回答編集履歴

コードを旧バージョン向けに変更

2020/01/05 00:58

投稿

Bongo

スコア10811

test CHANGED Viewed

@@ -26,7 +26,7 @@
 /// <summary>
-///		お絵描き
+///        お絵描き
 /// </summary>
@@ -36,463 +36,477 @@
 {
-	// ペンの半径...0で1ピクセルの線になる
-	[Range(0, 5)] public int penRadius;
-	// 前景色
-	public Color foregroundColor = Color.red;
-	// 背景色
-	[SerializeField] private Color backgroundColor = Color.white;
-	private RectTransform rectTransform;
-	private Image image;
-	private Texture2D texture;
-	private Vector2Int textureSize;
-	private Vector2Int previousPixelPosition;
-	private Vector2Int cachedPixelPosition;
-	// Undo、Redo用のテクスチャ格納庫
-	private readonly Stack<Texture2D> undoStack = new Stack<Texture2D>();
-	private readonly Stack<Texture2D> redoStack = new Stack<Texture2D>();
-	// Undo、Redo可能かどうかを外部スクリプトから調べたい場合、これらプロパティを参照する
-	public bool CanUndo => this.undoStack.Count > 0;
-	public bool CanRedo => this.redoStack.Count > 0;
-	// Undo時にはundoStackからテクスチャを1つ取り出して現在のテクスチャとし、
-	// 古いテクスチャはredoStackに積んでおく
-	public void Undo()
-	{
-		if (!this.CanUndo)
-		{
-			return;
-		}
-		var previousTexture = this.texture;
-		var poppedTexture = this.undoStack.Pop();
-		this.texture = poppedTexture;
-		this.redoStack.Push(previousTexture);
-		this.UpdateSprite();
-		Debug.Log($"Undo! UndoStack : {this.undoStack.Count} RedoStack : {this.redoStack.Count}");
-	}
-	// Redo時にはredoStackからテクスチャを1つ取り出して現在のテクスチャとし、
-	// 古いテクスチャはundoStackに積んでおく
-	public void Redo()
-	{
-		if (!this.CanRedo)
-		{
-			return;
-		}
-		var previousTexture = this.texture;
-		var poppedTexture = this.redoStack.Pop();
-		this.texture = poppedTexture;
-		this.undoStack.Push(previousTexture);
-		this.UpdateSprite();
-		Debug.Log($"Redo! UndoStack : {this.undoStack.Count} RedoStack : {this.redoStack.Count}");
-	}
-	// テクスチャに何かしらの操作（線を引くなど）を行う前にはRecordを実行することにする
-	// これによって変更前のテクスチャが複製されundoStackに積まれる
-	// また、このタイミングでredoStackは空にする
-	private void Record()
-	{
-		this.undoStack.Push(Instantiate(this.texture));
-		foreach (var textureInRedoStack in this.redoStack)
-		{
-			Destroy(textureInRedoStack);
-		}
-		this.redoStack.Clear();
-		Debug.Log($"Record! UndoStack : {this.undoStack.Count} RedoStack : {this.redoStack.Count}");
-	}
-	private void UpdateSprite()
-	{
-		var previousSprite = this.image.sprite;
-		this.image.sprite = Sprite.Create(
-			this.texture,
-			new Rect(0, 0, this.texture.width, this.texture.height),
-			Vector2.zero);
-		Destroy(previousSprite);
-	}
-	private Vector2Int GetPixelPosition()
-	{
-		if (!RectTransformUtility.ScreenPointToLocalPointInRectangle(
-			this.rectTransform,
-			Input.mousePosition,
-			null,
-			out var pixelPositionFloat))
-		{
-			return this.cachedPixelPosition;
-		}
-		var sizeDelta = this.rectTransform.sizeDelta;
-		pixelPositionFloat += sizeDelta * this.rectTransform.pivot;
-		var pixelPosition = new Vector2Int(
-			Mathf.Clamp((int)pixelPositionFloat.x, 0, this.textureSize.x - 1),
-			Mathf.Clamp((int)pixelPositionFloat.y, 0, this.textureSize.y - 1));
-		Debug.Log($"Pixel Position: {pixelPosition}");
-		this.cachedPixelPosition = pixelPosition;
-		return this.cachedPixelPosition;
-	}
-	// 入力座標がテクスチャ範囲内ならtrue、さもなければfalse
-	private bool PositionIsWithinTexture(Vector2Int position)
-	{
-		return (position.x >= 0) && (position.y >= 0) &&
-			   (position.x < this.textureSize.x) && (position.y < this.textureSize.y);
-	}
-	// 入力座標に円を描く
-	private void PaintAt(Vector2Int position, Color32 color, int radius)
-	{
-		var sqrRadius = radius * radius;
-		for (var i = -radius; i <= radius; i++)
-		{
-			for (var j = -radius; j <= radius; j++)
