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

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2010-01-21 14:45:16 +00:00
/*
* 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)
*
*/
2010-01-21 13:40:40 +00:00
#include "rebound.h"
#include <stdio.h>
static uint8_t rbpos;
uint8_t rebound_getpos ()
{
return (rbpos + (REBOUND_SIZE / 2));
}
void rebound_init()
{
rbpos = (NUM_ROWS / 2) - (REBOUND_SIZE / 2);
rebound_draw();
}
void rebound_draw ()
{
uint8_t i;
for (i=rbpos;i<rbpos + REBOUND_SIZE;i++)
{
playfield_set (i, NUM_ROWS-1, rb); /* set rebound pixel */
}
}
void rebound_tick()
{
/* directions are inverted (JOYISLEFT means RIGHT) */
if (JOYISRIGHT && rbpos)
{
playfield_set (rbpos + REBOUND_SIZE, NUM_ROWS-1, sp); /* clear rebound pixel */
rbpos--;
playfield_set (rbpos, NUM_ROWS-1, rb); /* set rebound pixel */
}
if (JOYISLEFT && rbpos < (NUM_COLS - (REBOUND_SIZE+1)))
{
playfield_set (rbpos, NUM_ROWS-1, sp); /* clear rebound pixel */
rbpos++;
playfield_set (rbpos + REBOUND_SIZE, NUM_ROWS-1, rb); /* set rebound pixel */
}
rebound_draw();
}