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OgreSceneManager.h @ 657

Revision 657, 95.8 KB checked in by mattausch, 19 years ago (diff)
added ogre dependencies and patched ogre sources

Rev	Line
[74]	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 "OgreRenderQueue.h"
	38	#include "OgreAnimationState.h"
	39	#include "OgreSceneQuery.h"
	40	#include "OgreAutoParamDataSource.h"
	41	#include "OgreAnimationState.h"
	42	#include "OgreRenderQueue.h"
	43	#include "OgreRenderQueueSortingGrouping.h"
	44	#include "OgreRectangle2D.h"
	45
	46	namespace Ogre {
	47
	48	/** Structure for holding a position & orientation pair. */
	49	struct ViewPoint
	50	{
	51	Vector3 position;
	52	Quaternion orientation;
	53	};
	54
	55	// Forward declarations
	56	class DefaultIntersectionSceneQuery;
	57	class DefaultRaySceneQuery;
	58	class DefaultSphereSceneQuery;
	59	class DefaultAxisAlignedBoxSceneQuery;
	60
	61	/** Manages the rendering of a 'scene' i.e. a collection of primitives.
	62	@remarks
	63	This class defines the basic behaviour of the 'Scene Manager' family. These classes will
	64	organise the objects in the scene and send them to the rendering system, a subclass of
	65	RenderSystem. This basic superclass does no sorting, culling or organising of any sort.
	66	@par
	67	Subclasses may use various techniques to organise the scene depending on how they are
	68	designed (e.g. BSPs, octrees etc). As with other classes, methods preceded with '_' are
	69	designed to be called by other classes in the Ogre system, not by user applications,
	70	although this is not forbidden.
	71	@author
	72	Steve Streeting
	73	@version
	74	1.0
	75	*/
	76	class _OgreExport SceneManager
	77	{
	78	friend class DefaultIntersectionSceneQuery;
	79	friend class DefaultRaySceneQuery;
	80	friend class DefaultSphereSceneQuery;
	81	friend class DefaultAxisAlignedBoxSceneQuery;
	82	friend class DefaultPlaneBoundedVolumeListSceneQuery;
	83	public:
	84	/// Query mask which will be used for world geometry @see SceneQuery
	85	static unsigned long WORLD_GEOMETRY_QUERY_MASK;
	86	/** Comparator for material map, for sorting materials into render order (e.g. transparent last).
	87	*/
	88	struct materialLess
	89	{
	90	_OgreExport bool operator()(const Material* x, const Material* y) const;
	91	};
	92	/// Comparator for sorting lights relative to a point
	93	struct lightLess
	94	{
	95	_OgreExport bool operator()(const Light* a, const Light* b) const;
	96	};
	97
	98	/// Describes the stage of rendering when performing complex illumination
	99	enum IlluminationRenderStage
	100	{
	101	/// No special illumination stage
	102	IRS_NONE,
	103	/// Ambient stage, when background light is added
	104	IRS_AMBIENT,
	105	/// Diffuse / specular stage, when individual light contributions are added
	106	IRS_PER_LIGHT,
	107	/// Decal stage, when texture detail is added to the lit base
	108	IRS_DECAL,
	109	/// Render to texture stage, used for texture based shadows
	110	IRS_RENDER_TO_TEXTURE,
	111	/// Modulative render from shadow texture stage
	112	IRS_RENDER_MODULATIVE_PASS
	113	};
	114
	115	/** Enumeration of the possible modes allowed for processing the special case
	116	render queue list.
	117	@see SceneManager::setSpecialCaseRenderQueueMode
	118	*/
	119	enum SpecialCaseRenderQueueMode
	120	{
	121	/// Render only the queues in the special case list
	122	SCRQM_INCLUDE,
	123	/// Render all except the queues in the special case list
	124	SCRQM_EXCLUDE
	125	};
	126	#ifdef GTP_VISIBILITY_MODIFIED_OGRE
	127	/** added by matt: Render content of current scene node.
	128	@param node scene node to be rendered
	129	@param cam current camera
[139]	130	@param leavePassesInQueue list of passes which are left in queue
[74]	131	*/
[139]	132	void _renderSceneNode(Camera cam, SceneNode node, const int leavePassesInQueue = 0);
[115]	133	/** deletes all processed queues
[139]	134	@param leavePassesInQueue pass list which is not deleted from queue
	135	@remark used to clear render queues before rendering scene node
[74]	136	*/
[139]	137	void _deleteRenderedQueueGroups(int leavePassesInQueue = 0);
[316]	138	/** Wrapper for useRenderableViewProjMde with is an
	139	Internal method used by _renderVisibleObjects to deal with renderables
[74]	140	which override the camera's own view / projection materices.
	141	*/
[316]	142	void useRenderableViewProjModeWrapper(Renderable* pRend); // HACK
	143	/** HACK: A public wrapper method for setting up the renderstate for a rendering pass.
[74]	144	@param
	145	pass The Pass details to set.
	146	@returns
	147	A Pass object that was used instead of the one passed in, can
	148	happen when rendering shadow passes
	149	@remark made public by matt
	150	*/
[316]	151	virtual Pass* setPassWrapper(Pass* pass);
[131]	152
	153	/** Renders an Ogre Entity.
	154	*/
	155	//void renderEntity(Entity *ent);
	156
	157	/** Renders an Ogre MovableObject.
[159]	158	@param mov the movable object to be rendered
	159	@param leavePassesInQueue flag determining the passes which are left
	160	in render queue after rendering
[131]	161	*/
[139]	162	void _renderMovableObject(MovableObject *mov, const int leavePassesInQueue);
[131]	163
[183]	164	/** Renders a single renderable using pass 0 of the renderable.
	165	*/
	166	void _renderSingleRenderable(Renderable *rend);
	167
[159]	168	/** Tells the scene manager that the frame ends (i.e.,
	169	one frame in the main loop.
	170	*/
	171	virtual void endFrame() {};
[74]	172	#endif // GTP_VISIBILITY_MODIFIED_OGRE
	173
	174	protected:
	175
	176	/// Queue of objects for rendering
	177	RenderQueue* mRenderQueue;
	178
	179	/// Current ambient light, cached for RenderSystem
	180	ColourValue mAmbientLight;
	181
	182	/// The rendering system to send the scene to
	183	RenderSystem *mDestRenderSystem;
	184
	185	typedef std::map<String, Camera* > CameraList;
	186
	187	/** Central list of cameras - for easy memory management and lookup.
	188	*/
	189	CameraList mCameras;
	190
	191	typedef std::map<String, Light* > SceneLightList;
	192
	193	/** Central list of lights - for easy memory management and lookup.
	194	*/
	195	SceneLightList mLights;
	196
	197
	198	typedef std::map<String, Entity* > EntityList;
	199
	200	/** Central list of entities - for easy memory management and lookup.
	201	*/
	202	EntityList mEntities;
	203
	204	typedef std::map<String, BillboardSet* > BillboardSetList;
	205
	206	/** Central list of billboard sets - for easy memory management and lookup.
	207	*/
	208	BillboardSetList mBillboardSets;
	209
	210	typedef std::map<String, StaticGeometry* > StaticGeometryList;
	211	StaticGeometryList mStaticGeometryList;
	212
	213	typedef std::map<String, SceneNode*> SceneNodeList;
	214
	215	/** Central list of SceneNodes - for easy memory management.
	216	@note
	217	Note that this list is used only for memory management; the structure of the scene
	218	is held using the hierarchy of SceneNodes starting with the root node. However you
	219	can look up nodes this way.
	220	*/
	221	SceneNodeList mSceneNodes;
	222
	223	/// Camera in progress
	224	Camera* mCameraInProgress;
	225	/// Current Viewport
	226	Viewport* mCurrentViewport;
	227
	228	/// Root scene node
	229	SceneNode* mSceneRoot;
	230
	231	/// Autotracking scene nodes
	232	typedef std::set<SceneNode*> AutoTrackingSceneNodes;
	233	AutoTrackingSceneNodes mAutoTrackingSceneNodes;
	234
	235	// Sky params
	236	// Sky plane
	237	Entity* mSkyPlaneEntity;
	238	Entity* mSkyDomeEntity[5];
	239	Entity* mSkyBoxEntity[6];
	240
	241	SceneNode* mSkyPlaneNode;
	242	SceneNode* mSkyDomeNode;
	243	SceneNode* mSkyBoxNode;
	244
	245	bool mSkyPlaneEnabled;
	246	bool mSkyPlaneDrawFirst;
	247	Plane mSkyPlane;
	248	// Sky box
	249	bool mSkyBoxEnabled;
	250	bool mSkyBoxDrawFirst;
	251	Quaternion mSkyBoxOrientation;
	252	// Sky dome
	253	bool mSkyDomeEnabled;
	254	bool mSkyDomeDrawFirst;
	255	Quaternion mSkyDomeOrientation;
	256	// Fog
	257	FogMode mFogMode;
	258	ColourValue mFogColour;
	259	Real mFogStart;
	260	Real mFogEnd;
	261	Real mFogDensity;
	262
	263	typedef std::set<RenderQueueGroupID> SpecialCaseRenderQueueList;
	264	SpecialCaseRenderQueueList mSpecialCaseQueueList;
	265	SpecialCaseRenderQueueMode mSpecialCaseQueueMode;
	266	RenderQueueGroupID mWorldGeometryRenderQueue;
	267
	268	/** Internal method for initialising the render queue.
	269	@remarks
	270	Subclasses can use this to install their own RenderQueue implementation.
	271	*/
	272	virtual void initRenderQueue(void);
	273	/** Internal method for setting up the renderstate for a rendering pass.
	274	@param
	275	pass The Pass details to set.
	276	@returns
	277	A Pass object that was used instead of the one passed in, can
	278	happen when rendering shadow passes
	279	*/
	280	virtual Pass* setPass(Pass* pass);
	281	/// A pass designed to let us render shadow colour on white for texture shadows
	282	Pass* mShadowCasterPlainBlackPass;
	283	/// A pass designed to let us render shadow receivers for texture shadows
	284	Pass* mShadowReceiverPass;
	285	/** Internal method for turning a regular pass into a shadow caster pass.
	286	@remarks
	287	This is only used for texture shadows, basically we're trying to
	288	ensure that objects are rendered solid black.
	289	This method will usually return the standard solid black pass for
	290	all fixed function passes, but will merge in a vertex program
	291	and fudge the AutpoParamDataSource to set black lighting for
	292	passes with vertex programs.
	293	*/
	294	Pass* deriveShadowCasterPass(Pass* pass);
	295	/** Internal method for turning a regular pass into a shadow receiver pass.
	296	@remarks
	297	This is only used for texture shadows, basically we're trying to
	298	ensure that objects are rendered with a projective texture.
	299	This method will usually return a standard single-texture pass for
	300	all fixed function passes, but will merge in a vertex program
	301	for passes with vertex programs.
	302	*/
	303	Pass* deriveShadowReceiverPass(Pass* pass);
	304
	305	/** Internal method to validate whether a Pass should be allowed to render.
