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source: GTP/trunk/Lib/Vis/OnlineCullingCHC/OGRE/include/OgreBiHierarchy.h @ 2349

Revision 2349, 21.9 KB checked in by vizrt_christian_seidl, 17 years ago (diff)

Added: BIHierarchy SceneManager?

BiTerrain? SceneManager?

Line
1	/*
2	-----------------------------------------------------------------------------
3	This source file is part of the GameTools Project
4	http://www.gametools.org
5
6	Author: Martin Szydlowski
7	-----------------------------------------------------------------------------
8	*/
9
10	#ifndef _OgreBiHierarchy_H__
11	#define _OgreBiHierarchy_H__
12
13	#define BIHNODE_CAST(a) (static_cast<BiHierarchy::Node>(a))
14	#define BIHBRANCH_CAST(a) (static_cast<BiHierarchy::Branch>(a))
15	#define BIHLEAF_CAST(a) (static_cast<BiHierarchy::Leaf>(a))
16	#define BIHNODEPTR_CAST(a) (static_cast<BiHierarchy::Node *>(a))
17	#define BIHBRANCHPTR_CAST(a) (static_cast<BiHierarchy::Branch *>(a))
18	#define BIHLEAFPTR_CAST(a) (static_cast<BiHierarchy::Leaf *>(a))
19
20	#define BiHierarchy_LOGNAME "BiHierarchyBuild.log"
21
22	#include <OgreAxisAlignedBox.h>
23	#include <OgreWireBoundingBox.h>
24	#include <OgrePlane.h>
25	#include <OgreVector3.h>
26
27	#include <OgreRoot.h>
28
29	#include <stack>
30
31	#include "OgreBiHierarchyCamera.h"
32	#include "HierarchyInterface.h"
33	#include "OgreKdTree.h"
34
35	namespace Ogre
36	{
37	class BiHierarchyCamera;
38	class BihRenderable;
39	struct BihSplitInfo;
40
41	class BihPlaneEvent
42	{
43	public:
44	enum Type
45	{
46	PET_END,
47	PET_ON,
48	PET_START
49	};
50
51	enum Dimension
52	{
53	PED_X,
54	PED_Y,
55	PED_Z
56	};
57
58	enum Side
59	{
60	PES_LEFT = 0x01,
61	PES_RIGHT = 0x02,
62	PES_BOTH = PES_LEFT \| PES_RIGHT
63	};
64
65	BihPlaneEvent(): mRenderable(0), mPosition(Vector3()), mDimension(PED_X), mType(PET_ON)
66	{ };
67
68	BihPlaneEvent(BihRenderable *rend, const Vector3& pos, BihPlaneEvent::Dimension dim, BihPlaneEvent::Type type):
69	mRenderable(rend), mPosition(pos), mDimension(dim), mType(type)
70	{ };
71
72	~BihPlaneEvent() {};
73
74	// the less operator for plane events
75	// first sort by position, then by dimension and finally by type
76	bool operator < (const BihPlaneEvent& e) const
77	{
78	if(mPosition[mDimension] < e.mPosition[e.mDimension])
79	{
80	return true;
81	}
82
83	if(mPosition[mDimension] == e.mPosition[e.mDimension])
84	{
85	if (mDimension < e.mDimension)
86	{
87	return true;
88	}
89	if (mDimension == e.mDimension)
90	{
91	if (mType < e.mType)
92	{
93	return true;
94	}
95	}
96	}
97
98	return false;
99	};
100
101	// the equals operator for tree events
102	bool operator == (const BihPlaneEvent& e) const
103	{
104	return (mPosition[mDimension] == e.mPosition[e.mDimension]) &&
105	(mDimension == e.mDimension) &&
106	(mType == e.mType);
107	};
108
109	bool equalsType(const BihPlaneEvent& e, BihPlaneEvent::Type t)
110	{
111	return (mPosition[mDimension] == e.mPosition[e.mDimension]) &&
112	(mDimension == e.mDimension) &&
113	(mType == t);
114	};
115
116	void classify(const BihPlaneEvent& e, BihPlaneEvent::Side side, bool absolute);
117
118	BihPlaneEvent clip(AxisAlignedBox& box, BihPlaneEvent::Dimension dim);
119
120	Plane * getSplitPlane() const
121	{
122	Vector3 normal(0,0,0);
123	normal[mDimension] = 1;
124	return new Plane(normal, mPosition);
