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 "VssTree.h"
|
---|
21 |
|
---|
22 | #include "Environment.h"
|
---|
23 | #include "VssRay.h"
|
---|
24 | #include "Intersectable.h"
|
---|
25 | #include "Ray.h"
|
---|
26 | #include "SamplingStrategy.h"
|
---|
27 |
|
---|
28 | namespace GtpVisibilityPreprocessor {
|
---|
29 |
|
---|
30 | #define DEBUG_SPLIT_COST 0
|
---|
31 |
|
---|
32 | // Static variables
|
---|
33 | int
|
---|
34 | VssTreeLeaf::mailID = 0;
|
---|
35 |
|
---|
36 | inline void
|
---|
37 | AddObject2Pvs(Intersectable *object,
|
---|
38 | const int side,
|
---|
39 | int &pvsBack,
|
---|
40 | int &pvsFront)
|
---|
41 | {
|
---|
42 |
|
---|
43 | if (!object)
|
---|
44 | return;
|
---|
45 |
|
---|
46 | if (side <= 0) {
|
---|
47 | if (!object->Mailed() && !object->Mailed(2)) {
|
---|
48 | pvsBack++;
|
---|
49 | if (object->Mailed(1))
|
---|
50 | object->Mail(2);
|
---|
51 | else
|
---|
52 | object->Mail();
|
---|
53 | }
|
---|
54 | }
|
---|
55 |
|
---|
56 | if (side >= 0) {
|
---|
57 | if (!object->Mailed(1) && !object->Mailed(2)) {
|
---|
58 | pvsFront++;
|
---|
59 | if (object->Mailed())
|
---|
60 | object->Mail(2);
|
---|
61 | else
|
---|
62 | object->Mail(1);
|
---|
63 | }
|
---|
64 | }
|
---|
65 | }
|
---|
66 |
|
---|
67 | // Constructor
|
---|
68 | VssTree::VssTree()
|
---|
69 | {
|
---|
70 | Environment::GetSingleton()->GetIntValue("VssTree.maxDepth", termMaxDepth);
|
---|
71 | Environment::GetSingleton()->GetIntValue("VssTree.minPvs", termMinPvs);
|
---|
72 | Environment::GetSingleton()->GetIntValue("VssTree.minRays", termMinRays);
|
---|
73 | Environment::GetSingleton()->GetFloatValue("VssTree.maxRayContribution", termMaxRayContribution);
|
---|
74 | Environment::GetSingleton()->GetFloatValue("VssTree.maxCostRatio", termMaxCostRatio);
|
---|
75 |
|
---|
76 | Environment::GetSingleton()->GetFloatValue("VssTree.minSize", termMinSize);
|
---|
77 | termMinSize = sqr(termMinSize);
|
---|
78 |
|
---|
79 | Environment::GetSingleton()->GetFloatValue("VssTree.refDirBoxMaxSize", refDirBoxMaxSize);
|
---|
80 | refDirBoxMaxSize = sqr(refDirBoxMaxSize);
|
---|
81 |
|
---|
82 | Environment::GetSingleton()->GetFloatValue("VssTree.epsilon", epsilon);
|
---|
83 | Environment::GetSingleton()->GetFloatValue("VssTree.ct_div_ci", ct_div_ci);
|
---|
84 |
|
---|
85 | Environment::GetSingleton()->GetFloatValue("VssTree.maxTotalMemory", maxTotalMemory);
|
---|
86 | Environment::GetSingleton()->GetFloatValue("VssTree.maxStaticMemory", maxStaticMemory);
|
---|
87 |
|
---|
88 |
|
---|
89 |
|
---|
90 |
|
---|
91 | float refDirAngle;
|
---|
92 | Environment::GetSingleton()->GetFloatValue("VssTree.refDirAngle", refDirAngle);
|
---|
93 |
|
---|
94 | Environment::GetSingleton()->GetIntValue("VssTree.accessTimeThreshold", accessTimeThreshold);
|
---|
95 | //= 1000;
|
---|
96 | Environment::GetSingleton()->GetIntValue("VssTree.minCollapseDepth", minCollapseDepth);
|
---|
97 | // int minCollapseDepth = 4;
|
---|
98 |
|
---|
99 | // pRefDirThresh = cos(0.5*M_PI - M_PI*refDirAngle/180.0);
|
---|
100 | // cosRefDir = cos(M_PI*refDirAngle/180.0);
|
---|
101 | // sinRefDir = sin(M_PI*refDirAngle/180.0);
|
---|
102 |
|
---|
103 |
|
---|
104 | // split type
|
---|
105 | char sname[128];
|
---|
106 | Environment::GetSingleton()->GetStringValue("VssTree.splitType", sname);
|
---|
107 | string name(sname);
|
---|
108 |
|
---|
109 | if (name.compare("regular") == 0)
|
---|
110 | splitType = ESplitRegular;
|
---|
111 | else
|
---|
112 | if (name.compare("heuristic") == 0)
|
---|
113 | splitType = ESplitHeuristic;
|
---|
114 | else
|
---|
115 | if (name.compare("hybrid") == 0)
|
---|
116 | splitType = ESplitHybrid;
|
---|
117 | else {
|
---|
118 | cerr<<"Invalid VssTree split type "<<name<<endl;
|
---|
119 | exit(1);
|
---|
120 | }
|
---|
121 |
|
---|
122 | Environment::GetSingleton()->GetBoolValue("VssTree.randomize", randomize);
|
---|
123 | Environment::GetSingleton()->GetBoolValue("VssTree.splitUseOnlyDrivingAxis", mSplitUseOnlyDrivingAxis);
|
---|
124 | Environment::GetSingleton()->GetBoolValue("VssTree.useRss", mUseRss);
|
---|
125 |
|
---|
126 | Environment::GetSingleton()->GetBoolValue("VssTree.interleaveDirSplits", mInterleaveDirSplits);
|
---|
127 | Environment::GetSingleton()->GetIntValue("VssTree.dirSplitDepth", mDirSplitDepth);
|
---|
128 |
|
---|
129 | root = NULL;
|
---|
130 |
|
---|
131 | splitCandidates = new vector<SortableEntry>;
|
---|
132 | }
|
---|
133 |
|
---|
134 |
|
---|
135 | VssTree::~VssTree()
|
---|
136 | {
|
---|
137 | if (root)
|
---|
138 | delete root;
|
---|
139 | }
|
---|
140 |
|
---|
141 |
|
---|
142 |
|
---|
143 |
|
---|
144 | void
|
---|
145 | VssStatistics::Print(ostream &app) const
|
---|
146 | {
|
---|
147 | app << "===== VssTree statistics ===============\n";
|
---|
148 |
|
---|
149 | app << "#N_RAYS ( Number of rays )\n"
|
---|
150 | << rays <<endl;
|
---|
151 |
|
---|
152 | app << "#N_INITPVS ( Initial PVS size )\n"
|
---|
153 | << initialPvsSize <<endl;
|
---|
154 |
|
---|
155 | app << "#N_NODES ( Number of nodes )\n" << nodes << "\n";
|
---|
156 |
|
---|
157 | app << "#N_LEAVES ( Number of leaves )\n" << Leaves() << "\n";
|
---|
158 |
|
---|
159 | app << "#N_SPLITS ( Number of splits in axes x y z dx dy dz)\n";
|
---|
160 | for (int i=0; i<7; i++)
|
---|
161 | app << splits[i] <<" ";
|
---|
162 | app <<endl;
|
---|
163 |
|
---|
164 | app << "#N_RAYREFS ( Number of rayRefs )\n" <<
|
---|
165 | rayRefs << "\n";
|
---|
166 |
|
---|
167 | app << "#N_RAYRAYREFS ( Number of rayRefs / ray )\n" <<
|
---|
168 | rayRefs/(double)rays << "\n";
|
---|
169 |
|
---|
170 | app << "#N_LEAFRAYREFS ( Number of rayRefs / leaf )\n" <<
|
---|
171 | rayRefs/(double)Leaves() << "\n";
|
---|
172 |
|
---|
173 | app << "#N_MAXRAYREFS ( Max number of rayRefs / leaf )\n" <<
|
---|
174 | maxRayRefs << "\n";
|
---|
175 |
|
---|
176 |
|
---|
177 | // app << setprecision(4);
|
---|
178 |
|
---|
179 | app << "#N_PMAXDEPTHLEAVES ( Percentage of leaves at maxdepth )\n"<<
|
---|
180 | maxDepthNodes*100/(double)Leaves()<<endl;
|
---|
181 |
|
---|
182 | app << "#N_PMINPVSLEAVES ( Percentage of leaves with minPvs )\n"<<
|
---|
183 | minPvsNodes*100/(double)Leaves()<<endl;
|
---|
184 |
|
---|
185 | app << "#N_PMINRAYSLEAVES ( Percentage of leaves with minRays )\n"<<
|
---|
186 | minRaysNodes*100/(double)Leaves()<<endl;
|
---|
187 |
|
---|
188 | app << "#N_PMINSIZELEAVES ( Percentage of leaves with minSize )\n"<<
|
---|
189 | minSizeNodes*100/(double)Leaves()<<endl;
|
---|
190 |
|
---|
191 | app << "#N_PMAXRAYCONTRIBLEAVES ( Percentage of leaves with maximal ray contribution )\n"<<
|
---|
192 | maxRayContribNodes*100/(double)Leaves()<<endl;
|
---|
193 |
|
---|
194 | app << "#N_PMAXCOSTRATIOLEAVES ( Percentage of leaves with max cost ratio )\n"<<
|
---|
195 | maxCostRatioNodes*100/(double)Leaves()<<endl;
|
---|
196 |
|
---|
197 | app << "#N_ADDED_RAYREFS (Number of dynamically added ray references )\n"<<
|
---|
198 | addedRayRefs<<endl;
|
---|
199 |
|
---|
200 | app << "#N_REMOVED_RAYREFS (Number of dynamically removed ray references )\n"<<
|
---|
201 | removedRayRefs<<endl;
|
---|
202 |
|
---|
203 | // app << setprecision(4);
|
---|
204 |
|
---|
205 | app << "#N_CTIME ( Construction time [s] )\n"
|
---|
206 | << Time() << " \n";
|
---|
207 |
|
---|
208 | app << "===== END OF VssTree statistics ==========\n";
|
---|
209 |
|
---|
210 | }
|
---|
211 |
|
---|
212 |
|
---|
213 | void
|
---|
214 | VssTreeLeaf::UpdatePvsSize()
|
---|
215 | {
|
---|
216 | if (!mValidPvs) {
|
---|
217 | Intersectable::NewMail();
|
---|
218 | int pvsSize = 0;
|
---|
219 | for(VssTreeNode::RayInfoContainer::iterator ri = rays.begin();
|
---|
220 | ri != rays.end();
|
---|
221 | ri++)
|
---|
222 | if ((*ri).mRay->IsActive()) {
|
---|
223 | Intersectable *object;
|
---|
224 | #if BIDIRECTIONAL_RAY
|
---|
225 | object = (*ri).mRay->mOriginObject;
|
---|
226 | if (object && !object->Mailed()) {
|
---|
227 | pvsSize++;
|
---|
228 | object->Mail();
|
---|
229 | }
|
---|
230 | #endif
|
---|
231 | object = (*ri).mRay->mTerminationObject;
|
---|
232 | if (object && !object->Mailed()) {
|
---|
233 | pvsSize++;
|
---|
234 | object->Mail();
|
---|
235 | }
|
---|
236 | }
|
---|
237 | mPvsSize = pvsSize;
|
---|
238 | mValidPvs = true;
|
---|
239 |
|
---|
240 | }
|
---|
241 | }
|
---|
242 |
|
---|
243 | bool
|
---|
244 | VssTree::ClipRay(
|
---|
245 | VssTreeNode::RayInfo &rayInfo,
|
---|
246 | const AxisAlignedBox3 &box
|
---|
247 | )
|
---|
248 | {
|
---|
249 | float tmin, tmax;
|
---|
250 | static Ray ray;
|
---|
251 | ray.Init(rayInfo.mRay->GetOrigin(), rayInfo.mRay->GetDir(), Ray::LINE_SEGMENT);
|
---|
252 | box.ComputeMinMaxT(ray, &tmin, &tmax);
|
---|
253 | if (tmin >= tmax)
|
---|
254 | return false;
|
---|
255 |
|
---|
256 | if (tmin > 0.0f)
|
---|
257 | rayInfo.SetMinT(tmin);
|
---|
258 |
|
---|
259 | if (tmax < 1.0f)
|
---|
260 | rayInfo.SetMaxT(tmax);
|
---|
261 |
|
---|
262 | // vssRay->SetupEndPoints(
|
---|
263 | // origin,
|
---|
264 | // termination
|
---|
265 | // );
|
---|
266 | return true;
|
---|
267 | }
|
---|
268 |
|
---|
269 |
|
---|
270 | void
|
---|
271 | VssTree::Construct(
|
---|
272 | VssRayContainer &rays,
|
---|
273 | AxisAlignedBox3 *forcedBoundingBox
|
---|
274 | )
|
---|
275 | {
|
---|
276 | stat.Start();
|
---|
277 |
|
---|
278 | maxMemory = maxStaticMemory;
|
---|
279 |
|
---|
280 | if (root)
|
---|
281 | delete root;
|
---|
282 |
|
---|
283 | root = new VssTreeLeaf(NULL, (int)rays.size());
|
---|
284 | // first construct a leaf that will get subdivide
|
---|
285 | VssTreeLeaf *leaf = (VssTreeLeaf *) root;
|
---|
286 |
|
---|
287 | stat.nodes = 1;
|
---|
288 |
|
---|
289 | bbox.Initialize();
|
---|
290 | dirBBox.Initialize();
