debug information for shadows. */
1918	virtual void setShowDebugShadows(bool debug) { mDebugShadows = debug; }
1919	/** Are debug shadows shown? */
1920	virtual bool getShowDebugShadows(void ) const { return mDebugShadows; }
1921
1922	/** Set the colour used to modulate areas in shadow.
1923	@remarks This is only applicable for shadow techniques which involve
1924	darkening the area in shadow, as opposed to masking out the light.
1925	This colour provided is used as a modulative value to darken the
1926	areas.
1927	*/
1928	virtual void setShadowColour(const ColourValue& colour);
1929	/** Get the colour used to modulate areas in shadow.
1930	@remarks This is only applicable for shadow techniques which involve
1931	darkening the area in shadow, as opposed to masking out the light.
1932	This colour provided is used as a modulative value to darken the
1933	areas.
1934	*/
1935	virtual const ColourValue& getShadowColour(void) const;
1936	/** Sets the distance a shadow volume is extruded for a directional light.
1937	@remarks
1938	Although directional lights are essentially infinite, there are many
1939	reasons to limit the shadow extrusion distance to a finite number,
1940	not least of which is compatibility with older cards (which do not
1941	support infinite positions), and shadow caster elimination.
1942	@par
1943	The default value is 10,000 world units. This does not apply to
1944	point lights or spotlights, since they extrude up to their
1945	attenuation range.
1946	*/
1947	virtual void setShadowDirectionalLightExtrusionDistance(Real dist);
1948	/** Gets the distance a shadow volume is extruded for a directional light.
1949	*/
1950	virtual Real getShadowDirectionalLightExtrusionDistance(void) const;
1951	/** Sets the maximum distance away from the camera that shadows
1952	will be visible.
1953	@remarks
1954	Shadow techniques can be expensive, therefore it is a good idea
1955	to limit them to being rendered close to the camera if possible,
1956	and to skip the expense of rendering shadows for distance objects.
1957	This method allows you to set the distance at which shadows will no
1958	longer be rendered.
1959	@note
1960	Each shadow technique can interpret this subtely differently.
1961	For example, one technique may use this to eliminate casters,
1962	another might use it to attenuate the shadows themselves.
1963	You should tweak this value to suit your chosen shadow technique
1964	and scene setup.
1965	*/
1966	virtual void setShadowFarDistance(Real distance);
1967	/** Gets the maximum distance away from the camera that shadows
1968	will be visible.
1969	*/
1970	virtual Real getShadowFarDistance(void) const
1971	{ return mShadowFarDist; }
1972
1973	/** Sets the maximum size of the index buffer used to render shadow
1974	primitives.
1975	@remarks
1976	This method allows you to tweak the size of the index buffer used
1977	to render shadow primitives (including stencil shadow volumes). The
1978	default size is 51,200 entries, which is 100k of GPU memory, or
1979	enough to render approximately 17,000 triangles. You can reduce this
1980	as long as you do not have any models / world geometry chunks which
1981	could require more than the amount you set.
1982	@par
1983	The maximum number of triangles required to render a single shadow
1984	volume (including light and dark caps when needed) will be 3x the
1985	number of edges on the light silhouette, plus the number of
1986	light-facing triangles. On average, half the
1987	triangles will be facing toward the light, but the number of
1988	triangles in the silhouette entirely depends on the mesh -
1989	angular meshes will have a higher silhouette tris/mesh tris
1990	ratio than a smooth mesh. You can estimate the requirements for
1991	your particular mesh by rendering it alone in a scene with shadows
1992	enabled and a single light - rotate it or the light and make a note
1993	of how high the triangle count goes (remembering to subtract the
1994	mesh triangle count)
1995	@param size The number of indexes; divide this by 3 to determine the
1996	number of triangles.
1997	*/
1998	virtual void setShadowIndexBufferSize(size_t size);
1999	/// Get the size of the shadow index buffer
2000	virtual size_t getShadowIndexBufferSize(void) const
2001	{ return mShadowIndexBufferSize; }
2002	/** Set the size of the texture used for texture-based shadows.
2003	@remarks
2004	The larger the shadow texture, the better the detail on
2005	texture based shadows, but obviously this takes more memory.
2006	The default size is 512. Sizes must be a power of 2.
2007	*/
2008	virtual void setShadowTextureSize(unsigned short size);
2009	/// Get the size of the texture used for texture based shadows
2010	unsigned short getShadowTextureSize(void) const {return mShadowTextureSize; }
2011	/** Set the pixel format of the textures used for texture-based shadows.
