vrheights: 0168104ec568 src/game.cc

vrheights

view src/game.cc @ 13:0168104ec568

- added new files to the vs project - fixed bug caused by LibOVR's failure to restore OpenGL state

author	John Tsiombikas <nuclear@member.fsf.org>
date	Sat, 04 Oct 2014 03:41:59 +0300
parents	537db3079134
children

line source

1 #include <stdio.h>

2 #include <assert.h>

3 #include <vector>

4 #include <algorithm>

5 #include <vmath/vmath.h>

6 #include "opengl.h"

7 #include "game.h"

8 #include "goatvr.h"

9 #include "teapot.h"

10 #include "console.h"

11 #include "drawtext.h"

12 #include "game_var.h"

13 #include "scenefile.h"

15 static void draw_scene();

16 static void material(float r, float g, float b, float roughness);

17 static void toggle_hmd_fullscr();

18 static void create_rtarg(int x, int y);

19 static int next_pow2(int x);

20 static void con_handle(const char *cmd);

22 static int win_width, win_height;

23 static unsigned int fb_tex;

24 static unsigned int fbo, fb_depth;

25 static int fb_xsz, fb_ysz;

26 static int fb_tex_xsz, fb_tex_ysz;

28 static unsigned int chess_tex;

30 static float cam_theta = -90, cam_phi;

31 static Vector3 cam_pos = Vector3(15.4, 0, 0);

32 static bool keystate[256];

34 static float cam_vvel;

35 static const float grav = -9.8;

37 static Console con;

38 static dtx_font *con_font;

40 static SceneFile scn;

42 #define GVAR_LOOK_WALK "look-walk"

43 #define GVAR_MAX_STEP "max-step"

45 bool game_init()

46 {

47 init_opengl();

49 if(!(con_font = dtx_open_font_glyphmap("data/mono14.glyphmap"))) {

50 fprintf(stderr, "failed to open console font\n");

51 return false;

52 }

53 con.set_font(con_font, 14);

54 con.set_size(7, 52);

55 con.set_position(0, 0, Console::CENTER);

56 con.set_command_func(con_handle);

57 con.set_echo(false);

60 if(vr_init() == -1) {

61 return false;

62 }

64 glEnable(GL_DEPTH_TEST);

65 glEnable(GL_CULL_FACE);

66 glEnable(GL_LIGHTING);

68 unsigned char chess_pixels[] = {

69 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0x00, 0xff,

70 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0x00, 0xff

71 };

72 glGenTextures(1, &chess_tex);

73 glBindTexture(GL_TEXTURE_2D, chess_tex);

74 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

75 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

76 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 4, 4, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, chess_pixels);

78 if(!scn.load("data/sibenik.goatsce")) {

79 fprintf(stderr, "failed to load scene file\n");

80 return false;

81 }

83 /* initialize all option variables */

84 set_gvar_bool(GVAR_LOOK_WALK, true);

85 set_gvar_num(GVAR_MAX_STEP, 0.5);

87 return true;

88 }

90 void game_cleanup()

91 {

92 vr_shutdown();

93 }

95 void game_update(long tm)

96 {

97 static long prev_upd;

98 float dt = (tm - prev_upd) / 1000.0;

99 prev_upd = tm;

100

101 if(con.is_visible()) {

102 con.update();

103 return;

104 }

105

106 float offs = dt * 5.0;

107 Vector3 dir;

108

109 if(keystate['d'] || keystate['D']) {

110 dir += Vector3(offs, 0, 0);

111 }

112 if(keystate['a'] || keystate['A']) {

113 dir += Vector3(-offs, 0, 0);

114 }

115 if(keystate['w'] || keystate['W']) {

116 dir += Vector3(0, 0, -offs);

117 }

118 if(keystate['s'] || keystate['S']) {

119 dir += Vector3(0, 0, offs);

120 }

121

122 if(get_gvar_bool(GVAR_LOOK_WALK)) {

123 float rot[4];

124 vr_view_rotation(0, rot);

125 Quaternion q(rot[3], rot[0], rot[1], rot[2]);

126

127 dir.transform(q);

128 }

129

130 float cos_theta = cos(DEG_TO_RAD(cam_theta));

131 float sin_theta = sin(DEG_TO_RAD(cam_theta));

132 cam_pos.x += dir.x * cos_theta - dir.z * sin_theta;

133 cam_pos.z += dir.x * sin_theta + dir.z * cos_theta;

