1 | #include <stack>
|
---|
2 | #include <time.h>
|
---|
3 | #include <iomanip>
|
---|
4 |
|
---|
5 | #include "ViewCell.h"
|
---|
6 | #include "Plane3.h"
|
---|
7 | #include "VspTree.h"
|
---|
8 | #include "Mesh.h"
|
---|
9 | #include "common.h"
|
---|
10 | #include "Environment.h"
|
---|
11 | #include "Polygon3.h"
|
---|
12 | #include "Ray.h"
|
---|
13 | #include "AxisAlignedBox3.h"
|
---|
14 | #include "Exporter.h"
|
---|
15 | #include "Plane3.h"
|
---|
16 | #include "ViewCellsManager.h"
|
---|
17 | #include "Beam.h"
|
---|
18 | #include "KdTree.h"
|
---|
19 | #include "KdIntersectable.h"
|
---|
20 | #include "HierarchyManager.h"
|
---|
21 | #include "BvHierarchy.h"
|
---|
22 | #include "OspTree.h"
|
---|
23 |
|
---|
24 |
|
---|
25 | namespace GtpVisibilityPreprocessor {
|
---|
26 |
|
---|
27 |
|
---|
28 | #define USE_FIXEDPOINT_T 0
|
---|
29 |
|
---|
30 |
|
---|
31 | //-- static members
|
---|
32 |
|
---|
33 | VspTree *VspTree::VspSubdivisionCandidate::sVspTree = NULL;
|
---|
34 |
|
---|
35 |
|
---|
36 | // variable for debugging volume contribution for heuristics
|
---|
37 | static float debugVol;
|
---|
38 |
|
---|
39 | int VspNode::sMailId = 1;
|
---|
40 |
|
---|
41 | // pvs penalty can be different from pvs size
|
---|
42 | inline static float EvalPvsPenalty(const int pvs,
|
---|
43 | const int lower,
|
---|
44 | const int upper)
|
---|
45 | {
|
---|
46 | // clamp to minmax values
|
---|
47 | if (pvs < lower)
|
---|
48 | {
|
---|
49 | return (float)lower;
|
---|
50 | }
|
---|
51 | else if (pvs > upper)
|
---|
52 | {
|
---|
53 | return (float)upper;
|
---|
54 | }
|
---|
55 |
|
---|
56 | return (float)pvs;
|
---|
57 | }
|
---|
58 |
|
---|
59 |
|
---|
60 | static bool ViewCellHasMultipleReferences(Intersectable *obj,
|
---|
61 | ViewCell *vc,
|
---|
62 | bool checkOnlyMailed)
|
---|
63 | {
|
---|
64 | MailablePvsData *vdata = obj->mViewCellPvs.Find(vc);
|
---|
65 | //return false;
|
---|
66 | if (vdata)
|
---|
67 | {
|
---|
68 | // more than one view cell sees this object inside different kd cells
|
---|
69 | if (!checkOnlyMailed || !vdata->Mailed())
|
---|
70 | {
|
---|
71 | if (checkOnlyMailed)
|
---|
72 | vdata->Mail();
|
---|
73 | //Debug << "sumpdf: " << vdata->mSumPdf << endl;
|
---|
74 | if (vdata->mSumPdf > 1.5f)
|
---|
75 | return true;
|
---|
76 | }
|
---|
77 | }
|
---|
78 |
|
---|
79 | return false;
|
---|
80 | }
|
---|
81 |
|
---|
82 |
|
---|
83 | void VspTreeStatistics::Print(ostream &app) const
|
---|
84 | {
|
---|
85 | app << "=========== VspTree statistics ===============\n";
|
---|
86 |
|
---|
87 | app << setprecision(4);
|
---|
88 |
|
---|
89 | app << "#N_CTIME ( Construction time [s] )\n" << Time() << " \n";
|
---|
90 |
|
---|
91 | app << "#N_NODES ( Number of nodes )\n" << nodes << "\n";
|
---|
92 |
|
---|
93 | app << "#N_INTERIORS ( Number of interior nodes )\n" << Interior() << "\n";
|
---|
94 |
|
---|
95 | app << "#N_LEAVES ( Number of leaves )\n" << Leaves() << "\n";
|
---|
96 |
|
---|
97 | app << "#AXIS_ALIGNED_SPLITS (number of axis aligned splits)\n" << splits[0] + splits[1] + splits[2] << endl;
|
---|
98 |
|
---|
99 | app << "#N_SPLITS ( Number of splits in axes x y z)\n";
|
---|
100 |
|
---|
101 | for (int i = 0; i < 3; ++ i)
|
---|
102 | app << splits[i] << " ";
|
---|
103 | app << endl;
|
---|
104 |
|
---|
105 | app << "#N_PMAXDEPTHLEAVES ( Percentage of leaves at maximum depth )\n"
|
---|
106 | << maxDepthNodes * 100 / (double)Leaves() << endl;
|
---|
107 |
|
---|
108 | app << "#N_PMINPVSLEAVES ( Percentage of leaves with mininimal PVS )\n"
|
---|
109 | << minPvsNodes * 100 / (double)Leaves() << endl;
|
---|
110 |
|
---|
111 | app << "#N_PMINRAYSLEAVES ( Percentage of leaves with minimal number of rays)\n"
|
---|
112 | << minRaysNodes * 100 / (double)Leaves() << endl;
|
---|
113 |
|
---|
114 | app << "#N_MAXCOSTNODES ( Percentage of leaves with terminated because of max cost ratio )\n"
|
---|
115 | << maxCostNodes * 100 / (double)Leaves() << endl;
|
---|
116 |
|
---|
117 | app << "#N_PMINPROBABILITYLEAVES ( Percentage of leaves with mininum probability )\n"
|
---|
118 | << minProbabilityNodes * 100 / (double)Leaves() << endl;
|
---|
119 |
|
---|
120 | app << "#N_PMAXRAYCONTRIBLEAVES ( Percentage of leaves with maximal ray contribution )\n"
|
---|
121 | << maxRayContribNodes * 100 / (double)Leaves() << endl;
|
---|
122 |
|
---|
123 | app << "#N_PMAXDEPTH ( Maximal reached depth )\n" << maxDepth << endl;
|
---|
124 |
|
---|
125 | app << "#N_PMINDEPTH ( Minimal reached depth )\n" << minDepth << endl;
|
---|
126 |
|
---|
127 | app << "#AVGDEPTH ( average depth )\n" << AvgDepth() << endl;
|
---|
128 |
|
---|
129 | app << "#N_INVALIDLEAVES (number of invalid leaves )\n" << invalidLeaves << endl;
|
---|
130 |
|
---|
131 | app << "#N_RAYS (number of rays / leaf)\n" << AvgRays() << endl;
|
---|
132 | //app << "#N_PVS: " << pvs << endl;
|
---|
133 |
|
---|
134 | //app << "#N_MAXOBJECTREFS ( Max number of object refs / leaf )\n" << maxObjectRefs << "\n";
|
---|
135 |
|
---|
136 | app << "========== END OF VspTree statistics ==========\n";
|
---|
137 | }
|
---|
138 |
|
---|
139 |
|
---|
140 |
|
---|
141 | /******************************************************************/
|
---|
142 | /* class VspNode implementation */
|
---|
143 | /******************************************************************/
|
---|
144 |
|
---|
145 |
|
---|
146 | VspNode::VspNode():
|
---|
147 | mParent(NULL), mTreeValid(true), mTimeStamp(0)
|
---|
148 | {}
|
---|
149 |
|
---|
150 |
|
---|
151 | VspNode::VspNode(VspInterior *parent):
|
---|
152 | mParent(parent), mTreeValid(true)
|
---|
153 | {}
|
---|
154 |
|
---|
155 |
|
---|
156 | bool VspNode::IsRoot() const
|
---|
157 | {
|
---|
158 | return mParent == NULL;
|
---|
159 | }
|
---|
160 |
|
---|
161 |
|
---|
162 | VspInterior *VspNode::GetParent()
|
---|
163 | {
|
---|
164 | return mParent;
|
---|
165 | }
|
---|
166 |
|
---|
167 |
|
---|
168 | void VspNode::SetParent(VspInterior *parent)
|
---|
169 | {
|
---|
170 | mParent = parent;
|
---|
171 | }
|
---|
172 |
|
---|
173 |
|
---|
174 | bool VspNode::IsSibling(VspNode *n) const
|
---|
175 | {
|
---|
176 | return ((this != n) && mParent &&
|
---|
177 | (mParent->GetFront() == n) || (mParent->GetBack() == n));
|
---|
178 | }
|
---|
179 |
|
---|
180 |
|
---|
181 | int VspNode::GetDepth() const
|
---|
182 | {
|
---|
183 | int depth = 0;
|
---|
184 | VspNode *p = mParent;
|
---|
185 |
|
---|
186 | while (p)
|
---|
187 | {
|
---|
188 | p = p->mParent;
|
---|
189 | ++ depth;
|
---|
190 | }
|
---|
191 |
|
---|
192 | return depth;
|
---|
193 | }
|
---|
194 |
|
---|
195 |
|
---|
196 | bool VspNode::TreeValid() const
|
---|
197 | {
|
---|
198 | return mTreeValid;
|
---|
199 | }
|
---|
200 |
|
---|
201 |
|
---|
202 | void VspNode::SetTreeValid(const bool v)
|
---|
203 | {
|
---|
204 | mTreeValid = v;
|
---|
205 | }
|
---|
206 |
|
---|
207 |
|
---|
208 | /****************************************************************/
|
---|
209 | /* class VspInterior implementation */
|
---|
210 | /****************************************************************/
|
---|
211 |
|
---|
212 |
|
---|
213 | VspInterior::VspInterior(const AxisAlignedPlane &plane):
|
---|
214 | mPlane(plane), mFront(NULL), mBack(NULL)
|
---|
215 | {}
|
---|
216 |
|
---|
217 |
|
---|
218 | VspInterior::~VspInterior()
|
---|
219 | {
|
---|
220 | DEL_PTR(mFront);
|
---|
221 | DEL_PTR(mBack);
|
---|
222 | }
|
---|
223 |
|
---|
224 |
|
---|
225 | bool VspInterior::IsLeaf() const
|
---|
226 | {
|
---|
227 | return false;
|
---|
228 | }
|
---|
229 |
|
---|
230 |
|
---|
231 | VspNode *VspInterior::GetBack()
|
---|
232 | {
|
---|
233 | return mBack;
|
---|
234 | }
|
---|
235 |
|
---|
236 |
|
---|
237 | VspNode *VspInterior::GetFront()
|
---|
238 | {
|
---|
239 | return mFront;
|
---|
240 | }
|
---|
241 |
|
---|
242 |
|
---|
243 | AxisAlignedPlane VspInterior::GetPlane() const
|
---|
244 | {
|
---|
245 | return mPlane;
|
---|
246 | }
|
---|
247 |
|
---|
248 |
|
---|
249 | float VspInterior::GetPosition() const
|
---|
250 | {
|
---|
251 | return mPlane.mPosition;
|
---|
252 | }
|
---|
253 |
|
---|
254 |
|
---|
255 | int VspInterior::GetAxis() const
|
---|
256 | {
|
---|
257 | return mPlane.mAxis;
|
---|
258 | }
|
---|
259 |
|
---|
260 |
|
---|
261 | void VspInterior::ReplaceChildLink(VspNode *oldChild, VspNode *newChild)
|
---|
262 | {
|
---|
263 | if (mBack == oldChild)
|
---|
264 | mBack = newChild;
|
---|
265 | else
|
---|
266 | mFront = newChild;
|
---|
267 | }
|
---|
268 |
|
---|
269 |
|
---|
270 | void VspInterior::SetupChildLinks(VspNode *front, VspNode *back)
|
---|
271 | {
|
---|
272 | mBack = back;
|
---|
273 | mFront = front;
|
---|
274 | }
|
---|
275 |
|
---|
276 |
|
---|
277 | AxisAlignedBox3 VspInterior::GetBoundingBox() const
|
---|
278 | {
|
---|
279 | return mBoundingBox;
|
---|
280 | }
|
---|
281 |
|
---|
282 |
|
---|
283 | void VspInterior::SetBoundingBox(const AxisAlignedBox3 &box)
|
---|
284 | {
|
---|
285 | mBoundingBox = box;
|
---|
286 | }
|
---|
287 |
|
---|
288 |
|
---|
289 | int VspInterior::Type() const
|
---|
290 | {
|
---|
291 | return Interior;
|
---|
292 | }
|
---|
293 |
|
---|
294 |
|
---|
295 |
|
---|
296 | /****************************************************************/
|
---|
297 | /* class VspLeaf implementation */
|
---|
298 | /****************************************************************/
|
---|
299 |
|
---|
300 |
|
---|
301 | VspLeaf::VspLeaf(): mViewCell(NULL), mPvs(NULL)
|
---|
302 | {
|
---|
303 | }
|
---|
304 |
|
---|
305 |
|
---|
306 | VspLeaf::~VspLeaf()
|
---|
307 | {
|
---|
308 | DEL_PTR(mPvs);
|
---|
309 | CLEAR_CONTAINER(mVssRays);
|
---|
310 | }
|
---|
311 |
|
---|
312 |
|
---|
313 | int VspLeaf::Type() const
|
---|
314 | {
|
---|
315 | return Leaf;
|
---|
316 | }
|
---|
317 |
|
---|
318 |
|
---|
319 | VspLeaf::VspLeaf(ViewCellLeaf *viewCell):
|
---|
320 | mViewCell(viewCell)
|
---|
321 | {
|
---|
322 | }
|
---|
323 |
|
---|
324 |
|
---|
325 | VspLeaf::VspLeaf(VspInterior *parent):
|
---|
326 | VspNode(parent), mViewCell(NULL), mPvs(NULL)
|
---|
327 | {}
|
---|
328 |
|
---|
329 |
|
---|
330 |
|
---|
331 | VspLeaf::VspLeaf(VspInterior *parent, ViewCellLeaf *viewCell):
|
---|
332 | VspNode(parent), mViewCell(viewCell), mPvs(NULL)
|
---|
333 | {
|
---|
334 | }
|
---|
335 |
|
---|
336 | ViewCellLeaf *VspLeaf::GetViewCell() const
|
---|
337 | {
|
---|
338 | return mViewCell;
|
---|
339 | }
|
---|
340 |
|
---|
341 | void VspLeaf::SetViewCell(ViewCellLeaf *viewCell)
|
---|
342 | {
|
---|
343 | mViewCell = viewCell;
|
---|
344 | }
|
---|
345 |
|
---|
346 |
|
---|
347 | bool VspLeaf::IsLeaf() const
|
---|
348 | {
|
---|
349 | return true;
|
---|
350 | }
|
---|
351 |
|
---|
352 |
|
---|
353 | /*************************************************************************/
|
---|
354 | /* class VspTree implementation */
|
---|
355 | /*************************************************************************/
|
---|
356 |
|
---|
357 |
|
---|
358 | VspTree::VspTree():
|
---|
359 | mRoot(NULL),
|
---|
360 | mOutOfBoundsCell(NULL),
|
---|
361 | mStoreRays(false),
|
---|
362 | mTimeStamp(1),
|
---|
363 | mHierarchyManager(NULL)
|
---|
364 | {
|
---|
365 | bool randomize = false;
|
---|
366 | Environment::GetSingleton()->GetBoolValue("VspTree.Construction.randomize", randomize);
|
---|
367 | if (randomize)
|
---|
368 | Randomize(); // initialise random generator for heuristics
|
---|
369 |
|
---|
370 | //-- termination criteria for autopartition
|
---|
371 | Environment::GetSingleton()->GetIntValue("VspTree.Termination.maxDepth", mTermMaxDepth);
|
---|
372 | Environment::GetSingleton()->GetIntValue("VspTree.Termination.minPvs", mTermMinPvs);
|
---|
373 | Environment::GetSingleton()->GetIntValue("VspTree.Termination.minRays", mTermMinRays);
|
---|
374 | Environment::GetSingleton()->GetFloatValue("VspTree.Termination.minProbability", mTermMinProbability);
|
---|
375 | Environment::GetSingleton()->GetFloatValue("VspTree.Termination.maxRayContribution", mTermMaxRayContribution);
|
---|
376 |
|
---|
377 | Environment::GetSingleton()->GetIntValue("VspTree.Termination.missTolerance", mTermMissTolerance);
|
---|
378 | Environment::GetSingleton()->GetIntValue("VspTree.Termination.maxViewCells", mMaxViewCells);
|
---|
379 |
|
---|
380 | //-- max cost ratio for early tree termination
|
---|
381 | Environment::GetSingleton()->GetFloatValue("VspTree.Termination.maxCostRatio", mTermMaxCostRatio);
|
---|
382 |
|
---|
383 | Environment::GetSingleton()->GetFloatValue("VspTree.Termination.minGlobalCostRatio", mTermMinGlobalCostRatio);
|
---|
384 | Environment::GetSingleton()->GetIntValue("VspTree.Termination.globalCostMissTolerance", mTermGlobalCostMissTolerance);
|
---|
385 |
|
---|
386 | //-- factors for bsp tree split plane heuristics
|
---|
387 | Environment::GetSingleton()->GetFloatValue("VspTree.Termination.ct_div_ci", mCtDivCi);
|
---|
388 |
|
---|
389 | //-- partition criteria
|
---|
390 | Environment::GetSingleton()->GetFloatValue("VspTree.Construction.epsilon", mEpsilon);
|
---|
391 | Environment::GetSingleton()->GetFloatValue("VspTree.Construction.renderCostDecreaseWeight", mRenderCostDecreaseWeight);
|
---|
392 |
|
---|
393 | // if only the driving axis is used for axis aligned split
|
---|
394 | Environment::GetSingleton()->GetBoolValue("VspTree.splitUseOnlyDrivingAxis", mOnlyDrivingAxis);
|
---|
395 |
|
---|
396 | Environment::GetSingleton()->GetIntValue("VspTree.maxTests", mMaxTests);
|
---|
397 | Environment::GetSingleton()->GetFloatValue("VspTree.maxStaticMemory", mMaxMemory);
|
---|
398 |
|
---|
399 | Environment::GetSingleton()->GetBoolValue("VspTree.useCostHeuristics", mUseCostHeuristics);
|
---|
400 | Environment::GetSingleton()->GetBoolValue("VspTree.simulateOctree", mCirculatingAxis);
