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1///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
2/*
3 * OPCODE - Optimized Collision Detection
4 * Copyright (C) 2001 Pierre Terdiman
5 * Homepage: http://www.codercorner.com/Opcode.htm
6 */
7///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
8
9///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
10/**
11 * Contains code for an AABB collider.
12 * \file OPC_AABBCollider.cpp
13 * \author Pierre Terdiman
14 * \date January, 1st, 2002
15 */
16///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
17
18///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
19/**
20 * Contains an AABB-vs-tree collider.
21 *
22 * \class AABBCollider
23 * \author Pierre Terdiman
24 * \version 1.3
25 * \date January, 1st, 2002
26*/
27///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
28
29///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
30// Precompiled Header
31#include "Stdafx.h"
32
33using namespace Opcode;
34
35#include "OPC_BoxBoxOverlap.h"
36#include "OPC_TriBoxOverlap.h"
37
38#define SET_CONTACT(prim_index, flag) \
39 /* Set contact status */ \
40 mFlags |= flag; \
41 mTouchedPrimitives->Add(udword(prim_index));
42
43//! AABB-triangle test
44#define AABB_PRIM(prim_index, flag) \
45 /* Request vertices from the app */ \
46 VertexPointers VP; mIMesh->GetTriangle(VP, prim_index);\
47 mLeafVerts[0] = *VP.Vertex[0]; \
48 mLeafVerts[1] = *VP.Vertex[1]; \
49 mLeafVerts[2] = *VP.Vertex[2]; \
50 /* Perform triangle-box overlap test */ \
51 if(TriBoxOverlap()) \
52 { \
53 SET_CONTACT(prim_index, flag) \
54 }
55
56///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
57/**
58 * Constructor.
59 */
60///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
61AABBCollider::AABBCollider()
62{
63}
64
65///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
66/**
67 * Destructor.
68 */
69///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
70AABBCollider::~AABBCollider()
71{
72}
73
74///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
75/**
76 * Generic collision query for generic OPCODE models. After the call, access the results:
77 * - with GetContactStatus()
78 * - with GetNbTouchedPrimitives()
79 * - with GetTouchedPrimitives()
80 *
81 * \param cache [in/out] a box cache
82 * \param box [in] collision AABB in world space
83 * \param model [in] Opcode model to collide with
84 * \return true if success
85 * \warning SCALE NOT SUPPORTED. The matrices must contain rotation & translation parts only.
86 */
87///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
88bool AABBCollider::Collide(AABBCache& cache, const CollisionAABB& box, const Model& model)
89{
90 // Checkings
91 if(!Setup(&model)) return false;
92
93 // Init collision query
94 if(InitQuery(cache, box)) return true;
95
96 if(!model.HasLeafNodes())
97 {
98 if(model.IsQuantized())
99 {
100 const AABBQuantizedNoLeafTree* Tree = (const AABBQuantizedNoLeafTree*)model.GetTree();
101
102 // Setup dequantization coeffs
103 mCenterCoeff = Tree->mCenterCoeff;
104 mExtentsCoeff = Tree->mExtentsCoeff;
105
106 // Perform collision query
107 if(SkipPrimitiveTests()) _CollideNoPrimitiveTest(Tree->GetNodes());
108 else _Collide(Tree->GetNodes());
109 }
110 else
111 {
112 const AABBNoLeafTree* Tree = (const AABBNoLeafTree*)model.GetTree();
113
114 // Perform collision query
115 if(SkipPrimitiveTests()) _CollideNoPrimitiveTest(Tree->GetNodes());
116 else _Collide(Tree->GetNodes());
117 }
118 }
119 else
120 {
121 if(model.IsQuantized())
122 {
123 const AABBQuantizedTree* Tree = (const AABBQuantizedTree*)model.GetTree();
124
125 // Setup dequantization coeffs
126 mCenterCoeff = Tree->mCenterCoeff;
127 mExtentsCoeff = Tree->mExtentsCoeff;
128
129 // Perform collision query
130 if(SkipPrimitiveTests()) _CollideNoPrimitiveTest(Tree->GetNodes());
131 else _Collide(Tree->GetNodes());
