ScParticleSystemShapeCore.cpp

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// SPDX-FileCopyrightText: Copyright (c) 2008-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.

// SPDX-License-Identifier: Apache-2.0

#include "foundation/PxPreprocessor.h"

#if PX_SUPPORT_GPU_PHYSX

#include "foundation/PxErrorCallback.h"

#include "ScParticleSystemShapeCore.h"

#include "ScPhysics.h"

#include "PxvGlobals.h"

#include "PxPhysXGpu.h"

#include "cudamanager/PxCudaContextManager.h"

#include "CmVisualization.h"

using namespace physx;

using namespace Sc;

ParticleSystemShapeCore::ParticleSystemShapeCore()

	: ShapeCore(PxEmpty)

	, mGpuMemStat(0)

	mSimulationFilterData = PxFilterData();

	mShapeCoreFlags |= PxShapeCoreFlag::eOWNS_MATERIAL_IDX_MEMORY;

	mGeometry.set(PxParticleSystemGeometry());

	reinterpret_cast<PxParticleSystemGeometryLL&>(mGeometry).materialsLL = MaterialIndicesStruct();

	const PxTolerancesScale& scale = Physics::getInstance().getTolerancesScale();

	setTransform(PxTransform(PxIdentity));

	mContactOffset = 0.01f * scale.length;

	mShapeFlags = 0;

	mMaterialIndex = 0;

	mMinTorsionalPatchRadius = 0.f;

	mTorsionalRadius = 0.f;

	mLLCore.sleepThreshold = 5e-5f * scale.speed * scale.speed;

	mLLCore.wakeCounter = Physics::sWakeCounterOnCreation;

	mLLCore.freezeThreshold = 5e-6f * scale.speed * scale.speed;

	//TODO, make this dependend on scale?

	//also set contact offset accordingly

	mLLCore.restOffset = 0.1f;

	const PxReal contactOffset = mLLCore.restOffset + 0.001f;

	setContactOffset(contactOffset);

	mLLCore.particleContactOffset = contactOffset;

	mLLCore.solidRestOffset = mLLCore.restOffset;

	mLLCore.fluidRestOffset = mLLCore.restOffset * 0.6f;

	mLLCore.particleContactOffset_prev = FLT_MIN;

	mLLCore.fluidRestOffset_prev = FLT_MIN;

	mLLCore.fluidBoundaryDensityScale = 0.0f;

	mLLCore.gridSizeX = 128;

	mLLCore.gridSizeY = 128;

	mLLCore.gridSizeZ = 128;

	mLLCore.mFlags = PxParticleFlags(0);

	mLLCore.mLockFlags = PxParticleLockFlags(0);

	mLLCore.solverIterationCounts = (1 << 8) | 4;

	mLLCore.mWind = PxVec3(0.f);

	// Sparse grid specific

	mLLCore.sparseGridParams.setToDefault();

	mLLCore.sparseGridParams.gridSpacing = 2.0f * mLLCore.particleContactOffset;

// PX_SERIALIZATION

ParticleSystemShapeCore::ParticleSystemShapeCore(const PxEMPTY)

	: ShapeCore(PxEmpty)

ParticleSystemShapeCore::~ParticleSystemShapeCore()

void ParticleSystemShapeCore::initializeLLCoreData(PxU32 maxNeighborhood, PxReal neighborhoodScale)

	mLLCore.mMaxNeighborhood = maxNeighborhood;

	mLLCore.mNeighborhoodScale = neighborhoodScale;

	// Unbounded by default.

	mLLCore.maxDepenetrationVelocity = 1e32f;

	mLLCore.maxVelocity = 1e+6f;

#endif // PX_SUPPORT_GPU_PHYSX