|
---|
401 |
|
---|
402 | //Environment::GetSingleton()->GetBoolValue("VspTree.useKdPvsForHeuristics", mUseKdPvsForHeuristics);
|
---|
403 |
|
---|
404 | char subdivisionStatsLog[100];
|
---|
405 | Environment::GetSingleton()->GetStringValue("VspTree.subdivisionStats", subdivisionStatsLog);
|
---|
406 | mSubdivisionStats.open(subdivisionStatsLog);
|
---|
407 |
|
---|
408 | Environment::GetSingleton()->GetFloatValue("VspTree.Construction.minBand", mMinBand);
|
---|
409 | Environment::GetSingleton()->GetFloatValue("VspTree.Construction.maxBand", mMaxBand);
|
---|
410 |
|
---|
411 |
|
---|
412 | //-- debug output
|
---|
413 |
|
---|
414 | Debug << "******* VSP options ******** " << endl;
|
---|
415 |
|
---|
416 | Debug << "max depth: " << mTermMaxDepth << endl;
|
---|
417 | Debug << "min PVS: " << mTermMinPvs << endl;
|
---|
418 | Debug << "min probabiliy: " << mTermMinProbability << endl;
|
---|
419 | Debug << "min rays: " << mTermMinRays << endl;
|
---|
420 | Debug << "max ray contri: " << mTermMaxRayContribution << endl;
|
---|
421 | Debug << "max cost ratio: " << mTermMaxCostRatio << endl;
|
---|
422 | Debug << "miss tolerance: " << mTermMissTolerance << endl;
|
---|
423 | Debug << "max view cells: " << mMaxViewCells << endl;
|
---|
424 | Debug << "randomize: " << randomize << endl;
|
---|
425 |
|
---|
426 | Debug << "min global cost ratio: " << mTermMinGlobalCostRatio << endl;
|
---|
427 | Debug << "global cost miss tolerance: " << mTermGlobalCostMissTolerance << endl;
|
---|
428 | Debug << "only driving axis: " << mOnlyDrivingAxis << endl;
|
---|
429 | Debug << "max memory: " << mMaxMemory << endl;
|
---|
430 | Debug << "use cost heuristics: " << mUseCostHeuristics << endl;
|
---|
431 | Debug << "subdivision stats log: " << subdivisionStatsLog << endl;
|
---|
432 | Debug << "render cost decrease weight: " << mRenderCostDecreaseWeight << endl;
|
---|
433 |
|
---|
434 | Debug << "circulating axis: " << mCirculatingAxis << endl;
|
---|
435 | Debug << "minband: " << mMinBand << endl;
|
---|
436 | Debug << "maxband: " << mMaxBand << endl;
|
---|
437 |
|
---|
438 | mLocalSubdivisionCandidates = new vector<SortableEntry>;
|
---|
439 |
|
---|
440 | Debug << endl;
|
---|
441 | }
|
---|
442 |
|
---|
443 |
|
---|
444 | VspViewCell *VspTree::GetOutOfBoundsCell()
|
---|
445 | {
|
---|
446 | return mOutOfBoundsCell;
|
---|
447 | }
|
---|
448 |
|
---|
449 |
|
---|
450 | VspViewCell *VspTree::GetOrCreateOutOfBoundsCell()
|
---|
451 | {
|
---|
452 | if (!mOutOfBoundsCell)
|
---|
453 | {
|
---|
454 | mOutOfBoundsCell = new VspViewCell();
|
---|
455 | mOutOfBoundsCell->SetId(-1);
|
---|
456 | mOutOfBoundsCell->SetValid(false);
|
---|
457 | }
|
---|
458 |
|
---|
459 | return mOutOfBoundsCell;
|
---|
460 | }
|
---|
461 |
|
---|
462 |
|
---|
463 | const VspTreeStatistics &VspTree::GetStatistics() const
|
---|
464 | {
|
---|
465 | return mVspStats;
|
---|
466 | }
|
---|
467 |
|
---|
468 |
|
---|
469 | VspTree::~VspTree()
|
---|
470 | {
|
---|
471 | DEL_PTR(mRoot);
|
---|
472 | DEL_PTR(mLocalSubdivisionCandidates);
|
---|
473 | }
|
---|
474 |
|
---|
475 |
|
---|
476 | void VspTree::ComputeBoundingBox(const VssRayContainer &rays,
|
---|
477 | AxisAlignedBox3 *forcedBoundingBox)
|
---|
478 | {
|
---|
479 | if (forcedBoundingBox)
|
---|
480 | {
|
---|
481 | mBoundingBox = *forcedBoundingBox;
|
---|
482 | }
|
---|
483 | else // compute vsp tree bounding box
|
---|
484 | {
|
---|
485 | mBoundingBox.Initialize();
|
---|
486 | VssRayContainer::const_iterator rit, rit_end = rays.end();
|
---|
487 |
|
---|
488 | //-- compute bounding box
|
---|
489 | for (rit = rays.begin(); rit != rit_end; ++ rit)
|
---|
490 | {
|
---|
491 | VssRay *ray = *rit;
|
---|
492 |
|
---|
493 | // compute bounding box of view space
|
---|
494 | mBoundingBox.Include(ray->GetTermination());
|
---|
495 | mBoundingBox.Include(ray->GetOrigin());
|
---|
496 | }
|
---|
497 | }
|
---|
498 | }
|
---|
499 |
|
---|
500 |
|
---|
501 | void VspTree::AddSubdivisionStats(const int viewCells,
|
---|
502 | const float renderCostDecr,
|
---|
503 | const float totalRenderCost,
|
---|
504 | const float avgRenderCost)
|
---|
505 | {
|
---|
506 | mSubdivisionStats
|
---|
507 | << "#ViewCells\n" << viewCells << endl
|
---|
508 | << "#RenderCostDecrease\n" << renderCostDecr << endl
|
---|
509 | << "#TotalRenderCost\n" << totalRenderCost << endl
|
---|
510 | << "#AvgRenderCost\n" << avgRenderCost << endl;
|
---|
511 | }
|
---|
512 |
|
---|
513 |
|
---|
514 | // TODO: return memory usage in MB
|
---|
515 | float VspTree::GetMemUsage() const
|
---|
516 | {
|
---|
517 | return (float)
|
---|
518 | (sizeof(VspTree) +
|
---|
519 | mVspStats.Leaves() * sizeof(VspLeaf) +
|
---|
520 | mCreatedViewCells * sizeof(VspViewCell) +
|
---|
521 | mVspStats.pvs * sizeof(PvsData) +
|
---|
522 | mVspStats.Interior() * sizeof(VspInterior) +
|
---|
523 | mVspStats.accumRays * sizeof(RayInfo)) / (1024.0f * 1024.0f);
|
---|
524 | }
|
---|
525 |
|
---|
526 |
|
---|
527 | inline bool VspTree::LocalTerminationCriteriaMet(const VspTraversalData &data) const
|
---|
528 | {
|
---|
529 | const bool localTerminationCriteriaMet = (
|
---|
530 | ((int)data.mRays->size() <= mTermMinRays) ||
|
---|
531 | (data.mPvs <= mTermMinPvs) ||
|
---|
532 | (data.mProbability <= mTermMinProbability) ||
|
---|
533 | (data.GetAvgRayContribution() > mTermMaxRayContribution) ||
|
---|
534 | (data.mDepth >= mTermMaxDepth)
|
---|
535 | );
|
---|
536 |
|
---|
537 | if (0 && localTerminationCriteriaMet)
|
---|
538 | {
|
---|
539 | Debug << "********local termination *********" << endl;
|
---|
540 | Debug << "rays: " << (int)data.mRays->size() << " " << mTermMinRays << endl;
|
---|
541 | Debug << "pvs: " << data.mPvs << " " << mTermMinPvs << endl;
|
---|
542 | Debug << "p: " << data.mProbability << " " << mTermMinProbability << endl;
|
---|
543 | Debug << "avg contri: " << data.GetAvgRayContribution() << " " << mTermMaxRayContribution << endl;
|
---|
544 | Debug << "depth " << data.mDepth << " " << mTermMaxDepth << endl;
|
---|
545 | }
|
---|
546 |
|
---|
547 | return localTerminationCriteriaMet;
|
---|
548 |
|
---|
549 | }
|
---|
550 |
|
---|
551 |
|
---|
552 | inline bool VspTree::GlobalTerminationCriteriaMet(const VspTraversalData &data) const
|
---|
553 | {
|
---|
554 | const bool terminationCriteriaMet = (
|
---|
555 | // mOutOfMemory ||
|
---|
556 | (mVspStats.Leaves() >= mMaxViewCells) ||
|
---|
557 | (mGlobalCostMisses >= mTermGlobalCostMissTolerance)
|
---|
558 | );
|
---|
559 |
|
---|
560 | if (0 && terminationCriteriaMet)
|
---|
561 | {
|
---|
562 | Debug << "********* terminationCriteriaMet *********" << endl;
|
---|
563 | Debug << "cost misses: " << mGlobalCostMisses << " " << mTermGlobalCostMissTolerance << endl;
|
---|
564 | Debug << "leaves: " << mVspStats.Leaves() << " " << mMaxViewCells << endl;
|
---|
565 | }
|
---|
566 | return terminationCriteriaMet;
|
---|
567 | }
|
---|
568 |
|
---|
569 |
|
---|
570 | void VspTree::CreateViewCell(VspTraversalData &tData, const bool updatePvs)
|
---|
571 | {
|
---|
572 | //-- create new view cell
|
---|
573 | VspLeaf *leaf = dynamic_cast<VspLeaf *>(tData.mNode);
|
---|
574 |
|
---|
575 | VspViewCell *viewCell = new VspViewCell();
|
---|
576 | leaf->SetViewCell(viewCell);
|
---|
577 |
|
---|
578 | int conSamp = 0;
|
---|
579 | float sampCon = 0.0f;
|
---|
580 |
|
---|
581 | if (updatePvs)
|
---|
582 | {
|
---|
583 | //-- update pvs of view cell
|
---|
584 | AddSamplesToPvs(leaf, *tData.mRays, sampCon, conSamp);
|
---|
585 |
|
---|
586 | // update scalar pvs size value
|
---|
587 | ObjectPvs &pvs = viewCell->GetPvs();
|
---|
588 | mViewCellsManager->UpdateScalarPvsSize(viewCell, pvs.CountObjectsInPvs(), pvs.GetSize());
|
---|
589 |
|
---|
590 | mVspStats.contributingSamples += conSamp;
|
---|
591 | mVspStats.sampleContributions += (int)sampCon;
|
---|
592 | }
|
---|
593 |
|
---|
594 |
|
---|
595 | //-- store additional info
|
---|
596 | if (mStoreRays)
|
---|
597 | {
|
---|
598 | RayInfoContainer::const_iterator it, it_end = tData.mRays->end();
|
---|
599 |
|
---|
600 | for (it = tData.mRays->begin(); it != it_end; ++ it)
|
---|
601 | {
|
---|
602 | (*it).mRay->Ref();
|
---|
603 | leaf->mVssRays.push_back((*it).mRay);
|
---|
604 | }
|
---|
605 | }
|
---|
606 |
|
---|
607 | // set view cell values
|
---|
608 | viewCell->mLeaf = leaf;
|
---|
609 |
|
---|
610 | viewCell->SetVolume(tData.mProbability);
|
---|
611 | leaf->mProbability = tData.mProbability;
|
---|
612 | }
|
---|
613 |
|
---|
614 |
|
---|
615 | void VspTree::EvalSubdivisionStats(const SubdivisionCandidate &sc)
|
---|
616 | {
|
---|
617 | const float costDecr = sc.GetRenderCostDecrease();
|
---|
618 |
|
---|
619 | AddSubdivisionStats(mVspStats.Leaves(),
|
---|
620 | costDecr,
|
---|
621 | mTotalCost,
|
---|
622 | (float)mTotalPvsSize / (float)mVspStats.Leaves());
|
---|
623 | }
|
---|
624 |
|
---|
625 |
|
---|
626 | VspNode *VspTree::Subdivide(SplitQueue &tQueue,
|
---|
627 | SubdivisionCandidate *splitCandidate,
|
---|
628 | const bool globalCriteriaMet)
|
---|
629 | {
|
---|
630 | // todo remove dynamic cast
|
---|
631 | VspSubdivisionCandidate *sc = dynamic_cast<VspSubdivisionCandidate *>(splitCandidate);
|
---|
632 | VspTraversalData &tData = sc->mParentData;
|
---|
633 |
|
---|
634 | VspNode *newNode = tData.mNode;
|
---|
635 |
|
---|
636 |
|
---|
637 | if (!LocalTerminationCriteriaMet(tData) && !globalCriteriaMet)
|
---|
638 | {
|
---|
639 | VspTraversalData tFrontData;
|
---|
640 | VspTraversalData tBackData;
|
---|
641 |
|
---|
642 | //-- continue subdivision
|
---|
643 |
|
---|
644 | // create new interior node and two leaf node
|
---|
645 | const AxisAlignedPlane splitPlane = sc->mSplitPlane;
|
---|
646 | newNode = SubdivideNode(splitPlane, tData, tFrontData, tBackData);
|
---|
647 |
|
---|
648 | const int maxCostMisses = sc->mMaxCostMisses;
|
---|
649 |
|
---|
650 |
|
---|
651 | // how often was max cost ratio missed in this branch?
|
---|
652 | tFrontData.mMaxCostMisses = maxCostMisses;
|
---|
653 | tBackData.mMaxCostMisses = maxCostMisses;
|
---|
654 |
|
---|
655 | mTotalCost -= sc->GetRenderCostDecrease();
|
---|
656 | mTotalPvsSize += tFrontData.mPvs + tBackData.mPvs - tData.mPvs;
|
---|
657 |
|
---|
658 | // subdivision statistics
|
---|
659 | if (1) EvalSubdivisionStats(*sc);
|
---|
660 |
|
---|
661 | //-- evaluate new split candidates for global greedy cost heuristics
|
---|
662 |
|
---|
663 | VspSubdivisionCandidate *frontCandidate = new VspSubdivisionCandidate(tFrontData);
|
---|
664 | VspSubdivisionCandidate *backCandidate = new VspSubdivisionCandidate(tBackData);
|
---|
665 |
|
---|
666 | EvalSubdivisionCandidate(*frontCandidate);
|
---|
667 | EvalSubdivisionCandidate(*backCandidate);
|
---|
668 |
|
---|
669 | tQueue.Push(frontCandidate);
|
---|
670 | tQueue.Push(backCandidate);
|
---|
671 |
|
---|
672 | // delete old view cell
|
---|
673 | delete tData.mNode->mViewCell;
|
---|
674 |
|
---|
675 | // delete old leaf node
|
---|
676 | DEL_PTR(tData.mNode);
|
---|
677 | }
|
---|
678 |
|
---|
679 | if (newNode->IsLeaf()) // subdivision terminated
|
---|
680 | {
|
---|
681 | // view cell is created during subdivision
|
---|
682 | //CreateViewCell(tData);
|
---|
683 |
|
---|
684 | VspLeaf *leaf = dynamic_cast<VspLeaf *>(newNode);
|
---|
685 | ViewCell *viewCell = leaf->GetViewCell();
|
---|
686 |
|
---|
687 | int conSamp = 0;
|
---|
688 | float sampCon = 0.0f;
|
---|
689 |
|
---|
690 | #if 0
|
---|
691 | //-- store pvs optained from rays
|
---|
692 |
|
---|
693 | AddSamplesToPvs(leaf, *tData.mRays, sampCon, conSamp);
|
---|
694 |
|
---|
695 | // update scalar pvs size value
|
---|
696 | ObjectPvs &pvs = viewCell->GetPvs();
|
---|
697 | mViewCellsManager->UpdateScalarPvsSize(viewCell, pvs.CountObjectsInPvs(), pvs.GetSize());
|
---|
698 |
|
---|
699 | mVspStats.contributingSamples += conSamp;
|
---|
700 | mVspStats.sampleContributions += (int)sampCon;
|
---|
701 | #endif
|
---|
702 | //-- store additional info
|
---|
703 | if (mStoreRays)
|
---|
704 | {
|
---|
705 | RayInfoContainer::const_iterator it, it_end = tData.mRays->end();
|
---|
706 | for (it = tData.mRays->begin(); it != it_end; ++ it)
|
---|
707 | {
|
---|
708 | (*it).mRay->Ref();
|
---|
709 | leaf->mVssRays.push_back((*it).mRay);
|
---|
710 | }
|
---|
711 | }
|
---|
712 |
|
---|
713 | // finally evaluate statistics for this leaf
|
---|
714 | EvaluateLeafStats(tData);
|
---|
715 | }
|
---|
716 |
|
---|
717 | //-- cleanup
|
---|
718 | tData.Clear();
|
---|
719 |
|
---|
720 | return newNode;
|
---|
721 | }
|
---|
722 |
|
---|
723 |
|
---|
724 | void VspTree::EvalSubdivisionCandidate(VspSubdivisionCandidate &splitCandidate)
|
---|
725 | {
|
---|
726 | float frontProb;
|
---|
727 | float backProb;
|
---|
728 |
|
---|
729 | VspLeaf *leaf = dynamic_cast<VspLeaf *>(splitCandidate.mParentData.mNode);
|
---|
730 |
|
---|
731 | // compute locally best split plane
|
---|
732 | const float ratio = SelectSplitPlane(
|
---|
733 | splitCandidate.mParentData,
|
---|
734 | splitCandidate.mSplitPlane,
|
---|
735 | frontProb,
|
---|
736 | backProb);
|
---|
737 |
|
---|
738 | const bool success = ratio < mTermMaxCostRatio;
|
---|
739 |
|
---|
740 | float oldRenderCost;
|
---|
741 |
|
---|
742 | // compute global decrease in render cost
|
---|
743 | const float renderCostDecr = EvalRenderCostDecrease(splitCandidate.mSplitPlane,
|
---|
744 | splitCandidate.mParentData,
|
---|
745 | oldRenderCost);
|
---|
746 |
|
---|
747 | splitCandidate.SetRenderCostDecrease(renderCostDecr);
|
---|
748 |
|
---|
749 | #if 0
|
---|
750 | const float priority = (float)-data.mDepth;
|
---|
751 | #else
|
---|
752 |
|
---|
753 | // take render cost of node into account
|
---|
754 | // otherwise danger of being stuck in a local minimum!!