|
---|
291 |
|
---|
292 | if (mUseRss)
|
---|
293 | forcedBoundingBox = NULL;
|
---|
294 |
|
---|
295 | for(VssRayContainer::const_iterator ri = rays.begin();
|
---|
296 | ri != rays.end();
|
---|
297 | ri++) {
|
---|
298 |
|
---|
299 | VssTreeNode::RayInfo info(*ri);
|
---|
300 | if (forcedBoundingBox)
|
---|
301 | if (!ClipRay(info, *forcedBoundingBox))
|
---|
302 | continue;
|
---|
303 | leaf->AddRay(info);
|
---|
304 |
|
---|
305 | bbox.Include((*ri)->GetOrigin());
|
---|
306 | bbox.Include((*ri)->GetTermination());
|
---|
307 |
|
---|
308 |
|
---|
309 | dirBBox.Include(Vector3(
|
---|
310 | (*ri)->GetDirParametrization(0),
|
---|
311 | (*ri)->GetDirParametrization(1),
|
---|
312 | 0
|
---|
313 | )
|
---|
314 | );
|
---|
315 | }
|
---|
316 |
|
---|
317 |
|
---|
318 | if ( forcedBoundingBox )
|
---|
319 | bbox = *forcedBoundingBox;
|
---|
320 |
|
---|
321 | cout<<"Bbox = "<<bbox<<endl;
|
---|
322 | cout<<"Dirr Bbox = "<<dirBBox<<endl;
|
---|
323 |
|
---|
324 | stat.rays = (int)leaf->rays.size();
|
---|
325 | leaf->UpdatePvsSize();
|
---|
326 | leaf->ComputeEntropyImportance();
|
---|
327 |
|
---|
328 | stat.initialPvsSize = leaf->GetPvsSize();
|
---|
329 | // Subdivide();
|
---|
330 | root = Subdivide(TraversalData(leaf, bbox, 0));
|
---|
331 |
|
---|
332 | if (splitCandidates) {
|
---|
333 | // force realease of this vector
|
---|
334 | delete splitCandidates;
|
---|
335 | splitCandidates = new vector<SortableEntry>;
|
---|
336 | }
|
---|
337 |
|
---|
338 | stat.Stop();
|
---|
339 |
|
---|
340 | stat.Print(cout);
|
---|
341 | cout<<"#Total memory="<<GetMemUsage()<<endl;
|
---|
342 |
|
---|
343 | }
|
---|
344 |
|
---|
345 | int
|
---|
346 | VssTree::UpdateSubdivision()
|
---|
347 | {
|
---|
348 | priority_queue<TraversalData> tStack;
|
---|
349 | // stack<TraversalData> tStack;
|
---|
350 |
|
---|
351 | tStack.push(TraversalData(root, bbox, 0));
|
---|
352 |
|
---|
353 | AxisAlignedBox3 backBox;
|
---|
354 | AxisAlignedBox3 frontBox;
|
---|
355 |
|
---|
356 | maxMemory = maxTotalMemory;
|
---|
357 | int subdivided = 0;
|
---|
358 | int lastMem = 0;
|
---|
359 | while (!tStack.empty()) {
|
---|
360 |
|
---|
361 | float mem = GetMemUsage();
|
---|
362 |
|
---|
363 | if ( lastMem/10 != ((int)mem)/10) {
|
---|
364 | cout<<mem<<" MB"<<endl;
|
---|
365 | }
|
---|
366 | lastMem = (int)mem;
|
---|
367 |
|
---|
368 | if ( mem > maxMemory ) {
|
---|
369 | // count statistics on unprocessed leafs
|
---|
370 | while (!tStack.empty()) {
|
---|
371 | // EvaluateLeafStats(tStack.top());
|
---|
372 | tStack.pop();
|
---|
373 | }
|
---|
374 | break;
|
---|
375 | }
|
---|
376 |
|
---|
377 | TraversalData data = tStack.top();
|
---|
378 | tStack.pop();
|
---|
379 |
|
---|
380 | if (data.node->IsLeaf()) {
|
---|
381 | VssTreeNode *node = SubdivideNode((VssTreeLeaf *) data.node,
|
---|
382 | data.bbox,
|
---|
383 | backBox,
|
---|
384 | frontBox
|
---|
385 | );
|
---|
386 | if (!node->IsLeaf()) {
|
---|
387 | subdivided++;
|
---|
388 | VssTreeInterior *interior = (VssTreeInterior *) node;
|
---|
389 | // push the children on the stack
|
---|
390 | tStack.push(TraversalData(interior->back, backBox, data.depth+1));
|
---|
391 | tStack.push(TraversalData(interior->front, frontBox, data.depth+1));
|
---|
392 | } else {
|
---|
393 | // EvaluateLeafStats(data);
|
---|
394 | }
|
---|
395 | } else {
|
---|
396 | VssTreeInterior *interior = (VssTreeInterior *) data.node;
|
---|
397 | tStack.push(TraversalData(interior->back, GetBBox(interior->back), data.depth+1));
|
---|
398 | tStack.push(TraversalData(interior->front, GetBBox(interior->front), data.depth+1));
|
---|
399 | }
|
---|
400 | }
|
---|
401 | return subdivided;
|
---|
402 | }
|
---|
403 |
|
---|
404 |
|
---|
405 | VssTreeNode *
|
---|
406 | VssTree::Subdivide(const TraversalData &tdata)
|
---|
407 | {
|
---|
408 | VssTreeNode *result = NULL;
|
---|
409 |
|
---|
410 | priority_queue<TraversalData> tStack;
|
---|
411 | // stack<TraversalData> tStack;
|
---|
412 |
|
---|
413 | tStack.push(tdata);
|
---|
414 |
|
---|
415 | AxisAlignedBox3 backBox;
|
---|
416 | AxisAlignedBox3 frontBox;
|
---|
417 |
|
---|
418 |
|
---|
419 | int lastMem = 0;
|
---|
420 | while (!tStack.empty()) {
|
---|
421 |
|
---|
422 | float mem = GetMemUsage();
|
---|
423 |
|
---|
424 | if ( lastMem/10 != ((int)mem)/10) {
|
---|
425 | cout<<mem<<" MB"<<endl;
|
---|
426 | }
|
---|
427 | lastMem = (int)mem;
|
---|
428 |
|
---|
429 | if ( mem > maxMemory ) {
|
---|
430 | // count statistics on unprocessed leafs
|
---|
431 | while (!tStack.empty()) {
|
---|
432 | EvaluateLeafStats(tStack.top());
|
---|
433 | tStack.pop();
|
---|
434 | }
|
---|
435 | break;
|
---|
436 | }
|
---|
437 |
|
---|
438 | TraversalData data = tStack.top();
|
---|
439 | tStack.pop();
|
---|
440 |
|
---|
441 | VssTreeNode *node = SubdivideNode((VssTreeLeaf *) data.node,
|
---|
442 | data.bbox,
|
---|
443 | backBox,
|
---|
444 | frontBox
|
---|
445 | );
|
---|
446 | if (result == NULL)
|
---|
447 | result = node;
|
---|
448 |
|
---|
449 | if (!node->IsLeaf()) {
|
---|
450 |
|
---|
451 | VssTreeInterior *interior = (VssTreeInterior *) node;
|
---|
452 | // push the children on the stack
|
---|
453 | tStack.push(TraversalData(interior->back, backBox, data.depth+1));
|
---|
454 | tStack.push(TraversalData(interior->front, frontBox, data.depth+1));
|
---|
455 |
|
---|
456 | } else {
|
---|
457 | EvaluateLeafStats(data);
|
---|
458 | }
|
---|
459 | }
|
---|
460 |
|
---|
461 | return result;
|
---|
462 | }
|
---|
463 |
|
---|
464 |
|
---|
465 | // returns selected plane for subdivision
|
---|
466 | int
|
---|
467 | VssTree::SelectPlane(
|
---|
468 | VssTreeLeaf *leaf,
|
---|
469 | const AxisAlignedBox3 &box,
|
---|
470 | float &position,
|
---|
471 | int &raysBack,
|
---|
472 | int &raysFront,
|
---|
473 | int &pvsBack,
|
---|
474 | int &pvsFront
|
---|
475 | )
|
---|
476 | {
|
---|
477 |
|
---|
478 | int minDirDepth = 6;
|
---|
479 | int axis;
|
---|
480 | float costRatio;
|
---|
481 |
|
---|
482 | costRatio = BestCostRatio(leaf,
|
---|
483 | axis,
|
---|
484 | position,
|
---|
485 | raysBack,
|
---|
486 | raysFront,
|
---|
487 | pvsBack,
|
---|
488 | pvsFront
|
---|
489 | );
|
---|
490 | #if DEBUG_SPLIT_COST
|
---|
491 | cout<<axis<<" r="<<costRatio<<endl;
|
---|
492 | #endif
|
---|
493 | if (costRatio > termMaxCostRatio) {
|
---|
494 | // cout<<"Too big cost ratio "<<costRatio<<endl;
|
---|
495 | stat.maxCostRatioNodes++;
|
---|
496 | return -1;
|
---|
497 | }
|
---|
498 |
|
---|
499 | #if 0
|
---|
500 | cout<<
|
---|
501 | "pvs="<<leaf->mPvsSize<<
|
---|
502 | " rays="<<leaf->rays.size()<<
|
---|
503 | " rc="<<leaf->GetAvgRayContribution()<<
|
---|
504 | " axis="<<axis<<endl;
|
---|
505 | #endif
|
---|
506 |
|
---|
507 | return axis;
|
---|
508 | }
|
---|
509 |
|
---|
510 |
|
---|
511 | float
|
---|
512 | VssTree::GetCostRatio(
|
---|
513 | VssTreeLeaf *leaf,
|
---|
514 | const int axis,
|
---|
515 | const float position,
|
---|
516 | const int raysBack,
|
---|
517 | const int raysFront,
|
---|
518 | const int pvsBack,
|
---|
519 | const int pvsFront
|
---|
520 | )
|
---|
521 | {
|
---|
522 | bool costImportance = true;
|
---|
523 |
|
---|
524 | float ratio;
|
---|
525 | AxisAlignedBox3 box;
|
---|
526 | float minBox, maxBox;
|
---|
527 |
|
---|
528 | if (axis < 3) {
|
---|
529 | box = GetBBox(leaf);
|
---|
530 | minBox = box.Min(axis);
|
---|
531 | maxBox = box.Max(axis);
|
---|
532 | } else {
|
---|
533 | box = GetDirBBox(leaf);
|
---|
534 | minBox = box.Min(axis-3);
|
---|
535 | maxBox = box.Max(axis-3);
|
---|
536 | }
|
---|
537 |
|
---|
538 | float sizeBox = maxBox - minBox;
|
---|
539 |
|
---|
540 | int pvsSize = leaf->GetPvsSize();
|
---|
541 |
|
---|
542 | if (!costImportance) {
|
---|
543 | // float sum = raysBack*(position - minBox) + raysFront*(maxBox - position);
|
---|
544 | float sum = pvsBack*(position - minBox) + pvsFront*(maxBox - position);
|
---|
545 | float newCost = ct_div_ci + sum/sizeBox;
|
---|
546 | float oldCost = (float)pvsSize;
|
---|
547 | ratio = newCost/oldCost;
|
---|
548 |
|
---|
549 | } else {
|
---|
550 | // importance based cost
|
---|
551 | #if 0
|
---|
552 | float newContrib =
|
---|
553 | ((position - minBox)*sqr(pvsBack/(raysBack + Limits::Small)) +
|
---|
554 | (maxBox - position)*sqr(pvsFront/(raysFront + Limits::Small)))/sizeBox;
|
---|
555 |
|
---|
556 | // float newContrib =
|
---|
557 | // sqr(pvsBack/(raysBack + Limits::Small)) +
|
---|
558 | // sqr(pvsFront/(raysFront + Limits::Small));
|
---|
559 | float oldContrib = sqr(leaf->GetAvgRayContribution());
|
---|
560 | ratio = oldContrib/newContrib;
|
---|
561 | #else
|
---|
562 | #if 1
|
---|
563 | float newCost = float(raysBack*pvsBack + raysFront*pvsFront);
|
---|
564 | float oldCost = (float)leaf->rays.size()*pvsSize;
|
---|
565 | ratio = newCost/oldCost;
|
---|
566 | #else
|
---|
567 | float newCost = (pvsBack + pvsFront)*0.5f;
|
---|
568 | float oldCost = pvsSize;
|
---|
569 | ratio = newCost/oldCost;
|
---|
570 | #endif
|
---|
571 | #endif
|
---|
572 | }
|
---|
573 |
|
---|
574 | return ratio;
|
---|
575 | }
|
---|
576 |
|
---|
577 |
|
---|
578 | float
|
---|
579 | VssTree::EvalCostRatio(
|
---|
580 | VssTreeLeaf *leaf,
|
---|
581 | const int axis,
|
---|
582 | const float position,
|
---|
583 | int &raysBack,
|
---|
584 | int &raysFront,
|
---|
585 | int &pvsBack,
|
---|
586 | int &pvsFront
|
---|
587 | )
|
---|
588 | {
|
---|
589 | raysBack = 0;
|
---|
590 | raysFront = 0;
|
---|
591 | pvsFront = 0;
|
---|
592 | pvsBack = 0;
|
---|
593 |
|
---|
594 |
|
---|
595 | Intersectable::NewMail(3);
|
---|
596 |
|
---|
597 | if (axis <= VssTreeNode::SPLIT_Z) {
|
---|
598 | // this is the main ray classification loop!
