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#ifndef ENGINE_H
#define ENGINE_H
/*
* Copyright (c) Abraham vd Merwe <abz@blio.net>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the names of other contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "typedefs.h" /* bool */
/*
* Macros
*/
/* Number of shapes in the game */
#define NUMSHAPES 7
/* Number of blocks in each shape */
#define NUMBLOCKS 4
/* Number of rows and columns in board */
#define NUMROWS 23
#define NUMCOLS 13
/* Wall id - Arbitrary, but shouldn't have the same value as one of the colors */
#define WALL 16
/*
* Type definitions
*/
typedef int board_t[NUMCOLS][NUMROWS];
typedef struct
{
int x,y;
} block_t;
typedef struct
{
int color;
int type;
bool flipped;
block_t block[NUMBLOCKS];
} shape_t,shapes_t[NUMSHAPES];
typedef struct
{
int moves;
int rotations;
int dropcount;
int efficiency;
int droppedlines;
} status_t;
typedef struct engine_struct
{
int curx,cury; /* coordinates of current piece */
int curshape,nextshape; /* current & next shapes */
int score; /* score */
shapes_t shapes; /* shapes */
board_t board; /* board */
status_t status; /* current status of shapes */
void (*score_function)(struct engine_struct *); /* score function */
} engine_t;
typedef enum { ACTION_LEFT, ACTION_ROTATE, ACTION_RIGHT, ACTION_DROP } action_t;
/*
* Global variables
*/
extern const shapes_t SHAPES;
/*
* Functions
*/
/*
* Initialize specified tetris engine
*/
void engine_init (engine_t *engine,void (*score_function)(engine_t *));
/*
* Perform the given action on the specified tetris engine
*/
void engine_move (engine_t *engine,action_t action);
/*
* Evaluate the status of the specified tetris engine
*
* OUTPUT:
* 1 = shape moved down one line
* 0 = shape at bottom, next one released
* -1 = game over (board full)
*/
int engine_evaluate (engine_t *engine);
#endif /* #ifndef ENGINE_H */
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