├── .gitignore
├── animation.gif
├── Makefile
├── README.md
├── tinytetris.cpp
├── tinytetris-commented.cpp
└── LICENSE


/.gitignore:
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1 | tinytetris
2 | tinytetris-commented
3 | 


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/animation.gif:
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https://raw.githubusercontent.com/taylorconor/tinytetris/HEAD/animation.gif


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/Makefile:
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1 | LDFLAGS=-lcurses
2 | 
3 | all: tinytetris
4 | 
5 | clean:
6 | 	rm -f tinytetris tinytetris-commented
7 | 


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/README.md:
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 1 | # tinytetris
 2 | 80x23 terminal tetris!
 3 | 
 4 | ![tinytetris gif](animation.gif)
 5 | 
 6 | ### tinytetris.cpp
 7 | This is the 80x23 version. You control it with `a` (left), `d` (right), `w` (rotate),
 8 | `s` (drop), and `q` (quit). It depends on `curses.h` (so you'll need to compile with
 9 | `-lcurses`, and install curses if you don't already have it) and requires C++11.
10 | 
11 | ### tinytetris-commented.cpp
12 | This one is almost identical to `tinytetris.cpp`, but not minified, and with some
13 | comments to make it easier to read (but it's still tricky to read in certain parts).
14 | 
15 | ### build binary tinytetris-commented.cpp
16 | `g++ -o tinytetris-commented tinytetris-commented.cpp -lncurses`
17 | 


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/tinytetris.cpp:
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 1 | #include <ctime>    //   ████████  ██████  ████████  ████████  ██  ██████  ██
 2 | #include <curses.h> //      ██     ██         ██     ██    ██  ██  ██      ██
 3 | #include <stdlib.h> //      ██     ████       ██     ████████  ██  ██████  ██
 4 | #include <string.h> //      ██     ██         ██     ██  ██    ██      ██
 5 | #include <unistd.h> //      ██     ██████     ██     ██    ██  ██  ██████  ██
 6 | typedef int I;I x=431424,y=598356,r=427089,f=247872,g=799248,h,c=348480,p=615696
 7 | ,t,a[20][10],b[7][4]={{x,y,x,y},{r,p,r,p},{c,c,c,c},{599636,431376,598336,432192
 8 | },{411985,610832,415808,595540},{f,g,f,g},{614928,399424,615744,428369}},s=0;I N
 9 | (I x,I y){return 3&b[p][x]>>y;}I S(I x,I y,I r,I v){for(I i=0;i<8;i+=2)a[N(r,i*2
10 | )+y][N(r,(i*2)+2)+x]=v;}I F(){for(I c=0;c<20;c++){move(1+c,1);for(auto &z:a[c]){
11 | z&&attron(262176|z<<8);printw("  ");attroff(262176|z<<8);}}move(21,1);printw("S"
12 | "core: %d",s);refresh();}I P(){y=g=0;p=rand()%7;r=h=rand()%4;x=f=rand()%(10-N(r,
13 | 16));}I U(){S(f,g,h,0);S(f=x,g=y,h=r,p+1);}I R(){for(I q=y;q<=y+N(r,18);q++){c=1
14 | ;for(auto &z:a[q])c*=z;if(!c)continue;for(I c=q-1;c>0;c--)memcpy(&a[c+1][0],&a[c
15 | ][0],40);memset(&a[0][0],0,10);s++;}}I C(I x,I y,I r){if(y+N(r,18)>19)return 1;S
16 | (f,g,h,0);c=0;for(I i=0;i<8;i+=2)a[y+N(r,i*2)][x+N(r,(i*2)+2)]&&c++;S(f,g,h,p+1)
17 | ;return c;}I T(){if(++t>30){t=0;if(C(x,y+1,r)){if(!y)return 0;R();P();}else y++;
18 | U();}return 1;}I L(){while(T()){usleep(10000);if((c=getch())==97&&x>0&&!C(x-1,y,
19 | r))x--;if(c==100&&x+N(r,16)<9&&!C(x+1,y,r))x++;if(c==115){while(!C(x,y+1,r)){y++
20 | ;U();}R();P();}if(c==119){++r%=4;while(x+N(r,16)>9)x--;if(C(x,y,r)){x=f;r=h;}}if
21 | (c==113)return 0;U();F();}}I main(){srand(time(0));initscr();start_color();for(c
22 | =1;c<8;c++){init_pair(c,c,0);}P();resizeterm(22,22);noecho();timeout(0);curs_set
23 | (0);box(stdscr,0,0);L();endwin();} // Conor Taylor
24 | 


