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6e44da43 | 1 | ;;; tetris.el --- implementation of Tetris for Emacs |
3d4ae13e RS |
2 | |
3 | ;; Copyright (C) 1997 Free Software Foundation, Inc. | |
4 | ||
5 | ;; Author: Glynn Clements <glynn@sensei.co.uk> | |
6 | ;; Version: 2.01 | |
7 | ;; Created: 1997-08-13 | |
8 | ;; Keywords: games | |
9 | ||
10 | ;; This file is part of GNU Emacs. | |
11 | ||
12 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
13 | ;; it under the terms of the GNU General Public License as published by | |
14 | ;; the Free Software Foundation; either version 2, or (at your option) | |
15 | ;; any later version. | |
16 | ||
17 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;; GNU General Public License for more details. | |
21 | ||
22 | ;; You should have received a copy of the GNU General Public License | |
23 | ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
24 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
25 | ;; Boston, MA 02111-1307, USA. | |
26 | ||
27 | ;;; Commentary: | |
28 | ||
6e44da43 PJ |
29 | ;;; Code: |
30 | ||
3d4ae13e RS |
31 | (eval-when-compile |
32 | (require 'cl)) | |
33 | ||
34 | (require 'gamegrid) | |
35 | ||
36 | ;; ;;;;;;;;;;;;; customization variables ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
37 | ||
67ec1c1a RS |
38 | (defgroup tetris nil |
39 | "Play a game of tetris." | |
40 | :prefix "tetris-" | |
41 | :group 'games) | |
42 | ||
43 | (defcustom tetris-use-glyphs t | |
44 | "*Non-nil means use glyphs when available." | |
45 | :group 'tetris | |
46 | :type 'boolean) | |
47 | ||
48 | (defcustom tetris-use-color t | |
49 | "*Non-nil means use color when available." | |
50 | :group 'tetris | |
51 | :type 'boolean) | |
52 | ||
53 | (defcustom tetris-draw-border-with-glyphs t | |
54 | "*Non-nil means draw a border even when using glyphs." | |
55 | :group 'tetris | |
56 | :type 'boolean) | |
57 | ||
58 | (defcustom tetris-default-tick-period 0.3 | |
59 | "*The default time taken for a shape to drop one row." | |
60 | :group 'tetris | |
61 | :type 'number) | |
62 | ||
63 | (defcustom tetris-update-speed-function | |
3d4ae13e RS |
64 | 'tetris-default-update-speed-function |
65 | "Function run whenever the Tetris score changes | |
66 | Called with two arguments: (SHAPES ROWS) | |
67 | SHAPES is the number of shapes which have been dropped | |
68 | ROWS is the number of rows which have been completed | |
69 | ||
67ec1c1a RS |
70 | If the return value is a number, it is used as the timer period." |
71 | :group 'tetris | |
72 | :type 'function) | |
3d4ae13e | 73 | |
67ec1c1a RS |
74 | (defcustom tetris-mode-hook nil |
75 | "Hook run upon starting Tetris." | |
76 | :group 'tetris | |
77 | :type 'hook) | |
3d4ae13e | 78 | |
67ec1c1a | 79 | (defcustom tetris-tty-colors |
3d4ae13e RS |
80 | [nil "blue" "white" "yellow" "magenta" "cyan" "green" "red"] |
81 | "Vector of colors of the various shapes in text mode | |
67ec1c1a RS |
