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columns.c
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columns.c
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/*
Core routines for columns game.
---------------------------------------------------------------------
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
---------------------------------------------------------------------
en el centro el tablero (ocupa 1 tercio exacto de la pantalla)
a la izquierda la pieza siguiente, la puntuacion, el nivel,
las joyas que has hecho, a la derecha el logotipo.
Tablero de 7x12
0 = hueco (negro)
1 = azul
2 = rojo
3 = morado
4 = verde
5 = cyan
6 = amarillo
7 = blanco = especial
8 = (o mayor) bloque marcado para borrar con animacion
La animacion consiste en dibujar en los siguientes 7
fotogramas cada uno de los bloques anteriores. El octavo
fotograma es negro y el noveno es que cae hacia abajo.
color_actual = valor - 7;
if( valor = 15 ) -> pintar negro (poner los > 8 a cero)
if( valor = 16 ) -> hacer caer los bloques si bloque = 0;
96x192 Piezas de 16x12 pixels centradas = 12x12 (bordes
derechos e izquierdos con fondo).
*/
//--- Variables and defines -------------------------------------------
#define board_width 7
#define board_height 12
#define board_size board_width * board_height
#define empty 0
#define special 7
#define deleteit 8
#define num_blocks 6
#define x_board 10
#define special_chance 96
#define incr 31
#define decr 31
unsigned char board[ board_size ];
// Optimize the (y*board_width) multiplication
#define YBYWIDTH(y) ( ((y)<<2) + ((y)<<1) + (y))
//#define YBYWIDTH(y) ( ((y)<<2) + ((y)<<1) )
//#define YBYWIDTH(y) ( (y)*7 )
// Optimized: n*6 = n*4 + n*2 = n<<2 + n<<1
#define GetBoard( x, y ) \
(board[YBYWIDTH(y)+(x)])
#define SetBoard( x, y, val ) \
(board[YBYWIDTH(y)+(x)] = (val))
#define SetTMPBoard( x, y, val ) \
(tmpboard[YBYWIDTH(y)+(x)] = (val))
#define GetBoardClip( x, y ) \
if( (x) > 0 && (x) < board_width && \
(y) > 0 && (y) < board_height ) \
(board[YBYWIDTH(y)+(x)])
#define SetBoardClip( x, y, val ) \
if( (x) > 0 && (x) < board_width && \
(y) > 0 && (y) < board_height ) \
(board[YBYWIDTH(y)+(x)] = (val))
//--- Functions -------------------------------------------------------
void ClearBoard( void );
int CheckBoard( void );
void BlocksDown( void );
int FindSlot( int x );
void DrawBoard( void );
void RedrawBoard( void );
void EraseBoard( void );
void DrawBlock( int x, int y, unsigned char up,
unsigned char middle, unsigned char bottom, char first );
void DrawNextBlock( int x, int y, unsigned char up,
unsigned char middle, unsigned char bottom );
void EraseBlock( int x, int y, char first );
int CanFall( int x, int y, char first );
void InsertBlock( int x, int y, unsigned char up,
unsigned char middle, unsigned char bottom, char first );
void GenerateBlock( unsigned int *up, unsigned int *middle,
unsigned int *bottom );
int CanMoveLeft( int x, int y, char first );
int CanMoveRight( int x, int y, char first );
//--- Clear the entie board ------------------------------------------
void GenerateBlock( unsigned int *up, unsigned int *middle,
unsigned int *bottom )
{
int tmp;
tmp = (unsigned char) (abs(rand()) % 100 )+1;
if( tmp >= special_chance )
{
*up = *middle = *bottom = 7;
}
else
{
*up = (unsigned char) (abs(rand()) % num_blocks)+1;
*middle = (unsigned char) (abs(rand()) % num_blocks)+1;
*bottom = (unsigned char) (abs(rand()) % num_blocks)+1;
}
}
//--- Clear the entire board ------------------------------------------
#define ClearBoard() memset(board, (unsigned char) empty, board_size);
//--- Insert the block in the array -----------------------------------
void InsertBlock( int x, int y, unsigned char up,
