labyrinth: 8ba79034e8a6 src/main.c

labyrinth

view src/main.c @ 0:8ba79034e8a6

labyrinth example initial commit

author	John Tsiombikas <nuclear@member.fsf.org>
date	Thu, 15 Jan 2015 14:59:38 +0200
parents
children	e3b9707504df

line source

1 #include <stdio.h>

2 #include <stdlib.h>

3 #include <math.h>

4 #include <assert.h>

5 #include "opengl.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 int init(void);

15 static void update(unsigned int msec);

16 static void display(void);

17 static void draw_scene(unsigned int msec);

18 static void idle(void);

19 static void reshape(int x, int y);

20 static void key_down(unsigned char key, int x, int y);

21 static void key_up(unsigned char key, int x, int y);

22 static void mouse(int bn, int state, int x, int y);

23 static void motion(int x, int y);

25 static int win_width, win_height;

26 static struct level level;

27 static struct player player;

28 static int mouselook, freelook = 1;

29 static char keystate[256];

31 static struct mesh *monkey_mesh;

32 static unsigned int envmap;

33 static unsigned int win_tex;

35 static int game_won;

37 static float dbg_cam_dist = 0.0;

39 int main(int argc, char **argv)

40 {

41 glutInit(&argc, argv);

42 glutInitWindowSize(1280, 800);

43 glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);

44 glutCreateWindow("labyrinth game example");

46 glutDisplayFunc(display);

47 glutIdleFunc(idle);

48 glutReshapeFunc(reshape);

49 glutKeyboardFunc(key_down);

50 glutKeyboardUpFunc(key_up);

51 glutMouseFunc(mouse);

52 glutMotionFunc(motion);

54 if(init() == -1) {

55 return 1;

56 }

57 glutMainLoop();

58 return 0;

59 }

62 static int init(void)

63 {

64 glEnable(GL_DEPTH_TEST);

65 glEnable(GL_CULL_FACE);

66 glEnable(GL_LIGHTING);

67 glEnable(GL_NORMALIZE);

69 glEnable(GL_LIGHT0);

70 glEnable(GL_LIGHT1);

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

73 {

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

75 glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);

76 }

78 level_init(&level);

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

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

81 return -1;

82 }

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

85 return -1;

86 }

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

88 return -1;

89 }

90 level.floor_tex_scale = 1.0;

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

92 return -1;

93 }

94 level.ceil_tex_scale = 2.0;

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

98 return -1;

99 }

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

101 return -1;

102 }

103

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

105 return -1;

106 }

107

108 player_init(&player, &level);

109 return 0;

110 }

111

112 static void update(unsigned int msec)

113 {

114 static unsigned int prev_upd;

115 float dfwd = 0.0f;

116 float dright = 0.0f;

117 float walk_speed = 8.0;

118

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

120 prev_upd = msec;

121

122 if(game_won) return;

123

124 if(freelook) {

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

126 dfwd += walk_speed * dt;

127 }

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

129 dfwd -= walk_speed * dt;

130 }

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

132 dright += walk_speed * dt * 0.6;

133 }

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

135 dright -= walk_speed * dt * 0.6;

136 }

137

138 player_move(&player, dfwd, dright);

139 }

140

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

142 game_won = 1;

143 }

144 }

145

146 static void display(void)

147 {

148 float flicker = 1.0f;

149 unsigned int msec = glutGet(GLUT_ELAPSED_TIME);

150

151 update(msec);

152

153 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

154

155 glMatrixMode(GL_MODELVIEW);

156 glLoadIdentity();

157 glTranslatef(0, 0, -dbg_cam_dist);

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

159 player_setup_view_matrix(&player);

160 glTranslatef(0, -PLAYER_EYE_HEIGHT, 0);

161

162 /* setup lights */

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

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

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

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

167

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

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

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

171

172 /* draw the scene */

173 draw_scene(msec);

174

175 glutSwapBuffers();

176 assert(glGetError() == GL_NO_ERROR);

177 }

178

179 static void draw_scene(unsigned int msec)

180 {

181 float x, y;

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

183

184 level_draw(&level);

185

186 /* draw the golden monkey */

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

188 glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);

189 glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);

190 glEnable(GL_TEXTURE_GEN_S);

191 glEnable(GL_TEXTURE_GEN_T);

192

193 glBindTexture(GL_TEXTURE_2D, envmap);

194 glEnable(GL_TEXTURE_2D);

195

196 set_mtl_diffuse(0.1, 0.1, 0.1, 1);

