dungeon_crawler: fa8f89d06f6f prototype/src/main.cc

dungeon_crawler

view prototype/src/main.cc @ 23:fa8f89d06f6f

progress with light rendering

author	John Tsiombikas <nuclear@member.fsf.org>
date	Thu, 23 Aug 2012 00:10:10 +0300
parents	5c41e6fcb300
children	e122ba214ee1

line source

1 #include <stdio.h>

2 #include <stdlib.h>

3 #include <assert.h>

4 #include <unistd.h>

5 #include "opengl.h"

6 #include "level.h"

7 #include "camera.h"

8 #include "datapath.h"

9 #include "tileset.h"

10 #include "renderer.h"

11 #include "cfg.h"

13 bool init(int xsz, int ysz);

14 void cleanup();

15 void idle();

16 void disp();

17 void draw();

18 void view_matrix(int eye);

19 void proj_matrix(int eye);

20 void update(unsigned long msec);

21 void reshape(int x, int y);

22 void keyb(unsigned char key, int x, int y);

23 void key_release(unsigned char key, int x, int y);

24 void mouse(int bn, int state, int x, int y);

25 void motion(int x, int y);

27 static TileSet *tileset;

28 static Level *level;

30 static FpsCamera cam;

31 static bool keystate[256];

33 static float stereo_focus_dist = 0.25;

34 static float stereo_eye_sep = stereo_focus_dist / 30.0;

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

38 {

39 glutInit(&argc, argv);

41 if(!cfg.parse_args(argc, argv)) {

42 return 1;

43 }

45 glutInitWindowSize(cfg.width, cfg.height);

46 glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE | (cfg.stereo ? GLUT_STEREO : 0));

47 glutCreateWindow("dungeon crawler prototype");

49 glutIdleFunc(idle);

50 glutDisplayFunc(disp);

51 glutReshapeFunc(reshape);

52 glutKeyboardFunc(keyb);

53 glutKeyboardUpFunc(key_release);

54 glutMouseFunc(mouse);

55 glutMotionFunc(motion);

57 glewInit();

59 if(!init(cfg.width, cfg.height)) {

60 return 1;

61 }

63 glutMainLoop();

64 }

66 bool init(int xsz, int ysz)

67 {

68 glEnable(GL_LIGHTING);

69 glEnable(GL_LIGHT0);

70 float ldir[] = {-1, 1, 2, 0};

71 glLightfv(GL_LIGHT0, GL_POSITION, ldir);

72 glEnable(GL_NORMALIZE);

74 glEnable(GL_DEPTH_TEST);

75 glEnable(GL_CULL_FACE);

76 glEnable(GL_MULTISAMPLE);

78 add_data_path("data");

79 add_data_path("sdr");

81 if(!init_renderer(xsz, ysz)) {

82 return false;

83 }

85 // load a tileset

86 tileset = new TileSet;

87 printf("loading tileset: %s\n", cfg.tileset_file);

88 if(!tileset->load(datafile_path(cfg.tileset_file))) {

89 return false;

90 }

91 set_active_tileset(tileset);

93 level = new Level;

94 printf("loading level: %s\n", cfg.level_file);

95 if(!level->load(datafile_path(cfg.level_file))) {

96 return false;

97 }

99 cam.input_move(0, 0.5, 0);

100

101 return true;

102 }

103

104 void cleanup()

105 {

106 delete level;

107 delete tileset;

108

109 destroy_renderer();

110 }

111

112 void idle()

113 {

114 glutPostRedisplay();

115 }

116

117 void disp()

118 {

119 update(glutGet(GLUT_ELAPSED_TIME));

120

121 if(cfg.stereo) {

122 glDrawBuffer(GL_BACK_LEFT);

123

124 glMatrixMode(GL_PROJECTION);

125 glLoadIdentity();

126 proj_matrix(-1);

127 glMatrixMode(GL_MODELVIEW);

128 glLoadIdentity();

129 view_matrix(-1);

130

131 render_deferred(level);

132

133 glDrawBuffer(GL_BACK_RIGHT);

134

135 glMatrixMode(GL_PROJECTION);

136 glLoadIdentity();