unsigned char middle, unsigned char bottom, char first)
{
if( first == 0 )
{
SetBoard( x, y, up );
SetBoard( x, y+1, middle );
SetBoard( x, y+2, bottom );
}
else if( first == 1 )
{
SetBoard( x, y, middle );
SetBoard( x, y+1, bottom );
}
else if( first == 2 )
{
SetBoard( x, y, bottom );
}
}
//--- Can fall: 1: current block can fall, 0: can't -------------------
int CanFall( int x, int y, char first )
{
if( (y-first)+3 > board_height-1 ) return(0);
if( GetBoard(x, (y-first)+3) != 0 ) return(0);
return(1);
}
//--- Can move left ---------------------------------------------------
int CanMoveLeft( int x, int y, char first )
{
if( x <= 0 ) return(0);
if( GetBoard(x-1, y-first+2) != 0 ) return(0);
return(1);
}
//--- Can move right --------------------------------------------------
int CanMoveRight( int x, int y, char first )
{
if( x >= board_width-1 ) return(0);
if( GetBoard(x+1, y-first+2) != 0 ) return(0);
return(1);
}
//--- Draw the entire board -------------------------------------------
void DrawBoard( void )
{
int x, y;
// first clear the board to the given color (black)
SetSpriteAttrib( x_board, 0, board_width<<1 , board_height<<1, 0 );
for( y=0; y<board_height; y++ )
for( x=0; x<board_width; x++ )
DrawSpriteBlockNOATTR( x_board+(x<<1), (y<<1), 2, 2, Grafico );
DrawSpriteBlockNOATTR( 27, 5, 2, 2, Grafico );
DrawSpriteBlockNOATTR( 27, 7, 2, 2, Grafico );
DrawSpriteBlockNOATTR( 27, 9, 2, 2, Grafico );
}
//--- Clear the entire board ------------------------------------------
void ReplaceBySpecial( int xb, int yb )
{
int x;
unsigned char tmp;
tmp = GetBoard( xb, yb );
for( x=0; x<board_size; x++ )
if( board[x] == tmp ) board[x] = special;
}
//--- Find an empty slot ----------------------------------------------
// (returns 666 if there is not empty slot)
int FindSlot( int x )
{
int y;
for( y=board_height-1; y>=0; y-- )
if( GetBoard(x, y) == 0 ) return(y);
return(666);
}
//--- Draw the entire board -------------------------------------------
void RedrawBoard( void )
{
int x, y, donde;
unsigned char attr;
unsigned char *memoffset;
x = x_board;
y = 0;
// memoffset = 0x4000 + 61414 + (y*32*2) + (x*2)
memoffset = (unsigned char *) (0x4000 + 6144 + (y << 6) + (x)) ;
for( y=0; y<board_height; y++ )
{
donde = YBYWIDTH(y);
attr = (unsigned char) attributes[board[donde++]];
*memoffset = attr + 64; memoffset++;
*memoffset = attr; memoffset += incr;
*memoffset = attr; memoffset++;
*memoffset = attr; memoffset -= decr;
attr = (unsigned char) attributes[board[donde++]];
*memoffset = attr + 64; memoffset++;
*memoffset = attr; memoffset += incr;
*memoffset = attr; memoffset++;
*memoffset = attr; memoffset -= decr;
attr = (unsigned char) attributes[board[donde++]];
*memoffset = attr + 64; memoffset++;
*memoffset = attr; memoffset += incr;
*memoffset = attr; memoffset++;
*memoffset = attr; memoffset -= decr;
attr = (unsigned char) attributes[board[donde++]];
*memoffset = attr + 64; memoffset++;
*memoffset = attr; memoffset += incr;
*memoffset = attr; memoffset++;
*memoffset = attr; memoffset -= decr;
attr = (unsigned char) attributes[board[donde++]];
*memoffset = attr + 64; memoffset++;
*memoffset = attr; memoffset += incr;
*memoffset = attr; memoffset++;
*memoffset = attr; memoffset -= decr;
attr = (unsigned char) attributes[board[donde++]];
*memoffset = attr + 64; memoffset++;
*memoffset = attr; memoffset += incr;
*memoffset = attr; memoffset++;
*memoffset = attr; memoffset -= decr;
attr = (unsigned char) attributes[board[donde++]];
*memoffset = attr + 64; memoffset++;
*memoffset = attr; memoffset += incr;
*memoffset = attr; memoffset++;
*memoffset = attr;
memoffset += 32-((board_width << 1)-1);
}
}
//--- Erase the entire board -------------------------------------------