82 | Element 0 is ignored." |
83 | :group 'tetris | |
84 | :type (let ((names `("Shape 1" "Shape 2" "Shape 3" | |
85 | "Shape 4" "Shape 5" "Shape 6" "Shape 7")) | |
86 | (result `(vector (const nil)))) | |
87 | (while names | |
adcce7d5 SS |
88 | (add-to-list 'result |
89 | (cons 'choice | |
90 | (cons :tag | |
91 | (cons (car names) | |
67ec1c1a RS |
92 | (mapcar (lambda (color) |
93 | (list 'const color)) | |
94 | (defined-colors))))) | |
95 | t) | |
96 | (setq names (cdr names))) | |
97 | result)) | |
98 | ||
99 | (defcustom tetris-x-colors | |
3d4ae13e RS |
100 | [nil [0 0 1] [0.7 0 1] [1 1 0] [1 0 1] [0 1 1] [0 1 0] [1 0 0]] |
101 | "Vector of colors of the various shapes | |
67ec1c1a RS |
102 | Element 0 is ignored." |
103 | :group 'tetris | |
104 | :type 'sexp) | |
105 | ||
106 | (defcustom tetris-buffer-name "*Tetris*" | |
107 | "Name used for Tetris buffer." | |
108 | :group 'tetris | |
109 | :type 'string) | |
110 | ||
111 | (defcustom tetris-buffer-width 30 | |
112 | "Width of used portion of buffer." | |
113 | :group 'tetris | |
114 | :type 'number) | |
115 | ||
116 | (defcustom tetris-buffer-height 22 | |
117 | "Height of used portion of buffer." | |
118 | :group 'tetris | |
119 | :type 'number) | |
120 | ||
121 | (defcustom tetris-width 10 | |
122 | "Width of playing area." | |
123 | :group 'tetris | |
124 | :type 'number) | |
125 | ||
126 | (defcustom tetris-height 20 | |
127 | "Height of playing area." | |
128 | :group 'tetris | |
129 | :type 'number) | |
130 | ||
131 | (defcustom tetris-top-left-x 3 | |
132 | "X position of top left of playing area." | |
133 | :group 'tetris | |
134 | :type 'number) | |
135 | ||
136 | (defcustom tetris-top-left-y 1 | |
137 | "Y position of top left of playing area." | |
138 | :group 'tetris | |
139 | :type 'number) | |
3d4ae13e RS |
140 | |
141 | (defvar tetris-next-x (+ (* 2 tetris-top-left-x) tetris-width) | |
142 | "X position of next shape.") | |
143 | ||
144 | (defvar tetris-next-y tetris-top-left-y | |
145 | "Y position of next shape.") | |
146 | ||
147 | (defvar tetris-score-x tetris-next-x | |
148 | "X position of score.") | |
149 | ||
150 | (defvar tetris-score-y (+ tetris-next-y 6) | |
151 | "Y position of score.") | |
152 | ||
9caf26fe | 153 | ;; It is not safe to put this in /tmp. |
adcce7d5 | 154 | ;; Someone could make a symlink in /tmp |
9caf26fe | 155 | ;; pointing to a file you don't want to clobber. |
76f1b321 | 156 | (defvar tetris-score-file "tetris-scores" |
3d4ae13e RS |
157 | ;; anybody with a well-connected server want to host this? |
158 | ;(defvar tetris-score-file "/anonymous@ftp.pgt.com:/pub/cgw/tetris-scores" | |
159 | "File for holding high scores.") | |
160 | ||
161 | ;; ;;;;;;;;;;;;; display options ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
162 | ||
3d4ae13e RS |
163 | (defvar tetris-blank-options |
164 | '(((glyph colorize) | |
165 | (t ?\040)) | |
166 | ((color-x color-x) | |
167 | (mono-x grid-x) | |