	306	@remarks
	307	Called just before a pass is about to be used for rendering a group to
	308	allow the SceneManager to omit it if required. A return value of false
	309	skips this pass.
	310	*/
	311	bool validatePassForRendering(Pass* pass);
	312
	313	/** Internal method to validate whether a Renderable should be allowed to render.
	314	@remarks
	315	Called just before a pass is about to be used for rendering a Renderable to
	316	allow the SceneManager to omit it if required. A return value of false
	317	skips it.
	318	*/
	319	bool validateRenderableForRendering(Pass* pass, Renderable* rend);
	320
	321	enum BoxPlane
	322	{
	323	BP_FRONT = 0,
	324	BP_BACK = 1,
	325	BP_LEFT = 2,
	326	BP_RIGHT = 3,
	327	BP_UP = 4,
	328	BP_DOWN = 5
	329	};
	330
	331	/* Internal utility method for creating the planes of a skybox.
	332	*/
	333	MeshPtr createSkyboxPlane(
	334	BoxPlane bp,
	335	Real distance,
	336	const Quaternion& orientation,
	337	const String& groupName);
	338
	339	/* Internal utility method for creating the planes of a skydome.
	340	*/
	341	MeshPtr createSkydomePlane(
	342	BoxPlane bp,
	343	Real curvature, Real tiling, Real distance,
	344	const Quaternion& orientation,
	345	int xsegments, int ysegments, int ySegmentsToKeep,
	346	const String& groupName);
	347
	348	// Flag indicating whether SceneNodes will be rendered as a set of 3 axes
	349	bool mDisplayNodes;
	350
	351	/// Storage of animations, lookup by name
	352	typedef std::map<String, Animation*> AnimationList;
	353	AnimationList mAnimationsList;
	354	AnimationStateSet mAnimationStates;
[316]	355
[74]	356	/** Internal method used by _renderVisibleObjects to deal with renderables
	357	which override the camera's own view / projection materices. */
	358	void useRenderableViewProjMode(Renderable* pRend);
[316]	359
[74]	360	/// Controller flag for determining if we need to set view/proj matrices
	361	bool mCamChanged;
	362
	363	typedef std::vector<RenderQueueListener*> RenderQueueListenerList;
	364	RenderQueueListenerList mRenderQueueListeners;
	365
	366	/// Internal method for firing the queue start event, returns true if queue is to be skipped
	367	bool fireRenderQueueStarted(RenderQueueGroupID id);
	368	/// Internal method for firing the queue end event, returns true if queue is to be repeated
	369	bool fireRenderQueueEnded(RenderQueueGroupID id);
	370
	371	/** Internal method for setting the destination viewport for the next render. */
	372	virtual void setViewport(Viewport *vp);
	373
	374	/** Flag that indicates if all of the scene node's bounding boxes should be shown as a wireframe. */
	375	bool mShowBoundingBoxes;
	376
	377	/** Internal utility method for rendering a single object.
	378	@remarks
	379	Assumes that the pass has already been set up.
	380	@param rend The renderable to issue to the pipeline
	381	@param pass The pass which is being used
	382	@param doLightIteration If true, this method will issue the renderable to
	383	the pipeline possibly multiple times, if the pass indicates it should be
	384	done once per light
	385	@param manualLightList Only applicable if doLightIteration is false, this
	386	method allows you to pass in a previously determined set of lights
	387	which will be used for a single render of this object.
	388	*/
	389	virtual void renderSingleObject(Renderable* rend, Pass* pass, bool doLightIteration,
	390	const LightList* manualLightList = 0);
	391
	392	/// Utility class for calculating automatic parameters for gpu programs
	393	AutoParamDataSource mAutoParamDataSource;
	394
	395	ShadowTechnique mShadowTechnique;
	396	bool mDebugShadows;
	397	ColourValue mShadowColour;
	398	Pass* mShadowDebugPass;
	399	Pass* mShadowStencilPass;
	400	Pass* mShadowModulativePass;
	401	bool mShadowMaterialInitDone;
	402	LightList mLightsAffectingFrustum;
	403	HardwareIndexBufferSharedPtr mShadowIndexBuffer;
	404	size_t mShadowIndexBufferSize;
	405	Rectangle2D* mFullScreenQuad;
	406	Real mShadowDirLightExtrudeDist;
	407	IlluminationRenderStage mIlluminationStage;
	408	unsigned short mShadowTextureSize;
	409	unsigned short mShadowTextureCount;
	410	PixelFormat mShadowTextureFormat;
	411	typedef std::vector<RenderTexture*> ShadowTextureList;
	412	ShadowTextureList mShadowTextures;
	413	RenderTexture* mCurrentShadowTexture;
	414	bool mShadowUseInfiniteFarPlane;
	415	/** Internal method for locating a list of lights which could be affecting the frustum.
	416	@remarks
	417	Custom scene managers are encouraged to override this method to make use of their
	418	scene partitioning scheme to more efficiently locate lights, and to eliminate lights
	419	which may be occluded by word geometry.
	420	*/
	421	virtual void findLightsAffectingFrustum(const Camera* camera);
	422	/// Internal method for setting up materials for shadows
	423	virtual void initShadowVolumeMaterials(void);
	424	/// Internal method for creating shadow textures (texture-based shadows)
	425	virtual void createShadowTextures(unsigned short size, unsigned short count,
	426	PixelFormat fmt);
[657]	427	/// Internal method for destroying shadow textures (texture-based shadows)
	428	virtual void destroyShadowTextures(void);
[74]	429	/// Internal method for preparing shadow textures ready for use in a regular render
	430	virtual void prepareShadowTextures(Camera* cam, Viewport* vp);
	431
	432	/** Internal method for rendering all the objects for a given light into the
	433	stencil buffer.
	434	@param light The light source
	435	@param cam The camera being viewed from
	436	*/
	437	virtual void renderShadowVolumesToStencil(const Light* light, const Camera* cam);
	438	/** Internal utility method for setting stencil state for rendering shadow volumes.
	439	@param secondpass Is this the second pass?
	440	@param zfail Should we be using the zfail method?
	441	@param twosided Should we use a 2-sided stencil?
	442	*/
	443	virtual void setShadowVolumeStencilState(bool secondpass, bool zfail, bool twosided);
	444	/** Render a set of shadow renderables. */
	445	void renderShadowVolumeObjects(ShadowCaster::ShadowRenderableListIterator iShadowRenderables,
	446	Pass* pass, const LightList *manualLightList, unsigned long flags,
	447	bool secondpass, bool zfail, bool twosided);
	448	typedef std::vector<ShadowCaster*> ShadowCasterList;
	449	ShadowCasterList mShadowCasterList;
	450	SphereSceneQuery* mShadowCasterSphereQuery;
	451	AxisAlignedBoxSceneQuery* mShadowCasterAABBQuery;
	452	Real mShadowFarDist;
	453	Real mShadowFarDistSquared;
	454	Real mShadowTextureOffset; // proportion of texture offset in view direction e.g. 0.4
	455	Real mShadowTextureFadeStart; // as a proportion e.g. 0.6
	456	Real mShadowTextureFadeEnd; // as a proportion e.g. 0.9
	457	bool mShadowTextureSelfShadow;
	458	Pass* mShadowTextureCustomCasterPass;
	459	Pass* mShadowTextureCustomReceiverPass;
	460	String mShadowTextureCustomCasterVertexProgram;
	461	String mShadowTextureCustomReceiverVertexProgram;
	462	GpuProgramParametersSharedPtr mShadowTextureCustomCasterVPParams;
	463	GpuProgramParametersSharedPtr mShadowTextureCustomReceiverVPParams;
	464	bool mShadowTextureCasterVPDirty;
	465	bool mShadowTextureReceiverVPDirty;
	466
	467
	468	GpuProgramParametersSharedPtr mInfiniteExtrusionParams;
	469	GpuProgramParametersSharedPtr mFiniteExtrusionParams;
	470
	471	/// Inner class to use as callback for shadow caster scene query
	472	class _OgreExport ShadowCasterSceneQueryListener : public SceneQueryListener
	473	{
	474	protected:
	475	SceneManager* mSceneMgr;
	476	ShadowCasterList* mCasterList;
	477	bool mIsLightInFrustum;
	478	const PlaneBoundedVolumeList* mLightClipVolumeList;
	479	const Camera* mCamera;
	480	const Light* mLight;
	481	Real mFarDistSquared;
	482	public:
	483	ShadowCasterSceneQueryListener(SceneManager* sm) : mSceneMgr(sm),
	484	mCasterList(0), mIsLightInFrustum(false), mLightClipVolumeList(0),
	485	mCamera(0) {}
	486	// Prepare the listener for use with a set of parameters
	487	void prepare(bool lightInFrustum,
	488	const PlaneBoundedVolumeList* lightClipVolumes,
	489	const Light* light, const Camera* cam, ShadowCasterList* casterList,
	490	Real farDistSquared)
	491	{
	492	mCasterList = casterList;
	493	mIsLightInFrustum = lightInFrustum;
	494	mLightClipVolumeList = lightClipVolumes;
	495	mCamera = cam;
	496	mLight = light;
	497	mFarDistSquared = farDistSquared;
	498	}
	499	bool queryResult(MovableObject* object);
	500	bool queryResult(SceneQuery::WorldFragment* fragment);
	501	};
	502
	503	ShadowCasterSceneQueryListener* mShadowCasterQueryListener;
	504
	505	/** Internal method for locating a list of shadow casters which
	506	could be affecting the frustum for a given light.
	507	@remarks
	508	Custom scene managers are encouraged to override this method to add optimisations,
	509	and to add their own custom shadow casters (perhaps for world geometry)
	510	*/
	511	virtual const ShadowCasterList& findShadowCastersForLight(const Light* light,
	512	const Camera* camera);
	513	/** Render the objects in a given queue group
	514	*/
	515	virtual void renderQueueGroupObjects(RenderQueueGroup* group);
	516	/** Render a group in the ordinary way */
	517	virtual void renderBasicQueueGroupObjects(RenderQueueGroup* pGroup);
	518	/** Render a group with the added complexity of additive stencil shadows. */
	519	virtual void renderAdditiveStencilShadowedQueueGroupObjects(RenderQueueGroup* group);
	520	/** Render a group with the added complexity of additive stencil shadows. */
	521	virtual void renderModulativeStencilShadowedQueueGroupObjects(RenderQueueGroup* group);
	522	/** Render a group rendering only shadow casters. */
	523	virtual void renderTextureShadowCasterQueueGroupObjects(RenderQueueGroup* group);
	524	/** Render a group rendering only shadow receivers. */
	525	virtual void renderTextureShadowReceiverQueueGroupObjects(RenderQueueGroup* group);
	526	/** Render a group with the added complexity of additive stencil shadows. */
	527	virtual void renderModulativeTextureShadowedQueueGroupObjects(RenderQueueGroup* group);
	528	/** Render a set of objects, see renderSingleObject for param definitions */
	529	virtual void renderObjects(const RenderPriorityGroup::SolidRenderablePassMap& objs,
	530	bool doLightIteration, const LightList* manualLightList = 0);
	531	/** Render a set of objects, see renderSingleObject for param definitions */
	532	virtual void renderObjects(const RenderPriorityGroup::TransparentRenderablePassList& objs,
	533	bool doLightIteration, const LightList* manualLightList = 0);
	534	/** Render those objects in the transparent pass list which have shadow casting forced on
	535	@remarks
	536	This function is intended to be used to render the shadows of transparent objects which have
	537	transparency_casts_shadows set to 'on' in their material
	538	*/
	539	virtual void renderTransparentShadowCasterObjects(const RenderPriorityGroup::TransparentRenderablePassList& objs,
	540	bool doLightIteration, const LightList* manualLightList = 0);
	541
	542	public:
	543	/** Default constructor.
