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source: code/branches/revampbigships/src/external/bullet/BulletCollision/NarrowPhaseCollision/btPersistentManifold.cpp @ 9872

Last change on this file since 9872 was 8351, checked in by rgrieder, 14 years ago

Merged kicklib2 branch back to trunk (includes former branches ois_update, mac_osx and kicklib).

Notes for updating

Linux:
You don't need an extra package for CEGUILua and Tolua, it's already shipped with CEGUI.
However you do need to make sure that the OgreRenderer is installed too with CEGUI 0.7 (may be a separate package).
Also, Orxonox now recognises if you install the CgProgramManager (a separate package available on newer Ubuntu on Debian systems).

Windows:
Download the new dependency packages versioned 6.0 and use these. If you have problems with that or if you don't like the in game console problem mentioned below, you can download the new 4.3 version of the packages (only available for Visual Studio 2005/2008).

Key new features:

  • *Support for Mac OS X*
  • Visual Studio 2010 support
  • Bullet library update to 2.77
  • OIS library update to 1.3
  • Support for CEGUI 0.7 —> Support for Arch Linux and even SuSE
  • Improved install target
  • Compiles now with GCC 4.6
  • Ogre Cg Shader plugin activated for Linux if available
  • And of course lots of bug fixes

There are also some regressions:

