borgware-2d/games/breakout/level.c

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/*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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., 59 Temple
* Place - Suite 330, Boston, MA 02111-1307 USA.
*
* Author & Copyright (C) 2010: Soeren Heisrath (forename@surename.org)
*
*/
#include "level.h"
static uint16_t maxscore;
/* real level definition */
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game_field_t level_field (uint8_t in_x, uint8_t in_y, uint8_t in_lvl);
game_field_t level_field (uint8_t in_x, uint8_t in_y, uint8_t in_lvl)
{
switch (in_lvl)
{
case 0:
/* space for the lower half of the level */
if (in_y > (NUM_ROWS / 3))
return sp;
return b1; /* b1-blocks for the rest */
case 1:
/* space for the lower half of the level */
if (in_y > (NUM_ROWS / 2))
return sp;
/* type 2 bricks for 1/4th of the field */
if (in_y <= (NUM_ROWS / 4))
return b2;
/* fill the rest with type 1 */
return b1;
break;
case 3:
/* add a row of solid bricks right in the middle of the field */
if (in_y == (NUM_ROWS / 2) &&
(in_x > (NUM_COLS / 4)) && (in_x < (NUM_COLS - (NUM_COLS / 4))))
return bs;
/* intentional fallthrough: the rest of level 3 is like level 2 */
case 2:
/* space for the lower third of the level */
if (in_y > (NUM_ROWS / 3))
return sp;
/* type 3 bricks for 1/8th of the field */
if (in_y <= (NUM_ROWS / 8))
return b3;
/* type 2 bricks for 1/4th of the field */
if (in_y <= (NUM_ROWS / 4))
return b2;
/* fill the rest with type 1 */
return b1;
default: /* random level generation */
/* space for the lower half of the level */
if (in_y > (NUM_ROWS / 2))
return sp;
return random8() & 0x03; /* fill field with random bricks (and spaces) */
break;
}
}
void level_init (uint8_t in_levelnum)
{
uint8_t x,y;
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game_field_t tmp;
maxscore = 0;
for (x=0;x<NUM_COLS;x++)
{
for (y=0;y<NUM_ROWS;y++)
{
tmp = level_field (x, y, in_levelnum);
playfield_set (x,y, tmp);
if (tmp <= b3)
maxscore += tmp;
}
}
maxscore += score_get();
}
uint16_t level_getscorediff ()
{
return maxscore - score_get();
}