ba8cb9c5 | 168 | (color-tty color-tty)) |
3d4ae13e | 169 | (((glyph color-x) [0 0 0]) |
ba8cb9c5 | 170 | (color-tty "black")))) |
3d4ae13e RS |
171 | |
172 | (defvar tetris-cell-options | |
173 | '(((glyph colorize) | |
174 | (emacs-tty ?O) | |
175 | (t ?\040)) | |
176 | ((color-x color-x) | |
177 | (mono-x mono-x) | |
178 | (color-tty color-tty) | |
ba8cb9c5 | 179 | (mono-tty mono-tty)) |
3d4ae13e RS |
180 | ;; color information is taken from tetris-x-colors and tetris-tty-colors |
181 | )) | |
182 | ||
ba8cb9c5 FP |
183 | (defvar tetris-border-options |
184 | '(((glyph colorize) | |
185 | (t ?\+)) | |
186 | ((color-x color-x) | |
187 | (mono-x grid-x) | |
188 | (color-tty color-tty)) | |
189 | (((glyph color-x) [0.5 0.5 0.5]) | |
190 | (color-tty "white")))) | |
191 | ||
3d4ae13e RS |
192 | (defvar tetris-space-options |
193 | '(((t ?\040)) | |
194 | nil | |
195 | nil)) | |
196 | ||
197 | ;; ;;;;;;;;;;;;; constants ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
198 | ||
199 | (defconst tetris-shapes | |
200 | [[[[1 1 0 0] [1 1 0 0] [1 1 0 0] [1 1 0 0]] | |
201 | [[1 1 0 0] [1 1 0 0] [1 1 0 0] [1 1 0 0]] | |
202 | [[0 0 0 0] [0 0 0 0] [0 0 0 0] [0 0 0 0]] | |
203 | [[0 0 0 0] [0 0 0 0] [0 0 0 0] [0 0 0 0]]] | |
204 | ||
205 | [[[2 2 2 0] [0 2 0 0] [2 0 0 0] [2 2 0 0]] | |
206 | [[0 0 2 0] [0 2 0 0] [2 2 2 0] [2 0 0 0]] | |
207 | [[0 0 0 0] [2 2 0 0] [0 0 0 0] [2 0 0 0]] | |
208 | [[0 0 0 0] [0 0 0 0] [0 0 0 0] [0 0 0 0]]] | |
209 | ||
210 | [[[3 3 3 0] [3 3 0 0] [0 0 3 0] [3 0 0 0]] | |
211 | [[3 0 0 0] [0 3 0 0] [3 3 3 0] [3 0 0 0]] | |
212 | [[0 0 0 0] [0 3 0 0] [0 0 0 0] [3 3 0 0]] | |
213 | [[0 0 0 0] [0 0 0 0] [0 0 0 0] [0 0 0 0]]] | |
214 | ||
215 | [[[4 4 0 0] [0 4 0 0] [4 4 0 0] [0 4 0 0]] | |
216 | [[0 4 4 0] [4 4 0 0] [0 4 4 0] [4 4 0 0]] | |
217 | [[0 0 0 0] [4 0 0 0] [0 0 0 0] [4 0 0 0]] | |
218 | [[0 0 0 0] [0 0 0 0] [0 0 0 0] [0 0 0 0]]] | |
219 | ||
220 | [[[0 5 5 0] [5 0 0 0] [0 5 5 0] [5 0 0 0]] | |
221 | [[5 5 0 0] [5 5 0 0] [5 5 0 0] [5 5 0 0]] | |
222 | [[0 0 0 0] [0 5 0 0] [0 0 0 0] [0 5 0 0]] | |
223 | [[0 0 0 0] [0 0 0 0] [0 0 0 0] [0 0 0 0]]] | |
224 | ||
225 | [[[0 6 0 0] [6 0 0 0] [6 6 6 0] [0 6 0 0]] | |
226 | [[6 6 6 0] [6 6 0 0] [0 6 0 0] [6 6 0 0]] | |
227 | [[0 0 0 0] [6 0 0 0] [0 0 0 0] [0 6 0 0]] | |
228 | [[0 0 0 0] [0 0 0 0] [0 0 0 0] [0 0 0 0]]] | |
229 | ||
230 | [[[7 7 7 7] [7 0 0 0] [7 7 7 7] [7 0 0 0]] | |
231 | [[0 0 0 0] [7 0 0 0] [0 0 0 0] [7 0 0 0]] | |
232 | [[0 0 0 0] [7 0 0 0] [0 0 0 0] [7 0 0 0]] | |
233 | [[0 0 0 0] [7 0 0 0] [0 0 0 0] [7 0 0 0]]]]) | |
234 | ||
adcce7d5 | 235 | ;;the scoring rules were taken from "xtetris". Blocks score differently |
3d4ae13e RS |
236 | ;;depending on their rotation |
237 | ||
adcce7d5 | 238 | (defconst tetris-shape-scores |
3d4ae13e RS |
239 | [ [6 6 6 6] [6 7 6 7] [6 7 6 7] [6 7 6 7] [6 7 6 7] [5 5 6 5] [5 8 5 8]] ) |
240 | ||
241 | (defconst tetris-shape-dimensions | |
242 | [[2 2] [3 2] [3 2] [3 2] [3 2] [3 2] [4 1]]) | |
