1 |
|
---|
2 | // ================================================================
|
---|
3 | // $Id: lsds_kdtree.cpp,v 1.18 2005/04/16 09:34:21 bittner Exp $
|
---|
4 | // ****************************************************************
|
---|
5 | /**
|
---|
6 | The KD tree based LSDS
|
---|
7 | */
|
---|
8 | // Initial coding by
|
---|
9 | /**
|
---|
10 | @author Jiri Bittner
|
---|
11 | */
|
---|
12 |
|
---|
13 | // Standard headers
|
---|
14 | #include <stack>
|
---|
15 | #include <queue>
|
---|
16 | #include <algorithm>
|
---|
17 | #include <fstream>
|
---|
18 | #include <string>
|
---|
19 |
|
---|
20 | #include "VspKdTree.h"
|
---|
21 |
|
---|
22 | #include "Environment.h"
|
---|
23 | #include "VssRay.h"
|
---|
24 | #include "Intersectable.h"
|
---|
25 | #include "Ray.h"
|
---|
26 | #include "RayInfo.h"
|
---|
27 | #include "ViewCellsManager.h"
|
---|
28 | #include "ViewCell.h"
|
---|
29 |
|
---|
30 | // Static variables
|
---|
31 | int VspKdTreeLeaf::mailID = 0;
|
---|
32 |
|
---|
33 | #define USE_FIXEDPOINT_T 0
|
---|
34 |
|
---|
35 | /// Adds object to the pvs of the front and back node
|
---|
36 | inline void AddObject2Pvs(Intersectable *object,
|
---|
37 | const int side,
|
---|
38 | int &pvsBack,
|
---|
39 | int &pvsFront)
|
---|
40 | {
|
---|
41 | if (!object)
|
---|
42 | return;
|
---|
43 |
|
---|
44 | if (side <= 0)
|
---|
45 | {
|
---|
46 | if (!object->Mailed() && !object->Mailed(2))
|
---|
47 | {
|
---|
48 | ++ pvsBack;
|
---|
49 |
|
---|
50 | if (object->Mailed(1))
|
---|
51 | object->Mail(2);
|
---|
52 | else
|
---|
53 | object->Mail();
|
---|
54 | }
|
---|
55 | }
|
---|
56 |
|
---|
57 | if (side >= 0)
|
---|
58 | {
|
---|
59 | if (!object->Mailed(1) && !object->Mailed(2))
|
---|
60 | {
|
---|
61 | ++ pvsFront;
|
---|
62 |
|
---|
63 | if (object->Mailed())
|
---|
64 | object->Mail(2);
|
---|
65 | else
|
---|
66 | object->Mail(1);
|
---|
67 | }
|
---|
68 | }
|
---|
69 | }
|
---|
70 |
|
---|
71 | /**************************************************************/
|
---|
72 | /* class VspKdTreeNode implementation */
|
---|
73 | /**************************************************************/
|
---|
74 |
|
---|
75 | // Inline constructor
|
---|
76 | VspKdTreeNode::VspKdTreeNode(VspKdTreeInterior *p):
|
---|
77 | mParent(p), mAxis(-1), mDepth(p ? p->mDepth + 1 : 0)
|
---|
78 | {}
|
---|
79 |
|
---|
80 | VspKdTreeNode::~VspKdTreeNode()
|
---|
81 | {};
|
---|
82 |
|
---|
83 | inline VspKdTreeInterior *VspKdTreeNode::GetParent() const
|
---|
84 | {
|
---|
85 | return mParent;
|
---|
86 | }
|
---|
87 |
|
---|
88 | inline void VspKdTreeNode::SetParent(VspKdTreeInterior *p)
|
---|
89 | {
|
---|
90 | mParent = p;
|
---|
91 | }
|
---|
92 |
|
---|
93 | bool VspKdTreeNode::IsLeaf() const
|
---|
94 | {
|
---|
95 | return mAxis == -1;
|
---|
96 | }
|
---|
97 |
|
---|
98 | int VspKdTreeNode::GetAccessTime()
|
---|
99 | {
|
---|
100 | return 0x7FFFFFF;
|
---|
101 | }
|
---|
102 |
|
---|
103 | /**************************************************************/
|
---|
104 | /* VspKdTreeInterior implementation */
|
---|
105 | /**************************************************************/
|
---|
106 |
|
---|
107 | VspKdTreeInterior::VspKdTreeInterior(VspKdTreeInterior *p):
|
---|
108 | VspKdTreeNode(p), mBack(NULL), mFront(NULL), mAccesses(0), mLastAccessTime(-1)
|
---|
109 | {
|
---|
110 | }
|
---|
111 |
|
---|
112 | int VspKdTreeInterior::GetAccessTime()
|
---|
113 | {
|
---|
114 | return mLastAccessTime;
|
---|
115 | }
|
---|
116 |
|
---|
117 | void VspKdTreeInterior::SetupChildLinks(VspKdTreeNode *b, VspKdTreeNode *f)
|
---|
118 | {
|
---|
119 | mBack = b;
|
---|
120 | mFront = f;
|
---|
121 | b->SetParent(this);
|
---|
122 | f->SetParent(this);
|
---|
123 | }
|
---|
124 |
|
---|
125 | void VspKdTreeInterior::ReplaceChildLink(VspKdTreeNode *oldChild,
|
---|
126 | VspKdTreeNode *newChild)
|
---|
127 | {
|
---|
128 | if (mBack == oldChild)
|
---|
129 | mBack = newChild;
|
---|
130 | else
|
---|
131 | mFront = newChild;
|
---|
132 | }
|
---|
133 |
|
---|
134 | int VspKdTreeInterior::Type() const
|
---|
135 | {
|
---|
136 | return EInterior;
|
---|
137 | }
|
---|
138 |
|
---|
139 | VspKdTreeInterior::~VspKdTreeInterior()
|
---|
140 | {
|
---|
141 | DEL_PTR(mBack);
|
---|
142 | DEL_PTR(mFront);
|
---|
143 | }
|
---|
144 |
|
---|
145 | void VspKdTreeInterior::Print(ostream &s) const
|
---|
146 | {
|
---|
147 | switch (mAxis)
|
---|
148 | {
|
---|
149 | case 0:
|
---|
150 | s << "x "; break;
|
---|
151 | case 1:
|
---|
152 | s << "y "; break;
|
---|
153 | case 2:
|
---|
154 | s << "z "; break;
|
---|
155 | }
|
---|
156 |
|
---|
157 | s << mPosition << " ";
|
---|
158 |
|
---|
159 | mBack->Print(s);
|
---|
160 | mFront->Print(s);
|
---|
161 | }
|
---|
162 |
|
---|
163 | int VspKdTreeInterior::ComputeRayIntersection(const RayInfo &rayData, float &t)
|
---|
164 | {
|
---|
165 | return rayData.ComputeRayIntersection(mAxis, mPosition, t);
|
---|
166 | }
|
---|
167 |
|
---|
168 | VspKdTreeNode *VspKdTreeInterior::GetBack() const
|
---|
169 | {
|
---|
170 | return mBack;
|
---|
171 | }
|
---|
172 |
|
---|
173 | VspKdTreeNode *VspKdTreeInterior::GetFront() const
|
---|
174 | {
|
---|
175 | return mFront;
|
---|
176 | }
|
---|
177 |
|
---|
178 |
|
---|
179 | /**************************************************************/
|
---|
180 | /* class VspKdTreeLeaf implementation */
|
---|
181 | /**************************************************************/
|
---|
182 | VspKdTreeLeaf::VspKdTreeLeaf(VspKdTreeInterior *p, const int nRays):
|
---|
183 | VspKdTreeNode(p), mRays(), mPvsSize(0), mValidPvs(false), mViewCell(NULL)
|
---|
184 | {
|
---|
185 | mRays.reserve(nRays);
|
---|
186 | }
|
---|
187 |
|
---|
188 | VspKdTreeLeaf::~VspKdTreeLeaf()
|
---|
189 | {}
|
---|
190 |
|
---|
191 | int VspKdTreeLeaf::Type() const
|
---|
192 | {
|
---|
193 | return ELeaf;
|
---|
194 | }
|
---|
195 |
|
---|
196 | void VspKdTreeLeaf::Print(ostream &s) const
|
---|
197 | {
|
---|
198 | s << endl << "L: r = " << (int)mRays.size() << endl;
|
---|
199 | };
|
---|
200 |
|
---|
201 | void VspKdTreeLeaf::AddRay(const RayInfo &data)
|
---|
202 | {
|
---|
203 | mValidPvs = false;
|
---|
204 | mRays.push_back(data);
|
---|
205 | data.mRay->Ref();
|
---|
206 | }
|
---|
207 |
|
---|
208 | int VspKdTreeLeaf::GetPvsSize() const
|
---|
209 | {
|
---|
210 | return mPvsSize;
|
---|
211 | }
|
---|
212 |
|
---|
213 | void VspKdTreeLeaf::SetPvsSize(const int s)
|
---|
214 | {
|
---|
215 | mPvsSize = s;
|
---|
216 | }
|
---|
217 |
|
---|
218 | void VspKdTreeLeaf::Mail()
|
---|
219 | {
|
---|
220 | mMailbox = mailID;
|
---|
221 | }
|
---|
222 |
|
---|
223 | void VspKdTreeLeaf::NewMail()
|
---|
224 | {
|
---|
225 | ++ mailID;
|
---|
226 | }
|
---|
227 |
|
---|
228 | bool VspKdTreeLeaf::Mailed() const
|
---|
229 | {
|
---|
230 | return mMailbox == mailID;
|
---|
231 | }
|
---|
232 |
|
---|
233 | bool VspKdTreeLeaf::Mailed(const int mail)
|
---|
234 | {
|
---|
235 | return mMailbox >= mailID + mail;
|
---|
236 | }
|
---|
237 |
|
---|
238 | float VspKdTreeLeaf::GetAvgRayContribution() const
|
---|
239 | {
|
---|
240 | return GetPvsSize() / ((float)mRays.size() + Limits::Small);
|
---|
241 | }
|
---|
242 |
|
---|
243 | float VspKdTreeLeaf::GetSqrRayContribution() const
|
---|
244 | {
|
---|
245 | return sqr(GetAvgRayContribution());
|
---|
246 | }
|
---|
247 |
|
---|
248 | RayInfoContainer &VspKdTreeLeaf::GetRays()
|
---|
249 | {
|
---|
250 | return mRays;
|
---|
251 | }
|
---|
252 |
|
---|
253 | void VspKdTreeLeaf::ExtractPvs(ObjectContainer &objects) const
|
---|
254 | {
|
---|
255 | RayInfoContainer::const_iterator it, it_end = mRays.end();
|
---|
256 |
|
---|
257 | for (it = mRays.begin(); it != it_end; ++ it)
|
---|
258 | {
|
---|
259 | if ((*it).mRay->mTerminationObject)
|
---|
260 | objects.push_back((*it).mRay->mTerminationObject);
|
---|
261 | if ((*it).mRay->mOriginObject)
|
---|
262 | objects.push_back((*it).mRay->mOriginObject);
|
---|
263 | }
|
---|
264 | }
|
---|
265 |
|
---|
266 | void VspKdTreeLeaf::GetRays(VssRayContainer &rays)
|
---|
267 | {
|
---|
268 | RayInfoContainer::const_iterator it, it_end = mRays.end();
|
---|
269 |
|
---|
270 | for (it = mRays.begin(); it != mRays.end(); ++ it)
|
---|
271 | rays.push_back((*it).mRay);
|
---|
272 | }
|
---|
273 |
|
---|
274 | ViewCell *VspKdTreeLeaf::GetViewCell()
|
---|
275 | {