2012	@remarks
2013	By default, a colour texture is used (PF_X8R8G8B8) for texture shadows,
2014	but if you want to use more advanced texture shadow types you can
2015	alter this. If you do, you will have to also call
2016	setShadowTextureCasterMaterial and setShadowTextureReceiverMaterial
2017	to provide shader-based materials to use these customised shadow
2018	texture formats.
2019	*/
2020	virtual void setShadowTexturePixelFormat(PixelFormat fmt);
2021	/// Get the format of the textures used for texture based shadows
2022	PixelFormat getShadowTexturePixelFormat(void) const {return mShadowTextureFormat; }
2023	/** Set the number of textures allocated for texture-based shadows.
2024	@remarks
2025	The default number of textures assigned to deal with texture based
2026	shadows is 1; however this means you can only have one light casting
2027	shadows at the same time. You can increase this number in order to
2028	make this more flexible, but be aware of the texture memory it will use.
2029	*/
2030	virtual void setShadowTextureCount(unsigned short count);
2031	/// Get the number of the textures allocated for texture based shadows
2032	unsigned short getShadowTextureCount(void) const {return mShadowTextureCount; }
2033	/** Sets the size and count of textures used in texture-based shadows.
2034	@remarks
2035	@see setShadowTextureSize and setShadowTextureCount for details, this
2036	method just allows you to change both at once, which can save on
2037	reallocation if the textures have already been created.
2038	*/
2039	virtual void setShadowTextureSettings(unsigned short size, unsigned short count,
2040	PixelFormat fmt = PF_X8R8G8B8);
2041	/** Sets the proportional distance which a texture shadow which is generated from a
2042	directional light will be offset into the camera view to make best use of texture space.
2043	@remarks
2044	When generating a shadow texture from a directional light, an approximation is used
2045	since it is not possible to render the entire scene to one texture.
2046	The texture is projected onto an area centred on the camera, and is
2047	the shadow far distance * 2 in length (it is square). This wastes
2048	a lot of texture space outside the frustum though, so this offset allows
2049	you to move the texture in front of the camera more. However, be aware
2050	that this can cause a little shadow 'jittering' during rotation, and
2051	that if you move it too far then you'll start to get artefacts close
2052	to the camera. The value is represented as a proportion of the shadow
2053	far distance, and the default is 0.6.
2054	*/
2055	virtual void setShadowDirLightTextureOffset(Real offset) { mShadowTextureOffset = offset;}
2056	/** Sets the proportional distance at which texture shadows begin to fade out.
2057	@remarks
2058	To hide the edges where texture shadows end (in directional lights)
2059	Ogre will fade out the shadow in the distance. This value is a proportional
2060	distance of the entire shadow visibility distance at which the shadow
2061	begins to fade out. The default is 0.7
2062	*/
2063	virtual void setShadowTextureFadeStart(Real fadeStart)
2064	{ mShadowTextureFadeStart = fadeStart; }
2065	/** Sets the proportional distance at which texture shadows finish to fading out.
2066	@remarks
2067	To hide the edges where texture shadows end (in directional lights)
2068	Ogre will fade out the shadow in the distance. This value is a proportional
2069	distance of the entire shadow visibility distance at which the shadow
2070	is completely invisible. The default is 0.9.
2071	*/
2072	virtual void setShadowTextureFadeEnd(Real fadeEnd)
2073	{ mShadowTextureFadeEnd = fadeEnd; }
2074
2075	/** Sets whether or not texture shadows should attempt to self-shadow.
2076	@remarks
2077	The default implementation of texture shadows uses a fixed-function
2078	colour texture projection approach for maximum compatibility, and
2079	as such cannot support self-shadowing. However, if you decide to
2080	implement a more complex shadowing technique using the
2081	setShadowTextureCasterMaterial and setShadowTextureReceiverMaterial
2082	there is a possibility you may be able to support
2083	self-shadowing (e.g by implementing a shader-based shadow map). In
2084	this case you might want to enable this option.
2085	@param selfShadow Whether to attempt self-shadowing with texture shadows
2086	*/
2087	virtual void setShadowTextureSelfShadow(bool selfShadow);
2088
2089	/// Gets whether or not texture shadows attempt to self-shadow.
2090	virtual bool getShadowTextureSelfShadow(void) const
2091	{ return mShadowTextureSelfShadow; }
2092	/** Sets the default material to use for rendering shadow casters.