125	}
126
127	BihRenderable * getRenderable() const //??
128	{
129	return mRenderable;
130	};
131
132	BihPlaneEvent::Dimension getDimension() const //??
133	{
134	return mDimension;
135	};
136
137	// DEBUG
138	String print();
139	protected:
140	// event info
141	BihRenderable * mRenderable;
142	Vector3 mPosition;
143	BihPlaneEvent::Dimension mDimension;
144	BihPlaneEvent::Type mType;
145
146	// ------------------------------------------------------------------------------//
147	// functions to determine the cost of splitting the node parent with the plane
148	// represented by this event
149	// TODO discuss if these functions really belong here, OO & SE - wise
150	// pros: convenient, don't have to pass internal data to the outside
151	// cons: BihSplitInfo ...
152	public:
153	// compute "global" surface area heuristic (SAH) for the plane represented by this event
154	// use only with priority queue build method
155	void pqSAH(Real globalSA, Real parentSA, int nLeft, int nPlane, int nRight, AxisAlignedBox& parentBox, BihSplitInfo& split);
156	static Real pqSplitCost(Real p, Real pl, Real pr, int nLeft, int nRight, Real mu);
157
158	// compute the surface area heuristic (SAH) for the plane represented by this event
159	void SAH(const AxisAlignedBox& parent, int nLeft, int nPlane, int nRight, BihSplitInfo& split);
160	void SAH(const AxisAlignedBox& parent, int nLeft, int nPlane, int nRight, BihSplitInfo& split,AxisAlignedBox left,AxisAlignedBox right);
161
162	// the variables determining the cost of a branch traversal (KT) and a leaf intersection (KI)
163	static Real KT;
164	static Real KI;
165	// helper functions
166	static Real splitCost(Real pl, Real pr, int nLeft, int nRight);
167	static Real splitCost(Real pl, Real pr, int nLeft, int nRight, Real mu);
168	static Real surfaceArea(const AxisAlignedBox& box);
169	static Real lookupPenalty(Real p);
170	protected:
171	Real splitBox(const AxisAlignedBox& parent, AxisAlignedBox& left, AxisAlignedBox& right);
172	};
173
174	// Holds all the important information on a split
175	struct BihSplitInfo
176	{
177	AxisAlignedBox bleft;
178	AxisAlignedBox bright;
179	int nleft;
180	int nright;
181	Real cost;
182	BihPlaneEvent::Side side;
183	BihPlaneEvent event;
184
185	// DEBUG
186	String print();
187	};
188
189	typedef std::list<BihRenderable *> BihRenderableList;
190	typedef std::list<BihPlaneEvent> BihPlaneEventList;
191
192	class BiHierarchy
193	{
194	protected:
195	class Branch;
196	class Leaf;
197
198	class Node
199	{
200	public:
201	Node(BiHierarchy * owner, int level, AxisAlignedBox& aabb, Branch * parent):
202	mOwner(owner),
203	mLevel(level),
204	mAABB(aabb),
205	mParent(parent),
206	mWBB(0),
207	m_iSide(0)
208	{ };
209
210	virtual ~Node()
211	{
212	delete mWBB;
213	};
214
215	virtual bool isLeaf() const = 0;
216	virtual bool isEmpty() const = 0;
217	virtual bool hasGeometry() const = 0;
218
219	virtual void mergeLeaves(std::set<Leaf *>& leaves) = 0;
220
221	// Gets this node's parent (NULL if this is the root).
