// This one is only used for validation.
internal bool TestOverlap(Proxy p1, Proxy p2)
{
for (int axis = 0; axis < 2; ++axis)
{
Bound[] bounds = _bounds[axis];
Box2DXDebug.Assert(p1.LowerBounds[axis] < 2 * _proxyCount);
Box2DXDebug.Assert(p1.UpperBounds[axis] < 2 * _proxyCount);
Box2DXDebug.Assert(p2.LowerBounds[axis] < 2 * _proxyCount);
Box2DXDebug.Assert(p2.UpperBounds[axis] < 2 * _proxyCount);
if (bounds[p1.LowerBounds[axis]].Value > bounds[p2.UpperBounds[axis]].Value)
return false;
if (bounds[p1.UpperBounds[axis]].Value < bounds[p2.LowerBounds[axis]].Value)
return false;
}
return true;
}
internal bool TestOverlap(BoundValues b, Proxy p)
{
for (int axis = 0; axis < 2; ++axis)
{
Bound[] bounds = _bounds[axis];
Box2DXDebug.Assert(p.LowerBounds[axis] < 2 * _proxyCount);
Box2DXDebug.Assert(p.UpperBounds[axis] < 2 * _proxyCount);
if (b.LowerValues[axis] > bounds[p.UpperBounds[axis]].Value)
return false;
if (b.UpperValues[axis] < bounds[p.LowerBounds[axis]].Value)
return false;
}
return true;
}
public void AddProxyResult(ushort proxyId, Proxy proxy, int maxCount, SortKeyFunc sortKey)
{
float key = sortKey(proxy.UserData);
//Filter proxies on positive keys
if (key < 0)
return;
//Merge the new key into the sorted list.
//float32* p = std::lower_bound(m_querySortKeys,m_querySortKeys+m_queryResultCount,key);
float[] querySortKeysPtr = _querySortKeys;
int ip = 0;
float p = querySortKeysPtr[ip];
while (p < key && ip < _queryResultCount)
{
p = querySortKeysPtr[ip];
ip++;
}
int i = ip;
if (maxCount == _queryResultCount && i == _queryResultCount)
return;
if (maxCount == _queryResultCount)
_queryResultCount--;
//std::copy_backward
for (int j = _queryResultCount + 1; j > i; --j)
{
_querySortKeys[j] = _querySortKeys[j - 1];
_queryResults[j] = _queryResults[j - 1];
}
_querySortKeys[i] = key;
_queryResults[i] = proxyId;
_queryResultCount++;
}
public BroadPhase(AABB worldAABB, PairCallback callback)
{
_pairManager = new PairManager();
_pairManager.Initialize(this, callback);
Box2DXDebug.Assert(worldAABB.IsValid);
_worldAABB = worldAABB;
_proxyCount = 0;
Vec2 d = worldAABB.UpperBound - worldAABB.LowerBound;
_quantizationFactor.X = (float)BROADPHASE_MAX / d.X;
_quantizationFactor.Y = (float)BROADPHASE_MAX / d.Y;
for (ushort i = 0; i < Settings.MaxProxies - 1; ++i)
{
_proxyPool[i] = new Proxy();
_proxyPool[i].Next = (ushort)(i + 1);
_proxyPool[i].TimeStamp = 0;
_proxyPool[i].OverlapCount = BroadPhase.Invalid;
_proxyPool[i].UserData = null;
}
_proxyPool[Settings.MaxProxies - 1] = new Proxy();
_proxyPool[Settings.MaxProxies - 1].Next = PairManager.NullProxy;
_proxyPool[Settings.MaxProxies - 1].TimeStamp = 0;
_proxyPool[Settings.MaxProxies - 1].OverlapCount = BroadPhase.Invalid;
_proxyPool[Settings.MaxProxies - 1].UserData = null;
_freeProxy = 0;
_timeStamp = 1;
_queryResultCount = 0;
for (int i = 0; i < 2; i++)
{
_bounds[i] = new Bound[(2 * Settings.MaxProxies)];
}
int bCount = 2 * Settings.MaxProxies;
for (int j = 0; j < 2; j++)
for (int k = 0; k < bCount; k++)
_bounds[j][k] = new Bound();
}
public unsafe void AddProxyResult(ushort proxyId, Proxy proxy, int maxCount, SortKeyFunc sortKey)
{
float key = sortKey(proxy.UserData);
//Filter proxies on positive keys
if (key < 0)
return;
//Merge the new key into the sorted list.
