deepstone: 17a5107b6fa4 src/main.c

deepstone

view src/main.c @ 38:17a5107b6fa4

- added perspective correct interpolation - added recording functionality - added video capture functionality

author	John Tsiombikas <nuclear@member.fsf.org>
date	Mon, 10 Mar 2014 17:24:42 +0200
parents	c6406e4aa0fb
children

line source

1 #include <stdio.h>

2 #include <stdlib.h>

3 #include <string.h>

4 #include <math.h>

5 #include <limits.h>

6 #include <signal.h>

7 #include <conio.h>

8 #include "wvga.h"

9 #include "mingl.h"

10 #include "timer.h"

11 #include "keyb.h"

12 #include "mouse.h"

13 #include "texture.h"

14 #include "palman.h"

15 #include "scene.h"

16 #include "record.h"

18 #define DEG2RAD(x) (M_PI * (x) / 180.0)

20 static int init(void);

21 static void shutdown(void);

22 static void update(unsigned long msec, unsigned long dtmsec);

23 static void redraw(void);

24 static int proc_events(void);

25 static void mouse_button(int bn, int x, int y);

26 static void mouse_motion(int x, int y);

27 static void sighandler(int s);

28 static int parse_args(int argc, char **argv);

31 static float cam_x, cam_y, cam_z;

32 static float cam_theta, cam_phi;

34 static float walk_speed = 6.0;

35 static float look_speed = 0.3;

37 static int mouse_look = 1;

38 static int use_vsync;

40 static void *fbuf;

41 static struct scene scn;

43 #define REC_FNAME "game.rec"

44 static int rec_playing, rec_recording;

45 static unsigned long rec_start_time;

48 int main(int argc, char **argv)

49 {

50 unsigned long prev_msec = 0;

52 if(parse_args(argc, argv) == -1) {

53 return 1;

54 }

56 if(init() == -1) {

57 return 1;

58 }

60 for(;;) {

61 unsigned long msec = get_msec();

62 unsigned long dt = msec - prev_msec;

63 prev_msec = msec;

65 if(!proc_events()) {

66 break;

67 }

69 update(msec, dt);

70 redraw();

71 }

73 shutdown();

74 return 0;

75 }

78 static int init(void)

79 {

80 float vfov, aspect;

82 aspect = 320.0 / 200.0;

83 vfov = 60.0;

85 init_timer(100);

86 kb_init(16); /* 16 characters input buffer */

88 set_video_mode(0x13);

90 signal(SIGINT, sighandler);

91 signal(SIGSEGV, sighandler);

92 signal(SIGFPE, sighandler);

93 signal(SIGILL, sighandler);

94 signal(SIGABRT, sighandler);

96 if(mgl_init(320, 200) == -1) {

97 fprintf(stderr, "mgl init failed\n");

98 return -1;

99 }

100 fbuf = mgl_framebuffer();

101

102 mgl_enable(MGL_CULL_FACE);

103 mgl_enable(MGL_SMOOTH);

104 mgl_enable(MGL_LIGHTING);

105 mgl_enable(MGL_DEPTH_TEST);

106

107 mgl_matrix_mode(MGL_PROJECTION);

108 mgl_load_identity();

109 mgl_perspective(vfov, aspect, 0.5, 200.0);

110

111 #if 0

112 mgl_enable(MGL_CLIP_PLANE0);

113 mgl_enable(MGL_CLIP_PLANE1);

114 mgl_enable(MGL_CLIP_PLANE2);

115 mgl_enable(MGL_CLIP_PLANE3);

116 mgl_clip_plane(MGL_CLIP_PLANE0, -1, 0, -1, 0); /* positive X */

117 mgl_clip_plane(MGL_CLIP_PLANE1, 1, 0, -1, 0); /* negative X */

118 mgl_clip_plane(MGL_CLIP_PLANE2, 0, -1, -0.5, 0); /* positive Y */

119 mgl_clip_plane(MGL_CLIP_PLANE3, 0, 1, -0.5, 0); /* negative Y */

120 #endif

121

122 /* setup palette */

123 palm_add_color(255, 255, 255);

124

125 scn_init(&scn);

126 if(scn_load(&scn, "data/hall.obj") == -1) {

127 return -1;

128 }

129

130 palm_build();

131 {

132 int i, palsz = palm_palette_size();

133 struct palm_color *pal = palm_palette();

134

135 for(i=0; i<palsz; i++) {

136 set_pal_entry(i, pal[i].r, pal[i].g, pal[i].b);

137 }

138 }

139

140 mgl_color_range(palm_color_range() - 1);

141 return 0;

142 }

143

144 static void shutdown(void)

145 {

146 mgl_free();

147 set_video_mode(3);

148 kb_shutdown();

149 }

150

151

152 #define DEG_TO_RAD(x) (M_PI * (x) / 180.0)

153 void cam_move(float dx, float dy)

154 {

155 float angle = DEG_TO_RAD(cam_theta);

156 cam_x += cos(angle) * dx + sin(angle) * dy;

157 cam_z -= -sin(angle) * dx + cos(angle) * dy;

158 }

159

160 static void update(unsigned long msec, unsigned long dtmsec)

161 {

162 float dt = (float)dtmsec / 1000.0f;

163 float offs = walk_speed * dt;

164

165 if(kb_isdown('w') || kb_isdown('W'))

166 cam_move(0, offs);

167

168 if(kb_isdown('s') || kb_isdown('S'))

169 cam_move(0, -offs);

170

171 if(kb_isdown('a') || kb_isdown('A'))

172 cam_move(-offs, 0);

173

174 if(kb_isdown('d') || kb_isdown('D'))

175 cam_move(offs, 0);

