void FPhysScene::ProcessPhysScene(uint32 SceneType)
{
SCOPE_CYCLE_COUNTER(STAT_TotalPhysicsTime);
SCOPE_CYCLE_COUNTER(STAT_PhysicsFetchDynamicsTime);
check(SceneType < NumPhysScenes);
if (bPhysXSceneExecuting[SceneType] == 0)
{
// Not executing this scene, must call TickPhysScene before calling this function again.
UE_LOG(LogPhysics, Log, TEXT("WaitPhysScene`: Not executing this scene (%d) - aborting."), SceneType);
return;
}
if (FrameLagAsync())
{
static_assert(PST_MAX == 3, "Physics scene static test failed."); // Here we assume the PST_Sync is the master and never fame lagged
if (SceneType == PST_Sync)
{
// the one frame lagged one should be done by now.
check(!FrameLaggedPhysicsSubsceneCompletion[PST_Async].GetReference() || FrameLaggedPhysicsSubsceneCompletion[PST_Async]->IsComplete());
}
else if (SceneType == PST_Async)
{
FrameLaggedPhysicsSubsceneCompletion[PST_Async] = NULL;
}
}
// Reset execution flag
//This fetches and gets active transforms. It's important that the function that calls this locks because getting the transforms and using the data must be an atomic operation
#if WITH_PHYSX
PxScene* PScene = GetPhysXScene(SceneType);
check(PScene);
PxU32 OutErrorCode = 0;
#if !WITH_APEX
PScene->lockWrite();
PScene->fetchResults(true, &OutErrorCode);
PScene->unlockWrite();
#else // #if !WITH_APEX
// The APEX scene calls the fetchResults function for the PhysX scene, so we only call ApexScene->fetchResults().
NxApexScene* ApexScene = GetApexScene(SceneType);
check(ApexScene);
ApexScene->fetchResults(true, &OutErrorCode);
#endif // #if !WITH_APEX
UpdateActiveTransforms(SceneType);
if (OutErrorCode != 0)
{
UE_LOG(LogPhysics, Log, TEXT("PHYSX FETCHRESULTS ERROR: %d"), OutErrorCode);
}
#endif // WITH_PHYSX
PhysicsSubsceneCompletion[SceneType] = NULL;
bPhysXSceneExecuting[SceneType] = false;
}
void FPhysScene::ProcessPhysScene(uint32 SceneType)
{
SCOPE_CYCLE_COUNTER(STAT_TotalPhysicsTime);
SCOPE_CYCLE_COUNTER(STAT_PhysicsFetchDynamicsTime);
check(SceneType < NumPhysScenes);
if( bPhysXSceneExecuting[SceneType] == 0 )
{
// Not executing this scene, must call TickPhysScene before calling this function again.
UE_LOG(LogPhysics, Log, TEXT("WaitPhysScene`: Not executing this scene (%d) - aborting."), SceneType);
return;
}
PhysicsSubsceneCompletion[SceneType] = NULL;
if (FrameLagAsync())
{
checkAtCompileTime(PST_MAX == 2, Assumtiopns_about_physics_scenes); // Here we assume the PST_Sync is the master and never fame lagged
if (SceneType == PST_Sync)
{
// the one frame lagged one should be done by now.
check(!FrameLaggedPhysicsSubsceneCompletion[PST_Async].GetReference() || FrameLaggedPhysicsSubsceneCompletion[PST_Async]->IsComplete());
}
else
{
FrameLaggedPhysicsSubsceneCompletion[PST_Async] = NULL;
}
}
#if WITH_PHYSX
PxScene* PScene = GetPhysXScene(SceneType);
check(PScene);
PxU32 OutErrorCode = 0;
#if !WITH_APEX
PScene->lockWrite();
PScene->fetchResults( true, &OutErrorCode );
PScene->unlockWrite();
#else // #if !WITH_APEX
// The APEX scene calls the fetchResults function for the PhysX scene, so we only call ApexScene->fetchResults().