2093	@remarks
2094	By default shadow casters are rendered into the shadow texture using
2095	an automatically generated fixed-function pass. This allows basic
2096	projective texture shadows, but it's possible to use more advanced
2097	shadow techniques by overriding the caster and receiver materials, for
2098	example providing vertex and fragment programs to implement shadow
2099	maps.
2100	@par
2101	You can rely on the ambient light in the scene being set to the
2102	requested texture shadow colour, if that's useful.
2103	@note
2104	Individual objects may also override the vertex program in
2105	your default material if their materials include
2106	shadow_caster_vertex_program_ref shadow_receiver_vertex_program_ref
2107	entries, so if you use both make sure they are compatible.
2108	@note
2109	Only a single pass is allowed in your material, although multiple
2110	techniques may be used for hardware fallback.
2111	*/
2112	virtual void setShadowTextureCasterMaterial(const String& name);
2113	/** Sets the default material to use for rendering shadow receivers.
2114	@remarks
2115	By default shadow receivers are rendered as a post-pass using basic
2116	modulation. This allows basic projective texture shadows, but it's
2117	possible to use more advanced shadow techniques by overriding the
2118	caster and receiver materials, for example providing vertex and
2119	fragment programs to implement shadow maps.
2120	@par
2121	You can rely on texture unit 0 containing the shadow texture, and
2122	for the unit to be set to use projective texturing from the light
2123	(only useful if you're using fixed-function, which is unlikely;
2124	otherwise you should rely on the texture_viewproj_matrix auto binding)
2125	@note
2126	Individual objects may also override the vertex program in
2127	your default material if their materials include
2128	shadow_caster_vertex_program_ref shadow_receiver_vertex_program_ref
2129	entries, so if you use both make sure they are compatible.
2130	@note
2131	Only a single pass is allowed in your material, although multiple
2132	techniques may be used for hardware fallback.
2133	*/
2134	virtual void setShadowTextureReceiverMaterial(const String& name);
2135
2136	/** Sets whether we should use an inifinite camera far plane
2137	when rendering stencil shadows.
2138	@remarks
2139	Stencil shadow coherency is very reliant on the shadow volume
2140	not being clipped by the far plane. If this clipping happens, you
2141	get a kind of 'negative' shadow effect. The best way to achieve
2142	coherency is to move the far plane of the camera out to infinity,
2143	thus preventing the far plane from clipping the shadow volumes.
2144	When combined with vertex program extrusion of the volume to
2145	infinity, which Ogre does when available, this results in very
2146	robust shadow volumes. For this reason, when you enable stencil
2147	shadows, Ogre automatically changes your camera settings to
2148	project to infinity if the card supports it. You can disable this
2149	behaviour if you like by calling this method; although you can
2150	never enable infinite projection if the card does not support it.
2151	@par
2152	If you disable infinite projection, or it is not available,
2153	you need to be far more careful with your light attenuation /
2154	directional light extrusion distances to avoid clipping artefacts
2155	at the far plane.
2156	@note
2157	Recent cards will generally support infinite far plane projection.
2158	However, we have found some cases where they do not, especially
2159	on Direct3D. There is no standard capability we can check to
2160	validate this, so we use some heuristics based on experience:
2161	<UL>
2162	<LI>OpenGL always seems to support it no matter what the card</LI>
2163	<LI>Direct3D on non-vertex program capable systems (including
2164	vertex program capable cards on Direct3D7) does not
2165	support it</LI>
2166	<LI>Direct3D on GeForce3 and GeForce4 Ti does not seem to support
2167	infinite projection<LI>
2168	</UL>
2169	Therefore in the RenderSystem implementation, we may veto the use
2170	of an infinite far plane based on these heuristics.
2171	*/
2172	virtual void setShadowUseInfiniteFarPlane(bool enable) {
2173	mShadowUseInfiniteFarPlane = enable; }
2174
2175	/** Is there a stencil shadow based shadowing technique in use? */
2176	virtual bool isShadowTechniqueStencilBased(void) const
2177	{ return (mShadowTechnique & SHADOWDETAILTYPE_STENCIL) != 0; }
2178	/** Is there a texture shadow based shadowing technique in use? */
2179	virtual bool isShadowTechniqueTextureBased(void) const
2180	{ return (mShadowTechnique & SHADOWDETAILTYPE_TEXTURE) != 0; }
2181	/** Is there a modulative shadowing technique in use? */
2182	virtual bool isShadowTechniqueModulative(void) const
2183	{ return (mShadowTechnique & SHADOWDETAILTYPE_MODULATIVE) != 0; }
2184	/** Is there an additive shadowing technique in use? */
2185	virtual bool isShadowTechniqueAdditive(void) const
2186	{ return (mShadowTechnique & SHADOWDETAILTYPE_ADDITIVE) != 0; }
2187	/** Is there any shadowing technique in use? */
2188	virtual bool isShadowTechniqueInUse(void) const
2189	{ return mShadowTechnique != SHADOWTYPE_NONE; }
2190
2191	/** Add a shadow listener which will get called back on shadow
2192	events.