void EraseBoard( void )
{
int x, y;
unsigned char *memoffset;
x = x_board; y = 0;
memoffset = (unsigned char *) (0x4000 + 6144 + (y << 6) + (x)) ;
for( y=0; y<board_height<<1; y++ )
{
*memoffset = 0; memoffset++;
*memoffset = 0; memoffset++;
*memoffset = 0; memoffset++;
*memoffset = 0; memoffset++;
*memoffset = 0; memoffset++;
*memoffset = 0; memoffset++;
*memoffset = 0; memoffset++;
*memoffset = 0; memoffset++;
*memoffset = 0; memoffset++;
*memoffset = 0; memoffset++;
*memoffset = 0; memoffset++;
*memoffset = 0; memoffset++;
*memoffset = 0; memoffset++;
*memoffset = 0;
memoffset += 32-((board_width << 1)-1);
}
}
//--- Draw the piece -----------------------------------------------
void DrawBlock( int x, int y, unsigned char up, unsigned char middle,
unsigned char bottom, char first )
{
unsigned char attr;
unsigned char *memoffset;
memoffset = (unsigned char *) (0x4000 + 6144 + (y << 6) + (x << 1) + x_board) ;
// first = 2 when we are drawing just a single block (yb=-2)
if( first == 2 )
{
attr = attributes[bottom];
// bottom block : add bright attribute
*memoffset = attr + 64; memoffset++;
*memoffset = attr; memoffset += incr;
*memoffset = attr; memoffset++;
*memoffset = attr;
}
// first = 1 when we are drawing just 2 blocks (yb=-1)
else if( first == 1 )
{
attr = attributes[middle];
// upper-left block : add bright attribute
*memoffset = attr + 64; memoffset++;
*memoffset = attr; memoffset += incr;
*memoffset = attr; memoffset++;
*memoffset = attr; memoffset += incr;
attr = attributes[bottom];
// upper-left block : add bright attribute
*memoffset = attr + 64; memoffset++;
*memoffset = attr; memoffset += incr;
*memoffset = attr; memoffset++;
*memoffset = attr;
}
// all 3 blocks are displayed
else
{
attr = attributes[up];
// upper-left block : add bright attribute
*memoffset = attr + 64; memoffset++;
*memoffset = attr; memoffset += incr;
*memoffset = attr; memoffset++;
*memoffset = attr; memoffset += incr;
attr = attributes[middle];
// upper-left block : add bright attribute
*memoffset = attr + 64; memoffset++;
*memoffset = attr; memoffset += incr;
*memoffset = attr; memoffset++;
*memoffset = attr; memoffset += incr;
attr = attributes[bottom];
// upper-left block : add bright attribute
*memoffset = attr + 64; memoffset++;
*memoffset = attr; memoffset += incr;
*memoffset = attr; memoffset++;
*memoffset = attr;
} // else
}
//--- Draw the piece -----------------------------------------------
void DrawNextBlock( int x, int y, unsigned char up, unsigned char middle, unsigned char bottom )
{
unsigned char *memoffset;
unsigned char attr;
// memoffset = 0x4000 + 61414 + (y*32) + x
memoffset = (unsigned char *) (0x4000 + 6144 + (y*32) + (x)) ;
attr = attributes[up];
// upper-left block : add bright attribute
*memoffset = attr + 64; memoffset++;
*memoffset = attr; memoffset += incr;
*memoffset = attr; memoffset++;
*memoffset = attr; memoffset += incr;
attr = attributes[middle];
// upper-left block : add bright attribute
*memoffset = attr + 64; memoffset++;
*memoffset = attr; memoffset += incr;
*memoffset = attr; memoffset++;
*memoffset = attr; memoffset += incr;
attr = attributes[bottom];
// upper-left block : add bright attribute
*memoffset = attr + 64; memoffset++;
*memoffset = attr; memoffset += incr;
*memoffset = attr; memoffset++;
*memoffset = attr;
}
//--- Erase the piece -----------------------------------------------
void EraseBlock( int x, int y, char first )
{
unsigned char attr;
unsigned char *memoffset;
memoffset = (unsigned char *) (0x4000 + 6144 + (y << 6) + (x << 1) + x_board) ;
attr = 0;
// erase just first block
if( first == 2 )
{
// memoffset = 0x4000 + 61414 + (y*32*2) + (x*2)
//attr = (unsigned char) attributes[GetBoard(x,y+2)];
