/// <summary>
/// 迷路の開始地点を決める
/// </summary>
/// <remarks>
/// 開始地点は外周以外の偶数を選択
/// </remarks>
private void GetFirstPoint()
{
StartPoint = new MapPoint(GetRandomEvenPoint(2, SizeX - 3),
GetRandomEvenPoint(2, SizeY - 3));
DungeonMap[StartPoint.X, StartPoint.Y] = LoadStatus.Load;
LoadEvenPoint.Add(StartPoint);
}
/// <summary>
/// 再帰呼び出しで道を作る
/// </summary>
/// <param name="startPointIndex">掘削の起点ポイント</param>
public void RecursiveLoad(MapPoint startPointIndex)
{
//掘る方向を決める
LoadDirection dir = GetDirection(startPointIndex);
//掘る2マス先のポイントと中間地点を格納する変数
MapPoint target, subTarget;
//2マス先と中間マスを取得する
switch (dir)
{
case LoadDirection.Top:
target = new MapPoint(startPointIndex.X, startPointIndex.Y - 2);
subTarget = new MapPoint(startPointIndex.X, startPointIndex.Y - 1);
break;
case LoadDirection.Bottom:
target = new MapPoint(startPointIndex.X, startPointIndex.Y + 2);
subTarget = new MapPoint(startPointIndex.X, startPointIndex.Y + 1);
break;
case LoadDirection.Left:
target = new MapPoint(startPointIndex.X - 2, startPointIndex.Y);
subTarget = new MapPoint(startPointIndex.X - 1, startPointIndex.Y);
break;
case LoadDirection.Right:
target = new MapPoint(startPointIndex.X + 2, startPointIndex.Y);
subTarget = new MapPoint(startPointIndex.X + 1, startPointIndex.Y);
break;
default:
//もう掘れない場合は自分を掘削リストから削除して
//既存のポイントから掘削を再開する
//最初の一回目をゴールとする
if (isGoalSet == false)
{
isGoalSet = true;
GoalPoint = new MapPoint(startPointIndex.X, startPointIndex.Y);
}
LoadEvenPoint.Remove(startPointIndex);
if (LoadEvenPoint.Count > 0)
{
RecursiveLoad(LoadEvenPoint[rnd.Next(LoadEvenPoint.Count)]);
}
//掘削ポイントがもうない場合は終了する
return;
}
//掘る先を掘削リストに追加
LoadEvenPoint.Add(target);
//対象と中間を掘る
DungeonMap[target.X, target.Y] = LoadStatus.Load;
DungeonMap[subTarget.X, subTarget.Y] = LoadStatus.Load;
//堀った先を中心に再帰
RecursiveLoad(target);
}
