1  // SPDX-FileCopyrightText: 2019 Anne Barela for Adafruit Industries
 2  //
 3  // SPDX-License-Identifier: MIT
 4  
 5  #include "Arduino.h"
 6  
 7  // display size information
 8  #define X_MIN  0
 9  #define X_MAX  7
10  #define Y_MIN  0
11  #define Y_MAX 15
12  #define WIDTH  8
13  #define HEIGHT 16
14  
15  class Tetris{
16    private:
17      // Stores the dead blocks with 1 representing a dead block, and 0 a blank grid 
18      uint8_t deadTetrisBoard[16];
19      // deadTetrisBoard and the currentPiece is merged to form activeTetrisBoard, 
20      uint8_t activeTetrisBoard[16];
21      // Piece variables
22      uint8_t* currentPiece;
23      int8_t currentPieceX;  // tracks the X coordinate of the (currentPiece[0]>>7) 
24      int8_t currentPieceY;  // tracks the Y coordinate of the (currentPiece[0]>>7)
25      // Game variables
26      bool moveDisabled;
27      uint8_t totalLinesCleared;
28      uint16_t timeInterval;
29      unsigned long lastMoveTime;
30      unsigned long lastLandedTime;
31      
32      void generatePiece();  // randomly generate a piece from piecesGenerated
33      bool checkIfLanded();
34      bool clearLines();  // returns false if no line is cleared
35      void flashClearedLines(uint8_t* temp);
36      void convertActiveToDead();
37      // merges the deadTetrisBoard and the currentPiece to form the activeTetrisBoard
38      // unsuccessful merge = currentPiece out of bounds or collision between currentPiece and deadTetrisBoard
39      bool mergeTetrisBoard();
40      void gameOver();  
41  
42    public:
43      bool gameRunning; 
44      void init();
45      void run();
46      void movePiece(int8_t dx, int8_t dy);
47      void rotatePiece();  
48      void dropPiece();
49      uint8_t* getActiveBoard();
50  };