|
---|
755 | const float factor = mRenderCostDecreaseWeight;
|
---|
756 | const float priority = factor * renderCostDecr + (1.0f - factor) * oldRenderCost;
|
---|
757 | #endif
|
---|
758 |
|
---|
759 | splitCandidate.SetPriority(priority);
|
---|
760 |
|
---|
761 | // max cost threshold violated?
|
---|
762 | splitCandidate.mMaxCostMisses =
|
---|
763 | success ? splitCandidate.mParentData.mMaxCostMisses : splitCandidate.mParentData.mMaxCostMisses + 1;
|
---|
764 | //Debug << "p: " << tData.mNode << " depth: " << tData.mDepth << endl;
|
---|
765 | }
|
---|
766 |
|
---|
767 |
|
---|
768 | VspInterior *VspTree::SubdivideNode(const AxisAlignedPlane &splitPlane,
|
---|
769 | VspTraversalData &tData,
|
---|
770 | VspTraversalData &frontData,
|
---|
771 | VspTraversalData &backData)
|
---|
772 | {
|
---|
773 | VspLeaf *leaf = dynamic_cast<VspLeaf *>(tData.mNode);
|
---|
774 |
|
---|
775 | //-- the front and back traversal data is filled with the new values
|
---|
776 |
|
---|
777 | frontData.mDepth = tData.mDepth + 1;
|
---|
778 | backData.mDepth = tData.mDepth + 1;
|
---|
779 |
|
---|
780 | frontData.mRays = new RayInfoContainer();
|
---|
781 | backData.mRays = new RayInfoContainer();
|
---|
782 |
|
---|
783 | //-- subdivide rays
|
---|
784 | SplitRays(splitPlane,
|
---|
785 | *tData.mRays,
|
---|
786 | *frontData.mRays,
|
---|
787 | *backData.mRays);
|
---|
788 |
|
---|
789 | //Debug << "f: " << frontData.mRays->size() << " b: " << backData.mRays->size() << "d: " << tData.mRays->size() << endl;
|
---|
790 |
|
---|
791 | //-- compute pvs
|
---|
792 | frontData.mPvs = EvalPvsSize(*frontData.mRays);
|
---|
793 | backData.mPvs = EvalPvsSize(*backData.mRays);
|
---|
794 |
|
---|
795 | // split front and back node geometry and compute area
|
---|
796 | tData.mBoundingBox.Split(splitPlane.mAxis, splitPlane.mPosition,
|
---|
797 | frontData.mBoundingBox, backData.mBoundingBox);
|
---|
798 |
|
---|
799 |
|
---|
800 | frontData.mProbability = frontData.mBoundingBox.GetVolume();
|
---|
801 | backData.mProbability = tData.mProbability - frontData.mProbability;
|
---|
802 |
|
---|
803 |
|
---|
804 | ///////////////////////////////////////////
|
---|
805 | // subdivide further
|
---|
806 |
|
---|
807 | // store maximal and minimal depth
|
---|
808 | if (tData.mDepth > mVspStats.maxDepth)
|
---|
809 | {
|
---|
810 | Debug << "max depth increases to " << tData.mDepth << " at " << mVspStats.Leaves() << " leaves" << endl;
|
---|
811 | mVspStats.maxDepth = tData.mDepth;
|
---|
812 | }
|
---|
813 |
|
---|
814 | // two more leaves
|
---|
815 | mVspStats.nodes += 2;
|
---|
816 |
|
---|
817 | VspInterior *interior = new VspInterior(splitPlane);
|
---|
818 |
|
---|
819 | #ifdef _DEBUG
|
---|
820 | Debug << interior << endl;
|
---|
821 | #endif+
|
---|
822 |
|
---|
823 |
|
---|
824 | //-- create front and back leaf
|
---|
825 |
|
---|
826 | VspInterior *parent = leaf->GetParent();
|
---|
827 |
|
---|
828 | // replace a link from node's parent
|
---|
829 | if (parent)
|
---|
830 | {
|
---|
831 | parent->ReplaceChildLink(leaf, interior);
|
---|
832 | interior->SetParent(parent);
|
---|
833 |
|
---|
834 | // remove "parent" view cell from pvs of all objects (traverse trough rays)
|
---|
835 | RemoveParentViewCellReferences(tData.mNode->GetViewCell());
|
---|
836 | }
|
---|
837 | else // new root
|
---|
838 | {
|
---|
839 | mRoot = interior;
|
---|
840 | }
|
---|
841 |
|
---|
842 | VspLeaf *frontLeaf = new VspLeaf(interior);
|
---|
843 | VspLeaf *backLeaf = new VspLeaf(interior);
|
---|
844 |
|
---|
845 | // and setup child links
|
---|
846 | interior->SetupChildLinks(frontLeaf, backLeaf);
|
---|
847 |
|
---|
848 | // add bounding box
|
---|
849 | interior->SetBoundingBox(tData.mBoundingBox);
|
---|
850 |
|
---|
851 | // set front and back leaf
|
---|
852 | frontData.mNode = frontLeaf;
|
---|
853 | backData.mNode = backLeaf;
|
---|
854 |
|
---|
855 | // explicitely create front and back view cell
|
---|
856 | CreateViewCell(frontData, false);
|
---|
857 | CreateViewCell(backData, false);
|
---|
858 |
|
---|
859 |
|
---|
860 | #if WORK_WITH_VIEWCELL_PVS
|
---|
861 | // create front and back view cell
|
---|
862 | // add front and back view cell to "Potentially Visbilie View Cells"
|
---|
863 | // of the objects in front and back pvs
|
---|
864 |
|
---|
865 | AddViewCellReferences(frontLeaf->GetViewCell());
|
---|
866 | AddViewCellReferences(backLeaf->GetViewCell());
|
---|
867 | #endif
|
---|
868 |
|
---|
869 | interior->mTimeStamp = mTimeStamp ++;
|
---|
870 |
|
---|
871 | return interior;
|
---|
872 | }
|
---|
873 |
|
---|
874 |
|
---|
875 | void VspTree::RemoveParentViewCellReferences(ViewCell *parent) const
|
---|
876 | {
|
---|
877 | KdLeaf::NewMail();
|
---|
878 |
|
---|
879 | // remove the parents from the object pvss
|
---|
880 | ObjectPvsMap::const_iterator oit, oit_end = parent->GetPvs().mEntries.end();
|
---|
881 |
|
---|
882 | for (oit = parent->GetPvs().mEntries.begin(); oit != oit_end; ++ oit)
|
---|
883 | {
|
---|
884 | Intersectable *object = (*oit).first;
|
---|
885 | // HACK: make sure that the view cell is removed from the pvs
|
---|
886 | const float high_contri = 9999999;
|
---|
887 |
|
---|
888 | // remove reference count of view cells
|
---|
889 | object->mViewCellPvs.RemoveSample(parent, high_contri);
|
---|
890 | }
|
---|
891 | }
|
---|
892 |
|
---|
893 |
|
---|
894 | void VspTree::AddViewCellReferences(ViewCell *vc) const
|
---|
895 | {
|
---|
896 | KdLeaf::NewMail();
|
---|
897 |
|
---|
898 | // Add front view cell to the object pvsss
|
---|
899 | ObjectPvsMap::const_iterator oit, oit_end = vc->GetPvs().mEntries.end();
|
---|
900 |
|
---|
901 | for (oit = vc->GetPvs().mEntries.begin(); oit != oit_end; ++ oit)
|
---|
902 | {
|
---|
903 | Intersectable *object = (*oit).first;
|
---|
904 |
|
---|
905 | // increase reference count of view cells
|
---|
906 | object->mViewCellPvs.AddSample(vc, 1);
|
---|
907 | }
|
---|
908 | }
|
---|
909 |
|
---|
910 |
|
---|
911 |
|
---|
912 |
|
---|
913 | void VspTree::AddSamplesToPvs(VspLeaf *leaf,
|
---|
914 | const RayInfoContainer &rays,
|
---|
915 | float &sampleContributions,
|
---|
916 | int &contributingSamples)
|
---|
917 | {
|
---|
918 | sampleContributions = 0;
|
---|
919 | contributingSamples = 0;
|
---|
920 |
|
---|
921 | RayInfoContainer::const_iterator it, it_end = rays.end();
|
---|
922 |
|
---|
923 | ViewCellLeaf *vc = leaf->GetViewCell();
|
---|
924 |
|
---|
925 | // add contributions from samples to the PVS
|
---|
926 | for (it = rays.begin(); it != it_end; ++ it)
|
---|
927 | {
|
---|
928 | float sc = 0.0f;
|
---|
929 | VssRay *ray = (*it).mRay;
|
---|
930 |
|
---|
931 | bool madeContrib = false;
|
---|
932 | float contribution;
|
---|
933 |
|
---|
934 | Intersectable *obj = ray->mTerminationObject;
|
---|
935 |
|
---|
936 | if (obj)
|
---|
937 | {
|
---|
938 | madeContrib =
|
---|
939 | mViewCellsManager->AddSampleToPvs(
|
---|
940 | obj,
|
---|
941 | ray->mTermination,
|
---|
942 | vc,
|
---|
943 | ray->mPdf,
|
---|
944 | contribution);
|
---|
945 |
|
---|
946 | sc += contribution;
|
---|
947 | }
|
---|
948 |
|
---|
949 | obj = ray->mOriginObject;
|
---|
950 |
|
---|
951 | if (obj)
|
---|
952 | {
|
---|
953 | madeContrib =
|
---|
954 | mViewCellsManager->AddSampleToPvs(
|
---|
955 | obj,
|
---|
956 | ray->mOrigin,
|
---|
957 | vc,
|
---|
958 | ray->mPdf,
|
---|
959 | contribution);
|
---|
960 |
|
---|
961 | sc += contribution;
|
---|
962 | }
|
---|
963 |
|
---|
964 | if (madeContrib)
|
---|
965 | {
|
---|
966 | ++ contributingSamples;
|
---|
967 | }
|
---|
968 |
|
---|
969 | // store rays for visualization
|
---|
970 | if (0) leaf->mVssRays.push_back(new VssRay(*ray));
|
---|
971 | }
|
---|
972 | }
|
---|
973 |
|
---|
974 |
|
---|
975 | void VspTree::SortSubdivisionCandidates(const RayInfoContainer &rays,
|
---|
976 | const int axis,
|
---|
977 | float minBand,
|
---|
978 | float maxBand)
|
---|
979 | {
|
---|
980 | mLocalSubdivisionCandidates->clear();
|
---|
981 |
|
---|
982 | int requestedSize = 2 * (int)(rays.size());
|
---|
983 |
|
---|
984 | // creates a sorted split candidates array
|
---|
985 | if (mLocalSubdivisionCandidates->capacity() > 500000 &&
|
---|
986 | requestedSize < (int)(mLocalSubdivisionCandidates->capacity() / 10) )
|
---|
987 | {
|
---|
988 | delete mLocalSubdivisionCandidates;
|
---|
989 | mLocalSubdivisionCandidates = new vector<SortableEntry>;
|
---|
990 | }
|
---|
991 |
|
---|
992 | mLocalSubdivisionCandidates->reserve(requestedSize);
|
---|
993 |
|
---|
994 |
|
---|
995 | float pos;
|
---|
996 |
|
---|
997 | RayInfoContainer::const_iterator rit, rit_end = rays.end();
|
---|
998 |
|
---|
999 | //-- insert all queries
|
---|
1000 | for (rit = rays.begin(); rit != rit_end; ++ rit)
|
---|
1001 | {
|
---|
1002 | const bool positive = (*rit).mRay->HasPosDir(axis);
|
---|
1003 |
|
---|
1004 | pos = (*rit).ExtrapOrigin(axis);
|
---|
1005 |
|
---|
1006 | mLocalSubdivisionCandidates->push_back(SortableEntry(positive ? SortableEntry::ERayMin : SortableEntry::ERayMax,
|
---|
1007 | pos, (*rit).mRay));
|
---|
1008 |
|
---|
1009 | pos = (*rit).ExtrapTermination(axis);
|
---|
1010 |
|
---|
1011 | mLocalSubdivisionCandidates->push_back(SortableEntry(positive ? SortableEntry::ERayMax : SortableEntry::ERayMin,
|
---|
1012 | pos, (*rit).mRay));
|
---|
1013 | }
|
---|
1014 |
|
---|
1015 | stable_sort(mLocalSubdivisionCandidates->begin(), mLocalSubdivisionCandidates->end());
|
---|
1016 | }
|
---|
1017 |
|
---|
1018 |
|
---|
1019 | int VspTree::GetPvsContribution(Intersectable *object) const
|
---|
1020 | {
|
---|
1021 | int pvsContri = 0;
|
---|
1022 |
|
---|
1023 | KdPvsMap::const_iterator kit, kit_end = object->mKdPvs.mEntries.end();
|
---|
1024 |
|
---|
1025 | Intersectable::NewMail();
|
---|
1026 |
|
---|
1027 | // Search kd leaves this object is attached to
|
---|
1028 | for (kit = object->mKdPvs.mEntries.begin(); kit != kit_end; ++ kit)
|
---|
1029 | {
|
---|
1030 | KdNode *l = (*kit).first;
|
---|
1031 |
|
---|
1032 | // new object found during sweep
|
---|
1033 | // => increase pvs contribution of this kd node
|
---|
1034 | if (!l->Mailed())
|
---|
1035 | {
|
---|
1036 | l->Mail();
|
---|
1037 | ++ pvsContri;
|
---|
1038 | }
|
---|
1039 | }
|
---|
1040 |
|
---|
1041 | return pvsContri;
|
---|
1042 | }
|
---|
1043 |
|
---|
1044 |
|
---|
1045 | int VspTree::PrepareHeuristics(const VssRay &ray, const bool isTermination)
|
---|
1046 | {
|
---|
1047 | int pvsSize = 0;
|
---|
1048 |
|
---|
1049 | Intersectable *obj;
|
---|
1050 | Vector3 pt;
|
---|
1051 | KdNode *node;
|
---|
1052 |
|
---|
1053 | ray.GetSampleData(isTermination, pt, &obj, &node);
|
---|
1054 |
|
---|
1055 | if (!obj)
|
---|
1056 | return 0;
|
---|
1057 |
|
---|
1058 | switch (mHierarchyManager->GetObjectSpaceSubdivisonType())
|
---|
1059 | {
|
---|
1060 | case HierarchyManager::NO_OBJ_SUBDIV:
|
---|
1061 | {
|
---|
1062 | if (!obj->Mailed())
|
---|
1063 | {
|
---|
1064 | obj->Mail();
|
---|
1065 | obj->mCounter = 1;
|
---|
1066 |
|
---|
1067 | ++ pvsSize;
|
---|