|
---|
276 | return mViewCell;
|
---|
277 | }
|
---|
278 |
|
---|
279 | /*********************************************************/
|
---|
280 | /* class VspKdTree implementation */
|
---|
281 | /*********************************************************/
|
---|
282 |
|
---|
283 |
|
---|
284 | VspKdTree::VspKdTree(): mOnlyDrivingAxis(true)
|
---|
285 | {
|
---|
286 | environment->GetIntValue("VspKdTree.Termination.maxDepth", mTermMaxDepth);
|
---|
287 | environment->GetIntValue("VspKdTree.Termination.minPvs", mTermMinPvs);
|
---|
288 | environment->GetIntValue("VspKdTree.Termination.minRays", mTermMinRays);
|
---|
289 | environment->GetFloatValue("VspKdTree.Termination.maxRayContribution", mTermMaxRayContribution);
|
---|
290 | environment->GetFloatValue("VspKdTree.Termination.maxCostRatio", mTermMaxCostRatio);
|
---|
291 | environment->GetFloatValue("VspKdTree.Termination.minSize", mTermMinSize);
|
---|
292 |
|
---|
293 | mTermMinSize = sqr(mTermMinSize);
|
---|
294 |
|
---|
295 | environment->GetFloatValue("VspKdTree.epsilon", mEpsilon);
|
---|
296 | environment->GetFloatValue("VspKdTree.ct_div_ci", mCtDivCi);
|
---|
297 |
|
---|
298 | environment->GetFloatValue("VspKdTree.maxTotalMemory", mMaxTotalMemory);
|
---|
299 | environment->GetFloatValue("VspKdTree.maxStaticMemory", mMaxStaticMemory);
|
---|
300 |
|
---|
301 | environment->GetIntValue("VspKdTree.accessTimeThreshold", mAccessTimeThreshold);
|
---|
302 | environment->GetIntValue("VspKdTree.minCollapseDepth", mMinCollapseDepth);
|
---|
303 |
|
---|
304 | // split type
|
---|
305 | char sname[128];
|
---|
306 | environment->GetStringValue("VspKdTree.splitType", sname);
|
---|
307 | string name(sname);
|
---|
308 |
|
---|
309 | Debug << "======= vsp kd tree options ========" << endl;
|
---|
310 | Debug << "max depth: "<< mTermMaxDepth << endl;
|
---|
311 | Debug << "min pvs: "<< mTermMinPvs << endl;
|
---|
312 | Debug << "min rays: "<< mTermMinRays << endl;
|
---|
313 | Debug << "max ray contribution: "<< mTermMaxRayContribution << endl;
|
---|
314 | Debug << "max cost ratio: "<< mTermMaxCostRatio << endl;
|
---|
315 | Debug << "min size: "<<mTermMinSize << endl;
|
---|
316 |
|
---|
317 | if (name.compare("regular") == 0)
|
---|
318 | {
|
---|
319 | Debug << "using regular split" << endl;
|
---|
320 | splitType = ESplitRegular;
|
---|
321 | }
|
---|
322 | else
|
---|
323 | {
|
---|
324 | if (name.compare("heuristic") == 0)
|
---|
325 | {
|
---|
326 | Debug << "using heuristic split" << endl;
|
---|
327 | splitType = ESplitHeuristic;
|
---|
328 | }
|
---|
329 | else
|
---|
330 | {
|
---|
331 | cerr << "Invalid VspKdTree split type " << name << endl;
|
---|
332 | exit(1);
|
---|
333 | }
|
---|
334 | }
|
---|
335 |
|
---|
336 | mRoot = NULL;
|
---|
337 |
|
---|
338 | mSplitCandidates = new vector<SortableEntry>;
|
---|
339 | }
|
---|
340 |
|
---|
341 |
|
---|
342 | VspKdTree::~VspKdTree()
|
---|
343 | {
|
---|
344 | DEL_PTR(mRoot);
|
---|
345 | DEL_PTR(mSplitCandidates);
|
---|
346 | }
|
---|
347 |
|
---|
348 | void VspKdStatistics::Print(ostream &app) const
|
---|
349 | {
|
---|
350 | app << "===== VspKdTree statistics ===============\n";
|
---|
351 |
|
---|
352 | app << "#N_RAYS ( Number of rays )\n"
|
---|
353 | << rays << endl;
|
---|
354 |
|
---|
355 | app << "#N_INITPVS ( Initial PVS size )\n"
|
---|
356 | << initialPvsSize << endl;
|
---|
357 |
|
---|
358 | app << "#N_NODES ( Number of nodes )\n" << nodes << "\n";
|
---|
359 |
|
---|
360 | app << "#N_LEAVES ( Number of leaves )\n" << Leaves() << "\n";
|
---|
361 |
|
---|
362 | app << "#N_SPLITS ( Number of splits in axes x y z dx dy dz \n";
|
---|
363 |
|
---|
364 | for (int i=0; i<7; i++)
|
---|
365 | app << splits[i] <<" ";
|
---|
366 | app << endl;
|
---|
367 |
|
---|
368 | app << "#N_RAYREFS ( Number of rayRefs )\n" <<
|
---|
369 | rayRefs << "\n";
|
---|
370 |
|
---|
371 | app << "#N_RAYRAYREFS ( Number of rayRefs / ray )\n" <<
|
---|
372 | rayRefs / (double)rays << "\n";
|
---|
373 |
|
---|
374 | app << "#N_LEAFRAYREFS ( Number of rayRefs / leaf )\n" <<
|
---|
375 | rayRefs / (double)Leaves() << "\n";
|
---|
376 |
|
---|
377 | app << "#N_MAXRAYREFS ( Max number of rayRefs / leaf )\n" <<
|
---|
378 | maxRayRefs << "\n";
|
---|
379 |
|
---|
380 | // app << setprecision(4);
|
---|
381 |
|
---|
382 | app << "#N_PMAXDEPTHLEAVES ( Percentage of leaves at maxdepth )\n" <<
|
---|
383 | maxDepthNodes * 100 / (double)Leaves() << endl;
|
---|
384 |
|
---|
385 | app << "#N_PMINPVSLEAVES ( Percentage of leaves with mininimal PVS )\n" <<
|
---|
386 | minPvsNodes * 100 / (double)Leaves() << endl;
|
---|
387 |
|
---|
388 | app << "#N_PMINRAYSLEAVES ( Percentage of leaves with minimal number of rays)\n" <<
|
---|
389 | minRaysNodes * 100 / (double)Leaves() << endl;
|
---|
390 |
|
---|
391 | app << "#N_PMINSIZELEAVES ( Percentage of leaves with minSize )\n"<<
|
---|
392 | minSizeNodes * 100 / (double)Leaves() << endl;
|
---|
393 |
|
---|
394 | app << "#N_PMAXRAYCONTRIBLEAVES ( Percentage of leaves with maximal ray contribution )\n" <<
|
---|
395 | maxRayContribNodes * 100 / (double)Leaves() << endl;
|
---|
396 |
|
---|
397 | app << "#N_ADDED_RAYREFS ( Number of dynamically added ray references )\n"<<
|
---|
398 | addedRayRefs << endl;
|
---|
399 |
|
---|
400 | app << "#N_REMOVED_RAYREFS ( Number of dynamically removed ray references )\n"<<
|
---|
401 | removedRayRefs << endl;
|
---|
402 |
|
---|
403 | // app << setprecision(4);
|
---|
404 |
|
---|
405 | app << "#N_MAXPVS ( Maximal PVS size / leaf)\n"
|
---|
406 | << maxPvsSize << endl;
|
---|
407 |
|
---|
408 | app << "#N_CTIME ( Construction time [s] )\n"
|
---|
409 | << Time() << " \n";
|
---|
410 |
|
---|
411 | app << "===== END OF VspKdTree statistics ==========\n";
|
---|
412 | }
|
---|
413 |
|
---|
414 |
|
---|
415 | void
|
---|
416 | VspKdTreeLeaf::UpdatePvsSize()
|
---|
417 | {
|
---|
418 | if (!mValidPvs)
|
---|
419 | {
|
---|
420 | Intersectable::NewMail();
|
---|
421 | int pvsSize = 0;
|
---|
422 | for(RayInfoContainer::iterator ri = mRays.begin();
|
---|
423 | ri != mRays.end(); ++ ri)
|
---|
424 | {
|
---|
425 | if ((*ri).mRay->IsActive())
|
---|
426 | {
|
---|
427 | Intersectable *object;
|
---|
428 | #if BIDIRECTIONAL_RAY
|
---|
429 | object = (*ri).mRay->mOriginObject;
|
---|
430 |
|
---|
431 | if (object && !object->Mailed())
|
---|
432 | {
|
---|
433 | ++ pvsSize;
|
---|
434 | object->Mail();
|
---|
435 | }
|
---|
436 | #endif
|
---|
437 | object = (*ri).mRay->mTerminationObject;
|
---|
438 | if (object && !object->Mailed())
|
---|
439 | {
|
---|
440 | ++ pvsSize;
|
---|
441 | object->Mail();
|
---|
442 | }
|
---|
443 | }
|
---|
444 | }
|
---|
445 |
|
---|
446 | mPvsSize = pvsSize;
|
---|
447 | mValidPvs = true;
|
---|
448 | }
|
---|
449 | }
|
---|
450 |
|
---|
451 |
|
---|
452 | void
|
---|
453 | VspKdTree::Construct(const VssRayContainer &rays,
|
---|
454 | AxisAlignedBox3 *forcedBoundingBox)
|
---|
455 | {
|
---|
456 | mStat.Start();
|
---|
457 |
|
---|
458 | mMaxMemory = mMaxStaticMemory;
|
---|
459 | DEL_PTR(mRoot);
|
---|
460 |
|
---|
461 | mRoot = new VspKdTreeLeaf(NULL, (int)rays.size());
|
---|
462 |
|
---|
463 | // first construct a leaf that will get subdivided
|
---|
464 | VspKdTreeLeaf *leaf = dynamic_cast<VspKdTreeLeaf *>(mRoot);
|
---|
465 |
|
---|
466 | mStat.nodes = 1;
|
---|
467 | mBox.Initialize();
|
---|
468 |
|
---|
469 | //-- compute bounding box
|
---|
470 | if (forcedBoundingBox)
|
---|
471 | mBox = *forcedBoundingBox;
|
---|
472 | else
|
---|
473 | for (VssRayContainer::const_iterator ri = rays.begin(); ri != rays.end(); ++ ri)
|
---|
474 | {
|
---|
475 | if ((*ri)->mOriginObject)
|
---|
476 | mBox.Include((*ri)->GetOrigin());
|
---|
477 | if ((*ri)->mTerminationObject)
|
---|
478 | mBox.Include((*ri)->GetTermination());
|
---|
479 | }
|
---|
480 |
|
---|
481 | Debug << "bbox = " << mBox << endl;
|
---|
482 |
|
---|
483 | for (VssRayContainer::const_iterator ri = rays.begin(); ri != rays.end(); ++ ri)
|
---|
484 | {
|
---|
485 | //leaf->AddRay(RayInfo(*ri));
|
---|
486 | VssRay *ray = *ri; |
---|
487 | |
---|
488 | float minT, maxT; |
---|
489 | |
---|
490 | // TODO: not very efficient to implictly cast between rays types ... |
---|
491 | if (mBox.GetRaySegment(*ray, minT, maxT)) |
---|
492 | { |
---|
493 | float len = ray->Length(); |
---|
494 | |
---|
495 | if (!len) |
---|