|
---|
599 | for(VssTreeNode::RayInfoContainer::iterator ri = leaf->rays.begin();
|
---|
600 | ri != leaf->rays.end();
|
---|
601 | ri++)
|
---|
602 | if ((*ri).mRay->IsActive()) {
|
---|
603 | float t;
|
---|
604 | // determine the side of this ray with respect to the plane
|
---|
605 | int side = (*ri).ComputeRayIntersection(axis, position, t);
|
---|
606 | // (*ri).mRay->mSide = side;
|
---|
607 |
|
---|
608 | if (side <= 0)
|
---|
609 | raysBack++;
|
---|
610 |
|
---|
611 | if (side >= 0)
|
---|
612 | raysFront++;
|
---|
613 |
|
---|
614 | AddObject2Pvs((*ri).mRay->mTerminationObject, side, pvsBack, pvsFront);
|
---|
615 | }
|
---|
616 |
|
---|
617 | } else {
|
---|
618 |
|
---|
619 | // directional split
|
---|
620 | for(VssTreeNode::RayInfoContainer::iterator ri = leaf->rays.begin();
|
---|
621 | ri != leaf->rays.end();
|
---|
622 | ri++)
|
---|
623 | if ((*ri).mRay->IsActive()) {
|
---|
624 |
|
---|
625 | // determine the side of this ray with respect to the plane
|
---|
626 | int side;
|
---|
627 | if ((*ri).mRay->GetDirParametrization(axis - 3) > position)
|
---|
628 | side = 1;
|
---|
629 | else
|
---|
630 | side = -1;
|
---|
631 |
|
---|
632 | if (side <= 0)
|
---|
633 | raysBack++;
|
---|
634 |
|
---|
635 | if (side >= 0)
|
---|
636 | raysFront++;
|
---|
637 |
|
---|
638 | // (*ri).mRay->mSide = side;
|
---|
639 | AddObject2Pvs((*ri).mRay->mTerminationObject, side, pvsBack, pvsFront);
|
---|
640 |
|
---|
641 | }
|
---|
642 | }
|
---|
643 |
|
---|
644 | float ratio = GetCostRatio(
|
---|
645 | leaf,
|
---|
646 | axis,
|
---|
647 | position,
|
---|
648 | raysBack,
|
---|
649 | raysFront,
|
---|
650 | pvsBack,
|
---|
651 | pvsFront);
|
---|
652 |
|
---|
653 | // cout<<axis<<" "<<pvsSize<<" "<<pvsBack<<" "<<pvsFront<<endl;
|
---|
654 | // float oldCost = leaf->rays.size();
|
---|
655 |
|
---|
656 | // cout<<"ratio="<<ratio<<endl;
|
---|
657 |
|
---|
658 | return ratio;
|
---|
659 | }
|
---|
660 |
|
---|
661 | float
|
---|
662 | VssTree::BestCostRatio(
|
---|
663 | VssTreeLeaf *leaf,
|
---|
664 | int &axis,
|
---|
665 | float &position,
|
---|
666 | int &raysBack,
|
---|
667 | int &raysFront,
|
---|
668 | int &pvsBack,
|
---|
669 | int &pvsFront
|
---|
670 | )
|
---|
671 | {
|
---|
672 | int nRaysBack[6], nRaysFront[6];
|
---|
673 | int nPvsBack[6], nPvsFront[6];
|
---|
674 | float nPosition[6];
|
---|
675 | float nCostRatio[6];
|
---|
676 | int bestAxis = -1;
|
---|
677 |
|
---|
678 | AxisAlignedBox3 sBox = GetBBox(leaf);
|
---|
679 | AxisAlignedBox3 dBox = GetDirBBox(leaf);
|
---|
680 | // int sAxis = box.Size().DrivingAxis();
|
---|
681 | int sAxis = sBox.Size().DrivingAxis();
|
---|
682 | int dAxis = dBox.Size().DrivingAxis() + 3;
|
---|
683 |
|
---|
684 |
|
---|
685 | float dirSplitBoxSize = 0.01f;
|
---|
686 | bool allowDirSplit = Magnitude(sBox.Size())*dirSplitBoxSize < Magnitude(bbox.Size());
|
---|
687 |
|
---|
688 |
|
---|
689 | for (axis = 0; axis < 5; axis++)
|
---|
690 | if (mInterleaveDirSplits ||
|
---|
691 | (axis < 3 && leaf->depth < mDirSplitDepth) ||
|
---|
692 | (axis >= 3 && leaf->depth >= mDirSplitDepth)
|
---|
693 | ) {
|
---|
694 | if (!mSplitUseOnlyDrivingAxis || axis == sAxis || axis == dAxis) {
|
---|
695 |
|
---|
696 |
|
---|
697 | if (splitType == ESplitRegular) {
|
---|
698 | if (axis < 3)
|
---|
699 | nPosition[axis] = (sBox.Min()[axis] + sBox.Max()[axis])*0.5f;
|
---|
700 | else
|
---|
701 | nPosition[axis] = (dBox.Min()[axis-3] + dBox.Max()[axis-3])*0.5f;
|
---|
702 |
|
---|
703 | nCostRatio[axis] = EvalCostRatio(leaf,
|
---|
704 | axis,
|
---|
705 | nPosition[axis],
|
---|
706 | nRaysBack[axis],
|
---|
707 | nRaysFront[axis],
|
---|
708 | nPvsBack[axis],
|
---|
709 | nPvsFront[axis]
|
---|
710 | );
|
---|
711 | } else
|
---|
712 | if (splitType == ESplitHeuristic) {
|
---|
713 | nCostRatio[axis] = EvalCostRatioHeuristic(
|
---|
714 | leaf,
|
---|
715 | axis,
|
---|
716 | nPosition[axis],
|
---|
717 | nRaysBack[axis],
|
---|
718 | nRaysFront[axis],
|
---|
719 | nPvsBack[axis],
|
---|
720 | nPvsFront[axis]);
|
---|
721 | } else
|
---|
722 | if (splitType == ESplitHybrid) {
|
---|
723 | if (leaf->depth > 7)
|
---|
724 | nCostRatio[axis] = EvalCostRatioHeuristic(
|
---|
725 | leaf,
|
---|
726 | axis,
|
---|
727 | nPosition[axis],
|
---|
728 | nRaysBack[axis],
|
---|
729 | nRaysFront[axis],
|
---|
730 | nPvsBack[axis],
|
---|
731 | nPvsFront[axis]);
|
---|
732 | else {
|
---|
733 | if (axis < 3)
|
---|
734 | nPosition[axis] = (sBox.Min()[axis] + sBox.Max()[axis])*0.5f;
|
---|
735 | else
|
---|
736 | nPosition[axis] = (dBox.Min()[axis-3] + dBox.Max()[axis-3])*0.5f;
|
---|
737 |
|
---|
738 | nCostRatio[axis] = EvalCostRatio(leaf,
|
---|
739 | axis,
|
---|
740 | nPosition[axis],
|
---|
741 | nRaysBack[axis],
|
---|
742 | nRaysFront[axis],
|
---|
743 | nPvsBack[axis],
|
---|
744 | nPvsFront[axis]
|
---|
745 | );
|
---|
746 | }
|
---|
747 | } else {
|
---|
748 | cerr<<"VssTree: Unknown split heuristics\n";
|
---|
749 | exit(1);
|
---|
750 | }
|
---|
751 |
|
---|
752 |
|
---|
753 | if ( bestAxis == -1)
|
---|
754 | bestAxis = axis;
|
---|
755 | else
|
---|
756 | if ( nCostRatio[axis] < nCostRatio[bestAxis] )
|
---|
757 | bestAxis = axis;
|
---|
758 | }
|
---|
759 | }
|
---|
760 |
|
---|
761 | axis = bestAxis;
|
---|
762 | position = nPosition[bestAxis];
|
---|
763 |
|
---|
764 | raysBack = nRaysBack[bestAxis];
|
---|
765 | raysFront = nRaysFront[bestAxis];
|
---|
766 |
|
---|
767 | pvsBack = nPvsBack[bestAxis];
|
---|
768 | pvsFront = nPvsFront[bestAxis];
|
---|
769 |
|
---|
770 | return nCostRatio[bestAxis];
|
---|
771 | }
|
---|
772 |
|
---|
773 |
|
---|
774 | float
|
---|
775 | VssTree::EvalCostRatioHeuristic(
|
---|
776 | VssTreeLeaf *leaf,
|
---|
777 | const int axis,
|
---|
778 | float &bestPosition,
|
---|
779 | int &raysBack,
|
---|
780 | int &raysFront,
|
---|
781 | int &pvsBack,
|
---|
782 | int &pvsFront
|
---|
783 | )
|
---|
784 | {
|
---|
785 | AxisAlignedBox3 box;
|
---|
786 | float minBox, maxBox;
|
---|
787 |
|
---|
788 | if (axis < 3) {
|
---|
789 | box = GetBBox(leaf);
|
---|
790 | minBox = box.Min(axis);
|
---|
791 | maxBox = box.Max(axis);
|
---|
792 | } else {
|
---|
793 | box = GetDirBBox(leaf);
|
---|
794 | minBox = box.Min(axis-3);
|
---|
795 | maxBox = box.Max(axis-3);
|
---|
796 | }
|
---|
797 |
|
---|
798 | SortSubdivisionCandidates(leaf, axis);
|
---|
799 |
|
---|
800 | // go through the lists, count the number of objects left and right
|
---|
801 | // and evaluate the following cost funcion:
|
---|
802 | // C = ct_div_ci + (ql*rl + qr*rr)/queries
|
---|
803 |
|
---|
804 | int rl=0, rr = (int)leaf->rays.size();
|
---|
805 | int pl=0, pr = (int)leaf->GetPvsSize();
|
---|
806 | float sizeBox = maxBox - minBox;
|
---|
807 |
|
---|
808 | float minBand = minBox + 0.1f*(maxBox - minBox);
|
---|
809 | float maxBand = minBox + 0.9f*(maxBox - minBox);
|
---|
810 |
|
---|
811 | float minRatio = 1e20f;
|
---|
812 |
|
---|
813 | Intersectable::NewMail();
|
---|
814 | // set all object as belonging to the fron pvs
|
---|
815 | for(VssTreeNode::RayInfoContainer::iterator ri = leaf->rays.begin();
|
---|
816 | ri != leaf->rays.end();
|
---|
817 | ri++)
|
---|
818 | if ((*ri).mRay->IsActive()) {
|
---|
819 | Intersectable *object = (*ri).mRay->mTerminationObject;
|
---|
820 | if (object)
|
---|
821 | if (!object->Mailed()) {
|
---|
822 | object->Mail();
|
---|
823 | object->mCounter = 1;
|
---|
824 | } else
|
---|
825 | object->mCounter++;
|
---|
826 | }
|
---|
827 |
|
---|
828 | Intersectable::NewMail();
|
---|
829 |
|
---|
830 | for(vector<SortableEntry>::const_iterator ci = splitCandidates->begin();
|
---|
831 | ci < splitCandidates->end();
|
---|
832 | ci++) {