1068 | }
|
---|
1069 | else
|
---|
1070 | {
|
---|
1071 | ++ obj->mCounter;
|
---|
1072 | }
|
---|
1073 | break;
|
---|
1074 | }
|
---|
1075 | case HierarchyManager::KD_BASED_OBJ_SUBDIV:
|
---|
1076 | {
|
---|
1077 | KdLeaf *leaf = mHierarchyManager->mOspTree->GetLeaf(pt, node);
|
---|
1078 | pvsSize += PrepareHeuristics(leaf);
|
---|
1079 | break;
|
---|
1080 | }
|
---|
1081 | case HierarchyManager::BV_BASED_OBJ_SUBDIV:
|
---|
1082 | {
|
---|
1083 | BvhLeaf *leaf = mHierarchyManager->mBvHierarchy->GetLeaf(obj, NULL);
|
---|
1084 |
|
---|
1085 | if (!leaf->Mailed())
|
---|
1086 | {
|
---|
1087 | leaf->Mail();
|
---|
1088 | leaf->mCounter = 1;
|
---|
1089 |
|
---|
1090 | ++ pvsSize;
|
---|
1091 | }
|
---|
1092 | else
|
---|
1093 | {
|
---|
1094 | ++ leaf->mCounter;
|
---|
1095 | }
|
---|
1096 | break;
|
---|
1097 | }
|
---|
1098 | default:
|
---|
1099 | break;
|
---|
1100 | }
|
---|
1101 |
|
---|
1102 | return pvsSize;
|
---|
1103 | }
|
---|
1104 |
|
---|
1105 |
|
---|
1106 | int VspTree::PrepareHeuristics(KdLeaf *leaf)
|
---|
1107 | {
|
---|
1108 | int pvsSize = 0;
|
---|
1109 |
|
---|
1110 | if (!leaf->Mailed())
|
---|
1111 | {
|
---|
1112 | leaf->Mail();
|
---|
1113 | leaf->mCounter = 1;
|
---|
1114 |
|
---|
1115 | // add objects without the objects which are in several kd leaves
|
---|
1116 | pvsSize += (int)(leaf->mObjects.size() - leaf->mMultipleObjects.size());
|
---|
1117 | //Debug << "adding " << (int)leaf->mObjects.size() << " " << leaf->mMultipleObjects.size() << endl;
|
---|
1118 | }
|
---|
1119 | else
|
---|
1120 | {
|
---|
1121 | ++ leaf->mCounter;
|
---|
1122 | }
|
---|
1123 |
|
---|
1124 | //-- the objects belonging to several leaves must be handled seperately
|
---|
1125 |
|
---|
1126 | ObjectContainer::const_iterator oit, oit_end = leaf->mMultipleObjects.end();
|
---|
1127 |
|
---|
1128 | for (oit = leaf->mMultipleObjects.begin(); oit != oit_end; ++ oit)
|
---|
1129 | {
|
---|
1130 | Intersectable *object = *oit;
|
---|
1131 |
|
---|
1132 | if (!object->Mailed())
|
---|
1133 | {
|
---|
1134 | object->Mail();
|
---|
1135 | object->mCounter = 1;
|
---|
1136 |
|
---|
1137 | ++ pvsSize;
|
---|
1138 | }
|
---|
1139 | else
|
---|
1140 | {
|
---|
1141 | ++ object->mCounter;
|
---|
1142 | }
|
---|
1143 | }
|
---|
1144 |
|
---|
1145 | return pvsSize;
|
---|
1146 | }
|
---|
1147 |
|
---|
1148 |
|
---|
1149 | int VspTree::PrepareHeuristics(const RayInfoContainer &rays)
|
---|
1150 | {
|
---|
1151 | Intersectable::NewMail();
|
---|
1152 | KdNode::NewMail();
|
---|
1153 |
|
---|
1154 | int pvsSize = 0;
|
---|
1155 |
|
---|
1156 | RayInfoContainer::const_iterator ri, ri_end = rays.end();
|
---|
1157 |
|
---|
1158 | // set all kd nodes / objects as belonging to the front pvs
|
---|
1159 | for (ri = rays.begin(); ri != ri_end; ++ ri)
|
---|
1160 | {
|
---|
1161 | VssRay *ray = (*ri).mRay;
|
---|
1162 |
|
---|
1163 | pvsSize += PrepareHeuristics(*ray, true);
|
---|
1164 | pvsSize += PrepareHeuristics(*ray, false);
|
---|
1165 | }
|
---|
1166 |
|
---|
1167 | return pvsSize;
|
---|
1168 | }
|
---|
1169 |
|
---|
1170 |
|
---|
1171 | int VspTree::EvalMaxEventContribution(KdLeaf *leaf) const
|
---|
1172 | {
|
---|
1173 | int pvs = 0;
|
---|
1174 |
|
---|
1175 | // leaf falls out of right pvs
|
---|
1176 | if (-- leaf->mCounter == 0)
|
---|
1177 | {
|
---|
1178 | pvs -= ((int)leaf->mObjects.size() - (int)leaf->mMultipleObjects.size());
|
---|
1179 | }
|
---|
1180 |
|
---|
1181 | //-- separately handle objects which are in several kd leaves
|
---|
1182 |
|
---|
1183 | ObjectContainer::const_iterator oit, oit_end = leaf->mMultipleObjects.end();
|
---|
1184 |
|
---|
1185 | for (oit = leaf->mMultipleObjects.begin(); oit != oit_end; ++ oit)
|
---|
1186 | {
|
---|
1187 | Intersectable *object = *oit;
|
---|
1188 |
|
---|
1189 | if (-- object->mCounter == 0)
|
---|
1190 | {
|
---|
1191 | ++ pvs;
|
---|
1192 | }
|
---|
1193 | }
|
---|
1194 |
|
---|
1195 | return pvs;
|
---|
1196 | }
|
---|
1197 |
|
---|
1198 |
|
---|
1199 | int VspTree::EvalMinEventContribution(KdLeaf *leaf) const
|
---|
1200 | {
|
---|
1201 | if (leaf->Mailed())
|
---|
1202 | return 0;
|
---|
1203 |
|
---|
1204 | leaf->Mail();
|
---|
1205 |
|
---|
1206 | // add objects without those which are part of several kd leaves
|
---|
1207 | int pvs = ((int)leaf->mObjects.size() - (int)leaf->mMultipleObjects.size());
|
---|
1208 |
|
---|
1209 | // separately handle objects which are part of several kd leaves
|
---|
1210 | ObjectContainer::const_iterator oit, oit_end = leaf->mMultipleObjects.end();
|
---|
1211 |
|
---|
1212 | for (oit = leaf->mMultipleObjects.begin(); oit != oit_end; ++ oit)
|
---|
1213 | {
|
---|
1214 | Intersectable *object = *oit;
|
---|
1215 |
|
---|
1216 | // object not previously in pvs
|
---|
1217 | if (!object->Mailed())
|
---|
1218 | {
|
---|
1219 | object->Mail();
|
---|
1220 | ++ pvs;
|
---|
1221 | }
|
---|
1222 | }
|
---|
1223 |
|
---|
1224 | return pvs;
|
---|
1225 | }
|
---|
1226 |
|
---|
1227 |
|
---|
1228 | int VspTree::EvalMinEventContribution(const VssRay &ray,
|
---|
1229 | const bool isTermination) const
|
---|
1230 | {
|
---|
1231 | Intersectable *obj;
|
---|
1232 | Vector3 pt;
|
---|
1233 | KdNode *node;
|
---|
1234 |
|
---|
1235 | ray.GetSampleData(isTermination, pt, &obj, &node);
|
---|
1236 |
|
---|
1237 | if (!obj) return 0;
|
---|
1238 |
|
---|
1239 | int pvs = 0;
|
---|
1240 |
|
---|
1241 | switch (mHierarchyManager->GetObjectSpaceSubdivisonType())
|
---|
1242 | {
|
---|
1243 | case HierarchyManager::NO_OBJ_SUBDIV:
|
---|
1244 | {
|
---|
1245 | if (!obj->Mailed())
|
---|
1246 | {
|
---|
1247 | obj->Mail();
|
---|
1248 | ++ pvs;
|
---|
1249 | }
|
---|
1250 |
|
---|
1251 | break;
|
---|
1252 | }
|
---|
1253 | case HierarchyManager::KD_BASED_OBJ_SUBDIV:
|
---|
1254 | {
|
---|
1255 | KdLeaf *leaf = mHierarchyManager->mOspTree->GetLeaf(pt, node);
|
---|
1256 | // add contributions of the kd nodes
|
---|
1257 | pvs += EvalMinEventContribution(leaf);
|
---|
1258 |
|
---|
1259 | break;
|
---|
1260 | }
|
---|
1261 | case HierarchyManager::BV_BASED_OBJ_SUBDIV:
|
---|
1262 | {
|
---|
1263 | BvhLeaf *leaf = mHierarchyManager->mBvHierarchy->GetLeaf(obj);
|
---|
1264 |
|
---|
1265 | if (!leaf->Mailed())
|
---|
1266 | {
|
---|
1267 | leaf->Mail();
|
---|
1268 | ++ pvs;
|
---|
1269 | }
|
---|
1270 | break;
|
---|
1271 | }
|
---|
1272 | default:
|
---|
1273 | break;
|
---|
1274 | }
|
---|
1275 | return pvs;
|
---|
1276 | }
|
---|
1277 |
|
---|
1278 |
|
---|
1279 | int VspTree::EvalMaxEventContribution(const VssRay &ray,
|
---|
1280 | const bool isTermination) const
|
---|
1281 | {
|
---|
1282 | Intersectable *obj;
|
---|
1283 | Vector3 pt;
|
---|
1284 | KdNode *node;
|
---|
1285 |
|
---|
1286 | ray.GetSampleData(isTermination, pt, &obj, &node);
|
---|
1287 |
|
---|
1288 | if (!obj) return 0;
|
---|
1289 |
|
---|
1290 | int pvs = 0;
|
---|
1291 |
|
---|
1292 | switch (mHierarchyManager->GetObjectSpaceSubdivisonType())
|
---|
1293 | {
|
---|
1294 | case HierarchyManager::NO_OBJ_SUBDIV:
|
---|
1295 | {
|
---|
1296 | if (-- obj->mCounter == 0)
|
---|
1297 | ++ pvs;
|
---|
1298 | break;
|
---|
1299 | }
|
---|
1300 | case HierarchyManager::KD_BASED_OBJ_SUBDIV:
|
---|
1301 | {
|
---|
1302 | KdLeaf *leaf = mHierarchyManager->mOspTree->GetLeaf(pt, node);
|
---|
1303 |
|
---|
1304 | // add contributions of the kd nodes
|
---|
1305 | pvs += EvalMaxEventContribution(leaf);
|
---|
1306 | break;
|
---|
1307 | }
|
---|
1308 | case HierarchyManager::BV_BASED_OBJ_SUBDIV:
|
---|
1309 | {
|
---|
1310 | BvhLeaf *leaf = mHierarchyManager->mBvHierarchy->GetLeaf(obj);
|
---|
1311 |
|
---|
1312 | if (-- leaf->mCounter == 0)
|
---|
1313 | ++ pvs;
|
---|
1314 | break;
|
---|
1315 | }
|
---|
1316 | default:
|
---|
1317 | break;
|
---|
1318 | }
|
---|
1319 |
|
---|
1320 | return pvs;
|
---|
1321 | }
|
---|
1322 |
|
---|
1323 |
|
---|
1324 | void VspTree::EvalHeuristicsContribution(const SortableEntry &ci,
|
---|
1325 | int &pvsLeft,
|
---|
1326 | int &pvsRight) const
|
---|
1327 | {
|
---|
1328 | VssRay *ray = ci.ray;
|
---|
1329 |
|
---|
1330 | if (ci.type == SortableEntry::ERayMin)
|
---|
1331 | {
|
---|
1332 | pvsLeft += EvalMinEventContribution(*ray, true);
|
---|
1333 | pvsLeft += EvalMinEventContribution(*ray, false);
|
---|
1334 | }
|
---|
1335 | else
|
---|
1336 | {
|
---|
1337 | pvsRight -= EvalMaxEventContribution(*ray, true);
|
---|
1338 | pvsRight -= EvalMaxEventContribution(*ray, false);
|
---|
1339 | }
|
---|
1340 | }
|
---|
1341 |
|
---|
1342 |
|
---|
1343 | float VspTree::EvalLocalCostHeuristics(const VspTraversalData &tData,
|
---|
1344 | const AxisAlignedBox3 &box,
|
---|
1345 | const int axis,
|
---|
1346 | float &position)
|
---|
1347 | {
|
---|
1348 | // get subset of rays
|
---|
1349 | RayInfoContainer usedRays;
|
---|
1350 |
|
---|
1351 | if (mMaxTests < (int)tData.mRays->size())
|
---|
1352 | {
|
---|
1353 | GetRayInfoSets(*tData.mRays, mMaxTests, usedRays);
|
---|
1354 | }
|
---|
1355 | else
|
---|
1356 | {
|
---|
1357 | usedRays = *tData.mRays;
|
---|
1358 | }
|
---|
1359 |
|
---|
1360 | int pvsSize = tData.mPvs;
|
---|
1361 |
|
---|
1362 | const float minBox = box.Min(axis);
|
---|
1363 | const float maxBox = box.Max(axis);
|
---|
1364 |
|
---|
1365 | const float sizeBox = maxBox - minBox;
|
---|
1366 |
|
---|
1367 | const float minBand = minBox + mMinBand * sizeBox;
|
---|
1368 | const float maxBand = minBox + mMaxBand * sizeBox;
|
---|
1369 |
|
---|
1370 | SortSubdivisionCandidates(usedRays, axis, minBand, maxBand);
|
---|
1371 |
|
---|
1372 | // prepare the sweep
|
---|
1373 | // (note: returns pvs size, so there would be no need
|
---|
1374 | // to give pvs size as argument)
|
---|
1375 | pvsSize = PrepareHeuristics(usedRays);
|
---|
1376 |
|
---|
1377 | // go through the lists, count the number of objects left and right
|
---|
1378 | // and evaluate the following cost funcion:
|
---|
1379 | // C = ct_div_ci + (ql*rl + qr*rr)/queries
|
---|
1380 |
|
---|
1381 | int pvsl = 0;
|
---|
1382 | int pvsr = pvsSize;
|
---|
1383 |
|
---|
1384 | int pvsBack = pvsl;
|
---|
1385 | int pvsFront = pvsr;
|
---|
1386 |
|
---|
1387 | float sum = (float)pvsSize * sizeBox;
|
---|
1388 | float minSum = 1e20f;
|
---|
1389 |
|
---|
1390 |
|
---|
1391 | // if no good split can be found, take mid split
|
---|
1392 | position = minBox + 0.5f * sizeBox;
|
---|
1393 |
|
---|
1394 | // the relative cost ratio
|
---|
1395 | float ratio = 99999999.0f;
|
---|
1396 | bool splitPlaneFound = false;
|
---|
1397 |
|
---|
1398 | Intersectable::NewMail();
|
---|
1399 | KdLeaf::NewMail();
|
---|
1400 |
|
---|
1401 |
|
---|
1402 | //-- traverse through visibility events
|
---|
1403 |
|
---|
1404 | vector<SortableEntry>::const_iterator ci, ci_end = mLocalSubdivisionCandidates->end();
|
---|
1405 |
|
---|
1406 | for (ci = mLocalSubdivisionCandidates->begin(); ci != ci_end; ++ ci)
|
---|
1407 | {
|
---|
1408 | EvalHeuristicsContribution(*ci, pvsl, pvsr);
|
---|
1409 |
|
---|
1410 | // Note: sufficient to compare size of bounding boxes of front and back side?