222	BiHierarchy::Node *getParent(void) const { return mParent; };
223
224	// Gets the nodes left & right child nodes, or NULL if not present or node is leaf
225	virtual BiHierarchy::Node *getLeftChild(void) const = 0;
226	virtual BiHierarchy::Node *getRightChild(void) const = 0;
227
228	// add contained objects to render queue
229	virtual void queueVisibleObjects(unsigned long currentFrame,
230	Camera* cam, RenderQueue* queue, bool onlyShadowCasters, bool showBoxes, bool fullVis = false) = 0;
231
232	// add contained geometry (Entities) to list
233	virtual void getGeometryList(GeometryVector *geometryList) = 0;
234
235	// create (when necessary), setup and return wire bounding box representing the node
236	WireBoundingBox * getWireBoundingBox()
237	{
238	if (mWBB == 0)
239	mWBB = new WireBoundingBox();
240
241	if (mOwner->getShowNodes())
242	mWBB->setupBoundingBox(mAABB);
243	else
244	mWBB->setupBoundingBox(mWorldAABB);
245
246	// cse
247	if (mOwner->getHiLiteLevel() == mLevel)
248	switch (m_iSide)
249	{
250	case 0:
251	{
252	mWBB->setMaterial("BiHierarchy/BoxViz"); break;
253	}
254	case 1: {
255	mWBB->setMaterial("BiHierarchy/BoxLeft"); break;
256	}
257	default:
258	{
259	mWBB->setMaterial("BiHierarchy/BoxRight");
260	}
261	}
262	else if (mOwner->getHiLiteLevel() == (mLevel+1))
263	{
264
265	mWBB->setMaterial("BiHierarchy/BoxViz");
266
267
268	} else
269	{
270	switch (m_iSide)
271	{
272	case 0:
273	{
274	mWBB->setMaterial("BiHierarchy/BoxViz"); break;
275	}
276	case 1: {
277	mWBB->setMaterial("BiHierarchy/BoxLeftDark"); break;
278	}
279	default:
280	{
281	mWBB->setMaterial("BiHierarchy/BoxRightDark");
282	}
283	}
284
285
286	}
287
288	return mWBB;
289	}
290
291	// returns the level the node is on
292	int getLevel(void) const { return mLevel; };
293
294	void SetToLeft() {
295	m_iSide=1;
296	};
297	void SetToRight() {
298	m_iSide=2;
299	};
300	int GetSide() { return m_iSide; };
301
302
303	// functions for the CHC hierarchy interface
304
305	/** Returns last visited frame id. */
306	unsigned int lastVisited(void) { return mLastVisited; };
307	/** Set to current frame id.
308	@param current frame id.
309	*/
310	void setLastVisited(unsigned int frameid) { mLastVisited = frameid; };
311	/** Makes this octree become visible / invisble.
312	@param visible Whether this node is to be made visible or invisible
313	*/
314	void setNodeVisible(bool visible) { mVisible = visible; };
315	/** Returns true if this node is marked visible, false otherwise.
316	*/
317	bool isNodeVisible(void) { return mVisible; };
318	/** Frame id when this octree was last rendered.
319	@return last rendered frame id
320	*/
321	unsigned int lastRendered(void) { return mLastRendered; };
322	/** Sets frame id when this octree was last rendered.
323	@param last rendered frame id
324	*/
325	void setLastRendered(unsigned int frameid) { mLastRendered = frameid; };
326	/** Returns real extent of the BiHierarchy, i.e., the merged extent of the bounding boxes.
327	*/
328	AxisAlignedBox _getWorldAABB(void) const { return mAABB; };
329	/** Updates bound of the real aabb of BiHierarchy
330	*/
331	virtual void _updateBounds(bool recurse = true) = 0;
332
333	/** bounding box of the node
334	*/
335	AxisAlignedBox mAABB;
336
337	/** bounding box of all objects inside the node
338	*/
339	AxisAlignedBox mWorldAABB;
340
341
342	protected:
343	BiHierarchy * mOwner;
344	Branch * mParent;
345	int mLevel;
346	int m_iSide; // defines the side ( left / right ) for better debugging.
