public virtual void UpdateActivationState(CollisionWorld collisionWorld, IDispatcher dispatcher)
{
InitUnionFind(collisionWorld.GetCollisionObjectArray().Count);
// put the index into m_controllers into m_tag
{
int index = 0;
ObjectArray<CollisionObject> list = collisionWorld.GetCollisionObjectArray();
foreach(CollisionObject collisionObject in list)
{
collisionObject.SetIslandTag(index);
collisionObject.SetCompanionId(-1);
collisionObject.SetHitFraction(1f);
index++;
}
}
// do the union find
FindUnions(dispatcher, collisionWorld);
}
public virtual void StoreIslandActivationState(CollisionWorld collisionWorld)
{
int index = 0;
ObjectArray<CollisionObject> list = collisionWorld.GetCollisionObjectArray();
foreach (CollisionObject collisionObject in list)
{
if (!collisionObject.IsStaticOrKinematicObject())
{
collisionObject.SetIslandTag(m_unionFind.Find(index));
collisionObject.SetCompanionId(-1);
}
else
{
collisionObject.SetIslandTag(-1);
collisionObject.SetCompanionId(-2);
}
index++;
}
}
public void BuildIslands(IDispatcher dispatcher, CollisionWorld collisionWorld)
{
//BT_PROFILE("islandUnionFindAndQuickSort");
ObjectArray<CollisionObject> collisionObjects = collisionWorld.GetCollisionObjectArray();
m_islandmanifold.Clear();
//we are going to sort the unionfind array, and store the element id in the size
//afterwards, we clean unionfind, to make sure no-one uses it anymore
GetUnionFind().sortIslands();
int numElem = GetUnionFind().GetNumElements();
int endIslandIndex = 1;
//update the sleeping state for bodies, if all are sleeping
for (int startIslandIndex = 0; startIslandIndex < numElem; startIslandIndex = endIslandIndex)
{
int islandId = GetUnionFind().GetElement(startIslandIndex).m_id;
if (BulletGlobals.g_streamWriter != null && debugIslands)
{
BulletGlobals.g_streamWriter.WriteLine(String.Format("buildIslands start[{0}] end[{1}] id[{2}]", startIslandIndex, endIslandIndex, islandId));
}
for (endIslandIndex = startIslandIndex + 1; (endIslandIndex < numElem) && (GetUnionFind().GetElement(endIslandIndex).m_id == islandId); endIslandIndex++)
{
}
//int numSleeping = 0;
bool allSleeping = true;
for (int idx = startIslandIndex; idx < endIslandIndex; idx++)
{
int i = GetUnionFind().GetElement(idx).m_sz;
CollisionObject colObj0 = collisionObjects[i];
if ((colObj0.GetIslandTag() != islandId) && (colObj0.GetIslandTag() != -1))
{
// printf("error in island management\n");
}
Debug.Assert((colObj0.GetIslandTag() == islandId) || (colObj0.GetIslandTag() == -1));
if (colObj0.GetIslandTag() == islandId)
{
if (colObj0.GetActivationState() == ActivationState.ACTIVE_TAG)
{
allSleeping = false;
}
if (colObj0.GetActivationState() == ActivationState.DISABLE_DEACTIVATION)
{
allSleeping = false;
}
}
}
if (allSleeping)
{
for (int idx = startIslandIndex; idx < endIslandIndex; idx++)
{
int i = GetUnionFind().GetElement(idx).m_sz;
CollisionObject colObj0 = collisionObjects[i];
if ((colObj0.GetIslandTag() != islandId) && (colObj0.GetIslandTag() != -1))
{
// printf("error in island management\n");
}
Debug.Assert((colObj0.GetIslandTag() == islandId) || (colObj0.GetIslandTag() == -1));
if (colObj0.GetIslandTag() == islandId)
{
colObj0.SetActivationState(ActivationState.ISLAND_SLEEPING);
}
}
}
else
{
for (int idx = startIslandIndex; idx < endIslandIndex; idx++)
{
int i = GetUnionFind().GetElement(idx).m_sz;
CollisionObject colObj0 = collisionObjects[i];
if ((colObj0.GetIslandTag() != islandId) && (colObj0.GetIslandTag() != -1))
{
// printf("error in island management\n");
}
Debug.Assert((colObj0.GetIslandTag() == islandId) || (colObj0.GetIslandTag() == -1));
if (colObj0.GetIslandTag() == islandId)
{
if (colObj0.GetActivationState() == ActivationState.ISLAND_SLEEPING)
{
colObj0.SetActivationState(ActivationState.WANTS_DEACTIVATION);
colObj0.SetDeactivationTime(0f);
}
}
}
}
}
int maxNumManifolds = dispatcher.GetNumManifolds();
//#definef SPLIT_ISLANDS 1
//#ifdef SPLIT_ISLANDS
//#endif //SPLIT_ISLANDS
for (int i = 0; i < maxNumManifolds; i++)
{
PersistentManifold manifold = dispatcher.GetManifoldByIndexInternal(i);
CollisionObject colObj0 = (CollisionObject)(manifold.GetBody0());
CollisionObject colObj1 = (CollisionObject)(manifold.GetBody1());
///@todo: check sleeping conditions!