//float32* p = std::lower_bound(m_querySortKeys,m_querySortKeys+m_queryResultCount,key);
fixed (float* querySortKeysPtr = _querySortKeys)
{
float* p = querySortKeysPtr;
while (*p < key && p < &querySortKeysPtr[_queryResultCount])
p++;
int i = (int)(p - &querySortKeysPtr[0]);
if (maxCount == _queryResultCount && i == _queryResultCount)
return;
if (maxCount == _queryResultCount)
_queryResultCount--;
//std::copy_backward
for (int j = _queryResultCount + 1; j > i; --j)
{
_querySortKeys[j] = _querySortKeys[j - 1];
_queryResults[j] = _queryResults[j - 1];
}
_querySortKeys[i] = key;
_queryResults[i] = proxyId;
_queryResultCount++;
}
}
int QuerySegment(Segment segment, object[] userData, int maxCount, SortKeyFunc sortKey)
{
float maxLambda = 1;
float dx = (segment.P2.X - segment.P1.X) * _quantizationFactor.X;
float dy = (segment.P2.Y - segment.P1.Y) * _quantizationFactor.Y;
int sx = dx < -Settings.FLT_EPSILON ? -1 : (dx > Settings.FLT_EPSILON ? 1 : 0);
int sy = dy < -Settings.FLT_EPSILON ? -1 : (dy > Settings.FLT_EPSILON ? 1 : 0);
Box2DXDebug.Assert(sx != 0 || sy != 0);
float p1x = (segment.P1.X - _worldAABB.LowerBound.X) * _quantizationFactor.X;
float p1y = (segment.P1.Y - _worldAABB.LowerBound.Y) * _quantizationFactor.Y;
#if ALLOWUNSAFE
ushort *startValues = stackalloc ushort[2];
ushort *startValues2 = stackalloc ushort[2];
#else
ushort[] startValues = new ushort[2];
ushort[] startValues2 = new ushort[2];
#endif
int xIndex;
int yIndex;
ushort proxyId;
Proxy proxy;
// TODO_ERIN implement fast float to ushort conversion.
startValues[0] = (ushort)((ushort)(p1x) & (BROADPHASE_MAX - 1));
startValues2[0] = (ushort)((ushort)(p1x) | 1);
startValues[1] = (ushort)((ushort)(p1y) & (BROADPHASE_MAX - 1));
startValues2[1] = (ushort)((ushort)(p1y) | 1);
//First deal with all the proxies that contain segment.p1
int lowerIndex;
int upperIndex;
Query(out lowerIndex, out upperIndex, startValues[0], startValues2[0], _bounds[0], 2 * _proxyCount, 0);
if (sx >= 0)
{
xIndex = upperIndex - 1;
}
else
{
xIndex = lowerIndex;
}
Query(out lowerIndex, out upperIndex, startValues[1], startValues2[1], _bounds[1], 2 * _proxyCount, 1);
if (sy >= 0)
{
yIndex = upperIndex - 1;
}
else
{
yIndex = lowerIndex;
}
//If we are using sortKey, then sort what we have so far, filtering negative keys
if (sortKey != null)
{
//Fill keys
for (int j = 0; j < _queryResultCount; j++)
{
_querySortKeys[j] = sortKey(_proxyPool[_queryResults[j]].UserData);
}
//Bubble sort keys
//Sorting negative values to the top, so we can easily remove them
int i = 0;
while (i < _queryResultCount - 1)
{
float a = _querySortKeys[i];
float b = _querySortKeys[i + 1];
if ((a < 0) ? (b >= 0) : (a > b && b >= 0))
{
_querySortKeys[i + 1] = a;
_querySortKeys[i] = b;
ushort tempValue = _queryResults[i + 1];
_queryResults[i + 1] = _queryResults[i];
_queryResults[i] = tempValue;
i--;
if (i == -1)
{
i = 1;
}
}
else
{
i++;
}
}
//Skim off negative values
while (_queryResultCount > 0 && _querySortKeys[_queryResultCount - 1] < 0)
{
_queryResultCount--;
}
}
//Now work through the rest of the segment
for (; ;)
{
float xProgress = 0;
float yProgress = 0;
if (xIndex < 0 || xIndex >= _proxyCount * 2)