-			{
-				var p = new Vector2Int(position.x + i, position.y + j);
-				var dot = (i * i) + (j * j);
-				if ((dot <= sqrRadius) && this.PositionIsWithinTexture(p))
-				{
-					this.texture.SetPixel(p.x, p.y, color);
-				}
-			}
-		}
-		this.texture.Apply();
-	}
-	private void LineTo(Vector2Int from, Vector2Int to, Color32 color, int radius)
-	{
-		var penPosition = from;
-		var x = (float)penPosition.x;
-		var y = (float)penPosition.y;
-		var fromTo = to - from;
-		var fromToSign = new Vector2Int((int)Mathf.Sign(fromTo.x), (int)Mathf.Sign(fromTo.y));
-		var fromToXIsZero = fromToSign.x == 0;
-		var fromToYIsZero = fromToSign.y == 0;
-		fromToSign.x = fromToXIsZero ? 1 : fromToSign.x;
-		fromToSign.y = fromToYIsZero ? 1 : fromToSign.y;
-		var absFromTo = fromToSign * fromTo;
-		var dominantDirection = 0;
-		var delta = Vector2.zero;
-		if (absFromTo.x >= absFromTo.y)
-		{
-			var tangent = fromToXIsZero ? 0 : (float)fromTo.y / fromTo.x;
-			delta.x = fromToSign.x;
-			delta.y = tangent * delta.x;
-		}
-		else
-		{
-			var tangent = fromToYIsZero ? 0 : (float)fromTo.x / fromTo.y;
-			delta.y = fromToSign.y;
-			delta.x = tangent * delta.y;
-			dominantDirection = 1;
-		}
-		while (this.PositionIsWithinTexture(penPosition))
-		{
-			try
-			{
-				this.PaintAt(penPosition, color, radius);
-				x += delta.x;
-				y += delta.y;
-				penPosition.x = (int)x;
-				penPosition.y = (int)y;
-				if (fromToSign[dominantDirection] > 0)
-				{
-					if (penPosition[dominantDirection] >= to[dominantDirection])
-					{
-						break;
-					}
-				}
-				else
-				{
-					if (penPosition[dominantDirection] <= to[dominantDirection])
-					{
-						break;
-					}
-				}
-			}
-			catch (Exception e)
-			{
-				Debug.LogException(e);
-				break;
-			}
-		}
-	}
-	private void Start()
-	{
-		this.rectTransform = this.transform as RectTransform;
-		this.image = this.GetComponent<Image>();
-		var sizeDelta = this.rectTransform.sizeDelta;
-		var width = (int)sizeDelta.x;
-		var height = (int)sizeDelta.y;
-		this.texture = new Texture2D(width, height, TextureFormat.ARGB32, false) {filterMode = FilterMode.Bilinear};
-		this.texture.SetPixels32(Enumerable.Repeat<Color32>(this.backgroundColor, width * height).ToArray());
-		this.texture.Apply();
-		this.textureSize = new Vector2Int(width, height);
-		this.UpdateSprite();
-	}
-	private void Update()
-	{
-		if (Input.GetKeyDown(KeyCode.U))
-		{
-			this.Undo();
-		}
-		if (Input.GetKeyDown(KeyCode.R))
-		{
-			this.Redo();
-		}
-		if (Input.GetMouseButtonDown(0))
-		{
-			this.Record();
-			this.previousPixelPosition = this.GetPixelPosition();
-		}
-		else if (Input.GetMouseButton(0))
-		{
-			var currentPixelPosition = this.GetPixelPosition();
-			this.LineTo(this.previousPixelPosition, currentPixelPosition, this.foregroundColor, this.penRadius);
-			this.previousPixelPosition = currentPixelPosition;
-		}
-	}
+    // ペンの半径...0で1ピクセルの線になる
+    [Range(0, 5)] public int penRadius;
+    // 前景色
+    public Color foregroundColor = Color.red;
+    // 背景色
+    [SerializeField] private Color backgroundColor = Color.white;
+    private RectTransform rectTransform;
+    private Image image;
+    private Texture2D texture;
+    private Vector2Int textureSize;
+    private Vector2Int previousPixelPosition;
+    private Vector2Int cachedPixelPosition;
+    // Undo、Redo用のテクスチャ格納庫
+    private readonly Stack<Texture2D> undoStack = new Stack<Texture2D>();
+    private readonly Stack<Texture2D> redoStack = new Stack<Texture2D>();
+    // Undo、Redo可能かどうかを外部スクリプトから調べたい場合、これらプロパティを参照する