132 }
133 else
134 {
135 const AABBCollisionTree* Tree = (const AABBCollisionTree*)model.GetTree();
136
137 // Perform collision query
138 if(SkipPrimitiveTests()) _CollideNoPrimitiveTest(Tree->GetNodes());
139 else _Collide(Tree->GetNodes());
140 }
141 }
142 return true;
143}
144
145///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
146/**
147 * Initializes a collision query :
148 * - reset stats & contact status
149 * - check temporal coherence
150 *
151 * \param cache [in/out] a box cache
152 * \param box [in] AABB in world space
153 * \return TRUE if we can return immediately
154 */
155///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
156BOOL AABBCollider::InitQuery(AABBCache& cache, const CollisionAABB& box)
157{
158 // 1) Call the base method
159 VolumeCollider::InitQuery();
160
161 // 2) Keep track of the query box
162 mBox = box;
163
164 // 3) Setup destination pointer
165 mTouchedPrimitives = &cache.TouchedPrimitives;
166
167 // 4) Special case: 1-triangle meshes [Opcode 1.3]
168 if(mCurrentModel && mCurrentModel->HasSingleNode())
169 {
170 if(!SkipPrimitiveTests())
171 {
172 // We simply perform the BV-Prim overlap test each time. We assume single triangle has index 0.
173 mTouchedPrimitives->Reset();
174
175 // Perform overlap test between the unique triangle and the box (and set contact status if needed)
176 AABB_PRIM(udword(0), OPC_CONTACT)
177
178 // Return immediately regardless of status
179 return TRUE;
180 }
181 }
182
183 // 5) Check temporal coherence :
184 if(TemporalCoherenceEnabled())
185 {
186 // Here we use temporal coherence
187 // => check results from previous frame before performing the collision query
188 if(FirstContactEnabled())
189 {
190 // We're only interested in the first contact found => test the unique previously touched face
191 if(mTouchedPrimitives->GetNbEntries())
192 {
193 // Get index of previously touched face = the first entry in the array
194 udword PreviouslyTouchedFace = mTouchedPrimitives->GetEntry(0);
195
196 // Then reset the array:
197 // - if the overlap test below is successful, the index we'll get added back anyway
198 // - if it isn't, then the array should be reset anyway for the normal query
199 mTouchedPrimitives->Reset();
200
201 // Perform overlap test between the cached triangle and the box (and set contact status if needed)
202 AABB_PRIM(PreviouslyTouchedFace, OPC_TEMPORAL_CONTACT)
203
204 // Return immediately if possible
205 if(GetContactStatus()) return TRUE;
206 }
207 // else no face has been touched during previous query
208 // => we'll have to perform a normal query
209 }
210 else
211 {
212 // We're interested in all contacts =>test the new real box N(ew) against the previous fat box P(revious):
213 if(IsCacheValid(cache) && mBox.IsInside(cache.FatBox))
214 {
215 // - if N is included in P, return previous list
216 // => we simply leave the list (mTouchedFaces) unchanged
217
218 // Set contact status if needed
219 if(mTouchedPrimitives->GetNbEntries()) mFlags |= OPC_TEMPORAL_CONTACT;
220
221 // In any case we don't need to do a query
222 return TRUE;
223 }
224 else
225 {
226 // - else do the query using a fat N
227
228 // Reset cache since we'll about to perform a real query
229 mTouchedPrimitives->Reset();
230
231 // Make a fat box so that coherence will work for subsequent frames
232 mBox.mExtents *= cache.FatCoeff;
233
234 // Update cache with query data (signature for cached faces)
235 cache.FatBox = mBox;
236 }
237 }
238 }
239 else
240 {
241 // Here we don't use temporal coherence => do a normal query
242 mTouchedPrimitives->Reset();
243 }
244
245 // 5) Precompute min & max bounds if needed
246 mMin = box.mCenter - box.mExtents;
247 mMax = box.mCenter + box.mExtents;
248
249 return FALSE;
250}
251
252///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
253/**
254 * Collision query for vanilla AABB trees.
