Add GridManager to spawn grid cells

Source/Tactica/Private/GridManager.cpp

@@ -0,0 +1,66 @@
+#include "GridManager.h"
+#include "GridCell.h"
+#include "Engine/World.h"
+
+// このファイル専用のログカテゴリ
+DEFINE_LOG_CATEGORY_STATIC(LogTacticaGrid, Log, All);
+
+AGridManager::AGridManager()
+{
+	PrimaryActorTick.bCanEverTick = false;
+}
+
+void AGridManager::BeginPlay()
+{
+	Super::BeginPlay();
+
+	UE_LOG(LogTacticaGrid, Log, TEXT("GridManager BeginPlay: %d x %d, CellSize=%.1f"),
+		GridSizeX, GridSizeY, CellSize);
+
+	GenerateGrid();
+}
+
+void AGridManager::GenerateGrid()
+{
+	UWorld* World = GetWorld();
+	if (!World)
+	{
+		UE_LOG(LogTacticaGrid, Error, TEXT("GetWorld() が null です"));
+		return;
+	}
+
+	if (!CellClass)
+	{
+		CellClass = AGridCell::StaticClass();
+	}
+
+	Cells.Reset();
+	const FVector Origin = GetActorLocation();
+
+	for (int32 Y = 0; Y < GridSizeY; ++Y)
+	{
+		for (int32 X = 0; X < GridSizeX; ++X)
+		{
+			const FVector Location = Origin + FVector(X * CellSize, Y * CellSize, 0.0f);
+
+			FActorSpawnParameters Params;
+			Params.SpawnCollisionHandlingOverride =
+				ESpawnActorCollisionHandlingMethod::AlwaysSpawn;
+
+			AGridCell* Cell = World->SpawnActor<AGridCell>(
+				CellClass, Location, FRotator::ZeroRotator, Params);
+
+			if (Cell)
+			{
+				Cell->GridCoord = FIntPoint(X, Y);
+				Cells.Add(Cell);
+			}
+			else
+			{
+				UE_LOG(LogTacticaGrid, Warning, TEXT("マス (%d, %d) の生成に失敗"), X, Y);
+			}
+		}
+	}
+
+	UE_LOG(LogTacticaGrid, Log, TEXT("%d 個のマスを生成しました"), Cells.Num());
+}

Source/Tactica/Public/GridManager.h

@@ -0,0 +1,43 @@
+#pragma once
+
+#include "CoreMinimal.h"
+#include "GameFramework/Actor.h"
+#include "GridManager.generated.h"
+
+class AGridCell;
+
+UCLASS()
+class TACTICA_API AGridManager : public AActor
+{
+	GENERATED_BODY()
+
+public:
+	AGridManager();
+
+protected:
+	virtual void BeginPlay() override;
+
+public:
+	// グリッドの横のマス数
+	UPROPERTY(EditAnywhere, Category = "Grid")
+	int32 GridSizeX = 3;
+
+	// グリッドの縦のマス数
+	UPROPERTY(EditAnywhere, Category = "Grid")
+	int32 GridSizeY = 3;
+
+	// 1マスの大きさ(cm)
+	UPROPERTY(EditAnywhere, Category = "Grid")
+	float CellSize = 100.0f;
+
+	// スポーンするマスのクラス(未設定ならAGridCell)
+	UPROPERTY(EditAnywhere, Category = "Grid")
+	TSubclassOf<AGridCell> CellClass;
+
+	// 生成したマスの一覧
+	UPROPERTY(VisibleAnywhere, Category = "Grid")
+	TArray<TObjectPtr<AGridCell>> Cells;
+
+private:
+	void GenerateGrid();
+};