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

45 lines
877 B
C

#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();
}