{
break;
}
if (yIndex < 0 || yIndex >= _proxyCount * 2)
{
break;
}
if (sx != 0)
{
//Move on to the next bound
if (sx > 0)
{
xIndex++;
if (xIndex == _proxyCount * 2)
{
break;
}
}
else
{
xIndex--;
if (xIndex < 0)
{
break;
}
}
xProgress = (_bounds[0][xIndex].Value - p1x) / dx;
}
if (sy != 0)
{
//Move on to the next bound
if (sy > 0)
{
yIndex++;
if (yIndex == _proxyCount * 2)
{
break;
}
}
else
{
yIndex--;
if (yIndex < 0)
{
break;
}
}
yProgress = (_bounds[1][yIndex].Value - p1y) / dy;
}
for (; ;)
{
if (sy == 0 || (sx != 0 && xProgress < yProgress))
{
if (xProgress > maxLambda)
{
break;
}
//Check that we are entering a proxy, not leaving
if (sx > 0 ? _bounds[0][xIndex].IsLower : _bounds[0][xIndex].IsUpper)
{
//Check the other axis of the proxy
proxyId = _bounds[0][xIndex].ProxyId;
proxy = _proxyPool[proxyId];
if (sy >= 0)
{
if (proxy.LowerBounds[1] <= yIndex - 1 && proxy.UpperBounds[1] >= yIndex)
{
//Add the proxy
if (sortKey != null)
{
AddProxyResult(proxyId, proxy, maxCount, sortKey);
}
else
{
_queryResults[_queryResultCount] = proxyId;
++_queryResultCount;
}
}
}
else
{
if (proxy.LowerBounds[1] <= yIndex && proxy.UpperBounds[1] >= yIndex + 1)
{
//Add the proxy
if (sortKey != null)
{
AddProxyResult(proxyId, proxy, maxCount, sortKey);
}
else
{
_queryResults[_queryResultCount] = proxyId;
++_queryResultCount;
}
}
}
}
//Early out
if (sortKey != null && _queryResultCount == maxCount && _queryResultCount > 0 && xProgress > _querySortKeys[_queryResultCount - 1])
{
break;
}
//Move on to the next bound
if (sx > 0)
{
xIndex++;
if (xIndex == _proxyCount * 2)
{
break;
}
}
else
{
xIndex--;
if (xIndex < 0)
{
break;
}
}
xProgress = (_bounds[0][xIndex].Value - p1x) / dx;
}
else
{
if (yProgress > maxLambda)
{
break;
}
//Check that we are entering a proxy, not leaving
if (sy > 0 ? _bounds[1][yIndex].IsLower : _bounds[1][yIndex].IsUpper)
{
//Check the other axis of the proxy
proxyId = _bounds[1][yIndex].ProxyId;
proxy = _proxyPool[proxyId];
if (sx >= 0)
{
if (proxy.LowerBounds[0] <= xIndex - 1 && proxy.UpperBounds[0] >= xIndex)
{
//Add the proxy
if (sortKey != null)
{
AddProxyResult(proxyId, proxy, maxCount, sortKey);
}
else
{
_queryResults[_queryResultCount] = proxyId;
++_queryResultCount;
}
}
}
else
{
if (proxy.LowerBounds[0] <= xIndex && proxy.UpperBounds[0] >= xIndex + 1)
{
//Add the proxy
if (sortKey != null)
{
AddProxyResult(proxyId, proxy, maxCount, sortKey);
}
else
{
_queryResults[_queryResultCount] = proxyId;
++_queryResultCount;
}
}
}
}
//Early out
if (sortKey != null && _queryResultCount == maxCount && _queryResultCount > 0 && yProgress > _querySortKeys[_queryResultCount - 1])
{
break;
}
//Move on to the next bound
if (sy > 0)
{
yIndex++;
if (yIndex == _proxyCount * 2)
{
break;
}
}
else
{
yIndex--;
if (yIndex < 0)
{
break;
}
}
yProgress = (_bounds[1][yIndex].Value - p1y) / dy;
}
}
break;
}
int count = 0;
for (int i = 0; i < _queryResultCount && count < maxCount; ++i, ++count)
{
Box2DXDebug.Assert(_queryResults[i] < Settings.MaxProxies);
Proxy proxy_ = _proxyPool[_queryResults[i]];
Box2DXDebug.Assert(proxy_.IsValid);
userData[i] = proxy_.UserData;
}
// Prepare for next query.