	544	*/
	545	SceneManager();
	546
	547	/** Default destructor.
	548	*/
	549	virtual ~SceneManager();
	550
	551	/** Creates a camera to be managed by this scene manager.
	552	@remarks
	553	This camera must be added to the scene at a later time using
	554	the attachObject method of the SceneNode class.
	555	@param
	556	name Name to give the new camera.
	557	*/
	558	virtual Camera* createCamera(const String& name);
	559
	560	/** Retrieves a pointer to the named camera.
	561	*/
	562	virtual Camera* getCamera(const String& name);
	563
	564	/** Removes a camera from the scene.
	565	@remarks
	566	This method removes a previously added camera from the scene.
	567	The camera is deleted so the caller must ensure no references
	568	to it's previous instance (e.g. in a SceneNode) are used.
	569	@param
	570	cam Pointer to the camera to remove
	571	*/
	572	virtual void removeCamera(Camera *cam);
	573
	574	/** Removes a camera from the scene.
	575	@remarks
	576	This method removes an camera from the scene based on the
	577	camera's name rather than a pointer.
	578	*/
	579	virtual void removeCamera(const String& name);
	580
	581	/** Removes (and destroys) all cameras from the scene.
[657]	582	@remarks
	583	Some cameras are internal created to dealing with texture shadow,
	584	their aren't supposed to destroy outside. So, while you are using
	585	texture shadow, don't call this method, or you can set the shadow
	586	technique other than texture-based, which will destroy all internal
	587	created shadow cameras and textures.
[74]	588	*/
	589	virtual void removeAllCameras(void);
	590
	591	/** Creates a light for use in the scene.
	592	@remarks
	593	Lights can either be in a fixed position and independent of the
	594	scene graph, or they can be attached to SceneNodes so they derive
	595	their position from the parent node. Either way, they are created
	596	using this method so that the SceneManager manages their
	597	existence.
	598	@param
	599	name The name of the new light, to identify it later.
	600	*/
	601	virtual Light* createLight(const String& name);
	602
	603	/** Returns a pointer to the named Light which has previously been added to the scene.
	604	*/
	605	virtual Light* getLight(const String& name);
	606
	607	/** Removes the named light from the scene and destroys it.
	608	@remarks
	609	Any pointers held to this light after calling this method will be invalid.
	610	*/
	611	virtual void removeLight(const String& name);
	612
	613	/** Removes the light from the scene and destroys it based on a pointer.
	614	@remarks
	615	Any pointers held to this light after calling this method will be invalid.
	616	*/
	617	virtual void removeLight(Light* light);
	618	/** Removes and destroys all lights in the scene.
	619	*/
	620	virtual void removeAllLights(void);
	621
	622	/** Populate a light list with an ordered set of the lights which are closest
	623	to the position specified.
	624	@remarks
	625	Note that since directional lights have no position, they are always considered
	626	closer than any point lights and as such will always take precedence.
	627	@par
	628	Subclasses of the default SceneManager may wish to take into account other issues
	629	such as possible visibility of the light if that information is included in their
	630	data structures. This basic scenemanager simply orders by distance, eliminating
	631	those lights which are out of range.
	632	@par
	633	The number of items in the list max exceed the maximum number of lights supported
	634	by the renderer, but the extraneous ones will never be used. In fact the limit will
	635	be imposed by Pass::getMaxSimultaneousLights.
	636	@param position The position at which to evaluate the list of lights
	637	@param radius The bounding radius to test
	638	@param destList List to be populated with ordered set of lights; will be cleared by
	639	this method before population.
	640	*/
	641	virtual void _populateLightList(const Vector3& position, Real radius, LightList& destList);
	642
	643
	644	/** Creates an instance of a SceneNode.
	645	@remarks
	646	Note that this does not add the SceneNode to the scene hierarchy.
	647	This method is for convenience, since it allows an instance to
	648	be created for which the SceneManager is responsible for
	649	allocating and releasing memory, which is convenient in complex
	650	scenes.
	651	@par
	652	To include the returned SceneNode in the scene, use the addChild
	653	method of the SceneNode which is to be it's parent.
	654	@par
	655	Note that this method takes no parameters, and the node created is unnamed (it is
	656	actually given a generated name, which you can retrieve if you want).
	657	If you wish to create a node with a specific name, call the alternative method
	658	which takes a name parameter.
	659	*/
	660	virtual SceneNode* createSceneNode(void);
	661
	662	/** Creates an instance of a SceneNode with a given name.
	663	@remarks
	664	Note that this does not add the SceneNode to the scene hierarchy.
	665	This method is for convenience, since it allows an instance to
	666	be created for which the SceneManager is responsible for
	667	allocating and releasing memory, which is convenient in complex
	668	scenes.
	669	@par
	670	To include the returned SceneNode in the scene, use the addChild
	671	method of the SceneNode which is to be it's parent.
	672	@par
	673	Note that this method takes a name parameter, which makes the node easier to
	674	retrieve directly again later.
	675	*/
	676	virtual SceneNode* createSceneNode(const String& name);
	677
	678	/** Destroys a SceneNode with a given name.
	679	@remarks
	680	This allows you to physically delete an individual SceneNode if you want to.
	681	Note that this is not normally recommended, it's better to allow SceneManager
	682	to delete the nodes when the scene is cleared.
	683	*/
	684	virtual void destroySceneNode(const String& name);
	685
	686	/** Gets the SceneNode at the root of the scene hierarchy.
	687	@remarks
	688	The entire scene is held as a hierarchy of nodes, which
	689	allows things like relative transforms, general changes in
	690	rendering state etc (See the SceneNode class for more info).
	691	In this basic SceneManager class, the application using
	692	Ogre is free to structure this hierarchy however it likes,
	693	since it has no real significance apart from making transforms
	694	relative to each node (more specialised subclasses will
	695	provide utility methods for building specific node structures
	696	e.g. loading a BSP tree).
	697	@par
	698	However, in all cases there is only ever one root node of
	699	the hierarchy, and this method returns a pointer to it.
	700	*/
	701	virtual SceneNode* getRootSceneNode(void) const;
	702
	703	/** Retrieves a named SceneNode from the scene graph.
	704	@remarks
	705	If you chose to name a SceneNode as you created it, or if you
	706	happened to make a note of the generated name, you can look it
	707	up wherever it is in the scene graph using this method.
	708	*/
	709	virtual SceneNode* getSceneNode(const String& name) const;
	710
	711	/** Create an Entity (instance of a discrete mesh).
	712	@param
	713	entityName The name to be given to the entity (must be unique).
	714	@param
	715	meshName The name of the Mesh it is to be based on (e.g. 'knot.oof'). The
	716	mesh will be loaded if it is not already.
	717	*/
	718	virtual Entity* createEntity(const String& entityName, const String& meshName);
	719
	720	/** Prefab shapes available without loading a model.
	721	@note
	722	Minimal implementation at present.
	723	@todo
	724	Add more prefabs (teapots, teapots!!!)
	725	*/
	726	enum PrefabType {
	727	PT_PLANE
	728	};
	729
	730	/** Create an Entity (instance of a discrete mesh) from a range of prefab shapes.
	731	@param
	732	entityName The name to be given to the entity (must be unique).
	733	@param
	734	ptype The prefab type.
	735	*/
	736	virtual Entity* createEntity(const String& entityName, PrefabType ptype);
	737	/** Retrieves a pointer to the named Entity. */
	738	virtual Entity* getEntity(const String& name);
	739
	740	/** Removes & destroys an Entity from the SceneManager.
	741	@warning
	742	Must only be done if the Entity is not attached
	743	to a SceneNode. It may be safer to wait to clear the whole
	744	scene if you are unsure use clearScene.
	745	@see
	746	SceneManager::clearScene
	747	*/
	748	virtual void removeEntity(Entity* ent);
	749
	750	/** Removes & destroys an Entity from the SceneManager by name.
	751	@warning
	752	Must only be done if the Entity is not attached
	753	to a SceneNode. It may be safer to wait to clear the whole
	754	scene if you are unsure use clearScene.
	755	@see
	756	SceneManager::clearScene
	757	*/
	758	virtual void removeEntity(const String& name);
	759
	760	/** Removes & destroys all Entities.
	761	@warning
	762	Again, use caution since no Entity must be referred to
	763	elsewhere e.g. attached to a SceneNode otherwise a crash
	764	is likely. Use clearScene if you are unsure (it clears SceneNode
	765	entries too.)
	766	@see
	767	SceneManager::clearScene
	768	*/
	769	virtual void removeAllEntities(void);
	770
	771	/** Empties the entire scene, inluding all SceneNodes, Entities, Lights,
	772	BillboardSets etc. Cameras are not deleted at this stage since
	773	they are still referenced by viewports, which are not destroyed during
	774	this process.
	775	*/
	776	virtual void clearScene(void);
	777
	778	/** Sets the ambient light level to be used for the scene.
	779	@remarks
	780	This sets the colour and intensity of the ambient light in the scene, i.e. the
	781	light which is 'sourceless' and illuminates all objects equally.
	782	The colour of an object is affected by a combination of the light in the scene,
	783	and the amount of light that object reflects (in this case based on the Material::ambient
	784	property).
	785	@remarks
	786	By default the ambient light in the scene is ColourValue::Black, i.e. no ambient light. This
	787	means that any objects rendered with a Material which has lighting enabled (see Material::setLightingEnabled)
	788	will not be visible unless you have some dynamic lights in your scene.
	789	*/
	790	void setAmbientLight(const ColourValue& colour);
	791
	792	/** Returns the ambient light level to be used for the scene.
	793	*/
	794	const ColourValue& getAmbientLight(void) const;
	795
	796	/** Sets the source of the 'world' geometry, i.e. the large, mainly static geometry
	797	making up the world e.g. rooms, landscape etc.
	798	@remarks
	799	Depending on the type of SceneManager (subclasses will be specialised
	800	for particular world geometry types) you have requested via the Root or
	801	SceneManagerEnumerator classes, you can pass a filename to this method and it
	802	will attempt to load the world-level geometry for use. If you try to load
	803	an inappropriate type of world data an exception will be thrown. The default
	804	SceneManager cannot handle any sort of world geometry and so will always
	805	throw an exception. However subclasses like BspSceneManager can load
	806	particular types of world geometry e.g. "q3dm1.bsp".