347
348	WireBoundingBox * mWBB;
349
350	// for the CHC hierarchy interface
351	unsigned int mLastRendered;
352	unsigned int mLastVisited;
353	bool mVisible;
354	};
355
356	class Branch : public Node
357	{
358	public:
359	Branch(BiHierarchy * owner, int level, AxisAlignedBox& aabb, Branch * parent,
360	Plane * splitplane, BihPlaneEvent::Side side):
361	Node(owner, level, aabb, parent),
362	mSplitPlane(splitplane),
363	mLeft(0),
364	mRight(0),
365	mPlaneSide(side)
366	{ };
367
368	virtual ~Branch()
369	{
370	delete mLeft;
371	delete mRight;
372	delete mSplitPlane;
373	};
374
375	// a branch is not a leaf
376	virtual bool isLeaf() const { return false; };
377
378	// s branch is empty when it does not have children
379	virtual bool isEmpty() const { return (mLeft == 0 && mRight == 0); }
380
381	// a branch never has geometry
382	virtual bool hasGeometry() const { return false; };
383
384	virtual void mergeLeaves(std::set<Leaf *>& leaves)
385	{
386	for (std::set<Leaf *>::iterator it = mLeaves.begin(); it != mLeaves.end(); it++)
387	leaves.insert(*it);
388	}
389
390	// a branch should have at least one child
391	virtual BiHierarchy::Node * getLeftChild() const { return mLeft; };
392	virtual BiHierarchy::Node * getRightChild() const { return mRight; };
393
394	virtual void queueVisibleObjects(unsigned long currentFrame,
395	Camera* cam, RenderQueue* queue, bool onlyShadowCasters, bool showBoxes, bool fullVis = false)
396	{
397	// cse
398	//showBoxes=true;
399	if (showBoxes)
400	{
401	if (mLevel == mOwner->getHiLiteLevel()\|\| (mLevel-1) == mOwner->getHiLiteLevel() \|\| mOwner->getShowAllBoxes())
402	queue->addRenderable(getWireBoundingBox());
403	/*
404	if (mLevel == mOwner->getHiLiteLevel() \|\| mOwner->getShowAllBoxes())
405	queue->addRenderable(getWireBoundingBox());
406	*/
407	}
408
409	if (fullVis)
410	for (std::set<Leaf *>::iterator it = mLeaves.begin(); it != mLeaves.end(); it ++)
411	(*it)->queueVisibleObjects(currentFrame, cam, queue, onlyShadowCasters, showBoxes, fullVis);
412	}
413
414	// a branch has no geometry, do nothing
415	virtual void getGeometryList(GeometryVector *geometryList) { }
416
417	// branches do not posses geometry => just merge child aabbs
418	virtual void _updateBounds(bool recurse = true)
419	{
420	// reset box
421	mWorldAABB.setNull();
422
423	// merge box & leaves
424	if (mLeft)
425	{
426	mWorldAABB.merge(mLeft->mWorldAABB);
427	mLeft->mergeLeaves(mLeaves);
428	}
429	if (mRight)
430	{
431	mWorldAABB.merge(mRight->mWorldAABB);
432	mRight->mergeLeaves(mLeaves);
433	}
434
435	// update parent recursively
436	if (recurse && mParent)
437	mParent->_updateBounds(recurse);
438	}
439
440	Node * mLeft;
441	Node * mRight;
442	Plane * mSplitPlane;
443	BihPlaneEvent::Side mPlaneSide;
444	protected:
445	std::set<Leaf *> mLeaves;
446	};
447
448	class Leaf : public Node
449	{
450	public:
451	Leaf(BiHierarchy * owner, int level, AxisAlignedBox& aabb, Branch *parent):
452	Node(owner, level, aabb, parent)
453	{};
454
455	virtual ~Leaf();
456