134

135 float max_step = get_gvar_num(GVAR_MAX_STEP);

136 Vector3 floor_pos = scn.find_walk_pos(cam_pos + Vector3(0, max_step, 0));

137

138 if(floor_pos.y < cam_pos.y) {

139 cam_vvel += grav * dt;

140 cam_pos.y += cam_vvel * dt;

141 if(cam_pos.y <= floor_pos.y) {

142 cam_pos.y = floor_pos.y;

143 cam_vvel = 0;

144 }

145 } else {

146 cam_pos.y = floor_pos.y;

147 cam_vvel = 0;

148 }

149 }

150

151 void game_display()

152 {

153 glBindFramebuffer(GL_FRAMEBUFFER, fbo);

154 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

155

156 for(int i=0; i<2; i++) {

157 glViewport(i == 0 ? 0 : fb_xsz / 2, 0, fb_xsz / 2, fb_ysz);

158 vr_begin(i);

159

160 float proj[16];

161 if(vr_proj_matrix(i, 0.5, 500.0, proj)) {

162 glMatrixMode(GL_PROJECTION);

163 glLoadMatrixf(proj);

164 }

165

166 glMatrixMode(GL_MODELVIEW);

167

168 float view[16];

169 vr_view_matrix(i, view);

170 glLoadMatrixf(view);

171 glRotatef(cam_phi, 1, 0, 0);

172 glRotatef(cam_theta, 0, 1, 0);

173 /* move the camera to the eye level of the user */

174 glTranslatef(0, -vr_getf_def(VR_EYE_HEIGHT, 1.65), 0);

175 glTranslatef(-cam_pos.x, -cam_pos.y, -cam_pos.z);

176

177 draw_scene();

178 con.draw();

179

180 vr_end();

181 }

182

183 glBindFramebuffer(GL_FRAMEBUFFER, 0);

184 glViewport(0, 0, win_width, win_height);

185

186 vr_swap_buffers();

187 assert(glGetError() == GL_NO_ERROR);

188 }

189

190 void game_reshape(int x, int y)

191 {

192 win_width = x;

193 win_height = y;

194

195 create_rtarg(vr_geti_def(VR_RENDER_XRES, x * 2), vr_geti_def(VR_RENDER_YRES, y));

196 vr_output_texture(fb_tex, 0, 0, (float)fb_xsz / (float)fb_tex_xsz, (float)fb_ysz / (float)fb_tex_ysz);

197

198 /* these might be overriden in VR mode (see game_display) */

199 glViewport(0, 0, x, y);

200 glMatrixMode(GL_PROJECTION);

201 glLoadIdentity();

202 gluPerspective(50.0, (float)x / (float)y, 0.5, 500.0);

203 }

204

205 void game_keyboard(int key, bool pressed)

206 {

207 if(pressed) {

208 if(con.is_visible()) {

209 if(key == 27 || key == '`') {

210 con.hide();

211 } else {

212 con.input_key(key);

213 }

214 } else {

215 switch(key) {

216 case 27:

217 exit_game();

218 break;

219

220 case 'f':

221 toggle_hmd_fullscr();

222 break;

223

224 case 'r':

225 vr_recenter();

226 break;

227

228 case '`':

229 con.show();

230 break;

231

232 default:

233 break;

234 }

235 }

236 }

237

238 if(key < 256) {

239 keystate[key] = pressed;

240 }

241 }

242

243

244 static int prev_x, prev_y;

245 static bool bnstate[32];

246

247 void game_mouse_button(int bn, bool state, int x, int y)

248 {

249 bnstate[bn] = state;

250 prev_x = x;

251 prev_y = y;

252 }

253

254 void game_mouse_motion(int x, int y)

255 {

256 int dx = x - prev_x;

257 int dy = y - prev_y;

258 prev_x = x;

259 prev_y = y;

260

261 if(!dx && !dy) {

262 return;

263 }

264 if(bnstate[0]) {

265 cam_theta += dx * 0.5;

266 cam_phi += dy * 0.5;

267

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

269 if(cam_phi > 90) cam_phi = 90;

270 }

271 }

272

273 MeshFace dbg_walk_face;

274

275 static void draw_scene()

276 {

277 float lpos[][4] = {

278 {-0.7, 0.7, 1, 0},

279 {1, 0, 1, 0}

280 };

281 float lcol[][4] = {

282 {0.9, 0.7, 0.6, 1},

283 {0.3, 0.4, 0.75, 1}

284 };