255 * \param cache [in/out] a box cache
256 * \param box [in] collision AABB in world space
257 * \param tree [in] AABB tree
258 * \return true if success
259 */
260///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
261bool AABBCollider::Collide(AABBCache& cache, const CollisionAABB& box, const AABBTree* tree)
262{
263 // This is typically called for a scene tree, full of -AABBs-, not full of triangles.
264 // So we don't really have "primitives" to deal with. Hence it doesn't work with
265 // "FirstContact" + "TemporalCoherence".
266 ASSERT( !(FirstContactEnabled() && TemporalCoherenceEnabled()) );
267
268 // Checkings
269 if(!tree) return false;
270
271 // Init collision query
272 if(InitQuery(cache, box)) return true;
273
274 // Perform collision query
275 _Collide(tree);
276
277 return true;
278}
279
280///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
281/**
282 * Checks the AABB completely contains the box. In which case we can end the query sooner.
283 * \param bc [in] box center
284 * \param be [in] box extents
285 * \return true if the AABB contains the whole box
286 */
287///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
288inline_ BOOL AABBCollider::AABBContainsBox(const Point& bc, const Point& be)
289{
290 if(mMin.x > bc.x - be.x) return FALSE;
291 if(mMin.y > bc.y - be.y) return FALSE;
292 if(mMin.z > bc.z - be.z) return FALSE;
293
294 if(mMax.x < bc.x + be.x) return FALSE;
295 if(mMax.y < bc.y + be.y) return FALSE;
296 if(mMax.z < bc.z + be.z) return FALSE;
297
298 return TRUE;
299}
300
301#define TEST_BOX_IN_AABB(center, extents) \
302 if(AABBContainsBox(center, extents)) \
303 { \
304 /* Set contact status */ \
305 mFlags |= OPC_CONTACT; \
306 _Dump(node); \
307 return; \
308 }
309
310///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
311/**
312 * Recursive collision query for normal AABB trees.
313 * \param node [in] current collision node
314 */
315///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
316void AABBCollider::_Collide(const AABBCollisionNode* node)
317{
318 // Perform AABB-AABB overlap test
319 if(!AABBAABBOverlap(node->mAABB.mExtents, node->mAABB.mCenter)) return;
320
321 TEST_BOX_IN_AABB(node->mAABB.mCenter, node->mAABB.mExtents)
322
323 if(node->IsLeaf())
324 {
325 AABB_PRIM(node->GetPrimitive(), OPC_CONTACT)
326 }
327 else
328 {
329 _Collide(node->GetPos());
330
331 if(ContactFound()) return;
332
333 _Collide(node->GetNeg());
334 }
335}
336
337///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
338/**
339 * Recursive collision query for normal AABB trees, without primitive tests.
340 * \param node [in] current collision node
341 */
342///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
343void AABBCollider::_CollideNoPrimitiveTest(const AABBCollisionNode* node)
344{
345 // Perform AABB-AABB overlap test
346 if(!AABBAABBOverlap(node->mAABB.mExtents, node->mAABB.mCenter)) return;
347
348 TEST_BOX_IN_AABB(node->mAABB.mCenter, node->mAABB.mExtents)
349
350 if(node->IsLeaf())
351 {
352 SET_CONTACT(node->GetPrimitive(), OPC_CONTACT)
353 }
354 else
355 {
356 _CollideNoPrimitiveTest(node->GetPos());
357
358 if(ContactFound()) return;
359
360 _CollideNoPrimitiveTest(node->GetNeg());
361 }
362}
363
364///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
365/**
366 * Recursive collision query for quantized AABB trees.