	807	@par
	808	World geometry will be loaded via the 'common' resource paths and archives set in the
	809	ResourceManager class.
	810	*/
	811	virtual void setWorldGeometry(const String& filename);
	812
	813	/** Estimate the number of loading stages required to load the named
	814	world geometry.
	815	@remarks
	816	This method should be overridden by SceneManagers that provide
	817	custom world geometry that can take some time to load. They should
	818	return from this method a count of the number of stages of progress
	819	they can report on whilst loading. During real loading (setWorldGeomtry),
	820	they should call ResourceGroupManager::_notifyWorldGeometryProgress exactly
	821	that number of times when loading the geometry for real.
	822	@note
	823	The default is to return 0, ie to not report progress.
	824	*/
	825	virtual size_t estimateWorldGeometry(const String& filename) { return 0; }
	826
	827	/** Asks the SceneManager to provide a suggested viewpoint from which the scene should be viewed.
	828	@remarks
	829	Typically this method returns the origin unless a) world geometry has been loaded using
	830	SceneManager::setWorldGeometry and b) that world geometry has suggested 'start' points.
	831	If there is more than one viewpoint which the scene manager can suggest, it will always suggest
	832	the first one unless the random parameter is true.
	833	@param
	834	random If true, and there is more than one possible suggestion, a random one will be used. If false
	835	the same one will always be suggested.
	836	@return
	837	On success, true is returned.
	838	@par
	839	On failiure, false is returned.
	840	*/
	841	virtual ViewPoint getSuggestedViewpoint(bool random = false);
	842
	843	/** Method for setting a specific option of the Scene Manager. These options are usually
	844	specific for a certain implemntation of the Scene Manager class, and may (and probably
	845	will) not exist across different implementations.
	846	@param
	847	strKey The name of the option to set
	848	@param
	849	pValue A pointer to the value - the size should be calculated by the scene manager
	850	based on the key
	851	@return
	852	On success, true is returned.
	853	@par
	854	On failiure, false is returned.
	855	*/
	856	virtual bool setOption( const String& strKey, const void* pValue ) { return false; }
	857
	858	/** Method for getting the value of an implementation-specific Scene Manager option.
	859	@param
	860	strKey The name of the option
	861	@param
	862	pDestValue A pointer to a memory location where the value will
	863	be copied. Currently, the memory will be allocated by the
	864	scene manager, but this may change
	865	@return
	866	On success, true is returned and pDestValue points to the value of the given
	867	option.
	868	@par
	869	On failiure, false is returned and pDestValue is set to NULL.
	870	*/
	871	virtual bool getOption( const String& strKey, void* pDestValue ) { return false; }
	872
	873	/** Method for verifying wether the scene manager has an implementation-specific
	874	option.
	875	@param
	876	strKey The name of the option to check for.
	877	@return
	878	If the scene manager contains the given option, true is returned.
	879	@remarks
	880	If it does not, false is returned.
	881	*/
	882	virtual bool hasOption( const String& strKey ) const { return false; }
	883	/** Method for getting all possible values for a specific option. When this list is too large
	884	(i.e. the option expects, for example, a float), the return value will be true, but the
	885	list will contain just one element whose size will be set to 0.
	886	Otherwise, the list will be filled with all the possible values the option can
	887	accept.
	888	@param
	889	strKey The name of the option to get the values for.
	890	@param
	891	refValueList A reference to a list that will be filled with the available values.
	892	@return
	893	On success (the option exists), true is returned.
	894	@par
	895	On failure, false is returned.
	896	*/
	897	virtual bool getOptionValues( const String& strKey, StringVector& refValueList ) { return false; }
	898
	899	/** Method for getting all the implementation-specific options of the scene manager.
	900	@param
	901	refKeys A reference to a list that will be filled with all the available options.
	902	@return
	903	On success, true is returned. On failiure, false is returned.
	904	*/
	905	virtual bool getOptionKeys( StringVector& refKeys ) { return false; }
	906
	907	/** Internal method for updating the scene graph ie the tree of SceneNode instances managed by this class.
	908	@remarks
	909	This must be done before issuing objects to the rendering pipeline, since derived transformations from
	910	parent nodes are not updated until required. This SceneManager is a basic implementation which simply
	911	updates all nodes from the root. This ensures the scene is up to date but requires all the nodes
	912	to be updated even if they are not visible. Subclasses could trim this such that only potentially visible
	913	nodes are updated.
	914	*/
	915	virtual void _updateSceneGraph(Camera* cam);
	916
	917	/** Internal method which parses the scene to find visible objects to render.
	918	@remarks
	919	If you're implementing a custom scene manager, this is the most important method to
	920	override since it's here you can apply your custom world partitioning scheme. Once you
	921	have added the appropriate objects to the render queue, you can let the default
	922	SceneManager objects _renderVisibleObjects handle the actual rendering of the objects
	923	you pick.
	924	@par
	925	Any visible objects will be added to a rendering queue, which is indexed by material in order
	926	to ensure objects with the same material are rendered together to minimise render state changes.
	927	*/
	928	virtual void _findVisibleObjects(Camera* cam, bool onlyShadowCasters);
	929
	930	/** Internal method for applying animations to scene nodes.
	931	@remarks
	932	Uses the internally stored AnimationState objects to apply animation to SceneNodes.
	933	*/
	934	virtual void _applySceneAnimations(void);
	935
	936	/** Sends visible objects found in _findVisibleObjects to the rendering engine.
	937	*/
	938	virtual void _renderVisibleObjects(void);
	939
	940	/** Prompts the class to send its contents to the renderer.
	941	@remarks
	942	This method prompts the scene manager to send the
	943	contents of the scene it manages to the rendering
	944	pipeline, possibly preceded by some sorting, culling
	945	or other scene management tasks. Note that this method is not normally called
	946	directly by the user application; it is called automatically
	947	by the Ogre rendering loop.
	948	@param camera Pointer to a camera from whose viewpoint the scene is to
	949	be rendered.
	950	@param vp The target viewport
	951	@param includeOverlays Whether or not overlay objects should be rendered
	952	*/
	953	virtual void _renderScene(Camera* camera, Viewport* vp, bool includeOverlays);
	954
	955	/** Internal method for queueing the sky objects with the params as
	956	previously set through setSkyBox, setSkyPlane and setSkyDome.
	957	*/
	958	virtual void _queueSkiesForRendering(Camera* cam);
	959
	960
	961
	962	/** Notifies the scene manager of its destination render system
	963	@remarks
	964	Called automatically by RenderSystem::addSceneManager
	965	this method simply notifies the manager of the render
	966	system to which its output must be directed.
	967	@param
	968	sys Pointer to the RenderSystem subclass to be used as a render target.
	969	*/
	970	virtual void _setDestinationRenderSystem(RenderSystem* sys);
	971
	972	/** Enables / disables a 'sky plane' i.e. a plane at constant
	973	distance from the camera representing the sky.
	974	@remarks
	975	You can create sky planes yourself using the standard mesh and
	976	entity methods, but this creates a plane which the camera can
	977	never get closer or further away from - it moves with the camera.
	978	(NB you could create this effect by creating a world plane which
	979	was attached to the same SceneNode as the Camera too, but this
	980	would only apply to a single camera whereas this plane applies to
	981	any camera using this scene manager).
	982	@note
	983	To apply scaling, scrolls etc to the sky texture(s) you
	984	should use the TextureUnitState class methods.
	985	@param
	986	enable True to enable the plane, false to disable it
	987	@param
	988	plane Details of the plane, i.e. it's normal and it's
	989	distance from the camera.
	990	@param
	991	materialName The name of the material the plane will use
	992	@param
	993	scale The scaling applied to the sky plane - higher values
	994	mean a bigger sky plane - you may want to tweak this
	995	depending on the size of plane.d and the other
	996	characteristics of your scene
	997	@param
	998	tiling How many times to tile the texture across the sky.
	999	Applies to all texture layers. If you need finer control use
	1000	the TextureUnitState texture coordinate transformation methods.
	1001	@param
	1002	drawFirst If true, the plane is drawn before all other
	1003	geometry in the scene, without updating the depth buffer.
	1004	This is the safest rendering method since all other objects
	1005	will always appear in front of the sky. However this is not
	1006	the most efficient way if most of the sky is often occluded
	1007	by other objects. If this is the case, you can set this
	1008	parameter to false meaning it draws <em>after</em> all other
	1009	geometry which can be an optimisation - however you must
	1010	ensure that the plane.d value is large enough that no objects
	1011	will 'poke through' the sky plane when it is rendered.
	1012	@param
	1013	bow If zero, the plane will be completely flat (like previous
	1014	versions. If above zero, the plane will be curved, allowing
	1015	the sky to appear below camera level. Curved sky planes are
	1016	simular to skydomes, but are more compatable with fog.
	1017	@param xsegments, ysegments
	1018	Determines the number of segments the plane will have to it. This
	1019	is most important when you are bowing the plane, but may also be useful
	1020	if you need tesselation on the plane to perform per-vertex effects.
	1021	@param groupName
	1022	The name of the resource group to which to assign the plane mesh.
	1023	*/
	1024	virtual void setSkyPlane(
	1025	bool enable,
	1026	const Plane& plane, const String& materialName, Real scale = 1000,
	1027	Real tiling = 10, bool drawFirst = true, Real bow = 0,
	1028	int xsegments = 1, int ysegments = 1,
	1029	const String& groupName = ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
	1030
[657]	1031	/** Return whether a key plane is enabled */
	1032	virtual bool isSkyPlaneEnabled(void) const { return mSkyPlaneEnabled; }
	1033
	1034	/** Get the sky plane node, if enabled. */
	1035	virtual SceneNode* getSkyPlaneNode(void) { return mSkyPlaneNode; }
	1036
[74]	1037	/** Enables / disables a 'sky box' i.e. a 6-sided box at constant
	1038	distance from the camera representing the sky.
	1039	@remarks
	1040	You could create a sky box yourself using the standard mesh and
	1041	entity methods, but this creates a plane which the camera can
	1042	never get closer or further away from - it moves with the camera.
	1043	(NB you could create this effect by creating a world box which
	1044	was attached to the same SceneNode as the Camera too, but this
	1045	would only apply to a single camera whereas this skybox applies
	1046	to any camera using this scene manager).
	1047	@par
	1048	The material you use for the skybox can either contain layers
	1049	which are single textures, or they can be cubic textures, i.e.
	1050	made up of 6 images, one for each plane of the cube. See the
	1051	TextureUnitState class for more information.
	1052	@param
	1053	enable True to enable the skybox, false to disable it
	1054	@param
	1055	materialName The name of the material the box will use
	1056	@param
	1057	distance Distance in world coorinates from the camera to
	1058	each plane of the box. The default is normally OK.
	1059	@param
	1060	drawFirst If true, the box is drawn before all other
	1061	geometry in the scene, without updating the depth buffer.
