vrheights: 3f221bdc9bab src/game.cc

vrheights

view src/game.cc @ 8:3f221bdc9bab

mesh loading walk polys

author	John Tsiombikas <nuclear@member.fsf.org>
date	Fri, 03 Oct 2014 04:16:16 +0300
parents	0eca023ed909
children	df3a70664a7d

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 = {15.4, 0, 0};

32 static bool keystate[256];

34 static Console con;

35 static dtx_font *con_font;

37 static SceneFile scn;

39 #define GVAR_LOOK_WALK "look-walk"

40 #define GVAR_MAX_STEP "max-step"

42 bool game_init()

43 {

44 init_opengl();

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

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

48 return false;

49 }

50 con.set_font(con_font, 14);

51 con.set_size(7, 52);

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

53 con.set_command_func(con_handle);

54 con.set_echo(false);

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

58 return false;

59 }

61 glEnable(GL_DEPTH_TEST);

62 glEnable(GL_CULL_FACE);

63 glEnable(GL_LIGHTING);

65 unsigned char chess_pixels[] = {

66 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0x00, 0xff,

67 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0x00, 0xff

68 };

69 glGenTextures(1, &chess_tex);

70 glBindTexture(GL_TEXTURE_2D, chess_tex);

71 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

72 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

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

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

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

77 return false;

78 }

80 /* initialize all option variables */

81 set_gvar_bool(GVAR_LOOK_WALK, true);

82 set_gvar_num(GVAR_MAX_STEP, 0.5);

84 return true;

85 }

87 void game_cleanup()

88 {

89 vr_shutdown();

90 }

92 void game_update(long tm)

93 {

94 static long prev_upd;

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

96 prev_upd = tm;

98 if(con.is_visible()) {

99 con.update();

100 return;

101 }

102

103 float offs = dt * 5.0;

104 Vector3 dir;

105

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

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

108 }

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

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

111 }

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

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

114 }

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

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

117 }

118

119 if(get_gvar_bool(GVAR_LOOK_WALK)) {

120 float rot[4];

121 vr_view_rotation(0, rot);

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

123

124 dir.transform(q);

125 }

126

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

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

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

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

131

132 float max_step = get_gvar_num(GVAR_MAX_STEP);

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

134 }

135

136 void game_display()

137 {

138 glBindFramebuffer(GL_FRAMEBUFFER, fbo);

139 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

140

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

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

143 vr_begin(i);

144

145 float proj[16];

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

147 glMatrixMode(GL_PROJECTION);

148 glLoadMatrixf(proj);

149 }

150

151 glMatrixMode(GL_MODELVIEW);

152

153 float view[16];

154 vr_view_matrix(i, view);

155 glLoadMatrixf(view);

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

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

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

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

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

161

162 draw_scene();

163 con.draw();

164

165 vr_end();

166 }

167

168 glBindFramebuffer(GL_FRAMEBUFFER, 0);

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

170

171 vr_swap_buffers();

172 assert(glGetError() == GL_NO_ERROR);

173 }

174

175 void game_reshape(int x, int y)

176 {

177 win_width = x;

178 win_height = y;

179

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

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

182

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

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

185 glMatrixMode(GL_PROJECTION);

186 glLoadIdentity();

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

188 }

189

190 void game_keyboard(int key, bool pressed)

191 {

192 if(pressed) {

193 if(con.is_visible()) {

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

195 con.hide();

196 } else {

197 con.input_key(key);

198 }

199 } else {

200 switch(key) {

201 case 27:

202 exit_game();

203 break;

204

205 case 'f':

206 toggle_hmd_fullscr();

207 break;

208

209 case 'r':

210 vr_recenter();

211 break;

212

213 case '`':

214 con.show();

215 break;

216

217 default:

218 break;

219 }

220 }

221 }

222

223 if(key < 256) {

224 keystate[key] = pressed;

225 }

226 }

227

228

229 static int prev_x, prev_y;

230 static bool bnstate[32];

231

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

233 {

234 bnstate[bn] = state;

235 prev_x = x;

236 prev_y = y;

237 }

238

239 void game_mouse_motion(int x, int y)

240 {

241 int dx = x - prev_x;

242 int dy = y - prev_y;

243 prev_x = x;

244 prev_y = y;

245

246 if(!dx && !dy) {

247 return;

248 }

249 if(bnstate[0]) {

250 cam_theta += dx * 0.5;

251 cam_phi += dy * 0.5;

252

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

254 if(cam_phi > 90) cam_phi = 90;

255 }

256 }

257

258 MeshFace dbg_walk_face;

259

260 static void draw_scene()