137 proj_matrix(1);

138 glMatrixMode(GL_MODELVIEW);

139 glLoadIdentity();

140 view_matrix(1);

141

142 render_deferred(level);

143

144 } else {

145 glMatrixMode(GL_PROJECTION);

146 glLoadIdentity();

147 proj_matrix(0);

148 glMatrixMode(GL_MODELVIEW);

149 glLoadIdentity();

150 view_matrix(0);

151

152 render_deferred(level);

153 }

154

155 glutSwapBuffers();

156 assert(glGetError() == GL_NO_ERROR);

157

158 usleep(10000);

159 }

160

161 void view_matrix(int eye)

162 {

163 float offs = stereo_eye_sep * eye * 0.5;

164 glTranslatef(-offs, 0, 0);

165 cam.use_inverse();

166 }

167

168 void proj_matrix(int eye)

169 {

170 static const float fov = M_PI / 4.0;

171 static const float near_clip = 0.1;

172 static const float far_clip = 100.0;

173

174 float top = near_clip * tan(fov * 0.5);

175 float right = top * (float)cfg.width / (float)cfg.height;

176

177 float frust_shift = -(float)eye * (stereo_eye_sep * 0.5 * near_clip / stereo_focus_dist);

178 glFrustum(-right + frust_shift, right + frust_shift, -top, top, near_clip, far_clip);

179 }

180

181

182 void update(unsigned long msec)

183 {

184 static unsigned long last_upd;

185

186 if(last_upd == 0) {

187 last_upd = msec;

188 }

189 float dt = (float)(msec - last_upd) / 1000.0;

190

191 float offs = 2.5 * dt;

192 float dx = 0, dy = 0;

193

194 // handle key input

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

196 dy -= offs;

197 }

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

199 dy += offs;

200 }

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

202 dx += offs;

203 }

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

205 dx -= offs;

206 }

207

208 cam.input_move(dx, 0, dy);

209

210 last_upd = msec;

211 }

212

213 void reshape(int x, int y)

214 {

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

216 cfg.width = x;

217 cfg.height = y;

218 }

219

220 static bool stereo_shift_pressed;

221

222 void keyb(unsigned char key, int x, int y)

223 {

224 switch(key) {

225 case 27:

226 exit(0);

227

228 case 'z':

229 stereo_shift_pressed = true;

230 break;

231

232 case '\n':

233 case '\r':

234 {

235 static bool fullscr;

236 if(glutGetModifiers() & GLUT_ACTIVE_ALT) {

237 fullscr = !fullscr;

238 if(fullscr) {

239 glutFullScreen();

240 } else {

241 glutPositionWindow(20, 20);

242 }

243 }

244 }

245 break;

246

247 default:

248 break;

249 }

250

251 keystate[key] = true;

252 }

253

254 void key_release(unsigned char key, int x, int y)

255 {

256 switch(key) {

257 case 'z':

258 stereo_shift_pressed = false;

259 break;

260

261 default:

262 break;

263 }

264

265 keystate[key] = false;

266 }

267

268 static int prev_x, prev_y;

269 static bool bnstate[32];

270

271 void mouse(int bn, int state, int x, int y)

272 {

273 prev_x = x;

274 prev_y = y;

275 bnstate[bn - GLUT_LEFT_BUTTON] = state == GLUT_DOWN;

276 }

277

278 void motion(int x, int y)

279 {

280 int dx = x - prev_x;

281 int dy = y - prev_y;

282 prev_x = x;

283 prev_y = y;

284

285 if(stereo_shift_pressed) {

286 if(dy != 0) {

287 stereo_focus_dist += dy * 0.01;

288 stereo_eye_sep = stereo_focus_dist / 30.0;

289 printf("foc: %f, sep: %f\n", stereo_focus_dist, stereo_eye_sep);

290 glutPostRedisplay();

291 }

292 return;

293 }

294

295 if(bnstate[0]) {

296 cam.input_rotate(dy * 0.01, dx * 0.01, 0);

297 glutPostRedisplay();

298 }

299 if(bnstate[2]) {

300 cam.input_zoom(dy * 0.1);

301 glutPostRedisplay();

302 }

303 }