WeaponInstanceTrace.h

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// Copyright Blue Isle Studios Inc 2018. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "CollisionQueryParams.h"
#include "Weapons/WeaponInstanceRanged.h"
#include "WeaponInstanceTrace.generated.h"
 
UCLASS()
class PROJECTX_API UWeaponInstanceTrace : public UWeaponInstanceRanged
{
    GENERATED_UCLASS_BODY()
    
public:
    virtual void BeginPlay() override;
 
    virtual TSubclassOf<class UDamageType> GetDamageType() const override;
 
    virtual void PrimaryFire(uint8 RemainingBurstCount) override;
 
    FORCEINLINE class UDataTable* GetImpactEffectTable() const { return ImpactEffectTable; }
 
protected:
    virtual FCollisionQueryParams GetCollisionQueryParams() const;
 
    virtual void PerformWeaponTrace();
 
    virtual void WeaponTraceSingle();
    virtual void WeaponTraceMulti();
 
    virtual bool TraceSingle(FHitResult& HitResult, const FVector& Start, FVector& End, const ECollisionChannel& TraceChannel, const FCollisionQueryParams& Params);
    virtual bool TraceMulti(TArray<FHitResult>& HitResults, const FVector& Start, FVector& End, const ECollisionChannel& TraceChannel, const FCollisionQueryParams& Params);
 
    virtual void SpawnTraceCosmetics(UPhysicalMaterial* PhysicalMaterial, const FVector& ImpactNormal, const FVector& EndLocation);
 
    UFUNCTION(Server, Reliable, WithValidation)
    virtual void Server_Reliabe_TraceHit(const TArray<FHitResult>& HitResults);
 
    virtual bool ValidateTrace(const FHitResult& Impact) const;
 
protected:
    /* How far the weapon trace should be made. */
    UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category = "Trace Weapon")
    float TraceRange = 20000.0f;
    /* The weapon will continue line checking past a target even if it has a hit. */
    UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category = "Trace Weapon")
    bool bPenetratingTrace = false;
    /* How many traces the weapon makes and applies damage with. The number of traces will divide the total damage dealt. Every trace will have to hit to deal full damage. */
    UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category = "Trace Weapon")
    int32 TraceCount = 1;
 
    /* Determines if this trace should have an extent (has a thickness) */
    UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category = "Trace Weapon|Extent")
    bool bExtentTrace = false;
    /* How large should the extent of this trace be? */
    UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category = "Trace Weapon|Extent", meta = (EditCondition = "bExtentTrace"))
    float TraceExtent = 0.f;
    /* If true will use a zero-extent trace to determine world collision. */
    UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category = "Trace Weapon|Extent", meta = (EditCondition = "bExtentTrace"))
    bool bUseZeroExtentForWorldCollision = false;
 
    /* Emitter that should be used for the weapon's trace */
    UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category = "Trace Weapon|Effects")
    UParticleSystem* TraceEmitter;
    /* Where on the weapon to attach the Weapon Trace Emitter */
    UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category = "Trace Weapon|Effects")
    FName TraceEmitterSocket = "Muzzle";
    /* Impact effects table. */
    UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category = "Trace Weapon|Effects")
    class UDataTable* ImpactEffectTable = NULL;
};