367 * \param node [in] current collision node
368 */
369///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
370void AABBCollider::_Collide(const AABBQuantizedNode* node)
371{
372 // Dequantize box
373 const QuantizedAABB& Box = node->mAABB;
374 const Point Center(float(Box.mCenter[0]) * mCenterCoeff.x, float(Box.mCenter[1]) * mCenterCoeff.y, float(Box.mCenter[2]) * mCenterCoeff.z);
375 const Point Extents(float(Box.mExtents[0]) * mExtentsCoeff.x, float(Box.mExtents[1]) * mExtentsCoeff.y, float(Box.mExtents[2]) * mExtentsCoeff.z);
376
377 // Perform AABB-AABB overlap test
378 if(!AABBAABBOverlap(Extents, Center)) return;
379
380 TEST_BOX_IN_AABB(Center, Extents)
381
382 if(node->IsLeaf())
383 {
384 AABB_PRIM(node->GetPrimitive(), OPC_CONTACT)
385 }
386 else
387 {
388 _Collide(node->GetPos());
389
390 if(ContactFound()) return;
391
392 _Collide(node->GetNeg());
393 }
394}
395
396///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
397/**
398 * Recursive collision query for quantized AABB trees, without primitive tests.
399 * \param node [in] current collision node
400 */
401///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
402void AABBCollider::_CollideNoPrimitiveTest(const AABBQuantizedNode* node)
403{
404 // Dequantize box
405 const QuantizedAABB& Box = node->mAABB;
406 const Point Center(float(Box.mCenter[0]) * mCenterCoeff.x, float(Box.mCenter[1]) * mCenterCoeff.y, float(Box.mCenter[2]) * mCenterCoeff.z);
407 const Point Extents(float(Box.mExtents[0]) * mExtentsCoeff.x, float(Box.mExtents[1]) * mExtentsCoeff.y, float(Box.mExtents[2]) * mExtentsCoeff.z);
408
409 // Perform AABB-AABB overlap test
410 if(!AABBAABBOverlap(Extents, Center)) return;
411
412 TEST_BOX_IN_AABB(Center, Extents)
413
414 if(node->IsLeaf())
415 {
416 SET_CONTACT(node->GetPrimitive(), OPC_CONTACT)
417 }
418 else
419 {
420 _CollideNoPrimitiveTest(node->GetPos());
421
422 if(ContactFound()) return;
423
424 _CollideNoPrimitiveTest(node->GetNeg());
425 }
426}
427
428///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
429/**
430 * Recursive collision query for no-leaf AABB trees.
431 * \param node [in] current collision node
432 */
433///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
434void AABBCollider::_Collide(const AABBNoLeafNode* node)
435{
436 // Perform AABB-AABB overlap test
437 if(!AABBAABBOverlap(node->mAABB.mExtents, node->mAABB.mCenter)) return;
438
439 TEST_BOX_IN_AABB(node->mAABB.mCenter, node->mAABB.mExtents)
440
441 if(node->HasPosLeaf()) { AABB_PRIM(node->GetPosPrimitive(), OPC_CONTACT) }
442 else _Collide(node->GetPos());
443
444 if(ContactFound()) return;
445
446 if(node->HasNegLeaf()) { AABB_PRIM(node->GetNegPrimitive(), OPC_CONTACT) }
447 else _Collide(node->GetNeg());
448}
449
450///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
451/**
452 * Recursive collision query for no-leaf AABB trees, without primitive tests.
453 * \param node [in] current collision node
454 */
455///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
456void AABBCollider::_CollideNoPrimitiveTest(const AABBNoLeafNode* node)
457{
458 // Perform AABB-AABB overlap test
459 if(!AABBAABBOverlap(node->mAABB.mExtents, node->mAABB.mCenter)) return;
460
461 TEST_BOX_IN_AABB(node->mAABB.mCenter, node->mAABB.mExtents)
462
463 if(node->HasPosLeaf()) { SET_CONTACT(node->GetPosPrimitive(), OPC_CONTACT) }
464 else _CollideNoPrimitiveTest(node->GetPos());
465
466 if(ContactFound()) return;
467
468 if(node->HasNegLeaf()) { SET_CONTACT(node->GetNegPrimitive(), OPC_CONTACT) }
469 else _CollideNoPrimitiveTest(node->GetNeg());
470}
471
472///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
473/**
474 * Recursive collision query for quantized no-leaf AABB trees.