	1062	This is the safest rendering method since all other objects
	1063	will always appear in front of the sky. However this is not
	1064	the most efficient way if most of the sky is often occluded
	1065	by other objects. If this is the case, you can set this
	1066	parameter to false meaning it draws <em>after</em> all other
	1067	geometry which can be an optimisation - however you must
	1068	ensure that the distance value is large enough that no
	1069	objects will 'poke through' the sky box when it is rendered.
	1070	@param
	1071	orientation Optional parameter to specify the orientation
	1072	of the box. By default the 'top' of the box is deemed to be
	1073	in the +y direction, and the 'front' at the -z direction.
	1074	You can use this parameter to rotate the sky if you want.
	1075	@param groupName
	1076	The name of the resource group to which to assign the plane mesh.
	1077	*/
	1078	virtual void setSkyBox(
	1079	bool enable, const String& materialName, Real distance = 5000,
	1080	bool drawFirst = true, const Quaternion& orientation = Quaternion::IDENTITY,
	1081	const String& groupName = ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
	1082
[657]	1083	/** Return whether a skybox is enabled */
	1084	virtual bool isSkyBoxEnabled(void) const { return mSkyBoxEnabled; }
	1085
	1086	/** Get the skybox node, if enabled. */
	1087	virtual SceneNode* getSkyBoxNode(void) const { return mSkyBoxNode; }
	1088
[74]	1089	/** Enables / disables a 'sky dome' i.e. an illusion of a curved sky.
	1090	@remarks
	1091	A sky dome is actually formed by 5 sides of a cube, but with
	1092	texture coordinates generated such that the surface appears
	1093	curved like a dome. Sky domes are appropriate where you need a
	1094	realistic looking sky where the scene is not going to be
	1095	'fogged', and there is always a 'floor' of some sort to prevent
	1096	the viewer looking below the horizon (the distortion effect below
	1097	the horizon can be pretty horrible, and there is never anyhting
	1098	directly below the viewer). If you need a complete wrap-around
	1099	background, use the setSkyBox method instead. You can actually
	1100	combine a sky box and a sky dome if you want, to give a positional
	1101	backdrop with an overlayed curved cloud layer.
	1102	@par
	1103	Sky domes work well with 2D repeating textures like clouds. You
	1104	can change the apparant 'curvature' of the sky depending on how
	1105	your scene is viewed - lower curvatures are better for 'open'
	1106	scenes like landscapes, whilst higher curvatures are better for
	1107	say FPS levels where you don't see a lot of the sky at once and
	1108	the exaggerated curve looks good.
	1109	@param
	1110	enable True to enable the skydome, false to disable it
	1111	@param
	1112	materialName The name of the material the dome will use
	1113	@param
	1114	curvature The curvature of the dome. Good values are
	1115	between 2 and 65. Higher values are more curved leading to
	1116	a smoother effect, lower values are less curved meaning
	1117	more distortion at the horizons but a better distance effect.
	1118	@param
	1119	tiling How many times to tile the texture(s) across the
	1120	dome.
	1121	@param
	1122	distance Distance in world coorinates from the camera to
	1123	each plane of the box the dome is rendered on. The default
	1124	is normally OK.
	1125	@param
	1126	drawFirst If true, the dome is drawn before all other
	1127	geometry in the scene, without updating the depth buffer.
	1128	This is the safest rendering method since all other objects
	1129	will always appear in front of the sky. However this is not
	1130	the most efficient way if most of the sky is often occluded
	1131	by other objects. If this is the case, you can set this
	1132	parameter to false meaning it draws <em>after</em> all other
	1133	geometry which can be an optimisation - however you must
	1134	ensure that the distance value is large enough that no
	1135	objects will 'poke through' the sky when it is rendered.
	1136	@param
	1137	orientation Optional parameter to specify the orientation
	1138	of the dome. By default the 'top' of the dome is deemed to
	1139	be in the +y direction, and the 'front' at the -z direction.
	1140	You can use this parameter to rotate the sky if you want.
	1141	@param groupName
	1142	The name of the resource group to which to assign the plane mesh.
	1143	*/
	1144	virtual void setSkyDome(
	1145	bool enable, const String& materialName, Real curvature = 10,
	1146	Real tiling = 8, Real distance = 4000, bool drawFirst = true,
	1147	const Quaternion& orientation = Quaternion::IDENTITY,
	1148	int xsegments = 16, int ysegments = 16, int ysegments_keep = -1,
	1149	const String& groupName = ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
	1150
[657]	1151	/** Return whether a skydome is enabled */
	1152	virtual bool isSkyDomeEnabled(void) const { return mSkyDomeEnabled; }
	1153
	1154	/** Get the sky dome node, if enabled. */
	1155	virtual SceneNode* getSkyDomeNode(void) { return mSkyDomeNode; }
	1156
[74]	1157	/** Sets the fogging mode applied to the scene.
	1158	@remarks
	1159	This method sets up the scene-wide fogging effect. These settings
	1160	apply to all geometry rendered, UNLESS the material with which it
	1161	is rendered has it's own fog settings (see Material::setFog).
	1162	@param
	1163	mode Set up the mode of fog as described in the FogMode
	1164	enum, or set to FOG_NONE to turn off.
	1165	@param
	1166	colour The colour of the fog. Either set this to the same
	1167	as your viewport background colour, or to blend in with a
	1168	skydome or skybox.
	1169	@param
	1170	expDensity The density of the fog in FOG_EXP or FOG_EXP2
	1171	mode, as a value between 0 and 1. The default is 0.001.
	1172	@param
	1173	linearStart Distance in world units at which linear fog starts to
	1174	encroach. Only applicable if mode is
	1175	FOG_LINEAR.
	1176	@param
	1177	linearEnd Distance in world units at which linear fog becomes completely
	1178	opaque. Only applicable if mode is
	1179	FOG_LINEAR.
	1180	*/
	1181	void setFog(
	1182	FogMode mode = FOG_NONE, const ColourValue& colour = ColourValue::White,
	1183	Real expDensity = 0.001, Real linearStart = 0.0, Real linearEnd = 1.0);
	1184
	1185	/** Returns the fog mode for the scene.
	1186	*/
	1187	virtual FogMode getFogMode(void) const;
	1188
	1189	/** Returns the fog colour for the scene.
	1190	*/
	1191	virtual const ColourValue& getFogColour(void) const;
	1192
	1193	/** Returns the fog start distance for the scene.
	1194	*/
	1195	virtual Real getFogStart(void) const;
	1196
	1197	/** Returns the fog end distance for the scene.
	1198	*/
	1199	virtual Real getFogEnd(void) const;
	1200
	1201	/** Returns the fog density for the scene.
	1202	*/
	1203	virtual Real getFogDensity(void) const;
	1204
	1205
	1206	/** Creates a new BillboardSet for use with this scene manager.
	1207	@remarks
	1208	This method creates a new BillboardSet which is registered with
	1209	the SceneManager. The SceneManager will destroy this object when
	1210	it shuts down or when the SceneManager::clearScene method is
	1211	called, so the caller does not have to worry about destroying
	1212	this object (in fact, it definitely should not do this).
	1213	@par
	1214	See the BillboardSet documentations for full details of the
	1215	returned class.
	1216	@param
	1217	name The name to give to this billboard set. Must be unique.
	1218	@param
	1219	poolSize The initial size of the pool of billboards (see BillboardSet for more information)
	1220	@see
	1221	BillboardSet
	1222	*/
	1223	virtual BillboardSet* createBillboardSet(const String& name, unsigned int poolSize = 20);
	1224
	1225	/** Retrieves a pointer to the named BillboardSet.
	1226	*/
	1227	virtual BillboardSet* getBillboardSet(const String& name);
	1228
	1229	/** Removes & destroys an BillboardSet from the SceneManager.
	1230	@warning
	1231	Must only be done if the BillboardSet is not attached
	1232	to a SceneNode. It may be safer to wait to clear the whole
	1233	scene. If you are unsure, use clearScene.
	1234	*/
	1235	virtual void removeBillboardSet(BillboardSet* set);
	1236
	1237	/** Removes & destroys an BillboardSet from the SceneManager by name.
	1238	@warning
	1239	Must only be done if the BillboardSet is not attached
	1240	to a SceneNode. It may be safer to wait to clear the whole
	1241	scene. If you are unsure, use clearScene.
	1242	*/
	1243	virtual void removeBillboardSet(const String& name);
	1244
	1245	/** Removes & destroys all BillboardSets.
	1246	@warning
	1247	Again, use caution since no BillboardSet must be referred to
	1248	elsewhere e.g. attached to a SceneNode otherwise a crash
	1249	is likely. Use clearScene if you are unsure (it clears SceneNode
	1250	entries too.)
	1251	@see
	1252	SceneManager::clearScene
	1253	*/
	1254	virtual void removeAllBillboardSets(void);
	1255
	1256	/** Tells the SceneManager whether it should render the SceneNodes which
	1257	make up the scene as well as the objects in the scene.
	1258	@remarks
	1259	This method is mainly for debugging purposes. If you set this to 'true',
	1260	each node will be rendered as a set of 3 axes to allow you to easily see
	1261	the orientation of the nodes.
	1262	*/
	1263	virtual void setDisplaySceneNodes(bool display);
	1264
	1265	/** Creates an animation which can be used to animate scene nodes.
	1266	@remarks
	1267	An animation is a collection of 'tracks' which over time change the position / orientation
	1268	of Node objects. In this case, the animation will likely have tracks to modify the position
	1269	/ orientation of SceneNode objects, e.g. to make objects move along a path.
	1270	@par
	1271	You don't need to use an Animation object to move objects around - you can do it yourself
	1272	using the methods of the Node in your FrameListener class. However, when you need relatively
	1273	complex scripted animation, this is the class to use since it will interpolate between
	1274	keyframes for you and generally make the whole process easier to manage.
	1275	@par
	1276	A single animation can affect multiple Node objects (each AnimationTrack affects a single Node).
	1277	In addition, through animation blending a single Node can be affected by multiple animations,
	1278	athough this is more useful when performing skeletal animation (see Skeleton::createAnimation).
	1279	@par
	1280	Note that whilst it uses the same classes, the animations created here are kept separate from the
	1281	skeletal animations of meshes (each Skeleton owns those animations).
	1282	@param name The name of the animation, must be unique within this SceneManager.
	1283	@param length The total length of the animation.
	1284	*/
	1285	virtual Animation* createAnimation(const String& name, Real length);
	1286
	1287	/** Looks up an Animation object previously created with createAnimation. */
	1288	virtual Animation* getAnimation(const String& name) const;
	1289
	1290	/** Destroys an Animation.
	1291	@remarks
	1292	You should ensure that none of your code is referencing this animation objects since the
	1293	memory will be freed.
	1294	*/
	1295	virtual void destroyAnimation(const String& name);
	1296
	1297	/** Removes all animations created using this SceneManager. */
	1298	virtual void destroyAllAnimations(void);
	1299
	1300	/** Create an AnimationState object for managing application of animations.