|
---|
1411 | if (((*ci).value >= minBand) && ((*ci).value <= maxBand))
|
---|
1412 | {
|
---|
1413 |
|
---|
1414 | float currentPos;
|
---|
1415 |
|
---|
1416 | // HACK: current positition is BETWEEN visibility events
|
---|
1417 | if (0 && ((ci + 1) != ci_end))
|
---|
1418 | currentPos = ((*ci).value + (*(ci + 1)).value) * 0.5f;
|
---|
1419 | else
|
---|
1420 | currentPos = (*ci).value;
|
---|
1421 |
|
---|
1422 | sum = pvsl * ((*ci).value - minBox) + pvsr * (maxBox - (*ci).value);
|
---|
1423 | //Debug << "pos=" << (*ci).value << "\t newpos=" << currentPos << "\t pvs=(" << pvsl << "," << pvsr << ")" << "\t cost= " << sum << endl;
|
---|
1424 |
|
---|
1425 | if (sum < minSum)
|
---|
1426 | {
|
---|
1427 | splitPlaneFound = true;
|
---|
1428 |
|
---|
1429 | minSum = sum;
|
---|
1430 | position = currentPos;
|
---|
1431 |
|
---|
1432 | pvsBack = pvsl;
|
---|
1433 | pvsFront = pvsr;
|
---|
1434 | }
|
---|
1435 | }
|
---|
1436 | }
|
---|
1437 |
|
---|
1438 |
|
---|
1439 | //-- compute cost
|
---|
1440 |
|
---|
1441 | const int lowerPvsLimit = mViewCellsManager->GetMinPvsSize();
|
---|
1442 | const int upperPvsLimit = mViewCellsManager->GetMaxPvsSize();
|
---|
1443 |
|
---|
1444 | const float pOverall = sizeBox;
|
---|
1445 | const float pBack = position - minBox;
|
---|
1446 | const float pFront = maxBox - position;
|
---|
1447 |
|
---|
1448 | const float penaltyOld = EvalPvsPenalty(pvsSize, lowerPvsLimit, upperPvsLimit);
|
---|
1449 | const float penaltyFront = EvalPvsPenalty(pvsFront, lowerPvsLimit, upperPvsLimit);
|
---|
1450 | const float penaltyBack = EvalPvsPenalty(pvsBack, lowerPvsLimit, upperPvsLimit);
|
---|
1451 |
|
---|
1452 | const float oldRenderCost = penaltyOld * pOverall + Limits::Small;
|
---|
1453 | const float newRenderCost = penaltyFront * pFront + penaltyBack * pBack;
|
---|
1454 |
|
---|
1455 | if (splitPlaneFound)
|
---|
1456 | {
|
---|
1457 | ratio = newRenderCost / oldRenderCost;
|
---|
1458 | }
|
---|
1459 |
|
---|
1460 | const float volRatio = tData.mBoundingBox.GetVolume() / (sizeBox * mBoundingBox.GetVolume());
|
---|
1461 |
|
---|
1462 | /*
|
---|
1463 | //if (axis != 1)
|
---|
1464 | //Debug << "axis=" << axis << " costRatio=" << ratio << " pos=" << position << " t=" << (position - minBox) / (maxBox - minBox)
|
---|
1465 | // <<"\t pb=(" << pvsBack << ")\t pf=(" << pvsFront << ")" << endl;
|
---|
1466 |
|
---|
1467 | Debug << "\n§§§§ eval local cost §§§§" << endl
|
---|
1468 | << "back pvs: " << penaltyBack << " front pvs: " << penaltyFront << " total pvs: " << penaltyOld << endl
|
---|
1469 | << "back p: " << pBack * volRatio << " front p " << pFront * volRatio << " p: " << pOverall * volRatio << endl
|
---|
1470 | << "old rc: " << oldRenderCost * volRatio << " new rc: " << newRenderCost * volRatio << endl
|
---|
1471 | << "render cost decrease: " << oldRenderCost * volRatio - newRenderCost * volRatio << endl;
|
---|
1472 | */
|
---|
1473 | return ratio;
|
---|
1474 | }
|
---|
1475 |
|
---|
1476 |
|
---|
1477 | float VspTree::SelectSplitPlane(const VspTraversalData &tData,
|
---|
1478 | AxisAlignedPlane &plane,
|
---|
1479 | float &pFront,
|
---|
1480 | float &pBack)
|
---|
1481 | {
|
---|
1482 | float nPosition[3];
|
---|
1483 | float nCostRatio[3];
|
---|
1484 | float nProbFront[3];
|
---|
1485 | float nProbBack[3];
|
---|
1486 |
|
---|
1487 | // create bounding box of node geometry
|
---|
1488 | AxisAlignedBox3 box = tData.mBoundingBox;
|
---|
1489 |
|
---|
1490 | int sAxis = 0;
|
---|
1491 | int bestAxis = -1;
|
---|
1492 |
|
---|
1493 | // if we use some kind of specialised fixed axis
|
---|
1494 | const bool useSpecialAxis =
|
---|
1495 | mOnlyDrivingAxis || mCirculatingAxis;
|
---|
1496 | //Debug << "data: " << tData.mBoundingBox << " pvs " << tData.mPvs << endl;
|
---|
1497 | if (mCirculatingAxis)
|
---|
1498 | {
|
---|
1499 | int parentAxis = 0;
|
---|
1500 | VspNode *parent = tData.mNode->GetParent();
|
---|
1501 |
|
---|
1502 | if (parent)
|
---|
1503 | parentAxis = dynamic_cast<VspInterior *>(parent)->GetAxis();
|
---|
1504 |
|
---|
1505 | sAxis = (parentAxis + 1) % 3;
|
---|
1506 | }
|
---|
1507 | else if (mOnlyDrivingAxis)
|
---|
1508 | {
|
---|
1509 | sAxis = box.Size().DrivingAxis();
|
---|
1510 | }
|
---|
1511 |
|
---|
1512 | for (int axis = 0; axis < 3; ++ axis)
|
---|
1513 | {
|
---|
1514 | if (!useSpecialAxis || (axis == sAxis))
|
---|
1515 | {
|
---|
1516 | if (mUseCostHeuristics)
|
---|
1517 | {
|
---|
1518 | //-- place split plane using heuristics
|
---|
1519 | nCostRatio[axis] =
|
---|
1520 | EvalLocalCostHeuristics(tData,
|
---|
1521 | box,
|
---|
1522 | axis,
|
---|
1523 | nPosition[axis]);
|
---|
1524 | }
|
---|
1525 | else
|
---|
1526 | {
|
---|
1527 | //-- split plane position is spatial median
|
---|
1528 | nPosition[axis] = (box.Min()[axis] + box.Max()[axis]) * 0.5f;
|
---|
1529 | nCostRatio[axis] = EvalLocalSplitCost(tData,
|
---|
1530 | box,
|
---|
1531 | axis,
|
---|
1532 | nPosition[axis],
|
---|
1533 | nProbFront[axis],
|
---|
1534 | nProbBack[axis]);
|
---|
1535 | }
|
---|
1536 |
|
---|
1537 | if (bestAxis == -1)
|
---|
1538 | {
|
---|
1539 | bestAxis = axis;
|
---|
1540 | }
|
---|
1541 | else if (nCostRatio[axis] < nCostRatio[bestAxis])
|
---|
1542 | {
|
---|
1543 | bestAxis = axis;
|
---|
1544 | }
|
---|
1545 | }
|
---|
1546 | }
|
---|
1547 |
|
---|
1548 |
|
---|
1549 | //-- assign values of best split
|
---|
1550 |
|
---|
1551 | plane.mAxis = bestAxis;
|
---|
1552 | plane.mPosition = nPosition[bestAxis]; // split plane position
|
---|
1553 |
|
---|
1554 | pFront = nProbFront[bestAxis];
|
---|
1555 | pBack = nProbBack[bestAxis];
|
---|
1556 |
|
---|
1557 | //Debug << "val: " << nCostRatio[bestAxis] << " axis: " << bestAxis << endl;
|
---|
1558 | return nCostRatio[bestAxis];
|
---|
1559 | }
|
---|
1560 |
|
---|
1561 |
|
---|
1562 | float VspTree::EvalRenderCostDecrease(const AxisAlignedPlane &candidatePlane,
|
---|
1563 | const VspTraversalData &data,
|
---|
1564 | float &normalizedOldRenderCost) const
|
---|
1565 | {
|
---|
1566 | float pvsFront = 0;
|
---|
1567 | float pvsBack = 0;
|
---|
1568 | float totalPvs = 0;
|
---|
1569 |
|
---|
1570 | // probability that view point lies in back / front node
|
---|
1571 | float pOverall = data.mProbability;
|
---|
1572 | float pFront = 0;
|
---|
1573 | float pBack = 0;
|
---|
1574 |
|
---|
1575 | const float viewSpaceVol = mBoundingBox.GetVolume();
|
---|
1576 |
|
---|
1577 | // create unique ids for pvs heuristics
|
---|
1578 | Intersectable::NewMail(3);
|
---|
1579 | KdLeaf::NewMail(3);
|
---|
1580 |
|
---|
1581 | RayInfoContainer::const_iterator rit, rit_end = data.mRays->end();
|
---|
1582 |
|
---|
1583 | for (rit = data.mRays->begin(); rit != rit_end; ++ rit)
|
---|
1584 | {
|
---|
1585 | RayInfo rayInf = *rit;
|
---|
1586 |
|
---|
1587 | float t;
|
---|
1588 | VssRay *ray = rayInf.mRay;
|
---|
1589 |
|
---|
1590 | const int cf =
|
---|
1591 | rayInf.ComputeRayIntersection(candidatePlane.mAxis,
|
---|
1592 | candidatePlane.mPosition, t);
|
---|
1593 | /*
|
---|
1594 | if (!mUseKdPvsForHeuristics)
|
---|
1595 | {
|
---|
1596 | // find front and back pvs for origing and termination object
|
---|
1597 | UpdateObjPvsContri(ray->mTerminationObject, cf, pvsFront, pvsBack, totalPvs);
|
---|
1598 | UpdateObjPvsContri(ray->mOriginObject, cf, pvsFront, pvsBack, totalPvs);
|
---|
1599 | }
|
---|
1600 | else
|
---|
1601 | {
|
---|
1602 | if (ray->mTerminationObject)
|
---|
1603 | {
|
---|
1604 | KdLeaf *leaf = mHierarchyManager->mOspTree->GetLeaf(ray->mTermination, ray->mTerminationNode);
|
---|
1605 | UpdateKdLeafPvsContri(leaf, cf, pvsFront, pvsBack, totalPvs);
|
---|
1606 | }
|
---|
1607 |
|
---|
1608 | if (ray->mOriginObject)
|
---|
1609 | {
|
---|
1610 | KdLeaf *leaf = mHierarchyManager->mOspTree->GetLeaf(ray->mOrigin, ray->mOriginNode);
|
---|
1611 | UpdateKdLeafPvsContri(leaf, cf, pvsFront, pvsBack, totalPvs);
|
---|
1612 | }
|
---|
1613 | }
|
---|
1614 | */
|
---|
1615 | }
|
---|
1616 |
|
---|
1617 |
|
---|
1618 | AxisAlignedBox3 frontBox;
|
---|
1619 | AxisAlignedBox3 backBox;
|
---|
1620 |
|
---|
1621 | data.mBoundingBox.Split(candidatePlane.mAxis, candidatePlane.mPosition, frontBox, backBox);
|
---|
1622 |
|
---|
1623 | pFront = frontBox.GetVolume();
|
---|
1624 | pBack = pOverall - pFront;
|
---|
1625 |
|
---|
1626 |
|
---|
1627 | //-- pvs rendering heuristics
|
---|
1628 | const int lowerPvsLimit = mViewCellsManager->GetMinPvsSize();
|
---|
1629 | const int upperPvsLimit = mViewCellsManager->GetMaxPvsSize();
|
---|
1630 |
|
---|
1631 | //-- only render cost heuristics or combined with standard deviation
|
---|
1632 | const float penaltyOld = EvalPvsPenalty((int)totalPvs, lowerPvsLimit, upperPvsLimit);
|
---|
1633 | const float penaltyFront = EvalPvsPenalty((int)pvsFront, lowerPvsLimit, upperPvsLimit);
|
---|
1634 | const float penaltyBack = EvalPvsPenalty((int)pvsBack, lowerPvsLimit, upperPvsLimit);
|
---|
1635 |
|
---|
1636 | const float oldRenderCost = pOverall * penaltyOld;
|
---|
1637 | const float newRenderCost = penaltyFront * pFront + penaltyBack * pBack;
|
---|
1638 |
|
---|
1639 | normalizedOldRenderCost = oldRenderCost / viewSpaceVol;
|
---|
1640 |
|
---|
1641 | const float renderCostDecrease = (oldRenderCost - newRenderCost) / viewSpaceVol;
|
---|
1642 | /*
|
---|
1643 | Debug << "\n==== eval render cost decrease ===" << endl
|
---|
1644 | << "back pvs: " << pvsBack << " front pvs " << pvsFront << " total pvs: " << totalPvs << endl
|
---|
1645 | << "back p: " << pBack / viewSpaceVol << " front p " << pFront / viewSpaceVol << " p: " << pOverall / viewSpaceVol << endl
|
---|
1646 | << "old rc: " << normalizedOldRenderCost << " new rc: " << newRenderCost / viewSpaceVol << endl
|
---|
1647 | << "render cost decrease: " << renderCostDecrease << endl;
|
---|
1648 | */
|
---|
1649 | return renderCostDecrease;
|
---|
1650 | }
|
---|
1651 |
|
---|
1652 |
|
---|
1653 | float VspTree::EvalLocalSplitCost(const VspTraversalData &data,
|
---|
1654 | const AxisAlignedBox3 &box,
|
---|
1655 | const int axis,
|
---|
1656 | const float &position,
|
---|
1657 | float &pFront,
|
---|
1658 | float &pBack) const
|
---|
1659 | {
|
---|
1660 | float pvsTotal = 0;
|
---|
1661 | float pvsFront = 0;
|
---|
1662 | float pvsBack = 0;
|
---|
1663 |
|
---|
1664 | // create unique ids for pvs heuristics
|
---|
1665 | Intersectable::NewMail(3);
|
---|
1666 |
|
---|
1667 | const int pvsSize = data.mPvs;
|
---|
1668 |
|
---|
1669 | RayInfoContainer::const_iterator rit, rit_end = data.mRays->end();
|
---|
1670 |
|
---|
1671 | // this is the main ray classification loop!
|
---|
1672 | for(rit = data.mRays->begin(); rit != rit_end; ++ rit)
|
---|
1673 | {
|
---|
1674 | // determine the side of this ray with respect to the plane
|
---|
1675 | float t;
|
---|
1676 | const int side = (*rit).ComputeRayIntersection(axis, position, t);
|
---|
1677 |
|
---|
1678 | UpdateObjPvsContri((*rit).mRay->mTerminationObject, side, pvsFront, pvsBack, pvsTotal);
|
---|
1679 | UpdateObjPvsContri((*rit).mRay->mOriginObject, side, pvsFront, pvsBack, pvsTotal);
|
---|
1680 | }
|
---|
1681 |
|
---|
1682 | //-- evaluate cost heuristics
|
---|
1683 |
|
---|
1684 | float pOverall;
|
---|
1685 |
|
---|
1686 | pOverall = data.mProbability;
|
---|
1687 |
|
---|
1688 | // we use spatial mid split => simplified computation
|
---|
1689 | pBack = pFront = pOverall * 0.5f;
|
---|
1690 |
|
---|
1691 | const float newCost = pvsBack * pBack + pvsFront * pFront;
|
---|
1692 | const float oldCost = (float)pvsSize * pOverall + Limits::Small;
|
---|
1693 |
|
---|
1694 | #ifdef _DEBUG
|
---|
1695 | Debug << axis << " " << pvsSize << " " << pvsBack << " " << pvsFront << endl;
|
---|
1696 | Debug << pFront << " " << pBack << " " << pOverall << endl;
|
---|
1697 | #endif
|
---|
1698 |
|
---|
1699 | return (mCtDivCi + newCost) / oldCost;
|
---|
1700 | }
|
---|
1701 |
|
---|
1702 |
|
---|
1703 | void VspTree::UpdateObjPvsContri(Intersectable *obj,
|
---|
1704 | const int cf,
|
---|
1705 | float &frontPvs,
|
---|
1706 | float &backPvs,
|
---|
1707 | float &totalPvs) const
|
---|
1708 | {
|
---|
1709 | if (!obj) return;
|
---|
1710 |
|
---|
1711 | //const float renderCost = mViewCellsManager->SimpleRay &raynderCost(obj);
|
---|
1712 | const int renderCost = 1;
|
---|
1713 |
|
---|
1714 | // object in no pvs => new
|
---|
1715 | if (!obj->Mailed() && !obj->Mailed(1) && !obj->Mailed(2))
|
---|
1716 | {
|
---|
1717 | totalPvs += renderCost;
|
---|
1718 | }
|
---|
1719 |
|
---|
1720 | // QUESTION matt: is it safe to assume that
|
---|
1721 | // the object belongs to no pvs in this case?
|
---|
1722 | //if (cf == Ray::COINCIDENT) return;
|
---|
1723 |
|
---|
1724 | if (cf >= 0) // front pvs
|
---|
1725 | {
|
---|
1726 | if (!obj->Mailed() && !obj->Mailed(2))
|
---|
1727 | {
|
---|
1728 | frontPvs += renderCost;
|
---|
1729 |
|
---|
1730 | // already in back pvs => in both pvss
|
---|
1731 | if (obj->Mailed(1))
|
---|
1732 | obj->Mail(2);
|
---|
1733 | else
|
---|
1734 | obj->Mail();
|
---|
1735 | }
|
---|
1736 | }
|
---|
1737 |
|
---|
1738 | if (cf <= 0) // back pvs
|
---|
1739 | {
|
---|
1740 | if (!obj->Mailed(1) && !obj->Mailed(2))
|
---|
1741 | {
|
---|
1742 | backPvs += renderCost;
|
---|
1743 |
|
---|
1744 | // already in front pvs => in both pvss
|
---|
1745 | if (obj->Mailed())
|
---|
1746 | obj->Mail(2);
|
---|
1747 | else
|
---|
1748 | obj->Mail(1);
|
---|
1749 | }
|
---|
1750 | }
|
---|
1751 | }
|
---|
1752 |
|
---|
1753 |
|
---|
1754 | void VspTree::UpdateKdLeafPvsContri(KdLeaf *leaf,
|
---|
1755 | const int cf,
|
---|
1756 | float &frontPvs,
|
---|
1757 | float &backPvs,
|
---|
1758 | float &totalPvs) const
|
---|
1759 | {
|
---|
1760 | if (!leaf) return;
|
---|
1761 |
|
---|
1762 | // the objects which are referenced in this and only this leaf
|
---|
1763 | const int contri = (int)(leaf->mObjects.size() - leaf->mMultipleObjects.size());
|
---|
1764 |
|
---|
1765 | // newly found leaf
|
---|
1766 | if (!leaf->Mailed() && !leaf->Mailed(1) && !leaf->Mailed(2))
|
---|
1767 | {
|
---|
1768 | totalPvs += contri;
|
---|
1769 | }
|
---|
1770 |
|
---|
1771 | // compute contribution of yet unclassified objects
|
---|
1772 | ObjectContainer::const_iterator oit, oit_end = leaf->mMultipleObjects.end();
|
---|
1773 |
|
---|
1774 | for (oit = leaf->mMultipleObjects.begin(); oit != oit_end; ++ oit)
|
---|
1775 | {
|
---|
1776 | UpdateObjPvsContri(*oit, cf, frontPvs, backPvs, totalPvs);
|
---|
1777 | }
|
---|
1778 |
|
---|
1779 | // QUESTION matt: is it safe to assume that
|
---|
1780 | // the object belongs to no pvs in this case?