285 for(int i=0; i<2; i++) {

286 glEnable(GL_LIGHT0 + i);

287 glLightfv(GL_LIGHT0 + i, GL_POSITION, lpos[i]);

288 glLightfv(GL_LIGHT0 + i, GL_DIFFUSE, lcol[i]);

289 glLightfv(GL_LIGHT0 + i, GL_SPECULAR, lcol[i]);

290 }

291

292 glMatrixMode(GL_MODELVIEW);

293

294 /*glBindTexture(GL_TEXTURE_2D, chess_tex);

295 glEnable(GL_TEXTURE_2D);

296 material(1, 1, 1, 1);

297 glBegin(GL_QUADS);

298 glNormal3f(0, 1, 0);

299 glTexCoord2f(0, 0); glVertex3f(-10, 0, 10);

300 glTexCoord2f(1, 0); glVertex3f(10, 0, 10);

301 glTexCoord2f(1, 1); glVertex3f(10, 0, -10);

302 glTexCoord2f(0, 1); glVertex3f(-10, 0, -10);

303 glEnd();

304 glDisable(GL_TEXTURE_2D);

305

306 material(1, 1, 1, 0.4);

307 glPushMatrix();

308 glTranslatef(0, 1.3, -10);

309 glFrontFace(GL_CW);

310 bezier_teapot(2.0);

311 glFrontFace(GL_CCW);

312 glPopMatrix();*/

313

314 glBindBuffer(GL_ARRAY_BUFFER, 0);

315 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);

316

317 for(size_t i=0; i<scn.obj.size(); i++) {

318 scn.obj[i]->draw();

319 }

320

321 /*glPushAttrib(GL_ENABLE_BIT);

322 glDisable(GL_DEPTH_TEST);

323 glDisable(GL_LIGHTING);

324

325 glBegin(GL_TRIANGLES);

326 glColor3f(0, 1, 0);

327 glVertex3fv(&dbg_walk_face.v[0].x);

328 glVertex3fv(&dbg_walk_face.v[1].x);

329 glVertex3fv(&dbg_walk_face.v[2].x);

330 glColor3f(1, 1, 1);

331 glEnd();

332

333 glPopAttrib();*/

334 }

335

336 static void material(float r, float g, float b, float roughness)

337 {

338 float gloss = 1.0 - roughness;

339 float diffuse[] = {r * roughness, g * roughness, b * roughness, 1.0};

340 float specular[] = {gloss, gloss, gloss, 1.0};

341 float shin = gloss * 128.0;

342

343 glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, diffuse);

344 glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, specular);

345 glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, shin);

346 }

347

348

349 static void toggle_hmd_fullscr()

350 {

351 static bool fullscr;

352 static int prev_x, prev_y;

353 //static int prev_xsz, prev_ysz;

354

355 fullscr = !fullscr;

356 if(fullscr) {

357 /* entering fullscreen on the HMD */

358 int xoffs = vr_geti_def(VR_WIN_XOFFS, -1);

359 int yoffs = vr_geti_def(VR_WIN_YOFFS, -1);

360 if(xoffs != -1) {

361 get_window_pos(&prev_x, &prev_y);

362 move_window(xoffs, yoffs);

363 }

364

365 int xsz = vr_geti_def(VR_DISPLAY_WIDTH, -1);

366 int ysz = vr_geti_def(VR_DISPLAY_HEIGHT, -1);

367 if(xsz != -1) {

368 //prev_xsz = win_width;

369 //prev_ysz = win_height;

370 resize_window(xsz, ysz);

371 }

372 enter_fullscreen();

373

374 } else {

375 /* leaving fullscreen */

376 leave_fullscreen();

377 /*move_window(prev_x, prev_y);

378 resize_window(prev_xsz, prev_ysz);*/

379 }

380 }

381

382 static void create_rtarg(int x, int y)

383 {

384 if(x == fb_xsz && y == fb_ysz) {

385 return; // nothing changed

386 }

387

388 fb_xsz = x;

389 fb_ysz = y;

390 fb_tex_xsz = next_pow2(fb_xsz);

391 fb_tex_ysz = next_pow2(fb_ysz);

392

393 printf("creating %dx%d render target (tex size: %dx%d)\n", fb_xsz, fb_ysz, fb_tex_xsz, fb_tex_ysz);

394

395 if(!fbo) {

396 glGenFramebuffers(1, &fbo);