496 | len = Limits::Small; |
---|
497 | |
---|
498 | leaf->AddRay(RayInfo(ray, minT / len, maxT / len));
|
---|
499 | }
|
---|
500 | }
|
---|
501 |
|
---|
502 | mStat.rays = (int)leaf->mRays.size();
|
---|
503 | leaf->UpdatePvsSize();
|
---|
504 |
|
---|
505 | mStat.initialPvsSize = leaf->GetPvsSize();
|
---|
506 |
|
---|
507 | // Subdivide();
|
---|
508 | mRoot = Subdivide(TraversalData(leaf, mBox, 0));
|
---|
509 |
|
---|
510 | if (mSplitCandidates)
|
---|
511 | {
|
---|
512 | // force release of this vector
|
---|
513 | delete mSplitCandidates;
|
---|
514 | mSplitCandidates = new vector<SortableEntry>;
|
---|
515 | }
|
---|
516 |
|
---|
517 | mStat.Stop();
|
---|
518 |
|
---|
519 | mStat.Print(cout);
|
---|
520 | Debug << "#Total memory=" << GetMemUsage() << endl;
|
---|
521 | }
|
---|
522 |
|
---|
523 |
|
---|
524 |
|
---|
525 | VspKdTreeNode *VspKdTree::Subdivide(const TraversalData &tdata)
|
---|
526 | {
|
---|
527 | VspKdTreeNode *result = NULL;
|
---|
528 |
|
---|
529 | priority_queue<TraversalData> tStack;
|
---|
530 | //stack<TraversalData> tStack;
|
---|
531 |
|
---|
532 | tStack.push(tdata);
|
---|
533 |
|
---|
534 | AxisAlignedBox3 backBox;
|
---|
535 | AxisAlignedBox3 frontBox;
|
---|
536 |
|
---|
537 | int lastMem = 0;
|
---|
538 |
|
---|
539 | while (!tStack.empty())
|
---|
540 | {
|
---|
541 | float mem = GetMemUsage();
|
---|
542 |
|
---|
543 | if (lastMem / 10 != ((int)mem) / 10)
|
---|
544 | {
|
---|
545 | Debug << mem << " MB" << endl;
|
---|
546 | }
|
---|
547 | lastMem = (int)mem;
|
---|
548 |
|
---|
549 | if (1 && mem > mMaxMemory)
|
---|
550 | {
|
---|
551 | Debug << "memory limit reached: " << mem << endl;
|
---|
552 | // count statistics on unprocessed leafs
|
---|
553 | while (!tStack.empty())
|
---|
554 | {
|
---|
555 | EvaluateLeafStats(tStack.top());
|
---|
556 | tStack.pop();
|
---|
557 | }
|
---|
558 | break;
|
---|
559 | }
|
---|
560 |
|
---|
561 | TraversalData data = tStack.top();
|
---|
562 | tStack.pop();
|
---|
563 |
|
---|
564 | VspKdTreeNode *node = SubdivideNode((VspKdTreeLeaf *) data.mNode,
|
---|
565 | data.mBox, backBox, frontBox);
|
---|
566 | if (result == NULL)
|
---|
567 | result = node;
|
---|
568 |
|
---|
569 | if (!node->IsLeaf())
|
---|
570 | {
|
---|
571 | VspKdTreeInterior *interior = dynamic_cast<VspKdTreeInterior *>(node);
|
---|
572 |
|
---|
573 | // push the children on the stack
|
---|
574 | tStack.push(TraversalData(interior->GetBack(), backBox, data.mDepth + 1));
|
---|
575 | tStack.push(TraversalData(interior->GetFront(), frontBox, data.mDepth + 1));
|
---|
576 | }
|
---|
577 | else
|
---|
578 | {
|
---|
579 | EvaluateLeafStats(data);
|
---|
580 | }
|
---|
581 | }
|
---|
582 |
|
---|
583 | return result;
|
---|
584 | }
|
---|
585 |
|
---|
586 |
|
---|
587 | // returns selected plane for subdivision
|
---|
588 | int VspKdTree::SelectPlane(VspKdTreeLeaf *leaf,
|
---|
589 | const AxisAlignedBox3 &box,
|
---|
590 | float &position,
|
---|
591 | int &raysBack,
|
---|
592 | int &raysFront,
|
---|
593 | int &pvsBack,
|
---|
594 | int &pvsFront)
|
---|
595 | {
|
---|
596 | int minDirDepth = 6;
|
---|
597 | int axis = 0;
|
---|
598 | float costRatio = 0;
|
---|
599 |
|
---|
600 | if (splitType == ESplitRegular)
|
---|
601 | {
|
---|
602 | costRatio = BestCostRatioRegular(leaf,
|
---|
603 | axis,
|
---|
604 | position,
|
---|
605 | raysBack,
|
---|
606 | raysFront,
|
---|
607 | pvsBack,
|
---|
608 | pvsFront);
|
---|
609 | }
|
---|
610 | else if (splitType == ESplitHeuristic)
|
---|
611 | {
|
---|
612 | costRatio = BestCostRatioHeuristic(leaf,
|
---|
613 | axis,
|
---|
614 | position,
|
---|
615 | raysBack,
|
---|
616 | raysFront,
|
---|
617 | pvsBack,
|
---|
618 | pvsFront);
|
---|
619 | }
|
---|
620 | else
|
---|
621 | {
|
---|
622 | cerr << "VspKdTree: Unknown split heuristics\n";
|
---|
623 | exit(1);
|
---|
624 | }
|
---|
625 |
|
---|
626 | if (costRatio > mTermMaxCostRatio)
|
---|
627 | {
|
---|
628 | Debug << "Too big cost ratio " << costRatio << endl;
|
---|
629 | return -1;
|
---|
630 | }
|
---|
631 |
|
---|
632 | if (0)
|
---|
633 | Debug << "pvs=" << leaf->mPvsSize
|
---|
634 | << " rays=" << (int)leaf->mRays.size()
|
---|
635 | << " rc=" << leaf->GetAvgRayContribution()
|
---|
636 | << " axis=" << axis << endl;
|
---|
637 |
|
---|
638 | return axis;
|
---|
639 | }
|
---|
640 |
|
---|
641 |
|
---|
642 |
|
---|
643 | float VspKdTree::EvalCostRatio(VspKdTreeLeaf *leaf,
|
---|
644 | const int axis,
|
---|
645 | const float position,
|
---|
646 | int &raysBack,
|
---|
647 | int &raysFront,
|
---|
648 | int &pvsBack,
|
---|
649 | int &pvsFront)
|
---|
650 | {
|
---|
651 | raysBack = 0;
|
---|
652 | raysFront = 0;
|
---|
653 | pvsFront = 0;
|
---|
654 | pvsBack = 0;
|
---|
655 |
|
---|
656 | float newCost;
|
---|
657 |
|
---|
658 | Intersectable::NewMail(3);
|
---|
659 |
|
---|
660 | // eval pvs size
|
---|
661 | int pvsSize = leaf->GetPvsSize();
|
---|
662 |
|
---|
663 | Intersectable::NewMail(3);
|
---|
664 |
|
---|
665 | // this is the main ray classification loop!
|
---|
666 | for(RayInfoContainer::iterator ri = leaf->mRays.begin();
|
---|
667 | ri != leaf->mRays.end(); ++ ri)
|
---|
668 | {
|
---|
669 | if (!(*ri).mRay->IsActive())
|
---|
670 | continue;
|
---|
671 |
|
---|
672 | // determine the side of this ray with respect to the plane
|
---|
673 | int side = (*ri).ComputeRayIntersection(axis, position, (*ri).mRay->mT);
|
---|
674 | // (*ri).mRay->mSide = side;
|
---|
675 |
|
---|
676 | if (side <= 0)
|
---|
677 | ++ raysBack;
|
---|
678 |
|
---|
679 | if (side >= 0)
|
---|
680 | ++ raysFront;
|
---|
681 |
|
---|
682 | AddObject2Pvs((*ri).mRay->mTerminationObject, side, pvsBack, pvsFront);
|
---|
683 | }
|
---|
684 |
|
---|
685 | if (0)
|
---|
686 | {
|
---|
687 | const float sum = float(pvsBack + pvsFront);
|
---|
688 | const float oldCost = (float)pvsSize * 2;
|
---|
689 |
|
---|
690 | return sum / oldCost;
|
---|
691 | }
|
---|
692 | else
|
---|
693 | {
|
---|
694 | AxisAlignedBox3 box = GetBBox(leaf);
|
---|
695 |
|
---|
696 | float minBox = box.Min(axis);
|
---|
697 | float maxBox = box.Max(axis);
|
---|
698 | float sizeBox = maxBox - minBox;
|
---|
699 |
|
---|
700 | // float sum = raysBack*(position - minBox) + raysFront*(maxBox - position);
|
---|
701 | const float sum = pvsBack * (position - minBox) + pvsFront * (maxBox - position);
|
---|
702 |
|
---|
703 | newCost = mCtDivCi + sum / sizeBox;
|
---|
704 |
|
---|
705 | //Debug << axis << " " << pvsSize << " " << pvsBack << " " << pvsFront << endl;
|
---|
706 | // float oldCost = leaf->mRays.size();
|
---|
707 | const float oldCost = (float)pvsSize;
|
---|
708 |
|
---|
709 | return newCost / oldCost;
|
---|
710 | }
|
---|
711 | }
|
---|
712 |
|
---|
713 | float VspKdTree::BestCostRatioRegular(VspKdTreeLeaf *leaf,
|
---|
714 | int &axis,
|
---|
715 | float &position,
|
---|
716 | int &raysBack,
|
---|
717 | int &raysFront,
|
---|
718 | int &pvsBack,
|
---|
719 | int &pvsFront)
|
---|
720 | {
|
---|
721 | int nRaysBack[3], nRaysFront[3];
|
---|
722 | int nPvsBack[3], nPvsFront[3];
|
---|
723 |
|
---|
724 | float nPosition[3];
|
---|
725 | float nCostRatio[3];
|
---|
726 | int bestAxis = -1;
|
---|
727 |
|
---|
728 | AxisAlignedBox3 sBox = GetBBox(leaf);
|
---|
729 |
|
---|
730 | const int sAxis = sBox.Size().DrivingAxis();
|
---|
731 |
|
---|
732 | for (axis = 0; axis < 3; ++ axis)
|
---|
733 | {
|
---|
734 | if (!mOnlyDrivingAxis || axis == sAxis)
|
---|
735 | {
|
---|
736 |
|
---|
737 | nPosition[axis] = (sBox.Min()[axis] + sBox.Max()[axis]) * 0.5f;
|
---|
738 |
|
---|
739 | nCostRatio[axis] = EvalCostRatio(leaf,
|
---|
740 | axis,
|
---|
741 | nPosition[axis],
|
---|
742 | nRaysBack[axis],
|
---|
743 | nRaysFront[axis],
|
---|
744 | nPvsBack[axis],
|
---|
745 | nPvsFront[axis]);
|
---|
746 | if (bestAxis == -1)
|
---|
747 | {
|
---|
748 | bestAxis = axis;
|
---|
749 | }
|
---|
750 | else if (nCostRatio[axis] < nCostRatio[bestAxis])
|
---|
751 | {
|
---|
752 | /*Debug << "pvs front " << nPvsBack[axis]
|
---|
753 | << " pvs back " << nPvsFront[axis]
|
---|
754 | << " overall pvs " << leaf->GetPvsSize() << endl;*/
|
---|
755 | bestAxis = axis;
|
---|
756 | }
|
---|
757 |
|
---|
758 | }
|
---|
759 | }
|
---|
760 |
|
---|
761 | //-- assign best axis
|
---|
762 | axis = bestAxis;
|
---|
763 | position = nPosition[bestAxis];
|
---|
764 |
|
---|
