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rockbox/apps/plugins/snake.c

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 Itai Shaked
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
/*
Snake!
by Itai Shaked
ok, a little explanation -
board holds the snake and apple position - 1+ - snake body (the number
represents the age [1 is the snake's head]).
-1 is an apple, and 0 is a clear spot.
dir is the current direction of the snake - 0=up, 1=right, 2=down, 3=left;
*/
#include "plugin.h"
#ifdef HAVE_LCD_BITMAP
/* variable button definitions */
#if CONFIG_KEYPAD == RECORDER_PAD
#define SNAKE_QUIT BUTTON_OFF
#define SNAKE_PLAYPAUSE BUTTON_PLAY
#elif CONFIG_KEYPAD == ONDIO_PAD
#define SNAKE_QUIT BUTTON_OFF
#define SNAKE_PLAYPAUSE BUTTON_MENU
#endif
static int board[28][16],snakelength;
static unsigned int score,hiscore=0;
static short dir,frames,apple,level=1,dead=0;
static struct plugin_api* rb;
void die (void)
{
char pscore[5],hscore[17];
rb->lcd_clear_display();
rb->snprintf(pscore,sizeof(pscore),"%d",score);
rb->lcd_putsxy(3,12,"oops...");
rb->lcd_putsxy(3,22,"Your score :");
rb->lcd_putsxy(3,32, pscore);
if (score>hiscore) {
hiscore=score;
rb->lcd_putsxy(3,42,"New High Score!");
}
else {
rb->snprintf(hscore,sizeof(hscore),"High Score: %d",hiscore);
rb->lcd_putsxy(3,42,hscore);
}
rb->lcd_update();
rb->sleep(3*HZ);
dead=1;
}
void colission (short x, short y)
{
switch (board[x][y]) {
case 0:
break;
case -1:
snakelength+=2;
score+=level;
apple=0;
break;
default:
die();
break;
}
if (x==28 || x<0 || y==16 || y<0)
die();
}
void move_head (short x, short y)
{
switch (dir) {
case 0:
y-=1;
break;
case 1:
x+=1;
break;
case 2:
y+=1;
break;
case 3:
x-=1;
break;
}
colission (x,y);
if (dead)
return;
board[x][y]=1;
rb->lcd_fillrect(x*4,y*4,4,4);
}
void frame (void)
{
short x,y,head=0;
for (x=0; x<28; x++) {
for (y=0; y<16; y++) {
switch (board[x][y]) {
case 1:
if (!head) {
move_head(x,y);
if (dead)
return;
board[x][y]++;
head=1;
}
break;
case 0:
break;
case -1:
break;
default:
if (board[x][y]==snakelength) {
board[x][y]=0;
rb->lcd_clearrect(x*4,y*4,4,4);
}
else
board[x][y]++;
break;
}
}
}
rb->lcd_update();
}
void redraw (void)
{
short x,y;
rb->lcd_clear_display();
for (x=0; x<28; x++) {
for (y=0; y<16; y++) {
switch (board[x][y]) {
case -1:
rb->lcd_fillrect((x*4)+1,y*4,2,4);
rb->lcd_fillrect(x*4,(y*4)+1,4,2);
break;
case 0:
break;
default:
rb->lcd_fillrect(x*4,y*4,4,4);
break;
}
}
}
rb->lcd_update();
}
void game_pause (void) {
int button;
rb->lcd_clear_display();
rb->lcd_putsxy(3,12,"Game Paused");
#if CONFIG_KEYPAD == RECORDER_PAD
rb->lcd_putsxy(3,22,"[Play] to resume");
#elif CONFIG_KEYPAD == ONDIO_PAD
rb->lcd_putsxy(3,22,"[Menu] to resume");
#endif
rb->lcd_putsxy(3,32,"[Off] to quit");
rb->lcd_update();
while (1) {
button=rb->button_get(true);
switch (button) {
case SNAKE_QUIT:
dead=1;
return;
case SNAKE_PLAYPAUSE:
redraw();
rb->sleep(HZ/2);
return;
default:
if (rb->default_event_handler(button)==SYS_USB_CONNECTED) {
dead=2;
return;
}
break;
}
}
}
void game (void) {
int button;
short x,y;
while (1) {
frame();
if (dead)
return;
frames++;
if (frames==10) {
frames=0;
if (!apple) {
do {
x=rb->rand() % 28;
y=rb->rand() % 16;
} while (board[x][y]);
apple=1;
board[x][y]=-1;
rb->lcd_fillrect((x*4)+1,y*4,2,4);
rb->lcd_fillrect(x*4,(y*4)+1,4,2);
}
}
rb->sleep(HZ/level);
button=rb->button_get(false);
switch (button) {
case BUTTON_UP:
if (dir!=2) dir=0;
break;
case BUTTON_RIGHT:
if (dir!=3) dir=1;
break;
case BUTTON_DOWN:
if (dir!=0) dir=2;
break;
case BUTTON_LEFT:
if (dir!=1) dir=3;
break;
case SNAKE_QUIT:
dead=1;
return;
case SNAKE_PLAYPAUSE:
game_pause();
break;
default:
if (rb->default_event_handler(button)==SYS_USB_CONNECTED) {
dead=2;
return;
}
break;
}
}
}
void game_init(void) {
int button;
short x,y;
char plevel[10],phscore[20];
for (x=0; x<28; x++) {
for (y=0; y<16; y++) {
board[x][y]=0;
}
}
dead=0;
apple=0;
snakelength=4;
score=0;
board[11][7]=1;
rb->lcd_clear_display();
rb->lcd_setfont(FONT_SYSFIXED);
rb->snprintf(plevel,sizeof(plevel),"Level - %d",level);
rb->snprintf(phscore,sizeof(phscore),"High Score: %d",hiscore);
rb->lcd_puts(0,0, plevel);
rb->lcd_puts(0,1, "(1-slow, 9-fast)");
rb->lcd_puts(0,2, "OFF - quit");
#if CONFIG_KEYPAD == RECORDER_PAD
rb->lcd_puts(0,3, "PLAY - start/pause");
#elif CONFIG_KEYPAD == ONDIO_PAD
rb->lcd_puts(0,3, "MENU - start/pause");
#endif
rb->lcd_puts(0,4, phscore);
rb->lcd_update();
while (1) {
button=rb->button_get(true);
switch (button) {
case BUTTON_RIGHT:
case BUTTON_UP:
if (level<9)
level++;
break;
case BUTTON_LEFT:
case BUTTON_DOWN:
if (level>1)
level--;
break;
case SNAKE_QUIT:
dead=1;
return;
break;
case SNAKE_PLAYPAUSE:
return;
break;
default:
if (rb->default_event_handler(button)==SYS_USB_CONNECTED) {
dead=2;
return;
}
break;
}
rb->snprintf(plevel,sizeof(plevel),"Level - %d",level);
rb->lcd_puts(0,0, plevel);
rb->lcd_update();
}
}
enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
{
TEST_PLUGIN_API(api);
(void)(parameter);
rb = api;
game_init();
rb->lcd_clear_display();
game();
return (dead==1)?PLUGIN_OK:PLUGIN_USB_CONNECTED;
}
#endif
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