Add Ground Zero map boundary

Source/AgrarianGame/AgrarianMapBoundaryVolume.cpp

@@ -0,0 +1,103 @@
+// Copyright Pacificao. All Rights Reserved.
+
+#include "AgrarianMapBoundaryVolume.h"
+#include "AgrarianGameCharacter.h"
+#include "Components/BoxComponent.h"
+#include "GameFramework/CharacterMovementComponent.h"
+#include "Kismet/GameplayStatics.h"
+
+AAgrarianMapBoundaryVolume::AAgrarianMapBoundaryVolume()
+{
+	PrimaryActorTick.bCanEverTick = true;
+	bReplicates = false;
+
+	BoundaryVolume = CreateDefaultSubobject<UBoxComponent>(TEXT("BoundaryVolume"));
+	RootComponent = BoundaryVolume;
+	BoundaryVolume->SetBoxExtent(FVector(50000.0f, 50000.0f, 25000.0f));
+	BoundaryVolume->SetCollisionEnabled(ECollisionEnabled::NoCollision);
+	BoundaryVolume->SetHiddenInGame(false);
+	BoundaryVolume->ShapeColor = FColor::Yellow;
+}
+
+void AAgrarianMapBoundaryVolume::Tick(float DeltaSeconds)
+{
+	Super::Tick(DeltaSeconds);
+
+	if (!HasAuthority() || !bClampPlayersAtBoundary)
+	{
+		return;
+	}
+
+	TArray<AActor*> Characters;
+	UGameplayStatics::GetAllActorsOfClass(this, AAgrarianGameCharacter::StaticClass(), Characters);
+	for (AActor* Actor : Characters)
+	{
+		EnforceBoundaryForCharacter(Cast<AAgrarianGameCharacter>(Actor));
+	}
+}
+
+bool AAgrarianMapBoundaryVolume::IsLocationOutsideBoundary(const FVector& WorldLocation) const
+{
+	if (!BoundaryVolume)
+	{
+		return false;
+	}
+
+	const FVector LocalLocation = GetActorTransform().InverseTransformPosition(WorldLocation);
+	const FVector Extent = BoundaryVolume->GetUnscaledBoxExtent();
+	return FMath::Abs(LocalLocation.X) > Extent.X
+		|| FMath::Abs(LocalLocation.Y) > Extent.Y
+		|| FMath::Abs(LocalLocation.Z) > Extent.Z;
+}
+
+bool AAgrarianMapBoundaryVolume::IsLocationInsideWarningZone(const FVector& WorldLocation) const
+{
+	if (!BoundaryVolume)
+	{
+		return false;
+	}
+
+	const FVector LocalLocation = GetActorTransform().InverseTransformPosition(WorldLocation);
+	const FVector Extent = BoundaryVolume->GetUnscaledBoxExtent();
+	if (FMath::Abs(LocalLocation.X) > Extent.X || FMath::Abs(LocalLocation.Y) > Extent.Y)
+	{
+		return true;
+	}
+
+	return FMath::Abs(LocalLocation.X) >= Extent.X - WarningDistanceCm
+		|| FMath::Abs(LocalLocation.Y) >= Extent.Y - WarningDistanceCm;
+}
+
+FVector AAgrarianMapBoundaryVolume::ClampLocationToBoundary(const FVector& WorldLocation) const
+{
+	if (!BoundaryVolume)
+	{
+		return WorldLocation;
+	}
+
+	const FVector Extent = BoundaryVolume->GetUnscaledBoxExtent();
+	const float SafePadding = FMath::Clamp(BoundaryPaddingCm, 0.0f, FMath::Min(Extent.X, Extent.Y) * 0.5f);
+	const FVector LocalLocation = GetActorTransform().InverseTransformPosition(WorldLocation);
+	const FVector ClampedLocalLocation(
+		FMath::Clamp(LocalLocation.X, -Extent.X + SafePadding, Extent.X - SafePadding),
+		FMath::Clamp(LocalLocation.Y, -Extent.Y + SafePadding, Extent.Y - SafePadding),
+		FMath::Clamp(LocalLocation.Z, -Extent.Z + SafePadding, Extent.Z - SafePadding));
+
+	return GetActorTransform().TransformPosition(ClampedLocalLocation);
+}
+
+void AAgrarianMapBoundaryVolume::EnforceBoundaryForCharacter(AAgrarianGameCharacter* Character) const
+{
+	if (!Character || !IsLocationOutsideBoundary(Character->GetActorLocation()))
+	{
+		return;
+	}
+
+	const FVector ClampedLocation = ClampLocationToBoundary(Character->GetActorLocation());
+	Character->TeleportTo(ClampedLocation, Character->GetActorRotation(), false, true);
+
+	if (UCharacterMovementComponent* Movement = Character->GetCharacterMovement())
+	{
+		Movement->StopMovementImmediately();
+	}
+}

Source/AgrarianGame/AgrarianMapBoundaryVolume.h

@@ -0,0 +1,48 @@
+// Copyright Pacificao. All Rights Reserved.
+
+#pragma once
+
+#include "CoreMinimal.h"
+#include "GameFramework/Actor.h"
+#include "AgrarianMapBoundaryVolume.generated.h"
+
+class AAgrarianGameCharacter;
+class UBoxComponent;
+
+UCLASS(Blueprintable)
+class AGRARIANGAME_API AAgrarianMapBoundaryVolume : public AActor
+{
+	GENERATED_BODY()
+
+public:
+	AAgrarianMapBoundaryVolume();
+
+	virtual void Tick(float DeltaSeconds) override;
+
+	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "Agrarian|Map Boundary")
+	TObjectPtr<UBoxComponent> BoundaryVolume;
+
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Agrarian|Map Boundary")
+	FName BoundaryId = TEXT("ground_zero_mvp_tile");
+
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Agrarian|Map Boundary")
+	bool bClampPlayersAtBoundary = true;
+
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Agrarian|Map Boundary", meta = (ClampMin = "0"))
+	float BoundaryPaddingCm = 250.0f;
+
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Agrarian|Map Boundary", meta = (ClampMin = "0"))
+	float WarningDistanceCm = 3000.0f;
+
+	UFUNCTION(BlueprintCallable, Category = "Agrarian|Map Boundary")
+	bool IsLocationOutsideBoundary(const FVector& WorldLocation) const;
+
+	UFUNCTION(BlueprintCallable, Category = "Agrarian|Map Boundary")
+	bool IsLocationInsideWarningZone(const FVector& WorldLocation) const;
+
+	UFUNCTION(BlueprintCallable, Category = "Agrarian|Map Boundary")
+	FVector ClampLocationToBoundary(const FVector& WorldLocation) const;
+
+protected:
+	void EnforceBoundaryForCharacter(AAgrarianGameCharacter* Character) const;
+};