javaでテトリミノを回転させるソースコード教えてください(＞人＜;)

Question

###前提・実現したいこと

javaのCUIでテトリスを作ろうとしています
テトリスといってもCUIなのでゲーム設計は簡単にしています

大体は出来上がってきたのですが、「テトリミノを回転させる」
プログラムがどうしても書けません
どういう動きをすればいいのか全く思いつきません

プログラムとしては
「wを押すとテトリミノを左に９０度回転させる」プログラムです

もしよかったら回転させるプログラムを書いてもらいたいです＞＜
ちなみにテトリミノは２次元配列で「”■”」または「”●”」表現しています

本当に困っています＞＜ みなさんの力を貸してください！

###該当のソースコード
Java```ここに言語を入力
ここにご自身が実行したソースコードを書いてください

	System.out.println("  T E T R I S");	
   String [][] field = {{"□","□","□","□","■","□","□","□","□","□"},					                                            //ゲーム画面
						{"□","□","□","□","■","□","□","□","□","□"},
						{"□","□","□","□","■","□","□","□","□","□"},
						{"□","□","□","□","■","□","□","□","□","□"},
						{"□","□","□","□","□","□","□","□","□","□"},
						{"□","□","□","□","□","□","□","□","□","□"},
						{"□","□","□","□","□","□","□","□","□","□"},
						{"□","□","□","□","□","□","□","□","□","□"},
						{"□","□","□","□","□","□","□","□","□","□"},
						{"□","□","□","□","□","□","□","□","□","□"},
						{"□","□","□","□","□","□","□","□","□","□"},
						{"□","□","□","□","□","□","□","□","□","□"},
						{"□","□","□","□","□","□","□","□","□","□"},
						{"□","□","□","□","□","□","□","□","□","□"},
						{"□","□","□","□","□","□","□","□","□","□"},
						{"□","□","□","□","□","□","□","□","□","□"},
						{"□","□","□","□","□","□","□","□","□","□"},
						{"□","□","□","□","□","□","□","□","□","□"},
						{"□","□","□","□","□","□","□","□","□","□"},
						{"□","□","□","□","□","□","□","□","□","□"}};

Answer 1

ゲームプログラム経験が有るので
アドバイスをさせて頂きます。

テトリミノを回転させるプログラムを教えてくださいとのことですが。

だいたいのコードは完成しているとのことですので
何かしらエラーが出てわからない状態と想定させて頂きました。

その場合まずは回転させずに普通にそのまま下に落ちるプログラムを完成させます。

次にそのプログラムとは別に回転させるプログラムを書きます。
ボタンを押すと座標を調べてから回転させるだけですが
少しだけ簡単に説明しますね

以下詳細

ゲームキャラ
■
●

例えば上のキャラを回転させる時って
●の位置をキャラクター位置座標として回転させます。
テトリスの場合も同じ

●■ クルッ こんな風に

おわかり頂けましたね？
つまり現在位置を設定して
障害物が無く回転可能なら現在位置はそのままで
描画等を変更すれば解決できるはずです。

テトリスでしたらプログラムがゴロゴロ転がってるはずですので
がんばってプログラムしてみてください。

---

■描画の基本■

ゲームの描画の基本について説明が足りてなかったので
させて頂きます。小話だと思って軽く聞いてください。

ゲームキャラは基本的にどんな物でも”現在位置座標”を持っています
それとは別に大きいキャラなどは描画情報も重要です

現在位置●
それ以外の描画■

■ ■ ■
■ ■ ■
● ■ ■

こんな風になってる訳ですね
現在位置を動かすだけで

三　　■ ■ ■
三　　■ ■ ■
三　　● ■ ■

動きます（当たり前ですが）
結論を言えば
現在位置とは別に描画設定が存在しているので
ボタンを押すと描画設定が変更されるという考え方が一番合理的で
まあだいたいのゲームはそんな感じだと思いますよ。

そして描画設定ってどんな感じ？と聞かれれば
●の現在位置に対してｘ座標に何タイル分ｙ座標に何タイル分描画すると言う事でしょう

座標（０，１）
座標（０，０）

■
●

座標（０，０）
座標（１，０）

●■

あとは回転のプログラムを考えるだけですが
それこそネットに転がってるので説明は省略します。

Comments

[zyanpoyo]

ご丁寧な回答ありがとうございます！
二次元配列に格納した文字の座標を取得することも可能ですか？？
Pointクラスを使うんでしょうか？？
すいません、プログラミングが全然わからなくてこんな質問してしまって

Answer 2

えぇ…まったく思いつかないのであれば、まだテトリスを作れる域に達していないという事です。
学校の課題ですか？

まず、４ｘ４位の配列を回転させることを考えましょう。90度と限定されているのであれば、
三角関数を使用しなくても回転できると思いますが。（本当はまじめに計算したほうが良い）

配列を読み、4ｘ4と決まっているのだから、どう書き込めば、90度回転した結果になりますか？

Comments

[zyanpoyo]

回答ありがとうございますm(_)m
テトリミノの中心を決めて、そこを中心に回転させればいいのでしょか、、、

[mugicya]

そうですね。中心は決めなければいけません。

Answer 3

まともにやるなら、デバッグしながら意図した表示になるように何回もやる。
砂の城でいいなら、w押したら出来上がりのイメージの配列をそのまま表示（課題ならいいんじゃない）

String [][] field = 
[
["□","□","□","□","□","□","□","□","□","□"],
["□","□","□","□","□","□","□","□","□","□"],
["□","□","□","□","□","□","□","□","□","□"],
["□","■","■","■","■","□","□","□","□","□"],
["□","□","□","□","□","□","□","□","□","□"],
["□","□","□","□","□","□","□","□","□","□"],
["□","□","□","□","□","□","□","□","□","□"],
["□","□","□","□","□","□","□","□","□","□"],
["□","□","□","□","□","□","□","□","□","□"],
["□","□","□","□","□","□","□","□","□","□"],
["□","□","□","□","□","□","□","□","□","□"],
["□","□","□","□","□","□","□","□","□","□"],
["□","□","□","□","□","□","□","□","□","□"],
["□","□","□","□","□","□","□","□","□","□"],
["□","□","□","□","□","□","□","□","□","□"],
["□","□","□","□","□","□","□","□","□","□"],
["□","□","□","□","□","□","□","□","□","□"],
["□","□","□","□","□","□","□","□","□","□"],
["□","□","□","□","□","□","□","□","□","□"],
["□","□","□","□","□","□","□","□","□","□"]
];

Answer 4

１ブロックにつき4通りのみなので、手入力で定義するというのも一考ですよ。

Comments

[zyanpoyo]

分かりました！　考えてみます！
回答ありがとうございますm(_)m

Answer 5

web 上でプログラムをさがし、それを参考にしてみては？

検索例：

• Tetris/Java https://rosettacode.org/wiki/Tetris/Java

に java で書いたテトリスがあります。

この中での テトリミノの定義と回転の設定は次のようになっています。
定義

 IShape(new int[][]{{0, -1}, {0, 0}, {0, 1}, {0, 2}})

回転

    void rotate(Shape s) {
        if (s == Shape.Square)
            return;
 
        for (int[] row : s.pos) {
            int tmp = row[0];
            row[0] = row[1];
            row[1] = -tmp;
        }
    }

Comments

[zyanpoyo]

回答ありがとうございます！　参考にさせていただきます(TдT)