added evaluation function for given moves

This commit is contained in:
Christian Kroll 2009-11-05 19:14:50 +00:00
parent 2e67e52e7b
commit 058677d773
2 changed files with 164 additions and 3 deletions

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@ -1,6 +1,118 @@
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include "piece.h"
#include "playfield.h"
#include "bast.h" #include "bast.h"
int bla()
/***************************
* non-interface functions *
***************************/
/* Function: tetris_bastet_clearColHeights;
* Description: resets the array for the column heights
* Argument pBastet: bastet instance whose array should be reset
* Return value: void
*/
void tetris_bastet_clearColHeights(tetris_bastet_t *pBastet)
{ {
return 0; int8_t nWidth = tetris_playfield_getWidth(pBastet->pPlayfield);
for (int i = 0; i < nWidth; ++i)
{
pBastet->pColHeights[i] = 0;
}
}
/****************************
* construction/destruction *
****************************/
/* Function: tetris_bastet_construct
* Description: constructs a bastet instance for a given playfield
* Argument pPlayfield: the playfield to be observed
* Return value: pointer to a newly created bastet instance
*/
tetris_bastet_t* tetris_bastet_construct(tetris_playfield_t *pPl)
{
tetris_bastet_t *pBastet =
(tetris_bastet_t *) malloc(sizeof(tetris_bastet_t));
pBastet->pPlayfield = pPl;
int8_t nWidth = tetris_playfield_getWidth(pBastet->pPlayfield);
pBastet->pColHeights = (int8_t*) calloc(nWidth, sizeof(int8_t));
tetris_bastet_clearColHeights(pBastet);
return pBastet;
}
/* Function: tetris_bastet_destruct
* Description: destructs the given bastet instance
* Argument pBastet: the bastet instance to be destroyed
* Return value: void
*/
void tetris_bastet_destruct(tetris_bastet_t *pBastet)
{
if (pBastet->pColHeights != NULL)
{
free(pBastet->pColHeights);
}
free(pBastet);
}
/****************************
* bastet related functions *
****************************/
/* Function: tetris_bastet_construct
* Description: calculates a score for a piece at a given column
* Argument pBastet: the bastet instance of interest
* Argument pPiece: the piece to be tested
* Argument pnColum: the column where the piece should be dropped
* Return value: score for the given move
*/
int16_t tetris_bastet_evalPos(tetris_bastet_t *pBastet,
tetris_piece_t *pPiece,
int8_t nColumn)
{
int16_t nScore = -32000;
// modify score based on complete lines
int8_t nLines = tetris_playfield_predictCompleteLines(pBastet->pPlayfield,
pPiece, nColumn);
nScore += 5000 * nLines;
// go through every row and calculate column heights
tetris_playfield_iterator_t iterator;
int8_t nWidth = tetris_playfield_getWidth(pBastet->pPlayfield);
int8_t nHeight = 1;
uint16_t *pDump = tetris_playfield_predictBottomRow(&iterator,
pBastet->pPlayfield, pPiece, nColumn);
while (pDump != NULL)
{
for (int x = 0; x < nWidth; ++x)
{
if ((*pDump & (0x0001 << x)) != 0)
{
pBastet->pColHeights[x] = nHeight;
}
}
pDump = tetris_playfield_predictNextRow(&iterator);
++nHeight;
}
// modify score based on predicted column heights
for (int x = 0; x < nWidth; ++x)
{
nScore -= 5 * pBastet->pColHeights[x];
}
// reset column height array for later use
tetris_bastet_clearColHeights(pBastet);
return nScore;
} }

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@ -1,6 +1,55 @@
#ifndef BAST_H_ #ifndef BAST_H_
#define BAST_H_ #define BAST_H_
int bla(); #include <inttypes.h>
#include "playfield.h"
#include "piece.h"
/*********
* types *
*********/
typedef struct tetris_bastet_t
{
tetris_playfield_t *pPlayfield; // the playfield to be examined
int8_t *pColHeights; // array of calculated column heights
}
tetris_bastet_t;
/****************************
* construction/destruction *
****************************/
/* Function: tetris_bastet_construct
* Description: constructs a bastet instance for a given playfield
* Argument pPlayfield: the playfield to be observed
* Return value: pointer to a newly created bastet instance
*/
tetris_bastet_t* tetris_bastet_construct(tetris_playfield_t *pPl);
/* Function: tetris_bastet_destruct
* Description: destructs the given bastet instance
* Argument pBastet: the bastet instance to be destroyed
* Return value: void
*/
void tetris_bastet_destruct(tetris_bastet_t *pBastet);
/****************************
* bastet related functions *
****************************/
/* Function: tetris_bastet_construct
* Description: calculates a score for a piece at a given column
* Argument pBastet: the bastet instance of interest
* Argument pPiece: the piece to be tested
* Argument pnColum: the column where the piece should be dropped
* Return value: score for the given move
*/
int16_t tetris_bastet_evalPos(tetris_bastet_t *pBastet,
tetris_piece_t *pPiece,
int8_t nColumn);
#endif /* BAST_H_ */ #endif /* BAST_H_ */