|
---|
833 | VssRay *ray;
|
---|
834 | switch ((*ci).type) {
|
---|
835 | case SortableEntry::ERayMin: {
|
---|
836 | rl++;
|
---|
837 | ray = (VssRay *) (*ci).data;
|
---|
838 | Intersectable *object = ray->mTerminationObject;
|
---|
839 | if (object && !object->Mailed()) {
|
---|
840 | object->Mail();
|
---|
841 | pl++;
|
---|
842 | }
|
---|
843 | break;
|
---|
844 | }
|
---|
845 | case SortableEntry::ERayMax: {
|
---|
846 | rr--;
|
---|
847 | ray = (VssRay *) (*ci).data;
|
---|
848 | Intersectable *object = ray->mTerminationObject;
|
---|
849 | if (object) {
|
---|
850 | if (--object->mCounter == 0)
|
---|
851 | pr--;
|
---|
852 | }
|
---|
853 | break;
|
---|
854 | }
|
---|
855 | }
|
---|
856 |
|
---|
857 | float position = (*ci).value;
|
---|
858 |
|
---|
859 | if (position > minBand && position < maxBand) {
|
---|
860 |
|
---|
861 | float ratio = GetCostRatio(
|
---|
862 | leaf,
|
---|
863 | axis,
|
---|
864 | position,
|
---|
865 | rl,
|
---|
866 | rr,
|
---|
867 | pl,
|
---|
868 | pr);
|
---|
869 |
|
---|
870 |
|
---|
871 | // cout<<"pos="<<(*ci).value<<"\t q=("<<ql<<","<<qr<<")\t r=("<<rl<<","<<rr<<")"<<endl;
|
---|
872 | // cout<<"cost= "<<sum<<endl;
|
---|
873 |
|
---|
874 | if (ratio < minRatio) {
|
---|
875 | minRatio = ratio;
|
---|
876 | bestPosition = position;
|
---|
877 |
|
---|
878 | raysBack = rl;
|
---|
879 | raysFront = rr;
|
---|
880 |
|
---|
881 | pvsBack = pl;
|
---|
882 | pvsFront = pr;
|
---|
883 |
|
---|
884 | }
|
---|
885 | }
|
---|
886 | }
|
---|
887 |
|
---|
888 |
|
---|
889 | // cout<<"===================="<<endl;
|
---|
890 | // cout<<"costRatio="<<ratio<<" pos="<<position<<" t="<<(position - minBox)/(maxBox - minBox)
|
---|
891 | // <<"\t q=("<<queriesBack<<","<<queriesFront<<")\t r=("<<raysBack<<","<<raysFront<<")"<<endl;
|
---|
892 | return minRatio;
|
---|
893 | }
|
---|
894 |
|
---|
895 | void
|
---|
896 | VssTree::SortSubdivisionCandidates(
|
---|
897 | VssTreeLeaf *node,
|
---|
898 | const int axis
|
---|
899 | )
|
---|
900 | {
|
---|
901 |
|
---|
902 | splitCandidates->clear();
|
---|
903 |
|
---|
904 | int requestedSize = 2*((int)node->rays.size());
|
---|
905 | // creates a sorted split candidates array
|
---|
906 | if (splitCandidates->capacity() > 500000 &&
|
---|
907 | requestedSize < (int)(splitCandidates->capacity()/10) ) {
|
---|
908 |
|
---|
909 | delete splitCandidates;
|
---|
910 | splitCandidates = new vector<SortableEntry>;
|
---|
911 | }
|
---|
912 |
|
---|
913 | splitCandidates->reserve(requestedSize);
|
---|
914 |
|
---|
915 | // insert all queries
|
---|
916 | for(VssTreeNode::RayInfoContainer::const_iterator ri = node->rays.begin();
|
---|
917 | ri < node->rays.end();
|
---|
918 | ri++) {
|
---|
919 | if ((*ri).mRay->IsActive()) {
|
---|
920 | if (axis < 3) {
|
---|
921 | bool positive = (*ri).mRay->HasPosDir(axis);
|
---|
922 | splitCandidates->push_back(SortableEntry(positive ? SortableEntry::ERayMin :
|
---|
923 | SortableEntry::ERayMax,
|
---|
924 | (*ri).ExtrapOrigin(axis),
|
---|
925 | (void *)(*ri).mRay)
|
---|
926 | );
|
---|
927 |
|
---|
928 | splitCandidates->push_back(SortableEntry(positive ? SortableEntry::ERayMax :
|
---|
929 | SortableEntry::ERayMin,
|
---|
930 | (*ri).ExtrapTermination(axis),
|
---|
931 | (void *)(*ri).mRay)
|
---|
932 | );
|
---|
933 | } else {
|
---|
934 | float pos = (*ri).mRay->GetDirParametrization(axis-3);
|
---|
935 | splitCandidates->push_back(SortableEntry(SortableEntry::ERayMin,
|
---|
936 | pos - Limits::Small,
|
---|
937 | (void *)(*ri).mRay)
|
---|
938 | );
|
---|
939 |
|
---|
940 | splitCandidates->push_back(SortableEntry(SortableEntry::ERayMax,
|
---|
941 | pos + Limits::Small,
|
---|
942 | (void *)(*ri).mRay)
|
---|
943 | );
|
---|
944 | }
|
---|
945 | }
|
---|
946 | }
|
---|
947 |
|
---|
948 | stable_sort(splitCandidates->begin(), splitCandidates->end());
|
---|
949 | }
|
---|
950 |
|
---|
951 |
|
---|
952 | void
|
---|
953 | VssTree::EvaluateLeafStats(const TraversalData &data)
|
---|
954 | {
|
---|
955 |
|
---|
956 | // the node became a leaf -> evaluate stats for leafs
|
---|
957 | VssTreeLeaf *leaf = (VssTreeLeaf *)data.node;
|
---|
958 |
|
---|
959 | if (data.depth >= termMaxDepth)
|
---|
960 | stat.maxDepthNodes++;
|
---|
961 |
|
---|
962 | // if ( (int)(leaf->rays.size()) < termMinCost)
|
---|
963 | // stat.minCostNodes++;
|
---|
964 | if ( leaf->GetPvsSize() < termMinPvs)
|
---|
965 | stat.minPvsNodes++;
|
---|
966 |
|
---|
967 | if ( leaf->GetPvsSize() < termMinRays)
|
---|
968 | stat.minRaysNodes++;
|
---|
969 |
|
---|
970 | if (0 && leaf->GetAvgRayContribution() > termMaxRayContribution )
|
---|
971 | stat.maxRayContribNodes++;
|
---|
972 |
|
---|
973 | if (SqrMagnitude(data.bbox.Size()) <= termMinSize) {
|
---|
974 | stat.minSizeNodes++;
|
---|
975 | }
|
---|
976 |
|
---|
977 | if ( (int)(leaf->rays.size()) > stat.maxRayRefs)
|
---|
978 | stat.maxRayRefs = (int)leaf->rays.size();
|
---|
979 |
|
---|
980 | }
|
---|
981 |
|
---|
982 | bool
|
---|
983 | VssTree::TerminationCriteriaSatisfied(VssTreeLeaf *leaf)
|
---|
984 | {
|
---|
985 | return ( (leaf->GetPvsSize() < termMinPvs) ||
|
---|
986 | (leaf->rays.size() < termMinRays) ||
|
---|
987 | // (leaf->GetAvgRayContribution() > termMaxRayContribution ) ||
|
---|
988 | (leaf->depth >= termMaxDepth) ||
|
---|
989 | (SqrMagnitude(GetBBox(leaf).Size()) <= termMinSize)
|
---|
990 | // ||
|
---|
991 | // (mUseRss && leaf->mPassingRays == leaf->rays.size())
|
---|
992 | );
|
---|
993 | }
|
---|
994 |
|
---|
995 |
|
---|
996 | VssTreeNode *
|
---|
997 | VssTree::SubdivideNode(
|
---|
998 | VssTreeLeaf *leaf,
|
---|
999 | const AxisAlignedBox3 &box,
|
---|
1000 | AxisAlignedBox3 &backBBox,
|
---|
1001 | AxisAlignedBox3 &frontBBox
|
---|
1002 | )
|
---|
1003 | {
|
---|
1004 |
|
---|
1005 | if (TerminationCriteriaSatisfied(leaf)) {
|
---|
1006 | #if 0
|
---|
1007 | if (leaf->depth >= termMaxDepth) {
|
---|
1008 | cout<<"Warning: max depth reached depth="<<(int)leaf->depth<<" rays="<<leaf->rays.size()<<endl;
|
---|
1009 | cout<<"Bbox: "<<GetBBox(leaf)<<" dirbbox:"<<GetDirBBox(leaf)<<endl;
|
---|
1010 | }
|
---|
1011 | #endif
|
---|
1012 |
|
---|
1013 | return leaf;
|
---|
1014 | }
|
---|
1015 |
|
---|
1016 | float position;
|
---|
1017 |
|
---|
1018 | // first count ray sides
|
---|
1019 | int raysBack;
|
---|
1020 | int raysFront;
|
---|
1021 | int pvsBack;
|
---|
1022 | int pvsFront;
|
---|
1023 |
|
---|
1024 | // select subdivision axis
|
---|
1025 | int axis = SelectPlane( leaf, box, position, raysBack, raysFront, pvsBack, pvsFront);
|
---|
1026 | // cout<<axis<<" ";
|
---|
1027 |
|
---|
1028 | // cout<<"rays back="<<raysBack<<" rays front="<<raysFront<<" pvs back="<<pvsBack<<" pvs front="<<
|
---|
1029 | // pvsFront<<endl;
|
---|
1030 |
|
---|
1031 | if (axis == -1) {
|
---|
1032 | return leaf;
|
---|
1033 | }
|
---|
1034 |
|
---|
1035 | stat.nodes+=2;
|
---|
1036 | stat.splits[axis]++;
|
---|
1037 |
|
---|
1038 | // add the new nodes to the tree
|
---|
1039 | VssTreeInterior *node = new VssTreeInterior(leaf->parent);
|
---|
1040 |
|
---|
1041 | node->axis = axis;
|
---|
1042 | node->position = position;
|
---|
1043 | node->bbox = box;
|
---|
1044 | node->dirBBox = GetDirBBox(leaf);
|
---|
1045 |
|
---|
1046 | backBBox = box;
|
---|
1047 | frontBBox = box;
|
---|
1048 |
|
---|
1049 | VssTreeLeaf *back = new VssTreeLeaf(node, raysBack);
|
---|
1050 | VssTreeLeaf *front = new VssTreeLeaf(node, raysFront);
|
---|
1051 |
|
---|
1052 | // replace a link from node's parent
|
---|
1053 | if ( leaf->parent )
|
---|
1054 | leaf->parent->ReplaceChildLink(leaf, node);
|
---|
1055 | // and setup child links
|
---|
1056 | node->SetupChildLinks(back, front);