243 | ||
244 | (defconst tetris-blank 0) | |
245 | ||
246 | (defconst tetris-border 8) | |
247 | ||
248 | (defconst tetris-space 9) | |
249 | ||
250 | (defun tetris-default-update-speed-function (shapes rows) | |
251 | (/ 20.0 (+ 50.0 rows))) | |
252 | ||
253 | ;; ;;;;;;;;;;;;; variables ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
254 | ||
255 | (defvar tetris-shape 0) | |
256 | (defvar tetris-rot 0) | |
257 | (defvar tetris-next-shape 0) | |
258 | (defvar tetris-n-shapes 0) | |
259 | (defvar tetris-n-rows 0) | |
260 | (defvar tetris-score 0) | |
261 | (defvar tetris-pos-x 0) | |
262 | (defvar tetris-pos-y 0) | |
263 | (defvar tetris-paused nil) | |
264 | ||
265 | (make-variable-buffer-local 'tetris-shape) | |
266 | (make-variable-buffer-local 'tetris-rot) | |
267 | (make-variable-buffer-local 'tetris-next-shape) | |
268 | (make-variable-buffer-local 'tetris-n-shapes) | |
269 | (make-variable-buffer-local 'tetris-n-rows) | |
270 | (make-variable-buffer-local 'tetris-score) | |
271 | (make-variable-buffer-local 'tetris-pos-x) | |
272 | (make-variable-buffer-local 'tetris-pos-y) | |
273 | (make-variable-buffer-local 'tetris-paused) | |
274 | ||
275 | ;; ;;;;;;;;;;;;; keymaps ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
276 | ||
277 | (defvar tetris-mode-map | |
278 | (make-sparse-keymap 'tetris-mode-map)) | |
279 | ||
280 | (define-key tetris-mode-map "n" 'tetris-start-game) | |
281 | (define-key tetris-mode-map "q" 'tetris-end-game) | |
282 | (define-key tetris-mode-map "p" 'tetris-pause-game) | |
283 | ||
284 | (define-key tetris-mode-map " " 'tetris-move-bottom) | |
285 | (define-key tetris-mode-map [left] 'tetris-move-left) | |
286 | (define-key tetris-mode-map [right] 'tetris-move-right) | |
287 | (define-key tetris-mode-map [up] 'tetris-rotate-prev) | |
288 | (define-key tetris-mode-map [down] 'tetris-rotate-next) | |
289 | ||
290 | (defvar tetris-null-map | |
291 | (make-sparse-keymap 'tetris-null-map)) | |
292 | ||
293 | (define-key tetris-null-map "n" 'tetris-start-game) | |
294 | ||
295 | ;; ;;;;;;;;;;;;;;;; game functions ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
296 | ||
297 | (defun tetris-display-options () | |
298 | (let ((options (make-vector 256 nil))) | |
299 | (loop for c from 0 to 255 do | |
300 | (aset options c | |
301 | (cond ((= c tetris-blank) | |
302 | tetris-blank-options) | |
303 | ((and (>= c 1) (<= c 7)) | |
304 | (append | |
305 | tetris-cell-options | |
306 | `((((glyph color-x) ,(aref tetris-x-colors c)) | |
307 | (color-tty ,(aref tetris-tty-colors c)) | |
308 | (t nil))))) | |
309 | ((= c tetris-border) | |
310 | tetris-border-options) | |
311 | ((= c tetris-space) | |
312 | tetris-space-options) | |
313 | (t | |
314 | '(nil nil nil))))) | |
315 | options)) | |
316 | ||
317 | (defun tetris-get-tick-period () | |
318 | (if (boundp 'tetris-update-speed-function) | |
319 | (let ((period (apply tetris-update-speed-function | |
320 | tetris-n-shapes | |