2193	*/
2194	virtual void addShadowListener(ShadowListener* s);
2195	/** Remove a shadow listener
2196	*/
2197	virtual void removeShadowListener(ShadowListener* s);
2198
2199	/** Creates a StaticGeometry instance suitable for use with this
2200	SceneManager.
2201	@remarks
2202	StaticGeometry is a way of batching up geometry into a more
2203	efficient form at the expense of being able to move it. Please
2204	read the StaticGeometry class documentation for full information.
2205	@param name The name to give the new object
2206	@returns The new StaticGeometry instance
2207	*/
2208	virtual StaticGeometry* createStaticGeometry(const String& name);
2209	/** Retrieve a previously created StaticGeometry instance. */
2210	virtual StaticGeometry* getStaticGeometry(const String& name) const;
2211	/** Remove & destroy a StaticGeometry instance. */
2212	virtual void destroyStaticGeometry(StaticGeometry* geom);
2213	/** Remove & destroy a StaticGeometry instance. */
2214	virtual void destroyStaticGeometry(const String& name);
2215	/** Remove & destroy all StaticGeometry instances. */
2216	virtual void destroyAllStaticGeometry(void);
2217
2218
2219	/** Create a movable object of the type specified.
2220	@remarks
2221	This is the generalised form of MovableObject creation where you can
2222	create a MovableObject of any specialised type generically, including
2223	any new types registered using plugins.
2224	@param name The name to give the object. Must be unique within type.
2225	@param typeName The type of object to create
2226	@param params Optional name/value pair list to give extra parameters to
2227	the created object.
2228	*/
2229	virtual MovableObject* createMovableObject(const String& name,
2230	const String& typeName, const NameValuePairList* params = 0);
2231	/** Destroys a MovableObject with the name specified, of the type specified.
2232	@remarks
2233	The MovableObject will automatically detach itself from any nodes
2234	on destruction.
2235	*/
2236	virtual void destroyMovableObject(const String& name, const String& typeName);
2237	/** Destroys a MovableObject.
2238	@remarks
2239	The MovableObject will automatically detach itself from any nodes
2240	on destruction.
2241	*/
2242	virtual void destroyMovableObject(MovableObject* m);
2243	/** Destroy all MovableObjects of a given type. */
2244	virtual void destroyAllMovableObjectsByType(const String& typeName);
2245	/** Destroy all MovableObjects. */
2246	virtual void destroyAllMovableObjects(void);
2247	/** Get a reference to a previously created MovableObject. */
2248	virtual MovableObject* getMovableObject(const String& name, const String& typeName);
2249	typedef MapIterator<MovableObjectMap> MovableObjectIterator;
2250	/** Get an iterator over all MovableObect instances of a given type. */
2251	virtual MovableObjectIterator getMovableObjectIterator(const String& typeName);
2252	/** Inject a MovableObject instance created externally.
2253	@remarks
2254	This method 'injects' a MovableObject instance created externally into
2255	the MovableObject instance registry held in the SceneManager. You
2256	might want to use this if you have a MovableObject which you don't
2257	want to register a factory for; for example a MovableObject which
2258	cannot be generally constructed by clients.
2259	@note
2260	It is important that the MovableObject has a unique name for the type,
2261	and that its getMovableType() method returns a proper type name.
2262	*/
2263	virtual void injectMovableObject(MovableObject* m);
2264	/** Extract a previously injected MovableObject.
2265	@remarks
2266	Essentially this does the same as destroyMovableObject, but only
2267	removes the instance from the internal lists, it does not attempt
2268	to destroy it.
2269	*/
2270	virtual void extractMovableObject(const String& name, const String& typeName);
2271	/** Extract a previously injected MovableObject.
2272	@remarks
2273	Essentially this does the same as destroyMovableObject, but only
2274	removes the instance from the internal lists, it does not attempt
2275	to destroy it.
2276	*/
2277	virtual void extractMovableObject(MovableObject* m);
2278	/** Extract all injected MovableObjects of a given type.