_queryResultCount = 0;
IncrementTimeStamp();
return(count);
}
// Call MoveProxy as many times as you like, then when you are done
// call Commit to finalized the proxy pairs (for your time step).
public void MoveProxy(int proxyId, AABB aabb)
{
if (proxyId == PairManager.NullProxy || Settings.MaxProxies <= proxyId)
{
Box2DXDebug.Assert(false);
return;
}
if (aabb.IsValid == false)
{
Box2DXDebug.Assert(false);
return;
}
int boundCount = 2 * _proxyCount;
Proxy proxy = _proxyPool[proxyId];
// Get new bound values
BoundValues newValues = new BoundValues();;
ComputeBounds(out newValues.LowerValues, out newValues.UpperValues, aabb);
// Get old bound values
BoundValues oldValues = new BoundValues();
for (int axis = 0; axis < 2; ++axis)
{
oldValues.LowerValues[axis] = _bounds[axis][proxy.LowerBounds[axis]].Value;
oldValues.UpperValues[axis] = _bounds[axis][proxy.UpperBounds[axis]].Value;
}
for (int axis = 0; axis < 2; ++axis)
{
Bound[] bounds = _bounds[axis];
int lowerIndex = proxy.LowerBounds[axis];
int upperIndex = proxy.UpperBounds[axis];
ushort lowerValue = newValues.LowerValues[axis];
ushort upperValue = newValues.UpperValues[axis];
int deltaLower = lowerValue - bounds[lowerIndex].Value;
int deltaUpper = upperValue - bounds[upperIndex].Value;
bounds[lowerIndex].Value = lowerValue;
bounds[upperIndex].Value = upperValue;
//
// Expanding adds overlaps
//
// Should we move the lower bound down?
if (deltaLower < 0)
{
int index = lowerIndex;
while (index > 0 && lowerValue < bounds[index - 1].Value)
{
Bound bound = bounds[index];
Bound prevBound = bounds[index - 1];
int prevProxyId = prevBound.ProxyId;
Proxy prevProxy = _proxyPool[prevBound.ProxyId];
++prevBound.StabbingCount;
if (prevBound.IsUpper == true)
{
if (TestOverlap(newValues, prevProxy))
{
_pairManager.AddBufferedPair(proxyId, prevProxyId);
}
++prevProxy.UpperBounds[axis];
++bound.StabbingCount;
}
else
{
++prevProxy.LowerBounds[axis];
--bound.StabbingCount;
}
--proxy.LowerBounds[axis];
Common.Math.Swap <Bound>(ref bounds[index], ref bounds[index - 1]);
--index;
}
}
// Should we move the upper bound up?
if (deltaUpper > 0)
{
int index = upperIndex;
while (index < boundCount - 1 && bounds[index + 1].Value <= upperValue)
{
Bound bound = bounds[index];
Bound nextBound = bounds[index + 1];
int nextProxyId = nextBound.ProxyId;
Proxy nextProxy = _proxyPool[nextProxyId];
++nextBound.StabbingCount;
if (nextBound.IsLower == true)
{
if (TestOverlap(newValues, nextProxy))
{
_pairManager.AddBufferedPair(proxyId, nextProxyId);
}
--nextProxy.LowerBounds[axis];
++bound.StabbingCount;
}
else
{
--nextProxy.UpperBounds[axis];
--bound.StabbingCount;
}
++proxy.UpperBounds[axis];
Common.Math.Swap <Bound>(ref bounds[index], ref bounds[index + 1]);
++index;
}
}
//
// Shrinking removes overlaps
//
// Should we move the lower bound up?
