GeometryCollectionProximityPropertiesInterface.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "GeometryCollection/ManagedArrayCollection.h"
#include "GeometryCollection/GeometryCollectionProximityUtility.h"
 
class FGeometryCollection;
 
class FGeometryCollectionProximityPropertiesInterface : public FManagedArrayInterface
{
public :
    typedef FManagedArrayInterface Super;
    using FManagedArrayInterface::ManagedCollection;
 
    // Proximity Properties Group Name
    static CHAOS_API const FName ProximityPropertiesGroup;
    
    // Attribute: Method to determine proximity
    static CHAOS_API const FName ProximityDetectionMethod;
    // Attribute: For convex hull proximity, what separation distance can still be considered as 'proximity'
    static CHAOS_API const FName ProximityDistanceThreshold;
    // Attribute: Whether to use the computed proximity graph as a connection graph
    static CHAOS_API const FName ProximityAsConnectionGraph;
    // Attribute: How to compute contact area for connection graph edges, to be used by the simulation
    static CHAOS_API const FName ProximityConnectionGraphContactAreaMethod;
    // Attribute: If greater than zero, filter proximity connections by requiring an amount of 'contact' as computed by the Contact Method
    // This is a second filter applied after initial proximity connections were determined by any Proximity Detection Method,
    // and can be used to reduce unsupported or spurious/glancing proximities.
    static CHAOS_API const FName ProximityRequireContactAmount;
    // Attribute: How to define 'contact' for the above Require Contact Amount.
    static CHAOS_API const FName ProximityContactMethod;
 
    struct FProximityProperties
    {
        EProximityMethod Method = EProximityMethod::Precise;
        float DistanceThreshold = 1.0f;
        float RequireContactAmount = 0.0f;
        EProximityContactMethod ContactMethod = EProximityContactMethod::MinOverlapInProjectionToMajorAxes;
        EConnectionContactMethod ContactAreaMethod = EConnectionContactMethod::None;
        bool bUseAsConnectionGraph = false;
    };
 
    CHAOS_API FGeometryCollectionProximityPropertiesInterface(FGeometryCollection* InGeometryCollection);
 
    CHAOS_API void InitializeInterface() override;
 
    CHAOS_API void CleanInterfaceForCook() override;
    
    CHAOS_API void RemoveInterfaceAttributes() override;
 
    CHAOS_API FProximityProperties GetProximityProperties() const;
    CHAOS_API void SetProximityProperties(const FProximityProperties&);
};