+    public bool CanUndo
+    {
+        get { return this.undoStack.Count > 0; }
+    }
+    public bool CanRedo
+    {
+        get { return this.redoStack.Count > 0; }
+    }
+    // Undo時にはundoStackからテクスチャを1つ取り出して現在のテクスチャとし、
+    // 古いテクスチャはredoStackに積んでおく
+    public void Undo()
+    {
+        if (!this.CanUndo)
+        {
+            return;
+        }
+        var previousTexture = this.texture;
+        var poppedTexture = this.undoStack.Pop();
+        this.texture = poppedTexture;
+        this.redoStack.Push(previousTexture);
+        this.UpdateSprite();
+        Debug.LogFormat("Undo! UndoStack : {0} RedoStack : {1}", this.undoStack.Count, this.redoStack.Count);
+    }
+    // Redo時にはredoStackからテクスチャを1つ取り出して現在のテクスチャとし、
+    // 古いテクスチャはundoStackに積んでおく
+    public void Redo()
+    {
+        if (!this.CanRedo)
+        {
+            return;
+        }
+        var previousTexture = this.texture;
+        var poppedTexture = this.redoStack.Pop();
+        this.texture = poppedTexture;
+        this.undoStack.Push(previousTexture);
+        this.UpdateSprite();
+        Debug.LogFormat("Redo! UndoStack : {0} RedoStack : {1}", this.undoStack.Count, this.redoStack.Count);
+    }
+    // テクスチャに何かしらの操作（線を引くなど）を行う前にはRecordを実行することにする
+    // これによって変更前のテクスチャが複製されundoStackに積まれる
+    // また、このタイミングでredoStackは空にする
+    private void Record()
+    {
+        this.undoStack.Push(Instantiate(this.texture));
+        foreach (var textureInRedoStack in this.redoStack)
+        {
+            Destroy(textureInRedoStack);
+        }
+        this.redoStack.Clear();
+        Debug.LogFormat("Record! UndoStack : {0} RedoStack : {1}", this.undoStack.Count, this.redoStack.Count);
+    }
+    private void UpdateSprite()
+    {
+        var previousSprite = this.image.sprite;
+        this.image.sprite = Sprite.Create(
+            this.texture,
+            new Rect(0, 0, this.texture.width, this.texture.height),
+            Vector2.zero);
+        Destroy(previousSprite);
+    }
+    private Vector2Int GetPixelPosition()
+    {
+        if (!RectTransformUtility.ScreenPointToLocalPointInRectangle(
+            this.rectTransform,
+            Input.mousePosition,
+            null,
+            out var pixelPositionFloat))
+        {
+            return this.cachedPixelPosition;
+        }
+        var sizeDelta = this.rectTransform.sizeDelta;
+        pixelPositionFloat += sizeDelta * this.rectTransform.pivot;
+        var pixelPosition = new Vector2Int(
+            Mathf.Clamp((int)pixelPositionFloat.x, 0, this.textureSize.x - 1),
+            Mathf.Clamp((int)pixelPositionFloat.y, 0, this.textureSize.y - 1));
+        Debug.LogFormat("Pixel Position: {0}", pixelPosition);
+        this.cachedPixelPosition = pixelPosition;
+        return this.cachedPixelPosition;
+    }
+    // 入力座標がテクスチャ範囲内ならtrue、さもなければfalse
+    private bool PositionIsWithinTexture(Vector2Int position)
+    {
+        return (position.x >= 0) && (position.y >= 0) &&
+               (position.x < this.textureSize.x) && (position.y < this.textureSize.y);
+    }
+    // 入力座標に円を描く
+    private void PaintAt(Vector2Int position, Color32 color, int radius)
+    {
+        var sqrRadius = radius * radius;
+        for (var i = -radius; i <= radius; i++)
+        {
+            for (var j = -radius; j <= radius; j++)
+            {
+                var p = new Vector2Int(position.x + i, position.y + j);
+                var dot = (i * i) + (j * j);
+                if ((dot <= sqrRadius) && this.PositionIsWithinTexture(p))