|
---|
1057 |
|
---|
1058 | if (axis <= VssTreeNode::SPLIT_Z) {
|
---|
1059 | backBBox.SetMax(axis, position);
|
---|
1060 | frontBBox.SetMin(axis, position);
|
---|
1061 |
|
---|
1062 | for(VssTreeNode::RayInfoContainer::iterator ri = leaf->rays.begin();
|
---|
1063 | ri != leaf->rays.end();
|
---|
1064 | ri++) {
|
---|
1065 | if ((*ri).mRay->IsActive()) {
|
---|
1066 |
|
---|
1067 | // first unref ray from the former leaf
|
---|
1068 | (*ri).mRay->Unref();
|
---|
1069 |
|
---|
1070 | // Debug << "computed t: " << (*ri).mRay->mT << endl;
|
---|
1071 | // determine the side of this ray with respect to the plane
|
---|
1072 | float t;
|
---|
1073 | int side = node->ComputeRayIntersection(*ri, t);
|
---|
1074 |
|
---|
1075 | if (side == 0) {
|
---|
1076 | if ((*ri).mRay->HasPosDir(axis)) {
|
---|
1077 | back->AddRay(VssTreeNode::RayInfo((*ri).mRay,
|
---|
1078 | (*ri).mMinT,
|
---|
1079 | t)
|
---|
1080 | );
|
---|
1081 | front->AddRay(VssTreeNode::RayInfo((*ri).mRay,
|
---|
1082 | t,
|
---|
1083 | (*ri).mMaxT));
|
---|
1084 | } else {
|
---|
1085 | back->AddRay(VssTreeNode::RayInfo((*ri).mRay,
|
---|
1086 | t,
|
---|
1087 | (*ri).mMaxT));
|
---|
1088 | front->AddRay(VssTreeNode::RayInfo((*ri).mRay,
|
---|
1089 | (*ri).mMinT,
|
---|
1090 | t));
|
---|
1091 | }
|
---|
1092 | } else
|
---|
1093 | if (side == 1)
|
---|
1094 | front->AddRay(*ri);
|
---|
1095 | else
|
---|
1096 | back->AddRay(*ri);
|
---|
1097 | } else
|
---|
1098 | (*ri).mRay->Unref();
|
---|
1099 | }
|
---|
1100 | } else {
|
---|
1101 | // rays front/back
|
---|
1102 |
|
---|
1103 |
|
---|
1104 | for(VssTreeNode::RayInfoContainer::iterator ri = leaf->rays.begin();
|
---|
1105 | ri != leaf->rays.end();
|
---|
1106 | ri++) {
|
---|
1107 | if ((*ri).mRay->IsActive()) {
|
---|
1108 | // first unref ray from the former leaf
|
---|
1109 | (*ri).mRay->Unref();
|
---|
1110 |
|
---|
1111 | int side;
|
---|
1112 | if ((*ri).mRay->GetDirParametrization(axis - 3) > position)
|
---|
1113 | side = 1;
|
---|
1114 | else
|
---|
1115 | side = -1;
|
---|
1116 |
|
---|
1117 | if (side == 1)
|
---|
1118 | front->AddRay(*ri);
|
---|
1119 | else
|
---|
1120 | back->AddRay(*ri);
|
---|
1121 |
|
---|
1122 | } else
|
---|
1123 | (*ri).mRay->Unref();
|
---|
1124 | }
|
---|
1125 | }
|
---|
1126 |
|
---|
1127 | front->SetPvsSize(pvsFront);
|
---|
1128 | back->SetPvsSize(pvsBack);
|
---|
1129 | // compute entropy as well
|
---|
1130 | front->ComputeEntropyImportance();
|
---|
1131 | back->ComputeEntropyImportance();
|
---|
1132 |
|
---|
1133 | // update stats
|
---|
1134 | stat.rayRefs -= (int)leaf->rays.size();
|
---|
1135 | stat.rayRefs += raysBack + raysFront;
|
---|
1136 |
|
---|
1137 |
|
---|
1138 | delete leaf;
|
---|
1139 | return node;
|
---|
1140 | }
|
---|
1141 |
|
---|
1142 |
|
---|
1143 |
|
---|
1144 |
|
---|
1145 |
|
---|
1146 |
|
---|
1147 | int
|
---|
1148 | VssTree::ReleaseMemory(const int time)
|
---|
1149 | {
|
---|
1150 | stack<VssTreeNode *> tstack;
|
---|
1151 |
|
---|
1152 | // find a node in the tree which subtree will be collapsed
|
---|
1153 | int maxAccessTime = time - accessTimeThreshold;
|
---|
1154 | int released;
|
---|
1155 |
|
---|
1156 | tstack.push(root);
|
---|
1157 |
|
---|
1158 | while (!tstack.empty()) {
|
---|
1159 | VssTreeNode *node = tstack.top();
|
---|
1160 | tstack.pop();
|
---|
1161 |
|
---|
1162 |
|
---|
1163 | if (!node->IsLeaf()) {
|
---|
1164 | VssTreeInterior *in = (VssTreeInterior *)node;
|
---|
1165 | // cout<<"depth="<<(int)in->depth<<" time="<<in->lastAccessTime<<endl;
|
---|
1166 | if (in->depth >= minCollapseDepth &&
|
---|
1167 | in->lastAccessTime <= maxAccessTime) {
|
---|
1168 | released = CollapseSubtree(node, time);
|
---|
1169 | break;
|
---|
1170 | }
|
---|
1171 |
|
---|
1172 | if (in->back->GetAccessTime() <
|
---|
1173 | in->front->GetAccessTime()) {
|
---|
1174 | tstack.push(in->front);
|
---|
1175 | tstack.push(in->back);
|
---|
1176 | } else {
|
---|
1177 | tstack.push(in->back);
|
---|
1178 | tstack.push(in->front);
|
---|
1179 | }
|
---|
1180 | }
|
---|
1181 | }
|
---|
1182 |
|
---|
1183 | while (tstack.empty()) {
|
---|
1184 | // could find node to collaps...
|
---|
1185 | // cout<<"Could not find a node to release "<<endl;
|
---|
1186 | break;
|
---|
1187 | }
|
---|
1188 |
|
---|
1189 | return released;
|
---|
1190 | }
|
---|
1191 |
|
---|
1192 |
|
---|
1193 |
|
---|
1194 |
|
---|
1195 | VssTreeNode *
|
---|
1196 | VssTree::SubdivideLeaf(
|
---|
1197 | VssTreeLeaf *leaf
|
---|
1198 | )
|
---|
1199 | {
|
---|
1200 | VssTreeNode *node = leaf;
|
---|
1201 |
|
---|
1202 | AxisAlignedBox3 leafBBox = GetBBox(leaf);
|
---|
1203 |
|
---|
1204 | static int pass = 0;
|
---|
1205 | pass ++;
|
---|
1206 |
|
---|
1207 | // check if we should perform a dynamic subdivision of the leaf
|
---|
1208 | if (!TerminationCriteriaSatisfied(leaf)) {
|
---|
1209 |
|
---|
1210 | // memory check and realese...
|
---|
1211 | if (GetMemUsage() > maxTotalMemory) {
|
---|
1212 | ReleaseMemory( pass );
|
---|
1213 | }
|
---|
1214 |
|
---|
1215 | AxisAlignedBox3 backBBox, frontBBox;
|
---|
1216 |
|
---|
1217 | // subdivide the node
|
---|
1218 | node =
|
---|
1219 | SubdivideNode(leaf,
|
---|
1220 | leafBBox,
|
---|
1221 | backBBox,
|
---|
1222 | frontBBox
|
---|
1223 | );
|
---|
1224 | }
|
---|
1225 |
|
---|
1226 | return node;
|
---|
1227 | }
|
---|
1228 |
|
---|
1229 |
|
---|
1230 |
|
---|
1231 | void
|
---|
1232 | VssTree::UpdateRays(VssRayContainer &remove,
|
---|
1233 | VssRayContainer &add
|
---|
1234 | )
|
---|
1235 | {
|
---|
1236 | VssTreeLeaf::NewMail();
|
---|
1237 |
|
---|
1238 | // schedule rays for removal
|
---|
1239 | for(VssRayContainer::const_iterator ri = remove.begin();
|
---|
1240 | ri != remove.end();
|
---|
1241 | ri++) {
|
---|
1242 | (*ri)->ScheduleForRemoval();
|
---|
1243 | }
|
---|
1244 |
|
---|
1245 | int inactive=0;
|
---|
1246 |
|
---|
1247 | for(VssRayContainer::const_iterator ri = remove.begin();
|
---|
1248 | ri != remove.end();
|
---|
1249 | ri++) {
|
---|
1250 | if ((*ri)->ScheduledForRemoval())
|
---|
1251 | // RemoveRay(*ri, NULL, false);
|
---|
1252 | // !!! BUG - with true it does not work correctly - aggreated delete
|
---|
1253 | RemoveRay(*ri, NULL, true);
|
---|
1254 | else
|
---|
1255 | inactive++;
|
---|
1256 | }
|
---|
1257 |
|
---|
1258 |
|
---|
1259 | // cout<<"all/inactive"<<remove.size()<<"/"<<inactive<<endl;
|
---|
1260 |
|
---|
1261 | for(VssRayContainer::const_iterator ri = add.begin();
|
---|
1262 | ri != add.end();
|
---|
1263 | ri++) {
|
---|
1264 | VssTreeNode::RayInfo info(*ri);
|
---|
1265 | if (ClipRay(info, bbox))
|
---|
1266 | AddRay(info);
|
---|
1267 | }
|
---|
1268 | }
|
---|
1269 |
|
---|
1270 |
|
---|
1271 | void
|
---|
1272 | VssTree::RemoveRay(VssRay *ray,
|
---|
1273 | vector<VssTreeLeaf *> *affectedLeaves,
|
---|
1274 | const bool removeAllScheduledRays
|
---|
1275 | )
|
---|
1276 | {
|
---|
1277 |
|
---|
1278 | stack<RayTraversalData> tstack;
|
---|
1279 |
|
---|
1280 | tstack.push(RayTraversalData(root, VssTreeNode::RayInfo(ray)));
|
---|
1281 |
|
---|
1282 | RayTraversalData data;
|
---|
1283 |
|
---|
1284 | // cout<<"Number of ray refs = "<<ray->RefCount()<<endl;
|
---|
1285 |
|
---|
1286 | while (!tstack.empty()) {
|
---|
1287 | data = tstack.top();
|
---|
1288 | tstack.pop();
|
---|
1289 |
|
---|
1290 | if (!data.node->IsLeaf()) {
|
---|
1291 | // split the set of rays in two groups intersecting the
|
---|
1292 | // two subtrees
|
---|
1293 |
|
---|
1294 | TraverseInternalNode(data, tstack);
|
---|
1295 |
|
---|
1296 | } else {
|
---|
1297 | // remove the ray from the leaf
|
---|
1298 | // find the ray in the leaf and swap it with the last ray...