if (deltaLower > 0)
{
int index = lowerIndex;
while (index < boundCount - 1 && bounds[index + 1].Value <= lowerValue)
{
Bound bound = bounds[index];
Bound nextBound = bounds[index + 1];
int nextProxyId = nextBound.ProxyId;
Proxy nextProxy = _proxyPool[nextProxyId];
--nextBound.StabbingCount;
if (nextBound.IsUpper)
{
if (TestOverlap(oldValues, nextProxy))
{
_pairManager.RemoveBufferedPair(proxyId, nextProxyId);
}
--nextProxy.UpperBounds[axis];
--bound.StabbingCount;
}
else
{
--nextProxy.LowerBounds[axis];
++bound.StabbingCount;
}
++proxy.LowerBounds[axis];
Common.Math.Swap <Bound>(ref bounds[index], ref bounds[index + 1]);
++index;
}
}
// Should we move the upper bound down?
if (deltaUpper < 0)
{
int index = upperIndex;
while (index > 0 && upperValue < bounds[index - 1].Value)
{
Bound bound = bounds[index];
Bound prevBound = bounds[index - 1];
int prevProxyId = prevBound.ProxyId;
Proxy prevProxy = _proxyPool[prevProxyId];
--prevBound.StabbingCount;
if (prevBound.IsLower == true)
{
if (TestOverlap(oldValues, prevProxy))
{
_pairManager.RemoveBufferedPair(proxyId, prevProxyId);
}
++prevProxy.LowerBounds[axis];
--bound.StabbingCount;
}
else
{
++prevProxy.UpperBounds[axis];
++bound.StabbingCount;
}
--proxy.UpperBounds[axis];
Common.Math.Swap <Bound>(ref bounds[index], ref bounds[index - 1]);
--index;
}
}
}
if (IsValidate)
{
Validate();
}
}
public void DestroyProxy(int proxyId)
{
Box2DXDebug.Assert(0 < _proxyCount && _proxyCount <= Settings.MaxProxies);
Proxy proxy = _proxyPool[proxyId];
Box2DXDebug.Assert(proxy.IsValid);
int boundCount = 2 * _proxyCount;
for (int axis = 0; axis < 2; ++axis)
{
Bound[] bounds = _bounds[axis];
int lowerIndex = proxy.LowerBounds[axis];
int upperIndex = proxy.UpperBounds[axis];
ushort lowerValue = bounds[lowerIndex].Value;
ushort upperValue = bounds[upperIndex].Value;
#warning "Check this"
//memmove(bounds + lowerIndex, bounds + lowerIndex + 1, (upperIndex - lowerIndex - 1) * sizeof(b2Bound));
Bound[] tmp = new Bound[upperIndex - lowerIndex - 1];
for (int i = 0; i < (upperIndex - lowerIndex - 1); i++)
{
tmp[i] = bounds[lowerIndex + 1 + i].Clone();
}
for (int i = 0; i < (upperIndex - lowerIndex - 1); i++)
{
bounds[lowerIndex + i] = tmp[i];
}
//memmove(bounds + upperIndex - 1, bounds + upperIndex + 1, (boundCount - upperIndex - 1) * sizeof(b2Bound));
tmp = new Bound[boundCount - upperIndex - 1];
for (int i = 0; i < (boundCount - upperIndex - 1); i++)
{
tmp[i] = bounds[upperIndex + 1 + i].Clone();
}
for (int i = 0; i < (boundCount - upperIndex - 1); i++)
{
bounds[upperIndex - 1 + i] = tmp[i];
}
// Fix bound indices.
for (int index = lowerIndex; index < boundCount - 2; ++index)
{
Proxy proxy_ = _proxyPool[bounds[index].ProxyId];
if (bounds[index].IsLower)
{
proxy_.LowerBounds[axis] = (ushort)index;
}
else
{
proxy_.UpperBounds[axis] = (ushort)index;
}
}
// Fix stabbing count.
for (int index = lowerIndex; index < upperIndex - 1; ++index)
{
--bounds[index].StabbingCount;
}
// Query for pairs to be removed. lowerIndex and upperIndex are not needed.
Query(out lowerIndex, out upperIndex, lowerValue, upperValue, bounds, boundCount - 2, axis);
}
Box2DXDebug.Assert(_queryResultCount < Settings.MaxProxies);
for (int i = 0; i < _queryResultCount; ++i)
{
Box2DXDebug.Assert(_proxyPool[_queryResults[i]].IsValid);
_pairManager.RemoveBufferedPair(proxyId, _queryResults[i]);
}
_pairManager.Commit();
// Prepare for next query.