|
---|
1781 | //if (cf == Ray::COINCIDENT) return;
|
---|
1782 |
|
---|
1783 | if (cf >= 0) // front pvs
|
---|
1784 | {
|
---|
1785 | if (!leaf->Mailed() && !leaf->Mailed(2))
|
---|
1786 | {
|
---|
1787 | frontPvs += contri;
|
---|
1788 |
|
---|
1789 | // already in back pvs => in both pvss
|
---|
1790 | if (leaf->Mailed(1))
|
---|
1791 | leaf->Mail(2);
|
---|
1792 | else
|
---|
1793 | leaf->Mail();
|
---|
1794 | }
|
---|
1795 | }
|
---|
1796 |
|
---|
1797 | if (cf <= 0) // back pvs
|
---|
1798 | {
|
---|
1799 | if (!leaf->Mailed(1) && !leaf->Mailed(2))
|
---|
1800 | {
|
---|
1801 | backPvs += contri;
|
---|
1802 |
|
---|
1803 | // already in front pvs => in both pvss
|
---|
1804 | if (leaf->Mailed())
|
---|
1805 | leaf->Mail(2);
|
---|
1806 | else
|
---|
1807 | leaf->Mail(1);
|
---|
1808 | }
|
---|
1809 | }
|
---|
1810 | }
|
---|
1811 |
|
---|
1812 |
|
---|
1813 | void VspTree::CollectLeaves(vector<VspLeaf *> &leaves,
|
---|
1814 | const bool onlyUnmailed,
|
---|
1815 | const int maxPvsSize) const
|
---|
1816 | {
|
---|
1817 | stack<VspNode *> nodeStack;
|
---|
1818 | nodeStack.push(mRoot);
|
---|
1819 |
|
---|
1820 | while (!nodeStack.empty())
|
---|
1821 | {
|
---|
1822 | VspNode *node = nodeStack.top();
|
---|
1823 | nodeStack.pop();
|
---|
1824 |
|
---|
1825 | if (node->IsLeaf())
|
---|
1826 | {
|
---|
1827 | // test if this leaf is in valid view space
|
---|
1828 | VspLeaf *leaf = dynamic_cast<VspLeaf *>(node);
|
---|
1829 | if (leaf->TreeValid() &&
|
---|
1830 | (!onlyUnmailed || !leaf->Mailed()) &&
|
---|
1831 | ((maxPvsSize < 0) || (leaf->GetViewCell()->GetPvs().CountObjectsInPvs() <= maxPvsSize)))
|
---|
1832 | {
|
---|
1833 | leaves.push_back(leaf);
|
---|
1834 | }
|
---|
1835 | }
|
---|
1836 | else
|
---|
1837 | {
|
---|
1838 | VspInterior *interior = dynamic_cast<VspInterior *>(node);
|
---|
1839 |
|
---|
1840 | nodeStack.push(interior->GetBack());
|
---|
1841 | nodeStack.push(interior->GetFront());
|
---|
1842 | }
|
---|
1843 | }
|
---|
1844 | }
|
---|
1845 |
|
---|
1846 |
|
---|
1847 | AxisAlignedBox3 VspTree::GetBoundingBox() const
|
---|
1848 | {
|
---|
1849 | return mBoundingBox;
|
---|
1850 | }
|
---|
1851 |
|
---|
1852 |
|
---|
1853 | VspNode *VspTree::GetRoot() const
|
---|
1854 | {
|
---|
1855 | return mRoot;
|
---|
1856 | }
|
---|
1857 |
|
---|
1858 |
|
---|
1859 | void VspTree::EvaluateLeafStats(const VspTraversalData &data)
|
---|
1860 | {
|
---|
1861 | // the node became a leaf -> evaluate stats for leafs
|
---|
1862 | VspLeaf *leaf = dynamic_cast<VspLeaf *>(data.mNode);
|
---|
1863 |
|
---|
1864 |
|
---|
1865 | if (data.mPvs > mVspStats.maxPvs)
|
---|
1866 | {
|
---|
1867 | mVspStats.maxPvs = data.mPvs;
|
---|
1868 | }
|
---|
1869 |
|
---|
1870 | mVspStats.pvs += data.mPvs;
|
---|
1871 |
|
---|
1872 | if (data.mDepth < mVspStats.minDepth)
|
---|
1873 | {
|
---|
1874 | mVspStats.minDepth = data.mDepth;
|
---|
1875 | }
|
---|
1876 |
|
---|
1877 | if (data.mDepth >= mTermMaxDepth)
|
---|
1878 | {
|
---|
1879 | ++ mVspStats.maxDepthNodes;
|
---|
1880 | //Debug << "new max depth: " << mVspStats.maxDepthNodes << endl;
|
---|
1881 | }
|
---|
1882 |
|
---|
1883 | // accumulate rays to compute rays / leaf
|
---|
1884 | mVspStats.accumRays += (int)data.mRays->size();
|
---|
1885 |
|
---|
1886 | if (data.mPvs < mTermMinPvs)
|
---|
1887 | ++ mVspStats.minPvsNodes;
|
---|
1888 |
|
---|
1889 | if ((int)data.mRays->size() < mTermMinRays)
|
---|
1890 | ++ mVspStats.minRaysNodes;
|
---|
1891 |
|
---|
1892 | if (data.GetAvgRayContribution() > mTermMaxRayContribution)
|
---|
1893 | ++ mVspStats.maxRayContribNodes;
|
---|
1894 |
|
---|
1895 | if (data.mProbability <= mTermMinProbability)
|
---|
1896 | ++ mVspStats.minProbabilityNodes;
|
---|
1897 |
|
---|
1898 | // accumulate depth to compute average depth
|
---|
1899 | mVspStats.accumDepth += data.mDepth;
|
---|
1900 |
|
---|
1901 | ++ mCreatedViewCells;
|
---|
1902 |
|
---|
1903 | #ifdef _DEBUG
|
---|
1904 | Debug << "BSP stats: "
|
---|
1905 | << "Depth: " << data.mDepth << " (max: " << mTermMaxDepth << "), "
|
---|
1906 | << "PVS: " << data.mPvs << " (min: " << mTermMinPvs << "), "
|
---|
1907 | << "#rays: " << (int)data.mRays->size() << " (max: " << mTermMinRays << "), "
|
---|
1908 | << "#pvs: " << leaf->GetViewCell()->GetPvs().CountObjectsInPvs() << "), "
|
---|
1909 | << "#avg ray contrib (pvs): " << (float)data.mPvs / (float)data.mRays->size() << endl;
|
---|
1910 | #endif
|
---|
1911 | }
|
---|
1912 |
|
---|
1913 |
|
---|
1914 | void VspTree::CollectViewCells(ViewCellContainer &viewCells, bool onlyValid) const
|
---|
1915 | {
|
---|
1916 | ViewCell::NewMail();
|
---|
1917 | CollectViewCells(mRoot, onlyValid, viewCells, true);
|
---|
1918 | }
|
---|
1919 |
|
---|
1920 |
|
---|
1921 | void VspTree::CollapseViewCells()
|
---|
1922 | {
|
---|
1923 | // TODO matt
|
---|
1924 | #if HAS_TO_BE_REDONE
|
---|
1925 | stack<VspNode *> nodeStack;
|
---|
1926 |
|
---|
1927 | if (!mRoot)
|
---|
1928 | return;
|
---|
1929 |
|
---|
1930 | nodeStack.push(mRoot);
|
---|
1931 |
|
---|
1932 | while (!nodeStack.empty())
|
---|
1933 | {
|
---|
1934 | VspNode *node = nodeStack.top();
|
---|
1935 | nodeStack.pop();
|
---|
1936 |
|
---|
1937 | if (node->IsLeaf())
|
---|
1938 | {
|
---|
1939 | BspViewCell *viewCell = dynamic_cast<VspLeaf *>(node)->GetViewCell();
|
---|
1940 |
|
---|
1941 | if (!viewCell->GetValid())
|
---|
1942 | {
|
---|
1943 | BspViewCell *viewCell = dynamic_cast<VspLeaf *>(node)->GetViewCell();
|
---|
1944 |
|
---|
1945 | ViewCellContainer leaves;
|
---|
1946 | mViewCellsTree->CollectLeaves(viewCell, leaves);
|
---|
1947 |
|
---|
1948 | ViewCellContainer::const_iterator it, it_end = leaves.end();
|
---|
1949 |
|
---|
1950 | for (it = leaves.begin(); it != it_end; ++ it)
|
---|
1951 | {
|
---|
1952 | VspLeaf *l = dynamic_cast<BspViewCell *>(*it)->mLeaf;
|
---|
1953 | l->SetViewCell(GetOrCreateOutOfBoundsCell());
|
---|
1954 | ++ mVspStats.invalidLeaves;
|
---|
1955 | }
|
---|
1956 |
|
---|
1957 | // add to unbounded view cell
|
---|
1958 | GetOrCreateOutOfBoundsCell()->GetPvs().AddPvs(viewCell->GetPvs());
|
---|
1959 | DEL_PTR(viewCell);
|
---|
1960 | }
|
---|
1961 | }
|
---|
1962 | else
|
---|
1963 | {
|
---|
1964 | VspInterior *interior = dynamic_cast<VspInterior *>(node);
|
---|
1965 |
|
---|
1966 | nodeStack.push(interior->GetFront());
|
---|
1967 | nodeStack.push(interior->GetBack());
|
---|
1968 | }
|
---|
1969 | }
|
---|
1970 |
|
---|
1971 | Debug << "invalid leaves: " << mVspStats.invalidLeaves << endl;
|
---|
1972 | #endif
|
---|
1973 | }
|
---|
1974 |
|
---|
1975 |
|
---|
1976 | void VspTree::CollectRays(VssRayContainer &rays)
|
---|
1977 | {
|
---|
1978 | vector<VspLeaf *> leaves;
|
---|
1979 | CollectLeaves(leaves);
|
---|
1980 |
|
---|
1981 | vector<VspLeaf *>::const_iterator lit, lit_end = leaves.end();
|
---|
1982 |
|
---|
1983 | for (lit = leaves.begin(); lit != lit_end; ++ lit)
|
---|
1984 | {
|
---|
1985 | VspLeaf *leaf = *lit;
|
---|
1986 | VssRayContainer::const_iterator rit, rit_end = leaf->mVssRays.end();
|
---|
1987 |
|
---|
1988 | for (rit = leaf->mVssRays.begin(); rit != rit_end; ++ rit)
|
---|
1989 | rays.push_back(*rit);
|
---|
1990 | }
|
---|
1991 | }
|
---|
1992 |
|
---|
1993 |
|
---|
1994 | void VspTree::SetViewCellsManager(ViewCellsManager *vcm)
|
---|
1995 | {
|
---|
1996 | mViewCellsManager = vcm;
|
---|
1997 | }
|
---|
1998 |
|
---|
1999 |
|
---|
2000 | void VspTree::ValidateTree()
|
---|
2001 | {
|
---|
2002 | mVspStats.invalidLeaves = 0;
|
---|
2003 |
|
---|
2004 | stack<VspNode *> nodeStack;
|
---|
2005 |
|
---|
2006 | if (!mRoot)
|
---|
2007 | return;
|
---|
2008 |
|
---|
2009 | nodeStack.push(mRoot);
|
---|
2010 |
|
---|
2011 | while (!nodeStack.empty())
|
---|
2012 | {
|
---|
2013 | VspNode *node = nodeStack.top();
|
---|
2014 | nodeStack.pop();
|
---|
2015 |
|
---|
2016 | if (node->IsLeaf())
|
---|
2017 | {
|
---|
2018 | VspLeaf *leaf = dynamic_cast<VspLeaf *>(node);
|
---|
2019 |
|
---|
2020 | if (!leaf->GetViewCell()->GetValid())
|
---|
2021 | ++ mVspStats.invalidLeaves;
|
---|
2022 |
|
---|
2023 | // validity flags don't match => repair
|
---|
2024 | if (leaf->GetViewCell()->GetValid() != leaf->TreeValid())
|
---|
2025 | {
|
---|
2026 | leaf->SetTreeValid(leaf->GetViewCell()->GetValid());
|
---|
2027 | PropagateUpValidity(leaf);
|
---|
2028 | }
|
---|
2029 | }
|
---|
2030 | else
|
---|
2031 | {
|
---|
2032 | VspInterior *interior = dynamic_cast<VspInterior *>(node);
|
---|
2033 |
|
---|
2034 | nodeStack.push(interior->GetFront());
|
---|
2035 | nodeStack.push(interior->GetBack());
|
---|
2036 | }
|
---|
2037 | }
|
---|
2038 |
|
---|
2039 | Debug << "invalid leaves: " << mVspStats.invalidLeaves << endl;
|
---|
2040 | }
|
---|
2041 |
|
---|
2042 |
|
---|
2043 |
|
---|
2044 | void VspTree::CollectViewCells(VspNode *root,
|
---|
2045 | bool onlyValid,
|
---|
2046 | ViewCellContainer &viewCells,
|
---|
2047 | bool onlyUnmailed) const
|
---|
2048 | {
|
---|
2049 | stack<VspNode *> nodeStack;
|
---|
2050 |
|
---|
2051 | if (!root)
|
---|
2052 | return;
|
---|
2053 |
|
---|
2054 | nodeStack.push(root);
|
---|
2055 |
|
---|
2056 | while (!nodeStack.empty())
|
---|
2057 | {
|
---|
2058 | VspNode *node = nodeStack.top();
|
---|
2059 | nodeStack.pop();
|
---|
2060 |
|
---|
2061 | if (node->IsLeaf())
|
---|
2062 | {
|
---|
2063 | if (!onlyValid || node->TreeValid())
|
---|
2064 | {
|
---|
2065 | ViewCellLeaf *leafVc = dynamic_cast<VspLeaf *>(node)->GetViewCell();
|
---|
2066 |
|
---|
2067 | ViewCell *viewCell = mViewCellsTree->GetActiveViewCell(leafVc);
|
---|
2068 |
|
---|
2069 | if (!onlyUnmailed || !viewCell->Mailed())
|
---|
2070 | {
|
---|
2071 | viewCell->Mail();
|
---|
2072 | viewCells.push_back(viewCell);
|
---|
2073 | }
|
---|
2074 | }
|
---|
2075 | }
|
---|
2076 | else
|
---|
2077 | {
|
---|
2078 | VspInterior *interior = dynamic_cast<VspInterior *>(node);
|
---|
2079 |
|
---|
2080 | nodeStack.push(interior->GetFront());
|
---|
2081 | nodeStack.push(interior->GetBack());
|
---|
2082 | }
|
---|
2083 | }
|
---|
2084 | }
|
---|
2085 |
|
---|
2086 |
|
---|
2087 | int VspTree::FindNeighbors(VspLeaf *n,
|
---|
2088 | vector<VspLeaf *> &neighbors,
|
---|
2089 | const bool onlyUnmailed) const
|
---|
2090 | {
|
---|
2091 | stack<VspNode *> nodeStack;
|
---|
2092 | nodeStack.push(mRoot);
|
---|
2093 |
|
---|
2094 | const AxisAlignedBox3 box = GetBoundingBox(n);
|
---|
2095 |
|
---|
2096 | while (!nodeStack.empty())
|
---|
2097 | {
|
---|
2098 | VspNode *node = nodeStack.top();
|
---|
2099 | nodeStack.pop();
|
---|
2100 |
|
---|
2101 | if (node->IsLeaf())
|
---|
2102 | {
|
---|
2103 | VspLeaf *leaf = dynamic_cast<VspLeaf *>(node);
|
---|
2104 |
|
---|
2105 | if (leaf != n && (!onlyUnmailed || !leaf->Mailed()))
|
---|
2106 | neighbors.push_back(leaf);
|
---|
2107 | }
|
---|
2108 | else
|
---|
2109 | {
|
---|
2110 | VspInterior *interior = dynamic_cast<VspInterior *>(node);
|
---|
2111 |
|
---|
2112 | if (interior->GetPosition() > box.Max(interior->GetAxis()))
|
---|
2113 | nodeStack.push(interior->GetBack());
|
---|
2114 | else
|
---|
2115 | {
|
---|
2116 | if (interior->GetPosition() < box.Min(interior->GetAxis()))
|
---|
2117 | nodeStack.push(interior->GetFront());
|
---|
2118 | else
|
---|
2119 | {
|
---|
2120 | // random decision
|
---|
2121 | nodeStack.push(interior->GetBack());
|
---|
2122 | nodeStack.push(interior->GetFront());
|
---|
2123 | }
|
---|
2124 | }
|
---|
2125 | }
|
---|
2126 | }
|
---|
2127 |
|
---|
2128 | return (int)neighbors.size();
|
---|
2129 | }
|
---|
2130 |
|
---|
2131 |
|
---|
2132 | // Find random neighbor which was not mailed
|
---|
2133 | VspLeaf *VspTree::GetRandomLeaf(const Plane3 &plane)
|
---|
2134 | {
|
---|
2135 | stack<VspNode *> nodeStack;
|
---|
2136 | nodeStack.push(mRoot);
|
---|
2137 |
|
---|
2138 | int mask = rand();
|
---|
2139 |
|
---|
2140 | while (!nodeStack.empty())
|
---|
2141 | {
|
---|
2142 | VspNode *node = nodeStack.top();
|
---|
2143 |
|
---|
2144 | nodeStack.pop();
|
---|
2145 |
|
---|
2146 | if (node->IsLeaf())
|
---|
2147 | {
|
---|
2148 | return dynamic_cast<VspLeaf *>(node);
|
---|
2149 | }
|
---|
2150 | else
|
---|
2151 | {
|
---|
2152 | VspInterior *interior = dynamic_cast<VspInterior *>(node);
|
---|
2153 | VspNode *next;
|
---|
2154 |
|
---|
2155 | if (GetBoundingBox(interior->GetBack()).Side(plane) < 0)
|
---|
2156 | {
|
---|
2157 | next = interior->GetFront();
|
---|
2158 | }
|
---|
2159 | else
|
---|
2160 | {
|
---|
2161 | if (GetBoundingBox(interior->GetFront()).Side(plane) < 0)
|
---|
2162 | {
|
---|
2163 | next = interior->GetBack();
|
---|
2164 | }
|
---|
2165 | else
|
---|
2166 | {
|
---|
2167 | // random decision
|
---|
2168 | if (mask & 1)
|
---|
2169 | next = interior->GetBack();
|
---|
2170 | else
|
---|
2171 | next = interior->GetFront();
|
---|
2172 | mask = mask >> 1;
