dos3d: 4a0e9ab12ad0 src/test.c

dos3d

view src/test.c @ 15:4a0e9ab12ad0

separated vec2/vec3/vec4 in a different header file

author	John Tsiombikas <nuclear@member.fsf.org>
date	Tue, 29 Nov 2011 07:23:12 +0200
parents	059bb38506b3
children	777be77b6432

line source

1 /*

2 256-color 3D graphics hack for real-mode DOS.

5 This program is free software: you can redistribute it and/or modify

6 it under the terms of the GNU General Public License as published by

7 the Free Software Foundation, either version 3 of the License, or

8 (at your option) any later version.

10 This program is distributed in the hope that it will be useful,

11 but WITHOUT ANY WARRANTY; without even the implied warranty of

12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

13 GNU General Public License for more details.

15 You should have received a copy of the GNU General Public License

16 along with this program. If not, see <http://www.gnu.org/licenses/>.

17 */

18 #include <stdio.h>

19 #include <stdlib.h>

20 #include <string.h>

21 #include <signal.h>

22 #include <conio.h>

23 #include "vga.h"

24 #include "mingl.h"

25 #include "timer.h"

26 #include "mouse.h"

27 #include "palman.h"

28 #include "texture.h"

30 static int init(void);

31 static void shutdown(void);

32 static void redraw(void);

33 static void draw_cursor(unsigned char *fb, int xsz, int ysz, int mx, int my, int cidx);

34 static int keyb(char key);

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

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

37 static void sighandler(int s);

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

39 static void print_perf(void);

41 static unsigned char *fbuf;

43 static struct texture *tex;

44 static char *texfile;

46 static int white_base, red_base, green_base, blue_base;

47 static int grad_range;

49 static int use_vsync = 1;

50 static int under_windows = 0;

51 static unsigned long num_frm;

53 enum { CUBE, SPHERE, TORUS, NUM_PRIMS };

54 static int prim = SPHERE;

55 static int auto_rotate = 1;

56 static float cam_theta, cam_phi, cam_zoom = 4.0;

58 static int mx, my;

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

61 {

62 int mbn, prev_mx = -1, prev_my = -1, prev_mbn = 0;

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

65 return 1;

66 }

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

69 return 1;

70 }

72 reset_timer();

74 for(;;) {

75 if(kbhit()) {

76 if(keyb(getch()) == 0) {

77 break;

78 }

79 }

81 mbn = read_mouse(&mx, &my);

82 if(mbn != prev_mbn) {

83 mouse_button(mbn, mx, my);

84 prev_mbn = mbn;

85 }

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

87 if(mbn) {

88 mouse_motion(mx, my);

89 }

90 prev_mx = mx;

91 prev_my = my;

92 }

94 redraw();

95 }

97 shutdown();

98 print_perf();

99 return 0;

100 }

101

102 static int init(void)

103 {

104 int i;

105 struct palm_color *pal;

106

107 init_timer(under_windows ? 0 : 100);

108

109 set_video_mode(0x13);

110

111 signal(SIGINT, sighandler);

112 signal(SIGSEGV, sighandler);

113 signal(SIGFPE, sighandler);

114 signal(SIGILL, sighandler);

115 signal(SIGABRT, sighandler);

116

117 have_mouse();

118

119

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

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

122 return -1;

123 }

124 fbuf = mgl_framebuffer();

125

126

127 if(!texfile) {

128 palm_add_color(255, 255, 255);

129 palm_add_color(255, 0, 0);

130 palm_add_color(0, 255, 0);

131 palm_add_color(0, 0, 255);

132 palm_build();

133

134 white_base = palm_color_base(255, 255, 255);

135 red_base = palm_color_base(255, 0, 0);

136 green_base = palm_color_base(0, 255, 0);

137 blue_base = palm_color_base(0, 0, 255);

138

139 tex = tex_gen_checker(64, 64, 3, 3, red_base, blue_base);

