111 lines
3.7 KiB
C++
111 lines
3.7 KiB
C++
// Copyright 2025 https://yuewu.dev/en All Rights Reserved.
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#pragma once
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#include "Components/ActorComponent.h"
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#include "GameFramework/Actor.h"
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#include "GCMS_CameraSystemComponent.generated.h"
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class UCameraComponent;
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class USpringArmComponent;
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class UCanvas;
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class AHUD;
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class UGCMS_CameraMode;
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class UGCMS_CameraModeStack;
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class UObject;
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struct FFrame;
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struct FGameplayTag;
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struct FMinimalViewInfo;
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template <class TClass>
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class TSubclassOf;
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DECLARE_DELEGATE_RetVal(TSubclassOf<UGCMS_CameraMode>, FGMSCameraModeDelegate);
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/**
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* UGCMS_CameraSystemComponent
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*
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* The base camera component class used by GMS camera system.
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*/
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UCLASS(ClassGroup=GCMS, meta=(BlueprintSpawnableComponent))
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class GENERICCAMERASYSTEM_API UGCMS_CameraSystemComponent : public UActorComponent
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{
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GENERATED_BODY()
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public:
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UGCMS_CameraSystemComponent(const FObjectInitializer& ObjectInitializer);
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static void OnShowDebugInfo(AHUD* HUD, UCanvas* Canvas, const FDebugDisplayInfo& DisplayInfo, float& YL, float& YPos);
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// Returns the camera component if one exists on the specified actor.
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UFUNCTION(BlueprintCallable, BlueprintPure, Category = "GCMS|Camera", meta=(DefaultToSelf="Actor"))
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static UGCMS_CameraSystemComponent* GetCameraSystemComponent(const AActor* Actor) { return (Actor ? Actor->FindComponentByClass<UGCMS_CameraSystemComponent>() : nullptr); }
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/**
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* Returns the target actor that the camera is looking at.
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*/
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virtual AActor* GetTargetActor() const { return GetOwner(); }
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// Delegate used to query for the best camera mode.
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FGMSCameraModeDelegate DetermineCameraModeDelegate;
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// Add an offset to the field of view. The offset is only for one frame, it gets cleared once it is applied.
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void AddFieldOfViewOffset(float FovOffset) { FieldOfViewOffset += FovOffset; }
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// Push specified Camera Mode.
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UFUNCTION(BlueprintCallable, Category="GCMS|Camera")
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void PushCameraMode(TSubclassOf<UGCMS_CameraMode> NewCameraMode);
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UFUNCTION(BlueprintCallable, Category="GCMS|Camera")
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void PushDefaultCameraMode();
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/**
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* Initialize it with camera component and sprint arm component.
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*/
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UFUNCTION(BlueprintCallable, Category="GCMS|Camera")
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void Initialize(UCameraComponent* NewCameraComponent, USpringArmComponent* NewSpringArmComponent);
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virtual void DrawDebug(UCanvas* Canvas) const;
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/**
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* Gets the camera mode tag associated with the top layer and the blend weight of it
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* 返回顶层相机模式的tag和当前权重。
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*/
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UFUNCTION(BlueprintCallable, BlueprintPure, Category="GCMS|Camera")
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void GetBlendInfo(float& OutWeightOfTopLayer, FGameplayTag& OutTagOfTopLayer) const;
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UFUNCTION(BlueprintCallable, BlueprintPure, Category="GCMS|Camera")
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UCameraComponent* GetAssociatedCamera() const;
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UFUNCTION(BlueprintCallable, BlueprintPure, Category="GCMS|Camera")
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USpringArmComponent* GetAssociatedSprintArm() const;
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virtual void Activate(bool bReset) override;
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virtual void Deactivate() override;
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protected:
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virtual void OnRegister() override;
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virtual void TickComponent(float DeltaTime, ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction) override;
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virtual void UpdateCameraModes();
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protected:
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UPROPERTY()
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TObjectPtr<UCameraComponent> AssociatedCameraComponent;
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UPROPERTY()
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TObjectPtr<USpringArmComponent> AssociatedSprintArmComponent;
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// Stack used to blend the camera modes.
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UPROPERTY(VisibleInstanceOnly, BlueprintReadOnly, Category="GCMS|Camera", meta=(ShowInnerProperties))
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TObjectPtr<UGCMS_CameraModeStack> CameraModeStack;
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// Default camera mode will used.
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UPROPERTY(EditAnywhere, BlueprintReadOnly, Category="GCMS|Camera")
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TSubclassOf<UGCMS_CameraMode> DefaultCameraMode;
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// Offset applied to the field of view. The offset is only for one frame, it gets cleared once it is applied.
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float FieldOfViewOffset;
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};
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