475 * \param node [in] current collision node
476 */
477///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
478void AABBCollider::_Collide(const AABBQuantizedNoLeafNode* node)
479{
480 // Dequantize box
481 const QuantizedAABB& Box = node->mAABB;
482 const Point Center(float(Box.mCenter[0]) * mCenterCoeff.x, float(Box.mCenter[1]) * mCenterCoeff.y, float(Box.mCenter[2]) * mCenterCoeff.z);
483 const Point Extents(float(Box.mExtents[0]) * mExtentsCoeff.x, float(Box.mExtents[1]) * mExtentsCoeff.y, float(Box.mExtents[2]) * mExtentsCoeff.z);
484
485 // Perform AABB-AABB overlap test
486 if(!AABBAABBOverlap(Extents, Center)) return;
487
488 TEST_BOX_IN_AABB(Center, Extents)
489
490 if(node->HasPosLeaf()) { AABB_PRIM(node->GetPosPrimitive(), OPC_CONTACT) }
491 else _Collide(node->GetPos());
492
493 if(ContactFound()) return;
494
495 if(node->HasNegLeaf()) { AABB_PRIM(node->GetNegPrimitive(), OPC_CONTACT) }
496 else _Collide(node->GetNeg());
497}
498
499///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
500/**
501 * Recursive collision query for quantized no-leaf AABB trees, without primitive tests.
502 * \param node [in] current collision node
503 */
504///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
505void AABBCollider::_CollideNoPrimitiveTest(const AABBQuantizedNoLeafNode* node)
506{
507 // Dequantize box
508 const QuantizedAABB& Box = node->mAABB;
509 const Point Center(float(Box.mCenter[0]) * mCenterCoeff.x, float(Box.mCenter[1]) * mCenterCoeff.y, float(Box.mCenter[2]) * mCenterCoeff.z);
510 const Point Extents(float(Box.mExtents[0]) * mExtentsCoeff.x, float(Box.mExtents[1]) * mExtentsCoeff.y, float(Box.mExtents[2]) * mExtentsCoeff.z);
511
512 // Perform AABB-AABB overlap test
513 if(!AABBAABBOverlap(Extents, Center)) return;
514
515 TEST_BOX_IN_AABB(Center, Extents)
516
517 if(node->HasPosLeaf()) { SET_CONTACT(node->GetPosPrimitive(), OPC_CONTACT) }
518 else _CollideNoPrimitiveTest(node->GetPos());
519
520 if(ContactFound()) return;
521
522 if(node->HasNegLeaf()) { SET_CONTACT(node->GetNegPrimitive(), OPC_CONTACT) }
523 else _CollideNoPrimitiveTest(node->GetNeg());
524}
525
526///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
527/**
528 * Recursive collision query for vanilla AABB trees.
529 * \param node [in] current collision node
530 */
531///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
532void AABBCollider::_Collide(const AABBTreeNode* node)
533{
534 // Perform AABB-AABB overlap test
535 Point Center, Extents;
536 node->GetAABB()->GetCenter(Center);
537 node->GetAABB()->GetExtents(Extents);
538 if(!AABBAABBOverlap(Center, Extents)) return;
539
540 if(node->IsLeaf() || AABBContainsBox(Center, Extents))
541 {
542 mFlags |= OPC_CONTACT;
543 mTouchedPrimitives->Add(node->GetPrimitives(), node->GetNbPrimitives());
544 }
545 else
546 {
547 _Collide(node->GetPos());
548 _Collide(node->GetNeg());
549 }
550}
551
552
553
554
555///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
556/**
557 * Constructor.
558 */
559///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
560HybridAABBCollider::HybridAABBCollider()
561{
562}
563
564///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
565/**
566 * Destructor.
567 */
568///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
569HybridAABBCollider::~HybridAABBCollider()
570{
571}
572
573bool HybridAABBCollider::Collide(AABBCache& cache, const CollisionAABB& box, const HybridModel& model)
574{
575 // We don't want primitive tests here!