457	// a leaf is a leaf, dammit
458	virtual bool isLeaf() const { return true; }
459
460	// a leaf is empty when it does not posses renderables
461	virtual bool isEmpty() const { return mBihRenderables.empty(); }
462
463	// a leaf has geometry when it has renderables
464	virtual bool hasGeometry() const { return !mBihRenderables.empty(); }
465
466	// a leaf adds itself to the leaf set
467	virtual void mergeLeaves(std::set<Leaf *>& leaves) { leaves.insert(this); }
468
469	// a leaf never has children
470	virtual BiHierarchy::Node * getLeftChild() const { return 0; };
471	virtual BiHierarchy::Node * getRightChild() const { return 0; };
472
473	virtual void queueVisibleObjects(unsigned long currentFrame,
474	Camera* cam, RenderQueue* queue, bool onlyShadowCasters, bool showBoxes, bool fullVis = false);
475
476	virtual void getGeometryList(GeometryVector *geometryList);
477
478	// update the world aabb based on the contained geometry
479	virtual void _updateBounds(bool recurse = true);
480
481	virtual void remove(BihRenderable * rend)
482	{
483	mBihRenderables.remove(rend);
484	//mBihRenderables.erase(find(mBihRenderables.begin(), mBihRenderables.end(), rend));
485	};
486
487	virtual void insert(BihRenderable * rend)
488	{
489	mBihRenderables.push_back(rend);
490	};
491
492	BihRenderableList mBihRenderables;
493	};
494
495	struct BihSubdivisionCandidate
496	{
497	BihSubdivisionCandidate(BihPlaneEventList * e, int n, AxisAlignedBox& a,
498	BiHierarchy::Branch * p, Real c, Real d, BihSplitInfo * b, BihPlaneEvent::Side s):
499	events(e), nObjects(n), aabb(a), parent(p), cost(c), decrease(d), best(b), side(s)
500	{ };
501
502	bool operator < (const BihSubdivisionCandidate& rhs) const
503	{
504	return decrease < rhs.decrease;
505	};
506
507	void operator = (const BihSubdivisionCandidate& rhs)
508	{
509	decrease = rhs.decrease;
510	cost = rhs.cost;
511	nObjects = rhs.nObjects;
512	side = rhs.side;
513	aabb = rhs.aabb;
514	events = rhs.events;
515	parent = rhs.parent;
516	best = rhs.best;
517	};
518
519	// DEBUG
520	String print();
521
522	Real decrease;
523	Real cost;
524	int nObjects;
525	BihPlaneEvent::Side side;
526	AxisAlignedBox aabb;
527	BihPlaneEventList *events;
528	BiHierarchy::Branch * parent;
529	BihSplitInfo * best;
530	};
531
532	// typedef std::stack<BihSubdivisionCandidate> SplitCandidatePQ;
533	typedef std::priority_queue<BihSubdivisionCandidate> SplitCandidatePQ;
534
535	// nodestack for the stack-based rendering function
536	typedef std::stack<BiHierarchy::Node *> NodeStack;
537	public:
538	friend class BiHierarchyInterface;
539
540	typedef BiHierarchy::Node * NodePtr;
541	typedef BiHierarchy::Branch * BranchPtr;
542	typedef BiHierarchy::Leaf * LeafPtr;
543
544	typedef std::list<NodePtr> NodeList;
545	typedef std::set<LeafPtr> LeafSet;
546
547	struct TreeStats
548	{
549	unsigned int mNumNodes;
550	unsigned int mNumLeaves;
551	unsigned int mNumSceneNodes;
552
553	void clear(void)
554	{
555	mNumNodes = 0;
556	mNumLeaves = 0;
557	mNumSceneNodes = 0;
558	}
559	};
560
