From 120c3a90e1f531c8704e9f55755caf894309ae5c Mon Sep 17 00:00:00 2001
From: foglar <kohout.fi.2023@skola.ssps.cz>
Date: Wed, 13 Nov 2024 17:01:28 +0100
Subject: [PATCH] Rotation check

---
 Program.cs | 48 ++++++++++++++++++++++++++++++++----------------
 README.md  |  4 ++--
 2 files changed, 34 insertions(+), 18 deletions(-)

diff --git a/Program.cs b/Program.cs
index a6b6271..9bd646f 100755
--- a/Program.cs
+++ b/Program.cs
@@ -66,8 +66,7 @@ namespace Tetris
     }
   }
 
-  public class Speed
-  ()
+  public class Speed()
   {
     private static int speed = 400;
 
@@ -87,6 +86,7 @@ namespace Tetris
 
     private int x, y;
     private Matrix matrix;
+
     public Shape(Matrix matrix)
     {
       Random random = new Random();
@@ -96,7 +96,6 @@ namespace Tetris
       current_shape = shape[randomRotation];
       this.matrix = matrix;
       matrix.IncreaseScore(10);
-      // TODO: Implement random color
       this.x = 0; // Starting position
       this.y = 8; // Center of the grid
     }
@@ -145,19 +144,39 @@ namespace Tetris
 
     public void Rotate()
     {
-      Clear();
-      randomRotation = (randomRotation + 1) % shape.Count;
-      // !IMPORTANT: Check if rotation is possible
-      current_shape = shape[randomRotation];
-      Draw();
+      int nextRotation = (randomRotation + 1) % shape.Count;
+      int[,] nextShape = shape[nextRotation];
+
+      if (CanRotate(nextShape))
+      {
+        Clear();
+        current_shape = nextShape;
+        randomRotation = nextRotation;
+        Draw();
+      }
+    }
+
+    private bool CanRotate(int[,] newShape)
+    {
+      for (int i = 0; i < newShape.GetLength(0); i++)
+      {
+        int newX = x + newShape[i, 0];
+        int newY = y + newShape[i, 1];
+
+        if (newX >= Matrix.HEIGHT || newX < 0 || newY < 0 || newY >= Matrix.WIDTH ||
+            (matrix.GetBlock(newX, newY) != ' ' && !IsPartOfShape(newX, newY)))
+        {
+          return false;
+        }
+      }
+      return true;
     }
 
     private bool IsPartOfShape(int matrixX, int matrixY)
     {
       for (int i = 0; i < current_shape.GetLength(0); i++)
       {
-        if (x + current_shape[i, 0] == matrixX &&
-            y + current_shape[i, 1] == matrixY)
+        if (x + current_shape[i, 0] == matrixX && y + current_shape[i, 1] == matrixY)
         {
           return true;
         }
@@ -173,12 +192,8 @@ namespace Tetris
         int newBlockY = newY + current_shape[i, 1];
 
         if (newBlockX >= Matrix.HEIGHT || newBlockX < 0 || newBlockY < 0 ||
-            newBlockY >= Matrix.WIDTH)
-        {
-          return false;
-        }
-        if (matrix.GetBlock(newBlockX, newBlockY) != ' ' &&
-            !IsPartOfShape(newBlockX, newBlockY))
+            newBlockY >= Matrix.WIDTH ||
+            (matrix.GetBlock(newBlockX, newBlockY) != ' ' && !IsPartOfShape(newBlockX, newBlockY)))
         {
           return false;
         }
@@ -195,6 +210,7 @@ namespace Tetris
     }
   }
 
+
   public class Matrix
   {
     public const int HEIGHT = 22;
diff --git a/README.md b/README.md
index a6e490c..ea93bde 100755
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@
 ```bash
 git clone https://github.com/foglar/Tetris.git
 cd Tetris
-dotnet run ./
+dotnet run
 ```
 
 > [!NOTE]
@@ -17,4 +17,4 @@ dotnet run ./
 ## Simple tetris game
 
 - [SRS](./TetrominoSRS.md)
-- [FS](./TetrominoFS.md) - Not ready yet
+- [FS](./TetrominoFS.md)