765 | raysBack = nRaysBack[bestAxis];
|
---|
766 | raysFront = nRaysFront[bestAxis];
|
---|
767 |
|
---|
768 | pvsBack = nPvsBack[bestAxis];
|
---|
769 | pvsFront = nPvsFront[bestAxis];
|
---|
770 |
|
---|
771 | return nCostRatio[bestAxis];
|
---|
772 | }
|
---|
773 |
|
---|
774 | float VspKdTree::BestCostRatioHeuristic(VspKdTreeLeaf *leaf,
|
---|
775 | int &axis,
|
---|
776 | float &position,
|
---|
777 | int &raysBack,
|
---|
778 | int &raysFront,
|
---|
779 | int &pvsBack,
|
---|
780 | int &pvsFront)
|
---|
781 | {
|
---|
782 | AxisAlignedBox3 box = GetBBox(leaf);
|
---|
783 | // AxisAlignedBox3 dirBox = GetDirBBox(node);
|
---|
784 |
|
---|
785 | axis = box.Size().DrivingAxis();
|
---|
786 |
|
---|
787 | SortSplitCandidates(leaf, axis);
|
---|
788 |
|
---|
789 | // go through the lists, count the number of objects left and right
|
---|
790 | // and evaluate the following cost funcion:
|
---|
791 | // C = ct_div_ci + (ql*rl + qr*rr)/queries
|
---|
792 |
|
---|
793 | int rl = 0, rr = (int)leaf->mRays.size();
|
---|
794 | int pl = 0, pr = leaf->GetPvsSize();
|
---|
795 |
|
---|
796 | float minBox = box.Min(axis);
|
---|
797 | float maxBox = box.Max(axis);
|
---|
798 | float sizeBox = maxBox - minBox;
|
---|
799 |
|
---|
800 | float minBand = minBox + 0.1f*(maxBox - minBox);
|
---|
801 | float maxBand = minBox + 0.9f*(maxBox - minBox);
|
---|
802 |
|
---|
803 | float sum = rr*sizeBox;
|
---|
804 | float minSum = 1e20f;
|
---|
805 |
|
---|
806 | Intersectable::NewMail();
|
---|
807 |
|
---|
808 | // set all object as belonging to the fron pvs
|
---|
809 | for(RayInfoContainer::iterator ri = leaf->mRays.begin();
|
---|
810 | ri != leaf->mRays.end(); ++ ri)
|
---|
811 | {
|
---|
812 | if ((*ri).mRay->IsActive())
|
---|
813 | {
|
---|
814 | Intersectable *object = (*ri).mRay->mTerminationObject;
|
---|
815 |
|
---|
816 | if (object)
|
---|
817 | if (!object->Mailed())
|
---|
818 | {
|
---|
819 | object->Mail();
|
---|
820 | object->mCounter = 1;
|
---|
821 | }
|
---|
822 | else
|
---|
823 | ++ object->mCounter;
|
---|
824 | }
|
---|
825 | }
|
---|
826 |
|
---|
827 | Intersectable::NewMail();
|
---|
828 |
|
---|
829 | for (vector<SortableEntry>::const_iterator ci = mSplitCandidates->begin();
|
---|
830 | ci < mSplitCandidates->end(); ++ ci)
|
---|
831 | {
|
---|
832 | VssRay *ray;
|
---|
833 |
|
---|
834 | switch ((*ci).type)
|
---|
835 | {
|
---|
836 | case SortableEntry::ERayMin:
|
---|
837 | {
|
---|
838 | ++ rl;
|
---|
839 | ray = (VssRay *) (*ci).data;
|
---|
840 | Intersectable *object = ray->mTerminationObject;
|
---|
841 | if (object && !object->Mailed())
|
---|
842 | {
|
---|
843 | object->Mail();
|
---|
844 | ++ pl;
|
---|
845 | }
|
---|
846 | break;
|
---|
847 | }
|
---|
848 | case SortableEntry::ERayMax:
|
---|
849 | {
|
---|
850 | -- rr;
|
---|
851 |
|
---|
852 | ray = (VssRay *) (*ci).data;
|
---|
853 | Intersectable *object = ray->mTerminationObject;
|
---|
854 |
|
---|
855 | if (object)
|
---|
856 | {
|
---|
857 | if (-- object->mCounter == 0)
|
---|
858 | -- pr;
|
---|
859 | }
|
---|
860 |
|
---|
861 | break;
|
---|
862 | }
|
---|
863 | }
|
---|
864 |
|
---|
865 | if ((*ci).value > minBand && (*ci).value < maxBand)
|
---|
866 | {
|
---|
867 | sum = pl*((*ci).value - minBox) + pr*(maxBox - (*ci).value);
|
---|
868 |
|
---|
869 | // cout<<"pos="<<(*ci).value<<"\t q=("<<ql<<","<<qr<<")\t r=("<<rl<<","<<rr<<")"<<endl;
|
---|
870 | // cout<<"cost= "<<sum<<endl;
|
---|
871 |
|
---|
872 | if (sum < minSum)
|
---|
873 | {
|
---|
874 | minSum = sum;
|
---|
875 | position = (*ci).value;
|
---|
876 |
|
---|
877 | raysBack = rl;
|
---|
878 | raysFront = rr;
|
---|
879 |
|
---|
880 | pvsBack = pl;
|
---|
881 | pvsFront = pr;
|
---|
882 |
|
---|
883 | }
|
---|
884 | }
|
---|
885 | }
|
---|
886 |
|
---|
887 | float oldCost = (float)leaf->GetPvsSize();
|
---|
888 | float newCost = mCtDivCi + minSum / sizeBox;
|
---|
889 | float ratio = newCost / oldCost;
|
---|
890 |
|
---|
891 | //Debug << "costRatio=" << ratio << " pos=" << position << " t=" << (position - minBox) / (maxBox - minBox)
|
---|
892 | // <<"\t q=(" << queriesBack << "," << queriesFront << ")\t r=(" << raysBack << "," << raysFront << ")" << endl;
|
---|
893 |
|
---|
894 | return ratio;
|
---|
895 | }
|
---|
896 |
|
---|
897 | void VspKdTree::SortSplitCandidates(VspKdTreeLeaf *node,
|
---|
898 | const int axis)
|
---|
899 | {
|
---|
900 | mSplitCandidates->clear();
|
---|
901 |
|
---|
902 | int requestedSize = 2 * (int)(node->mRays.size());
|
---|
903 | // creates a sorted split candidates array
|
---|
904 | if (mSplitCandidates->capacity() > 500000 &&
|
---|
905 | requestedSize < (int)(mSplitCandidates->capacity()/10) )
|
---|
906 | {
|
---|
907 | DEL_PTR(mSplitCandidates);
|
---|
908 | mSplitCandidates = new vector<SortableEntry>;
|
---|
909 | }
|
---|
910 |
|
---|
911 | mSplitCandidates->reserve(requestedSize);
|
---|
912 |
|
---|
913 | // insert all queries
|
---|
914 | for(RayInfoContainer::const_iterator ri = node->mRays.begin();
|
---|
915 | ri < node->mRays.end(); ++ ri)
|
---|
916 | {
|
---|
917 | bool positive = (*ri).mRay->HasPosDir(axis);
|
---|
918 | mSplitCandidates->push_back(SortableEntry(positive ? SortableEntry::ERayMin : SortableEntry::ERayMax,
|
---|
919 | (*ri).ExtrapOrigin(axis), (void *)&*ri));
|
---|
920 |
|
---|
921 | mSplitCandidates->push_back(SortableEntry(positive ? SortableEntry::ERayMax : SortableEntry::ERayMin,
|
---|
922 | (*ri).ExtrapTermination(axis), (void *)&*ri));
|
---|
923 | }
|
---|
924 |
|
---|
925 | stable_sort(mSplitCandidates->begin(), mSplitCandidates->end());
|
---|
926 | }
|
---|
927 |
|
---|
928 |
|
---|
929 | void VspKdTree::EvaluateLeafStats(const TraversalData &data)
|
---|
930 | {
|
---|
931 | // the node became a leaf -> evaluate stats for leafs
|
---|
932 | VspKdTreeLeaf *leaf = dynamic_cast<VspKdTreeLeaf *>(data.mNode);
|
---|
933 |
|
---|
934 | if (leaf->GetPvsSize() > mStat.maxPvsSize)
|
---|
935 | mStat.maxPvsSize = leaf->GetPvsSize();
|
---|
936 |
|
---|
937 | if ((int)(leaf->mRays.size()) > mStat.maxRayRefs)
|
---|
938 | mStat.maxRayRefs = (int)leaf->mRays.size();
|
---|
939 |
|
---|
940 |
|
---|
941 | if (data.mDepth >= mTermMaxDepth)
|
---|
942 | ++ mStat.maxDepthNodes;
|
---|
943 |
|
---|
944 | if (leaf->GetPvsSize() < mTermMinPvs)
|
---|
945 | ++ mStat.minPvsNodes;
|
---|
946 |
|
---|
947 | if ((int)leaf->GetRays().size() < mTermMinRays)
|
---|
948 | ++ mStat.minRaysNodes;
|
---|
949 |
|
---|
950 | if (leaf->GetAvgRayContribution() > mTermMaxRayContribution)
|
---|
951 | ++ mStat.maxRayContribNodes;
|
---|
952 |
|
---|
953 | if (SqrMagnitude(data.mBox.Size()) <= mTermMinSize)
|
---|
954 | ++ mStat.minSizeNodes;
|
---|
955 | }
|
---|
956 |
|
---|
957 |
|
---|
958 | inline bool VspKdTree::TerminationCriteriaMet(const VspKdTreeLeaf *leaf,
|
---|
959 | const AxisAlignedBox3 &box) const
|
---|
960 | {
|
---|
961 | return ((leaf->GetPvsSize() < mTermMinPvs) ||
|
---|
962 | (leaf->mRays.size() < mTermMinRays) ||
|
---|
963 | (leaf->GetAvgRayContribution() > mTermMaxRayContribution ) ||
|
---|
964 | (leaf->mDepth >= mTermMaxDepth) ||
|
---|
965 | (SqrMagnitude(box.Size()) <= mTermMinSize));
|
---|
966 | }
|
---|
967 |
|
---|
968 |
|
---|
969 | VspKdTreeNode *VspKdTree::SubdivideNode(VspKdTreeLeaf *leaf,
|
---|
970 | const AxisAlignedBox3 &box,
|
---|
971 | AxisAlignedBox3 &backBBox,
|
---|
972 | AxisAlignedBox3 &frontBBox)
|
---|
973 | {
|
---|
974 | if (TerminationCriteriaMet(leaf, box))
|
---|
975 | {
|
---|
976 | if (1 && leaf->mDepth >= mTermMaxDepth)
|
---|
977 | {
|
---|
978 | Debug << "Warning: max depth reached depth=" << (int)leaf->mDepth<<" rays=" << (int)leaf->mRays.size() << endl;
|
---|
979 | Debug << "Bbox: " << GetBBox(leaf) << endl;
|
---|
980 | }
|
---|
981 | //Debug << "depth: " << (int)leaf->mDepth << " pvs: " << leaf->GetPvsSize() << " rays: " << leaf->mRays.size() << endl;
|
---|
982 |
|
---|
983 | return leaf;
|
---|
984 | }
|
---|
985 |
|
---|
986 | float position;
|
---|
987 | // first count ray sides
|
---|
988 | int raysBack;
|
---|
989 | int raysFront;
|
---|
990 | int pvsBack;
|
---|
991 | int pvsFront;
|
---|
992 |
|
---|
993 | // select subdivision axis
|
---|
994 | const int axis = SelectPlane(leaf, box, position, raysBack, raysFront, pvsBack, pvsFront);
|
---|
995 |
|
---|