|
---|
1299 | VssTreeLeaf *leaf = (VssTreeLeaf *)data.node;
|
---|
1300 |
|
---|
1301 | if (!leaf->Mailed()) {
|
---|
1302 | leaf->Mail();
|
---|
1303 | if (affectedLeaves)
|
---|
1304 | affectedLeaves->push_back(leaf);
|
---|
1305 |
|
---|
1306 | if (removeAllScheduledRays) {
|
---|
1307 | int tail = (int)leaf->rays.size()-1;
|
---|
1308 |
|
---|
1309 | for (int i=0; i < (int)(leaf->rays.size()); i++) {
|
---|
1310 | if (leaf->rays[i].mRay->ScheduledForRemoval()) {
|
---|
1311 | // find a ray to replace it with
|
---|
1312 | while (tail >= i && leaf->rays[tail].mRay->ScheduledForRemoval()) {
|
---|
1313 | stat.removedRayRefs++;
|
---|
1314 | leaf->rays[tail].mRay->Unref();
|
---|
1315 | leaf->rays.pop_back();
|
---|
1316 | tail--;
|
---|
1317 | }
|
---|
1318 |
|
---|
1319 | if (tail < i)
|
---|
1320 | break;
|
---|
1321 |
|
---|
1322 | stat.removedRayRefs++;
|
---|
1323 | leaf->rays[i].mRay->Unref();
|
---|
1324 | leaf->rays[i] = leaf->rays[tail];
|
---|
1325 | leaf->rays.pop_back();
|
---|
1326 | tail--;
|
---|
1327 | }
|
---|
1328 | }
|
---|
1329 | }
|
---|
1330 | }
|
---|
1331 |
|
---|
1332 | if (!removeAllScheduledRays)
|
---|
1333 | for (int i=0; i < (int)leaf->rays.size(); i++) {
|
---|
1334 | if (leaf->rays[i].mRay == ray) {
|
---|
1335 | stat.removedRayRefs++;
|
---|
1336 | ray->Unref();
|
---|
1337 | leaf->rays[i] = leaf->rays[leaf->rays.size()-1];
|
---|
1338 | leaf->rays.pop_back();
|
---|
1339 | // check this ray again
|
---|
1340 | break;
|
---|
1341 | }
|
---|
1342 | }
|
---|
1343 |
|
---|
1344 | }
|
---|
1345 | }
|
---|
1346 |
|
---|
1347 | if (ray->RefCount() != 0) {
|
---|
1348 | cerr<<"Error: Number of remaining refs = "<<ray->RefCount()<<endl;
|
---|
1349 | exit(1);
|
---|
1350 | }
|
---|
1351 |
|
---|
1352 | }
|
---|
1353 |
|
---|
1354 |
|
---|
1355 | void
|
---|
1356 | VssTree::AddRay(VssTreeNode::RayInfo &info)
|
---|
1357 | {
|
---|
1358 |
|
---|
1359 | stack<RayTraversalData> tstack;
|
---|
1360 |
|
---|
1361 | tstack.push(RayTraversalData(root, info));
|
---|
1362 |
|
---|
1363 | RayTraversalData data;
|
---|
1364 |
|
---|
1365 | while (!tstack.empty()) {
|
---|
1366 | data = tstack.top();
|
---|
1367 | tstack.pop();
|
---|
1368 |
|
---|
1369 | if (!data.node->IsLeaf()) {
|
---|
1370 | TraverseInternalNode(data, tstack);
|
---|
1371 | } else {
|
---|
1372 | // remove the ray from the leaf
|
---|
1373 | // find the ray in the leaf and swap it with the last ray...
|
---|
1374 | VssTreeLeaf *leaf = (VssTreeLeaf *)data.node;
|
---|
1375 | leaf->AddRay(data.rayData);
|
---|
1376 | stat.addedRayRefs++;
|
---|
1377 | }
|
---|
1378 | }
|
---|
1379 | }
|
---|
1380 |
|
---|
1381 | void
|
---|
1382 | VssTree::TraverseInternalNode(
|
---|
1383 | RayTraversalData &data,
|
---|
1384 | stack<RayTraversalData> &tstack)
|
---|
1385 | {
|
---|
1386 | VssTreeInterior *in = (VssTreeInterior *) data.node;
|
---|
1387 |
|
---|
1388 | if (in->axis <= VssTreeNode::SPLIT_Z) {
|
---|
1389 | float t;
|
---|
1390 | // determine the side of this ray with respect to the plane
|
---|
1391 | int side = in->ComputeRayIntersection(data.rayData,
|
---|
1392 | t);
|
---|
1393 |
|
---|
1394 |
|
---|
1395 | if (side == 0) {
|
---|
1396 | if (data.rayData.mRay->HasPosDir(in->axis)) {
|
---|
1397 | tstack.push(RayTraversalData(in->back,
|
---|
1398 | VssTreeNode::RayInfo(data.rayData.mRay,
|
---|
1399 | data.rayData.mMinT,
|
---|
1400 | t))
|
---|
1401 | );
|
---|
1402 |
|
---|
1403 | tstack.push(RayTraversalData(in->front,
|
---|
1404 | VssTreeNode::RayInfo(data.rayData.mRay,
|
---|
1405 | t,
|
---|
1406 | data.rayData.mMaxT
|
---|
1407 | ))
|
---|
1408 | );
|
---|
1409 |
|
---|
1410 | } else {
|
---|
1411 | tstack.push(RayTraversalData(in->back,
|
---|
1412 | VssTreeNode::RayInfo(data.rayData.mRay,
|
---|
1413 | t,
|
---|
1414 | data.rayData.mMaxT
|
---|
1415 | ))
|
---|
1416 | );
|
---|
1417 |
|
---|
1418 | tstack.push(RayTraversalData(in->front,
|
---|
1419 | VssTreeNode::RayInfo(data.rayData.mRay,
|
---|
1420 | data.rayData.mMinT,
|
---|
1421 | t))
|
---|
1422 | );
|
---|
1423 |
|
---|
1424 |
|
---|
1425 | }
|
---|
1426 | } else
|
---|
1427 | if (side == 1)
|
---|
1428 | tstack.push(RayTraversalData(in->front, data.rayData));
|
---|
1429 | else
|
---|
1430 | tstack.push(RayTraversalData(in->back, data.rayData));
|
---|
1431 | }
|
---|
1432 | else {
|
---|
1433 | // directional split
|
---|
1434 | if (data.rayData.mRay->GetDirParametrization(in->axis - 3) > in->position)
|
---|
1435 | tstack.push(RayTraversalData(in->front, data.rayData));
|
---|
1436 | else
|
---|
1437 | tstack.push(RayTraversalData(in->back, data.rayData));
|
---|
1438 | }
|
---|
1439 | }
|
---|
1440 |
|
---|
1441 |
|
---|
1442 | int
|
---|
1443 | VssTree::CollapseSubtree(VssTreeNode *sroot, const int time)
|
---|
1444 | {
|
---|
1445 | // first count all rays in the subtree
|
---|
1446 | // use mail 1 for this purpose
|
---|
1447 | stack<VssTreeNode *> tstack;
|
---|
1448 | int rayCount = 0;
|
---|
1449 | int totalRayCount = 0;
|
---|
1450 | int collapsedNodes = 0;
|
---|
1451 |
|
---|
1452 | #if DEBUG_COLLAPSE
|
---|
1453 | cout<<"Collapsing subtree"<<endl;
|
---|
1454 | cout<<"acessTime="<<sroot->GetAccessTime()<<endl;
|
---|
1455 | cout<<"depth="<<(int)sroot->depth<<endl;
|
---|
1456 | #endif
|
---|
1457 |
|
---|
1458 | // tstat.collapsedSubtrees++;
|
---|
1459 | // tstat.collapseDepths += (int)sroot->depth;
|
---|
1460 | // tstat.collapseAccessTimes += time - sroot->GetAccessTime();
|
---|
1461 |
|
---|
1462 | tstack.push(sroot);
|
---|
1463 | VssRay::NewMail();
|
---|
1464 |
|
---|
1465 | while (!tstack.empty()) {
|
---|
1466 | collapsedNodes++;
|
---|
1467 | VssTreeNode *node = tstack.top();
|
---|
1468 | tstack.pop();
|
---|
1469 |
|
---|
1470 | if (node->IsLeaf()) {
|
---|
1471 | VssTreeLeaf *leaf = (VssTreeLeaf *) node;
|
---|
1472 | for(VssTreeNode::RayInfoContainer::iterator ri = leaf->rays.begin();
|
---|
1473 | ri != leaf->rays.end();
|
---|
1474 | ri++) {
|
---|
1475 |
|
---|
1476 | totalRayCount++;
|
---|
1477 | if ((*ri).mRay->IsActive() && !(*ri).mRay->Mailed()) {
|
---|
1478 | (*ri).mRay->Mail();
|
---|
1479 | rayCount++;
|
---|
1480 | }
|
---|
1481 | }
|
---|
1482 | } else {
|
---|
1483 | tstack.push(((VssTreeInterior *)node)->back);
|
---|
1484 | tstack.push(((VssTreeInterior *)node)->front);
|
---|
1485 | }
|
---|
1486 | }
|
---|
1487 |
|
---|
1488 | VssRay::NewMail();
|
---|
1489 |
|
---|
1490 | // create a new node that will hold the rays
|
---|
1491 | VssTreeLeaf *newLeaf = new VssTreeLeaf( sroot->parent, rayCount );
|
---|
1492 | if ( newLeaf->parent )
|
---|
1493 | newLeaf->parent->ReplaceChildLink(sroot, newLeaf);
|
---|
1494 |
|
---|
1495 |
|
---|
1496 | tstack.push( sroot );
|
---|
1497 |
|
---|
1498 | while (!tstack.empty()) {
|
---|
1499 |
|
---|
1500 | VssTreeNode *node = tstack.top();
|
---|
1501 | tstack.pop();
|
---|
1502 |
|
---|
1503 | if (node->IsLeaf()) {
|
---|
1504 | VssTreeLeaf *leaf = (VssTreeLeaf *) node;
|
---|
1505 |
|
---|
1506 | for(VssTreeNode::RayInfoContainer::iterator ri = leaf->rays.begin();
|
---|
1507 | ri != leaf->rays.end();
|
---|
1508 | ri++) {
|
---|
1509 |
|
---|
1510 | // unref this ray from the old node
|
---|
1511 |
|
---|
1512 | if ((*ri).mRay->IsActive()) {
|
---|
1513 | (*ri).mRay->Unref();
|
---|
1514 | if (!(*ri).mRay->Mailed()) {
|
---|
1515 | (*ri).mRay->Mail();
|
---|
1516 | newLeaf->AddRay(*ri);
|
---|
1517 | }
|
---|
1518 | } else
|
---|
1519 | (*ri).mRay->Unref();
|
---|
1520 |
|
---|
1521 | }
|
---|
1522 | } else {
|
---|
1523 | tstack.push(((VssTreeInterior *)node)->back);
|
---|
1524 | tstack.push(((VssTreeInterior *)node)->front);
|
---|
1525 | }
|
---|
1526 | }
|
---|
1527 |
|
---|
1528 | // delete the node and all its children
|
---|
1529 | delete sroot;
|
---|
1530 |
|
---|
1531 | // for(VssTreeNode::SRayContainer::iterator ri = newLeaf->rays.begin();
|
---|
1532 | // ri != newLeaf->rays.end();
|
---|
1533 | // ri++)
|
---|
1534 | // (*ri).ray->UnMail(2);
|
---|
1535 |
|
---|
1536 |
|
---|
1537 | #if DEBUG_COLLAPSE
|
---|
1538 | cout<<"Total memory before="<<GetMemUsage()<<endl;
|
---|
1539 | #endif
|
---|
1540 |
|
---|
1541 | stat.nodes -= collapsedNodes - 1;
|
---|