|
---|
2173 | }
|
---|
2174 | }
|
---|
2175 |
|
---|
2176 | nodeStack.push(next);
|
---|
2177 | }
|
---|
2178 | }
|
---|
2179 |
|
---|
2180 | return NULL;
|
---|
2181 | }
|
---|
2182 |
|
---|
2183 |
|
---|
2184 | VspLeaf *VspTree::GetRandomLeaf(const bool onlyUnmailed)
|
---|
2185 | {
|
---|
2186 | stack<VspNode *> nodeStack;
|
---|
2187 |
|
---|
2188 | nodeStack.push(mRoot);
|
---|
2189 |
|
---|
2190 | int mask = rand();
|
---|
2191 |
|
---|
2192 | while (!nodeStack.empty())
|
---|
2193 | {
|
---|
2194 | VspNode *node = nodeStack.top();
|
---|
2195 | nodeStack.pop();
|
---|
2196 |
|
---|
2197 | if (node->IsLeaf())
|
---|
2198 | {
|
---|
2199 | if ( (!onlyUnmailed || !node->Mailed()) )
|
---|
2200 | return dynamic_cast<VspLeaf *>(node);
|
---|
2201 | }
|
---|
2202 | else
|
---|
2203 | {
|
---|
2204 | VspInterior *interior = dynamic_cast<VspInterior *>(node);
|
---|
2205 |
|
---|
2206 | // random decision
|
---|
2207 | if (mask & 1)
|
---|
2208 | nodeStack.push(interior->GetBack());
|
---|
2209 | else
|
---|
2210 | nodeStack.push(interior->GetFront());
|
---|
2211 |
|
---|
2212 | mask = mask >> 1;
|
---|
2213 | }
|
---|
2214 | }
|
---|
2215 |
|
---|
2216 | return NULL;
|
---|
2217 | }
|
---|
2218 |
|
---|
2219 |
|
---|
2220 | void VspTree::CollectPvs(const RayInfoContainer &rays,
|
---|
2221 | ObjectContainer &objects) const
|
---|
2222 | {
|
---|
2223 | RayInfoContainer::const_iterator rit, rit_end = rays.end();
|
---|
2224 |
|
---|
2225 | Intersectable::NewMail();
|
---|
2226 |
|
---|
2227 | for (rit = rays.begin(); rit != rays.end(); ++ rit)
|
---|
2228 | {
|
---|
2229 | VssRay *ray = (*rit).mRay;
|
---|
2230 |
|
---|
2231 | Intersectable *object;
|
---|
2232 | object = ray->mOriginObject;
|
---|
2233 |
|
---|
2234 | if (object)
|
---|
2235 | {
|
---|
2236 | if (!object->Mailed())
|
---|
2237 | {
|
---|
2238 | object->Mail();
|
---|
2239 | objects.push_back(object);
|
---|
2240 | }
|
---|
2241 | }
|
---|
2242 |
|
---|
2243 | object = ray->mTerminationObject;
|
---|
2244 |
|
---|
2245 | if (object)
|
---|
2246 | {
|
---|
2247 | if (!object->Mailed())
|
---|
2248 | {
|
---|
2249 | object->Mail();
|
---|
2250 | objects.push_back(object);
|
---|
2251 | }
|
---|
2252 | }
|
---|
2253 | }
|
---|
2254 | }
|
---|
2255 |
|
---|
2256 |
|
---|
2257 | int VspTree::EvalPvsContribution(const VssRay &ray, const bool isTermination) const
|
---|
2258 | {
|
---|
2259 | Intersectable *obj;
|
---|
2260 | Vector3 pt;
|
---|
2261 | KdNode *node;
|
---|
2262 |
|
---|
2263 | ray.GetSampleData(isTermination, pt, &obj, &node);
|
---|
2264 |
|
---|
2265 | if (!obj) return 0;
|
---|
2266 |
|
---|
2267 | int pvs = 0;
|
---|
2268 |
|
---|
2269 | switch(mHierarchyManager->GetObjectSpaceSubdivisonType())
|
---|
2270 | {
|
---|
2271 | case HierarchyManager::NO_OBJ_SUBDIV:
|
---|
2272 | {
|
---|
2273 | if (!obj->Mailed())
|
---|
2274 | {
|
---|
2275 | obj->Mail();
|
---|
2276 | ++ pvs;
|
---|
2277 | }
|
---|
2278 |
|
---|
2279 | break;
|
---|
2280 | }
|
---|
2281 | case HierarchyManager::KD_BASED_OBJ_SUBDIV:
|
---|
2282 | {
|
---|
2283 | KdLeaf *leaf = mHierarchyManager->mOspTree->GetLeaf(pt, node);
|
---|
2284 |
|
---|
2285 | if (!leaf->Mailed())
|
---|
2286 | {
|
---|
2287 | leaf->Mail();
|
---|
2288 | pvs += (int)(leaf->mObjects.size() - leaf->mMultipleObjects.size());
|
---|
2289 |
|
---|
2290 | ObjectContainer::const_iterator oit, oit_end = leaf->mMultipleObjects.end();
|
---|
2291 | for (oit = leaf->mMultipleObjects.begin(); oit != oit_end; ++ oit)
|
---|
2292 | {
|
---|
2293 | Intersectable *obj = *oit;
|
---|
2294 |
|
---|
2295 | if (!obj->Mailed())
|
---|
2296 | {
|
---|
2297 | obj->Mail();
|
---|
2298 | ++ pvs;
|
---|
2299 | }
|
---|
2300 | }
|
---|
2301 | }
|
---|
2302 |
|
---|
2303 | break;
|
---|
2304 | }
|
---|
2305 | case HierarchyManager::BV_BASED_OBJ_SUBDIV:
|
---|
2306 | {
|
---|
2307 | BvhLeaf *bvhleaf = mHierarchyManager->mBvHierarchy->GetLeaf(obj);
|
---|
2308 |
|
---|
2309 | if (!bvhleaf->Mailed())
|
---|
2310 | {
|
---|
2311 | bvhleaf->Mail();
|
---|
2312 | pvs += (int)bvhleaf->mObjects.size();
|
---|
2313 | }
|
---|
2314 |
|
---|
2315 | break;
|
---|
2316 | }
|
---|
2317 | default:
|
---|
2318 | break;
|
---|
2319 | }
|
---|
2320 |
|
---|
2321 | return pvs;
|
---|
2322 | }
|
---|
2323 |
|
---|
2324 |
|
---|
2325 | int VspTree::EvalPvsSize(const RayInfoContainer &rays) const
|
---|
2326 | {
|
---|
2327 | int pvsSize = 0;
|
---|
2328 |
|
---|
2329 | Intersectable::NewMail();
|
---|
2330 | KdNode::NewMail();
|
---|
2331 | BvhNode::NewMail();
|
---|
2332 |
|
---|
2333 | RayInfoContainer::const_iterator rit, rit_end = rays.end();
|
---|
2334 |
|
---|
2335 | for (rit = rays.begin(); rit != rays.end(); ++ rit)
|
---|
2336 | {
|
---|
2337 | VssRay *ray = (*rit).mRay;
|
---|
2338 | pvsSize += EvalPvsContribution(*ray, true);
|
---|
2339 | pvsSize += EvalPvsContribution(*ray, false);
|
---|
2340 | }
|
---|
2341 |
|
---|
2342 | return pvsSize;
|
---|
2343 | }
|
---|
2344 |
|
---|
2345 |
|
---|
2346 | float VspTree::GetEpsilon() const
|
---|
2347 | {
|
---|
2348 | return mEpsilon;
|
---|
2349 | }
|
---|
2350 |
|
---|
2351 |
|
---|
2352 | int VspTree::CastLineSegment(const Vector3 &origin,
|
---|
2353 | const Vector3 &termination,
|
---|
2354 | ViewCellContainer &viewcells)
|
---|
2355 | {
|
---|
2356 | int hits = 0;
|
---|
2357 |
|
---|
2358 | float mint = 0.0f, maxt = 1.0f;
|
---|
2359 | const Vector3 dir = termination - origin;
|
---|
2360 |
|
---|
2361 | stack<LineTraversalData> tStack;
|
---|
2362 |
|
---|
2363 | //Intersectable::NewMail();
|
---|
2364 | //ViewCell::NewMail();
|
---|
2365 |
|
---|
2366 | Vector3 entp = origin;
|
---|
2367 | Vector3 extp = termination;
|
---|
2368 |
|
---|
2369 | VspNode *node = mRoot;
|
---|
2370 | VspNode *farChild;
|
---|
2371 |
|
---|
2372 | float position;
|
---|
2373 | int axis;
|
---|
2374 |
|
---|
2375 | while (1)
|
---|
2376 | {
|
---|
2377 | if (!node->IsLeaf())
|
---|
2378 | {
|
---|
2379 | VspInterior *in = dynamic_cast<VspInterior *>(node);
|
---|
2380 | position = in->GetPosition();
|
---|
2381 | axis = in->GetAxis();
|
---|
2382 |
|
---|
2383 | if (entp[axis] <= position)
|
---|
2384 | {
|
---|
2385 | if (extp[axis] <= position)
|
---|
2386 | {
|
---|
2387 | node = in->GetBack();
|
---|
2388 | // cases N1,N2,N3,P5,Z2,Z3
|
---|
2389 | continue;
|
---|
2390 | } else
|
---|
2391 | {
|
---|
2392 | // case N4
|
---|
2393 | node = in->GetBack();
|
---|
2394 | farChild = in->GetFront();
|
---|
2395 | }
|
---|
2396 | }
|
---|
2397 | else
|
---|
2398 | {
|
---|
2399 | if (position <= extp[axis])
|
---|
2400 | {
|
---|
2401 | node = in->GetFront();
|
---|
2402 | // cases P1,P2,P3,N5,Z1
|
---|
2403 | continue;
|
---|
2404 | }
|
---|
2405 | else
|
---|
2406 | {
|
---|
2407 | node = in->GetFront();
|
---|
2408 | farChild = in->GetBack();
|
---|
2409 | // case P4
|
---|
2410 | }
|
---|
2411 | }
|
---|
2412 |
|
---|
2413 | // $$ modification 3.5.2004 - hints from Kamil Ghais
|
---|
2414 | // case N4 or P4
|
---|
2415 | const float tdist = (position - origin[axis]) / dir[axis];
|
---|
2416 | tStack.push(LineTraversalData(farChild, extp, maxt)); //TODO
|
---|
2417 |
|
---|
2418 | extp = origin + dir * tdist;
|
---|
2419 | maxt = tdist;
|
---|
2420 | }
|
---|
2421 | else
|
---|
2422 | {
|
---|
2423 | // compute intersection with all objects in this leaf
|
---|
2424 | VspLeaf *leaf = dynamic_cast<VspLeaf *>(node);
|
---|
2425 | ViewCell *vc = leaf->GetViewCell();
|
---|
2426 |
|
---|
2427 | // don't have to mail because each view cell belongs to exactly one leaf
|
---|
2428 | //if (!vc->Mailed())
|
---|
2429 | //{
|
---|
2430 | // vc->Mail();
|
---|
2431 | viewcells.push_back(vc);
|
---|
2432 | ++ hits;
|
---|
2433 | //}
|
---|
2434 | #if 0
|
---|
2435 | leaf->mRays.push_back(RayInfo(new VssRay(origin, termination, NULL, NULL, 0)));
|
---|
2436 | #endif
|
---|
2437 | // get the next node from the stack
|
---|
2438 | if (tStack.empty())
|
---|
2439 | break;
|
---|
2440 |
|
---|
2441 | entp = extp;
|
---|
2442 | mint = maxt;
|
---|
2443 |
|
---|
2444 | LineTraversalData &s = tStack.top();
|
---|
2445 | node = s.mNode;
|
---|
2446 | extp = s.mExitPoint;
|
---|
2447 | maxt = s.mMaxT;
|
---|
2448 | tStack.pop();
|
---|
2449 | }
|
---|
2450 | }
|
---|
2451 |
|
---|
2452 | return hits;
|
---|
2453 | }
|
---|
2454 |
|
---|
2455 |
|
---|
2456 | int VspTree::CastRay(Ray &ray)
|
---|
2457 | {
|
---|
2458 | int hits = 0;
|
---|
2459 |
|
---|
2460 | stack<LineTraversalData> tStack;
|
---|
2461 | const Vector3 dir = ray.GetDir();
|
---|
2462 |
|
---|
2463 | float maxt, mint;
|
---|
2464 |
|
---|
2465 | if (!mBoundingBox.GetRaySegment(ray, mint, maxt))
|
---|
2466 | return 0;
|
---|
2467 |
|
---|
2468 | Intersectable::NewMail();
|
---|
2469 | ViewCell::NewMail();
|
---|
2470 |
|
---|
2471 | Vector3 entp = ray.Extrap(mint);
|
---|
2472 | Vector3 extp = ray.Extrap(maxt);
|
---|
2473 |
|
---|
2474 | const Vector3 origin = entp;
|
---|
2475 |
|
---|
2476 | VspNode *node = mRoot;
|
---|
2477 | VspNode *farChild = NULL;
|
---|
2478 |
|
---|
2479 | float position;
|
---|
2480 | int axis;
|
---|
2481 |
|
---|
2482 | while (1)
|
---|
2483 | {
|
---|
2484 | if (!node->IsLeaf())
|
---|
2485 | {
|
---|
2486 | VspInterior *in = dynamic_cast<VspInterior *>(node);
|
---|
2487 | position = in->GetPosition();
|
---|
2488 | axis = in->GetAxis();
|
---|
2489 |
|
---|
2490 | if (entp[axis] <= position)
|
---|
2491 | {
|
---|
2492 | if (extp[axis] <= position)
|
---|
2493 | {
|
---|
2494 | node = in->GetBack();
|
---|
2495 | // cases N1,N2,N3,P5,Z2,Z3
|
---|
2496 | continue;
|
---|
2497 | }
|
---|
2498 | else
|
---|
2499 | {
|
---|
2500 | // case N4
|
---|
2501 | node = in->GetBack();
|
---|
2502 | farChild = in->GetFront();
|
---|
2503 | }
|
---|
2504 | }
|
---|
2505 | else
|
---|
2506 | {
|
---|
2507 | if (position <= extp[axis])
|
---|
2508 | {
|
---|
2509 | node = in->GetFront();
|
---|
2510 | // cases P1,P2,P3,N5,Z1
|
---|
2511 | continue;
|
---|
2512 | }
|
---|
2513 | else
|
---|
2514 | {
|
---|
2515 | node = in->GetFront();
|
---|
2516 | farChild = in->GetBack();
|
---|
2517 | // case P4
|
---|
2518 | }
|
---|
2519 | }
|
---|
2520 |
|
---|
2521 | // $$ modification 3.5.2004 - hints from Kamil Ghais
|
---|
2522 | // case N4 or P4
|
---|
2523 | const float tdist = (position - origin[axis]) / dir[axis];
|
---|
2524 | tStack.push(LineTraversalData(farChild, extp, maxt)); //TODO
|
---|
2525 | extp = origin + dir * tdist;
|
---|
2526 | maxt = tdist;
|
---|
2527 | }
|
---|
2528 | else
|
---|
2529 | {
|
---|
2530 | // compute intersection with all objects in this leaf
|
---|
2531 | VspLeaf *leaf = dynamic_cast<VspLeaf *>(node);
|
---|
2532 | ViewCell *vc = leaf->GetViewCell();
|
---|
2533 |
|
---|
2534 | if (!vc->Mailed())
|
---|
2535 | {
|
---|
2536 | vc->Mail();
|
---|
2537 | // todo: add view cells to ray
|
---|
2538 | ++ hits;
|
---|
2539 | }
|
---|
2540 | #if 0
|
---|
2541 | leaf->mRays.push_back(RayInfo(new VssRay(origin, termination, NULL, NULL, 0)));
|
---|
2542 | #endif
|
---|
2543 | // get the next node from the stack
|
---|
2544 | if (tStack.empty())
|
---|
2545 | break;
|
---|
2546 |
|
---|
2547 | entp = extp;
|
---|
2548 | mint = maxt;
|
---|
2549 |
|
---|
2550 | LineTraversalData &s = tStack.top();
|
---|
2551 | node = s.mNode;
|
---|
2552 | extp = s.mExitPoint;
|
---|
2553 | maxt = s.mMaxT;
|
---|
2554 | tStack.pop();
|
---|
2555 | }
|
---|
2556 | }
|
---|
2557 |
|
---|
2558 | return hits;
|
---|
2559 | }
|
---|
2560 |
|
---|
2561 |
|
---|
2562 | ViewCell *VspTree::GetViewCell(const Vector3 &point, const bool active)
|
---|
2563 | {
|
---|
2564 | if (mRoot == NULL)
|
---|
2565 | return NULL;
|
---|
2566 |
|
---|
2567 | stack<VspNode *> nodeStack;
|
---|
2568 | nodeStack.push(mRoot);
|
---|
2569 |
|
---|
2570 | ViewCellLeaf *viewcell = NULL;
|
---|
2571 |
|
---|
2572 | while (!nodeStack.empty())
|
---|
2573 | {
|
---|
2574 | VspNode *node = nodeStack.top();
|
---|
2575 | nodeStack.pop();
|
---|
2576 |
|
---|
2577 | if (node->IsLeaf())
|
---|
2578 | {
|
---|
2579 | viewcell = dynamic_cast<VspLeaf *>(node)->GetViewCell();
|
---|
2580 | break;
|
---|
2581 | }
|
---|
2582 | else
|
---|
2583 | {
|
---|
2584 | VspInterior *interior = dynamic_cast<VspInterior *>(node);
|
---|
2585 |
|
---|
2586 | // random decision
|
---|
2587 | if (interior->GetPosition() - point[interior->GetAxis()] < 0)
|
---|
2588 | nodeStack.push(interior->GetBack());
|
---|
2589 | else
|
---|
2590 | nodeStack.push(interior->GetFront());
|
---|
2591 | }
|
---|
2592 | }
|
---|
2593 |
|
---|
2594 | if (active)
|
---|
2595 | return mViewCellsTree->GetActiveViewCell(viewcell);
|
---|
2596 | else
|
---|
2597 | return viewcell;
|
---|
2598 | }
|
---|
2599 |
|
---|
2600 |
|
---|
2601 | bool VspTree::ViewPointValid(const Vector3 &viewPoint) const
|
---|
2602 | {
|
---|