321 | tetris-n-rows nil))) | |
322 | (and (numberp period) period)))) | |
323 | ||
324 | (defun tetris-get-shape-cell (x y) | |
325 | (aref (aref (aref (aref tetris-shapes | |
326 | tetris-shape) | |
327 | y) | |
328 | tetris-rot) | |
329 | x)) | |
330 | ||
331 | (defun tetris-shape-width () | |
332 | (aref (aref tetris-shape-dimensions tetris-shape) | |
333 | (% tetris-rot 2))) | |
334 | ||
335 | (defun tetris-shape-height () | |
336 | (aref (aref tetris-shape-dimensions tetris-shape) | |
337 | (- 1 (% tetris-rot 2)))) | |
338 | ||
339 | (defun tetris-draw-score () | |
340 | (let ((strings (vector (format "Shapes: %05d" tetris-n-shapes) | |
341 | (format "Rows: %05d" tetris-n-rows) | |
342 | (format "Score: %05d" tetris-score)))) | |
343 | (loop for y from 0 to 2 do | |
344 | (let* ((string (aref strings y)) | |
345 | (len (length string))) | |
346 | (loop for x from 0 to (1- len) do | |
347 | (gamegrid-set-cell (+ tetris-score-x x) | |
348 | (+ tetris-score-y y) | |
349 | (aref string x))))))) | |
350 | ||
351 | (defun tetris-update-score () | |
352 | (tetris-draw-score) | |
353 | (let ((period (tetris-get-tick-period))) | |
354 | (if period (gamegrid-set-timer period)))) | |
355 | ||
356 | (defun tetris-new-shape () | |
357 | (setq tetris-shape tetris-next-shape) | |
358 | (setq tetris-rot 0) | |
359 | (setq tetris-next-shape (random 7)) | |
360 | (setq tetris-pos-x (/ (- tetris-width (tetris-shape-width)) 2)) | |
361 | (setq tetris-pos-y 0) | |
362 | (if (tetris-test-shape) | |
363 | (tetris-end-game) | |
364 | (tetris-draw-shape)) | |
365 | (tetris-draw-next-shape) | |
366 | (tetris-update-score)) | |
367 | ||
368 | (defun tetris-draw-next-shape () | |
369 | (loop for y from 0 to 3 do | |
370 | (loop for x from 0 to 3 do | |
371 | (gamegrid-set-cell (+ tetris-next-x x) | |
372 | (+ tetris-next-y y) | |
373 | (let ((tetris-shape tetris-next-shape) | |
374 | (tetris-rot 0)) | |
375 | (tetris-get-shape-cell x y)))))) | |
376 | ||
377 | (defun tetris-draw-shape () | |
378 | (loop for y from 0 to (1- (tetris-shape-height)) do | |
379 | (loop for x from 0 to (1- (tetris-shape-width)) do | |
380 | (let ((c (tetris-get-shape-cell x y))) | |
381 | (if (/= c tetris-blank) | |
382 | (gamegrid-set-cell (+ tetris-top-left-x | |
383 | tetris-pos-x | |
384 | x) | |
385 | (+ tetris-top-left-y | |
386 | tetris-pos-y | |
387 | y) | |
388 | c)))))) | |
389 | ||
390 | (defun tetris-erase-shape () | |
391 | (loop for y from 0 to (1- (tetris-shape-height)) do | |
392 | (loop for x from 0 to (1- (tetris-shape-width)) do | |
393 | (let ((c (tetris-get-shape-cell x y)) | |
394 | (px (+ tetris-top-left-x tetris-pos-x x)) | |
395 | (py (+ tetris-top-left-y tetris-pos-y y))) | |
396 | (if (/= c tetris-blank) | |
397 | (gamegrid-set-cell px py tetris-blank)))))) | |
398 | ||
399 | (defun tetris-test-shape () | |
400 | (let ((hit nil)) | |
401 | (loop for y from 0 to (1- (tetris-shape-height)) do | |
