ChaosCooking.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Containers/Array.h"
#include "Templates/UniquePtr.h"
#include "Async/TaskGraphInterfaces.h"
#include "PhysicsEngine/BodySetup.h"
 
struct FTriMeshCollisionData;
 
namespace Chaos
{
    class FImplicitObject;
    class FTriangleMeshImplicitObject;
}
 
namespace Chaos
{
    namespace Cooking
    {
        ENGINE_API Chaos::FTriangleMeshImplicitObjectPtr BuildSingleTrimesh(const FTriMeshCollisionData& Desc, TArray<int32>& OutFaceRemap, TArray<int32>& OutVertexRemap);
 
        void BuildConvexMeshes(TArray<Chaos::FImplicitObjectPtr>& OutTriangleMeshes, const FCookBodySetupInfo& InParams);
        void BuildTriangleMeshes(TArray<Chaos::FTriangleMeshImplicitObjectPtr>& OutTriangleMeshes, TArray<int32>& OutFaceRemap, TArray<int32>& OutVertexRemap, const FCookBodySetupInfo& InParams);
    }
 
    struct FCookHelper
    {
        FCookHelper() = delete;
        FCookHelper(UBodySetup* InSetup);
 
        TArray<Chaos::FImplicitObjectPtr> SimpleImplicits;
        TArray<Chaos::FTriangleMeshImplicitObjectPtr> ComplexImplicits;
        FBodySetupUVInfo UVInfo;
        TArray<int32> FaceRemap;
        TArray<int32> VertexRemap;
 
        void Cook();
        void CookAsync(FSimpleDelegateGraphTask::FDelegate CompletionDelegate);
        bool HasWork() const;
 
        // CancelCookAsync is not guaranteed to have any effect on the work done.
        // If it is called the cook work may be abandoned and the CookAsync may return early.
        // If bCancel is true in the CompletionDelegate the results must be ignored.
        void CancelCookAsync() { bCanceled = true; }
        bool WasCanceled() const { return bCanceled; }
 
    private:
        UBodySetup* SourceSetup;
        FCookBodySetupInfo CookInfo;
        std::atomic<bool> bCanceled;
    };
}