2279	@remarks
2280	Essentially this does the same as destroyAllMovableObjectsByType,
2281	but only removes the instances from the internal lists, it does not
2282	attempt to destroy them.
2283	*/
2284	virtual void extractAllMovableObjectsByType(const String& typeName);
2285
2286	/** Sets a mask which is bitwise 'and'ed with objects own visibility masks
2287	to determine if the object is visible.
2288	*/
2289	virtual void setVisibilityMask(uint32 vmask) { mVisibilityMask = vmask; }
2290
2291	/** Gets a mask which is bitwise 'and'ed with objects own visibility masks
2292	to determine if the object is visible.
2293	*/
2294	virtual uint32 getVisibilityMask(void) { return mVisibilityMask; }
2295
2296	/** Sets whether the SceneManager should search for visible objects, or
2297	whether they are being manually handled.
2298	@remarks
2299	This is an advanced function, you should not use this unless you know
2300	what you are doing.
2301	*/
2302	virtual void setFindVisibleObjects(bool find) { mFindVisibleObjects = find; }
2303
2304	/** Gets whether the SceneManager should search for visible objects, or
2305	whether they are being manually handled.
2306	*/
2307	virtual bool getFindVisibleObjects(void) { return mFindVisibleObjects; }
2308
2309	/** Render something as if it came from the current queue.
2310	@param pass Material pass to use for setting up this quad.
2311	@param rend Renderable to render
2312	*/
2313	virtual void _injectRenderWithPass(Pass pass, Renderable rend);
2314
2315	/** Indicates to the SceneManager whether it should suppress changing
2316	the RenderSystem states when rendering objects.
2317	@remarks
2318	This method allows you to tell the SceneManager not to change any
2319	RenderSystem state until you tell it to. This method is only
2320	intended for advanced use, don't use it if you're unsure of the
2321	effect. The only RenderSystems calls made are to set the world
2322	matrix for each object (note - view an projection matrices are NOT
2323	SET - they are under your control) and to render the object; it is up to
2324	the caller to do everything else, including enabling any vertex /
2325	fragment programs and updating their parameter state, and binding
2326	parameters to the RenderSystem.
2327	@note
2328	Calling this implicitly disables shadow processing since no shadows
2329	can be rendered without changing state.
2330	@param suppress If true, no RenderSystem state changes will be issued
2331	until this method is called again with a parameter of false.
2332	*/
2333	virtual void _suppressRenderStateChanges(bool suppress);
2334
2335	/** Are render state changes suppressed?
2336	@see _suppressRenderStateChanges
2337	*/
2338	virtual bool _areRenderStateChangesSuppressed(void) const
2339	{ return mSuppressRenderStateChanges; }
2340
2341	/** Internal method for setting up the renderstate for a rendering pass.
2342	@param pass The Pass details to set.
2343	@param evenIfSuppressed Sets the pass details even if render state
2344	changes are suppressed; if you are using this to manually set state
2345	when render state changes are suppressed, you should set this to
2346	true.
2347	@returns
2348	A Pass object that was used instead of the one passed in, can
2349	happen when rendering shadow passes
2350	*/
2351	virtual const Pass* _setPass(const Pass* pass, bool evenIfSuppressed = false);
2352
2353
2354	/** Indicates to the SceneManager whether it should suppress the
2355	active shadow rendering technique until told otherwise.
2356	@remarks
2357	This is a temporary alternative to setShadowTechnique to suppress
2358	the rendering of shadows and forcing all processing down the
2359	standard rendering path. This is intended for internal use only.
2360	@param suppress If true, no shadow rendering will occur until this
2361	method is called again with a parameter of false.
2362	*/
2363	virtual void _suppressShadows(bool suppress);
2364
2365	/** Are shadows suppressed?