402 | (loop for x from 0 to (1- (tetris-shape-width)) do | |
403 | (unless hit | |
404 | (setq hit | |
405 | (let* ((c (tetris-get-shape-cell x y)) | |
406 | (xx (+ tetris-pos-x x)) | |
407 | (yy (+ tetris-pos-y y)) | |
408 | (px (+ tetris-top-left-x xx)) | |
409 | (py (+ tetris-top-left-y yy))) | |
410 | (and (/= c tetris-blank) | |
411 | (or (>= xx tetris-width) | |
412 | (>= yy tetris-height) | |
413 | (/= (gamegrid-get-cell px py) | |
414 | tetris-blank)))))))) | |
415 | hit)) | |
416 | ||
417 | (defun tetris-full-row (y) | |
418 | (let ((full t)) | |
419 | (loop for x from 0 to (1- tetris-width) do | |
420 | (if (= (gamegrid-get-cell (+ tetris-top-left-x x) | |
421 | (+ tetris-top-left-y y)) | |
422 | tetris-blank) | |
423 | (setq full nil))) | |
424 | full)) | |
425 | ||
426 | (defun tetris-shift-row (y) | |
427 | (if (= y 0) | |
428 | (loop for x from 0 to (1- tetris-width) do | |
429 | (gamegrid-set-cell (+ tetris-top-left-x x) | |
430 | (+ tetris-top-left-y y) | |
431 | tetris-blank)) | |
432 | (loop for x from 0 to (1- tetris-width) do | |
433 | (let ((c (gamegrid-get-cell (+ tetris-top-left-x x) | |
434 | (+ tetris-top-left-y y -1)))) | |
435 | (gamegrid-set-cell (+ tetris-top-left-x x) | |
436 | (+ tetris-top-left-y y) | |
437 | c))))) | |
438 | ||
439 | (defun tetris-shift-down () | |
440 | (loop for y0 from 0 to (1- tetris-height) do | |
441 | (if (tetris-full-row y0) | |
442 | (progn (setq tetris-n-rows (1+ tetris-n-rows)) | |
443 | (loop for y from y0 downto 0 do | |
444 | (tetris-shift-row y)))))) | |
445 | ||
446 | (defun tetris-draw-border-p () | |
447 | (or (not (eq gamegrid-display-mode 'glyph)) | |
448 | tetris-draw-border-with-glyphs)) | |
449 | ||
450 | (defun tetris-init-buffer () | |
451 | (gamegrid-init-buffer tetris-buffer-width | |
452 | tetris-buffer-height | |
453 | tetris-space) | |
454 | (let ((buffer-read-only nil)) | |
455 | (if (tetris-draw-border-p) | |
456 | (loop for y from -1 to tetris-height do | |
457 | (loop for x from -1 to tetris-width do | |
458 | (gamegrid-set-cell (+ tetris-top-left-x x) | |
459 | (+ tetris-top-left-y y) | |
460 | tetris-border)))) | |
461 | (loop for y from 0 to (1- tetris-height) do | |
462 | (loop for x from 0 to (1- tetris-width) do | |
463 | (gamegrid-set-cell (+ tetris-top-left-x x) | |
464 | (+ tetris-top-left-y y) | |
465 | tetris-blank))) | |
466 | (if (tetris-draw-border-p) | |
467 | (loop for y from -1 to 4 do | |
468 | (loop for x from -1 to 4 do | |
469 | (gamegrid-set-cell (+ tetris-next-x x) | |
470 | (+ tetris-next-y y) | |
471 | tetris-border)))))) | |
472 | ||
473 | (defun tetris-reset-game () | |
474 | (gamegrid-kill-timer) | |
475 | (tetris-init-buffer) | |
476 | (setq tetris-next-shape (random 7)) | |
477 | (setq tetris-shape 0 | |
478 | tetris-rot 0 | |
479 | tetris-pos-x 0 | |
480 | tetris-pos-y 0 | |
481 | tetris-n-shapes 0 | |
482 | tetris-n-rows 0 | |
483 | tetris-score 0 | |
484 | tetris-paused nil) | |
485 | (tetris-new-shape)) | |
486 | ||