261 {

262 float lpos[][4] = {

263 {-0.7, 0.7, 1, 0},

264 {1, 0, 1, 0}

265 };

266 float lcol[][4] = {

267 {0.9, 0.7, 0.6, 1},

268 {0.3, 0.4, 0.75, 1}

269 };

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

271 glEnable(GL_LIGHT0 + i);

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

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

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

275 }

276

277 glMatrixMode(GL_MODELVIEW);

278

279 /*

280 glBindTexture(GL_TEXTURE_2D, chess_tex);

281 glEnable(GL_TEXTURE_2D);

282 material(1, 1, 1, 1);

283 glBegin(GL_QUADS);

284 glNormal3f(0, 1, 0);

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

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

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

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

289 glEnd();

290 glDisable(GL_TEXTURE_2D);

291 */

292

293 /*material(1, 1, 1, 0.4);

294 glPushMatrix();

295 glTranslatef(0, 1.3, -10);

296 glFrontFace(GL_CW);

297 bezier_teapot(2.0);

298 glFrontFace(GL_CCW);

299 glPopMatrix();*/

300

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

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

303 }

304

305 glPushAttrib(GL_ENABLE_BIT);

306 glDisable(GL_DEPTH_TEST);

307 glDisable(GL_LIGHTING);

308

309 glBegin(GL_TRIANGLES);

310 glColor3f(0, 1, 0);

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

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

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

314 glColor3f(1, 1, 1);

315 glEnd();

316

317 glPopAttrib();

318 }

319

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

321 {

322 float gloss = 1.0 - roughness;

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

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

325 float shin = gloss * 128.0;

326

327 glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, diffuse);

328 glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, specular);

329 glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, shin);

330 }

331

332

333 static void toggle_hmd_fullscr()

334 {

335 static bool fullscr;

336 static int prev_x, prev_y;

337 //static int prev_xsz, prev_ysz;

338

339 fullscr = !fullscr;

340 if(fullscr) {

341 /* entering fullscreen on the HMD */

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

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

344 if(xoffs != -1) {

345 get_window_pos(&prev_x, &prev_y);

346 move_window(xoffs, yoffs);

347 }

348

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

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

351 if(xsz != -1) {

352 //prev_xsz = win_width;

353 //prev_ysz = win_height;

354 resize_window(xsz, ysz);

355 }

356 enter_fullscreen();

357

358 } else {

359 /* leaving fullscreen */

360 leave_fullscreen();

361 /*move_window(prev_x, prev_y);

362 resize_window(prev_xsz, prev_ysz);*/

363 }

364 }

365

366 static void create_rtarg(int x, int y)

367 {

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

369 return; // nothing changed

370 }

371

372 fb_xsz = x;

373 fb_ysz = y;

374 fb_tex_xsz = next_pow2(fb_xsz);

375 fb_tex_ysz = next_pow2(fb_ysz);

376

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

378

379 if(!fbo) {

380 glGenFramebuffers(1, &fbo);

381

382 glGenTextures(1, &fb_tex);

383 glBindTexture(GL_TEXTURE_2D, fb_tex);

384 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

385 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

386

387 glGenRenderbuffers(1, &fb_depth);

388 }

389

390 glBindFramebuffer(GL_FRAMEBUFFER, fbo);

391

392 glBindTexture(GL_TEXTURE_2D, fb_tex);

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

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

395

396 glBindRenderbuffer(GL_RENDERBUFFER, fb_depth);

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

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

399

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

401 glBindFramebuffer(GL_FRAMEBUFFER, 0);

402 }

403

404 static int next_pow2(int x)

405 {

406 x -= 1;

407 x |= x >> 1;

408 x |= x >> 2;

409 x |= x >> 4;

410 x |= x >> 8;

411 x |= x >> 16;

412 return x + 1;

413 }

414

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

416 {

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

418 return str;

419 }

420

421 struct Variable {

422 const char *var;

423 enum { BOOL, NUM } type;

424 bool bool_val;

425 float num_val;

426 };

427

428 static void con_handle(const char *cmd)

429 {

430 /* set debug values */

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

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

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

434

435 std::vector<char*> argv;

436 cmd = strip_spaces(cmd);

437

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

439 return;

440 }

441

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

443 strcpy(line, cmd);

444

445 char *tok = 0;

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

447 argv.push_back(tok);

448 }

449

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

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

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

453 return;

454 }

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

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

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

458 } else {

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

460 }

461 set_gvar_parse(argv[1], argv[2]);

462

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

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

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

466 return;

467 }

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

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

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

471 }

472

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

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

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

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

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

478 }

479

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

481 exit_game();

482

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

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

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

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

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

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

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

490

491 } else {

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

493 }

494 }