*memoffset = attr; memoffset++;
*memoffset = attr; memoffset += incr;
*memoffset = attr; memoffset++;
*memoffset = attr;
}
// erase two blocks
else if( first == 1 )
{
//attr = (unsigned char) attributes[GetBoard(x,y+1)];
*memoffset = attr; memoffset++;
*memoffset = attr; memoffset += incr;
*memoffset = attr; memoffset++;
*memoffset = attr; memoffset += incr;
//attr = (unsigned char) attributes[GetBoard(x,y+2)];
*memoffset = attr; memoffset++;
*memoffset = attr; memoffset += incr;
*memoffset = attr; memoffset++;
*memoffset = attr;
}
// erase three blocks
else
{
//attr = (unsigned char) attributes[GetBoard(x,y)];
*memoffset = attr; memoffset++;
*memoffset = attr; memoffset += incr;
*memoffset = attr; memoffset++;
*memoffset = attr; memoffset += incr;
//attr = (unsigned char) attributes[GetBoard(x,y+1)];
*memoffset = attr; memoffset++;
*memoffset = attr; memoffset += incr;
*memoffset = attr; memoffset++;
*memoffset = attr; memoffset += incr;
//attr = (unsigned char) attributes[GetBoard(x,y+2)];
*memoffset = attr; memoffset++;
*memoffset = attr; memoffset += incr;
*memoffset = attr; memoffset++;
*memoffset = attr;
}
}
//--- Make the blocks fall --------------------------------------------
void BlocksDown( void )
{
int mx, my, mf;
unsigned char dato;
//--- fall version: all blocks fall at a time ---
for( my=board_height-1; my>0; my-- )
for( mx=0; mx<board_width; mx++ )
{
dato = GetBoard(mx, my);
if( dato == empty || dato == special )
{
for( mf=my-1; mf>=0; mf--)
{
dato = GetBoard(mx,mf);
if( dato != empty && dato != special) break;
}
SetBoard( mx, mf, empty );
SetBoard( mx, my, dato );
}
}
}
//--- Check the entire board for valid combinations -------------------
//--- it also checks for "deleteit" blocks and updates them -------------
//--- returns number of games done * 8 --------------------------------
int CheckBoard( void )
{
int x, y;
unsigned char dato, retcode;
unsigned char tmpboard[ board_size ];
// make a copy of the board to work in
memcpy( tmpboard, board, board_size );
retcode = 0;
for( y=0; y<board_height; y++ )
for( x=0; x<board_width; x++ )
{
// get current data and ...
dato = GetBoard( x, y );
//----------------------------------------------
// Check for valid combinations
//----------------------------------------------
// we start on 2 because the UP and LEFT tests will test the 0 &
// 1 blocks when testing the block number 2 for a valid combination
// Up-left and up-right tests will detect down-left & down-right
if ( dato < deleteit && dato != special && dato != empty )
{
if( y>=2 )
{
// check for up combinations
if( dato == GetBoard( x, y-1) &&
dato == GetBoard( x, y-2 ) )
{
SetTMPBoard( x, y, special );
SetTMPBoard( x, y-1, special );
SetTMPBoard( x, y-2, special );
retcode++;
}
if( x>= 2 )
{
// check for up - left combinations
if( dato == GetBoard( x-1, y-1) &&
dato == GetBoard( x-2, y-2 ) )
{
SetTMPBoard( x, y, special );
SetTMPBoard( x-1, y-1, special );
SetTMPBoard( x-2, y-2, special );
retcode++;
}
}
}
if( x>= 2)
{
// check for left combinations
if( dato == GetBoard( x-1, y) &&
dato == GetBoard( x-2, y ) )
{
SetTMPBoard( x, y, special );
SetTMPBoard( x-1, y, special );
SetTMPBoard( x-2, y, special );
retcode++;
}
}
if( y>=2 && x <= board_width-3 )
{
// check for up - right combinations
if( dato == GetBoard( x+1, y-1) &&
dato == GetBoard( x+2, y-2 ) )
{
SetTMPBoard( x, y, special );
SetTMPBoard( x+1, y-1, special );
SetTMPBoard( x+2, y-2, special );
retcode++;
}
}
}
//----------------------------------------------
if( dato == 15 )
{
SetTMPBoard( x, y, 0 );
}
else if( dato >= deleteit )
{
SetTMPBoard( x, y, dato+1 );
}
}
// now copy the temp board to the real one.
memcpy( board, tmpboard, board_size );
return(retcode);
}