NxApexScene* ApexScene = GetApexScene(SceneType);
check(ApexScene);
ApexScene->fetchResults( true, &OutErrorCode );
#endif // #if !WITH_APEX
if(OutErrorCode != 0)
{
UE_LOG(LogPhysics, Log, TEXT("PHYSX FETCHRESULTS ERROR: %d"), OutErrorCode);
}
#endif // WITH_PHYSX
// Reset execution flag
bPhysXSceneExecuting[SceneType] = false;
}
void UDestructibleComponent::AddRadialForce(FVector Origin, float Radius, float Strength, ERadialImpulseFalloff Falloff, bool bAccelChange /* = false */)
{
#if WITH_APEX
if(bIgnoreRadialForce)
{
return;
}
if (ApexDestructibleActor == NULL)
{
return;
}
PxRigidDynamic** PActorBuffer = NULL;
PxU32 PActorCount = 0;
if (ApexDestructibleActor->acquirePhysXActorBuffer(PActorBuffer, PActorCount, NxDestructiblePhysXActorQueryFlags::Dynamic))
{
PxScene* LockedScene = NULL;
while (PActorCount--)
{
PxRigidDynamic* PActor = *PActorBuffer++;
if (PActor != NULL)
{
if (!LockedScene)
{
LockedScene = PActor->getScene();
LockedScene->lockWrite();
LockedScene->lockRead();
}
AddRadialForceToPxRigidBody_AssumesLocked(*PActor, Origin, Radius, Strength, Falloff, bAccelChange);
}
if (LockedScene)
{
LockedScene->unlockRead();
LockedScene->unlockWrite();
LockedScene = NULL;
}
}
ApexDestructibleActor->releasePhysXActorBuffer();
}
#endif // #if WITH_APEX
}
void UDestructibleComponent::SetCollisionResponseForAllActors(const FCollisionResponseContainer& ResponseOverride)
{
#if WITH_APEX
if (ApexDestructibleActor == NULL)
{
return;
}
PxRigidDynamic** PActorBuffer = NULL;
PxU32 PActorCount = 0;
if (ApexDestructibleActor->acquirePhysXActorBuffer(PActorBuffer, PActorCount))
{
PxScene* LockedScene = NULL;
while (PActorCount--)
{
PxRigidDynamic* PActor = *PActorBuffer++;
if (PActor != NULL)
{
FDestructibleChunkInfo* ChunkInfo = FPhysxUserData::Get<FDestructibleChunkInfo>(PActor->userData);
if (ChunkInfo != NULL)
{
if (!LockedScene)
{
LockedScene = PActor->getScene();
LockedScene->lockWrite();
LockedScene->lockRead();
}
SetCollisionResponseForActor(PActor, ChunkInfo->ChunkIndex, &ResponseOverride); // ChunkIndex is the last chunk made visible. But SetCollisionResponseForActor already doesn't respect per-chunk collision properties.
}
}
}
if (LockedScene)
{
LockedScene->unlockRead();
LockedScene->unlockWrite();
LockedScene = NULL;
}
ApexDestructibleActor->releasePhysXActorBuffer();
}
#endif
}
MirrorActor::MirrorActor(size_t actorHash,
physx::PxRigidActor &actor,
MirrorScene &mirrorScene) : mMirrorScene(mirrorScene), mPrimaryActor(&actor), mActorHash(actorHash)
{
mReleasePosted = false;
mMirrorActor = NULL;
mShapeCount = 0;
PxScene *scene = actor.getScene();
PX_ASSERT(scene);
if ( scene )
{
scene->lockWrite(__FILE__,__LINE__);
mPrimaryGlobalPose = actor.getGlobalPose();
PxPhysics *sdk = &scene->getPhysics();
if ( actor.getType() == physx::PxActorType::eRIGID_STATIC )
{
mMirrorActor = CloneStatic(*sdk,actor.getGlobalPose(),actor, mirrorScene.getMirrorFilter());
}
else
{
physx::PxRigidDynamic *rd = static_cast< physx::PxRigidDynamic *>(&actor);
mMirrorActor = CloneDynamic(*sdk,actor.getGlobalPose(),*rd, mirrorScene.getMirrorFilter());
if ( mMirrorActor )
{
rd = static_cast< physx::PxRigidDynamic *>(mMirrorActor);
rd->setRigidDynamicFlag(physx::PxRigidDynamicFlag::eKINEMATIC,true);
}
}
scene->unlockWrite();
if ( mMirrorActor )
{
MirrorCommand mc(MCT_CREATE_ACTOR,this);
mMirrorScene.postCommand(mc);
}
}
}
/** Exposes ticking of physics-engine scene outside Engine. */
void FPhysScene::TickPhysScene(uint32 SceneType, FGraphEventRef& InOutCompletionEvent)
{
SCOPE_CYCLE_COUNTER(STAT_TotalPhysicsTime);
SCOPE_CYCLE_COUNTER(STAT_PhysicsKickOffDynamicsTime);
check(SceneType < NumPhysScenes);
if (bPhysXSceneExecuting[SceneType] != 0)
{
// Already executing this scene, must call WaitPhysScene before calling this function again.