+                {
+                    this.texture.SetPixel(p.x, p.y, color);
+                }
+            }
+        }
+        this.texture.Apply();
+    }
+    private void LineTo(Vector2Int from, Vector2Int to, Color32 color, int radius)
+    {
+        var penPosition = from;
+        var x = (float)penPosition.x;
+        var y = (float)penPosition.y;
+        var fromTo = to - from;
+        var fromToSign = new Vector2Int((int)Mathf.Sign(fromTo.x), (int)Mathf.Sign(fromTo.y));
+        var fromToXIsZero = fromToSign.x == 0;
+        var fromToYIsZero = fromToSign.y == 0;
+        fromToSign.x = fromToXIsZero ? 1 : fromToSign.x;
+        fromToSign.y = fromToYIsZero ? 1 : fromToSign.y;
+        var absFromTo = fromToSign * fromTo;
+        var dominantDirection = 0;
+        var delta = Vector2.zero;
+        if (absFromTo.x >= absFromTo.y)
+        {
+            var tangent = fromToXIsZero ? 0 : (float)fromTo.y / fromTo.x;
+            delta.x = fromToSign.x;
+            delta.y = tangent * delta.x;
+        }
+        else
+        {
+            var tangent = fromToYIsZero ? 0 : (float)fromTo.x / fromTo.y;
+            delta.y = fromToSign.y;
+            delta.x = tangent * delta.y;
+            dominantDirection = 1;
+        }
+        while (this.PositionIsWithinTexture(penPosition))
+        {
+            try
+            {
+                this.PaintAt(penPosition, color, radius);
+                x += delta.x;
+                y += delta.y;
+                penPosition.x = (int)x;
+                penPosition.y = (int)y;
+                if (fromToSign[dominantDirection] > 0)
+                {
+                    if (penPosition[dominantDirection] >= to[dominantDirection])
+                    {
+                        break;
+                    }
+                }
+                else
+                {
+                    if (penPosition[dominantDirection] <= to[dominantDirection])
+                    {
+                        break;
+                    }
+                }
+            }
+            catch (Exception e)
+            {
+                Debug.LogException(e);
+                break;
+            }
+        }
+    }
+    private void Start()
+    {
+        this.rectTransform = this.transform as RectTransform;
+        this.image = this.GetComponent<Image>();
+        var sizeDelta = this.rectTransform.sizeDelta;
+        var width = (int)sizeDelta.x;
+        var height = (int)sizeDelta.y;
+        this.texture = new Texture2D(width, height, TextureFormat.ARGB32, false) {filterMode = FilterMode.Bilinear};
+        this.texture.SetPixels32(Enumerable.Repeat<Color32>(this.backgroundColor, width * height).ToArray());
+        this.texture.Apply();
+        this.textureSize = new Vector2Int(width, height);
+        this.UpdateSprite();
+    }
+    private void Update()
+    {
+        if (Input.GetKeyDown(KeyCode.U))
+        {
+            this.Undo();
+        }
+        if (Input.GetKeyDown(KeyCode.R))
+        {
+            this.Redo();
+        }
+        if (Input.GetMouseButtonDown(0))
+        {
+            this.Record();
+            this.previousPixelPosition = this.GetPixelPosition();
+        }
+        else if (Input.GetMouseButton(0))
+        {
+            var currentPixelPosition = this.GetPixelPosition();
+            this.LineTo(this.previousPixelPosition, currentPixelPosition, this.foregroundColor, this.penRadius);
+            this.previousPixelPosition = currentPixelPosition;
+        }
+    }
 }