internal void Simulate(float deltaTime)
{
if (collisionWorld == null)
{
return;
}
simulationArgs.DeltaTime = deltaTime;
OnSimulationBegin(simulationArgs);
simulationProfilingState.Begin();
if (discreteDynamicsWorld != null)
{
discreteDynamicsWorld.StepSimulation(deltaTime, MaxSubSteps, FixedTimeStep);
}
else
{
collisionWorld.PerformDiscreteCollisionDetection();
}
simulationProfilingState.End();
OnSimulationEnd(simulationArgs);
}
public GcProfiling()
{
collectionCountState = Profiler.New(GcCollectionCountKey);
gen0Count = GC.CollectionCount(0);
gen1Count = GC.CollectionCount(1);
gen2Count = GC.CollectionCount(2);
collectionCountState.Begin(gen0Count, gen1Count, gen2Count);
gcMemoryState = Profiler.New(GcMemoryKey);
memoryPeak = lastFrameMemory = GC.GetTotalMemory(false);
gcMemoryState.Begin(lastFrameMemory, lastFrameMemory, memoryPeak);
}
/*
* private static void DrawDebugCompound(ref Matrix viewProj, CompoundColliderShape compound, PhysicsElement element)
* {
* for (var i = 0; i < compound.Count; i++)
* {
* var subShape = compound[i];
* switch (subShape.Type)
* {
* case ColliderShapeTypes.StaticPlane:
* continue;
* case ColliderShapeTypes.Compound:
* DrawDebugCompound(ref viewProj, (CompoundColliderShape)compound[i], element);
* break;
*
* default:
* {
* var physTrans = Matrix.Multiply(subShape.PositiveCenterMatrix, element.Collider.PhysicsWorldTransform);
*
* //must account collider shape scaling
* Matrix worldTrans;
* Matrix.Multiply(ref subShape.DebugPrimitiveScaling, ref physTrans, out worldTrans);
*
* Simulation.DebugEffect.WorldViewProj = worldTrans * viewProj;
* Simulation.DebugEffect.Color = element.Collider.IsActive ? Color.Green : Color.Red;
* Simulation.DebugEffect.UseUv = subShape.Type != ColliderShapeTypes.ConvexHull;
*
* Simulation.DebugEffect.Apply();
*
* subShape.DebugPrimitive.Draw();
* }
* break;
* }
* }
* }
*
* private void DebugShapesDraw(RenderContext context)
* {
* if ( !Simulation.CreateDebugPrimitives ||
* !Simulation.RenderDebugPrimitives ||
* Simulation.DebugGraphicsDevice == null ||
* Simulation.DebugEffect == null)
* return;
*
* Matrix viewProj;
* if (context.Parameters.ContainsKey(TransformationKeys.View) && context.Parameters.ContainsKey(TransformationKeys.Projection))
* {
* viewProj = context.Parameters.Get(TransformationKeys.View) * context.Parameters.Get(TransformationKeys.Projection);
* }
* else
* {
* return;
* }
*
* var rasterizers = Simulation.DebugGraphicsDevice.RasterizerStates;
* Simulation.DebugGraphicsDevice.SetRasterizerState(rasterizers.CullNone);
*
* foreach (var element in elements)
* {
* var shape = element.Shape.Shape;
*
* if (shape.Type == ColliderShapeTypes.Compound) //multiple shapes
* {
* DrawDebugCompound(ref viewProj, (CompoundColliderShape)shape, element);
* }
* else if (shape.Type != ColliderShapeTypes.StaticPlane) //a single shape
* {
* var physTrans = element.Collider.PhysicsWorldTransform;
*
* //must account collider shape scaling
* Matrix worldTrans;
* Matrix.Multiply(ref element.Shape.Shape.DebugPrimitiveScaling, ref physTrans, out worldTrans);
*
* Simulation.DebugEffect.WorldViewProj = worldTrans * viewProj;
* Simulation.DebugEffect.Color = element.Collider.IsActive ? Color.Green : Color.Red;
