Added spawn raycasting, correct facing and spacing

Source/SpaceBattler/Private/PartySubsystem.cpp

@@ -3,6 +3,8 @@
 
 #include "PartySubsystem.h"
 
+#include "Kismet/GameplayStatics.h"
+
 void UPartySubsystem::AddToParty(UUnitInfo* UnitInfo)
 {
 	for (FPartyMember &Unit : Members)
@@ -32,7 +34,13 @@ int32 UPartySubsystem::SpawnParty(const float InVerticalSpacing, const float InH
 	this->HorizontalOffset = InHorizontalOffset;
 	this->NumRows = InNumRows;
 	this->HorizontalSpacing = InHorizontalSpacing;
+	CurrentColumn = 0;
+	SpawnQueue.Empty();
 
+	TArray<AActor*> SpawnPoints;
+	UGameplayStatics::GetAllActorsWithTag(GetWorld(), "PlayerSpawn", SpawnPoints);
+	SpawnPoint = SpawnPoints[0];
+	
 	for (FPartyMember &Unit : GetMembers())
 	{
 		for(auto i = 0; i < GetMemberAllocated(Unit); i++)
@@ -41,7 +49,7 @@ int32 UPartySubsystem::SpawnParty(const float InVerticalSpacing, const float InH
 		}
 	}
 
-	const auto NumUnits= SpawnQueue.Num();
+	const int32 NumUnits = SpawnQueue.Num();
 	
 	SpawnUnits();
 	GetWorld()->GetTimerManager().SetTimer(
@@ -68,8 +76,22 @@ void UPartySubsystem::SpawnUnits()
 		FActorSpawnParameters SpawnActorParameters = {};
 		SpawnActorParameters.SpawnCollisionHandlingOverride = ESpawnActorCollisionHandlingMethod::AdjustIfPossibleButAlwaysSpawn;
 		
-		FVector Location = FVector( VerticalSpacing * i - VerticalSpacing, -HorizontalOffset * CurrentColumn, 1000);
+		FVector Location = SpawnPoint->GetActorLocation() + FVector(i * -VerticalSpacing, -HorizontalOffset * CurrentColumn, 300);
-		GetWorld()->SpawnActor(SpawnQueue[i + LastSpawnIndex], &Location, nullptr, SpawnActorParameters);
+		FRotator Rotation = FRotator(0, 90.0f, 0);
+		
+		AActor* NewActor = GetWorld()->SpawnActor(SpawnQueue[i + LastSpawnIndex], &Location, &Rotation, SpawnActorParameters);
+
+		FHitResult Hit;
+		FVector TraceStart = NewActor->GetActorLocation();
+		FVector TraceEnd = -NewActor->GetActorUpVector() * 10000.0f;
+		FCollisionQueryParams QueryParams;
+		QueryParams.AddIgnoredActor(NewActor);
+
+		NewActor->GetWorld()->LineTraceSingleByChannel(Hit, TraceStart, TraceEnd, ECC_WorldStatic, QueryParams);
+		if(Hit.bBlockingHit)
+		{
+			NewActor->SetActorLocation(Hit.Location, true, nullptr, ETeleportType::ResetPhysics);
+		}
 	}
 
 	LastSpawnIndex += NumRows;

Source/SpaceBattler/Private/WaveSubsystem.cpp

@@ -3,6 +3,8 @@
 
 #include "WaveSubsystem.h"
 
+#include "Kismet/GameplayStatics.h"
+
 void UWaveSubsystem::Init(const TArray<UWave*> InWaves, const int32 CurrWave = 0)
 {
 	CurrentWave = CurrWave;
@@ -16,6 +18,11 @@ int32 UWaveSubsystem::SpawnWave(const float InVerticalSpacing, const float InHor
 	VerticalSpacing = InVerticalSpacing;
 	SpawnQueue = Waves[CurrentWave]->GetUnits();
 	const auto NumUnits = SpawnQueue.Num(); 
+	CurrentColumn = 0;
+	
+	TArray<AActor*> SpawnPoints;
+	UGameplayStatics::GetAllActorsWithTag(GetWorld(), "EnemySpawn", SpawnPoints);
+	SpawnPoint = SpawnPoints[0];
 	
 	SpawnUnits();
 	GetWorld()->GetTimerManager().SetTimer(
@@ -36,15 +43,33 @@ void UWaveSubsystem::SpawnUnits()
 		if(i + LastSpawnIndex >= SpawnQueue.Num())
 		{
 			GetWorld()->GetTimerManager().ClearTimer(SpawnTimerHandle);
+			LastSpawnIndex += i;
 			return;
 		}
+
+		FActorSpawnParameters SpawnActorParameters = {};
+		SpawnActorParameters.SpawnCollisionHandlingOverride = ESpawnActorCollisionHandlingMethod::AdjustIfPossibleButAlwaysSpawn;
+
+		FVector Location = SpawnPoint->GetActorLocation() + FVector(i * -VerticalSpacing, -HorizontalOffset * CurrentColumn, 300);
+		FRotator Rotation = FRotator(0,-90.0f, 0);
+		AActor* NewEnemy = GetWorld()->SpawnActor(SpawnQueue[i + LastSpawnIndex]->GetCharacterClass(), &Location, &Rotation, SpawnActorParameters);
 		
-		FVector Location = FVector(VerticalSpacing * i - VerticalSpacing, HorizontalOffset, 0);
-		AActor* NewEnemy = GetWorld()->SpawnActor(SpawnQueue[i + LastSpawnIndex]->GetCharacterClass(), &Location);
 		if(NewEnemy != nullptr)
 		{
 			NewEnemy->Tags.Add(TEXT("enemy"));
 		}
+
+		FHitResult Hit;
+		FVector TraceStart = NewEnemy->GetActorLocation();
+		FVector TraceEnd = -NewEnemy->GetActorUpVector() * 10000.0f;
+		FCollisionQueryParams QueryParams;
+		QueryParams.AddIgnoredActor(NewEnemy);
+
+		NewEnemy->GetWorld()->LineTraceSingleByChannel(Hit, TraceStart, TraceEnd, ECC_WorldStatic, QueryParams);
+		if(Hit.bBlockingHit)
+		{
+			NewEnemy->SetActorLocation(Hit.Location, true, nullptr, ETeleportType::ResetPhysics);
+		}
 	}
 
 	LastSpawnIndex += NumRows;

Source/SpaceBattler/Public/PartySubsystem.h

@@ -78,6 +78,9 @@ protected:
 
 	UPROPERTY(BlueprintReadWrite, EditAnywhere)
 	int32 Credits;
+
+	UPROPERTY()
+	AActor* SpawnPoint;
 	
 	FTimerHandle SpawnTimerHandle;
 	int32 LastSpawnIndex;

Source/SpaceBattler/Public/WaveSubsystem.h

@@ -20,7 +20,7 @@ public:
 
 	UFUNCTION(BlueprintCallable)
 	int32 SpawnWave(float InVerticalSpacing, float InHorizontalOffset, int InNumRows);
-
+	
 protected:
 	void SpawnUnits();
 	
@@ -35,10 +35,14 @@ protected:
 
 	UPROPERTY(BlueprintReadWrite)
 	UPrimaryDataAsset* SelectedStage;
+
+	UPROPERTY()
+	AActor* SpawnPoint;
 	
 	FTimerHandle SpawnTimerHandle;
 	int32 NumRows;
 	int32 LastSpawnIndex;
 	float VerticalSpacing;
 	float HorizontalOffset;
+	int32 CurrentColumn;
 };