1542 | stat.rayRefs -= totalRayCount - rayCount;
|
---|
1543 |
|
---|
1544 | #if DEBUG_COLLAPSE
|
---|
1545 | cout<<"collapsed nodes"<<collapsedNodes<<endl;
|
---|
1546 | cout<<"collapsed rays"<<totalRayCount - rayCount<<endl;
|
---|
1547 | cout<<"Total memory after="<<GetMemUsage()<<endl;
|
---|
1548 | cout<<"================================"<<endl;
|
---|
1549 | #endif
|
---|
1550 |
|
---|
1551 | // tstat.collapsedNodes += collapsedNodes;
|
---|
1552 | // tstat.collapsedRays += totalRayCount - rayCount;
|
---|
1553 |
|
---|
1554 | return totalRayCount - rayCount;
|
---|
1555 | }
|
---|
1556 |
|
---|
1557 |
|
---|
1558 | int
|
---|
1559 | VssTree::GetPvsSize(const AxisAlignedBox3 &box) const
|
---|
1560 | {
|
---|
1561 | stack<VssTreeNode *> tstack;
|
---|
1562 | tstack.push(root);
|
---|
1563 |
|
---|
1564 | Intersectable::NewMail();
|
---|
1565 | int pvsSize = 0;
|
---|
1566 |
|
---|
1567 | while (!tstack.empty()) {
|
---|
1568 | VssTreeNode *node = tstack.top();
|
---|
1569 | tstack.pop();
|
---|
1570 |
|
---|
1571 |
|
---|
1572 | if (node->IsLeaf()) {
|
---|
1573 | VssTreeLeaf *leaf = (VssTreeLeaf *)node;
|
---|
1574 | for(VssTreeNode::RayInfoContainer::iterator ri = leaf->rays.begin();
|
---|
1575 | ri != leaf->rays.end();
|
---|
1576 | ri++)
|
---|
1577 | if ((*ri).mRay->IsActive()) {
|
---|
1578 | Intersectable *object;
|
---|
1579 | #if BIDIRECTIONAL_RAY
|
---|
1580 | object = (*ri).mRay->mOriginObject;
|
---|
1581 | if (object && !object->Mailed()) {
|
---|
1582 | pvsSize++;
|
---|
1583 | object->Mail();
|
---|
1584 | }
|
---|
1585 | #endif
|
---|
1586 | object = (*ri).mRay->mTerminationObject;
|
---|
1587 | if (object && !object->Mailed()) {
|
---|
1588 | pvsSize++;
|
---|
1589 | object->Mail();
|
---|
1590 | }
|
---|
1591 | }
|
---|
1592 | } else {
|
---|
1593 | VssTreeInterior *in = (VssTreeInterior *)node;
|
---|
1594 | if (in->axis < 3) {
|
---|
1595 | if (box.Max(in->axis) >= in->position )
|
---|
1596 | tstack.push(in->front);
|
---|
1597 |
|
---|
1598 | if (box.Min(in->axis) <= in->position )
|
---|
1599 | tstack.push(in->back);
|
---|
1600 | } else {
|
---|
1601 | // both nodes for directional splits
|
---|
1602 | tstack.push(in->front);
|
---|
1603 | tstack.push(in->back);
|
---|
1604 | }
|
---|
1605 | }
|
---|
1606 | }
|
---|
1607 | return pvsSize;
|
---|
1608 | }
|
---|
1609 |
|
---|
1610 | void
|
---|
1611 | VssTree::GetRayContributionStatistics(
|
---|
1612 | float &minRayContribution,
|
---|
1613 | float &maxRayContribution,
|
---|
1614 | float &avgRayContribution
|
---|
1615 | )
|
---|
1616 | {
|
---|
1617 | stack<VssTreeNode *> tstack;
|
---|
1618 | tstack.push(root);
|
---|
1619 |
|
---|
1620 | minRayContribution = 1.0f;
|
---|
1621 | maxRayContribution = 0.0f;
|
---|
1622 | float sumRayContribution = 0.0f;
|
---|
1623 | int leaves = 0;
|
---|
1624 |
|
---|
1625 | while (!tstack.empty()) {
|
---|
1626 | VssTreeNode *node = tstack.top();
|
---|
1627 | tstack.pop();
|
---|
1628 |
|
---|
1629 | if (node->IsLeaf()) {
|
---|
1630 | leaves++;
|
---|
1631 | VssTreeLeaf *leaf = (VssTreeLeaf *)node;
|
---|
1632 | float c = leaf->GetImportance();
|
---|
1633 | if (c > maxRayContribution)
|
---|
1634 | maxRayContribution = c;
|
---|
1635 | if (c < minRayContribution)
|
---|
1636 | minRayContribution = c;
|
---|
1637 | sumRayContribution += c;
|
---|
1638 |
|
---|
1639 | } else {
|
---|
1640 | VssTreeInterior *in = (VssTreeInterior *)node;
|
---|
1641 | // both nodes for directional splits
|
---|
1642 | tstack.push(in->front);
|
---|
1643 | tstack.push(in->back);
|
---|
1644 | }
|
---|
1645 | }
|
---|
1646 |
|
---|
1647 | cout<<"sum="<<sumRayContribution<<endl;
|
---|
1648 | cout<<"leaves="<<leaves<<endl;
|
---|
1649 | avgRayContribution = sumRayContribution/(float)leaves;
|
---|
1650 | }
|
---|
1651 |
|
---|
1652 |
|
---|
1653 | int
|
---|
1654 | VssTree::GenerateRays(const float ratioPerLeaf,
|
---|
1655 | SimpleRayContainer &rays)
|
---|
1656 | {
|
---|
1657 | stack<VssTreeNode *> tstack;
|
---|
1658 | tstack.push(root);
|
---|
1659 |
|
---|
1660 | while (!tstack.empty()) {
|
---|
1661 | VssTreeNode *node = tstack.top();
|
---|
1662 | tstack.pop();
|
---|
1663 |
|
---|
1664 | if (node->IsLeaf()) {
|
---|
1665 | VssTreeLeaf *leaf = (VssTreeLeaf *)node;
|
---|
1666 | float c = leaf->GetImportance();
|
---|
1667 | int num = int(c*ratioPerLeaf + 0.5f);
|
---|
1668 | // cout<<num<<" ";
|
---|
1669 |
|
---|
1670 | for (int i=0; i < num; i++) {
|
---|
1671 | Vector3 origin = GetBBox(leaf).GetRandomPoint();
|
---|
1672 | Vector3 dirVector = GetDirBBox(leaf).GetRandomPoint();
|
---|
1673 | Vector3 direction = VssRay::GetDirection(dirVector.x, dirVector.y);
|
---|
1674 | //cout<<"dir vector.x="<<dirVector.x<<"direction'.x="<<atan2(direction.x, direction.y)<<endl;
|
---|
1675 | rays.push_back(SimpleRay(origin, direction, SamplingStrategy::VSS_BASED_DISTRIBUTION, 1.0f));
|
---|
1676 | }
|
---|
1677 |
|
---|
1678 | } else {
|
---|
1679 | VssTreeInterior *in = (VssTreeInterior *)node;
|
---|
1680 | // both nodes for directional splits
|
---|
1681 | tstack.push(in->front);
|
---|
1682 | tstack.push(in->back);
|
---|
1683 | }
|
---|
1684 | }
|
---|
1685 |
|
---|
1686 | return (int)rays.size();
|
---|
1687 | }
|
---|
1688 |
|
---|
1689 | void
|
---|
1690 | VssTree::CollectLeaves(vector<VssTreeLeaf *> &leaves)
|
---|
1691 | {
|
---|
1692 | stack<VssTreeNode *> tstack;
|
---|
1693 | tstack.push(root);
|
---|
1694 |
|
---|
1695 | while (!tstack.empty()) {
|
---|
1696 | VssTreeNode *node = tstack.top();
|
---|
1697 | tstack.pop();
|
---|
1698 |
|
---|
1699 | if (node->IsLeaf()) {
|
---|
1700 | VssTreeLeaf *leaf = (VssTreeLeaf *)node;
|
---|
1701 | leaves.push_back(leaf);
|
---|
1702 | } else {
|
---|
1703 | VssTreeInterior *in = (VssTreeInterior *)node;
|
---|
1704 | // both nodes for directional splits
|
---|
1705 | tstack.push(in->front);
|
---|
1706 | tstack.push(in->back);
|
---|
1707 | }
|
---|
1708 | }
|
---|
1709 | }
|
---|
1710 |
|
---|
1711 | bool
|
---|
1712 | VssTree::ValidLeaf(VssTreeLeaf *leaf) const
|
---|
1713 | {
|
---|
1714 | return leaf->rays.size() > termMinRays/4;
|
---|
1715 | }
|
---|
1716 |
|
---|
1717 |
|
---|
1718 | void
|
---|
1719 | VssTree::GenerateLeafRays(VssTreeLeaf *leaf,
|
---|
1720 | const int numberOfRays,
|
---|
1721 | SimpleRayContainer &rays)
|
---|
1722 | {
|
---|
1723 | int nrays = (int)leaf->rays.size();
|
---|
1724 | for (int i = 0; i < numberOfRays; ++ i) {
|
---|
1725 | // pickup 3 random rays
|
---|
1726 | int r1 = (int)RandomValue(0, (float)(nrays-1));
|
---|
1727 | int r2 = (int)RandomValue(0, (float)(nrays-1));
|
---|
1728 | int r3 = (int)RandomValue(0, (float)(nrays-1));
|
---|
1729 |
|
---|
1730 | Vector3 o1 = leaf->rays[r1].Extrap(RandomValue(leaf->rays[r1].GetMinT(),
|
---|
1731 | leaf->rays[r1].GetMaxT()));
|
---|
1732 |
|
---|
1733 | Vector3 o2 = leaf->rays[r2].Extrap(RandomValue(leaf->rays[r2].GetMinT(),
|
---|
1734 | leaf->rays[r2].GetMaxT()));
|
---|
1735 |
|
---|
1736 | Vector3 o3 = leaf->rays[r3].Extrap(RandomValue(leaf->rays[r3].GetMinT(),
|
---|
1737 | leaf->rays[r3].GetMaxT()));
|
---|
1738 |
|
---|
1739 | const float overlap = 0.1f;
|
---|
1740 |
|
---|
1741 | Vector3 origin, direction;
|
---|
1742 | bool useExtendedConvexCombination = true;
|
---|
1743 | if (useExtendedConvexCombination) {
|
---|
1744 | float w1, w2, w3;
|
---|
1745 | GenerateExtendedConvexCombinationWeights(w1, w2, w3, overlap);
|
---|
1746 | origin = w1*o1 + w2*o2 + w3*o3;
|
---|
1747 | direction =
|
---|
1748 | w1*leaf->rays[r1].mRay->GetDir() +
|
---|
1749 | w2*leaf->rays[r2].mRay->GetDir() +
|
---|
1750 | w3*leaf->rays[r3].mRay->GetDir();
|
---|
1751 | } else {
|
---|
1752 | origin = GetBBox(leaf).GetRandomPoint();
|
---|
1753 | Vector3 dirVector = GetDirBBox(leaf).GetRandomPoint();
|
---|
1754 | direction = VssRay::GetInvDirParam(dirVector.x,dirVector.y);
|
---|
1755 | }
|
---|
1756 | //cout<<"dir vector.x="<<dirVector.x<<"direction'.x="<<atan2(direction.x, direction.y)<<endl;
|
---|
1757 | rays.push_back(SimpleRay(origin, direction, SamplingStrategy::VSS_BASED_DISTRIBUTION, 1.0f));
|
---|
1758 | }
|
---|
1759 | }
|
---|
1760 |
|
---|
1761 | int
|
---|
1762 | VssTree::GenerateRays(const int numberOfRays,
|
---|
