vrheights: 608e03b688f8 src/game.cc

vrheights

view src/game.cc @ 6:608e03b688f8

foo

author	John Tsiombikas <nuclear@member.fsf.org>
date	Tue, 30 Sep 2014 18:57:20 +0300
parents	053a52f0cb64
children	0eca023ed909

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"

13 static void draw_scene();

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

15 static void toggle_hmd_fullscr();

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

17 static int next_pow2(int x);

18 static void con_handle(const char *cmd);

20 bool opt_separate_walk_look;

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, cam_phi;

31 static Vector3 cam_pos;

32 static bool keystate[256];

34 static Console con;

35 static dtx_font *con_font;

37 bool game_init()

38 {

39 init_opengl();

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

42 return false;

43 }

45 glEnable(GL_DEPTH_TEST);

46 glEnable(GL_CULL_FACE);

47 glEnable(GL_LIGHTING);

49 unsigned char chess_pixels[] = {

50 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0x00, 0xff,

51 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0x00, 0xff

52 };

53 glGenTextures(1, &chess_tex);

54 glBindTexture(GL_TEXTURE_2D, chess_tex);

55 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

56 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

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

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

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

61 return false;

62 }

63 con.set_font(con_font, 14);

64 con.set_size(7, 40);

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

66 con.set_command_func(con_handle);

68 return true;

69 }

71 void game_cleanup()

72 {

73 vr_shutdown();

74 }

76 void game_update(long tm)

77 {

78 static long prev_upd;

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

80 prev_upd = tm;

82 if(con.is_visible()) {

83 con.update();

84 return;

85 }

87 float offs = dt * 5.0;

88 Vector3 dir;

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

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

92 }

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

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

95 }

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

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

98 }

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

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

101 }

102

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

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

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

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

107

108 if(!opt_separate_walk_look) {

109 float rot[4];

110 vr_view_rotation(0, rot);

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

112

113 cam_pos.transform(q);

114 }

115 }

116

117 void game_display()

118 {

119 glBindFramebuffer(GL_FRAMEBUFFER, fbo);

120 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

121

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

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

124 vr_begin(i);

125

126 float proj[16];

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

128 glMatrixMode(GL_PROJECTION);

129 glLoadMatrixf(proj);

130 }

131

132 glMatrixMode(GL_MODELVIEW);

133

134 float view[16];

135 vr_view_matrix(i, view);

136 glLoadMatrixf(view);

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

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

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

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

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

142

143 draw_scene();

144 con.draw();

145

146 vr_end();

147 }

148

149 glBindFramebuffer(GL_FRAMEBUFFER, 0);

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

151

152 vr_swap_buffers();

153 assert(glGetError() == GL_NO_ERROR);

154 }

155

156 void game_reshape(int x, int y)

157 {

158 win_width = x;

159 win_height = y;

160

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

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

163

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

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

166 glMatrixMode(GL_PROJECTION);

167 glLoadIdentity();

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

169 }

170

171 void game_keyboard(int key, bool pressed)

172 {

173 if(pressed) {

174 if(con.is_visible()) {

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

176 con.hide();

177 } else {

178 con.input_key(key);

179 }

180 } else {

181 switch(key) {

182 case 27:

183 exit_game();

184 break;

185

186 case 'f':

187 toggle_hmd_fullscr();

188 break;

189

190 case 'r':

191 vr_recenter();

192 break;

193

194 case '`':

195 con.show();

196 break;

197

198 default:

199 break;

200 }

201 }

202 }

203

204 if(key < 256) {

205 keystate[key] = pressed;

206 }

207 }

208

209

210 static int prev_x, prev_y;

211 static bool bnstate[32];

212

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

214 {

215 bnstate[bn] = state;

216 prev_x = x;

217 prev_y = y;

218 }

219

220 void game_mouse_motion(int x, int y)

221 {

222 int dx = x - prev_x;

223 int dy = y - prev_y;

224 prev_x = x;

225 prev_y = y;

226

227 if(!dx && !dy) {

228 return;

229 }

230 if(bnstate[0]) {

231 cam_theta += dx * 0.5;

232 cam_phi += dy * 0.5;

233

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

235 if(cam_phi > 90) cam_phi = 90;

236 }

237 }

238

239 static void draw_scene()