576 mFlags |= OPC_NO_PRIMITIVE_TESTS;
577
578 // Checkings
579 if(!Setup(&model)) return false;
580
581 // Init collision query
582 if(InitQuery(cache, box)) return true;
583
584 // Special case for 1-leaf trees
585 if(mCurrentModel && mCurrentModel->HasSingleNode())
586 {
587 // Here we're supposed to perform a normal query, except our tree has a single node, i.e. just a few triangles
588 udword Nb = mIMesh->GetNbTriangles();
589
590 // Loop through all triangles
591 for(udword i=0;i<Nb;i++)
592 {
593 AABB_PRIM(i, OPC_CONTACT)
594 }
595 return true;
596 }
597
598 // Override destination array since we're only going to get leaf boxes here
599 mTouchedBoxes.Reset();
600 mTouchedPrimitives = &mTouchedBoxes;
601
602 // Now, do the actual query against leaf boxes
603 if(!model.HasLeafNodes())
604 {
605 if(model.IsQuantized())
606 {
607 const AABBQuantizedNoLeafTree* Tree = (const AABBQuantizedNoLeafTree*)model.GetTree();
608
609 // Setup dequantization coeffs
610 mCenterCoeff = Tree->mCenterCoeff;
611 mExtentsCoeff = Tree->mExtentsCoeff;
612
613 // Perform collision query - we don't want primitive tests here!
614 _CollideNoPrimitiveTest(Tree->GetNodes());
615 }
616 else
617 {
618 const AABBNoLeafTree* Tree = (const AABBNoLeafTree*)model.GetTree();
619
620 // Perform collision query - we don't want primitive tests here!
621 _CollideNoPrimitiveTest(Tree->GetNodes());
622 }
623 }
624 else
625 {
626 if(model.IsQuantized())
627 {
628 const AABBQuantizedTree* Tree = (const AABBQuantizedTree*)model.GetTree();
629
630 // Setup dequantization coeffs
631 mCenterCoeff = Tree->mCenterCoeff;
632 mExtentsCoeff = Tree->mExtentsCoeff;
633
634 // Perform collision query - we don't want primitive tests here!
635 _CollideNoPrimitiveTest(Tree->GetNodes());
636 }
637 else
638 {
639 const AABBCollisionTree* Tree = (const AABBCollisionTree*)model.GetTree();
640
641 // Perform collision query - we don't want primitive tests here!
642 _CollideNoPrimitiveTest(Tree->GetNodes());
643 }
644 }
645
646 // We only have a list of boxes so far
647 if(GetContactStatus())
648 {
649 // Reset contact status, since it currently only reflects collisions with leaf boxes
650 Collider::InitQuery();
651
652 // Change dest container so that we can use built-in overlap tests and get collided primitives
653 cache.TouchedPrimitives.Reset();
654 mTouchedPrimitives = &cache.TouchedPrimitives;
655
656 // Read touched leaf boxes
657 udword Nb = mTouchedBoxes.GetNbEntries();
658 const udword* Touched = mTouchedBoxes.GetEntries();
659
660 const LeafTriangles* LT = model.GetLeafTriangles();
661 const udword* Indices = model.GetIndices();
662
663 // Loop through touched leaves
664 while(Nb--)
665 {
666 const LeafTriangles& CurrentLeaf = LT[*Touched++];
667
668 // Each leaf box has a set of triangles
669 udword NbTris = CurrentLeaf.GetNbTriangles();
670 if(Indices)
671 {
672 const udword* T = &Indices[CurrentLeaf.GetTriangleIndex()];
673
674 // Loop through triangles and test each of them
675 while(NbTris--)
676 {
677 udword TriangleIndex = *T++;
678 AABB_PRIM(TriangleIndex, OPC_CONTACT)
679 }
680 }
681 else
682 {
683 udword BaseIndex = CurrentLeaf.GetTriangleIndex();
684
685 // Loop through triangles and test each of them
686 while(NbTris--)
687 {
688 udword TriangleIndex = BaseIndex++;
689 AABB_PRIM(TriangleIndex, OPC_CONTACT)
690 }
691 }
692 }
693 }
694
695 return true;
696}
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