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Add distance-based and frustum-based culling to cloth

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This commit is contained in:
Wojtek Figat
2023-07-17 11:16:01 +02:00
parent de8613e223
commit 1af076f180
4 changed files with 130 additions and 38 deletions
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78
Source/Engine/Physics/PhysX/PhysicsBackendPhysX.cpp
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@@ -41,6 +41,7 @@
#if WITH_CLOTH
#include "Engine/Physics/Actors/Cloth.h"
#include "Engine/Threading/JobSystem.h"
#include "Engine/Threading/Threading.h"
#include <ThirdParty/NvCloth/Callbacks.h>
#include <ThirdParty/NvCloth/Factory.h>
#include <ThirdParty/NvCloth/Cloth.h>
@@ -94,15 +95,12 @@ struct ScenePhysX
#endif
#if WITH_CLOTH
nv::cloth::Solver* ClothSolver = nullptr;
Array<nv::cloth::Cloth*> ClothsList;
#endif
#if WITH_CLOTH
void PreSimulateCloth(int32 i);
void SimulateCloth(int32 i)
{
PROFILE_CPU();
ClothSolver->simulateChunk(i);
}
void SimulateCloth(int32 i);
#endif
};
@@ -171,12 +169,8 @@ struct FabricSettings
Desc.InvMassesStride == r.InvMassesStride)
{
if (Desc.InvMassesData && r.InvMassesData)
{
bool matches = Platform::MemoryCompare(InvMasses.Get(), r.InvMassesData, r.VerticesCount * r.InvMassesStride) == 0;
return matches;
}
bool matches = !Desc.InvMassesData && !r.InvMassesData;
return matches;
return Platform::MemoryCompare(InvMasses.Get(), r.InvMassesData, r.VerticesCount * r.InvMassesStride) == 0;
return !Desc.InvMassesData && !r.InvMassesData;
}
return false;
}
@@ -184,9 +178,10 @@ struct FabricSettings
struct ClothSettings
{
bool Culled = false;
bool SceneCollisions = false;
byte CollisionsUpdateFramesLeft = 0;
bool CollisionsUpdateFramesRandomize = true;
byte CollisionsUpdateFramesLeft = 0;
float GravityScale = 1.0f;
float CollisionThickness = 0.0f;
Cloth* Actor;
@@ -576,6 +571,7 @@ namespace
#endif
#if WITH_CLOTH
CriticalSection ClothLocker;
nv::cloth::Factory* ClothFactory = nullptr;
Dictionary<nv::cloth::Fabric*, FabricSettings> Fabrics;
Dictionary<nv::cloth::Cloth*, ClothSettings> Cloths;
@@ -708,10 +704,28 @@ void InitVehicleSDK()
void ScenePhysX::PreSimulateCloth(int32 i)
{
PROFILE_CPU();
auto clothPhysX = (nv::cloth::Cloth*)ClothSolver->getClothList()[i];
auto clothPhysX = ClothsList[i];
auto& clothSettings = Cloths[clothPhysX];
clothSettings.Actor->OnPreUpdate();
if (clothSettings.Actor->OnPreUpdate())
{
// Cull simulation based on distance
if (!clothSettings.Culled)
{
clothSettings.Culled = true;
ClothLocker.Lock();
ClothSolver->removeCloth(clothPhysX);
ClothLocker.Unlock();
}
return;
}
if (clothSettings.Culled)
{
clothSettings.Culled = false;
ClothLocker.Lock();
ClothSolver->addCloth(clothPhysX);
ClothLocker.Unlock();
}
// Setup automatic scene collisions with colliders around the cloth
if (clothSettings.SceneCollisions && clothSettings.CollisionsUpdateFramesLeft == 0)
@@ -831,7 +845,7 @@ void ScenePhysX::PreSimulateCloth(int32 i)
break;
}
// Cloth vs Triangle collisions are too slow for real-time use
#if 0
#if 0
case PxGeometryType::eTRIANGLEMESH:
{
const PxTriangleMeshGeometry& geomTriangleMesh = (const PxTriangleMeshGeometry&)geo;
@@ -880,6 +894,12 @@ void ScenePhysX::PreSimulateCloth(int32 i)
