ProjectXAIPerception.h

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// Copyright 2017 Blue Isle Studios, Inc. All Rights Reserved.
 
#pragma once
 
#include "Components/ActorComponent.h"
#include "ProjectXAIPerception.generated.h"
 
class APlayerState;
class AProjectXAIController;
 
#define ECC_AISight ECC_GameTraceChannel4
 
UENUM(BlueprintType)
enum class EStimulusType : uint8
{
    None = 0,
    Sight = 1,
    Hearing = 2,
    Damage = 3
};
 
USTRUCT(BlueprintType, meta = (DisplayName = "Stimulus Data"))
struct FPerceptionStimulus
{
    GENERATED_USTRUCT_BODY()
 
    UPROPERTY(BlueprintReadWrite, Category = "AI|Perception")
    float Strength;
 
    UPROPERTY(BlueprintReadWrite, Category = "AI|Perception")
    EStimulusType StimulusType;
};
 
USTRUCT(BlueprintType, meta = (DisplayName = "Sensed Actor's Data"))
struct FProjectXPerceptionInfo
{
    GENERATED_USTRUCT_BODY()
 
    UPROPERTY(BlueprintReadWrite, Category = "AI|Perception")
    AActor* Target;
 
    UPROPERTY(BlueprintReadWrite, Category = "AI|Perception")
    TArray<FPerceptionStimulus> LastSensedStimuli;
 
    FProjectXPerceptionInfo() : Target(nullptr)
    {}
 
    bool operator==(const FProjectXPerceptionInfo& rhs) const
    {
        return Target && Target == rhs.Target;
    }
};
 
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FPerceptionUpdateSignature, TArray<FProjectXPerceptionInfo>, UpdatedActors);
 
UCLASS( ClassGroup=(Custom), meta=(BlueprintSpawnableComponent) )
class PROJECTX_API UProjectXAIPerception : public UActorComponent
{
    GENERATED_BODY()
 
public: 
    UProjectXAIPerception();
 
    bool PassesConeCheck(const FVector ActorLocation, const FVector StartLocation, const FVector LookDirection) const;
    UFUNCTION()
    void ReportDamageEvent(class AActor* Victim, const float Damage, struct FDamageEvent const& DamageEvent, const class AController* EventInstigator, const class AActor* DamageCauser, const class APlayerState* InstigatorPlayerState);
    UFUNCTION()
    void OnPawnPosessed(APawn* InPawn);
protected:
    virtual void BeginPlay() override;
 
    TArray<FProjectXPerceptionInfo> PercievedActors;
    AProjectXAIController* AIController;
    float PeripheralVisionAngleCos;
    float SquareVisionRange;
 
public: 
    virtual void TickComponent(float DeltaTime, ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction) override;
 
    /* How far can the creature see? Setting this and hearing range to zero will effectively turn off perception (aside from damage) */
    UPROPERTY(BlueprintReadWrite, EditDefaultsOnly, Category = "Perception")
    float VisionRange = 2000.0f;
    /* Added weight to the perception if the target is armored */
    UPROPERTY(BlueprintReadWrite, EditDefaultsOnly, Category = "Perception")
    float ArmorMaxStrength = 0.0f;
    /* Added weight to the perception if the target is damaged */
    UPROPERTY(BlueprintReadWrite, EditDefaultsOnly, Category = "Perception")
    float TargetDamagedMaxStrength = 0.0f;
    /* Weight of the perception, this is accounted into threat for creature combat */
    UPROPERTY(BlueprintReadWrite, EditDefaultsOnly, Category = "Perception")
    float SightMaxStrength = 2.0f;
    /* Weight of the perception, this is accounted into threat for creature combat */
    UPROPERTY(BlueprintReadWrite, EditDefaultsOnly, Category = "Perception")
    float SightMaxStrengthAlly = 2.0f;
    /* Half the degrees of the desired cone check*/
    UPROPERTY(BlueprintReadWrite, EditDefaultsOnly, Category = "Perception")
    float PeripheralVisionAngleDegrees = 90.0f;
    /* How many vision traces are allowed per check. Increasing this will affect performance */
    UPROPERTY(BlueprintReadWrite, EditDefaultsOnly, Category = "Perception")
    int32 MaxVisionTargets = 3;
 
    /* How far can the creature hear? */
    UPROPERTY(BlueprintReadWrite, EditDefaultsOnly, Category = "Perception")
    float HearingRange = 700.0f;
    /* Weight of the perception, this is accounted into threat for creature combat */
    UPROPERTY(BlueprintReadWrite, EditDefaultsOnly, Category = "Perception")
    float HearingMaxStrength = 3.0f;
    /* Weight of the perception, this is accounted into threat for creature combat */
    UPROPERTY(BlueprintReadWrite, EditDefaultsOnly, Category = "Perception")
    float HearingMaxStrengthAlly = 3.0f;
    /* Weight of the perception, this is accounted into threat for creature combat */
    UPROPERTY(BlueprintReadWrite, EditDefaultsOnly, Category = "Perception")
    float DamageMaxStrength = 10.0f;
 
    UPROPERTY(BlueprintAssignable, Category = "Perception Events")
    FPerceptionUpdateSignature OnPerceptionUpdated;
 
private:
    void UpdateTargetVisibilityInfo();
};