* Simulation.DebugEffect.UseUv = shape.Type != ColliderShapeTypes.ConvexHull;
*
* Simulation.DebugEffect.Apply();
*
* shape.DebugPrimitive.Draw();
* }
* }
*
* Simulation.DebugGraphicsDevice.SetRasterizerState(rasterizers.CullBack);
* }
*/
internal void UpdateCharacters()
{
charactersProfilingState.Begin();
//characters need manual updating
foreach (var element in characters)
{
if (!element.Collider.Enabled)
{
continue;
}
var worldTransform = element.Collider.PhysicsWorldTransform;
element.UpdateTransformationComponent(ref worldTransform);
charactersProfilingState.Mark();
}
charactersProfilingState.End();
}
internal void ProcessContacts()
{
contactsProfilingState.Begin();
processedPairsFastCache.Clear();
var numManifolds = collisionWorld.Dispatcher.NumManifolds;
for (var i = 0; i < numManifolds; i++)
{
var manifold = collisionWorld.Dispatcher.GetManifoldByIndexInternal(i);
var bodyA = manifold.Body0;
var bodyB = manifold.Body1;
var colA = (Collider)bodyA?.UserObject;
var colB = (Collider)bodyB?.UserObject;
if (colA == null || colB == null)
{
continue;
}
if (!colA.ContactsAlwaysValid && !colB.ContactsAlwaysValid)
{
continue;
}
//Pairs management
Collision pair = null;
var newPair = true;
foreach (var pair1 in colA.Collisions)
{
if ((pair1.ColliderA != colA || pair1.ColliderB != colB) && (pair1.ColliderA != colB || pair1.ColliderB != colA))
{
continue;
}
pair = pair1;
newPair = false;
break;
}
var numContacts = manifold.NumContacts;
if (numContacts == 0 && newPair)
{
continue;
}
newContactsFastCache.Clear();
updatedContactsFastCache.Clear();
deletedContactsFastCache.Clear();
if (newPair)
{
if (collisionsQueue.Count > 0)
{
pair = collisionsQueue.Dequeue();
}
else
{
pair = new Collision
{
Contacts = new List <ContactPoint>()
};
}
pair.ColliderA = colA;
pair.ColliderB = colB;
pair.Contacts.Clear();
colA.Collisions.Add(pair);
colB.Collisions.Add(pair);
alivePairsFastCache.Add(pair);
}
else
{
foreach (var contact in pair.Contacts)
{
deletedContactsFastCache.Add(contact);
}
}
processedPairsFastCache.Add(pair);
for (var y = 0; y < numContacts; y++)
{
var cp = manifold.GetContactPoint(y);
ContactPoint contact = null;
var newContact = true;
foreach (var contact1 in pair.Contacts)
{
if (contact1.Handle.IsAllocated && cp.UserPersistentPtr != IntPtr.Zero && contact1.Handle.Target != GCHandle.FromIntPtr(cp.UserPersistentPtr).Target)
{
continue;
}
contact = contact1;
newContact = false;
break;
}
contactsProfilingState.Mark();
if (newContact)
{
contact = contactsQueue.Count > 0 ? contactsQueue.Dequeue() : new ContactPoint();
contact.Distance = cp.Distance;
contact.PositionOnA = new Vector3(cp.PositionWorldOnA.X, cp.PositionWorldOnA.Y, cp.PositionWorldOnA.Z);
contact.PositionOnB = new Vector3(cp.PositionWorldOnB.X, cp.PositionWorldOnB.Y, cp.PositionWorldOnB.Z);
contact.Normal = new Vector3(cp.NormalWorldOnB.X, cp.NormalWorldOnB.Y, cp.NormalWorldOnB.Z);
contact.Pair = pair;
contact.Handle = GCHandle.Alloc(contact);
cp.UserPersistentPtr = GCHandle.ToIntPtr(contact.Handle);
pair.Contacts.Add(contact);
}
else
{
deletedContactsFastCache.Remove(contact);
}
if (newContact)
{
newContactsFastCache.Add(contact);
}
else
{
updatedContactsFastCache.Add(contact);
}
}
//deliver async events
if (newPair)
{
//are we the first pair we detect?