140 } else {

141 if(!(tex = load_texture(texfile))) {

142 return -1;

143 }

144

145 palm_build();

146 get_texture_pixels(tex);

147

148 mgl_enable(MGL_TEXTURE_2D);

149 }

150

151 grad_range = palm_color_range();

152

153 pal = palm_palette();

154 for(i=0; i<palm_palette_size(); i++) {

155 set_palette(i, pal[i].r, pal[i].g, pal[i].b);

156 }

157

158 mgl_enable(MGL_CULL_FACE);

159 mgl_enable(MGL_DEPTH_TEST);

160 mgl_enable(MGL_SMOOTH);

161 mgl_color_range(grad_range - 1); /* gradient range */

162

163 mgl_enable(MGL_LIGHTING);

164 mgl_light_intensity(0, 1.0);

165 mgl_light_position(0, -0.5, 0.5, 1, 0);

166

167 mgl_matrix_mode(MGL_PROJECTION);

168 mgl_load_identity();

169 mgl_perspective(45.0, 320.0 / 200.0, 0.5, 100.0);

170

171 mgl_teximage(tex->width, tex->height, tex->pixels);

172

173 return 0;

174 }

175

176 static void shutdown(void)

177 {

178 mgl_free();

179 set_video_mode(3);

180 }

181

182 static void redraw(void)

183 {

184 float angle = get_msec() / 10.0;

185 mgl_clear(0);

186 mgl_clear_depth();

187

188 mgl_matrix_mode(MGL_MODELVIEW);

189 mgl_load_identity();

190 if(auto_rotate) {

191 mgl_rotate(angle, 0, 0, 1);

192 mgl_rotate(angle * 0.5, 1, 0, 0);

193 } else {

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

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

196 }

197 mgl_translate(0, 0, -cam_zoom);

198

199 switch(prim) {

200 case TORUS:

201 mgl_index(green_base);

202 mgl_torus(1.0, 0.25, 16, 8);

203 break;

204 case SPHERE:

205 mgl_index(blue_base);

206 mgl_sphere(1.0, 16, 8);

207 break;

208 case CUBE:

209 mgl_index(red_base);

210 mgl_cube(1.0);

211 }

212

213 if(!auto_rotate) {

214 draw_cursor(fbuf, 320, 200, mx, my, white_base + grad_range - 1);

215 }

216

217 copy_frame(fbuf);

218 if(use_vsync) {

219 wait_vsync();

220 }

221 num_frm++;

222 }

223

224 static void draw_cursor(unsigned char *fb, int xsz, int ysz, int mx, int my, int cidx)

225 {

226 static char img[] =

227 "oo........"

228 "oxo......."

229 "oxxo......"

230 "oxxxo....."

231 "oxxxxo...."

232 "oxxxxxo..."

233 "oxxxxxxo.."

234 "oxxxxxxxo."

235 "oxxxxxxxxo"

236 "oxxxxxoooo"

237 "oxxoxxo..."

238 "oxo.oxxo.."

239 "oo..oxxo.."

240 ".....oxxo."

241 ".....oxxo."

242 "......oo..";

243 int i, j, w = 10, h = 16;

244

245 if(mx < 0 || my < 0) {

246 return;

247 }

248 if(mx + w >= xsz) {

249 w = xsz - mx;

250 }

251 if(my + h >= ysz) {

252 h = ysz - my;

253 }

254

255 fb += my * xsz + mx;

256 for(i=0; i<h; i++) {

257 for(j=0; j<w; j++) {

258 char c = img[(i << 3) + (i << 1) + j];

259 if(c != '.') {

260 fb[j] = c == 'x' ? 0 : cidx;

261 }

262 }

263 fb += xsz;

264 }

265 }

266

267 static int keyb(char key)

268 {

269 switch(key) {

270 case 'q':

271 case 27:

272 return 0;

273

274 case 's':

275 if(mgl_isenabled(MGL_SMOOTH)) {

276 mgl_disable(MGL_SMOOTH);

