void UEnvQueryGenerator_OnCircle::GenerateItems(FEnvQueryInstance& QueryInstance) const
{
float AngleDegree = 360.f;
float RadiusValue = 0.f;
float ItemSpace = 1.0f;
if (QueryInstance.GetParamValue(Angle, AngleDegree, TEXT("Angle")) == false
|| QueryInstance.GetParamValue(Radius, RadiusValue, TEXT("Radius")) == false
|| QueryInstance.GetParamValue(ItemSpacing, ItemSpace, TEXT("ItemSpacing")) == false
|| AngleDegree <= 0.f || AngleDegree > 360.f
|| RadiusValue <= 0.f)
{
return;
}
AngleRadians = FMath::DegreesToRadians(Angle.Value);
// first generate points on a circle
const float CircumferenceLength = 2.f * PI * RadiusValue;
const float ArcAnglePercentage = Angle.Value / 360.f;
const float ArcLength = CircumferenceLength * ArcAnglePercentage;
const int32 StepsCount = FMath::CeilToInt(ArcLength / ItemSpace) + 1;
const float AngleStep = AngleDegree / (StepsCount - 1);
FVector StartDirection = CalcDirection(QueryInstance);
TArray<FVector> CenterLocationCandidates;
QueryInstance.PrepareContext(CircleCenter, CenterLocationCandidates);
StartDirection = StartDirection.RotateAngleAxis(-AngleDegree/2, FVector::UpVector) * RadiusValue;
int NumCenterLocations = CenterLocationCandidates.Num();
if (NumCenterLocations > 0)
{
for (int i = 0; i < NumCenterLocations; ++i)
{
GenerateItemsForCircle(CenterLocationCandidates[i], StartDirection, StepsCount, AngleStep, QueryInstance);
}
}
else
{
FVector CenterLocation(0);
AActor* Querier = Cast<AActor>(QueryInstance.Owner.Get());
if (Querier)
{
CenterLocation = Querier->GetActorLocation();
}
GenerateItemsForCircle(CenterLocation, StartDirection, StepsCount, AngleStep, QueryInstance);
}
}
void UEnvQueryGenerator_OnCircle::GenerateItems(FEnvQueryInstance& QueryInstance) const
{
CircleRadius.BindData(QueryInstance.Owner.Get(), QueryInstance.QueryID);
SpaceBetween.BindData(QueryInstance.Owner.Get(), QueryInstance.QueryID);
ArcAngle.BindData(QueryInstance.Owner.Get(), QueryInstance.QueryID);
float AngleDegree = ArcAngle.GetValue();
float RadiusValue = CircleRadius.GetValue();
float ItemSpace = SpaceBetween.GetValue();
if ((AngleDegree <= 0.f) || (AngleDegree > 360.f) || (RadiusValue <= 0.f) || (ItemSpace <= 0.f))
{
return;
}
AngleRadians = FMath::DegreesToRadians(AngleDegree);
// first generate points on a circle
const float CircumferenceLength = 2.f * PI * RadiusValue;
const float ArcAnglePercentage = AngleDegree / 360.f;
const float ArcLength = CircumferenceLength * ArcAnglePercentage;
const int32 StepsCount = FMath::CeilToInt(ArcLength / ItemSpace) + 1;
const float AngleStep = AngleDegree / (StepsCount - 1);
FVector StartDirection = CalcDirection(QueryInstance);
StartDirection = StartDirection.RotateAngleAxis(-AngleDegree/2, FVector::UpVector) * RadiusValue;
// gather context with raw data, so it can be used by derived generators
FEnvQueryContextData ContextData;
const bool bSuccess = QueryInstance.PrepareContext(CircleCenter, ContextData);
if (bSuccess && ContextData.ValueType && ContextData.ValueType->IsChildOf(UEnvQueryItemType_VectorBase::StaticClass()))
{
UEnvQueryItemType_VectorBase* DefTypeOb = (UEnvQueryItemType_VectorBase*)ContextData.ValueType->GetDefaultObject();
const uint16 DefTypeValueSize = DefTypeOb->GetValueSize();
uint8* RawData = ContextData.RawData.GetData();
for (int32 ValueIndex = 0; ValueIndex < ContextData.NumValues; ValueIndex++)
{
const FVector ContextItemLocation = DefTypeOb->GetItemLocation(RawData);
GenerateItemsForCircle(RawData, DefTypeOb, ContextItemLocation, StartDirection, StepsCount, AngleStep, QueryInstance);
RawData += DefTypeValueSize;
}
}
}