996 | //Debug << "rays back=" << raysBack << " rays front=" << raysFront << " pvs back=" << pvsBack << " pvs front=" << pvsFront << endl;
|
---|
997 |
|
---|
998 | if (axis == -1)
|
---|
999 | {
|
---|
1000 | return leaf;
|
---|
1001 | }
|
---|
1002 |
|
---|
1003 | mStat.nodes += 2;
|
---|
1004 | //++ mStat.splits[axis];
|
---|
1005 |
|
---|
1006 | // add the new nodes to the tree
|
---|
1007 | VspKdTreeInterior *node = new VspKdTreeInterior(leaf->mParent);
|
---|
1008 |
|
---|
1009 | node->mAxis = axis;
|
---|
1010 | node->mPosition = position;
|
---|
1011 | node->mBox = box;
|
---|
1012 |
|
---|
1013 | backBBox = box;
|
---|
1014 | frontBBox = box;
|
---|
1015 |
|
---|
1016 | VspKdTreeLeaf *back = new VspKdTreeLeaf(node, raysBack);
|
---|
1017 | back->SetPvsSize(pvsBack);
|
---|
1018 | VspKdTreeLeaf *front = new VspKdTreeLeaf(node, raysFront);
|
---|
1019 | front->SetPvsSize(pvsFront);
|
---|
1020 |
|
---|
1021 | // replace a link from node's parent
|
---|
1022 | if (leaf->mParent)
|
---|
1023 | leaf->mParent->ReplaceChildLink(leaf, node);
|
---|
1024 | // and setup child links
|
---|
1025 | node->SetupChildLinks(back, front);
|
---|
1026 |
|
---|
1027 | if (axis <= VspKdTreeNode::SPLIT_Z)
|
---|
1028 | {
|
---|
1029 | backBBox.SetMax(axis, position);
|
---|
1030 | frontBBox.SetMin(axis, position);
|
---|
1031 |
|
---|
1032 | for(RayInfoContainer::iterator ri = leaf->mRays.begin();
|
---|
1033 | ri != leaf->mRays.end(); ++ ri)
|
---|
1034 | {
|
---|
1035 | if ((*ri).mRay->IsActive())
|
---|
1036 | {
|
---|
1037 | // first unref ray from the former leaf
|
---|
1038 | (*ri).mRay->Unref();
|
---|
1039 |
|
---|
1040 | // determine the side of this ray with respect to the plane
|
---|
1041 | int side = node->ComputeRayIntersection(*ri, (*ri).mRay->mT);
|
---|
1042 |
|
---|
1043 | if (side == 0)
|
---|
1044 | {
|
---|
1045 | if ((*ri).mRay->HasPosDir(axis))
|
---|
1046 | {
|
---|
1047 | back->AddRay(RayInfo((*ri).mRay,
|
---|
1048 | (*ri).mMinT,
|
---|
1049 | (*ri).mRay->mT));
|
---|
1050 | front->AddRay(RayInfo((*ri).mRay,
|
---|
1051 | (*ri).mRay->mT,
|
---|
1052 | (*ri).mMaxT));
|
---|
1053 | }
|
---|
1054 | else
|
---|
1055 | {
|
---|
1056 | back->AddRay(RayInfo((*ri).mRay,
|
---|
1057 | (*ri).mRay->mT,
|
---|
1058 | (*ri).mMaxT));
|
---|
1059 | front->AddRay(RayInfo((*ri).mRay,
|
---|
1060 | (*ri).mMinT,
|
---|
1061 | (*ri).mRay->mT));
|
---|
1062 | }
|
---|
1063 | }
|
---|
1064 | else
|
---|
1065 | if (side == 1)
|
---|
1066 | front->AddRay(*ri);
|
---|
1067 | else
|
---|
1068 | back->AddRay(*ri);
|
---|
1069 | } else
|
---|
1070 | (*ri).mRay->Unref();
|
---|
1071 | }
|
---|
1072 | }
|
---|
1073 | else
|
---|
1074 | {
|
---|
1075 | // rays front/back
|
---|
1076 |
|
---|
1077 | for (RayInfoContainer::iterator ri = leaf->mRays.begin();
|
---|
1078 | ri != leaf->mRays.end(); ++ ri)
|
---|
1079 | {
|
---|
1080 | if ((*ri).mRay->IsActive())
|
---|
1081 | {
|
---|
1082 | // first unref ray from the former leaf
|
---|
1083 | (*ri).mRay->Unref();
|
---|
1084 |
|
---|
1085 | int side;
|
---|
1086 | if ((*ri).mRay->GetDirParametrization(axis - 3) > position)
|
---|
1087 | side = 1;
|
---|
1088 | else
|
---|
1089 | side = -1;
|
---|
1090 |
|
---|
1091 | if (side == 1)
|
---|
1092 | front->AddRay(*ri);
|
---|
1093 | else
|
---|
1094 | back->AddRay(*ri);
|
---|
1095 | }
|
---|
1096 | else
|
---|
1097 | (*ri).mRay->Unref();
|
---|
1098 | }
|
---|
1099 | }
|
---|
1100 |
|
---|
1101 | // update stats
|
---|
1102 | mStat.rayRefs -= (int)leaf->mRays.size();
|
---|
1103 | mStat.rayRefs += raysBack + raysFront;
|
---|
1104 |
|
---|
1105 | DEL_PTR(leaf);
|
---|
1106 |
|
---|
1107 | return node;
|
---|
1108 | }
|
---|
1109 |
|
---|
1110 | int VspKdTree::ReleaseMemory(const int time)
|
---|
1111 | {
|
---|
1112 | stack<VspKdTreeNode *> tstack;
|
---|
1113 |
|
---|
1114 | // find a node in the tree which subtree will be collapsed
|
---|
1115 | int maxAccessTime = time - mAccessTimeThreshold;
|
---|
1116 | int released = 0;
|
---|
1117 |
|
---|
1118 | tstack.push(mRoot);
|
---|
1119 |
|
---|
1120 | while (!tstack.empty())
|
---|
1121 | {
|
---|
1122 | VspKdTreeNode *node = tstack.top();
|
---|
1123 | tstack.pop();
|
---|
1124 |
|
---|
1125 | if (!node->IsLeaf())
|
---|
1126 | {
|
---|
1127 | VspKdTreeInterior *in = dynamic_cast<VspKdTreeInterior *>(node);
|
---|
1128 | // cout<<"depth="<<(int)in->depth<<" time="<<in->lastAccessTime<<endl;
|
---|
1129 | if (in->mDepth >= mMinCollapseDepth && in->mLastAccessTime <= maxAccessTime)
|
---|
1130 | {
|
---|
1131 | released = CollapseSubtree(node, time);
|
---|
1132 | break;
|
---|
1133 | }
|
---|
1134 | if (in->GetBack()->GetAccessTime() < in->GetFront()->GetAccessTime())
|
---|
1135 | {
|
---|
1136 | tstack.push(in->GetFront());
|
---|
1137 | tstack.push(in->GetBack());
|
---|
1138 | }
|
---|
1139 | else
|
---|
1140 | {
|
---|
1141 | tstack.push(in->GetBack());
|
---|
1142 | tstack.push(in->GetFront());
|
---|
1143 | }
|
---|
1144 | }
|
---|
1145 | }
|
---|
1146 |
|
---|
1147 | while (tstack.empty())
|
---|
1148 | {
|
---|
1149 | // could find node to collaps...
|
---|
1150 | // cout<<"Could not find a node to release "<<endl;
|
---|
1151 | break;
|
---|
1152 | }
|
---|
1153 |
|
---|
1154 | return released;
|
---|
1155 | }
|
---|
1156 |
|
---|
1157 |
|
---|
1158 | VspKdTreeNode *VspKdTree::SubdivideLeaf(VspKdTreeLeaf *leaf,
|
---|
1159 | const float sizeThreshold)
|
---|
1160 | {
|
---|
1161 | VspKdTreeNode *node = leaf;
|
---|
1162 |
|
---|
1163 | AxisAlignedBox3 leafBBox = GetBBox(leaf);
|
---|
1164 |
|
---|
1165 | static int pass = 0;
|
---|
1166 | ++ pass;
|
---|
1167 |
|
---|
1168 | // check if we should perform a dynamic subdivision of the leaf
|
---|
1169 | if (// leaf->mRays.size() > (unsigned)termMinCost &&
|
---|
1170 | (leaf->GetPvsSize() >= mTermMinPvs) &&
|
---|
1171 | (SqrMagnitude(leafBBox.Size()) > sizeThreshold) )
|
---|
1172 | {
|
---|
1173 | // memory check and release
|
---|
1174 | if (GetMemUsage() > mMaxTotalMemory)
|
---|
1175 | ReleaseMemory(pass);
|
---|
1176 |
|
---|
1177 | AxisAlignedBox3 backBBox, frontBBox;
|
---|
1178 |
|
---|
1179 | // subdivide the node
|
---|
1180 | node = SubdivideNode(leaf, leafBBox, backBBox, frontBBox);
|
---|
1181 | }
|
---|
1182 | return node;
|
---|
1183 | }
|
---|
1184 |
|
---|
1185 |
|
---|
1186 |
|
---|
1187 | void VspKdTree::UpdateRays(VssRayContainer &remove,
|
---|
1188 | VssRayContainer &add)
|
---|
1189 | {
|
---|
1190 | VspKdTreeLeaf::NewMail();
|
---|
1191 |
|
---|
1192 | // schedule rays for removal
|
---|
1193 | for(VssRayContainer::const_iterator ri = remove.begin();
|
---|
1194 | ri != remove.end(); ++ ri)
|
---|
1195 | {
|
---|
1196 | (*ri)->ScheduleForRemoval();
|
---|
1197 | }
|
---|
1198 |
|
---|
1199 | int inactive = 0;
|
---|
1200 |
|
---|
1201 | for (VssRayContainer::const_iterator ri = remove.begin(); ri != remove.end(); ++ ri)
|
---|
1202 | {
|
---|
1203 | if ((*ri)->ScheduledForRemoval())
|
---|
1204 | // RemoveRay(*ri, NULL, false);
|
---|
1205 | // !!! BUG - with true it does not work correctly - aggreated delete
|
---|
1206 | RemoveRay(*ri, NULL, true);
|
---|
1207 | else
|
---|
1208 | ++ inactive;
|
---|
1209 | }
|
---|
1210 |
|
---|
1211 | // cout<<"all/inactive"<<remove.size()<<"/"<<inactive<<endl;
|
---|
1212 | for (VssRayContainer::const_iterator ri = add.begin(); ri != add.end(); ++ ri)
|
---|
1213 | {
|
---|
1214 | AddRay(*ri);
|
---|
1215 | }
|
---|
1216 | }
|
---|
1217 |
|
---|
1218 |
|
---|
1219 | void VspKdTree::RemoveRay(VssRay *ray,
|
---|
1220 | vector<VspKdTreeLeaf *> *affectedLeaves,
|
---|
1221 | const bool removeAllScheduledRays)
|
---|
1222 | {
|
---|
1223 | stack<RayTraversalData> tstack;
|
---|
1224 |
|
---|
1225 | tstack.push(RayTraversalData(mRoot, RayInfo(ray)));
|
---|
1226 |
|
---|
1227 | RayTraversalData data;
|
---|
1228 |
|
---|
1229 | // cout<<"Number of ray refs = "<<ray->RefCount()<<endl;
|
---|
1230 | while (!tstack.empty())
|
---|
1231 | {
|
---|
1232 | data = tstack.top();
|
---|
1233 | tstack.pop();
|
---|
1234 |
|
---|
1235 | if (!data.mNode->IsLeaf())
|
---|
1236 | {
|
---|
1237 | // split the set of rays in two groups intersecting the
|
---|
1238 | // two subtrees
|
---|
1239 | TraverseInternalNode(data, tstack);
|
---|
1240 | }
|
---|
1241 | else
|
---|
1242 | {
|
---|
1243 | // remove the ray from the leaf
|
---|
1244 | // find the ray in the leaf and swap it with the last ray...
