conworlds: 782ff06817fb src/game.cc

conworlds

view src/game.cc @ 20:782ff06817fb

merged ...

author	John Tsiombikas <nuclear@member.fsf.org>
date	Tue, 26 Aug 2014 18:42:53 +0300
parents	e4257df067a1 c814f77d177e
children

line source

1 #include <math.h>

2 #include "game.h"

3 #include "gameopt.h"

4 #include "opengl.h"

5 #include "camera.h"

6 #include "texture.h"

7 #include "vr/vr.h"

9 static void game_render_eye(int eye);

10 static void draw_scene();

11 static bool setup_rtarg(int x, int y);

12 static void draw_box(float sz);

13 static void draw_pyramid(float basesz, float height);

16 static Texture *rtarg;

17 static unsigned int fbo, rtarg_depth;

18 static int rtwidth, rtheight;

20 static const float move_speed = 10.0f;

22 static int fb_width, fb_height;

23 static FlyCamera cam;

24 static Texture floor_tex;

25 static bool keystate[256];

26 static float player_height = 1.68;

28 bool game_init()

29 {

30 if(opt.vr) {

31 vr_init();

32 if(opt.vr_module) {

33 vr_use_module_named(opt.vr_module);

34 }

36 player_height = vr_get_optf(VR_OPT_EYE_HEIGHT);

37 }

39 glEnable(GL_DEPTH_TEST);

40 glEnable(GL_CULL_FACE);

41 glEnable(GL_LIGHTING);

42 glEnable(GL_LIGHT0);

43 glEnable(GL_NORMALIZE);

45 glClearColor(0.1, 0.1, 0.1, 1);

48 if(!floor_tex.load("data/tiles.png")) {

49 return false;

50 }

52 cam.input_move(0, player_height, 0);

53 return true;

54 }

56 void game_cleanup()

57 {

58 floor_tex.destroy();

59 if(opt.vr) {

60 vr_shutdown();

61 }

63 if(fbo) {

64 glDeleteFramebuffers(1, &fbo);

65 glDeleteRenderbuffers(1, &rtarg_depth);

66 delete rtarg;

67 }

68 }

70 void game_update(unsigned int msec)

71 {

72 static unsigned int prev_msec;

73 float dt = (msec - prev_msec) / 1000.0f;

74 float offs = dt * move_speed;

75 prev_msec = msec;

77 Vector3 move;

78 float roll = 0.0f;

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

81 move.x += offs;

82 }

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

84 move.x -= offs;

85 }

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

87 move.z += offs;

88 }

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

90 move.z -= offs;

91 }

92 if(keystate['e'] || keystate['E']) {

93 roll += dt;

94 }

95 if(keystate['q'] || keystate['Q']) {

96 roll -= dt;

97 }

99 cam.input_move(move.x, move.y, move.z);

100 cam.input_rotate(0, 0, roll);

101 }

102

103 void game_render()

104 {

105 if(opt.vr) {

106 glBindFramebuffer(GL_FRAMEBUFFER, fbo);

107 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

108

109 glViewport(0, 0, rtwidth / 2.0, rtheight);

110 vr_begin(VR_EYE_LEFT);

111 game_render_eye(-1);

112 vr_end();

113

114 glViewport(rtwidth / 2, 0, rtwidth / 2.0, rtheight);

115 vr_begin(VR_EYE_RIGHT);

116 game_render_eye(1);

117 vr_end();

118

119 glBindFramebuffer(GL_FRAMEBUFFER, 0);

120 glViewport(0, 0, fb_width, fb_height);

121

122 vr_output_texture(rtarg->get_texture_id(), 0, 0, (float)rtwidth / (float)rtarg->get_width(),

123 (float)rtheight / (float)rtarg->get_height());

124 } else {

125 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

126

127 game_render_eye(0);

128 }

129

130 vr_swap_buffers();

131 }

132

133 static void game_render_eye(int eye)

134 {

135 float mat[16];

136 Matrix4x4 view_matrix = cam.get_matrix().inverse();

137

138 glMatrixMode(GL_PROJECTION);