1763 | const int numberOfLeaves,
|
---|
1764 | SimpleRayContainer &rays)
|
---|
1765 | {
|
---|
1766 |
|
---|
1767 | vector<VssTreeLeaf *> leaves;
|
---|
1768 |
|
---|
1769 | CollectLeaves(leaves);
|
---|
1770 |
|
---|
1771 | sort(leaves.begin(),
|
---|
1772 | leaves.end(),
|
---|
1773 | GreaterContribution);
|
---|
1774 |
|
---|
1775 |
|
---|
1776 | float sumContrib = 0.0;
|
---|
1777 | int i;
|
---|
1778 | int k = 0;
|
---|
1779 | for (i=0; i < leaves.size() && k < numberOfLeaves; i++)
|
---|
1780 | if (ValidLeaf(leaves[i])) {
|
---|
1781 | float c = leaves[i]->GetImportance();
|
---|
1782 | sumContrib += c;
|
---|
1783 | // cout<<"ray contrib "<<i<<" : "<<c<<endl;
|
---|
1784 | k++;
|
---|
1785 | }
|
---|
1786 |
|
---|
1787 | float avgContrib = sumContrib/numberOfLeaves;
|
---|
1788 | float ratioPerLeaf = numberOfRays/(avgContrib*numberOfLeaves);
|
---|
1789 | k = 0;
|
---|
1790 | for (i=0; i < leaves.size() && k < numberOfLeaves; i++)
|
---|
1791 | if (ValidLeaf(leaves[i])) {
|
---|
1792 | k++;
|
---|
1793 | VssTreeLeaf *leaf = leaves[i];
|
---|
1794 | float c = leaf->GetImportance();
|
---|
1795 | int num = (int)(c*ratioPerLeaf + 0.5f);
|
---|
1796 | GenerateLeafRays(leaf, num, rays);
|
---|
1797 | }
|
---|
1798 |
|
---|
1799 | return (int)rays.size();
|
---|
1800 | }
|
---|
1801 |
|
---|
1802 |
|
---|
1803 | float
|
---|
1804 | VssTree::GetAvgPvsSize()
|
---|
1805 | {
|
---|
1806 | stack<VssTreeNode *> tstack;
|
---|
1807 | tstack.push(root);
|
---|
1808 |
|
---|
1809 | int sumPvs = 0;
|
---|
1810 | int leaves = 0;
|
---|
1811 | while (!tstack.empty()) {
|
---|
1812 | VssTreeNode *node = tstack.top();
|
---|
1813 | tstack.pop();
|
---|
1814 |
|
---|
1815 | if (node->IsLeaf()) {
|
---|
1816 | VssTreeLeaf *leaf = (VssTreeLeaf *)node;
|
---|
1817 | // update pvs size
|
---|
1818 | leaf->UpdatePvsSize();
|
---|
1819 | sumPvs += leaf->GetPvsSize();
|
---|
1820 | leaves++;
|
---|
1821 | } else {
|
---|
1822 | VssTreeInterior *in = (VssTreeInterior *)node;
|
---|
1823 | // both nodes for directional splits
|
---|
1824 | tstack.push(in->front);
|
---|
1825 | tstack.push(in->back);
|
---|
1826 | }
|
---|
1827 | }
|
---|
1828 |
|
---|
1829 |
|
---|
1830 | return sumPvs/(float)leaves;
|
---|
1831 | }
|
---|
1832 |
|
---|
1833 |
|
---|
1834 | float
|
---|
1835 | VssTreeLeaf::GetImportance() const
|
---|
1836 | {
|
---|
1837 |
|
---|
1838 | if (1) {
|
---|
1839 | // return GetAvgRayContribution();
|
---|
1840 | return (float)GetPvsSize();
|
---|
1841 | } else {
|
---|
1842 | // return GetAvgRayContribution()*mEntropyImportance;
|
---|
1843 | //return GetAvgRayContribution();
|
---|
1844 | return mEntropyImportance;
|
---|
1845 | }
|
---|
1846 | }
|
---|
1847 |
|
---|
1848 |
|
---|
1849 | float
|
---|
1850 | VssTreeLeaf::ComputePvsEntropy()
|
---|
1851 | {
|
---|
1852 | int samples = 0;
|
---|
1853 | Intersectable::NewMail();
|
---|
1854 | // set all object as belonging to the fron pvs
|
---|
1855 | for(VssTreeNode::RayInfoContainer::iterator ri = rays.begin();
|
---|
1856 | ri != rays.end();
|
---|
1857 | ri++)
|
---|
1858 | if ((*ri).mRay->IsActive()) {
|
---|
1859 | Intersectable *object = (*ri).mRay->mTerminationObject;
|
---|
1860 | if (object) {
|
---|
1861 | if (!object->Mailed()) {
|
---|
1862 | object->Mail();
|
---|
1863 | object->mCounter = 1;
|
---|
1864 | } else
|
---|
1865 | object->mCounter++;
|
---|
1866 | samples++;
|
---|
1867 | }
|
---|
1868 | }
|
---|
1869 |
|
---|
1870 | float entropy = 0.0f;
|
---|
1871 |
|
---|
1872 | if (samples > 1) {
|
---|
1873 | Intersectable::NewMail();
|
---|
1874 | for(RayInfoContainer::const_iterator ri = rays.begin();
|
---|
1875 | ri != rays.end();
|
---|
1876 | ri++)
|
---|
1877 | if ((*ri).mRay->IsActive()) {
|
---|
1878 | Intersectable *object = (*ri).mRay->mTerminationObject;
|
---|
1879 | if (object) {
|
---|
1880 | if (!object->Mailed()) {
|
---|
1881 | object->Mail();
|
---|
1882 | float p = object->mCounter/(float)samples;
|
---|
1883 | entropy -= p*log(p);
|
---|
1884 | }
|
---|
1885 | }
|
---|
1886 | }
|
---|
1887 | entropy = entropy/log((float)samples);
|
---|
1888 | }
|
---|
1889 | else
|
---|
1890 | entropy = 1.0f;
|
---|
1891 |
|
---|
1892 | return entropy;
|
---|
1893 | }
|
---|
1894 |
|
---|
1895 | float
|
---|
1896 | VssTreeLeaf::ComputeRayLengthEntropy()
|
---|
1897 | {
|
---|
1898 | // get sum of all ray lengths
|
---|
1899 | // consider only passing rays or originating rays
|
---|
1900 | float sum = 0.0f;
|
---|
1901 | int samples = 0;
|
---|
1902 |
|
---|
1903 | for(RayInfoContainer::const_iterator ri = rays.begin();
|
---|
1904 | ri != rays.end();
|
---|
1905 | ri++) {
|
---|
1906 | int rayClass = (*ri).GetRayClass();
|
---|
1907 | if (
|
---|
1908 | rayClass == RayInfo::PASSING_RAY
|
---|
1909 | // ||
|
---|
1910 | // rayClass == RayInfo::SOURCE_RAY
|
---|
1911 | // rayClass == RayInfo::TERMINATION_RAY
|
---|
1912 | ) {
|
---|
1913 | float c = 1.0f - (*ri).GetMaxT();
|
---|
1914 | sum += (*ri).mRay->GetSize()*c;
|
---|
1915 | samples++;
|
---|
1916 | }
|
---|
1917 | }
|
---|
1918 |
|
---|
1919 | float entropy = 0.0f;
|
---|
1920 |
|
---|
1921 | if (samples > 1) {
|
---|
1922 | for(RayInfoContainer::const_iterator ri = rays.begin();
|
---|
1923 | ri != rays.end();
|
---|
1924 | ri++) {
|
---|
1925 | int rayClass = (*ri).GetRayClass();
|
---|
1926 | if (
|
---|
1927 | rayClass == RayInfo::PASSING_RAY
|
---|
1928 | // ||
|
---|
1929 | // rayClass == RayInfo::SOURCE_RAY
|
---|
1930 | // rayClass == RayInfo::TERMINATION_RAY
|
---|
1931 | ) {
|
---|
1932 | float c = 1.0f - (*ri).GetMaxT();
|
---|
1933 | float p = (*ri).mRay->GetSize()*c/sum;
|
---|
1934 | entropy -= p*log(p);
|
---|
1935 | }
|
---|
1936 | }
|
---|
1937 | entropy = entropy/log((float)samples);
|
---|
1938 | } else
|
---|
1939 | entropy = 1.0f;
|
---|
1940 |
|
---|
1941 | return entropy;
|
---|
1942 | }
|
---|
1943 |
|
---|
1944 | float
|
---|
1945 | VssTreeLeaf::ComputeRayTerminationEntropy()
|
---|
1946 | {
|
---|
1947 |
|
---|
1948 | return 0.0f;
|
---|
1949 | }
|
---|
1950 |
|
---|
1951 |
|
---|
1952 | void
|
---|
1953 | VssTreeLeaf::ComputeEntropyImportance()
|
---|
1954 | {
|
---|
1955 | // mEntropy = 1.0f - ComputeRayLengthEntropy();
|
---|
1956 | mEntropyImportance = 1.0f - ComputePvsEntropy();
|
---|
1957 |
|
---|
1958 | // cout<<"ei="<<mEntropyImportance<<" ";
|
---|
1959 | }
|
---|
1960 |
|
---|
1961 |
|
---|
1962 | int
|
---|
1963 | VssTree::CollectRays(VssRayContainer &rays,
|
---|
1964 | const int number)
|
---|
1965 | {
|
---|
1966 | VssRayContainer allRays;
|
---|
1967 | CollectRays(allRays);
|
---|
1968 |
|
---|
1969 | int desired = min(number, (int)allRays.size());
|
---|
1970 | float prob = desired/(float)allRays.size();
|
---|
1971 | while (rays.size() < desired) {
|
---|
1972 | VssRayContainer::const_iterator it = allRays.begin();
|
---|
1973 | for (; it != allRays.end() && rays.size() < desired; it++) {
|
---|
1974 | if (Random(1.0f) < prob)
|
---|
1975 | rays.push_back(*it);
|
---|
1976 | }
|
---|
1977 | }
|
---|
1978 | return (int)rays.size();
|
---|
1979 | }
|
---|
1980 |
|
---|
1981 |
|
---|
1982 | int
|
---|
1983 | VssTree::CollectRays(VssRayContainer &rays
|
---|
1984 | )
|
---|
1985 | {
|
---|
1986 | VssRay::NewMail();
|
---|
1987 |
|
---|
1988 | stack<VssTreeNode *> tstack;
|
---|
1989 | tstack.push(root);
|
---|
1990 |
|
---|
1991 | while (!tstack.empty()) {
|
---|
1992 | VssTreeNode *node = tstack.top();
|
---|
1993 | tstack.pop();
|
---|
1994 |
|
---|
1995 | if (node->IsLeaf()) {
|
---|
1996 | VssTreeLeaf *leaf = (VssTreeLeaf *)node;
|
---|
1997 | // update pvs size
|
---|
1998 | VssTreeNode::RayInfoContainer::const_iterator it = leaf->rays.begin();
|
---|
1999 | for (;it != leaf->rays.end(); ++it)
|
---|
2000 | if (!(*it).mRay->Mailed()) {
|
---|
2001 | (*it).mRay->Mail();
|
---|
2002 | rays.push_back((*it).mRay);
|
---|
2003 | }
|
---|
2004 | } else {
|
---|
2005 | VssTreeInterior *in = (VssTreeInterior *)node;
|
---|
2006 | // both nodes for directional splits
|
---|
2007 | tstack.push(in->front);
|
---|
2008 | tstack.push(in->back);
|
---|
2009 | }
|
---|
2010 | }
|
---|
2011 |
|
---|
2012 | return (int)rays.size();
|
---|
2013 | }
|
---|
2014 |
|
---|
2015 | }
|
---|