基于UGameplayStatics

• 根据 Object Type，算出抛物线的点集合和检测结果

  static bool Blueprint_PredictProjectilePath_ByObjectType(
      const UObject* WorldContextObject,
      FHitResult& OutHit,
      TArray<FVector>& OutPathPositions,
      FVector& OutLastTraceDestination,
      FVector StartPos,
      FVector LaunchVelocity,
      bool bTracePath,
      float ProjectileRadius,
      const TArray<TEnumAsByte<EObjectTypeQuery> >& ObjectTypes,
      bool bTraceComplex,
      const TArray<AActor*>& ActorsToIgnore,
      EDrawDebugTrace::Type DrawDebugType,
      float DrawDebugTime,
      float SimFrequency = 15.f,
      float MaxSimTime = 2.f,
      float OverrideGravityZ = 0
  );

• 代码实现

  FVector BeginLoc = GetActorLocation();
  FVector LaunchVelocity = GetActorForwardVector() * 1000.0f;
  TArray<TEnumAsByte<EObjectTypeQuery> > ObjectTypes;
  ObjectTypes.Add(EObjectTypeQuery::ObjectTypeQuery1);
  TArray<AActor*> IgnoreActors;    
  
  FHitResult HitResult;
  TArray<FVector> OutPatnPositions;
  FVector OutLastTraceDestination;
  
  //开始模拟
  bool bIsHit = UGameplayStatics::Blueprint_PredictProjectilePath_ByObjectType(
      GetWorld(),
      HitResult,
      OutPatnPositions,
      OutLastTraceDestination,
      BeginLoc,
      LaunchVelocity,
      true,
      0.0f,
      ObjectTypes,
      false,
      IgnoreActors,
      EDrawDebugTrace::ForDuration,
      0.0f
  );
  if (bIsHit)
  {
      UKismetSystemLibrary::PrintString(GetWorld(), HitResult.GetActor()->GetName());
  }

• 根据 ChannelChannel，算出抛物线的点集合和检测结果

  static bool Blueprint_PredictProjectilePath_ByTraceChannel(
      const UObject* WorldContextObject,
      FHitResult& OutHit,
      TArray<FVector>& OutPathPositions,
      FVector& OutLastTraceDestination,
      FVector StartPos,
      FVector LaunchVelocity,
      bool bTracePath,
      float ProjectileRadius,
      TEnumAsByte<ECollisionChannel> TraceChannel,
      bool bTraceComplex,
      const TArray<AActor*>& ActorsToIgnore,
      EDrawDebugTrace::Type DrawDebugType,
      float DrawDebugTime,
      float SimFrequency = 15.f,
      float MaxSimTime = 2.f,
      float OverrideGravityZ = 0
  );

• 根据预测参数，推算结果

  /**
      * Predict the arc of a virtual projectile affected by gravity with collision checks along the arc.
      * Returns true if it hit something.
      *
      * @param PredictParams              Input params to the trace (start location, velocity, time to simulate, etc).
      * @param PredictResult              Output result of the trace (Hit result, array of location/velocity/times for each trace step, etc).
      * @return                           True if hit something along the path (if tracing with collision).
      */
  
  static bool PredictProjectilePath(
      const UObject* WorldContextObject,
      const FPredictProjectilePathParams& PredictParams,
      FPredictProjectilePathResult& PredictResult
  );

• 根据预测参数，推算结果

  static bool Blueprint_PredictProjectilePath_Advanced(
      const UObject* WorldContextObject,
      const FPredictProjectilePathParams& PredictParams,
      FPredictProjectilePathResult& PredictResult
  );

• 根据目标点，反算初速度

  static bool BlueprintSuggestProjectileVelocity(
      const UObject* WorldContextObject,
      FVector& TossVelocity,
      FVector StartLocation,
      FVector EndLocation,
      float LaunchSpeed,
      float OverrideGravityZ,
      ESuggestProjVelocityTraceOption::Type TraceOption,
      float CollisionRadius,
      bool bFavorHighArc,
      bool bDrawDebug
  );

• 根据目标点，反算初速度

  static bool SuggestProjectileVelocity_CustomArc(
      const UObject* WorldContextObject,
      FVector& OutLaunchVelocity,
      FVector StartPos,
      FVector EndPos,
      float OverrideGravityZ = 0,
      float ArcParam = 0.5f
  );