Diff: Tetris/Board.cpp

Revision:

18:cf74968078ea

Parent:

15:e9f3b72b7486

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Tetris/Board.cpp	Thu Dec 01 01:46:22 2022 +0000
@@ -0,0 +1,208 @@
+#include "Board.h"
+
+/*
+==================
+Init
+==================
+*/
+Board::Board (Pieces *pPieces, int pScreenHeight)
+{
+    // Get the screen height
+    mScreenHeight = pScreenHeight;
+
+    // Get the pointer to the pieces class
+    mPieces = pPieces;
+
+    //Init the board blocks with free positions
+    InitBoard();
+}
+
+/*
+======================================                                  
+Init the board blocks with free positions
+====================================== 
+*/
+void Board::InitBoard()
+{
+    for (int i = 0; i < BOARD_WIDTH; i++)
+        for (int j = 0; j < BOARD_HEIGHT; j++)
+            mBoard[i][j] = POS_FREE;
+}
+
+/* 
+======================================                                  
+Store a piece in the board by filling the blocks
+
+Parameters:
+
+>> pX:      Horizontal position in blocks
+>> pY:      Vertical position in blocks
+>> pPiece:  Piece to draw
+>> pRotation:   1 of the 4 possible rotations
+====================================== 
+*/
+void Board::StorePiece (int pX, int pY, int pPiece, int pRotation)
+{
+    // Store each block of the piece into the board
+    for (int i1 = pX, i2 = 0; i1 < pX + PIECE_BLOCKS; i1++, i2++)
+    {
+        for (int j1 = pY, j2 = 0; j1 < pY + PIECE_BLOCKS; j1++, j2++)
+        {   
+            // Store only the blocks of the piece that are not holes
+            if (mPieces->GetBlockType (pPiece, pRotation, j2, i2) != 0)     
+                mBoard[i1][j1] = POS_FILLED;    
+        }
+    }
+}
+
+/* 
+======================================                                  
+Check if the game is over becase a piece have achived the upper position
+
+Returns true or false
+====================================== 
+*/
+bool Board::IsGameOver()
+{
+    //If the first line has blocks, then, game over
+    for (int i = 0; i < BOARD_WIDTH; i++)
+    {
+        if (mBoard[i][0] == POS_FILLED) return true;
+    }
+
+    return false;
+}
+
+/* 
+======================================                                  
+Delete a line of the board by moving all above lines down
+
+Parameters:
+
+>> pY:      Vertical position in blocks of the line to delete
+====================================== 
+*/
+void Board::DeleteLine (int pY)
+{
+    // Moves all the upper lines one row down
+    for (int j = pY; j > 0; j--)
+    {
+        for (int i = 0; i < BOARD_WIDTH; i++)
+        {
+            mBoard[i][j] = mBoard[i][j-1];
+        }
+    }   
+}
+
+/* 
+======================================                                  
+Delete all the lines that should be removed
+====================================== 
+*/
+int Board::DeletePossibleLines ()
+{
+    int count =0;
+    for (int j = 0; j < BOARD_HEIGHT; j++)
+    {
+        int i = 0;
+        while (i < BOARD_WIDTH)
+        {
+            if (mBoard[i][j] != POS_FILLED) break;
+            i++;
+        }
+
+        if (i == BOARD_WIDTH) 
+        {
+            DeleteLine (j);
+            count++;
+        }
+    }
+    return count;
+}
+
+/* 
+======================================                                  
+Returns 1 (true) if the this block of the board is empty, 0 if it is filled
+
+Parameters:
+
+>> pX:      Horizontal position in blocks
+>> pY:      Vertical position in blocks
+====================================== 
+*/
+bool Board::IsFreeBlock (int pX, int pY)
+{
+    if (mBoard [pX][pY] == POS_FREE) return true; else return false;
+}
+
+/* 
+======================================                                  
+Returns the horizontal position (isn pixels) of the block given like parameter
+
+Parameters:
+
+>> pPos:    Horizontal position of the block in the board
+====================================== 
+*/
+int Board::GetXPosInPixels (int pPos)
+{
+    return  ( ( BOARD_POSITION - (BLOCK_SIZE * (BOARD_WIDTH / 2)) ) + (pPos * BLOCK_SIZE) );
+}
+
+/* 
+======================================                                  
+Returns the vertical position (in pixels) of the block given like parameter
+
+Parameters:
+
+>> pPos:    Horizontal position of the block in the board
+====================================== 
+*/
+int Board::GetYPosInPixels (int pPos)
+{
+    return ( (mScreenHeight - (BLOCK_SIZE * BOARD_HEIGHT)) + (pPos * BLOCK_SIZE) );
+}
+
+/* 
+======================================                                  
+Check if the piece can be stored at this position without any collision
+Returns true if the movement is  possible, false if it not possible
+
+Parameters:
+
+>> pX:      Horizontal position in blocks
+>> pY:      Vertical position in blocks
+>> pPiece:  Piece to draw
+>> pRotation:   1 of the 4 possible rotations
+====================================== 
+*/
+bool Board::IsPossibleMovement (int pX, int pY, int pPiece, int pRotation)
+{
+    // Checks collision with pieces already stored in the board or the board limits
+    // This is just to check the 5x5 blocks of a piece with the appropiate area in the board
+    for (int i1 = pX, i2 = 0; i1 < pX + PIECE_BLOCKS; i1++, i2++)
+    {
+        for (int j1 = pY, j2 = 0; j1 < pY + PIECE_BLOCKS; j1++, j2++)
+        {   
+            // Check if the piece is outside the limits of the board
+            if (    i1 < 0          || 
+                i1 > BOARD_WIDTH  - 1   ||
+                j1 > BOARD_HEIGHT - 1)
+            {
+                if (mPieces->GetBlockType (pPiece, pRotation, j2, i2) != 0)
+                    return 0;       
+            }
+
+            // Check if the piece have collisioned with a block already stored in the map
+            if (j1 >= 0)    
+            {
+                if ((mPieces->GetBlockType (pPiece, pRotation, j2, i2) != 0) &&
+                    (!IsFreeBlock (i1, j1)) )
+                    return false;
+            }
+        }
+    }
+
+    // No collision
+    return true;
+}