Changed characters used, added preview of next part, added scoring and fixed some bugs
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b26e2e7876
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171
src/main.c
171
src/main.c
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@ -1,14 +1,20 @@
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#include "console.h"
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#include "convert.h"
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#include "random.h"
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const char* tetromino[7];
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#define WIDTH 12
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#define HEIGHT 18
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#define SCALE 1
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#define SPEED 20
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const char* tetromino[7];
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uint8_t field[WIDTH*HEIGHT];
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uint8_t screen[WIDTH*HEIGHT];
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uint16_t score = 0;
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uint8_t cleared[HEIGHT-1] = {0};
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void construct_shapes() {
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tetromino[0] = "..X."
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"..X."
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@ -68,7 +74,7 @@ void initialize_field() {
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}
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}
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uint8_t does_piece_fit(uint8_t shape, uint8_t rotation, uint8_t px, uint8_t py) {
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uint8_t does_piece_fit(uint8_t shape, uint8_t rotation, int8_t px, uint8_t py) {
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for (uint8_t y = 0; y < 4; ++y) {
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for (uint8_t x = 0; x < 4; ++x) {
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// Index in piece
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@ -91,21 +97,25 @@ uint8_t does_piece_fit(uint8_t shape, uint8_t rotation, uint8_t px, uint8_t py)
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return 1;
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}
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uint8_t next_shape = 0;
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uint8_t current_shape = 0;
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uint8_t current_rotation = 0;
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uint8_t current_x = WIDTH/2;
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int8_t current_x = WIDTH/2-2;
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uint8_t current_y = 0;
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void new_shape() {
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current_shape = next_shape;
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do {
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current_shape = random() & 0x07;
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} while (current_shape == 7);
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next_shape = random() & 0x07;
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} while (next_shape == 7);
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}
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void render() {
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// Copy current state of the field
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for (uint8_t i = 0; i < WIDTH*HEIGHT; ++i) {
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screen[i] = field[i];
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/* Copy current state of the field */
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for (uint8_t y = 0; y < HEIGHT; ++y) {
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for (uint8_t x = 0; x < WIDTH; ++x) {
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screen[y*WIDTH + x] = field[y*WIDTH + x];
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}
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}
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// Copy current piece to the screen
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@ -119,17 +129,18 @@ void render() {
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}
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__sfr __at (0x02) cout;
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void draw() {
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// Draw the screen
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put_string("\033[2;2H");
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for (uint8_t y = 0; y < HEIGHT*SCALE; ++y) {
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for (uint8_t x = 0; x < WIDTH*SCALE; ++x) {
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uint8_t i = screen[y/SCALE*WIDTH + x/SCALE];
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if (i >= 8) {
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void draw_part(uint8_t i) {
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if (i == 9) {
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cout = '\033';
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cout = '[';
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cout = '0';
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cout = 'm';
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} else if (i == 8) {
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cout = '\033';
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cout = '[';
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cout = '3';
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cout = '3';
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cout = 'm';
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} else if (i > 0) {
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cout = '\033';
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cout = '[';
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@ -137,8 +148,7 @@ void draw() {
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cout = 48+i;
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cout = 'm';
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}
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/* char c = " RGOBMCW=#"[i]; */
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/* cout = c; */
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switch (i) {
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case 0:
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cout = ' ';
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@ -157,21 +167,77 @@ void draw() {
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break;
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}
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}
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void draw() {
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// Move to the start of the field
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cout = '\033';
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cout = '[';
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cout = '2';
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cout = ';';
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cout = '2';
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cout = 'H';
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// Draw the screen
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for (uint8_t y = 0; y < HEIGHT; ++y) {
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for (uint8_t x = 0; x < WIDTH; ++x) {
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uint8_t i = screen[y*WIDTH + x];
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draw_part(i);
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}
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cout = '\n';
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cout = '\r';
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cout = ' ';
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}
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// Draw next part
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for (uint8_t y = 0; y < 4; ++y) {
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cout = '\033';
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cout = '[';
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cout = '3' + y;
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cout = ';';
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cout = '1';
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cout = '5';
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cout = 'H';
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for (uint8_t x = 0; x < 4; ++x) {
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if (tetromino[next_shape][rotate(x, y, 0)] == 'X') {
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draw_part(next_shape + 1);
