139 lines
2.8 KiB
C
139 lines
2.8 KiB
C
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#include "../config.h"
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#include "../compat/pgmspace.h"
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#include "../menu/menu.h"
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#include "../pixel.h"
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#include "../random/prng.h"
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#include "../util.h"
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#include "../joystick.h"
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// MSB is leftmost pixel
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static uint8_t icon[8] PROGMEM =
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{0xff, 0x81, 0xbd, 0xa5, 0xa5, 0xad, 0xa1, 0xbf}; // Snake icon
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void snake_game();
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game_descriptor_t snake_game_descriptor __attribute__((section(".game_descriptors"))) ={
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&snake_game,
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icon,
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};
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void snake_game() {
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pixel pixels[64] = {{4, 14},{4, 13}};
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pixel * head = &pixels[1];
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pixel * tail = &pixels[0];
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pixel old_head;
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pixel apples[10];
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uint8_t joy, joy_old=0xff, joy_cmd=0xff;
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unsigned char x, y, dead = 0;
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unsigned char apple_num = 0;
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direction dir = up;
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unsigned char apple_found = 0;
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unsigned char j;
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clear_screen(0);
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// zeichne Rahmen
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for (x = 0; x < NUM_COLS; x++) {
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for (y = 0; y < NUM_ROWS; y++) {
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if (((x == 0) || (x == NUM_COLS-1)) ||
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((y == 0) || (y == NUM_ROWS-1))) {
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setpixel((pixel) {x, y}, 3);
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}
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}
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}
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x = 0;
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while (1) {
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x++;
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old_head = *head;
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++head;
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if (head == pixels + 64)
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head = pixels;
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if (joy_cmd == right) {
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dir = direction_r(dir);
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joy_cmd = 0xff;
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} else if (joy_cmd == left) {
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dir = direction_r(dir);
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dir = direction_r(dir);
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dir = direction_r(dir);
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joy_cmd = 0xff;
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}
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// kopf einen weiter bewegen
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*head = next_pixel(old_head, dir);
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apple_found = 0;
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// pr?fen ob man auf nen Apfel drauf ist
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for (j = 0; j < apple_num; j++) {
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if ( ( head->x == apples[j].x) &&
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(head->y == apples[j].y) ){
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apple_found = 1;
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for(; j < apple_num - 1; j++) {
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apples[j] = apples[j+1];
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}
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apple_num--;
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goto apple_se;
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}
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}
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if (get_pixel(*head)) {
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dead = 1;
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}
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apple_se:
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if (!dead) {
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setpixel(*head, 3);
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// setze neue ?pfel
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if ( (apple_num < 9) && (random8() < 10) ) {
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pixel new_apple = (pixel) {(random8() % (NUM_COLS-2))+1,
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(random8() % (NUM_ROWS-2))+1};
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if (!get_pixel(new_apple)){
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apples[apple_num++] = new_apple;
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}
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}
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// l?sche Ende
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if (!apple_found && !dead) {
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clearpixel(*tail);
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if (++tail == pixels + 64)
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tail = pixels;
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}
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} else {
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while (tail != head) {
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clearpixel(*tail);
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if ((++tail) > pixels + 64)
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tail = pixels;
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wait (60);
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}
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break;
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}
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for (j = 0; j < apple_num; j++) {
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if (x % 2) {
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setpixel(apples[j], 3);
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} else {
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clearpixel(apples[j]);
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}
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}
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for(j=0;j<20;j++){
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if(JOYISLEFT){
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joy = left;
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}else if(JOYISRIGHT){
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joy = right;
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}else{
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joy = 0xff;
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}
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if(joy != joy_old){
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joy_cmd = joy;
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}
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joy_old = joy;
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wait (5);
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}
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}
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}
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