139 glLoadIdentity();

140 if(eye == 0 || !vr_proj_matrix(eye < 0 ? 0 : 1, 0.5, 500.0, mat)) {

141 gluPerspective(60.0, (float)fb_width / (float)fb_height, 0.5, 500.0);

142 } else {

143 glLoadMatrixf(mat);

144 }

145

146 glMatrixMode(GL_MODELVIEW);

147 if(eye == 0 || !vr_view_matrix(eye < 0 ? 0 : 1, mat)) {

148 glLoadIdentity();

149 } else {

150 glLoadMatrixf(mat);

151 }

152 glMultTransposeMatrixf(view_matrix[0]);

153

154 draw_scene();

155 }

156

157 void game_reshape(int x, int y)

158 {

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

160 fb_width = x;

161 fb_height = y;

162

163 int lxres = vr_get_opti(VR_OPT_LEYE_XRES);

164 if(lxres) {

165 int lyres = vr_get_opti(VR_OPT_LEYE_YRES);

166 int rxres = vr_get_opti(VR_OPT_REYE_XRES);

167 int ryres = vr_get_opti(VR_OPT_REYE_YRES);

168

169 rtwidth = lxres + rxres;

170 rtheight = lyres > ryres ? lyres : ryres;

171 } else {

172 rtwidth = x;

173 rtheight = y;

174 }

175

176 setup_rtarg(rtwidth, rtheight);

177 }

178

179 void game_keyboard(int key, bool pressed)

180 {

181 if(pressed) {

182 switch(key) {

183 case 27:

184 exit(0);

185

186 case ' ':

187 vr_recenter();

188 break;

189 }

190 }

191

192 if(key < 256) {

193 keystate[key] = pressed;

194 }

195 }

196

197 static int prev_x, prev_y;

198 static bool bnstate[32];

199

200 void game_mouse(int bn, bool pressed, int x, int y)

201 {

202 bnstate[bn] = pressed;

203 prev_x = x;

204 prev_y = y;

205 }

206

207 void game_motion(int x, int y)

208 {

209 int dx = x - prev_x;

210 int dy = y - prev_y;

211 prev_x = x;

212 prev_y = y;

213

214 if(!dx && !dy) return;

215

216 if(bnstate[0]) {

217 float xrot = dy * 0.5;

218 float yrot = dx * 0.5;

219 cam.input_rotate(DEG_TO_RAD(xrot), 0, 0);

220 cam.input_rotate(0, DEG_TO_RAD(yrot), 0);

221 }

222 }

223

224 void game_mwheel(int dir)

225 {

226 cam.input_move(0, dir * 0.1, 0);

227 }

228

229 void game_6dof_move(float x, float y, float z)

230 {

231 cam.input_move(x, y, z);

232 }

233

234 void game_6dof_rotate(float x, float y, float z)

235 {

236 cam.input_rotate(x, y, z);

237 }

238

239 static void draw_scene()

240 {

241 float lpos[] = {-20, 30, 10, 1};

242 glLightfv(GL_LIGHT0, GL_POSITION, lpos);

243

244 glEnable(GL_TEXTURE_2D);

245 bind_texture(&floor_tex);

246

247 glMatrixMode(GL_TEXTURE);

248 glScalef(8, 8, 8);

249

250 glBegin(GL_QUADS);

251 glNormal3f(0, 1, 0);

252 glTexCoord2f(0, 0); glVertex3f(-25, 0, 25);

253 glTexCoord2f(1, 0); glVertex3f(25, 0, 25);

254 glTexCoord2f(1, 1); glVertex3f(25, 0, -25);

255 glTexCoord2f(0, 1); glVertex3f(-25, 0, -25);

256 glEnd();

257 glDisable(GL_TEXTURE_2D);

258 glLoadIdentity();

259

260 glMatrixMode(GL_MODELVIEW);

261

262 for(int i=0; i<4; i++) {

263 glPushMatrix();

264 glTranslatef(i & 1 ? -10 : 10, 0, i & 2 ? -10 : 10);

265 draw_pyramid(2.0, 2.0);

266 glPopMatrix();