397

398 glGenTextures(1, &fb_tex);

399 glBindTexture(GL_TEXTURE_2D, fb_tex);

400 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

401 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

402

403 glGenRenderbuffers(1, &fb_depth);

404 }

405

406 glBindFramebuffer(GL_FRAMEBUFFER, fbo);

407

408 glBindTexture(GL_TEXTURE_2D, fb_tex);

409 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, fb_tex_xsz, fb_tex_ysz, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);

410 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, fb_tex, 0);

411

412 glBindRenderbuffer(GL_RENDERBUFFER, fb_depth);

413 glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, fb_tex_xsz, fb_tex_ysz);

414 glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, fb_depth);

415

416 assert(glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE);

417 glBindFramebuffer(GL_FRAMEBUFFER, 0);

418 }

419

420 static int next_pow2(int x)

421 {

422 x -= 1;

423 x |= x >> 1;

424 x |= x >> 2;

425 x |= x >> 4;

426 x |= x >> 8;

427 x |= x >> 16;

428 return x + 1;

429 }

430

431 static const char *strip_spaces(const char *str)

432 {

433 while(*str && isspace(*str)) str++;

434 return str;

435 }

436

437 struct Variable {

438 const char *var;

439 enum { BOOL, NUM } type;

440 bool bool_val;

441 float num_val;

442 };

443

444 static void con_handle(const char *cmd)

445 {

446 /* set debug values */

447 set_gvar_num("cam-pos-x", cam_pos[0]);

448 set_gvar_num("cam-pos-y", cam_pos[1]);

449 set_gvar_num("cam-pos-z", cam_pos[2]);

450

451 std::vector<char*> argv;

452 cmd = strip_spaces(cmd);

453

454 if(!*cmd || *cmd == '#') {

455 return;

456 }

457

458 char *line = (char*)alloca(strlen(cmd) + 1);

459 strcpy(line, cmd);

460

461 char *tok = 0;

462 while((tok = strtok(tok ? 0 : line, " \t\v\n\r"))) {

463 argv.push_back(tok);

464 }

465

466 if(strcmp(argv[0], "set") == 0) {

467 if(argv.size() < 3) {

468 con.printf("set must be followed by 2 arguments\n");

469 return;

470 }

471 if(have_gvar(argv[1])) {

472 GameVariable &gv = get_gvar(argv[1]);

473 con.printf("%s->%s (prev: %s)\n", argv[1], argv[2], gv.to_str().c_str());

474 } else {

475 con.printf("%s->%s\n", argv[1], argv[2]);

476 }

477

478 int type = set_gvar_parse(argv[1], argv[2]);

479 if(type == GameVariable::NUMBER) {

480 vr_setf(argv[1], atof(argv[2]));

481 } else if(type == GameVariable::BOOL) {

482 vr_seti(argv[1], get_gvar_bool(argv[1]) ? 1 : 0);

483 }

484

485 // update state vars

486 cam_pos[0] = get_gvar_num("cam-pos-x");

487 cam_pos[1] = get_gvar_num("cam-pos-y");

488 cam_pos[2] = get_gvar_num("cam-pos-z");

489

490 } else if(strcmp(argv[0], "get") == 0) {

491 if(argv.size() < 2) {

492 con.printf("get must be followed by the variable name\n");

493 return;

494 }

495 if(have_gvar(argv[1])) {

496 GameVariable &gv = get_gvar(argv[1]);

497 con.printf("%s: %s\n", argv[1], gv.to_str().c_str());

498 }

499

500 } else if(strcmp(argv[0], "vars") == 0) {

501 std::list<std::string> vars = get_gvar_list();

502 std::list<std::string>::const_iterator it = vars.begin();

503 while(it != vars.end()) {

504 con.printf(" %s\n", it++->c_str());

505 }

506

507 } else if(strcmp(argv[0], "exit") == 0 || strcmp(argv[0], "quit") == 0) {

508 exit_game();

509

510 } else if(strcmp(argv[0], "help") == 0) {

511 con.printf("available commands:\n");

512 con.printf(" set <var> <val> set value to a variable\n");

513 con.printf(" get <var> print the value of a variable\n");

514 con.printf(" vars print a list of all variables\n");

515 con.printf(" help print this help screen\n");

516 con.printf(" exit or quit quit the program\n");

517

518 } else {

519 con.printf("invalid command: %s\n", argv[0]);

520 }

521 }