_queryResultCount = 0;
IncrementTimeStamp();
// Return the proxy to the pool.
proxy.UserData = null;
proxy.OverlapCount = BroadPhase.Invalid;
proxy.LowerBounds[0] = BroadPhase.Invalid;
proxy.LowerBounds[1] = BroadPhase.Invalid;
proxy.UpperBounds[0] = BroadPhase.Invalid;
proxy.UpperBounds[1] = BroadPhase.Invalid;
proxy.Next = _freeProxy;
_freeProxy = (ushort)proxyId;
--_proxyCount;
if (IsValidate)
{
Validate();
}
}
// Create and destroy proxies. These call Flush first.
public ushort CreateProxy(AABB aabb, object userData)
{
Box2DXDebug.Assert(_proxyCount < Settings.MaxProxies);
Box2DXDebug.Assert(_freeProxy != PairManager.NullProxy);
ushort proxyId = _freeProxy;
Proxy proxy = _proxyPool[proxyId];
_freeProxy = proxy.Next;
proxy.OverlapCount = 0;
proxy.UserData = userData;
int boundCount = 2 * _proxyCount;
ushort[] lowerValues = new ushort[2], upperValues = new ushort[2];
ComputeBounds(out lowerValues, out upperValues, aabb);
for (int axis = 0; axis < 2; ++axis)
{
Bound[] bounds = _bounds[axis];
int lowerIndex, upperIndex;
Query(out lowerIndex, out upperIndex, lowerValues[axis], upperValues[axis], bounds, boundCount, axis);
#warning "Check this"
//memmove(bounds + upperIndex + 2, bounds + upperIndex, (boundCount - upperIndex) * sizeof(b2Bound));
Bound[] tmp = new Bound[boundCount - upperIndex];
for (int i = 0; i < (boundCount - upperIndex); i++)
{
tmp[i] = bounds[upperIndex + i].Clone();
}
for (int i = 0; i < (boundCount - upperIndex); i++)
{
bounds[upperIndex + 2 + i] = tmp[i];
}
//memmove(bounds + lowerIndex + 1, bounds + lowerIndex, (upperIndex - lowerIndex) * sizeof(b2Bound));
tmp = new Bound[upperIndex - lowerIndex];
for (int i = 0; i < (upperIndex - lowerIndex); i++)
{
tmp[i] = bounds[lowerIndex + i].Clone();
}
for (int i = 0; i < (upperIndex - lowerIndex); i++)
{
bounds[lowerIndex + 1 + i] = tmp[i];
}
// The upper index has increased because of the lower bound insertion.
++upperIndex;
// Copy in the new bounds.
bounds[lowerIndex].Value = lowerValues[axis];
bounds[lowerIndex].ProxyId = proxyId;
bounds[upperIndex].Value = upperValues[axis];
bounds[upperIndex].ProxyId = proxyId;
bounds[lowerIndex].StabbingCount = lowerIndex == 0 ? (ushort)0 : bounds[lowerIndex - 1].StabbingCount;
bounds[upperIndex].StabbingCount = bounds[upperIndex - 1].StabbingCount;
// Adjust the stabbing count between the new bounds.
for (int index = lowerIndex; index < upperIndex; ++index)
{
++bounds[index].StabbingCount;
}
// Adjust the all the affected bound indices.
for (int index = lowerIndex; index < boundCount + 2; ++index)
{
Proxy proxy_ = _proxyPool[bounds[index].ProxyId];
if (bounds[index].IsLower)
{
proxy_.LowerBounds[axis] = (ushort)index;
}
else
{
proxy_.UpperBounds[axis] = (ushort)index;
}
}
}
++_proxyCount;
Box2DXDebug.Assert(_queryResultCount < Settings.MaxProxies);
// Create pairs if the AABB is in range.
for (int i = 0; i < _queryResultCount; ++i)
{
Box2DXDebug.Assert(_queryResults[i] < Settings.MaxProxies);
Box2DXDebug.Assert(_proxyPool[_queryResults[i]].IsValid);
_pairManager.AddBufferedPair(proxyId, _queryResults[i]);
}
_pairManager.Commit();
if (IsValidate)
{
Validate();
}
// Prepare for next query.
_queryResultCount = 0;
IncrementTimeStamp();
return(proxyId);
}