	1301	@remarks
	1302	You can create Animation objects for animating SceneNode obejcts using the
	1303	createAnimation method. However, in order to actually apply those animations
	1304	you have to call methods on Node and Animation in a particular order (namely
	1305	Node::resetToInitialState and Animation::apply). To make this easier and to
	1306	help track the current time position of animations, the AnimationState object
	1307	is provided. </p>
	1308	So if you don't want to control animation application manually, call this method,
	1309	update the returned object as you like every frame and let SceneManager apply
	1310	the animation state for you.
	1311	@par
	1312	Remember, AnimationState objects are disabled by default at creation time.
	1313	Turn them on when you want them using their setEnabled method.
	1314	@par
	1315	Note that any SceneNode affected by this automatic animation will have it's state
	1316	reset to it's initial position before application of the animation. Unless specifically
	1317	modified using Node::setInitialState the Node assumes it's initial state is at the
	1318	origin. If you want the base state of the SceneNode to be elsewhere, make your changes
	1319	to the node using the standard transform methods, then call setInitialState to
	1320	'bake' this reference position into the node.
	1321	@param animName The name of an animation created already with createAnimation.
	1322	*/
	1323	virtual AnimationState* createAnimationState(const String& animName);
	1324
	1325	/** Retrieves animation state as previously created using createAnimationState */
	1326	virtual AnimationState* getAnimationState(const String& animName);
	1327
	1328	/** Destroys an AnimationState.
	1329	@remarks
	1330	You should ensure that none of your code is referencing this animation
	1331	state object since the memory will be freed.
	1332	*/
	1333	virtual void destroyAnimationState(const String& name);
	1334
	1335	/** Removes all animation states created using this SceneManager. */
	1336	virtual void destroyAllAnimationStates(void);
	1337
	1338	/** Manual rendering method, for advanced users only.
	1339	@remarks
	1340	This method allows you to send rendering commands through the pipeline on
	1341	demand, bypassing OGRE's normal world processing. You should only use this if you
	1342	really know what you're doing; OGRE does lots of things for you that you really should
	1343	let it do. However, there are times where it may be useful to have this manual interface,
	1344	for example overlaying something on top of the scene rendered by OGRE.
	1345	@par
	1346	Because this is an instant rendering method, timing is important. The best
	1347	time to call it is from a RenderTargetListener event handler.
	1348	@par
	1349	Don't call this method a lot, it's designed for rare (1 or 2 times per frame) use.
	1350	Calling it regularly per frame will cause frame rate drops!
	1351	@param rend A RenderOperation object describing the rendering op
	1352	@param pass The Pass to use for this render
	1353	@param vp Pointer to the viewport to render to
	1354	@param worldMatrix The transform to apply from object to world space
	1355	@param viewMatrix The transform to apply from world to view space
	1356	@param projMatrix The transform to apply from view to screen space
	1357	@param doBeginEndFrame If true, beginFrame() and endFrame() are called,
	1358	otherwise not. You should leave this as false if you are calling
	1359	this within the main render loop.
	1360	*/
	1361	virtual void manualRender(RenderOperation* rend, Pass* pass, Viewport* vp,
	1362	const Matrix4& worldMatrix, const Matrix4& viewMatrix, const Matrix4& projMatrix,
	1363	bool doBeginEndFrame = false) ;
	1364
[657]	1365	/** Retrieves the internal render queue, for advanced users only.
	1366	@remarks
	1367	The render queue is mainly used internally to manage the scene object
	1368	rendering queue, it also exports some methods to allow advanced users
	1369	to configure the behavior of rendering process.
	1370	Most methods provided by RenderQueue are supposed to be used
	1371	internally only, you should reference to the RenderQueue API for
	1372	more information. Do not access this directly unless you know what
	1373	you are doing.
	1374	*/
	1375	virtual RenderQueue* getRenderQueue(void);
	1376
[74]	1377	/** Registers a new RenderQueueListener which will be notified when render queues
	1378	are processed.
	1379	*/
	1380	virtual void addRenderQueueListener(RenderQueueListener* newListener);
	1381
	1382	/** Removes a listener previously added with addRenderQueueListener. */
	1383	virtual void removeRenderQueueListener(RenderQueueListener* delListener);
	1384
	1385	/** Adds an item to the 'special case' render queue list.
	1386	@remarks
	1387	Normally all render queues are rendered, in their usual sequence,
	1388	only varying if a RenderQueueListener nominates for the queue to be
	1389	repeated or skipped. This method allows you to add a render queue to
	1390	a 'special case' list, which varies the behaviour. The effect of this
	1391	list depends on the 'mode' in which this list is in, which might be
	1392	to exclude these render queues, or to include them alone (excluding
	1393	all other queues). This allows you to perform broad selective
	1394	rendering without requiring a RenderQueueListener.
	1395	@param qid The identifier of the queue which should be added to the
	1396	special case list. Nothing happens if the queue is already in the list.
	1397	*/
	1398	virtual void addSpecialCaseRenderQueue(RenderQueueGroupID qid);
	1399	/** Removes an item to the 'special case' render queue list.
	1400	@see SceneManager::addSpecialCaseRenderQueue
	1401	@param qid The identifier of the queue which should be removed from the
	1402	special case list. Nothing happens if the queue is not in the list.
	1403	*/
	1404	virtual void removeSpecialCaseRenderQueue(RenderQueueGroupID qid);
	1405	/** Clears the 'special case' render queue list.
	1406	@see SceneManager::addSpecialCaseRenderQueue
	1407	*/
	1408	virtual void clearSpecialCaseRenderQueues(void);
	1409	/** Sets the way the special case render queue list is processed.
	1410	@see SceneManager::addSpecialCaseRenderQueue
	1411	@param mode The mode of processing
	1412	*/
	1413	virtual void setSpecialCaseRenderQueueMode(SpecialCaseRenderQueueMode mode);
	1414	/** Gets the way the special case render queue list is processed. */
	1415	virtual SpecialCaseRenderQueueMode getSpecialCaseRenderQueueMode(void);
	1416	/** Returns whether or not the named queue will be rendered based on the
	1417	current 'special case' render queue list and mode.
	1418	@see SceneManager::addSpecialCaseRenderQueue
	1419	@param qid The identifier of the queue which should be tested
	1420	@returns true if the queue will be rendered, false otherwise
	1421	*/
	1422	virtual bool isRenderQueueToBeProcessed(RenderQueueGroupID qid);
	1423
	1424	/** Sets the render queue that the world geometry (if any) this SceneManager
	1425	renders will be associated with.
	1426	@remarks
	1427	SceneManagers which provide 'world geometry' should place it in a
	1428	specialised render queue in order to make it possible to enable /
	1429	disable it easily using the addSpecialCaseRenderQueue method. Even
	1430	if the SceneManager does not use the render queues to render the
	1431	world geometry, it should still pick a queue to represent it's manual
	1432	rendering, and check isRenderQueueToBeProcessed before rendering.
	1433	@note
	1434	Setting this may not affect the actual ordering of rendering the
	1435	world geometry, if the world geometry is being rendered manually
	1436	by the SceneManager. If the SceneManager feeds world geometry into
	1437	the queues, however, the ordering will be affected.
	1438	*/
	1439	virtual void setWorldGeometryRenderQueue(RenderQueueGroupID qid);
	1440	/** Gets the render queue that the world geometry (if any) this SceneManager
	1441	renders will be associated with.
	1442	@remarks
	1443	SceneManagers which provide 'world geometry' should place it in a
	1444	specialised render queue in order to make it possible to enable /
	1445	disable it easily using the addSpecialCaseRenderQueue method. Even
	1446	if the SceneManager does not use the render queues to render the
	1447	world geometry, it should still pick a queue to represent it's manual
	1448	rendering, and check isRenderQueueToBeProcessed before rendering.
	1449	*/
	1450	virtual RenderQueueGroupID getWorldGeometryRenderQueue(void);
	1451
	1452	/** Allows all bounding boxes of scene nodes to be displayed. */
	1453	virtual void showBoundingBoxes(bool bShow);
	1454
	1455	/** Returns if all bounding boxes of scene nodes are to be displayed */
	1456	virtual bool getShowBoundingBoxes() const;
	1457
	1458	/** Internal method for notifying the manager that a SceneNode is autotracking. */
	1459	virtual void _notifyAutotrackingSceneNode(SceneNode* node, bool autoTrack);
	1460
	1461
	1462	/** Creates an AxisAlignedBoxSceneQuery for this scene manager.
	1463	@remarks
	1464	This method creates a new instance of a query object for this scene manager,
	1465	for an axis aligned box region. See SceneQuery and AxisAlignedBoxSceneQuery
	1466	for full details.
	1467	@par
	1468	The instance returned from this method must be destroyed by calling
	1469	SceneManager::destroyQuery when it is no longer required.
	1470	@param box Details of the box which describes the region for this query.
	1471	@param mask The query mask to apply to this query; can be used to filter out
	1472	certain objects; see SceneQuery for details.
	1473	*/
	1474	virtual AxisAlignedBoxSceneQuery*
	1475	createAABBQuery(const AxisAlignedBox& box, unsigned long mask = 0xFFFFFFFF);
	1476	/** Creates a SphereSceneQuery for this scene manager.
	1477	@remarks
	1478	This method creates a new instance of a query object for this scene manager,
	1479	for a spherical region. See SceneQuery and SphereSceneQuery
	1480	for full details.
	1481	@par
	1482	The instance returned from this method must be destroyed by calling
	1483	SceneManager::destroyQuery when it is no longer required.
	1484	@param sphere Details of the sphere which describes the region for this query.
	1485	@param mask The query mask to apply to this query; can be used to filter out
	1486	certain objects; see SceneQuery for details.
	1487	*/
	1488	virtual SphereSceneQuery*
	1489	createSphereQuery(const Sphere& sphere, unsigned long mask = 0xFFFFFFFF);
	1490	/** Creates a PlaneBoundedVolumeListSceneQuery for this scene manager.
	1491	@remarks
	1492	This method creates a new instance of a query object for this scene manager,
	1493	for a region enclosed by a set of planes (normals pointing inwards).
	1494	See SceneQuery and PlaneBoundedVolumeListSceneQuery for full details.
	1495	@par
	1496	The instance returned from this method must be destroyed by calling
	1497	SceneManager::destroyQuery when it is no longer required.
	1498	@param volumes Details of the volumes which describe the region for this query.
	1499	@param mask The query mask to apply to this query; can be used to filter out
	1500	certain objects; see SceneQuery for details.
	1501	*/
	1502	virtual PlaneBoundedVolumeListSceneQuery*
	1503	createPlaneBoundedVolumeQuery(const PlaneBoundedVolumeList& volumes, unsigned long mask = 0xFFFFFFFF);
	1504
	1505
	1506	/** Creates a RaySceneQuery for this scene manager.
	1507	@remarks
	1508	This method creates a new instance of a query object for this scene manager,
	1509	looking for objects which fall along a ray. See SceneQuery and RaySceneQuery
	1510	for full details.