267 }

268 }

269

270 static bool setup_rtarg(int x, int y)

271 {

272 int tex_width = next_pow2(x);

273 int tex_height = next_pow2(y);

274

275 /* create render targets for each eye */

276 if(!fbo) {

277 glGenFramebuffers(1, &fbo);

278 glGenRenderbuffers(1, &rtarg_depth);

279 rtarg = new Texture;

280 }

281

282 glBindFramebuffer(GL_FRAMEBUFFER, fbo);

283

284 glBindRenderbuffer(GL_RENDERBUFFER, rtarg_depth);

285 glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, tex_width, tex_height);

286 glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rtarg_depth);

287

288 rtarg->create2d(tex_width, tex_height);

289 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,

290 rtarg->get_texture_id(), 0);

291

292 if(glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {

293 fprintf(stderr, "incomplete framebuffer!\n");

294 return false;

295 }

296 glBindFramebuffer(GL_FRAMEBUFFER, 0);

297

298 printf("created render target %dx%d (texture: %dx%d)\n", x, y, tex_width, tex_height);

299 return true;

300 }

301

302 static void draw_box(float sz)

303 {

304 float hsz = sz / 2.0;

305

306 glBegin(GL_QUADS);

307 glNormal3f(0, 0, 1);

308 glVertex3f(-hsz, -hsz, hsz);

309 glVertex3f(hsz, -hsz, hsz);

310 glVertex3f(hsz, hsz, hsz);

311 glVertex3f(-hsz, hsz, hsz);

312 glNormal3f(1, 0, 0);

313 glVertex3f(hsz, -hsz, hsz);

314 glVertex3f(hsz, -hsz, -hsz);

315 glVertex3f(hsz, hsz, -hsz);

316 glVertex3f(hsz, hsz, hsz);

317 glNormal3f(0, 0, -1);

318 glVertex3f(hsz, -hsz, -hsz);

319 glVertex3f(-hsz, -hsz, -hsz);

320 glVertex3f(-hsz, hsz, -hsz);

321 glVertex3f(hsz, hsz, -hsz);

322 glNormal3f(-1, 0, 0);

323 glVertex3f(-hsz, -hsz, -hsz);

324 glVertex3f(-hsz, -hsz, hsz);

325 glVertex3f(-hsz, hsz, hsz);

326 glVertex3f(-hsz, hsz, -hsz);

327 glNormal3f(0, 1, 0);

328 glVertex3f(-hsz, hsz, hsz);

329 glVertex3f(hsz, hsz, hsz);

330 glVertex3f(hsz, hsz, -hsz);

331 glVertex3f(-hsz, hsz, -hsz);

332 glNormal3f(0, -1, 0);

333 glVertex3f(-hsz, -hsz, -hsz);

334 glVertex3f(hsz, -hsz, -hsz);

335 glVertex3f(hsz, -hsz, hsz);

336 glVertex3f(-hsz, -hsz, hsz);

337 glEnd();

338 }

339

340 static void draw_pyramid(float basesz, float height)

341 {

342 float hsz = basesz / 2.0;

343 float theta = atan(hsz / height);

344 float nx = cos(theta);

345 float ny = sin(theta);

346

347 glBegin(GL_TRIANGLES);

348 glNormal3f(0, ny, nx);

349 glVertex3f(-hsz, 0, hsz);

350 glVertex3f(hsz, 0, hsz);

351 glVertex3f(0, height, 0);

352 glNormal3f(nx, ny, 0);

353 glVertex3f(hsz, 0, hsz);

354 glVertex3f(hsz, 0, -hsz);

355 glVertex3f(0, height, 0);

356 glNormal3f(0, ny, -nx);

357 glVertex3f(hsz, 0, -hsz);

358 glVertex3f(-hsz, 0, -hsz);

359 glVertex3f(0, height, 0);

360 glNormal3f(-nx, ny, 0);

361 glVertex3f(-hsz, 0, -hsz);

362 glVertex3f(-hsz, 0, hsz);

363 glVertex3f(0, height, 0);

364 glEnd();

365 }