CameraStackTypes.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "UObject/ObjectMacros.h"
#include "CameraStackTypes.generated.h"
 
class APlayerCameraManager;
 
// NOTE:
// This code is work in progress - do not use these types until this comment is removed.
 
USTRUCT()
struct FDummySpacerCameraTypes
{
    GENERATED_USTRUCT_BODY()
};
 
 
//@TODO: Document
UENUM()
namespace ECameraAlphaBlendMode
{
    enum Type : int
    {
        CABM_Linear UMETA(DisplayName="Linear"),
        CABM_Cubic UMETA(DisplayName="Cubic")
    };
}
 
// Used to update camera entries in the camera stack
struct FCameraUpdateContext
{
private:
    float TrueCurrentWeight;
    float NonDebugCurrentWeight;
    float DeltaTime;
    APlayerCameraManager* Camera;
 
public:
    FCameraUpdateContext(APlayerCameraManager* InCamera, float InDeltaTime)
        : TrueCurrentWeight(1.0f)
        , NonDebugCurrentWeight(1.0f)
        , DeltaTime(InDeltaTime)
        , Camera(InCamera)
    {
    }
 
    FCameraUpdateContext FractionalWeight(float Multiplier, bool bFromDebugNode) const
    {
        FCameraUpdateContext Result(Camera, DeltaTime);
        Result.TrueCurrentWeight = TrueCurrentWeight * Multiplier;
        Result.NonDebugCurrentWeight = NonDebugCurrentWeight * (bFromDebugNode ? 1.0f : Multiplier);
 
        return Result;
    }
 
    // Returns the final blend weight contribution for this stage
    float GetTrueWeight() const { return TrueCurrentWeight; }
 
    // Returns the final blend weight contribution for this stage (ignoring debug cameras)
    float GetNonDebugWeight() const { return NonDebugCurrentWeight; }
 
    // Returns the delta time for this update, in seconds
    float GetDeltaTime() const { return DeltaTime; }
 
    // Returns the camera stack
    //@TODO: Hack to work around current view target construction...
    APlayerCameraManager* GetCameraManager() const { return Camera; }
};