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} else {
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draw_part(0);
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}
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}
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}
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cout = '\033';
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cout = '[';
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cout = '8';
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cout = ';';
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cout = '1';
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cout = '5';
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cout = 'H';
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// Print the score
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uint32_t r = uint16_to_bcd(score);
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for (uint8_t j = 0; j < 6; ++j) {
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cout = '0' + ((r >> (20 - j*4)) & 0xF);
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}
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cout = '\033';
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cout = '[';
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cout = '0';
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cout = 'm';
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}
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#define SPEED 2
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uint8_t counter = SPEED;
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__sfr __at (0x1F) status;
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__sfr __at (0x1E) key;
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__sfr __at (0xFF) debug;
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uint8_t loop() {
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// Check if a key has been pressed
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uint8_t bonus = 0;
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if (status & 1) {
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uint8_t nx = current_x;
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int8_t nx = current_x;
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uint8_t ny = current_y;
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uint8_t nr = current_rotation;
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// End program on ctrl-c
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@ -205,7 +271,10 @@ uint8_t loop() {
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// Drop the piece
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case 'w':
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while (does_piece_fit(current_shape, current_rotation, current_x, ++ny + 1));
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while (does_piece_fit(current_shape, current_rotation, current_x, ++ny + 1)) {
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bonus++;
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}
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counter = 0;
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break;
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}
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@ -221,6 +290,7 @@ uint8_t loop() {
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if (does_piece_fit(current_shape, current_rotation, current_x, current_y+1)) {
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current_y++;
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} else {
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uint8_t cc = 0;
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// Copy piece to field
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for (uint8_t y = 0; y < 4; ++y) {
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for (uint8_t x = 0; x < 4; ++x) {
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}
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}
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for (uint8_t y = 0; y < 4; ++y) {
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if (current_y + y < HEIGHT-1) {
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uint8_t line = 1;
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for (uint8_t x = 1; x < WIDTH-1; ++x) {
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if (field[(current_y+y)*WIDTH + x] == 0 || field[(current_y+y)*WIDTH + x] == 8) {
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line = 0;
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break;
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}
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}
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if (line) {
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for (uint8_t x = 1; x < WIDTH-1; ++x) {
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field[(current_y+y)*WIDTH + x] = 8;
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}
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cleared[current_y+y] = (SPEED >> 2) + cc + 1;
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cc++;
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}
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}
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}
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if (cc) {
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score += 10*cc*cc + bonus;
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}
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if (cc) {
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debug = (score >> 8) & 0xFF;
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debug = score & 0xFF;
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}
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new_shape();
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current_y = 0;
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current_x = WIDTH/2;
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current_x = WIDTH/2-2;
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current_rotation = 0;
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// Check if the next piece can spawn
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if (!does_piece_fit(current_shape, current_rotation, current_x, current_y)) {
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put_string("Game over!\n\r");
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return 0;
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}
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}
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counter = SPEED;
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}
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for (uint8_t iy = 0; iy < HEIGHT-1; ++iy) {
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if (cleared[iy]) {
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cleared[iy]--;
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if (!cleared[iy]) {
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for (uint8_t x = 1; x < WIDTH-1; ++x) {
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for (uint8_t y = iy; y > 0; --y) {
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field[y*WIDTH + x] = field[(y-1)*WIDTH + x];
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}
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}
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}
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}
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}
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counter--;
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render();
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return 1;
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}
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// We do not initialize this in order to get a random seed
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// We need to make sure that this ends up after most of the other things ram
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// Otherwise we run the risk of the value being loaded from disk
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// In which case it is no longer random
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uint8_t random_seed;
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void main() {
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// Set the seed based on a hardware random number
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random_set_seed(random_hw());
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construct_shapes();
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initialize_field();
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// Set initial shape
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new_shape();
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new_shape();
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// Clear the screen
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put_string("\033[2J");
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