561	struct FrameStats
562	{
563	unsigned int mTraversedNodes;
564	unsigned int mRenderedNodes;
565	unsigned int mFrustumCulledNodes;
566
567	void clear(void)
568	{
569	mTraversedNodes = 0;
570	mRenderedNodes = 0;
571	mFrustumCulledNodes = 0;
572	}
573	};
574
575	enum RenderMethod
576	{
577	BIHRM_INTERNAL,
578	BIHRM_GTP_VFC,
579	BIHRM_GTP_SWC,
580	BIHRM_GTP_CHC,
581	// invalid modes, just for convenience
582	BIHRM_SIZE,
583	BIHRM_NOTSET
584	};
585
586	enum BuildMethod
587	{
588	BIHBM_RECURSIVE,
589	BIHBM_PRIORITYQUEUE,
590	// invalid modes, just for convenience
591	BIHBM_SIZE,
592	BIHBM_NOTSET
593	};
594
595	enum PlaneAlorithm
596	{
597	BIHAL_SAH,
598	BIHAL_MID
599	};
600
601
602	const static int HILITE_OFF = -1;
603
604	BiHierarchy(int maxdepth, BuildMethod bm);
605	BiHierarchy(int maxdepth, BuildMethod bm, int hilite, bool allboxes, bool shownodes);
606	virtual ~BiHierarchy();
607
608	// DEBUG
609	void dump(void);
610	Real calcCost(void);
611
612	// sets the level to highlight or turns it off (when hilite < 0)
613	inline void setHiLiteLevel(int hilite) { mHiLiteLevel = hilite; };
614	inline int getHiLiteLevel(void) { return mHiLiteLevel; };
615
616	// toggles displaying the BiHierarchy boxes
617	inline void setShowAllBoxes(bool show) { mShowAllBoxes = show; };
618	inline bool getShowAllBoxes(void) { return mShowAllBoxes; };
619
620	// toggles between displaying the bounding box of the node and
621	// the box of the contained scene nodes
622	inline void setShowNodes(bool show = true) { mShowNodes = show; };
623	inline bool getShowNodes(void) { return mShowNodes; };
624
625	// changes vis mode (simple/enhanced with NONE/PART/FULL vis)
626	void setEnhancedVis(bool enh);
627	bool getEnhancedVis(void);
628
629	NodePtr getRoot(void) const { return mBihRoot; };
630
631	// insert a new scene node into an existing Bihierarchy
632	void insert(BihRenderable * rend);
633	// remove a scene node from the tree
634	void remove(BihRenderable * rend);
635	// function to initialize a kd-tree based on the contents of the scene
636	void build(BihRenderable * sceneRoot);
637
638	// test visibility of objects and add to render queue
639	void queueVisibleObjects(BiHierarchyCamera* cam, RenderQueue* queue, bool onlyShadowCasters,
640	bool showBoxes, BiHierarchy::NodeList& visibleNodes);
641
642	// find visible nodes & place in list
643	//void findVisibleNodes(NodeList& visibleNodes, Camera * cam);
644
645	/** Recurses the BiHierarchy, adding any nodes intersecting with the
646	box/sphere/volume/ray into the given list.
647	It ignores the exclude scene node.
648	*/
649	void findNodesIn(const AxisAlignedBox &box, std::list<SceneNode > &list, SceneNode exclude = 0);
650	void findNodesIn(const Sphere &sphere, std::list<SceneNode > &list, SceneNode exclude = 0);
651	void findNodesIn(const PlaneBoundedVolume &volume, std::list<SceneNode > &list, SceneNode exclude = 0);
652	void findNodesIn(const Ray &ray, std::list<SceneNode > &list, SceneNode exclude = 0);
653
654	// self-explanatory ...