  • No support for CEGUI 0.5, Ogre 1.4 and boost 1.35 - 1.39 any more
  • In game console is not working in main menu for CEGUI 0.7
  • Tolua (just the C lib, not the application) and CEGUILua libraries are no longer in our repository. —> You will need to get these as well when compiling Orxonox
  • And of course lots of new bugs we don't yet know about
  • Property svn:eol-style set to native
File size: 7.0 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
17#include "btPersistentManifold.h"
18#include "LinearMath/btTransform.h"
19
20
21btScalar                                        gContactBreakingThreshold = btScalar(0.02);
22ContactDestroyedCallback        gContactDestroyedCallback = 0;
23ContactProcessedCallback        gContactProcessedCallback = 0;
24
25
26
27btPersistentManifold::btPersistentManifold()
28:btTypedObject(BT_PERSISTENT_MANIFOLD_TYPE),
29m_body0(0),
30m_body1(0),
31m_cachedPoints (0),
32m_index1a(0)
33{
34}
35
36
37
38
39#ifdef DEBUG_PERSISTENCY
40#include <stdio.h>
41void    btPersistentManifold::DebugPersistency()
42{
43        int i;
44        printf("DebugPersistency : numPoints %d\n",m_cachedPoints);
45        for (i=0;i<m_cachedPoints;i++)
46        {
47                printf("m_pointCache[%d].m_userPersistentData = %x\n",i,m_pointCache[i].m_userPersistentData);
48        }
49}
50#endif //DEBUG_PERSISTENCY
51
52void btPersistentManifold::clearUserCache(btManifoldPoint& pt)
53{
54
55        void* oldPtr = pt.m_userPersistentData;
56        if (oldPtr)
57        {
58#ifdef DEBUG_PERSISTENCY
59                int i;
60                int occurance = 0;
61                for (i=0;i<m_cachedPoints;i++)
62                {
63                        if (m_pointCache[i].m_userPersistentData == oldPtr)
64                        {
65                                occurance++;
66                                if (occurance>1)
67                                        printf("error in clearUserCache\n");
68                        }
69                }
70                btAssert(occurance<=0);
71#endif //DEBUG_PERSISTENCY
72
73                if (pt.m_userPersistentData && gContactDestroyedCallback)
74                {
75                        (*gContactDestroyedCallback)(pt.m_userPersistentData);
76                        pt.m_userPersistentData = 0;
77                }
78               
79#ifdef DEBUG_PERSISTENCY
80                DebugPersistency();
81#endif
82        }
83
84       
85}
86
87
88int btPersistentManifold::sortCachedPoints(const btManifoldPoint& pt) 
89{
90
91                //calculate 4 possible cases areas, and take biggest area
92                //also need to keep 'deepest'
93               
94                int maxPenetrationIndex = -1;
95#define KEEP_DEEPEST_POINT 1
96#ifdef KEEP_DEEPEST_POINT
97                btScalar maxPenetration = pt.getDistance();
98                for (int i=0;i<4;i++)
99                {
100                        if (m_pointCache[i].getDistance() < maxPenetration)
101                        {
102                                maxPenetrationIndex = i;
103                                maxPenetration = m_pointCache[i].getDistance();
104                        }
105                }
106#endif //KEEP_DEEPEST_POINT
107               
108                btScalar res0(btScalar(0.)),res1(btScalar(0.)),res2(btScalar(0.)),res3(btScalar(0.));
109                if (maxPenetrationIndex != 0)
110                {
111                        btVector3 a0 = pt.m_localPointA-m_pointCache[1].m_localPointA;
112                        btVector3 b0 = m_pointCache[3].m_localPointA-m_pointCache[2].m_localPointA;
113                        btVector3 cross = a0.cross(b0);
114                        res0 = cross.length2();
115                }
116                if (maxPenetrationIndex != 1)
117                {
118                        btVector3 a1 = pt.m_localPointA-m_pointCache[0].m_localPointA;
119                        btVector3 b1 = m_pointCache[3].m_localPointA-m_pointCache[2].m_localPointA;
120                        btVector3 cross = a1.cross(b1);
121                        res1 = cross.length2();
122                }
123
124                if (maxPenetrationIndex != 2)
125                {
126                        btVector3 a2 = pt.m_localPointA-m_pointCache[0].m_localPointA;
127                        btVector3 b2 = m_pointCache[3].m_localPointA-m_pointCache[1].m_localPointA;
128                        btVector3 cross = a2.cross(b2);
129                        res2 = cross.length2();
130                }
131
132                if (maxPenetrationIndex != 3)
133                {
134                        btVector3 a3 = pt.m_localPointA-m_pointCache[0].m_localPointA;
135                        btVector3 b3 = m_pointCache[2].m_localPointA-m_pointCache[1].m_localPointA;
136                        btVector3 cross = a3.cross(b3);
137                        res3 = cross.length2();
138                }
139
140                btVector4 maxvec(res0,res1,res2,res3);
141                int biggestarea = maxvec.closestAxis4();
142                return biggestarea;
143}
144
145
146int btPersistentManifold::getCacheEntry(const btManifoldPoint& newPoint) const
147{
148        btScalar shortestDist =  getContactBreakingThreshold() * getContactBreakingThreshold();
149        int size = getNumContacts();
150        int nearestPoint = -1;
151        for( int i = 0; i < size; i++ )
152        {
153                const btManifoldPoint &mp = m_pointCache[i];
154
155                btVector3 diffA =  mp.m_localPointA- newPoint.m_localPointA;
156                const btScalar distToManiPoint = diffA.dot(diffA);
157                if( distToManiPoint < shortestDist )
158                {
159                        shortestDist = distToManiPoint;
160                        nearestPoint = i;
161                }
162        }
163        return nearestPoint;
164}
165
166int btPersistentManifold::addManifoldPoint(const btManifoldPoint& newPoint)
167{
168        btAssert(validContactDistance(newPoint));
169
170        int insertIndex = getNumContacts();
171        if (insertIndex == MANIFOLD_CACHE_SIZE)
172        {
173#if MANIFOLD_CACHE_SIZE >= 4
174                //sort cache so best points come first, based on area
175                insertIndex = sortCachedPoints(newPoint);
176#else
177                insertIndex = 0;
178#endif
179                clearUserCache(m_pointCache[insertIndex]);
180               
181        } else
182        {
183                m_cachedPoints++;
184
185               
186        }
187        if (insertIndex<0)
188                insertIndex=0;
189
190        btAssert(m_pointCache[insertIndex].m_userPersistentData==0);
191        m_pointCache[insertIndex] = newPoint;
192        return insertIndex;
193}
194
195btScalar        btPersistentManifold::getContactBreakingThreshold() const
196{
197        return m_contactBreakingThreshold;
198}
199
200
201
202void btPersistentManifold::refreshContactPoints(const btTransform& trA,const btTransform& trB)
203{
204        int i;
205#ifdef DEBUG_PERSISTENCY
206        printf("refreshContactPoints posA = (%f,%f,%f) posB = (%f,%f,%f)\n",
207                trA.getOrigin().getX(),
208                trA.getOrigin().getY(),
209                trA.getOrigin().getZ(),
210                trB.getOrigin().getX(),
211                trB.getOrigin().getY(),
212                trB.getOrigin().getZ());
213#endif //DEBUG_PERSISTENCY
214        /// first refresh worldspace positions and distance
215        for (i=getNumContacts()-1;i>=0;i--)
216        {
217                btManifoldPoint &manifoldPoint = m_pointCache[i];
218                manifoldPoint.m_positionWorldOnA = trA( manifoldPoint.m_localPointA );
219                manifoldPoint.m_positionWorldOnB = trB( manifoldPoint.m_localPointB );
220                manifoldPoint.m_distance1 = (manifoldPoint.m_positionWorldOnA -  manifoldPoint.m_positionWorldOnB).dot(manifoldPoint.m_normalWorldOnB);
221                manifoldPoint.m_lifeTime++;
222        }
223
224        /// then
225        btScalar distance2d;
226        btVector3 projectedDifference,projectedPoint;
227        for (i=getNumContacts()-1;i>=0;i--)
228        {
229               
230                btManifoldPoint &manifoldPoint = m_pointCache[i];
231                //contact becomes invalid when signed distance exceeds margin (projected on contactnormal direction)
232                if (!validContactDistance(manifoldPoint))
233                {
234                        removeContactPoint(i);
235                } else
236                {
237                        //contact also becomes invalid when relative movement orthogonal to normal exceeds margin
238                        projectedPoint = manifoldPoint.m_positionWorldOnA - manifoldPoint.m_normalWorldOnB * manifoldPoint.m_distance1;
239                        projectedDifference = manifoldPoint.m_positionWorldOnB - projectedPoint;
240                        distance2d = projectedDifference.dot(projectedDifference);
241                        if (distance2d  > getContactBreakingThreshold()*getContactBreakingThreshold() )
242                        {
243                                removeContactPoint(i);
244                        } else
245                        {
246                                //contact point processed callback
247                                if (gContactProcessedCallback)
248                                        (*gContactProcessedCallback)(manifoldPoint,m_body0,m_body1);
249                        }
250                }
251        }
252#ifdef DEBUG_PERSISTENCY
253        DebugPersistency();
254#endif //
255}
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