labyrinth: 45b91185b298 src/game.c

labyrinth

view src/game.c @ 3:45b91185b298

android port

author	John Tsiombikas <nuclear@member.fsf.org>
date	Fri, 01 May 2015 04:36:50 +0300
parents
children	d3f1f74067b0

line source

1 #include <stdio.h>

2 #include <stdlib.h>

3 #include <math.h>

4 #include "opengl.h"

5 #include "game.h"

6 #include "player.h"

7 #include "level.h"

8 #include "noise.h"

9 #include "texture.h"

10 #include "mesh.h"

12 #define PLAYER_EYE_HEIGHT 1.65

14 static void draw_scene(unsigned long msec);

16 static int win_width, win_height;

17 static struct level level;

18 static struct player player;

19 static int mouselook, freelook = 1;

20 static char keystate[256];

22 static struct mesh *monkey_mesh;

23 static unsigned int envmap;

24 static unsigned int win_tex;

26 static int game_won;

28 static float dbg_cam_dist = 0.0;

31 int game_init(void)

32 {

33 glEnable(GL_DEPTH_TEST);

34 glEnable(GL_CULL_FACE);

35 glEnable(GL_LIGHTING);

36 glEnable(GL_NORMALIZE);

38 glEnable(GL_LIGHT0);

39 glEnable(GL_LIGHT1);

41 /* set a slightly bluish cold ambient light */

42 {

43 float ambient[] = {0.08, 0.1, 0.3, 1.0};

44 glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);

45 }

47 level_init(&level);

48 if(level_load(&level, "data/0.level") == -1) {

49 fprintf(stderr, "level loading failed\n");

50 return -1;

51 }

53 if(!(level.wall_tex = load_texture("data/wall.ppm"))) {

54 return -1;

55 }

56 if(!(level.floor_tex = load_texture("data/floor.ppm"))) {

57 return -1;

58 }

59 level.floor_tex_scale = 1.0;

60 if(!(level.ceil_tex = load_texture("data/ceil.ppm"))) {

61 return -1;

62 }

63 level.ceil_tex_scale = 2.0;

66 if(!(monkey_mesh = load_mesh("data/monkey.obj"))) {

67 return -1;

68 }

69 if(!(envmap = load_texture("data/refmap.ppm"))) {

70 return -1;

71 }

73 if(!(win_tex = load_texture("data/done.ppm"))) {

74 return -1;

75 }

77 player_init(&player, &level);

78 return 0;

79 }

81 void game_shutdown(void)

82 {

83 }

85 static void update(unsigned long msec)

86 {

87 static unsigned long prev_upd;

88 float dfwd = 0.0f;

89 float dright = 0.0f;

90 float walk_speed = 8.0;

92 float dt = (float)(msec - prev_upd) / 1000.0f;

93 prev_upd = msec;

95 if(game_won) return;

97 if(freelook) {

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

99 dfwd += walk_speed * dt;

100 }

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

102 dfwd -= walk_speed * dt;

103 }

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

105 dright += walk_speed * dt * 0.6;

106 }

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

108 dright -= walk_speed * dt * 0.6;

109 }

110

111 player_move(&player, dfwd, dright);

112 }

113

114 if(level_cell_at(&level, player.x, player.y) == 'x') {

115 game_won = 1;

116 }

117 }

118

119 void game_display(unsigned long msec)

120 {

121 float flicker = 1.0f;

122

123 update(msec);

124

125 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

126

127 glMatrixMode(GL_MODELVIEW);

128 glLoadIdentity();

129 glTranslatef(0, 0, -dbg_cam_dist);

130 /* set view matrix according to player pos/rot */

131 player_setup_view_matrix(&player);

132 glTranslatef(0, -PLAYER_EYE_HEIGHT, 0);

133

134 /* setup lights */

135 flicker = fbm1((float)msec / 500.0f, 2) * 0.4 + 0.6;

136 set_light_position(0, player.x, PLAYER_EYE_HEIGHT + 0.2, player.y);

137 set_light_color(0, 1.0 * flicker, 0.6 * flicker, 0.3 * flicker);

138 set_light_attenuation(0, 0.5, 0, 0.04);

139

140 set_light_position(1, level.goal_pos[0], 0.8, level.goal_pos[1]);

141 set_light_color(1, 0.955, 0.75, 0.06);

142 set_light_attenuation(1, 0.9, 0, 0.05);

143

144 /* draw the scene */

145 draw_scene(msec);

146 }

147

148 void game_reshape(int x, int y)

149 {

150 win_width = x;

151 win_height = y;

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

153 glMatrixMode(GL_PROJECTION);

154 glLoadIdentity();

155 gluPerspective(55.0, (float)x / (float)y, 0.5, 500.0);

156 }

157

158

159 static void draw_scene(unsigned long msec)

160 {

161 float x, y;

162 float tsec = (float)msec / 1000.0f;

163

164 level_draw(&level);

165

166 /* draw the golden monkey */

167 if(level_obj_pos(&level, 'x', &x, &y)) {

168 /* TODO: GLES doesn't have tex-gen... recalc manually */

169 #ifndef GL_MOBILE

170 glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);

171 glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);

172 glEnable(GL_TEXTURE_GEN_S);

173 glEnable(GL_TEXTURE_GEN_T);

174

175 glBindTexture(GL_TEXTURE_2D, envmap);

176 glEnable(GL_TEXTURE_2D);

