borgware-2d/games/tetris/piece.h

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#ifndef TETRIS_PIECE_H_
#define TETRIS_PIECE_H_
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#include <stdint.h>
/**
* \defgroup TetrisPieceTypes Piece: Data types
*/
/*@{*/
/*********
* types *
*********/
/** shape attributes for a piece */
typedef enum tetris_piece_shape_t
{
TETRIS_PC_LINE, /**< the I shaped brick */
TETRIS_PC_T, /**< the T shaped brick */
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TETRIS_PC_SQUARE, /**< the square shaped brick */
TETRIS_PC_L, /**< the L shaped brick */
TETRIS_PC_LBACK, /**< the reverse L shaped brick */
TETRIS_PC_S, /**< the S shaped brick */
TETRIS_PC_Z /**< the Z shaped brick */
}
tetris_piece_shape_t;
/** possible angles for a brick */
typedef enum tetris_piece_angle_t
{
TETRIS_PC_ANGLE_0, /**< standard angle */
TETRIS_PC_ANGLE_90, /**< rotated by 90 degrees */
TETRIS_PC_ANGLE_180, /**< rotated by 180 degrees */
TETRIS_PC_ANGLE_270 /**< rotated by 270 degrees */
}
tetris_piece_angle_t;
/** rotation attributes */
typedef enum tetris_piece_rotation_t
{
TETRIS_PC_ROT_CW, /**< clockwise rotation */
TETRIS_PC_ROT_CCW /**< counter clockwise rotation */
}
tetris_piece_rotation_t;
/**
* describes the attributes of a piece
* @see tetris_piece_shape_t
* @see tetris_piece_angle_t
*/
typedef struct tetris_piece_t
{
tetris_piece_shape_t shape; /**< specifies the shape of the piece */
tetris_piece_angle_t angle; /**< specifies one of 4 angels */
}
tetris_piece_t;
/*@}*/
/**
* \defgroup TetrisPieceRelated Piece: Interface functions
*/
/*@{*/
/*****************************
* construction/destruction *
*****************************/
/**
* constructs a piece with the given attributes
* @param s shape of the piece (see tetris_piece_shape_t)
* @param a its angle (see tetris_piece_angel_t)
* @return pointer to a newly created piece
*/
tetris_piece_t *tetris_piece_construct(tetris_piece_shape_t s,
tetris_piece_angle_t a);
/**
* destructs a piece
* @param pPc pointer to the piece to be destructed
*/
void tetris_piece_destruct(tetris_piece_t *pPc);
/***************************
* piece related functions *
***************************/
/**
* returns bitfield representation of the piece
* @param pPc piece from which the bitfield shuld be retrieved
* @return bitfield representation of the piece
*/
uint16_t tetris_piece_getBitmap(tetris_piece_t *pPc);
/**
* rotates a piece
* @param pPc piece to rotate
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* @param nRotation type of rotation (see tetris_piece_rotation_t)
*/
void tetris_piece_rotate(tetris_piece_t *pPc,
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tetris_piece_rotation_t nRotation);
/**
* changes the shape of a piece
* @param pPc piece to change
* @param shape the shape of interest
*/
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inline static void tetris_piece_setShape(tetris_piece_t *pPc,
tetris_piece_shape_t shape)
{
assert(pPc != NULL);
assert((shape >= 0) && (shape <= TETRIS_PC_Z));
pPc->shape = shape;
}
/**
* changes the angle of a piece
* @param pPc piece to change
* @param angle the angle of interest
*/
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inline static void tetris_piece_setAngle(tetris_piece_t *pPc,
tetris_piece_angle_t angle)
{
assert(pPc != NULL);
assert((angle >= TETRIS_PC_ANGLE_0) && (angle <= TETRIS_PC_ANGLE_270));
pPc->angle = angle;
}
/**
* returns the number of different angles
* @param pPc piece whose angle count we want to know
* @return number of different angles
*/
int8_t tetris_piece_getAngleCount(tetris_piece_t *pPc);
/*@}*/
#endif /*TETRIS_PIECE_H_*/