62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
/*
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* File: game.h
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* Author: Jeremy Rand
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* Date: July 23, 2014
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*
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* This file has the external definitions for the game interface.
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*/
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#include <stdint.h>
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#include <stdbool.h>
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#define BOARD_SIZE 4
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// A 4x4 board is actually represented as a 6x6 board internally. This gives
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// us special tiles around the whole board which can have a value which
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// prevents tiles from scrolling beyond the bounds of the board. Also, this
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// is why the values of DIR_DOWN and DIR_UP in the game.h file is a bit
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// strange.
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#define NUM_TILES ((BOARD_SIZE + 2) * (BOARD_SIZE + 2))
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#define POS_TO_X(pos) ((pos) % (BOARD_SIZE + 2))
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#define POS_TO_Y(pos) ((pos) / (BOARD_SIZE + 2))
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#define X_Y_TO_POS(x, y) (((y) * (BOARD_SIZE + 2)) + (x))
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#define DIR_DOWN (BOARD_SIZE + 2)
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#define DIR_UP (-(DIR_DOWN))
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#define DIR_RIGHT 1
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#define DIR_LEFT -1
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typedef int8_t tDir;
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typedef int8_t tPos;
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typedef uint32_t tScore;
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typedef void (*tTileMoveCallback)(tPos from, tPos to, char *tileString);
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typedef void (*tNewTileCallback)(tPos at, char *tileString);
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extern void initGameEngine(tTileMoveCallback tileMoveCallback,
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tNewTileCallback newTileCallback);
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extern void shutdownGameEngine(void);
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extern void newGame(void);
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extern void slideInDirection(tDir dir);
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extern tScore currentScore(void);
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extern tScore highScore(void);
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extern tScore highestTarget(void);
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extern tScore nextTarget(void);
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extern bool isGameWon(void);
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extern bool isGameLost(void);
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// Positions are 1 based so the top-left corner is (1, 1) and the bottom-right
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// corner is (BOARD_SIZE, BOARD_SIZE).
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extern char *tileStringForPos(tPos x, tPos y);
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