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/tinytetris-commented.cpp:
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  1 | #include <ctime>
  2 | #include <curses.h>
  3 | #include <unistd.h>
  4 | #include <stdlib.h>
  5 | #include <string.h>
  6 | 
  7 | // block layout is: {w-1,h-1}{x0,y0}{x1,y1}{x2,y2}{x3,y3} (two bits each)
  8 | int x = 431424, y = 598356, r = 427089, px = 247872, py = 799248, pr,
  9 |     c = 348480, p = 615696, tick, board[20][10],
 10 |     block[7][4] = {{x, y, x, y},
 11 |                    {r, p, r, p},
 12 |                    {c, c, c, c},
 13 |                    {599636, 431376, 598336, 432192},
 14 |                    {411985, 610832, 415808, 595540},
 15 |                    {px, py, px, py},
 16 |                    {614928, 399424, 615744, 428369}},
 17 |     score = 0;
 18 | 
 19 | // extract a 2-bit number from a block entry
 20 | int NUM(int x, int y) { return 3 & block[p][x] >> y; }
 21 | 
 22 | // create a new piece, don't remove old one (it has landed and should stick)
 23 | void new_piece() {
 24 |   y = py = 0;
 25 |   p = rand() % 7;
 26 |   r = pr = rand() % 4;
 27 |   x = px = rand() % (10 - NUM(r, 16));
 28 | }
 29 | 
 30 | // draw the board and score
 31 | void frame() {
 32 |   for (int i = 0; i < 20; i++) {
 33 |     move(1 + i, 1); // otherwise the box won't draw
 34 |     for (int j = 0; j < 10; j++) {
 35 |       board[i][j] && attron(262176 | board[i][j] << 8);
 36 |       printw("  ");
 37 |       attroff(262176 | board[i][j] << 8);
 38 |     }
 39 |   }
 40 |   move(21, 1);
 41 |   printw("Score: %d", score);
 42 |   refresh();
 43 | }
 44 | 
 45 | // set the value fo the board for a particular (x,y,r) piece
 46 | void set_piece(int x, int y, int r, int v) {
 47 |   for (int i = 0; i < 8; i += 2) {
 48 |     board[NUM(r, i * 2) + y][NUM(r, (i * 2) + 2) + x] = v;
 49 |   }
 50 | }
 51 | 
 52 | // move a piece from old (p*) coords to new
 53 | int update_piece() {
 54 |   set_piece(px, py, pr, 0);
 55 |   set_piece(px = x, py = y, pr = r, p + 1);
 56 | }
 57 | 
 58 | // remove line(s) from the board if they're full
 59 | void remove_line() {
 60 |   for (int row = y; row <= y + NUM(r, 18); row++) {
 61 |     c = 1;
 62 |     for (int i = 0; i < 10; i++) {
 63 |       c *= board[row][i];
 64 |     }
 65 |     if (!c) {
 66 |       continue;
 67 |     }
 68 |     for (int i = row - 1; i > 0; i--) {
 69 |       memcpy(&board[i + 1][0], &board[i][0], 40);
 70 |     }
 71 |     memset(&board[0][0], 0, 10);
 72 |     score++;
 73 |   }
 74 | }
 75 | 
 76 | // check if placing p at (x,y,r) will be a collision
 77 | int check_hit(int x, int y, int r) {
 78 |   if (y + NUM(r, 18) > 19) {
 79 |     return 1;
 80 |   }
 81 |   set_piece(px, py, pr, 0);
 82 |   c = 0;
 83 |   for (int i = 0; i < 8; i += 2) {
 84 |     board[y + NUM(r, i * 2)][x + NUM(r, (i * 2) + 2)] && c++;
 85 |   }
 86 |   set_piece(px, py, pr, p + 1);
 87 |   return c;
 88 | }
 89 | 
 90 | // slowly tick the piece y position down so the piece falls
 91 | int do_tick() {
 92 |   if (++tick > 30) {
 93 |     tick = 0;
 94 |     if (check_hit(x, y + 1, r)) {
 95 |       if (!y) {
 96 |         return 0;
 97 |       }
 98 |       remove_line();
 99 |       new_piece();
100 |     } else {
101 |       y++;
102 |       update_piece();
103 |     }
104 |   }
105 |   return 1;
106 | }
107 | 
108 | // main game loop with wasd input checking
109 | void runloop() {
110 |   while (do_tick()) {
111 |     usleep(10000);
112 |     if ((c = getch()) == 'a' && x > 0 && !check_hit(x - 1, y, r)) {
113 |       x--;
114 |     }
115 |     if (c == 'd' && x + NUM(r, 16) < 9 && !check_hit(x + 1, y, r)) {
116 |       x++;
117 |     }
118 |     if (c == 's') {
119 |       while (!check_hit(x, y + 1, r)) {
120 |         y++;
121 |         update_piece();
122 |       }
123 |       remove_line();
124 |       new_piece();
125 |     }
126 |     if (c == 'w') {
127 |       ++r %= 4;
128 |       while (x + NUM(r, 16) > 9) {
129 |         x--;
130 |       }
131 |       if (check_hit(x, y, r)) {
132 |         x = px;
133 |         r = pr;
134 |       }
135 |     }
136 |     if (c == 'q') {
137 |       return;
138 |     }
139 |     update_piece();
140 |     frame();
141 |   }
142 | }
143 | 
144 | // init curses and start runloop
145 | int main() {
146 |   srand(time(0));
147 |   initscr();
148 |   start_color();
149 |   // colours indexed by their position in the block
150 |   for (int i = 1; i < 8; i++) {
151 |     init_pair(i, i, 0);
152 |   }
153 |   new_piece();
154 |   resizeterm(22, 22);
155 |   noecho();
156 |   timeout(0);
157 |   curs_set(0);
158 |   box(stdscr, 0, 0);
159 |   runloop();
160 |   endwin();
161 | }
162 | 


--------------------------------------------------------------------------------
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