2366	@see _suppressShadows
2367	*/
2368	virtual bool _areShadowsSuppressed(void) const
2369	{ return mSuppressShadows; }
2370
2371	/** Render the objects in a given queue group
2372	@remarks You should only call this from a RenderQueueInvocation implementation
2373	*/
2374	virtual void _renderQueueGroupObjects(RenderQueueGroup* group,
2375	QueuedRenderableCollection::OrganisationMode om);
2376
2377	/** Get the rendersystem subclass to which the output of this Scene Manager
2378	gets sent
2379	*/
2380	RenderSystem *getDestinationRenderSystem();
2381	};
2382
2383	/** Default implementation of IntersectionSceneQuery. */
2384	class _OgreExport DefaultIntersectionSceneQuery :
2385	public IntersectionSceneQuery
2386	{
2387	public:
2388	DefaultIntersectionSceneQuery(SceneManager* creator);
2389	~DefaultIntersectionSceneQuery();
2390
2391	/** See IntersectionSceneQuery. */
2392	void execute(IntersectionSceneQueryListener* listener);
2393	};
2394
2395	/** Default implementation of RaySceneQuery. */
2396	class _OgreExport DefaultRaySceneQuery : public RaySceneQuery
2397	{
2398	public:
2399	DefaultRaySceneQuery(SceneManager* creator);
2400	~DefaultRaySceneQuery();
2401
2402	/** See RayScenQuery. */
2403	void execute(RaySceneQueryListener* listener);
2404	};
2405	/** Default implementation of SphereSceneQuery. */
2406	class _OgreExport DefaultSphereSceneQuery : public SphereSceneQuery
2407	{
2408	public:
2409	DefaultSphereSceneQuery(SceneManager* creator);
2410	~DefaultSphereSceneQuery();
2411
2412	/** See SceneQuery. */
2413	void execute(SceneQueryListener* listener);
2414	};
2415	/** Default implementation of PlaneBoundedVolumeListSceneQuery. */
2416	class _OgreExport DefaultPlaneBoundedVolumeListSceneQuery : public PlaneBoundedVolumeListSceneQuery
2417	{
2418	public:
2419	DefaultPlaneBoundedVolumeListSceneQuery(SceneManager* creator);
2420	~DefaultPlaneBoundedVolumeListSceneQuery();
2421
2422	/** See SceneQuery. */
2423	void execute(SceneQueryListener* listener);
2424	};
2425	/** Default implementation of AxisAlignedBoxSceneQuery. */
2426	class _OgreExport DefaultAxisAlignedBoxSceneQuery : public AxisAlignedBoxSceneQuery
2427	{
2428	public:
2429	DefaultAxisAlignedBoxSceneQuery(SceneManager* creator);
2430	~DefaultAxisAlignedBoxSceneQuery();
2431
2432	/** See RayScenQuery. */
2433	void execute(SceneQueryListener* listener);
2434	};
2435
2436
2437	/// Bitmask containing scene types
2438	typedef uint16 SceneTypeMask;
2439
2440	/** Classification of a scene to allow a decision of what type of
2441	SceenManager to provide back to the application.
2442	*/
2443	enum SceneType
2444	{
2445	ST_GENERIC = 1,
2446	ST_EXTERIOR_CLOSE = 2,
2447	ST_EXTERIOR_FAR = 4,
2448	ST_EXTERIOR_REAL_FAR = 8,
2449	ST_INTERIOR = 16
2450	};
2451
2452	/** Structure containing information about a scene manager. */
2453	struct SceneManagerMetaData
2454	{
2455	/// A globally unique string identifying the scene manager type
2456	String typeName;
2457	/// A text description of the scene manager
2458	String description;
2459	/// A mask describing which sorts of scenes this manager can handle
2460	SceneTypeMask sceneTypeMask;
2461	/// Flag indicating whether world geometry is supported
2462	bool worldGeometrySupported;
2463	};
2464
2465
2466
2467	/** Class which will create instances of a given SceneManager. */
2468	class _OgreExport SceneManagerFactory
2469	{
2470	protected:
2471	mutable SceneManagerMetaData mMetaData;
2472	mutable bool mMetaDataInit;
2473	/// Internal method to initialise the metadata, must be implemented
2474	virtual void initMetaData(void) const = 0;
2475	public:
2476	SceneManagerFactory() : mMetaDataInit(true) {}
2477	virtual ~SceneManagerFactory() {}
2478	/** Get information about the SceneManager type created by this factory. */
2479	virtual const SceneManagerMetaData& getMetaData(void) const
2480	{
2481	if (mMetaDataInit)
2482	{
2483	initMetaData();
2484	mMetaDataInit = false;
2485	}
2486	return mMetaData;
2487	}
2488	/** Create a new instance of a SceneManager.
2489	@remarks
2490	Don't call directly, use SceneManagerEnumerator::createSceneManager.
2491	*/
2492	virtual SceneManager* createInstance(const String& instanceName) = 0;
2493	/** Destroy an instance of a SceneManager. */
2494	virtual void destroyInstance(SceneManager* instance) = 0;
2495
2496	};
2497
2498
2499
2500	} // Namespace
2501
2502
2503
2504	#endif

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