Method EvaluateCandidate

Source/CogSample/CogSampleTargetAcquisition.cpp:398–609

--------------------------------------------------------------------------------------------------------------------------

//--------------------------------------------------------------------------------------------------------------------------
bool UCogSampleTargetAcquisition::EvaluateCandidate(
    AActor* Candidate,
    const FCogSampleTargetTargetAcquisitionParams& EvalParams,
    float& CandidateScore,
    bool& bIsCrosshairInsideCandidate) const
{
    TRACE_CPUPROFILER_EVENT_SCOPE(UCogSampleTargetAcquisition::EvaluateCandidate);

    if (EvalParams.TargetsToIgnore.Contains(Candidate))
    {
        return false;
    }

    const FVector CandidateTargetLocation = UCogSampleFunctionLibrary_Gameplay::GetActorTargetLocation(Candidate);

    FVector CandidateLocationDelta = CandidateTargetLocation - EvalParams.SourceLocation;
    if (EvalParams.bWorldDistanceIgnoreZ)
    {
        CandidateLocationDelta.Z = 0.0f;
    }
    const float CandidateWorldDistance = CandidateLocationDelta.Length();
    const FVector CandidateWorldDirection = CandidateWorldDistance > 0.0f ? CandidateLocationDelta / CandidateWorldDistance : FVector::ZeroVector;
    const float ScreenMagnitude = FMath::Min(EvalParams.ViewRect.Width(), EvalParams.ViewRect.Height());
    const bool IsSearchDirectionUsed = bUseSearchDirectionScore && EvalParams.SearchDirectionNormalized.IsNearlyZero() == false;

    //--------------------------------------------------------------------------------------------------------------
    // Filter by world distance limit
    //--------------------------------------------------------------------------------------------------------------        
    if (CandidateWorldDistance > EvalParams.MaxWorldDistance)
    {
        IF_COG(FCogDebugDraw::String(LogCogTargetAcquisition, EvalParams.Controller, FString::Printf(TEXT("Dist: %0.2f"), CandidateWorldDistance * 0.01f), CandidateTargetLocation, FColor::Red, EvalParams.IsDebugPersistent));
        return false;
    }

    //--------------------------------------------------------------------------------------------------------------
    // Filter candidates base on yaw limit when using yaw, otherwise filter anyone behind the character
    //--------------------------------------------------------------------------------------------------------------
    const FVector CandidateWorldDirectionFlat = CandidateWorldDirection.GetSafeNormal2D();
    const float CandidateDot = EvalParams.YawDirection.Dot(CandidateWorldDirectionFlat);
    const float CandidateYaw = FRotator::NormalizeAxis(FMath::RadiansToDegrees(FMath::Acos(CandidateDot)));
    if (bUseYawLimit && CandidateYaw > YawMax)
    {
        IF_COG(FCogDebugDraw::String(LogCogTargetAcquisition, EvalParams.Controller, FString::Printf(TEXT("Yaw: %0.2f"), CandidateYaw), CandidateTargetLocation, FColor::Red, EvalParams.IsDebugPersistent));
        return false;
    }

    //--------------------------------------------------------------------------------------------------------------
    // Find the candidate screen location. If the result distance is lower than zero, it means the crosshair is
    // inside the candidate capsules.
    //--------------------------------------------------------------------------------------------------------------
    FVector2D CandidateScreenLocation;
    FVector2D CandidateClosestScreenLocation;
    float CandidateClosestScreenDistance;
    const UCapsuleComponent* CandidateBestHitZone = nullptr;
    if (!ComputeCandidateScreenLocation(Candidate, EvalParams, CandidateTargetLocation, CandidateScreenLocation, CandidateClosestScreenLocation, CandidateClosestScreenDistance))
    {
        return false;
    }