|
---|
1245 | VspKdTreeLeaf *leaf = (VspKdTreeLeaf *)data.mNode;
|
---|
1246 |
|
---|
1247 | if (!leaf->Mailed())
|
---|
1248 | {
|
---|
1249 | leaf->Mail();
|
---|
1250 |
|
---|
1251 | if (affectedLeaves)
|
---|
1252 | affectedLeaves->push_back(leaf);
|
---|
1253 |
|
---|
1254 | if (removeAllScheduledRays)
|
---|
1255 | {
|
---|
1256 | int tail = (int)leaf->mRays.size() - 1;
|
---|
1257 |
|
---|
1258 | for (int i=0; i < (int)(leaf->mRays.size()); ++ i)
|
---|
1259 | {
|
---|
1260 | if (leaf->mRays[i].mRay->ScheduledForRemoval())
|
---|
1261 | {
|
---|
1262 | // find a ray to replace it with
|
---|
1263 | while (tail >= i && leaf->mRays[tail].mRay->ScheduledForRemoval())
|
---|
1264 | {
|
---|
1265 | ++ mStat.removedRayRefs;
|
---|
1266 | leaf->mRays[tail].mRay->Unref();
|
---|
1267 | leaf->mRays.pop_back();
|
---|
1268 |
|
---|
1269 | -- tail;
|
---|
1270 | }
|
---|
1271 |
|
---|
1272 | if (tail < i)
|
---|
1273 | break;
|
---|
1274 |
|
---|
1275 | ++ mStat.removedRayRefs;
|
---|
1276 |
|
---|
1277 | leaf->mRays[i].mRay->Unref();
|
---|
1278 | leaf->mRays[i] = leaf->mRays[tail];
|
---|
1279 | leaf->mRays.pop_back();
|
---|
1280 | -- tail;
|
---|
1281 | }
|
---|
1282 | }
|
---|
1283 | }
|
---|
1284 | }
|
---|
1285 |
|
---|
1286 | if (!removeAllScheduledRays)
|
---|
1287 | for (int i=0; i < (int)leaf->mRays.size(); i++)
|
---|
1288 | {
|
---|
1289 | if (leaf->mRays[i].mRay == ray)
|
---|
1290 | {
|
---|
1291 | ++ mStat.removedRayRefs;
|
---|
1292 | ray->Unref();
|
---|
1293 | leaf->mRays[i] = leaf->mRays[leaf->mRays.size() - 1];
|
---|
1294 | leaf->mRays.pop_back();
|
---|
1295 | // check this ray again
|
---|
1296 | break;
|
---|
1297 | }
|
---|
1298 | }
|
---|
1299 | }
|
---|
1300 | }
|
---|
1301 |
|
---|
1302 | if (ray->RefCount() != 0)
|
---|
1303 | {
|
---|
1304 | cerr << "Error: Number of remaining refs = " << ray->RefCount() << endl;
|
---|
1305 | exit(1);
|
---|
1306 | }
|
---|
1307 |
|
---|
1308 | }
|
---|
1309 |
|
---|
1310 | void VspKdTree::AddRay(VssRay *ray)
|
---|
1311 | {
|
---|
1312 | stack<RayTraversalData> tstack;
|
---|
1313 |
|
---|
1314 | tstack.push(RayTraversalData(mRoot, RayInfo(ray)));
|
---|
1315 |
|
---|
1316 | RayTraversalData data;
|
---|
1317 |
|
---|
1318 | while (!tstack.empty())
|
---|
1319 | {
|
---|
1320 | data = tstack.top();
|
---|
1321 | tstack.pop();
|
---|
1322 |
|
---|
1323 | if (!data.mNode->IsLeaf())
|
---|
1324 | {
|
---|
1325 | TraverseInternalNode(data, tstack);
|
---|
1326 | }
|
---|
1327 | else
|
---|
1328 | {
|
---|
1329 | // remove the ray from the leaf
|
---|
1330 | // find the ray in the leaf and swap it with the last ray
|
---|
1331 | VspKdTreeLeaf *leaf = dynamic_cast<VspKdTreeLeaf *>(data.mNode);
|
---|
1332 |
|
---|
1333 | leaf->AddRay(data.mRayData);
|
---|
1334 | ++ mStat.addedRayRefs;
|
---|
1335 | }
|
---|
1336 | }
|
---|
1337 | }
|
---|
1338 |
|
---|
1339 | void VspKdTree::TraverseInternalNode(RayTraversalData &data,
|
---|
1340 | stack<RayTraversalData> &tstack)
|
---|
1341 | {
|
---|
1342 | VspKdTreeInterior *in = dynamic_cast<VspKdTreeInterior *>(data.mNode);
|
---|
1343 |
|
---|
1344 | if (in->mAxis <= VspKdTreeNode::SPLIT_Z)
|
---|
1345 | {
|
---|
1346 | // determine the side of this ray with respect to the plane
|
---|
1347 | int side = in->ComputeRayIntersection(data.mRayData, data.mRayData.mRay->mT);
|
---|
1348 |
|
---|
1349 | if (side == 0)
|
---|
1350 | {
|
---|
1351 | if (data.mRayData.mRay->HasPosDir(in->mAxis))
|
---|
1352 | {
|
---|
1353 | tstack.push(RayTraversalData(in->GetBack(),
|
---|
1354 | RayInfo(data.mRayData.mRay, data.mRayData.mMinT, data.mRayData.mRay->mT)));
|
---|
1355 |
|
---|
1356 | tstack.push(RayTraversalData(in->GetFront(),
|
---|
1357 | RayInfo(data.mRayData.mRay, data.mRayData.mRay->mT, data.mRayData.mMaxT)));
|
---|
1358 |
|
---|
1359 | }
|
---|
1360 | else
|
---|
1361 | {
|
---|
1362 | tstack.push(RayTraversalData(in->GetBack(),
|
---|
1363 | RayInfo(data.mRayData.mRay,
|
---|
1364 | data.mRayData.mRay->mT,
|
---|
1365 | data.mRayData.mMaxT)));
|
---|
1366 | tstack.push(RayTraversalData(in->GetFront(),
|
---|
1367 | RayInfo(data.mRayData.mRay,
|
---|
1368 | data.mRayData.mMinT,
|
---|
1369 | data.mRayData.mRay->mT)));
|
---|
1370 | }
|
---|
1371 | }
|
---|
1372 | else
|
---|
1373 | if (side == 1)
|
---|
1374 | tstack.push(RayTraversalData(in->GetFront(), data.mRayData));
|
---|
1375 | else
|
---|
1376 | tstack.push(RayTraversalData(in->GetBack(), data.mRayData));
|
---|
1377 | }
|
---|
1378 | else
|
---|
1379 | {
|
---|
1380 | // directional split
|
---|
1381 | if (data.mRayData.mRay->GetDirParametrization(in->mAxis - 3) > in->mPosition)
|
---|
1382 | tstack.push(RayTraversalData(in->GetFront(), data.mRayData));
|
---|
1383 | else
|
---|
1384 | tstack.push(RayTraversalData(in->GetBack(), data.mRayData));
|
---|
1385 | }
|
---|
1386 | }
|
---|
1387 |
|
---|
1388 |
|
---|
1389 | int VspKdTree::CollapseSubtree(VspKdTreeNode *sroot, const int time)
|
---|
1390 | {
|
---|
1391 | // first count all rays in the subtree
|
---|
1392 | // use mail 1 for this purpose
|
---|
1393 | stack<VspKdTreeNode *> tstack;
|
---|
1394 |
|
---|
1395 | int rayCount = 0;
|
---|
1396 | int totalRayCount = 0;
|
---|
1397 | int collapsedNodes = 0;
|
---|
1398 |
|
---|
1399 | #if DEBUG_COLLAPSE
|
---|
1400 | cout << "Collapsing subtree" << endl;
|
---|
1401 | cout << "accessTime=" << sroot->GetAccessTime() << endl;
|
---|
1402 | cout << "depth=" << (int)sroot->depth << endl;
|
---|
1403 | #endif
|
---|
1404 |
|
---|
1405 | // tstat.collapsedSubtrees++;
|
---|
1406 | // tstat.collapseDepths += (int)sroot->depth;
|
---|
1407 | // tstat.collapseAccessTimes += time - sroot->GetAccessTime();
|
---|
1408 | tstack.push(sroot);
|
---|
1409 | VssRay::NewMail();
|
---|
1410 |
|
---|
1411 | while (!tstack.empty())
|
---|
1412 | {
|
---|
1413 | ++ collapsedNodes;
|
---|
1414 |
|
---|
1415 | VspKdTreeNode *node = tstack.top();
|
---|
1416 | tstack.pop();
|
---|
1417 | if (node->IsLeaf())
|
---|
1418 | {
|
---|
1419 | VspKdTreeLeaf *leaf = (VspKdTreeLeaf *) node;
|
---|
1420 |
|
---|
1421 | for(RayInfoContainer::iterator ri = leaf->mRays.begin();
|
---|
1422 | ri != leaf->mRays.end(); ++ ri)
|
---|
1423 | {
|
---|
1424 | ++ totalRayCount;
|
---|
1425 |
|
---|
1426 | if ((*ri).mRay->IsActive() && !(*ri).mRay->Mailed())
|
---|
1427 | {
|
---|
1428 | (*ri).mRay->Mail();
|
---|
1429 | ++ rayCount;
|
---|
1430 | }
|
---|
1431 | }
|
---|
1432 | }
|
---|
1433 | else
|
---|
1434 | {
|
---|
1435 | tstack.push(((VspKdTreeInterior *)node)->GetFront());
|
---|
1436 | tstack.push(((VspKdTreeInterior *)node)->GetBack());
|
---|
1437 | }
|
---|
1438 | }
|
---|
1439 |
|
---|
1440 | VssRay::NewMail();
|
---|
1441 |
|
---|
1442 | // create a new node that will hold the rays
|
---|
1443 | VspKdTreeLeaf *newLeaf = new VspKdTreeLeaf(sroot->mParent, rayCount);
|
---|
1444 |
|
---|
1445 | if (newLeaf->mParent)
|
---|
1446 | newLeaf->mParent->ReplaceChildLink(sroot, newLeaf);
|
---|
1447 |
|
---|
1448 | tstack.push(sroot);
|
---|
1449 |
|
---|
1450 | while (!tstack.empty())
|
---|
1451 | {
|
---|
1452 | VspKdTreeNode *node = tstack.top();
|
---|
1453 | tstack.pop();
|
---|
1454 |
|
---|
1455 | if (node->IsLeaf())
|
---|
1456 | {
|
---|
1457 | VspKdTreeLeaf *leaf = dynamic_cast<VspKdTreeLeaf *>(node);
|
---|
1458 |
|
---|
1459 | for(RayInfoContainer::iterator ri = leaf->mRays.begin();
|
---|
1460 | ri != leaf->mRays.end(); ++ ri)
|
---|
1461 | {
|
---|
1462 | // unref this ray from the old node
|
---|