240 {

241 float lpos[][4] = {

242 {-0.7, 0.7, 1, 0},

243 {1, 0, 1, 0}

244 };

245 float lcol[][4] = {

246 {0.9, 0.7, 0.6, 1},

247 {0.3, 0.4, 0.75, 1}

248 };

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

250 glEnable(GL_LIGHT0 + i);

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

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

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

254 }

255

256 glMatrixMode(GL_MODELVIEW);

257

258 glBindTexture(GL_TEXTURE_2D, chess_tex);

259 glEnable(GL_TEXTURE_2D);

260 material(1, 1, 1, 1);

261 glBegin(GL_QUADS);

262 glNormal3f(0, 1, 0);

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

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

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

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

267 glEnd();

268 glDisable(GL_TEXTURE_2D);

269

270 material(1, 1, 1, 0.4);

271 glPushMatrix();

272 glTranslatef(0, 1.3, -10);

273 glFrontFace(GL_CW);

274 bezier_teapot(2.0);

275 glFrontFace(GL_CCW);

276 glPopMatrix();

277 }

278

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

280 {

281 float gloss = 1.0 - roughness;

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

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

284 float shin = gloss * 128.0;

285

286 glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, diffuse);

287 glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, specular);

288 glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, shin);

289 }

290

291

292 static void toggle_hmd_fullscr()

293 {

294 static bool fullscr;

295 static int prev_x, prev_y;

296 //static int prev_xsz, prev_ysz;

297

298 fullscr = !fullscr;

299 if(fullscr) {

300 /* entering fullscreen on the HMD */

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

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

303 if(xoffs != -1) {

304 get_window_pos(&prev_x, &prev_y);

305 move_window(xoffs, yoffs);

306 }

307

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

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

310 if(xsz != -1) {

311 //prev_xsz = win_width;

312 //prev_ysz = win_height;

313 resize_window(xsz, ysz);

314 }

315 enter_fullscreen();

316

317 } else {

318 /* leaving fullscreen */

319 leave_fullscreen();

320 /*move_window(prev_x, prev_y);

321 resize_window(prev_xsz, prev_ysz);*/

322 }

323 }

324

325 static void create_rtarg(int x, int y)

326 {

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

328 return; // nothing changed

329 }

330

331 fb_xsz = x;

332 fb_ysz = y;

333 fb_tex_xsz = next_pow2(fb_xsz);

334 fb_tex_ysz = next_pow2(fb_ysz);

335

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

337

338 if(!fbo) {

339 glGenFramebuffers(1, &fbo);

340

341 glGenTextures(1, &fb_tex);

342 glBindTexture(GL_TEXTURE_2D, fb_tex);

343 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

344 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

345

346 glGenRenderbuffers(1, &fb_depth);

347 }

348

349 glBindFramebuffer(GL_FRAMEBUFFER, fbo);

350

351 glBindTexture(GL_TEXTURE_2D, fb_tex);

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

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

354

355 glBindRenderbuffer(GL_RENDERBUFFER, fb_depth);

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

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

358

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

360 glBindFramebuffer(GL_FRAMEBUFFER, 0);

361 }

362

363 static int next_pow2(int x)

364 {

365 x -= 1;

366 x |= x >> 1;

367 x |= x >> 2;

368 x |= x >> 4;

369 x |= x >> 8;

370 x |= x >> 16;

371 return x + 1;

372 }

373

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

375 {

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

377 return str;

378 }

379

380 static void con_handle(const char *cmd)

381 {

382 std::vector<char*> argv;

383 cmd = strip_spaces(cmd);

384

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

386 return;

387 }

388

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

390 strcpy(line, cmd);

391

392 char *tok = 0;

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

394 argv.push_back(tok);

395 }

396

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

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

399 fprintf(stderr, "set must be followed by 2 arguments\n");

400 return;

401 }

402 if(strcmp(argv[1], "separate-walk") == 0) {

403 if(strcmp(argv[2], "true") == 0) {

404 opt_separate_walk_look = true;

405 } else if(strcmp(argv[2], "false") == 0) {

406 opt_separate_walk_look = false;

407 }

408 } else {

409 con.printf("unknown option: %s\n", argv[1]);

410 }

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

412 exit_game();

413 } else {

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

415 }

416 }