2603 | VspNode *node = mRoot;
|
---|
2604 |
|
---|
2605 | while (1)
|
---|
2606 | {
|
---|
2607 | // early exit
|
---|
2608 | if (node->TreeValid())
|
---|
2609 | return true;
|
---|
2610 |
|
---|
2611 | if (node->IsLeaf())
|
---|
2612 | return false;
|
---|
2613 |
|
---|
2614 | VspInterior *in = dynamic_cast<VspInterior *>(node);
|
---|
2615 |
|
---|
2616 | if (in->GetPosition() - viewPoint[in->GetAxis()] <= 0)
|
---|
2617 | {
|
---|
2618 | node = in->GetBack();
|
---|
2619 | }
|
---|
2620 | else
|
---|
2621 | {
|
---|
2622 | node = in->GetFront();
|
---|
2623 | }
|
---|
2624 | }
|
---|
2625 |
|
---|
2626 | // should never come here
|
---|
2627 | return false;
|
---|
2628 | }
|
---|
2629 |
|
---|
2630 |
|
---|
2631 | void VspTree::PropagateUpValidity(VspNode *node)
|
---|
2632 | {
|
---|
2633 | const bool isValid = node->TreeValid();
|
---|
2634 |
|
---|
2635 | // propagative up invalid flag until only invalid nodes exist over this node
|
---|
2636 | if (!isValid)
|
---|
2637 | {
|
---|
2638 | while (!node->IsRoot() && node->GetParent()->TreeValid())
|
---|
2639 | {
|
---|
2640 | node = node->GetParent();
|
---|
2641 | node->SetTreeValid(false);
|
---|
2642 | }
|
---|
2643 | }
|
---|
2644 | else
|
---|
2645 | {
|
---|
2646 | // propagative up valid flag until one of the subtrees is invalid
|
---|
2647 | while (!node->IsRoot() && !node->TreeValid())
|
---|
2648 | {
|
---|
2649 | node = node->GetParent();
|
---|
2650 | VspInterior *interior = dynamic_cast<VspInterior *>(node);
|
---|
2651 |
|
---|
2652 | // the parent is valid iff both leaves are valid
|
---|
2653 | node->SetTreeValid(interior->GetBack()->TreeValid() &&
|
---|
2654 | interior->GetFront()->TreeValid());
|
---|
2655 | }
|
---|
2656 | }
|
---|
2657 | }
|
---|
2658 |
|
---|
2659 |
|
---|
2660 | bool VspTree::Export(OUT_STREAM &stream)
|
---|
2661 | {
|
---|
2662 | ExportNode(mRoot, stream);
|
---|
2663 |
|
---|
2664 | return true;
|
---|
2665 | }
|
---|
2666 |
|
---|
2667 |
|
---|
2668 | void VspTree::ExportNode(VspNode *node, OUT_STREAM &stream)
|
---|
2669 | {
|
---|
2670 | if (node->IsLeaf())
|
---|
2671 | {
|
---|
2672 | VspLeaf *leaf = dynamic_cast<VspLeaf *>(node);
|
---|
2673 | ViewCell *viewCell = mViewCellsTree->GetActiveViewCell(leaf->GetViewCell());
|
---|
2674 |
|
---|
2675 | int id = -1;
|
---|
2676 | if (viewCell != mOutOfBoundsCell)
|
---|
2677 | id = viewCell->GetId();
|
---|
2678 |
|
---|
2679 | stream << "<Leaf viewCellId=\"" << id << "\" />" << endl;
|
---|
2680 | }
|
---|
2681 | else
|
---|
2682 | {
|
---|
2683 | VspInterior *interior = dynamic_cast<VspInterior *>(node);
|
---|
2684 |
|
---|
2685 | AxisAlignedPlane plane = interior->GetPlane();
|
---|
2686 | stream << "<Interior plane=\"" << plane.mPosition << " "
|
---|
2687 | << plane.mAxis << "\">" << endl;
|
---|
2688 |
|
---|
2689 | ExportNode(interior->GetBack(), stream);
|
---|
2690 | ExportNode(interior->GetFront(), stream);
|
---|
2691 |
|
---|
2692 | stream << "</Interior>" << endl;
|
---|
2693 | }
|
---|
2694 | }
|
---|
2695 |
|
---|
2696 |
|
---|
2697 | int VspTree::SplitRays(const AxisAlignedPlane &plane,
|
---|
2698 | RayInfoContainer &rays,
|
---|
2699 | RayInfoContainer &frontRays,
|
---|
2700 | RayInfoContainer &backRays) const
|
---|
2701 | {
|
---|
2702 | int splits = 0;
|
---|
2703 |
|
---|
2704 | RayInfoContainer::const_iterator rit, rit_end = rays.end();
|
---|
2705 |
|
---|
2706 | for (rit = rays.begin(); rit != rit_end; ++ rit)
|
---|
2707 | {
|
---|
2708 | RayInfo bRay = *rit;
|
---|
2709 |
|
---|
2710 | VssRay *ray = bRay.mRay;
|
---|
2711 | float t;
|
---|
2712 |
|
---|
2713 | // get classification and receive new t
|
---|
2714 | // test if start point behind or in front of plane
|
---|
2715 | const int side = bRay.ComputeRayIntersection(plane.mAxis, plane.mPosition, t);
|
---|
2716 |
|
---|
2717 | if (side == 0)
|
---|
2718 | {
|
---|
2719 | ++ splits;
|
---|
2720 |
|
---|
2721 | if (ray->HasPosDir(plane.mAxis))
|
---|
2722 | {
|
---|
2723 | backRays.push_back(RayInfo(ray, bRay.GetMinT(), t));
|
---|
2724 | frontRays.push_back(RayInfo(ray, t, bRay.GetMaxT()));
|
---|
2725 | }
|
---|
2726 | else
|
---|
2727 | {
|
---|
2728 | frontRays.push_back(RayInfo(ray, bRay.GetMinT(), t));
|
---|
2729 | backRays.push_back(RayInfo(ray, t, bRay.GetMaxT()));
|
---|
2730 | }
|
---|
2731 | }
|
---|
2732 | else if (side == 1)
|
---|
2733 | {
|
---|
2734 | frontRays.push_back(bRay);
|
---|
2735 | }
|
---|
2736 | else
|
---|
2737 | {
|
---|
2738 | backRays.push_back(bRay);
|
---|
2739 | }
|
---|
2740 | }
|
---|
2741 |
|
---|
2742 | return splits;
|
---|
2743 | }
|
---|
2744 |
|
---|
2745 |
|
---|
2746 | AxisAlignedBox3 VspTree::GetBoundingBox(VspNode *node) const
|
---|
2747 | {
|
---|
2748 | if (!node->GetParent())
|
---|
2749 | return mBoundingBox;
|
---|
2750 |
|
---|
2751 | if (!node->IsLeaf())
|
---|
2752 | {
|
---|
2753 | return (dynamic_cast<VspInterior *>(node))->GetBoundingBox();
|
---|
2754 | }
|
---|
2755 |
|
---|
2756 | VspInterior *parent = dynamic_cast<VspInterior *>(node->GetParent());
|
---|
2757 |
|
---|
2758 | AxisAlignedBox3 box(parent->GetBoundingBox());
|
---|
2759 |
|
---|
2760 | if (parent->GetFront() == node)
|
---|
2761 | box.SetMin(parent->GetAxis(), parent->GetPosition());
|
---|
2762 | else
|
---|
2763 | box.SetMax(parent->GetAxis(), parent->GetPosition());
|
---|
2764 |
|
---|
2765 | return box;
|
---|
2766 | }
|
---|
2767 |
|
---|
2768 |
|
---|
2769 | int VspTree::ComputeBoxIntersections(const AxisAlignedBox3 &box,
|
---|
2770 | ViewCellContainer &viewCells) const
|
---|
2771 | {
|
---|
2772 | stack<VspNode *> nodeStack;
|
---|
2773 |
|
---|
2774 | ViewCell::NewMail();
|
---|
2775 |
|
---|
2776 | while (!nodeStack.empty())
|
---|
2777 | {
|
---|
2778 | VspNode *node = nodeStack.top();
|
---|
2779 | nodeStack.pop();
|
---|
2780 |
|
---|
2781 | const AxisAlignedBox3 bbox = GetBoundingBox(node);
|
---|
2782 |
|
---|
2783 | if (bbox.Includes(box))
|
---|
2784 | {
|
---|
2785 | // node geometry is contained in box
|
---|
2786 | CollectViewCells(node, true, viewCells, true);
|
---|
2787 | }
|
---|
2788 | else if (Overlap(bbox, box))
|
---|
2789 | {
|
---|
2790 | if (node->IsLeaf())
|
---|
2791 | {
|
---|
2792 | BspLeaf *leaf = dynamic_cast<BspLeaf *>(node);
|
---|
2793 |
|
---|
2794 | if (!leaf->GetViewCell()->Mailed() && leaf->TreeValid())
|
---|
2795 | {
|
---|
2796 | leaf->GetViewCell()->Mail();
|
---|
2797 | viewCells.push_back(leaf->GetViewCell());
|
---|
2798 | }
|
---|
2799 | }
|
---|
2800 | else
|
---|
2801 | {
|
---|
2802 | VspInterior *interior = dynamic_cast<VspInterior *>(node);
|
---|
2803 |
|
---|
2804 | VspNode *first = interior->GetFront();
|
---|
2805 | VspNode *second = interior->GetBack();
|
---|
2806 |
|
---|
2807 | nodeStack.push(first);
|
---|
2808 | nodeStack.push(second);
|
---|
2809 | }
|
---|
2810 | }
|
---|
2811 | // default: cull
|
---|
2812 | }
|
---|
2813 |
|
---|
2814 | return (int)viewCells.size();
|
---|
2815 | }
|
---|
2816 |
|
---|
2817 |
|
---|
2818 | void VspTree::PreprocessRays(const VssRayContainer &sampleRays,
|
---|
2819 | RayInfoContainer &rays)
|
---|
2820 | {
|
---|
2821 | VssRayContainer::const_iterator rit, rit_end = sampleRays.end();
|
---|
2822 |
|
---|
2823 | long startTime = GetTime();
|
---|
2824 |
|
---|
2825 | cout << "storing rays ... ";
|
---|
2826 |
|
---|
2827 | Intersectable::NewMail();
|
---|
2828 |
|
---|
2829 | //-- store rays and objects
|
---|
2830 | for (rit = sampleRays.begin(); rit != rit_end; ++ rit)
|
---|
2831 | {
|
---|
2832 | VssRay *ray = *rit;
|
---|
2833 | float minT, maxT;
|
---|
2834 | static Ray hray;
|
---|
2835 |
|
---|
2836 | hray.Init(*ray);
|
---|
2837 |
|
---|
2838 | // TODO: not very efficient to implictly cast between rays types
|
---|
2839 | if (GetBoundingBox().GetRaySegment(hray, minT, maxT))
|
---|
2840 | {
|
---|
2841 | float len = ray->Length();
|
---|
2842 |
|
---|
2843 | if (!len)
|
---|
2844 | len = Limits::Small;
|
---|
2845 |
|
---|
2846 | rays.push_back(RayInfo(ray, minT / len, maxT / len));
|
---|
2847 | }
|
---|
2848 | }
|
---|
2849 |
|
---|
2850 | cout << "finished in " << TimeDiff(startTime, GetTime()) * 1e-3 << " secs" << endl;
|
---|
2851 | }
|
---|
2852 |
|
---|
2853 |
|
---|
2854 | void VspTree::GetViewCells(const VssRay &ray, ViewCellContainer &viewCells)
|
---|
2855 | {
|
---|
2856 | #if 0
|
---|
2857 | // use view cells manager to compute view cells
|
---|
2858 | mViewCellsManager->ComputeSampleContribution(ray, false, true);
|
---|
2859 | viewCells = ray.mViewCells;
|
---|
2860 | ray.mViewCells.clear();
|
---|
2861 |
|
---|
2862 | #else
|
---|
2863 | static Ray hray;
|
---|
2864 | hray.Init(ray);
|
---|
2865 |
|
---|
2866 | float tmin = 0, tmax = 1.0;
|
---|
2867 |
|
---|
2868 | if (!mBoundingBox.GetRaySegment(hray, tmin, tmax) || (tmin > tmax))
|
---|
2869 | return;
|
---|
2870 |
|
---|
2871 | const Vector3 origin = hray.Extrap(tmin);
|
---|
2872 | const Vector3 termination = hray.Extrap(tmax);
|
---|
2873 |
|
---|
2874 | // if no precomputation of view cells
|
---|
2875 | CastLineSegment(origin, termination, viewCells);
|
---|
2876 | #endif
|
---|
2877 | }
|
---|
2878 |
|
---|
2879 |
|
---|
2880 | SubdivisionCandidate *VspTree::PrepareConstruction(const VssRayContainer &sampleRays,
|
---|
2881 | AxisAlignedBox3 *forcedViewSpace,
|
---|
2882 | RayInfoContainer &rays)
|
---|
2883 | {
|
---|
2884 | // store pointer to this tree
|
---|
2885 | VspSubdivisionCandidate::sVspTree = this;
|
---|
2886 | mVspStats.nodes = 1;
|
---|
2887 |
|
---|
2888 | // compute view space bounding box
|
---|
2889 | ComputeBoundingBox(sampleRays, forcedViewSpace);
|
---|
2890 |
|
---|
2891 | // initialise termination criteria
|
---|
2892 | mTermMinProbability *= mBoundingBox.GetVolume();
|
---|
2893 | mGlobalCostMisses = 0;
|
---|
2894 |
|
---|
2895 | // get clipped rays
|
---|
2896 | PreprocessRays(sampleRays, rays);
|
---|
2897 |
|
---|
2898 | const int pvsSize = EvalPvsSize(rays);
|
---|
2899 |
|
---|
2900 | Debug << "pvs size: " << (int)pvsSize << endl;
|
---|
2901 | Debug << "rays size: " << (int)rays.size() << endl;
|
---|
2902 |
|
---|
2903 | //-- prepare view space partition
|
---|
2904 |
|
---|
2905 | // add first candidate for view space partition
|
---|
2906 | VspLeaf *leaf = new VspLeaf();
|
---|
2907 | mRoot = leaf;
|
---|
2908 |
|
---|
2909 | const float prop = mBoundingBox.GetVolume();
|
---|
2910 |
|
---|
2911 | // first vsp traversal data
|
---|
2912 | VspTraversalData vData(leaf, 0, &rays, pvsSize, prop, mBoundingBox);
|
---|
2913 |
|
---|
2914 | // create first view cell
|
---|
2915 | CreateViewCell(vData, false);
|
---|
2916 |
|
---|
2917 | #if WORK_WITH_VIEWCELL_PVS
|
---|
2918 |
|
---|
2919 | // add first view cell to all the objects view cell pvs
|
---|
2920 | ObjectPvsMap::const_iterator oit,
|
---|
2921 | oit_end = leaf->GetViewCell()->GetPvs().mEntries.end();
|
---|
2922 |
|
---|
2923 |
|
---|
2924 | for (oit = leaf->GetViewCell()->GetPvs().mEntries.begin(); oit != oit_end; ++ oit)
|
---|
2925 | {
|
---|
2926 | Intersectable *obj = (*oit).first;
|
---|
2927 | obj->mViewCellPvs.AddSample(leaf->GetViewCell(), 1);
|
---|
2928 | }
|
---|
2929 | #endif
|
---|
2930 |
|
---|
2931 | //-- compute first split candidate
|
---|
2932 |
|
---|
2933 | VspSubdivisionCandidate *splitCandidate = new VspSubdivisionCandidate(vData);
|
---|
2934 | EvalSubdivisionCandidate(*splitCandidate);
|
---|
2935 |
|
---|
2936 | mTotalCost = (float)pvsSize;
|
---|
2937 | EvalSubdivisionStats(*splitCandidate);
|
---|
2938 |
|
---|
2939 | return splitCandidate;
|
---|
2940 | }
|
---|
2941 |
|
---|
2942 |
|
---|
2943 | void VspTree::CollectDirtyCandidates(VspSubdivisionCandidate *sc,
|
---|
2944 | vector<SubdivisionCandidate *> &dirtyList)
|
---|
2945 | {
|
---|
2946 | VspTraversalData &tData = sc->mParentData;
|
---|
2947 | VspLeaf *node = tData.mNode;
|
---|
2948 |
|
---|
2949 | KdLeaf::NewMail();
|
---|
2950 |
|
---|
2951 | RayInfoContainer::const_iterator rit, rit_end = tData.mRays->end();
|
---|
2952 |
|
---|
2953 | // add all kd nodes seen by the rays
|
---|
2954 | for (rit = tData.mRays->begin(); rit != rit_end; ++ rit)
|
---|
2955 | {
|
---|
2956 | VssRay *ray = (*rit).mRay;
|
---|
2957 |
|
---|
2958 | KdLeaf *leaf = mHierarchyManager->mOspTree->GetLeaf(ray->mOrigin, ray->mOriginNode);
|
---|
2959 |
|
---|
2960 | if (!leaf->Mailed())
|
---|
2961 | {
|
---|
2962 | leaf->Mail();
|
---|
2963 | dirtyList.push_back(leaf->mSubdivisionCandidate);
|
---|
2964 | }
|
---|
2965 |
|
---|
2966 | leaf = mHierarchyManager->mOspTree->GetLeaf(ray->mTermination, ray->mTerminationNode);
|
---|
2967 |
|
---|
2968 | if (!leaf->Mailed())
|
---|
2969 | {
|
---|
2970 | leaf->Mail();
|
---|
2971 | dirtyList.push_back(leaf->mSubdivisionCandidate);
|
---|
2972 | }
|
---|
2973 | }
|
---|
2974 | }
|
---|
2975 |
|
---|
2976 | } |
---|