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  3. FGeometryCollectionConvexUtility

FGeometryCollectionConvexUtility

API > API/Runtime > API/Runtime/Chaos > API/Runtime/Chaos/GeometryCollection

References

   
Module Chaos
Header /Engine/Source/Runtime/Experimental/Chaos/Public/GeometryCollection/GeometryCollectionConvexUtility.h
Include #include "GeometryCollection/GeometryCollectionConvexUtility.h"

Syntax

class FGeometryCollectionConvexUtility

Functions

  Type Name Description
Public function Static UE::GeometryCollectionConvexUtility::FConvexHulls

ComputeLeafHulls ( FGeometryCollection* GeometryCollection,
const TArray< FTransform >& GlobalTransformArray,
double SimplificationDistanceThreshold,
double OverlapRemovalShrinkPercent,
TFunction< bool(int32)> SkipBoneFn,
const FConvexDecompositionSettings* OptionalDecompositionSettings
)

 Compute just the hulls of the leaf / rigid nodes that hold geometry directly, with no cluster hulls and no overlap removal by cutting This is an initial step of several algorithms: The CreateNonOverlappingConvexHullData function as well as convex-based proximity detection (TODO: and the auto-embed algorithm?) (TODO: Make auto-embed use this instead of the full hulls?)
Public function Static void

ConvertImplicitToConvexArray ( const Chaos::FImplicitObject& InImplicit,
const FTransform& Transform,
TArray< FTransformedConvex >& InOutConvex
)

 Generate a list of convex out of a hierarchy of implciit shapes suported shapes are scaled / transformed implicits as well as Boxes, convexes, spheres and capsules levelset, tapered capsule, cylinder, heightfields and trimesh are not supported array will not be erased and convex will be added if any already exists
Public function Static void

CopyChildConvexes ( const FGeometryCollection* FromCollection,
const TArrayView< const int32 >& FromTransformIdx,
FGeometryCollection* ToCollection,
const TArrayView< const int32 >& ToTransformIdx,
bool bLeafOnly
)

 Copy convex hulls from below FromTransformIdx over to all live at ToTransformIdx.
Public function Static FGeometryCollectionConvexData

CreateNonOverlappingConvexHullData ( FGeometryCollection* GeometryCollection,
double FractionAllowRemove,
double SimplificationDistanceThreshold,
double CanExceedFraction,
EConvexOverlapRemoval OverlapRemovalMethod,
double OverlapRemovalShrinkPercent,
UE::GeometryCollectionConvexUtility::FConvexHulls* ComputedLeafHullsToModify
)

 Create non-overlapping convex hull data for all transforms in the geometry collection (except transforms where it would be better to just use the hulls of the children)
Public function Static TUniquePtr< Chaos::FConvex >

FindConvexHull ( const FGeometryCollection* GeometryCollection,
int32 GeometryIndex
)

 Returns the convex hull of the vertices contained in the specified geometry.
Public function Static void

GenerateClusterConvexHullsFromChildrenHulls ( FGeometryCollection& Collection,
const FClusterConvexHullSettings& Settings,
const TArrayView< const int32 > TransformSubset
)

  
Public function Static void  
Public function Static void  
Public function Static void

GenerateClusterConvexHullsFromLeafHulls ( FGeometryCollection& Collection,
const FClusterConvexHullSettings& Settings,
const TArrayView< const int32 > OptionalTransformSubset
)

  
Public function Static void

GenerateLeafConvexHulls ( FGeometryCollection& Collection,
bool bRestrictToSelection,
const TArrayView< const int32 > TransformSubset,
const FLeafConvexHullSettings& Settings
)

  
Public function Static TOptional< FGeometryCollectionConvexData > Get convex hull data for the Geometry Collection if it is present
Public function Static TManagedArray< int32 > *

GetCustomConvexFlags ( FGeometryCollection* GeometryCollection,
bool bAddIfMissing
)

 Get the HasCustomConvex flags.
Public function Static FGeometryCollectionConvexData Ensure that convex hull data exists for the Geometry Collection and construct it if not (or if some data is missing.
Public function Static bool

HasConvexHullData ( const FManagedArrayCollection* GeometryCollection
)

  
Public function Static void

MergeHullsOnTransforms ( FManagedArrayCollection& Collection,
const FGeometryCollectionConvexUtility::FMergeConvexHullSettings& Settings,
bool bRestrictToSelection,
const TArrayView< const int32 > OptionalTransformSelection
)

 Merge convex hulls that are currently on each (selected) transform. If convex hulls are not present, does nothing.
Public function Static void

RemoveConvexHulls ( FGeometryCollection* GeometryCollection,
const TArray< int32 >& SortedTransformDeletes
)

 Delete the convex hulls pointed at by the transform indices provided.
Public function Static void Delete the convex hulls that are null
Public function Static void

SetDefaults ( FGeometryCollection* GeometryCollection,
FName Group,
uint32 StartSize,
uint32 NumElements
)

 Set default values for convex hull related managed arrays.
Public function Static void Set Volume and Size attributes on the Collection (will be called by CreateNonOverlappingConvexHullData Volumes must be up to date for convex calc)
Public function Static bool

ValidateConvexData ( const FManagedArrayCollection* GeometryCollection
)

  

Classes

  Type Name Description
Public struct FClusterConvexHullSettings    
Public struct FConvexDecompositionSettings Settings to control convex decompositions. Note the default values are set to not perform any decomposition.  
Public struct FGeometryCollectionConvexData    
Public struct FIntersectionFilters Additional settings for filtering when the EGenerateConvexMethod::IntersectExternalWithComputed is applied.  
Public struct FLeafConvexHullSettings Settings to control how convex hulls are generated for rigid/leaf nodes, from the geometry and/or imported collision shapes.  
Public struct FMergeConvexHullSettings    
Public struct FTransformedConvex    

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