1463 | if ((*ri).mRay->IsActive())
|
---|
1464 | {
|
---|
1465 | (*ri).mRay->Unref();
|
---|
1466 | if (!(*ri).mRay->Mailed())
|
---|
1467 | {
|
---|
1468 | (*ri).mRay->Mail();
|
---|
1469 | newLeaf->AddRay(*ri);
|
---|
1470 | }
|
---|
1471 | }
|
---|
1472 | else
|
---|
1473 | (*ri).mRay->Unref();
|
---|
1474 | }
|
---|
1475 | }
|
---|
1476 | else
|
---|
1477 | {
|
---|
1478 | VspKdTreeInterior *interior =
|
---|
1479 | dynamic_cast<VspKdTreeInterior *>(node);
|
---|
1480 | tstack.push(interior->GetBack());
|
---|
1481 | tstack.push(interior->GetFront());
|
---|
1482 | }
|
---|
1483 | }
|
---|
1484 |
|
---|
1485 | // delete the node and all its children
|
---|
1486 | DEL_PTR(sroot);
|
---|
1487 |
|
---|
1488 | // for(VspKdTreeNode::SRayContainer::iterator ri = newleaf->mRays.begin();
|
---|
1489 | // ri != newleaf->mRays.end(); ++ ri)
|
---|
1490 | // (*ri).ray->UnMail(2);
|
---|
1491 |
|
---|
1492 | #if DEBUG_COLLAPSE
|
---|
1493 | cout << "Total memory before=" << GetMemUsage() << endl;
|
---|
1494 | #endif
|
---|
1495 |
|
---|
1496 | mStat.nodes -= collapsedNodes - 1;
|
---|
1497 | mStat.rayRefs -= totalRayCount - rayCount;
|
---|
1498 |
|
---|
1499 | #if DEBUG_COLLAPSE
|
---|
1500 | cout << "collapsed nodes" << collapsedNodes << endl;
|
---|
1501 | cout << "collapsed rays" << totalRayCount - rayCount << endl;
|
---|
1502 | cout << "Total memory after=" << GetMemUsage() << endl;
|
---|
1503 | cout << "================================" << endl;
|
---|
1504 | #endif
|
---|
1505 |
|
---|
1506 | // tstat.collapsedNodes += collapsedNodes;
|
---|
1507 | // tstat.collapsedRays += totalRayCount - rayCount;
|
---|
1508 | return totalRayCount - rayCount;
|
---|
1509 | }
|
---|
1510 |
|
---|
1511 |
|
---|
1512 | int VspKdTree::GetPvsSize(VspKdTreeNode *node, const AxisAlignedBox3 &box) const
|
---|
1513 | {
|
---|
1514 | stack<VspKdTreeNode *> tstack;
|
---|
1515 | tstack.push(mRoot);
|
---|
1516 |
|
---|
1517 | Intersectable::NewMail();
|
---|
1518 | int pvsSize = 0;
|
---|
1519 |
|
---|
1520 | while (!tstack.empty())
|
---|
1521 | {
|
---|
1522 | VspKdTreeNode *node = tstack.top();
|
---|
1523 | tstack.pop();
|
---|
1524 |
|
---|
1525 | if (node->IsLeaf())
|
---|
1526 | {
|
---|
1527 | VspKdTreeLeaf *leaf = (VspKdTreeLeaf *)node;
|
---|
1528 | for (RayInfoContainer::iterator ri = leaf->mRays.begin();
|
---|
1529 | ri != leaf->mRays.end(); ++ ri)
|
---|
1530 | {
|
---|
1531 | if ((*ri).mRay->IsActive())
|
---|
1532 | {
|
---|
1533 | Intersectable *object;
|
---|
1534 | #if BIDIRECTIONAL_RAY
|
---|
1535 | object = (*ri).mRay->mOriginObject;
|
---|
1536 |
|
---|
1537 | if (object && !object->Mailed())
|
---|
1538 | {
|
---|
1539 | ++ pvsSize;
|
---|
1540 | object->Mail();
|
---|
1541 | }
|
---|
1542 | #endif
|
---|
1543 | object = (*ri).mRay->mTerminationObject;
|
---|
1544 | if (object && !object->Mailed())
|
---|
1545 | {
|
---|
1546 | ++ pvsSize;
|
---|
1547 | object->Mail();
|
---|
1548 | }
|
---|
1549 | }
|
---|
1550 | }
|
---|
1551 | }
|
---|
1552 | else
|
---|
1553 | {
|
---|
1554 | VspKdTreeInterior *in = dynamic_cast<VspKdTreeInterior *>(node);
|
---|
1555 |
|
---|
1556 | if (in->mAxis < 3)
|
---|
1557 | {
|
---|
1558 | if (box.Max(in->mAxis) >= in->mPosition)
|
---|
1559 | tstack.push(in->GetFront());
|
---|
1560 |
|
---|
1561 | if (box.Min(in->mAxis) <= in->mPosition)
|
---|
1562 | tstack.push(in->GetBack());
|
---|
1563 | }
|
---|
1564 | else
|
---|
1565 | {
|
---|
1566 | // both nodes for directional splits
|
---|
1567 | tstack.push(in->GetFront());
|
---|
1568 | tstack.push(in->GetBack());
|
---|
1569 | }
|
---|
1570 | }
|
---|
1571 | }
|
---|
1572 |
|
---|
1573 | return pvsSize;
|
---|
1574 | }
|
---|
1575 |
|
---|
1576 | void VspKdTree::GetRayContributionStatistics(float &minRayContribution,
|
---|
1577 | float &maxRayContribution,
|
---|
1578 | float &avgRayContribution)
|
---|
1579 | {
|
---|
1580 | stack<VspKdTreeNode *> tstack;
|
---|
1581 | tstack.push(mRoot);
|
---|
1582 |
|
---|
1583 | minRayContribution = 1.0f;
|
---|
1584 | maxRayContribution = 0.0f;
|
---|
1585 |
|
---|
1586 | float sumRayContribution = 0.0f;
|
---|
1587 | int leaves = 0;
|
---|
1588 |
|
---|
1589 | while (!tstack.empty())
|
---|
1590 | {
|
---|
1591 | VspKdTreeNode *node = tstack.top();
|
---|
1592 | tstack.pop();
|
---|
1593 | if (node->IsLeaf())
|
---|
1594 | {
|
---|
1595 | leaves++;
|
---|
1596 | VspKdTreeLeaf *leaf = (VspKdTreeLeaf *)node;
|
---|
1597 | float c = leaf->GetAvgRayContribution();
|
---|
1598 |
|
---|
1599 | if (c > maxRayContribution)
|
---|
1600 | maxRayContribution = c;
|
---|
1601 | if (c < minRayContribution)
|
---|
1602 | minRayContribution = c;
|
---|
1603 | sumRayContribution += c;
|
---|
1604 |
|
---|
1605 | }
|
---|
1606 | else {
|
---|
1607 | VspKdTreeInterior *in = (VspKdTreeInterior *)node;
|
---|
1608 | // both nodes for directional splits
|
---|
1609 | tstack.push(in->GetFront());
|
---|
1610 | tstack.push(in->GetBack());
|
---|
1611 | }
|
---|
1612 | }
|
---|
1613 |
|
---|
1614 | Debug << "sum=" << sumRayContribution << endl;
|
---|
1615 | Debug << "leaves=" << leaves << endl;
|
---|
1616 | avgRayContribution = sumRayContribution / (float)leaves;
|
---|
1617 | }
|
---|
1618 |
|
---|
1619 |
|
---|
1620 | int VspKdTree::GenerateRays(const float ratioPerLeaf,
|
---|
1621 | SimpleRayContainer &rays)
|
---|
1622 | {
|
---|
1623 | stack<VspKdTreeNode *> tstack;
|
---|
1624 | tstack.push(mRoot);
|
---|
1625 |
|
---|
1626 | while (!tstack.empty())
|
---|
1627 | {
|
---|
1628 | VspKdTreeNode *node = tstack.top();
|
---|
1629 | tstack.pop();
|
---|
1630 |
|
---|
1631 | if (node->IsLeaf())
|
---|
1632 | {
|
---|
1633 | VspKdTreeLeaf *leaf = dynamic_cast<VspKdTreeLeaf *>(node);
|
---|
1634 |
|
---|
1635 | float c = leaf->GetAvgRayContribution();
|
---|
1636 | int num = (int)(c*ratioPerLeaf + 0.5);
|
---|
1637 | // cout<<num<<" ";
|
---|
1638 |
|
---|
1639 | for (int i=0; i < num; i++)
|
---|
1640 | {
|
---|
1641 | Vector3 origin = GetBBox(leaf).GetRandomPoint();
|
---|
1642 | /*Vector3 dirVector = GetDirBBox(leaf).GetRandomPoint();
|
---|
1643 | Vector3 direction = Vector3(sin(dirVector.x), sin(dirVector.y), cos(dirVector.x));
|
---|
1644 | //cout<<"dir vector.x="<<dirVector.x<<"direction'.x="<<atan2(direction.x, direction.y)<<endl;
|
---|
1645 | rays.push_back(SimpleRay(origin, direction));*/
|
---|
1646 | }
|
---|
1647 |
|
---|
1648 | }
|
---|
1649 | else
|
---|
1650 | {
|
---|
1651 | VspKdTreeInterior *in =
|
---|
1652 | dynamic_cast<VspKdTreeInterior *>(node);
|
---|
1653 | // both nodes for directional splits
|
---|
1654 | tstack.push(in->GetFront());
|
---|
1655 | tstack.push(in->GetBack());
|
---|
1656 | }
|
---|
1657 | }
|
---|
1658 |
|
---|
1659 | return (int)rays.size();
|
---|
1660 | }
|
---|
1661 |
|
---|
1662 |
|
---|
1663 | float VspKdTree::GetAvgPvsSize()
|
---|
1664 | {
|
---|
1665 | stack<VspKdTreeNode *> tstack;
|
---|
1666 | tstack.push(mRoot);
|
---|
1667 |
|
---|
1668 | int sumPvs = 0;
|
---|
1669 | int leaves = 0;
|
---|
1670 |
|
---|
1671 | while (!tstack.empty())
|
---|
1672 | {
|
---|
1673 | VspKdTreeNode *node = tstack.top();
|
---|
1674 | tstack.pop();
|
---|
1675 |
|
---|
1676 | if (node->IsLeaf())
|
---|
1677 | {
|
---|
1678 | VspKdTreeLeaf *leaf = (VspKdTreeLeaf *)node;
|
---|
1679 | // update pvs size
|
---|
1680 | leaf->UpdatePvsSize();
|
---|
1681 | sumPvs += leaf->GetPvsSize();
|
---|
1682 | leaves++;
|
---|
1683 | }
|
---|
1684 | else
|
---|
1685 | {
|
---|
1686 | VspKdTreeInterior *in = (VspKdTreeInterior *)node;
