NavLinkRenderingProxy.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#if UE_ENABLE_INCLUDE_ORDER_DEPRECATED_IN_5_4
#include "CoreMinimal.h"
#endif
#include "NavAreas/NavArea.h"
#include "PrimitiveViewRelevance.h"
#include "PrimitiveSceneProxy.h"
#include "AI/Navigation/NavLinkDefinition.h"
 
class FMaterialRenderProxy;
class FMeshElementCollector;
class FPrimitiveDrawInterface;
class UPrimitiveComponent;
 
class FNavLinkRenderingProxy : public FPrimitiveSceneProxy
{
private:
    AActor* LinkOwnerActor;
    class INavLinkHostInterface* LinkOwnerHost;
 
public:
    NAVIGATIONSYSTEM_API SIZE_T GetTypeHash() const override;
 
    struct FNavLinkDrawing
    {
        FNavLinkDrawing() {}
        FNavLinkDrawing(const FTransform& InLocalToWorld, const FNavigationLink& Link)
            : Left(InLocalToWorld.TransformPosition(Link.Left))
            , Right(InLocalToWorld.TransformPosition(Link.Right))
            , Direction(Link.Direction)
            , Color(UNavArea::GetColor(Link.GetAreaClass()))
            , SnapRadius(Link.SnapRadius)
            , SnapHeight(Link.bUseSnapHeight ? Link.SnapHeight : -1.0f)
            , SupportedAgentsBits(Link.SupportedAgents.PackedBits)
        {}
 
        FVector Left;
        FVector Right;
        ENavLinkDirection::Type Direction;
        FColor Color;
        float SnapRadius;
        float SnapHeight;
        uint32 SupportedAgentsBits;
    };
    struct FNavLinkSegmentDrawing
    {
        FNavLinkSegmentDrawing() {}
        FNavLinkSegmentDrawing(const FTransform& InLocalToWorld, const FNavigationSegmentLink& Link)
            : LeftStart(InLocalToWorld.TransformPosition(Link.LeftStart))
            , LeftEnd(InLocalToWorld.TransformPosition(Link.LeftEnd))
            , RightStart(InLocalToWorld.TransformPosition(Link.RightStart))
            , RightEnd(InLocalToWorld.TransformPosition(Link.RightEnd))
            , Direction(Link.Direction)
            , Color(UNavArea::GetColor(Link.GetAreaClass()))
            , SnapRadius(Link.SnapRadius)
            , SnapHeight(Link.bUseSnapHeight ? Link.SnapHeight : -1.0f)
            , SupportedAgentsBits(Link.SupportedAgents.PackedBits)
        {}
 
        FVector LeftStart, LeftEnd;
        FVector RightStart, RightEnd;
        ENavLinkDirection::Type Direction;
        FColor Color;
        float SnapRadius;
        float SnapHeight;
        uint32 SupportedAgentsBits;
    };
 
private:
    TArray<FNavLinkDrawing> OffMeshPointLinks;
    TArray<FNavLinkSegmentDrawing> OffMeshSegmentLinks;
 
public:
    NAVIGATIONSYSTEM_API FNavLinkRenderingProxy(const UPrimitiveComponent* InComponent);
    NAVIGATIONSYSTEM_API virtual void GetDynamicMeshElements(const TArray<const FSceneView*>& Views, const FSceneViewFamily& ViewFamily, uint32 VisibilityMap, FMeshElementCollector& Collector) const override;
    NAVIGATIONSYSTEM_API virtual FPrimitiveViewRelevance GetViewRelevance(const FSceneView* View) const override;
    NAVIGATIONSYSTEM_API virtual uint32 GetMemoryFootprint( void ) const override;
    NAVIGATIONSYSTEM_API uint32 GetAllocatedSize( void ) const;
    NAVIGATIONSYSTEM_API void StorePointLinks(const FTransform& LocalToWorld, const TArray<FNavigationLink>& LinksArray);
    NAVIGATIONSYSTEM_API void StoreSegmentLinks(const FTransform& LocalToWorld, const TArray<FNavigationSegmentLink>& LinksArray);
 
    static NAVIGATIONSYSTEM_API void GetLinkMeshes(const TArray<FNavLinkDrawing>& OffMeshPointLinks, const TArray<FNavLinkSegmentDrawing>& OffMeshSegmentLinks, TArray<float>& StepHeights, FMaterialRenderProxy* const MeshColorInstance, int32 ViewIndex, FMeshElementCollector& Collector, uint32 AgentMask);
 
    static NAVIGATIONSYSTEM_API void DrawLinks(FPrimitiveDrawInterface* PDI, TArray<FNavLinkDrawing>& OffMeshPointLinks, TArray<FNavLinkSegmentDrawing>& OffMeshSegmentLinks, TArray<float>& StepHeights, FMaterialRenderProxy* const MeshColorInstance, uint32 AgentMask);
};