if (((colObj0 != null) && colObj0.GetActivationState() != ActivationState.ISLAND_SLEEPING) ||
((colObj1 != null) && colObj1.GetActivationState() != ActivationState.ISLAND_SLEEPING))
{
//kinematic objects don't merge islands, but wake up all connected objects
if (colObj0.IsKinematicObject() && colObj0.GetActivationState() != ActivationState.ISLAND_SLEEPING)
{
colObj1.Activate();
}
if (colObj1.IsKinematicObject() && colObj1.GetActivationState() != ActivationState.ISLAND_SLEEPING)
{
colObj0.Activate();
}
if (m_splitIslands)
{
//filtering for response
if (dispatcher.NeedsResponse(colObj0, colObj1))
{
m_islandmanifold.Add(manifold);
}
}
}
}
}
public void BuildAndProcessIslands(IDispatcher dispatcher, CollisionWorld collisionWorld, IIslandCallback callback)
{
ObjectArray<CollisionObject> collisionObjects = collisionWorld.GetCollisionObjectArray();
BuildIslands(dispatcher,collisionWorld);
int endIslandIndex=1;
int startIslandIndex;
int numElem = GetUnionFind().GetNumElements();
//BT_PROFILE("processIslands");
if(!m_splitIslands)
{
ObjectArray<PersistentManifold> manifolds = dispatcher.GetInternalManifoldPointer();
int maxNumManifolds = dispatcher.GetNumManifolds();
callback.ProcessIsland(collisionObjects,collisionObjects.Count,manifolds,maxNumManifolds, -1);
}
else
{
// Sort manifolds, based on islands
// Sort the vector using predicate and std::sort
//std::sort(islandmanifold.begin(), islandmanifold.end(), btPersistentManifoldSortPredicate);
int numManifolds = m_islandmanifold.Count;
if (numManifolds != 0 && m_islandmanifold[0].GetNumContacts() > 0)
{
int ibreak = 0;
}
//we should do radix sort, it it much faster (O(n) instead of O (n log2(n))
//m_islandmanifold.quickSort(btPersistentManifoldSortPredicate());
//((ObjectArray<PersistentManifold>)m_islandmanifold).Sort();
m_islandmanifold.Sort(new Comparison<PersistentManifold>(PersistentManifoldSortPredicate));
//now process all active islands (sets of manifolds for now)
int startManifoldIndex = 0;
int endManifoldIndex = 1;
//int islandId;
// printf("Start Islands\n");
//traverse the simulation islands, and call the solver, unless all objects are sleeping/deactivated
for ( startIslandIndex=0;startIslandIndex<numElem;startIslandIndex = endIslandIndex)
{
int islandId = GetUnionFind().GetElement(startIslandIndex).m_id;
if (BulletGlobals.g_streamWriter != null && debugIslands)
{
BulletGlobals.g_streamWriter.WriteLine(String.Format("buildAndProcessIslands start[{0}] end[{1}] id[{2}]", startIslandIndex, endIslandIndex, islandId));
}
bool islandSleeping = false;
for (endIslandIndex = startIslandIndex;(endIslandIndex<numElem) && (GetUnionFind().GetElement(endIslandIndex).m_id == islandId);endIslandIndex++)
{
int i = GetUnionFind().GetElement(endIslandIndex).m_sz;
CollisionObject colObj0 = collisionObjects[i];
m_islandBodies.Add(colObj0);
if (!colObj0.IsActive())
{
islandSleeping = true;
//islandSleeping = false;
}
}
//find the accompanying contact manifold for this islandId
int numIslandManifolds = 0;
PersistentManifold startManifold = null;
if (startManifoldIndex<numManifolds)
{
int curIslandId = GetIslandId(m_islandmanifold[startManifoldIndex]);
if (curIslandId == islandId)
{
startManifold = m_islandmanifold[startManifoldIndex];
for (endManifoldIndex = startManifoldIndex+1;(endManifoldIndex<numManifolds) && (islandId == GetIslandId(m_islandmanifold[endManifoldIndex]));endManifoldIndex++)
{
}
/// Process the actual simulation, only if not sleeping/deactivated
numIslandManifolds = endManifoldIndex-startManifoldIndex;
}
}
if (!islandSleeping)
{
// pass shortedned list to callback.
ObjectArray<PersistentManifold> subList = new ObjectArray<PersistentManifold>();
for(int i=0;i<numIslandManifolds;++i)
{
subList.Add(m_islandmanifold[startManifoldIndex+i]);
}
callback.ProcessIsland(m_islandBodies,m_islandBodies.Count,subList,numIslandManifolds, islandId);
// printf("Island callback of size:%d bodies, %d manifolds\n",islandBodies.size(),numIslandManifolds);
}
if (numIslandManifolds != 0)
{
startManifoldIndex = endManifoldIndex;
}
m_islandBodies.Clear();
}
} // else if(!splitIslands)
}