1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
|
#include <stdint.h>
#include <stdio.h>
#include <dos.h>
#include "keyb.h"
#include "vga.h"
#include "sound.h"
#include "text.h"
#include "map.h"
#include "data.h"
#include "timer.h"
#include "entities.h"
#include "tmonster.h"
#include "player.h"
#include "game.h"
#define GAME_LIVES_START 3
#define GAME_LIVES_MAX 9
#define GAME_TIME_MAX 60
#define GAME_MAX_PICKAXE 3
#define HUD_CLEAN 0
#define HUD_LIVES 1
#define HUD_SCORE 2
#define HUD_STAGE 4
#define HUD_TIME 8
#define HUD_PICKAXE 16
#define HUD_ALL 255
#define GAMEOVER_DELAY 96
#define STAGECLEAR_DELAY 96
static uint32_t hiscore = 15000;
static uint8_t hud;
static volatile uint8_t clock_updated;
/* game variables */
static uint8_t lives;
static uint32_t score;
static uint8_t stage;
static uint8_t time;
static uint8_t pickaxe;
static uint8_t stageclear;
static uint8_t gameover;
static uint8_t pause;
static Entity *tmonster;
static void hud_render()
{
char b[32];
if (hud & HUD_ALL)
{
Rect src = { 128, 32, 144, 144};
Rect dst = { 4, 0, 16, 16};
/* lives */
blitrc(binary_sprites_start, &src, &dst);
/* pickaxe */
src.x = 112;
dst.x = 90;
blitrc(binary_sprites_start, &src, &dst);
put_text(132, 4, "TIME", 1);
put_text(249, 4, "STAGE", 1);
}
if (hud & HUD_LIVES)
{
sprintf(b, "%d", lives);
put_text(18, 4, b, 1);
}
if (hud & HUD_SCORE)
{
sprintf(b, "%06li", score);
put_text(34, 4, b, 5);
}
if (hud & HUD_PICKAXE)
{
sprintf(b, "%d", pickaxe);
put_text(106, 4, b, 1);
}
if (hud & HUD_TIME)
{
sprintf(b, "%02d", time);
put_text(172, 4, b, time > 10 || stageclear ? 1 : 15);
if (!gameover && !stageclear && time <= 10)
sound_play_efx(EFX_TIME);
}
if (hud & HUD_STAGE)
{
sprintf(b, "%02d", stage + 1);
put_text(297, 4, b, 1);
}
hud = HUD_CLEAN;
}
static void run_gameover()
{
wait_vsync();
blit_erase(0);
/* restore the HUD after erasing the screen */
hud = HUD_ALL;
hud_render();
put_text(124, 90, "GAME OVER", 1);
/* wait some time */
wait_frames(255);
}
static void run_stageclear()
{
wait_vsync();
put_text(116, 100, "STAGE CLEAR", 1);
/* wait some time */
wait_frames(96);
while (time)
{
add_score(25);
time--;
hud |= HUD_TIME;
wait_frames(4);
wait_vsync();
hud_render();
sound_play_efx(EFX_GOLD);
}
/* wait some time */
wait_frames(64);
wait_vsync();
blit_erase(0);
/* restore the HUD after erasing the screen */
hud = HUD_ALL;
wait_vsync();
hud_render();
wait_frames(32);
}
void run_game()
{
lives = GAME_LIVES_START;
score = 0;
stage = 0;
next_stage:
pause = 0;
gameover = 0;
stageclear = 0;
pickaxe = 0;
time = GAME_TIME_MAX;
hud = HUD_ALL;
tmonster = NULL;
blit_target(TARGET_BUFFER);
blit_erase(0);
map_init(binary_stage_start);
map_render();
hud_render();
wait_vsync();
blit_copy_all();
blit_target(TARGET_SCREEN);
put_text(136, 100, "READY?", 1);
entities_draw();
player_draw();
/* wait some time */
wait_frames(96);
/* erase the READY? text */
wait_vsync();
blit_copy_all();
entities_draw();
player_draw();
timer_start(GAME_TIME_MAX, &clock_updated);
while (!keys[KEY_ESC])
{
if (clock_updated)
{
time = timer_value();
hud |= HUD_TIME;
}
if (hud)
hud_render();
if (keys[KEY_P])
{
/* pause / resume */
pause ^= 1;
/* wait for the key to be released */
while (keys[KEY_P])
wait_vsync();
if (pause)
timer_stop();
else
timer_resume();
}
if (pause)
continue;
if (map_is_complete())
{
if (!stageclear)
{
timer_stop();
tmonster = NULL;
entities_warp_out_all();
sound_play_efx(EFX_WARP);
stageclear = STAGECLEAR_DELAY;
}
else
{
stageclear--;
if (stageclear == 1)
{
run_stageclear();
goto next_stage;
}
}
}
else
{
player_update();
/* time monster */
if (!time && !tmonster)
{
tmonster = entities_new();
if (tmonster)
tmonster_init(tmonster);
}
if (time && tmonster)
{
tmonster->used = 0;
tmonster = NULL;
}
}
entities_update();
wait_vsync();
/* prevent interrupts so updating the audio doesn't result in sprite
* flickering on the less powered machines */
disable();
player_erase();
entities_draw();
player_draw();
enable();
if (gameover)
{
gameover--;
if (gameover == 1)
{
run_gameover();
break;
}
}
}
/* wait for ESC to be release */
while (keys[KEY_ESC])
wait_vsync();
}
void add_score(uint8_t v)
{
score += v;
hud |= HUD_SCORE;
}
uint32_t get_hiscore()
{
return hiscore;
}
uint8_t dec_lives()
{
lives--;
if (lives == 0)
{
gameover = GAMEOVER_DELAY;
timer_stop();
}
hud |= HUD_LIVES;
return lives;
}
void reset_time()
{
time = GAME_TIME_MAX;
hud |= HUD_TIME;
timer_start(GAME_TIME_MAX, &clock_updated);
}
void add_pickaxe()
{
if (pickaxe < GAME_MAX_PICKAXE)
{
pickaxe++;
hud |= HUD_PICKAXE;
}
}
uint8_t use_pickaxe()
{
if (pickaxe)
{
pickaxe--;
hud |= HUD_PICKAXE;
return 1;
}
return 0;
}
|