655	int getMaxDepth(void) { return mMaxDepth; }
656	const TreeStats& getTreeStats(void) const { return mTreeStats; }
657	const FrameStats& getFramesStats(void) const { return mFrameStats; }
658	AxisAlignedBox getBox(void) { if (mBihRoot) return mBihRoot->mAABB; else return AxisAlignedBox(); }
659	void setBuildMethod(BuildMethod bm) { mBuildMethod = bm; }
660	protected:
661	// init materials, logs and stuff
662	void init();
663	// recursive insert funciton
664	void recInsert(BiHierarchy::Node * node, BihRenderable * rend);
665	// helper functions for insert
666	void recInsertNew(BiHierarchy::Branch * parent, BihPlaneEvent::Side side, BihRenderable * rend);
667	void splitBox(const BiHierarchy::Branch& parent, AxisAlignedBox& left, AxisAlignedBox& right);
668	void rebuildSubtree(BiHierarchy::Node * node, BihRenderable * rend);
669	// build scene from a list of nodes rather than a hierarchy
670	BiHierarchy::Node * buildFromList(BihRenderableList& nodelist, BiHierarchy::Branch * parent, AxisAlignedBox& aabb);
671	void addRendToList(BiHierarchy::Node * node, BihRenderableList& nodelist);
672
673	// recursively delete empty nodes
674	void recDelete(BiHierarchy::Node * node);
675
676	// find the best plane for node division
677	BihSplitInfo * pqFindPlane(BihPlaneEventList * events, int nObjects, AxisAlignedBox& aabb, Real globalSA);
678
679	// priority queue based build function
680	BiHierarchy::Node * pqBuild(BihPlaneEventList& events, int nObjects, AxisAlignedBox& aabb, BiHierarchy::Branch * parent);
681	// recursive build function
682	BiHierarchy::Node * recBuild(BihPlaneEventList& events, int nObjects, AxisAlignedBox& aabb, BiHierarchy::Branch * parent);
683
684	// recursive rendering function
685	void recQueueVisibleObjects(BiHierarchy::Node * node, unsigned long currentFrame, BiHierarchyCamera* cam,
686	RenderQueue* queue, bool onlyShadowCasters, bool showBoxes,
687	BiHierarchy::NodeList& visibleNodes, bool fullVis = false);
688
689	// recursively find visible nodes
690	//void recFindVisibleNodes(BiHierarchy::Node * node, NodeList& visibleNodes, Camera * cam);
691
692	/** Recurses the BiHierarchy, adding any nodes intersecting with the
693	box/sphere/volume/ray into the given list.
694	It ignores the exclude scene node.
695	*/
696	void recFindNodesIn(const AxisAlignedBox &box, std::list<SceneNode > &list, SceneNode exclude, Node * node, bool full = false);
697	void recFindNodesIn(const Sphere &sphere, std::list<SceneNode > &list, SceneNode exclude, Node * node, bool full = false);
698	void recFindNodesIn(const PlaneBoundedVolume &volume, std::list<SceneNode > &list, SceneNode exclude, Node * node, bool full = false);
699	void recFindNodesIn(const Ray &ray, std::list<SceneNode > &list, SceneNode exclude, Node * node, bool full = false);
700
701	// the root node of the BiHierarchy
702	BiHierarchy::Node * mBihRoot;
703	// Maximum depth of the tree
704	int mMaxDepth;
705
706	// how to build the tree
707	BuildMethod mBuildMethod;
708
709	// what algorithm will be used to find the split plane
710	PlaneAlorithm mAlgorithm;
711
712	// logfile for tree creation
713	Log * mBuildLog;
714
715	// statistical information on the tree
716	TreeStats mTreeStats;
717
718	// statistical info on a single rendered frame
719	FrameStats mFrameStats;
720
721	/ Visualization flags /
722	// show/highlight selected level in BiHierarchy
723	int mHiLiteLevel;
724	// show whole kd-tree
725	bool mShowAllBoxes;
726	// show node or object boxes
727	bool mShowNodes;
728
729	// function pointer to the getVisibility function
730	// allows choosing between regular vis (NONE/PART, same es isVisible)
731	// and enhaced vis (NONE/PART/FULL) for early traversal abort
732	BiHierarchyCamera::NodeVisibility (BiHierarchyCamera::*getVisibility)(const AxisAlignedBox& box) const;
733
734	// DEBUG
735	void BiHierarchy::dump(BiHierarchy::Node * node);
736	Real BiHierarchy::calcCost(BiHierarchy::Node * node, Real vs);
737	}; // class BiHierarchy
738
739	} // namespace Ogre
740
741	#endif // _OgreBiHierarchy_H__

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