197 set_mtl_specular(0.955, 0.75, 0.06);

198 set_mtl_shininess(80.0);

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

200

201 glMatrixMode(GL_MODELVIEW);

202 glPushMatrix();

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

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

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

206 glScalef(0.3, 0.3, 0.3);

207

208 render_mesh(monkey_mesh);

209

210 glPopMatrix();

211

212 set_mtl_emission(0, 0, 0);

213

214 glDisable(GL_TEXTURE_2D);

215

216 glDisable(GL_TEXTURE_GEN_S);

217 glDisable(GL_TEXTURE_GEN_T);

218 }

219

220 /* draw the win text */

221 if(game_won) {

222 glMatrixMode(GL_MODELVIEW);

223 glPushMatrix();

224 glLoadIdentity();

225 glMatrixMode(GL_PROJECTION);

226 glPushMatrix();

227 glLoadIdentity();

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

229

230 glBindTexture(GL_TEXTURE_2D, win_tex);

231 glEnable(GL_TEXTURE_2D);

232

233 glEnable(GL_BLEND);

234 glBlendFunc(GL_ONE, GL_ONE);

235 glDisable(GL_LIGHTING);

236

237 glBegin(GL_QUADS);

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

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

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

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

242 glEnd();

243

244 glDisable(GL_BLEND);

245 glDisable(GL_TEXTURE_2D);

246 glEnable(GL_LIGHTING);

247

248 glPopMatrix();

249 glMatrixMode(GL_MODELVIEW);

250 glPopMatrix();

251 }

252 }

253

254 static void idle(void)

255 {

256 glutPostRedisplay();

257 }

258

259 static void reshape(int x, int y)

260 {

261 win_width = x;

262 win_height = y;

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

264 glMatrixMode(GL_PROJECTION);

265 glLoadIdentity();

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

267 }

268

269 static int warping_mouse;

270

271 static void key_down(unsigned char key, int x, int y)

272 {

273 keystate[key] = 1;

274

275 switch(key) {

276 case 27:

277 exit(0);

278

279 case 'a':

280 if(!freelook && !game_won) {

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

282 }

283 break;

284

285 case 'd':

286 if(!freelook && !game_won) {

287 player_turn(&player, 90, 0);

288 }

289 break;

290

291 case 'w':

292 case 's':

293 if(!freelook && !game_won) {

294 float prev_x = player.x;

295 float prev_y = player.y;

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

297

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

299 player.x = prev_x;

300 player.y = prev_y;

301 }

302 }

303 break;

304

305 case '`':

306 case '~':

307 mouselook = !mouselook;

308 if(mouselook) {

309 warping_mouse = 1;

310 glutWarpPointer(win_width / 2, win_height / 2);

311 glutPassiveMotionFunc(motion);

312 glutSetCursor(GLUT_CURSOR_NONE);

313 } else {

314 glutPassiveMotionFunc(0);

315 glutSetCursor(GLUT_CURSOR_INHERIT);

316 }

317 break;

318

319 case 'b':

320 case 'B':

321 freelook = !freelook;

322 break;

323

324 case 'r':

325 case 'R':

326 game_won = 0;

327 player_init(&player, &level);

328 break;

329

330 default:

331 break;

332 }

333 }

334

335 static void key_up(unsigned char key, int x, int y)

336 {

337 keystate[key] = 0;

338 }

339

340 static int bnstate[16];

341 static int prev_x, prev_y;

342

343 static void mouse(int bn, int state, int x, int y)

344 {

345 prev_x = x;

346 prev_y = y;

347 bnstate[bn - GLUT_LEFT_BUTTON] = state == GLUT_DOWN ? 1 : 0;

348 }

349

350 static void motion(int x, int y)

351 {

352 int dx, dy;

353 int cx = win_width / 2;

354 int cy = win_height / 2;

355

356 if(warping_mouse) {

357 warping_mouse = 0;

358 return;

359 }

360

361 dx = x - (mouselook ? cx : prev_x);

362 dy = y - (mouselook ? cy : prev_y);

363 prev_x = x;

364 prev_y = y;

365

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

367

368 if(mouselook || bnstate[0]) {

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

370 }

371 if(bnstate[2]) {

372 dbg_cam_dist += 0.1 * dy;

373 if(dbg_cam_dist < 0.0) dbg_cam_dist = 0.0;

374 }

375

376 if(mouselook) {

377 warping_mouse = 1;

378 glutWarpPointer(cx, cy);

379 prev_x = cx;

380 prev_y = cy;

381 }

382 }