177 #endif

178

179 set_mtl_diffuse(0.1, 0.1, 0.1, 1);

180 set_mtl_specular(0.955, 0.75, 0.06);

181 set_mtl_shininess(80.0);

182 set_mtl_emission(0.955, 0.75 * 0.7, 0.06 * 0.1);

183

184 glMatrixMode(GL_MODELVIEW);

185 glPushMatrix();

186 glTranslatef(x, 0.8 + sin(tsec * 2.0) * 0.1, y);

187 glRotatef(tsec * 100.0, 0, 1, 0);

188 glRotatef(sin(tsec * 3.0) * 10.0, 1, 0, 0);

189 glScalef(0.3, 0.3, 0.3);

190

191 render_mesh(monkey_mesh);

192

193 glPopMatrix();

194

195 set_mtl_emission(0, 0, 0);

196

197 #ifndef GL_MOBILE

198 glDisable(GL_TEXTURE_2D);

199

200 glDisable(GL_TEXTURE_GEN_S);

201 glDisable(GL_TEXTURE_GEN_T);

202 #endif

203 }

204

205 /* draw the win text */

206 if(game_won) {

207 glMatrixMode(GL_MODELVIEW);

208 glPushMatrix();

209 glLoadIdentity();

210 glMatrixMode(GL_PROJECTION);

211 glPushMatrix();

212 glLoadIdentity();

213 glScalef((float)win_height / (float)win_width, 1, 1);

214

215 glBindTexture(GL_TEXTURE_2D, win_tex);

216 glEnable(GL_TEXTURE_2D);

217

218 glEnable(GL_BLEND);

219 glBlendFunc(GL_ONE, GL_ONE);

220 glDisable(GL_LIGHTING);

221

222 glBegin(GL_QUADS);

223 glTexCoord2f(0, 1); glVertex2f(-1, -1);

224 glTexCoord2f(1, 1); glVertex2f(1, -1);

225 glTexCoord2f(1, 0); glVertex2f(1, 1);

226 glTexCoord2f(0, 0); glVertex2f(-1, 1);

227 glEnd();

228

229 glDisable(GL_BLEND);

230 glDisable(GL_TEXTURE_2D);

231 glEnable(GL_LIGHTING);

232

233 glPopMatrix();

234 glMatrixMode(GL_MODELVIEW);

235 glPopMatrix();

236 }

237 }

238

239 static int warping_mouse;

240

241 void game_keyboard(int key, int pressed)

242 {

243 keystate[key] = pressed;

244

245 if(!pressed) return;

246

247 switch(key) {

248 case 27:

249 exit(0);

250

251 case 'a':

252 if(!freelook && !game_won) {

253 player_turn(&player, -90, 0);

254 }

255 break;

256

257 case 'd':

258 if(!freelook && !game_won) {

259 player_turn(&player, 90, 0);

260 }

261 break;

262

263 case 'w':

264 case 's':

265 if(!freelook && !game_won) {

266 float prev_x = player.x;

267 float prev_y = player.y;

268 float sign = key == 'w' ? 1.0 : -1.0;

269

270 if(!player_move(&player, level.cell_size * sign, 0)) {

271 player.x = prev_x;

272 player.y = prev_y;

273 }

274 }

275 break;

276

277 case '`':

278 case '~':

279 mouselook = !mouselook;

280 if(mouselook) {

281 warping_mouse = 1;

282 set_mouse_pos(win_width / 2, win_height / 2);

283 set_mouse_cursor(0);

284 } else {

285 set_mouse_cursor(1);

286 }

287 break;

288

289 case 'b':

290 case 'B':

291 freelook = !freelook;

292 break;

293

294 case 'r':

295 case 'R':

296 game_won = 0;

297 player_init(&player, &level);

298 break;

299

300 default:

301 break;

302 }

303 }

304

305 #define MAX_TOUCH_IDS 16

306 static struct {

307 int bnstate[8];

308 int prev_x, prev_y;

309 } mstate[MAX_TOUCH_IDS];

310

311 void game_mouse_button(int id, int bn, int pressed, int x, int y)

312 {

313 if(id >= MAX_TOUCH_IDS) return;

314

315 mstate[id].prev_x = x;

316 mstate[id].prev_y = y;

317 mstate[id].bnstate[bn] = pressed;

318 }

319

320 void game_mouse_motion(int id, int x, int y)

321 {

322 int dx, dy, cx, cy;

323

324 if(id >= MAX_TOUCH_IDS) return;

325

326 cx = win_width / 2;

327 cy = win_height / 2;

328

329 if(warping_mouse) {

330 warping_mouse = 0;

331 return;

332 }

333

334 dx = x - (mouselook ? cx : mstate[id].prev_x);

335 dy = y - (mouselook ? cy : mstate[id].prev_y);

336 mstate[id].prev_x = x;

337 mstate[id].prev_y = y;

338

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

340

341 if(mouselook || mstate[id].bnstate[0]) {

342 player_turn(&player, dx * 0.5, dy * 0.5);

343 }

344 if(mstate[id].bnstate[2]) {

345 dbg_cam_dist += 0.1 * dy;

346 if(dbg_cam_dist < 0.0) dbg_cam_dist = 0.0;

347 }

348

349 if(mouselook) {

350 warping_mouse = 1;

351 set_mouse_pos(cx, cy);

352 mstate[id].prev_x = cx;

353 mstate[id].prev_y = cy;

354 }

355 }

356