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source: code/branches/netp6/src/bullet/BulletCollision/CollisionDispatch/btBoxBoxCollisionAlgorithm.cpp @ 5819

Last change on this file since 5819 was 2662, checked in by rgrieder, 16 years ago

Merged presentation branch back to trunk.

  • Property svn:eol-style set to native
File size: 3.2 KB
Line 
1/*
2Bullet Continuous Collision Detection and Physics Library
3Copyright (c) 2003-2006 Erwin Coumans  http://continuousphysics.com/Bullet/
4
5This software is provided 'as-is', without any express or implied warranty.
6In no event will the authors be held liable for any damages arising from the use of this software.
7Permission is granted to anyone to use this software for any purpose,
8including commercial applications, and to alter it and redistribute it freely,
9subject to the following restrictions:
10
111. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
122. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
133. This notice may not be removed or altered from any source distribution.
14*/
15
16#include "btBoxBoxCollisionAlgorithm.h"
17#include "BulletCollision/CollisionDispatch/btCollisionDispatcher.h"
18#include "BulletCollision/CollisionShapes/btBoxShape.h"
19#include "BulletCollision/CollisionDispatch/btCollisionObject.h"
20#include "btBoxBoxDetector.h"
21
22#define USE_PERSISTENT_CONTACTS 1
23
24btBoxBoxCollisionAlgorithm::btBoxBoxCollisionAlgorithm(btPersistentManifold* mf,const btCollisionAlgorithmConstructionInfo& ci,btCollisionObject* obj0,btCollisionObject* obj1)
25: btActivatingCollisionAlgorithm(ci,obj0,obj1),
26m_ownManifold(false),
27m_manifoldPtr(mf)
28{
29        if (!m_manifoldPtr && m_dispatcher->needsCollision(obj0,obj1))
30        {
31                m_manifoldPtr = m_dispatcher->getNewManifold(obj0,obj1);
32                m_ownManifold = true;
33        }
34}
35
36btBoxBoxCollisionAlgorithm::~btBoxBoxCollisionAlgorithm()
37{
38        if (m_ownManifold)
39        {
40                if (m_manifoldPtr)
41                        m_dispatcher->releaseManifold(m_manifoldPtr);
42        }
43}
44
45void btBoxBoxCollisionAlgorithm::processCollision (btCollisionObject* body0,btCollisionObject* body1,const btDispatcherInfo& dispatchInfo,btManifoldResult* resultOut)
46{
47        if (!m_manifoldPtr)
48                return;
49
50        btCollisionObject*      col0 = body0;
51        btCollisionObject*      col1 = body1;
52        btBoxShape* box0 = (btBoxShape*)col0->getCollisionShape();
53        btBoxShape* box1 = (btBoxShape*)col1->getCollisionShape();
54
55
56
57        /// report a contact. internally this will be kept persistent, and contact reduction is done
58        resultOut->setPersistentManifold(m_manifoldPtr);
59#ifndef USE_PERSISTENT_CONTACTS
60        m_manifoldPtr->clearManifold();
61#endif //USE_PERSISTENT_CONTACTS
62
63        btDiscreteCollisionDetectorInterface::ClosestPointInput input;
64        input.m_maximumDistanceSquared = 1e30f;
65        input.m_transformA = body0->getWorldTransform();
66        input.m_transformB = body1->getWorldTransform();
67
68        btBoxBoxDetector detector(box0,box1);
69        detector.getClosestPoints(input,*resultOut,dispatchInfo.m_debugDraw);
70
71#ifdef USE_PERSISTENT_CONTACTS
72        //  refreshContactPoints is only necessary when using persistent contact points. otherwise all points are newly added
73        if (m_ownManifold)
74        {
75                resultOut->refreshContactPoints();
76        }
77#endif //USE_PERSISTENT_CONTACTS
78
79}
80
81btScalar btBoxBoxCollisionAlgorithm::calculateTimeOfImpact(btCollisionObject* /*body0*/,btCollisionObject* /*body1*/,const btDispatcherInfo& /*dispatchInfo*/,btManifoldResult* /*resultOut*/)
82{
83        //not yet
84        return 1.f;
85}
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