	1511	@par
	1512	The instance returned from this method must be destroyed by calling
	1513	SceneManager::destroyQuery when it is no longer required.
	1514	@param ray Details of the ray which describes the region for this query.
	1515	@param mask The query mask to apply to this query; can be used to filter out
	1516	certain objects; see SceneQuery for details.
	1517	*/
	1518	virtual RaySceneQuery*
	1519	createRayQuery(const Ray& ray, unsigned long mask = 0xFFFFFFFF);
	1520	//PyramidSceneQuery* createPyramidQuery(const Pyramid& p, unsigned long mask = 0xFFFFFFFF);
	1521	/** Creates an IntersectionSceneQuery for this scene manager.
	1522	@remarks
	1523	This method creates a new instance of a query object for locating
	1524	intersecting objects. See SceneQuery and IntersectionSceneQuery
	1525	for full details.
	1526	@par
	1527	The instance returned from this method must be destroyed by calling
	1528	SceneManager::destroyQuery when it is no longer required.
	1529	@param mask The query mask to apply to this query; can be used to filter out
	1530	certain objects; see SceneQuery for details.
	1531	*/
	1532	virtual IntersectionSceneQuery*
	1533	createIntersectionQuery(unsigned long mask = 0xFFFFFFFF);
	1534
	1535	/** Destroys a scene query of any type. */
	1536	virtual void destroyQuery(SceneQuery* query);
	1537
	1538	typedef MapIterator<SceneLightList> LightIterator;
	1539	typedef MapIterator<EntityList> EntityIterator;
	1540	typedef MapIterator<CameraList> CameraIterator;
	1541	typedef MapIterator<BillboardSetList> BillboardSetIterator;
	1542	typedef MapIterator<AnimationList> AnimationIterator;
	1543
	1544	/** Returns a specialised MapIterator over all lights in the scene. */
	1545	LightIterator getLightIterator(void) {
	1546	return LightIterator(mLights.begin(), mLights.end());
	1547	}
	1548	/** Returns a specialised MapIterator over all entities in the scene. */
	1549	EntityIterator getEntityIterator(void) {
	1550	return EntityIterator(mEntities.begin(), mEntities.end());
	1551	}
	1552	/** Returns a specialised MapIterator over all cameras in the scene. */
	1553	CameraIterator getCameraIterator(void) {
	1554	return CameraIterator(mCameras.begin(), mCameras.end());
	1555	}
	1556	/** Returns a specialised MapIterator over all BillboardSets in the scene. */
	1557	BillboardSetIterator getBillboardSetIterator(void) {
	1558	return BillboardSetIterator(mBillboardSets.begin(), mBillboardSets.end());
	1559	}
	1560	/** Returns a specialised MapIterator over all animations in the scene. */
	1561	AnimationIterator getAnimationIterator(void) {
	1562	return AnimationIterator(mAnimationsList.begin(), mAnimationsList.end());
	1563	}
	1564	/** Returns a specialised MapIterator over all animation states in the scene. */
	1565	AnimationStateIterator getAnimationStateIterator(void) {
	1566	return AnimationStateIterator(mAnimationStates.begin(), mAnimationStates.end());
	1567	}
	1568
	1569	/** Sets the general shadow technique to be used in this scene.
	1570	@remarks
	1571	There are multiple ways to generate shadows in a scene, and each has
	1572	strengths and weaknesses.
	1573	<ul><li>Stencil-based approaches can be used to
	1574	draw very long, extreme shadows without loss of precision and the 'additive'
	1575	version can correctly show the shadowing of complex effects like bump mapping
	1576	because they physically exclude the light from those areas. However, the edges
	1577	are very sharp and stencils cannot handle transparency, and they involve a
	1578	fair amount of CPU work in order to calculate the shadow volumes, especially
	1579	when animated objects are involved.</li>
	1580	<li>Texture-based approaches are good for handling transparency (they can, for
	1581	example, correctly shadow a mesh which uses alpha to represent holes), and they
	1582	require little CPU overhead, and can happily shadow geometry which is deformed
	1583	by a vertex program, unlike stencil shadows. However, they have a fixed precision
	1584	which can introduce 'jaggies' at long range and have fillrate issues of their own.</li>
	1585	</ul>
	1586	@par
	1587	We support 2 kinds of stencil shadows, and 2 kinds of texture-based shadows, and one
	1588	simple decal approach. The 2 stencil approaches differ in the amount of multipass work
	1589	that is required - the modulative approach simply 'darkens' areas in shadow after the
	1590	main render, which is the least expensive, whilst the additive approach has to perform
	1591	a render per light and adds the cumulative effect, whcih is more expensive but more
	1592	accurate. The texture based shadows both work in roughly the same way, the only difference is
	1593	that the shadowmap approach is slightly more accurate, but requires a more recent
	1594	graphics card.
	1595	@par
	1596	Note that because mixing many shadow techniques can cause problems, only one technique
	1597	is supported at once. Also, you should call this method at the start of the
	1598	scene setup.
	1599	@param technique The shadowing technique to use for the scene.
	1600	*/
	1601	virtual void setShadowTechnique(ShadowTechnique technique);
	1602
	1603	/** Gets the current shadow technique. */
	1604	virtual ShadowTechnique getShadowTechnique(void) const { return mShadowTechnique; }
	1605
	1606	/** Enables / disables the rendering of debug information for shadows. */
	1607	virtual void setShowDebugShadows(bool debug) { mDebugShadows = debug; }
	1608	/** Are debug shadows shown? */
	1609	virtual bool getShowDebugShadows(void ) const { return mDebugShadows; }
	1610
	1611	/** Set the colour used to modulate areas in shadow.
	1612	@remarks This is only applicable for shadow techniques which involve
	1613	darkening the area in shadow, as opposed to masking out the light.
	1614	This colour provided is used as a modulative value to darken the
	1615	areas.
	1616	*/
	1617	virtual void setShadowColour(const ColourValue& colour);
	1618	/** Get the colour used to modulate areas in shadow.
	1619	@remarks This is only applicable for shadow techniques which involve
	1620	darkening the area in shadow, as opposed to masking out the light.
	1621	This colour provided is used as a modulative value to darken the
	1622	areas.
	1623	*/
	1624	virtual const ColourValue& getShadowColour(void) const;
	1625	/** Sets the distance a shadow volume is extruded for a directional light.
	1626	@remarks
	1627	Although directional lights are essentially infinite, there are many
	1628	reasons to limit the shadow extrusion distance to a finite number,
	1629	not least of which is compatibility with older cards (which do not
	1630	support infinite positions), and shadow caster elimination.
	1631	@par
	1632	The default value is 10,000 world units. This does not apply to
	1633	point lights or spotlights, since they extrude up to their
	1634	attenuation range.
	1635	*/
	1636	virtual void setShadowDirectionalLightExtrusionDistance(Real dist);
	1637	/** Gets the distance a shadow volume is extruded for a directional light.
	1638	*/
	1639	virtual Real getShadowDirectionalLightExtrusionDistance(void) const;
	1640	/** Sets the maximum distance away from the camera that shadows
	1641	will be visible.
	1642	@remarks
	1643	Shadow techniques can be expensive, therefore it is a good idea
	1644	to limit them to being rendered close to the camera if possible,
	1645	and to skip the expense of rendering shadows for distance objects.
	1646	This method allows you to set the distance at which shadows will no
	1647	longer be rendered.
	1648	@note
	1649	Each shadow technique can interpret this subtely differently.
	1650	For example, one technique may use this to eliminate casters,
	1651	another might use it to attenuate the shadows themselves.
	1652	You should tweak this value to suit your chosen shadow technique
	1653	and scene setup.
	1654	*/
	1655	virtual void setShadowFarDistance(Real distance);
	1656	/** Gets the maximum distance away from the camera that shadows
	1657	will be visible.
	1658	*/
	1659	virtual Real getShadowFarDistance(void) const
	1660	{ return mShadowFarDist; }
	1661
	1662	/** Sets the maximum size of the index buffer used to render shadow
	1663	primitives.
	1664	@remarks
	1665	This method allows you to tweak the size of the index buffer used
	1666	to render shadow primitives (including stencil shadow volumes). The
	1667	default size is 51,200 entries, which is 100k of GPU memory, or
	1668	enough to render approximately 17,000 triangles. You can reduce this
	1669	as long as you do not have any models / world geometry chunks which
	1670	could require more than the amount you set.
	1671	@par
	1672	The maximum number of triangles required to render a single shadow
	1673	volume (including light and dark caps when needed) will be 3x the
	1674	number of edges on the light silhouette, plus the number of
	1675	light-facing triangles. On average, half the
	1676	triangles will be facing toward the light, but the number of
	1677	triangles in the silhouette entirely depends on the mesh -
	1678	angular meshes will have a higher silhouette tris/mesh tris
	1679	ratio than a smooth mesh. You can estimate the requirements for
	1680	your particular mesh by rendering it alone in a scene with shadows
	1681	enabled and a single light - rotate it or the light and make a note
	1682	of how high the triangle count goes (remembering to subtract the
	1683	mesh triangle count)
	1684	@param size The number of indexes; divide this by 3 to determine the
	1685	number of triangles.
	1686	*/
	1687	virtual void setShadowIndexBufferSize(size_t size);
	1688	/// Get the size of the shadow index buffer
	1689	virtual size_t getShadowIndexBufferSize(void) const
	1690	{ return mShadowIndexBufferSize; }
	1691	/** Set the size of the texture used for texture-based shadows.
	1692	@remarks
	1693	The larger the shadow texture, the better the detail on
	1694	texture based shadows, but obviously this takes more memory.
	1695	The default size is 512. Sizes must be a power of 2.
	1696	*/
	1697	virtual void setShadowTextureSize(unsigned short size);
	1698	/// Get the size of the texture used for texture based shadows
	1699	unsigned short getShadowTextureSize(void) const {return mShadowTextureSize; }
	1700	/** Set the pixel format of the textures used for texture-based shadows.
	1701	@remarks
	1702	By default, a colour texture is used (PF_X8R8G8B8) for texture shadows,
	1703	but if you want to use more advanced texture shadow types you can
	1704	alter this. If you do, you will have to also call
	1705	setShadowTextureCasterMaterial and setShadowTextureReceiverMaterial
	1706	to provide shader-based materials to use these customised shadow
	1707	texture formats.
	1708	*/
	1709	virtual void setShadowTexturePixelFormat(PixelFormat fmt);
	1710	/// Get the format of the textures used for texture based shadows
	1711	PixelFormat getShadowTexturePixelFormat(void) const {return mShadowTextureFormat; }
	1712	/** Set the number of textures allocated for texture-based shadows.
	1713	@remarks
	1714	The default number of textures assigned to deal with texture based
	1715	shadows is 1; however this means you can only have one light casting
	1716	shadows at the same time. You can increase this number in order to
	1717	make this more flexible, but be aware of the texture memory it will use.
	1718	*/
	1719	virtual void setShadowTextureCount(unsigned short count);
	1720	/// Get the number of the textures allocated for texture based shadows
	1721	unsigned short getShadowTextureCount(void) const {return mShadowTextureCount; }
	1722	/** Sets the size and count of textures used in texture-based shadows.