UE_LOG(LogPhysics, Log, TEXT("TickPhysScene: Already executing scene (%d) - aborting."), SceneType);
return;
}
#if WITH_SUBSTEPPING
if (IsSubstepping(SceneType)) //we don't bother sub-stepping cloth
{
//We're about to start stepping so swap buffers. Might want to find a better place for this?
PhysSubSteppers[SceneType]->SwapBuffers();
}
#endif
/**
* clamp down... if this happens we are simming physics slower than real-time, so be careful with it.
* it can improve framerate dramatically (really, it is the same as scaling all velocities down and
* enlarging all timesteps) but at the same time, it will screw with networking (client and server will
* diverge a lot more.)
*/
float UseDelta = FMath::Min(UseSyncTime(SceneType) ? SyncDeltaSeconds : DeltaSeconds, MaxPhysicsDeltaTime);
// Only simulate a positive time step.
if (UseDelta <= 0.f)
{
if (UseDelta < 0.f)
{
// only do this if negative. Otherwise, whenever we pause, this will come up
UE_LOG(LogPhysics, Warning, TEXT("TickPhysScene: Negative timestep (%f) - aborting."), UseDelta);
}
return;
}
#if WITH_PHYSX
GatherPhysXStats(GetPhysXScene(SceneType), SceneType);
#endif
/**
* Weight frame time according to PhysScene settings.
*/
AveragedFrameTime[SceneType] *= FrameTimeSmoothingFactor[SceneType];
AveragedFrameTime[SceneType] += (1.0f - FrameTimeSmoothingFactor[SceneType])*UseDelta;
// Set execution flag
bPhysXSceneExecuting[SceneType] = true;
check(!InOutCompletionEvent.GetReference()); // these should be gone because nothing is outstanding
InOutCompletionEvent = FGraphEvent::CreateGraphEvent();
bool bTaskOutstanding = false;
#if WITH_PHYSX
#if WITH_VEHICLE
if (VehicleManager && SceneType == PST_Sync)
{
float TickTime = AveragedFrameTime[SceneType];
#if WITH_SUBSTEPPING
if (IsSubstepping(SceneType))
{
TickTime = UseSyncTime(SceneType) ? SyncDeltaSeconds : DeltaSeconds;
}
#endif
VehicleManager->PreTick(TickTime);
#if WITH_SUBSTEPPING
if (IsSubstepping(SceneType) == false)
#endif
{
VehicleManager->Update(AveragedFrameTime[SceneType]);
}
}
#endif
#if !WITH_APEX
PxScene* PScene = GetPhysXScene(SceneType);
if (PScene && (UseDelta > 0.f))
{
PhysXCompletionTask* Task = new PhysXCompletionTask(InOutCompletionEvent, PScene->getTaskManager());
PScene->lockWrite();
PScene->simulate(AveragedFrameTime[SceneType], Task);
PScene->unlockWrite();
Task->removeReference();
bTaskOutstanding = true;
}
#else // #if !WITH_APEX
// The APEX scene calls the simulate function for the PhysX scene, so we only call ApexScene->simulate().
NxApexScene* ApexScene = GetApexScene(SceneType);
if(ApexScene && UseDelta > 0.f)
{
#if WITH_SUBSTEPPING
if (IsSubstepping(SceneType)) //we don't bother sub-stepping cloth
{
bTaskOutstanding = SubstepSimulation(SceneType, InOutCompletionEvent);
}else
#endif
{
PhysXCompletionTask* Task = new PhysXCompletionTask(InOutCompletionEvent, ApexScene->getTaskManager());
ApexScene->simulate(AveragedFrameTime[SceneType], true, Task);
Task->removeReference();
bTaskOutstanding = true;
}
}
#endif // #if !WITH_APEX
#endif // WITH_PHYSX
if (!bTaskOutstanding)
{
InOutCompletionEvent->DispatchSubsequents(); // nothing to do, so nothing to wait for
}
#if WITH_SUBSTEPPING
bSubstepping = UPhysicsSettings::Get()->bSubstepping;
bSubsteppingAsync = UPhysicsSettings::Get()->bSubsteppingAsync;
#endif
}