vrheights: df3a70664a7d src/game.cc

vrheights

view src/game.cc @ 9:df3a70664a7d

falling

author	John Tsiombikas <nuclear@member.fsf.org>
date	Fri, 03 Oct 2014 20:36:24 +0300
parents	3f221bdc9bab
children	3e6757655fe2

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 }

144 }

145 }

146

147 void game_display()

148 {

149 glBindFramebuffer(GL_FRAMEBUFFER, fbo);

150 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

151

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

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

154 vr_begin(i);

155

156 float proj[16];

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

158 glMatrixMode(GL_PROJECTION);

159 glLoadMatrixf(proj);

160 }

161

162 glMatrixMode(GL_MODELVIEW);

163

164 float view[16];

165 vr_view_matrix(i, view);

166 glLoadMatrixf(view);

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

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

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

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

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

172

173 draw_scene();

174 con.draw();

175

176 vr_end();

177 }

178

179 glBindFramebuffer(GL_FRAMEBUFFER, 0);

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

181

182 vr_swap_buffers();

183 assert(glGetError() == GL_NO_ERROR);

184 }

185

186 void game_reshape(int x, int y)

187 {

188 win_width = x;

189 win_height = y;

190

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

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

193

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

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

196 glMatrixMode(GL_PROJECTION);

197 glLoadIdentity();

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

199 }

200

201 void game_keyboard(int key, bool pressed)

202 {

203 if(pressed) {

204 if(con.is_visible()) {

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

206 con.hide();

207 } else {

208 con.input_key(key);

209 }

210 } else {

211 switch(key) {

212 case 27:

213 exit_game();

214 break;

215

216 case 'f':

217 toggle_hmd_fullscr();

218 break;

219

220 case 'r':

221 vr_recenter();

222 break;

223

224 case '`':

225 con.show();

226 break;

227

228 default:

229 break;

230 }

231 }

232 }

233

234 if(key < 256) {

235 keystate[key] = pressed;

236 }

237 }

238

239

240 static int prev_x, prev_y;

241 static bool bnstate[32];

242

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

244 {

245 bnstate[bn] = state;

246 prev_x = x;

247 prev_y = y;

248 }

249

250 void game_mouse_motion(int x, int y)

251 {

252 int dx = x - prev_x;

253 int dy = y - prev_y;

254 prev_x = x;

255 prev_y = y;

256

257 if(!dx && !dy) {

258 return;

259 }

260 if(bnstate[0]) {

261 cam_theta += dx * 0.5;

262 cam_phi += dy * 0.5;

263

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

265 if(cam_phi > 90) cam_phi = 90;

266 }

267 }

268

269 MeshFace dbg_walk_face;

270

271 static void draw_scene()

272 {

273 float lpos[][4] = {

274 {-0.7, 0.7, 1, 0},

275 {1, 0, 1, 0}

276 };

277 float lcol[][4] = {

278 {0.9, 0.7, 0.6, 1},

279 {0.3, 0.4, 0.75, 1}

280 };

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

282 glEnable(GL_LIGHT0 + i);

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

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

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

286 }

287

288 glMatrixMode(GL_MODELVIEW);

289

290 /*

291 glBindTexture(GL_TEXTURE_2D, chess_tex);

292 glEnable(GL_TEXTURE_2D);

293 material(1, 1, 1, 1);

294 glBegin(GL_QUADS);

295 glNormal3f(0, 1, 0);

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

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

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

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

300 glEnd();

301 glDisable(GL_TEXTURE_2D);

302 */

303

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

305 glPushMatrix();

306 glTranslatef(0, 1.3, -10);

307 glFrontFace(GL_CW);

308 bezier_teapot(2.0);

309 glFrontFace(GL_CCW);

310 glPopMatrix();*/

311

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

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

314 }

315

316 glPushAttrib(GL_ENABLE_BIT);

317 glDisable(GL_DEPTH_TEST);

318 glDisable(GL_LIGHTING);

319

320 glBegin(GL_TRIANGLES);

321 glColor3f(0, 1, 0);

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

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

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

325 glColor3f(1, 1, 1);

326 glEnd();

327

328 glPopAttrib();

329 }

330

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

332 {

333 float gloss = 1.0 - roughness;

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

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

336 float shin = gloss * 128.0;

337

338 glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, diffuse);

339 glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, specular);

340 glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, shin);

341 }

342

343

344 static void toggle_hmd_fullscr()

345 {

346 static bool fullscr;

347 static int prev_x, prev_y;

348 //static int prev_xsz, prev_ysz;

349

350 fullscr = !fullscr;

351 if(fullscr) {

352 /* entering fullscreen on the HMD */

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

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

355 if(xoffs != -1) {

356 get_window_pos(&prev_x, &prev_y);

357 move_window(xoffs, yoffs);

358 }

359

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

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

362 if(xsz != -1) {

363 //prev_xsz = win_width;

364 //prev_ysz = win_height;

365 resize_window(xsz, ysz);

366 }

367 enter_fullscreen();

368

369 } else {

370 /* leaving fullscreen */

371 leave_fullscreen();

372 /*move_window(prev_x, prev_y);

373 resize_window(prev_xsz, prev_ysz);*/

374 }

375 }

376

377 static void create_rtarg(int x, int y)

378 {

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

380 return; // nothing changed

381 }

382

383 fb_xsz = x;

384 fb_ysz = y;

385 fb_tex_xsz = next_pow2(fb_xsz);

386 fb_tex_ysz = next_pow2(fb_ysz);

387

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

389

390 if(!fbo) {

391 glGenFramebuffers(1, &fbo);

392

393 glGenTextures(1, &fb_tex);

394 glBindTexture(GL_TEXTURE_2D, fb_tex);

395 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

396 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

397

398 glGenRenderbuffers(1, &fb_depth);

399 }

400

401 glBindFramebuffer(GL_FRAMEBUFFER, fbo);

402

403 glBindTexture(GL_TEXTURE_2D, fb_tex);

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

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

406

407 glBindRenderbuffer(GL_RENDERBUFFER, fb_depth);

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

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

410

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

412 glBindFramebuffer(GL_FRAMEBUFFER, 0);

413 }

414

415 static int next_pow2(int x)

416 {

417 x -= 1;

418 x |= x >> 1;

419 x |= x >> 2;

420 x |= x >> 4;

421 x |= x >> 8;

422 x |= x >> 16;

423 return x + 1;

424 }

425

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

427 {

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

429 return str;

430 }

431

432 struct Variable {

433 const char *var;

434 enum { BOOL, NUM } type;

435 bool bool_val;

436 float num_val;

437 };

438

439 static void con_handle(const char *cmd)

440 {

441 /* set debug values */

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

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

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

445

446 std::vector<char*> argv;

447 cmd = strip_spaces(cmd);

448

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

450 return;

451 }

452

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

454 strcpy(line, cmd);

455

456 char *tok = 0;

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

458 argv.push_back(tok);

459 }

460

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

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

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

464 return;

465 }

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

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

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

469 } else {

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

471 }

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

473

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

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

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

477 return;

478 }

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

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

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

482 }

483

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

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

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

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

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

489 }

490

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

492 exit_game();

493

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

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

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

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

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

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

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

501

502 } else {

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

504 }

505 }