487 | (defun tetris-shape-done () | |
488 | (tetris-shift-down) | |
489 | (setq tetris-n-shapes (1+ tetris-n-shapes)) | |
490 | (setq tetris-score | |
adcce7d5 | 491 | (+ tetris-score |
3d4ae13e RS |
492 | (aref (aref tetris-shape-scores tetris-shape) tetris-rot))) |
493 | (tetris-update-score) | |
494 | (tetris-new-shape)) | |
495 | ||
496 | (defun tetris-update-game (tetris-buffer) | |
497 | "Called on each clock tick. | |
498 | Drops the shape one square, testing for collision." | |
499 | (if (and (not tetris-paused) | |
500 | (eq (current-buffer) tetris-buffer)) | |
501 | (let (hit) | |
502 | (tetris-erase-shape) | |
503 | (setq tetris-pos-y (1+ tetris-pos-y)) | |
504 | (setq hit (tetris-test-shape)) | |
505 | (if hit | |
506 | (setq tetris-pos-y (1- tetris-pos-y))) | |
507 | (tetris-draw-shape) | |
508 | (if hit | |
509 | (tetris-shape-done))))) | |
510 | ||
511 | (defun tetris-move-bottom () | |
512 | "Drops the shape to the bottom of the playing area" | |
513 | (interactive) | |
514 | (let ((hit nil)) | |
515 | (tetris-erase-shape) | |
516 | (while (not hit) | |
517 | (setq tetris-pos-y (1+ tetris-pos-y)) | |
518 | (setq hit (tetris-test-shape))) | |
519 | (setq tetris-pos-y (1- tetris-pos-y)) | |
520 | (tetris-draw-shape) | |
521 | (tetris-shape-done))) | |
522 | ||
523 | (defun tetris-move-left () | |
524 | "Moves the shape one square to the left" | |
525 | (interactive) | |
526 | (unless (= tetris-pos-x 0) | |
527 | (tetris-erase-shape) | |
528 | (setq tetris-pos-x (1- tetris-pos-x)) | |
529 | (if (tetris-test-shape) | |
530 | (setq tetris-pos-x (1+ tetris-pos-x))) | |
531 | (tetris-draw-shape))) | |
532 | ||
533 | (defun tetris-move-right () | |
534 | "Moves the shape one square to the right" | |
535 | (interactive) | |
536 | (unless (= (+ tetris-pos-x (tetris-shape-width)) | |
537 | tetris-width) | |
538 | (tetris-erase-shape) | |
539 | (setq tetris-pos-x (1+ tetris-pos-x)) | |
540 | (if (tetris-test-shape) | |
541 | (setq tetris-pos-x (1- tetris-pos-x))) | |
542 | (tetris-draw-shape))) | |
543 | ||
544 | (defun tetris-rotate-prev () | |
545 | "Rotates the shape clockwise" | |
546 | (interactive) | |
547 | (tetris-erase-shape) | |
548 | (setq tetris-rot (% (+ 1 tetris-rot) 4)) | |
549 | (if (tetris-test-shape) | |
550 | (setq tetris-rot (% (+ 3 tetris-rot) 4))) | |
551 | (tetris-draw-shape)) | |
552 | ||
553 | (defun tetris-rotate-next () | |
554 | "Rotates the shape anticlockwise" | |
555 | (interactive) | |
556 | (tetris-erase-shape) | |
557 | (setq tetris-rot (% (+ 3 tetris-rot) 4)) | |
558 | (if (tetris-test-shape) | |
559 | (setq tetris-rot (% (+ 1 tetris-rot) 4))) | |
560 | (tetris-draw-shape)) | |
561 | ||
562 | (defun tetris-end-game () | |
563 | "Terminates the current game" | |
564 | (interactive) | |
565 | (gamegrid-kill-timer) | |
566 | (use-local-map tetris-null-map) | |
567 | (gamegrid-add-score tetris-score-file tetris-score)) | |
568 | ||
569 | (defun tetris-start-game () | |