	1723	@remarks
	1724	@see setShadowTextureSize and setShadowTextureCount for details, this
	1725	method just allows you to change both at once, which can save on
	1726	reallocation if the textures have already been created.
	1727	*/
	1728	virtual void setShadowTextureSettings(unsigned short size, unsigned short count,
	1729	PixelFormat fmt = PF_X8R8G8B8);
	1730	/** Sets the proportional distance which a texture shadow which is generated from a
	1731	directional light will be offset into the camera view to make best use of texture space.
	1732	@remarks
	1733	When generating a shadow texture from a directional light, an approximation is used
	1734	since it is not possible to render the entire scene to one texture.
	1735	The texture is projected onto an area centred on the camera, and is
	1736	the shadow far distance * 2 in length (it is square). This wastes
	1737	a lot of texture space outside the frustum though, so this offset allows
	1738	you to move the texture in front of the camera more. However, be aware
	1739	that this can cause a little shadow 'jittering' during rotation, and
	1740	that if you move it too far then you'll start to get artefacts close
	1741	to the camera. The value is represented as a proportion of the shadow
	1742	far distance, and the default is 0.6.
	1743	*/
	1744	virtual void setShadowDirLightTextureOffset(Real offset) { mShadowTextureOffset = offset;}
	1745	/** Sets the proportional distance at which texture shadows begin to fade out.
	1746	@remarks
	1747	To hide the edges where texture shadows end (in directional lights)
	1748	Ogre will fade out the shadow in the distance. This value is a proportional
	1749	distance of the entire shadow visibility distance at which the shadow
	1750	begins to fade out. The default is 0.7
	1751	*/
	1752	virtual void setShadowTextureFadeStart(Real fadeStart)
	1753	{ mShadowTextureFadeStart = fadeStart; }
	1754	/** Sets the proportional distance at which texture shadows finish to fading out.
	1755	@remarks
	1756	To hide the edges where texture shadows end (in directional lights)
	1757	Ogre will fade out the shadow in the distance. This value is a proportional
	1758	distance of the entire shadow visibility distance at which the shadow
	1759	is completely invisible. The default is 0.9.
	1760	*/
	1761	virtual void setShadowTextureFadeEnd(Real fadeEnd)
	1762	{ mShadowTextureFadeEnd = fadeEnd; }
	1763
	1764	/** Sets whether or not texture shadows should attempt to self-shadow.
	1765	@remarks
	1766	The default implementation of texture shadows uses a fixed-function
	1767	colour texture projection approach for maximum compatibility, and
	1768	as such cannot support self-shadowing. However, if you decide to
	1769	implement a more complex shadowing technique using the
	1770	setShadowTextureCasterMaterial and setShadowTextureReceiverMaterial
	1771	there is a possibility you may be able to support
	1772	self-shadowing (e.g by implementing a shader-based shadow map). In
	1773	this case you might want to enable this option.
	1774	@param selfShadow Whether to attempt self-shadowing with texture shadows
	1775	*/
	1776	virtual void setShadowTextureSelfShadow(bool selfShadow)
	1777	{ mShadowTextureSelfShadow = selfShadow; }
	1778	/// Gets whether or not texture shadows attempt to self-shadow.
	1779	virtual bool getShadowTextureSelfShadow(void) const
	1780	{ return mShadowTextureSelfShadow; }
	1781	/** Sets the default material to use for rendering shadow casters.
	1782	@remarks
	1783	By default shadow casters are rendered into the shadow texture using
	1784	an automatically generated fixed-function pass. This allows basic
	1785	projective texture shadows, but it's possible to use more advanced
	1786	shadow techniques by overriding the caster and receiver materials, for
	1787	example providing vertex and fragment programs to implement shadow
	1788	maps.
	1789	@par
	1790	You can rely on the ambient light in the scene being set to the
	1791	requested texture shadow colour, if that's useful.
	1792	@note
	1793	Individual objects may also override the vertex program in
	1794	your default material if their materials include
	1795	shadow_caster_vertex_program_ref shadow_receiver_vertex_program_ref
	1796	entries, so if you use both make sure they are compatible.
	1797	@note
	1798	Only a single pass is allowed in your material, although multiple
	1799	techniques may be used for hardware fallback.
	1800	*/
	1801	virtual void setShadowTextureCasterMaterial(const String& name);
	1802	/** Sets the default material to use for rendering shadow receivers.
	1803	@remarks
	1804	By default shadow receivers are rendered as a post-pass using basic
	1805	modulation. This allows basic projective texture shadows, but it's
	1806	possible to use more advanced shadow techniques by overriding the
	1807	caster and receiver materials, for example providing vertex and
	1808	fragment programs to implement shadow maps.
	1809	@par
	1810	You can rely on texture unit 0 containing the shadow texture, and
	1811	for the unit to be set to use projective texturing from the light
	1812	(only useful if you're using fixed-function, which is unlikely;
	1813	otherwise you should rely on the texture_viewproj_matrix auto binding)
	1814	@note
	1815	Individual objects may also override the vertex program in
	1816	your default material if their materials include
	1817	shadow_caster_vertex_program_ref shadow_receiver_vertex_program_ref
	1818	entries, so if you use both make sure they are compatible.
	1819	@note
	1820	Only a single pass is allowed in your material, although multiple
	1821	techniques may be used for hardware fallback.
	1822	*/
	1823	virtual void setShadowTextureReceiverMaterial(const String& name);
	1824
	1825	/** Sets whether we should use an inifinite camera far plane
	1826	when rendering stencil shadows.
	1827	@remarks
	1828	Stencil shadow coherency is very reliant on the shadow volume
	1829	not being clipped by the far plane. If this clipping happens, you
	1830	get a kind of 'negative' shadow effect. The best way to achieve
	1831	coherency is to move the far plane of the camera out to infinity,
	1832	thus preventing the far plane from clipping the shadow volumes.
	1833	When combined with vertex program extrusion of the volume to
	1834	infinity, which Ogre does when available, this results in very
	1835	robust shadow volumes. For this reason, when you enable stencil
	1836	shadows, Ogre automatically changes your camera settings to
	1837	project to infinity if the card supports it. You can disable this
	1838	behaviour if you like by calling this method; although you can
	1839	never enable infinite projection if the card does not support it.
	1840	@par
	1841	If you disable infinite projection, or it is not available,
	1842	you need to be far more careful with your light attenuation /
	1843	directional light extrusion distances to avoid clipping artefacts
	1844	at the far plane.
	1845	@note
	1846	Recent cards will generally support infinite far plane projection.
	1847	However, we have found some cases where they do not, especially
	1848	on Direct3D. There is no standard capability we can check to
	1849	validate this, so we use some heuristics based on experience:
	1850	<UL>
	1851	<LI>OpenGL always seems to support it no matter what the card</LI>
	1852	<LI>Direct3D on non-vertex program capable systems (including
	1853	vertex program capable cards on Direct3D7) does not
	1854	support it</LI>
	1855	<LI>Direct3D on GeForce3 and GeForce4 Ti does not seem to support
	1856	infinite projection<LI>
	1857	</UL>
	1858	Therefore in the RenderSystem implementation, we may veto the use
	1859	of an infinite far plane based on these heuristics.
	1860	*/
	1861	virtual void setShadowUseInfiniteFarPlane(bool enable) {
	1862	mShadowUseInfiniteFarPlane = enable; }
	1863
	1864	/** Creates a StaticGeometry instance suitable for use with this
	1865	SceneManager.
	1866	@remarks
	1867	StaticGeometry is a way of batching up geometry into a more
	1868	efficient form at the expense of being able to move it. Please
	1869	read the StaticGeometry class documentation for full information.
	1870	@param name The name to give the new object
	1871	@returns The new StaticGeometry instance
	1872	*/
	1873	virtual StaticGeometry* createStaticGeometry(const String& name);
	1874	/** Retrieve a previously created StaticGeometry instance. */
	1875	virtual StaticGeometry* getStaticGeometry(const String& name) const;
	1876	/** Remove & destroy a StaticGeometry instance. */
	1877	virtual void removeStaticGeometry(StaticGeometry* geom);
	1878	/** Remove & destroy a StaticGeometry instance. */
	1879	virtual void removeStaticGeometry(const String& name);
	1880	/** Remove & destroy all StaticGeometry instances. */
	1881	virtual void removeAllStaticGeometry(void);
	1882
	1883
	1884	};
	1885
	1886	/** Default implementation of IntersectionSceneQuery. */
	1887	class _OgreExport DefaultIntersectionSceneQuery :
	1888	public IntersectionSceneQuery
	1889	{
	1890	public:
	1891	DefaultIntersectionSceneQuery(SceneManager* creator);
	1892	~DefaultIntersectionSceneQuery();
	1893
	1894	/** See IntersectionSceneQuery. */
	1895	void execute(IntersectionSceneQueryListener* listener);
	1896	};
	1897
	1898	/** Default implementation of RaySceneQuery. */
	1899	class _OgreExport DefaultRaySceneQuery : public RaySceneQuery
	1900	{
	1901	public:
	1902	DefaultRaySceneQuery(SceneManager* creator);
	1903	~DefaultRaySceneQuery();
	1904
	1905	/** See RayScenQuery. */
	1906	void execute(RaySceneQueryListener* listener);
	1907	};
	1908	/** Default implementation of SphereSceneQuery. */
	1909	class _OgreExport DefaultSphereSceneQuery : public SphereSceneQuery
	1910	{
	1911	public:
	1912	DefaultSphereSceneQuery(SceneManager* creator);
	1913	~DefaultSphereSceneQuery();
	1914
	1915	/** See SceneQuery. */
	1916	void execute(SceneQueryListener* listener);
	1917	};
	1918	/** Default implementation of PlaneBoundedVolumeListSceneQuery. */
	1919	class _OgreExport DefaultPlaneBoundedVolumeListSceneQuery : public PlaneBoundedVolumeListSceneQuery
	1920	{
	1921	public:
	1922	DefaultPlaneBoundedVolumeListSceneQuery(SceneManager* creator);
	1923	~DefaultPlaneBoundedVolumeListSceneQuery();
	1924
	1925	/** See SceneQuery. */
	1926	void execute(SceneQueryListener* listener);
	1927	};
	1928	/** Default implementation of AxisAlignedBoxSceneQuery. */
	1929	class _OgreExport DefaultAxisAlignedBoxSceneQuery : public AxisAlignedBoxSceneQuery
	1930	{
	1931	public:
	1932	DefaultAxisAlignedBoxSceneQuery(SceneManager* creator);
	1933	~DefaultAxisAlignedBoxSceneQuery();
	1934
	1935	/** See RayScenQuery. */
	1936	void execute(SceneQueryListener* listener);
	1937	};
	1938
	1939
	1940
	1941	} // Namespace
	1942
	1943
	1944
	1945	#endif

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source: OGRE/trunk/ogre_changes/OgreMain/include/OgreSceneManager.h @ 657

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