|
---|
1687 | // both nodes for directional splits
|
---|
1688 | tstack.push(in->GetFront());
|
---|
1689 | tstack.push(in->GetBack());
|
---|
1690 | }
|
---|
1691 | }
|
---|
1692 |
|
---|
1693 | return sumPvs / (float)leaves;
|
---|
1694 | }
|
---|
1695 |
|
---|
1696 | VspKdTreeNode *VspKdTree::GetRoot() const
|
---|
1697 | {
|
---|
1698 | return mRoot;
|
---|
1699 | }
|
---|
1700 |
|
---|
1701 | AxisAlignedBox3 VspKdTree::GetBBox(VspKdTreeNode *node) const
|
---|
1702 | {
|
---|
1703 | if (node->mParent == NULL)
|
---|
1704 | return mBox;
|
---|
1705 |
|
---|
1706 | if (!node->IsLeaf())
|
---|
1707 | return (dynamic_cast<VspKdTreeInterior *>(node))->mBox;
|
---|
1708 |
|
---|
1709 | if (node->mParent->mAxis >= 3)
|
---|
1710 | return node->mParent->mBox;
|
---|
1711 |
|
---|
1712 | AxisAlignedBox3 box(node->mParent->mBox);
|
---|
1713 | if (node->mParent->GetFront() == node)
|
---|
1714 | box.SetMin(node->mParent->mAxis, node->mParent->mPosition);
|
---|
1715 | else
|
---|
1716 | box.SetMax(node->mParent->mAxis, node->mParent->mPosition);
|
---|
1717 |
|
---|
1718 | return box;
|
---|
1719 | }
|
---|
1720 |
|
---|
1721 | int VspKdTree::GetRootPvsSize() const
|
---|
1722 | {
|
---|
1723 | return GetPvsSize(mRoot, mBox);
|
---|
1724 | }
|
---|
1725 |
|
---|
1726 | const VspKdStatistics &VspKdTree::GetStatistics() const
|
---|
1727 | {
|
---|
1728 | return mStat;
|
---|
1729 | }
|
---|
1730 |
|
---|
1731 | void VspKdTree::AddRays(VssRayContainer &add)
|
---|
1732 | {
|
---|
1733 | VssRayContainer remove;
|
---|
1734 | UpdateRays(remove, add);
|
---|
1735 | }
|
---|
1736 |
|
---|
1737 | // return memory usage in MB
|
---|
1738 | float VspKdTree::GetMemUsage() const
|
---|
1739 | {
|
---|
1740 | return
|
---|
1741 | (sizeof(VspKdTree) +
|
---|
1742 | mStat.Leaves() * sizeof(VspKdTreeLeaf) +
|
---|
1743 | mStat.Interior() * sizeof(VspKdTreeInterior) +
|
---|
1744 | mStat.rayRefs * sizeof(RayInfo)) / (1024.0f * 1024.0f);
|
---|
1745 | }
|
---|
1746 |
|
---|
1747 | float VspKdTree::GetRayMemUsage() const
|
---|
1748 | {
|
---|
1749 | return mStat.rays * (sizeof(VssRay))/(1024.0f * 1024.0f);
|
---|
1750 | }
|
---|
1751 |
|
---|
1752 | int VspKdTree::ComputePvsSize(VspKdTreeNode *node,
|
---|
1753 | const RayInfoContainer &globalRays) const
|
---|
1754 | {
|
---|
1755 | int pvsSize = 0;
|
---|
1756 |
|
---|
1757 | const AxisAlignedBox3 box = GetBBox(node);
|
---|
1758 |
|
---|
1759 | RayInfoContainer::const_iterator it, it_end = globalRays.end();
|
---|
1760 |
|
---|
1761 | // warning: implicit conversion from VssRay to Ray
|
---|
1762 | for (it = globalRays.begin(); it != globalRays.end(); ++ it)
|
---|
1763 | pvsSize += box.GetMinMaxT(*(*it).mRay, NULL, NULL);
|
---|
1764 |
|
---|
1765 | return pvsSize;
|
---|
1766 | }
|
---|
1767 |
|
---|
1768 | void VspKdTree::CollectLeaves(vector<VspKdTreeLeaf *> &leaves) const
|
---|
1769 | {
|
---|
1770 | stack<VspKdTreeNode *> nodeStack;
|
---|
1771 | nodeStack.push(mRoot);
|
---|
1772 |
|
---|
1773 | while (!nodeStack.empty())
|
---|
1774 | {
|
---|
1775 | VspKdTreeNode *node = nodeStack.top();
|
---|
1776 |
|
---|
1777 | nodeStack.pop();
|
---|
1778 |
|
---|
1779 | if (node->IsLeaf())
|
---|
1780 | {
|
---|
1781 | VspKdTreeLeaf *leaf = dynamic_cast<VspKdTreeLeaf *>(node);
|
---|
1782 | leaves.push_back(leaf);
|
---|
1783 | }
|
---|
1784 | else
|
---|
1785 | {
|
---|
1786 | VspKdTreeInterior *interior = dynamic_cast<VspKdTreeInterior *>(node);
|
---|
1787 |
|
---|
1788 | nodeStack.push(interior->GetBack());
|
---|
1789 | nodeStack.push(interior->GetFront());
|
---|
1790 | }
|
---|
1791 | }
|
---|
1792 | }
|
---|
1793 |
|
---|
1794 | int VspKdTree::FindNeighbors(VspKdTreeLeaf *n,
|
---|
1795 | vector<VspKdTreeLeaf *> &neighbors,
|
---|
1796 | bool onlyUnmailed)
|
---|
1797 | {
|
---|
1798 | stack<VspKdTreeNode *> nodeStack;
|
---|
1799 |
|
---|
1800 | nodeStack.push(mRoot);
|
---|
1801 |
|
---|
1802 | AxisAlignedBox3 box = GetBBox(n);
|
---|
1803 |
|
---|
1804 | while (!nodeStack.empty())
|
---|
1805 | {
|
---|
1806 | VspKdTreeNode *node = nodeStack.top();
|
---|
1807 | nodeStack.pop();
|
---|
1808 |
|
---|
1809 | if (node->IsLeaf())
|
---|
1810 | {
|
---|
1811 | VspKdTreeLeaf *leaf = dynamic_cast<VspKdTreeLeaf *>(node);
|
---|
1812 |
|
---|
1813 | if (leaf != n && (!onlyUnmailed || !leaf->Mailed()))
|
---|
1814 | neighbors.push_back(leaf);
|
---|
1815 | }
|
---|
1816 | else
|
---|
1817 | {
|
---|
1818 | VspKdTreeInterior *interior = dynamic_cast<VspKdTreeInterior *>(node);
|
---|
1819 |
|
---|
1820 | if (interior->mPosition > box.Max(interior->mAxis))
|
---|
1821 | nodeStack.push(interior->mBack);
|
---|
1822 | else
|
---|
1823 | {
|
---|
1824 | if (interior->mPosition < box.Min(interior->mAxis))
|
---|
1825 | nodeStack.push(interior->mFront);
|
---|
1826 | else
|
---|
1827 | {
|
---|
1828 | // random decision
|
---|
1829 | nodeStack.push(interior->mBack);
|
---|
1830 | nodeStack.push(interior->mFront);
|
---|
1831 | }
|
---|
1832 | }
|
---|
1833 | }
|
---|
1834 | }
|
---|
1835 |
|
---|
1836 | return (int)neighbors.size();
|
---|
1837 | }
|
---|
1838 |
|
---|
1839 | void VspKdTree::MergeLeaves()
|
---|
1840 | {
|
---|
1841 | vector<VspKdTreeLeaf *> leaves;
|
---|
1842 | priority_queue<LeafPair> mergeCandidates;
|
---|
1843 | vector<VspKdTreeLeaf *> neighbors;
|
---|
1844 |
|
---|
1845 | CollectLeaves(leaves);
|
---|
1846 |
|
---|
1847 | VspKdTreeLeaf::NewMail();
|
---|
1848 |
|
---|
1849 | vector<VspKdTreeLeaf *>::const_iterator it, it_end = leaves.end();
|
---|
1850 |
|
---|
1851 |
|
---|
1852 | for (it = leaves.begin(); it != it_end; ++ it)
|
---|
1853 | {
|
---|
1854 | VspKdTreeLeaf *leaf = *it;
|
---|
1855 |
|
---|
1856 | if (!leaf->Mailed())
|
---|
1857 | {
|
---|
1858 | FindNeighbors(leaf, neighbors, true);
|
---|
1859 |
|
---|
1860 | vector<VspKdTreeLeaf *>::const_iterator nit, nit_end = neighbors.end();
|
---|
1861 |
|
---|
1862 | for (nit = neighbors.begin(); nit != neighbors.end(); ++ nit)
|
---|
1863 | mergeCandidates.push(LeafPair(leaf, *nit));
|
---|
1864 |
|
---|
1865 | leaf->Mail();
|
---|
1866 | }
|
---|
1867 | }
|
---|
1868 | }
|
---|
1869 |
|
---|
1870 |
|
---|
1871 |
|
---|
1872 | /*********************************************************************/
|
---|
1873 | /* MergeCandidate implementation */
|
---|
1874 | /*********************************************************************/
|
---|
1875 |
|
---|
1876 |
|
---|
1877 | MergeCandidate::MergeCandidate(VspKdTreeLeaf *l1, VspKdTreeLeaf *l2):
|
---|
1878 | mLeaf1(l1), mLeaf2(l2)
|
---|
1879 | {}
|
---|
1880 |
|
---|
1881 | float MergeCandidate::EvaluateMergeCost() const
|
---|
1882 | {
|
---|
1883 | // pvs difference
|
---|
1884 | VspKdViewCell *vc1 = dynamic_cast<VspKdViewCell *>(mLeaf1->GetViewCell()); |
---|
1885 | VspKdViewCell *vc2 = dynamic_cast<VspKdViewCell *>(mLeaf2->GetViewCell());
|
---|
1886 |
|
---|
1887 | const int diff1 = vc1->GetPvs().Diff(vc2->GetPvs()); |
---|
1888 |
|
---|
1889 | //const int diff2 = vc2->GetPvs().Diff(vc1->GetPvs());
|
---|
1890 | //const float simDiff = (float)max(diff1, diff2);
|
---|
1891 |
|
---|
1892 | const float oldCost =
|
---|
1893 | vc1->GetSize() * vc1->GetPvs().GetSize() +
|
---|
1894 | vc2->GetSize() * vc2->GetPvs().GetSize();
|
---|
1895 |
|
---|
1896 | const float mergedPvsCost =
|
---|
1897 | (diff1 + vc1->GetPvs().GetSize()) *
|
---|
1898 | (vc1->GetSize() + vc2->GetSize());
|
---|
1899 |
|
---|
1900 | return mergedPvsCost / oldCost;
|
---|
1901 | } |
---|