if (colA.Collisions.Count == 1)
{
while (colA.FirstCollisionChannel.Balance < 0)
{
colA.FirstCollisionChannel.Send(pair);
}
}
//are we the first pair we detect?
if (colB.Collisions.Count == 1)
{
while (colB.FirstCollisionChannel.Balance < 0)
{
colB.FirstCollisionChannel.Send(pair);
}
}
while (colA.NewPairChannel.Balance < 0)
{
colA.NewPairChannel.Send(pair);
}
while (colB.NewPairChannel.Balance < 0)
{
colB.NewPairChannel.Send(pair);
}
}
foreach (var contact in newContactsFastCache)
{
while (contact.Pair.NewContactChannel.Balance < 0)
{
contact.Pair.NewContactChannel.Send(contact);
}
}
foreach (var contact in updatedContactsFastCache)
{
while (contact.Pair.ContactUpdateChannel.Balance < 0)
{
contact.Pair.ContactUpdateChannel.Send(contact);
}
}
foreach (var contact in deletedContactsFastCache)
{
while (contact.Pair.ContactEndedChannel.Balance < 0)
{
contact.Pair.ContactEndedChannel.Send(contact);
}
pair.Contacts.Remove(contact);
contact.Handle.Free();
contactsQueue.Enqueue(contact);
}
if (pair.Contacts.Count == 0)
{
colA.Collisions.Remove(pair);
colB.Collisions.Remove(pair);
alivePairsFastCache.Remove(pair);
collisionsQueue.Enqueue(pair);
while (colA.PairEndedChannel.Balance < 0)
{
colA.PairEndedChannel.Send(pair);
}
while (colB.PairEndedChannel.Balance < 0)
{
colB.PairEndedChannel.Send(pair);
}
if (colA.Collisions.Count == 0)
{
while (colA.AllPairsEndedChannel.Balance < 0)
{
colA.AllPairsEndedChannel.Send(pair);
}
}
if (colB.Collisions.Count == 0)
{
while (colB.AllPairsEndedChannel.Balance < 0)
{
colB.AllPairsEndedChannel.Send(pair);
}
}
}
}
//Sometimes narrowphase is skipped it seems and we might get some stuck pair!
foreach (var pair in alivePairsFastCache)
{
if (!processedPairsFastCache.Contains(pair))
{
removedPairsFastCache.Enqueue(pair);
}
}
while (removedPairsFastCache.Count > 0)
{
var pair = removedPairsFastCache.Dequeue();
alivePairsFastCache.Remove(pair);
//this pair got removed!
foreach (var contactPoint in pair.Contacts)
{
while (contactPoint.Pair.ContactEndedChannel.Balance < 0)
{
contactPoint.Pair.ContactEndedChannel.Send(contactPoint);
}
contactPoint.Handle.Free();
contactsQueue.Enqueue(contactPoint);
}
var colA = pair.ColliderA;
var colB = pair.ColliderB;
colA.Collisions.Remove(pair);
colB.Collisions.Remove(pair);
collisionsQueue.Enqueue(pair);
while (colA.PairEndedChannel.Balance < 0)
{
colA.PairEndedChannel.Send(pair);
}
while (colB.PairEndedChannel.Balance < 0)
{
colB.PairEndedChannel.Send(pair);
}
if (colA.Collisions.Count == 0)
{
while (colA.AllPairsEndedChannel.Balance < 0)
{
colA.AllPairsEndedChannel.Send(pair);
}
}
if (colB.Collisions.Count == 0)
{
while (colB.AllPairsEndedChannel.Balance < 0)
{
colB.AllPairsEndedChannel.Send(pair);
}
}
}
contactsProfilingState.End();
}