277 } else {

278 mgl_enable(MGL_SMOOTH);

279 }

280 break;

281

282 case 't':

283 if(mgl_isenabled(MGL_TEXTURE_2D)) {

284 mgl_disable(MGL_TEXTURE_2D);

285 } else {

286 mgl_enable(MGL_TEXTURE_2D);

287 }

288 break;

289

290 case ' ':

291 auto_rotate = !auto_rotate;

292 break;

293

294 case 'p':

295 prim = (prim + 1) % NUM_PRIMS;

296 break;

297

298 default:

299 break;

300 }

301 return 1;

302 }

303

304 static int bnstate;

305 static int prev_x, prev_y;

306

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

308 {

309 bnstate = bn;

310 prev_x = x;

311 prev_y = y;

312 }

313

314 static void mouse_motion(int x, int y)

315 {

316 int dx, dy;

317

318 dx = x - prev_x;

319 dy = y - prev_y;

320 prev_x = x;

321 prev_y = y;

322

323 if(bnstate & MOUSE_LEFT) {

324 cam_theta += dx;

325 cam_phi += dy;

326

327 if(cam_phi > 90) cam_phi = 90;

328 if(cam_phi < -90) cam_phi = -90;

329 }

330 if(bnstate & MOUSE_RIGHT) {

331 cam_zoom += dy * 0.1;

332 if(cam_zoom < 0.0) {

333 cam_zoom = 0.0;

334 }

335 }

336 }

337

338 static void sighandler(int s)

339 {

340 set_video_mode(3);

341

342 switch(s) {

343 case SIGABRT:

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

345 break;

346

347 case SIGILL:

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

349 break;

350

351 case SIGSEGV:

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

353 break;

354

355 case SIGINT:

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

357 break;

358

359 case SIGFPE:

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

361 break;

362

363 default:

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

365 }

366

367 exit(1);

368 }

369

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

371 {

372 int i;

373

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

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

376 if(argv[i][2] != 0) {

377 goto invalid;

378 }

379 switch(argv[i][1]) {

380 case 'a':

381 auto_rotate = !auto_rotate;

382 break;

383

384 case 't':

385 texfile = argv[++i];

386 break;

387

388 case 'v':

389 use_vsync = !use_vsync;

390 break;

391

392 case 'p':

393 if(strcmp(argv[++i], "cube") == 0) {

394 prim = CUBE;

395 } else if(strcmp(argv[i], "sphere") == 0) {

396 prim = SPHERE;

397 } else if(strcmp(argv[i], "torus") == 0) {

398 prim = TORUS;

399 } else {

400 goto invalid;

401 }

402 break;

403

404 case 'w':

405 under_windows = 1;

406 break;

407

408 case 'h':

409 printf("Usage %s [options]\n", argv[0]);

410 printf("options:\n");

411 printf(" -p select one of (cube|sphere|torus)\n");

412 printf(" -v use vsync\n");

413 printf(" -w run under windows\n");

414 printf(" -h print usage information and exit\n");

415 exit(0);

416

417 default:

418 goto invalid;

419 }

420 } else {

421 goto invalid;

422 }

423 }

424

425 return 0;

426

427 invalid:

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

429 return -1;

430 }

431

432

433 static void print_perf(void)

434 {

435 unsigned long msec, avg_frame_time;

436 float sec, fps;

437

438 msec = get_msec();

439 if(!num_frm || msec < 1000) {

440 printf("leaving so soon? (%lu ms)\n", msec);

441 return;

442 }

443

444 sec = msec / 1000.0f;

445 fps = (float)num_frm / sec;

446 avg_frame_time = msec / num_frm;

447

448 printf("%lu frames in %.2f seconds\n", num_frm, sec);

449 printf(" avg. frame time: %lu ms\n", avg_frame_time);

450 printf(" avg. framerate: %.2f fps\n", fps);

451 }