176

177 if(rec_playing) {

178 rec_get(msec - rec_start_time, &cam_x, &cam_y, &cam_z, &cam_theta, &cam_phi);

179 } else if(rec_recording) {

180 static float px, py, pz, ptheta, pphi;

181

182 if(cam_x != px || cam_y != py || cam_z != pz || cam_theta != ptheta || cam_phi != pphi) {

183 rec_add(msec - rec_start_time, cam_x, cam_y, cam_z, cam_theta, cam_phi);

184 px = cam_x;

185 py = cam_y;

186 pz = cam_z;

187 ptheta = cam_theta;

188 pphi = cam_phi;

189 }

190 }

191 }

192

193 static void redraw(void)

194 {

195 mgl_clear(0);

196 mgl_clear_depth();

197

198 mgl_matrix_mode(MGL_MODELVIEW);

199 mgl_load_identity();

200 mgl_rotate(cam_phi, 1, 0, 0);

201 mgl_rotate(cam_theta, 0, 1, 0);

202 mgl_translate(-cam_x, -cam_y, -cam_z);

203 mgl_translate(0, -2.0, 0);

204

205 mgl_light_intensity(0, 1.0);

206 mgl_light_position(0, 0, 5, 0, 1);

207

208 /*mgl_torus(0.75, 0.25, 16, 8);*/

209 scn_render(&scn);

210

211 copy_frame(fbuf);

212 if(use_vsync) {

213 wait_vsync();

214 }

215 }

216

217 static int proc_events(void)

218 {

219 static int prev_mx, prev_my, prev_bnmask;

220 int mx, my, bnmask;

221

222 int key;

223 while((key = kb_getkey()) != -1) {

224 switch(key) {

225 case 27:

226 return 0;

227

228 case '\b':

229 begin_capture(1);

230 break;

231 case '\\':

232 {

233 static int capturing;

234 if(capturing) {

235 printf("stop video capture\n");

236 end_capture();

237 capturing = 0;

238 } else {

239 printf("start video capture\n");

240 begin_capture(INT_MAX);

241 capturing = 1;

242 }

243 }

244 break;

245

246 case '`':

247 mouse_look = !mouse_look;

248 break;

249

250 case 'r':

251 if(rec_recording) {

252 /* stop recording and save it */

253 rec_recording = 0;

254 printf("done, saving %s\n", REC_FNAME);

255 rec_save(REC_FNAME);

256 } else {

257 printf("recording ...\n");

258 rec_recording = 1;

259 rec_playing = 0;

260 rec_reset();

261 rec_start_time = get_msec();

262 }

263 break;

264

265 case 'l':

266 printf("loading recording %s\n", REC_FNAME);

267 rec_recording = 0;

268 rec_playing = 0;

269 rec_reset();

270 rec_load(REC_FNAME);

271 break;

272

273 case ' ':

274 if(rec_recording) {

275 break;

276 }

277

278 if(rec_playing) {

279 printf("stop rec playback\n");

280 rec_playing = 0;

281 } else {

282 printf("start rec playback\n");

283 rec_playing = 1;

284 rec_start_time = get_msec();

285 }

286 break;

287

288 default:

289 break;

290 }

291 }

292

293 bnmask = read_mouse(&mx, &my);

294 if(bnmask != prev_bnmask) {

295 mouse_button(bnmask, mx, my);

296 prev_bnmask = bnmask;

297 }

298 if(mx != prev_mx || my != prev_my) {

299 mouse_motion(mx, my);

300 prev_mx = mx;

301 prev_my = my;

302 }

303 return 1;

304 }

305

306 static int bnstate;

307 static void mouse_button(int bn, int x, int y)

308 {

309 bnstate = bn;

310 }

311

312 static void mouse_motion(int x, int y)

313 {

314 static int prev_x = -1, prev_y;

315 int dx = x - prev_x;

316 int dy = y - prev_y;

317

318 if(mouse_look) {

319 if(prev_x == -1) {

320 dx = dy = 0;

321 }

322

323 set_mouse(160, 100);

324 prev_x = 160;

325 prev_y = 100;

326 } else {

327 prev_x = x;

328 prev_y = y;

329 }

330

331 if(mouse_look || bnstate) {

332 cam_theta += dx * look_speed;

333 cam_phi += dy * look_speed;

334

335 if(cam_phi < -90) {

336 cam_phi = -90;

337 }

338 if(cam_phi > 90) {

339 cam_phi = 90;

340 }

341 }

342 }

343

344 static void sighandler(int s)

345 {

346 set_video_mode(3);

347

348 switch(s) {

349 case SIGABRT:

350 fprintf(stderr, "abort\n");

351 break;

352

353 case SIGILL:

354 fprintf(stderr, "illegal operation\n");

355 break;

356

357 case SIGSEGV:

358 fprintf(stderr, "segmentation fault\n");

359 break;

360

361 case SIGINT:

362 fprintf(stderr, "interrupted\n");

363 break;

364

365 case SIGFPE:

366 fprintf(stderr, "floating point exception\n");

367 break;

368

369 default:

370 fprintf(stderr, "unexpected signal\n");

371 }

372

373 exit(1);

374 }

375

376 static int parse_args(int argc, char **argv)

377 {

378 int i;

379

380 for(i=1; i<argc; i++) {

381 if(argv[i][0] == '-') {

382 if(strcmp(argv[i], "-vsync") == 0) {

383 use_vsync = 1;

384 } else {

385 goto invalid;

386 }

387 } else {

388 goto invalid;

389 }

390 }

391

392 return 0;

393

394 invalid:

395 fprintf(stderr, "invalid argument: %s\n", argv[i]);

396 return -1;

397 }