clothSettings.CollisionsUpdateFramesLeft--;
}
void ScenePhysX::SimulateCloth(int32 i)
{
PROFILE_CPU();
ClothSolver->simulateChunk(i);
}
#endif
void* PhysicalMaterial::GetPhysicsMaterial()
@@ -1632,17 +1652,15 @@ void PhysicsBackend::EndSimulateScene(void* scene)
#if WITH_CLOTH
nv::cloth::Solver* clothSolver = scenePhysX->ClothSolver;
if (clothSolver && clothSolver->getNumCloths() != 0)
if (clothSolver && scenePhysX->ClothsList.Count() != 0)
{
PROFILE_CPU_NAMED("Physics.Cloth");
const int32 clothsCount = scenePhysX->ClothSolver->getNumCloths();
nv::cloth::Cloth* const* cloths = scenePhysX->ClothSolver->getClothList();
{
PROFILE_CPU_NAMED("Pre");
Function<void(int32)> job;
job.Bind<ScenePhysX, &ScenePhysX::PreSimulateCloth>(scenePhysX);
JobSystem::Execute(job, clothsCount);
JobSystem::Execute(job, scenePhysX->ClothsList.Count());
}
{
@@ -1658,10 +1676,12 @@ void PhysicsBackend::EndSimulateScene(void* scene)
{
PROFILE_CPU_NAMED("Post");
for (int32 i = 0; i < clothsCount; i++)
ScopeLock lock(ClothLocker);
for (auto clothPhysX : scenePhysX->ClothsList)
{
auto clothPhysX = (nv::cloth::Cloth*)cloths[i];
const auto& clothSettings = Cloths[clothPhysX];
if (clothSettings.Culled)
continue;
clothSettings.UpdateBounds(clothPhysX);
clothSettings.Actor->OnPostUpdate();
}
@@ -3410,6 +3430,7 @@ void* PhysicsBackend::CreateCloth(const PhysicsClothDesc& desc)
#endif
// Lazy-init NvCloth
ScopeLock lock(ClothLocker);
if (ClothFactory == nullptr)
{
nv::cloth::InitializeNvCloth(&AllocatorCallback, &ErrorCallback, &AssertCallback, &ProfilerCallback);
@@ -3507,6 +3528,7 @@ void* PhysicsBackend::CreateCloth(const PhysicsClothDesc& desc)
void PhysicsBackend::DestroyCloth(void* cloth)
{
ScopeLock lock(ClothLocker);
auto clothPhysX = (nv::cloth::Cloth*)cloth;
if (--Fabrics[&clothPhysX->getFabric()].Refs == 0)
Fabrics.Remove(&clothPhysX->getFabric());
@@ -3559,7 +3581,7 @@ void PhysicsBackend::SetClothSimulationSettings(void* cloth, const void* setting
auto clothPhysX = (nv::cloth::Cloth*)cloth;
const auto& settings = *(const Cloth::SimulationSettings*)settingsPtr;
clothPhysX->setSolverFrequency(settings.SolverFrequency);
clothPhysX->setMotionConstraintScaleBias(settings.MaxDistance, 0.0f);
clothPhysX->setMotionConstraintScaleBias(settings.MaxParticleDistance, 0.0f);
clothPhysX->setWindVelocity(C2P(settings.WindVelocity));
}
@@ -3705,6 +3727,7 @@ void PhysicsBackend::SetClothPaint(void* cloth, Span<const float> value)
void PhysicsBackend::AddCloth(void* scene, void* cloth)
{
ScopeLock lock(ClothLocker);
auto scenePhysX = (ScenePhysX*)scene;
auto clothPhysX = (nv::cloth::Cloth*)cloth;
if (scenePhysX->ClothSolver == nullptr)
@@ -3713,13 +3736,20 @@ void PhysicsBackend::AddCloth(void* scene, void* cloth)
ASSERT(scenePhysX->ClothSolver);
}
scenePhysX->ClothSolver->addCloth(clothPhysX);
scenePhysX->ClothsList.Add(clothPhysX);
}
void PhysicsBackend::RemoveCloth(void* scene, void* cloth)
{
ScopeLock lock(ClothLocker);
auto scenePhysX = (ScenePhysX*)scene;
auto clothPhysX = (nv::cloth::Cloth*)cloth;
scenePhysX->ClothSolver->removeCloth(clothPhysX);
auto& clothSettings = Cloths[clothPhysX];
if (clothSettings.Culled)
clothSettings.Culled = false;
else
scenePhysX->ClothSolver->removeCloth(clothPhysX);
scenePhysX->ClothsList.Remove(clothPhysX);
}
#endif