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  3. FCollisionContextAllocator

FCollisionContextAllocator

Container the storage for the [FCollisionConstraintAllocator](API\Runtime\Chaos\FCollisionConstraintAllocator), as well as the API to create new midphases and collision constraints.

API > API/Runtime > API/Runtime/Chaos

Container the storage for the FCollisionConstraintAllocator, as well as the API to create new midphases and collision constraints. We have one of these objects per thread on which collisions detection is performed to get lock-free allocations and lists.

   
Name FCollisionContextAllocator
Type class
Header File /Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/Collision/CollisionConstraintAllocator.h
Include Path #include "Chaos/Collision/CollisionConstraintAllocator.h"

Syntax

class FCollisionContextAllocator

Constructors

Name Remarks Include Path Unreal Specifiers

FCollisionContextAllocator ( FPBDCollisionConstraints* InCollisionContainer,
const int32 InNumCollisionsPerBlock,
const int32 InCurrentEpoch
)

   Chaos/Collision/CollisionConstraintAllocator.h  

Variables

Protected

Name Type Remarks Include Path Unreal Specifiers
CollisionContainer FPBDCollisionConstraints *   Chaos/Collision/CollisionConstraintAllocator.h  
ConstraintPool FPBDCollisionConstraintPool   Chaos/Collision/CollisionConstraintAllocator.h  
CurrentEpoch int32   Chaos/Collision/CollisionConstraintAllocator.h  
NewActiveConstraints TArray< FPBDCollisionConstraint * >   Chaos/Collision/CollisionConstraintAllocator.h  
NewMidPhases TArray< FParticlePairMidPhase * >   Chaos/Collision/CollisionConstraintAllocator.h  

Functions

Public

Name Remarks Include Path Unreal Specifiers
Set the constraint as Active - it will be added to the graph and solved this tick. Chaos/Collision/CollisionConstraintAllocator.h  

FPBDCollisionConstraintPtr CreateConstraint ()

 Create an uninitialized collision constraint (public only for use by Resim which overwrites it with a saved constraint) Chaos/Collision/CollisionConstraintAllocator.h  

FPBDCollisionConstraintPtr CreateConstraint ( FGeometryParticleHandle* Particle0,
const FImplicitObject* Implicit0,
const FPerShapeData* Shape0,
const FBVHParticles* Simplicial0,
const FRigidTransform3& ShapeRelativeTransform0,
FGeometryParticleHandle* Particle1,
const FImplicitObject* Implicit1,
const FPerShapeData* Shape1,
const FBVHParticles* Simplicial1,
const FRigidTransform3& ShapeRelativeTransform1,
const FReal CullDistance,
const bool bUseManifold,
const EContactShapesType ShapePairType
)

 Create a constraint (called by the MidPhase) Chaos/Collision/CollisionConstraintAllocator.h  

FParticlePairMidPhase * FindMidPhase ( FGeometryParticleHandle* Particle0,
FGeometryParticleHandle* Particle1,
FGeometryParticleHandle* SearchParticlePerformanceHint
)

 Return a midphase for a particle pair if it already exists, otherwise return null Chaos/Collision/CollisionConstraintAllocator.h  

int32 GetCurrentEpoch()

 The current epoch used to determine if a collision is up to date Chaos/Collision/CollisionConstraintAllocator.h  

FParticlePairMidPhase * GetMidPhase ( FGeometryParticleHandle* Particle0,
FGeometryParticleHandle* Particle1,
FGeometryParticleHandle* SearchParticlePerformanceHint,
const FCollisionContext& Context
)

 Return a midphase for a particle pair. Chaos/Collision/CollisionConstraintAllocator.h  

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