570 | "Starts a new game of Tetris" | |
571 | (interactive) | |
572 | (tetris-reset-game) | |
573 | (use-local-map tetris-mode-map) | |
574 | (let ((period (or (tetris-get-tick-period) | |
575 | tetris-default-tick-period))) | |
576 | (gamegrid-start-timer period 'tetris-update-game))) | |
577 | ||
578 | (defun tetris-pause-game () | |
579 | "Pauses (or resumes) the current game" | |
580 | (interactive) | |
581 | (setq tetris-paused (not tetris-paused)) | |
582 | (message (and tetris-paused "Game paused (press p to resume)"))) | |
583 | ||
584 | (defun tetris-active-p () | |
585 | (eq (current-local-map) tetris-mode-map)) | |
586 | ||
587 | (put 'tetris-mode 'mode-class 'special) | |
588 | ||
589 | (defun tetris-mode () | |
590 | "A mode for playing Tetris. | |
591 | ||
592 | tetris-mode keybindings: | |
593 | \\{tetris-mode-map} | |
594 | " | |
595 | (kill-all-local-variables) | |
596 | ||
3d4ae13e RS |
597 | (add-hook 'kill-buffer-hook 'gamegrid-kill-timer nil t) |
598 | ||
599 | (use-local-map tetris-null-map) | |
600 | ||
601 | (setq major-mode 'tetris-mode) | |
602 | (setq mode-name "Tetris") | |
603 | ||
604 | (setq mode-popup-menu | |
605 | '("Tetris Commands" | |
606 | ["Start new game" tetris-start-game] | |
607 | ["End game" tetris-end-game | |
608 | (tetris-active-p)] | |
609 | ["Pause" tetris-pause-game | |
610 | (and (tetris-active-p) (not tetris-paused))] | |
611 | ["Resume" tetris-pause-game | |
612 | (and (tetris-active-p) tetris-paused)])) | |
613 | ||
614 | (setq gamegrid-use-glyphs tetris-use-glyphs) | |
615 | (setq gamegrid-use-color tetris-use-color) | |
616 | ||
617 | (gamegrid-init (tetris-display-options)) | |
618 | ||
619 | (run-hooks 'tetris-mode-hook)) | |
620 | ||
621 | ;;;###autoload | |
622 | (defun tetris () | |
623 | "Play the Tetris game. | |
624 | Shapes drop from the top of the screen, and the user has to move and | |
625 | rotate the shape to fit in with those at the bottom of the screen so | |
626 | as to form complete rows. | |
627 | ||
628 | tetris-mode keybindings: | |
629 | \\<tetris-mode-map> | |
630 | \\[tetris-start-game] Starts a new game of Tetris | |
631 | \\[tetris-end-game] Terminates the current game | |
632 | \\[tetris-pause-game] Pauses (or resumes) the current game | |
633 | \\[tetris-move-left] Moves the shape one square to the left | |
634 | \\[tetris-move-right] Moves the shape one square to the right | |
635 | \\[tetris-rotate-prev] Rotates the shape clockwise | |
636 | \\[tetris-rotate-next] Rotates the shape anticlockwise | |
637 | \\[tetris-move-bottom] Drops the shape to the bottom of the playing area | |
638 | ||
639 | " | |
640 | (interactive) | |
641 | ||
642 | (switch-to-buffer tetris-buffer-name) | |
643 | (gamegrid-kill-timer) | |
644 | (tetris-mode) | |
645 | (tetris-start-game)) | |
646 | ||
647 | (provide 'tetris) | |
648 | ||
6b61353c | 649 | ;;; arch-tag: fb780d53-3ff0-49f0-8e19-f7f13cf2d49e |
3d4ae13e | 650 | ;;; tetris.el ends here |