Brian Paul | 5b0a7f3 | 2000-06-27 16:52:38 +0000 | [diff] [blame] | 1 | /* |
| 2 | * This program is under the GNU GPL. |
| 3 | * Use at your own risk. |
| 4 | * |
| 5 | * written by David Bucciarelli (tech.hmw@plus.it) |
| 6 | * Humanware s.r.l. |
| 7 | */ |
| 8 | |
| 9 | #include <stdio.h> |
| 10 | #include <stdlib.h> |
| 11 | #include <math.h> |
Brian Paul | 92eddb0 | 2005-01-09 17:37:50 +0000 | [diff] [blame] | 12 | #include <string.h> |
Brian Paul | 5b0a7f3 | 2000-06-27 16:52:38 +0000 | [diff] [blame] | 13 | |
Karl Schultz | 164ce12 | 2002-01-16 00:48:43 +0000 | [diff] [blame] | 14 | #if defined (WIN32)|| defined(_WIN32) |
Brian Paul | 5b0a7f3 | 2000-06-27 16:52:38 +0000 | [diff] [blame] | 15 | #include <windows.h> |
| 16 | #include <mmsystem.h> |
| 17 | #endif |
| 18 | |
| 19 | #include <GL/glut.h> |
| 20 | |
Brian Paul | 92eddb0 | 2005-01-09 17:37:50 +0000 | [diff] [blame] | 21 | #include "readtex.h" |
Brian Paul | 5b0a7f3 | 2000-06-27 16:52:38 +0000 | [diff] [blame] | 22 | |
| 23 | #ifdef XMESA |
| 24 | #include "GL/xmesa.h" |
| 25 | static int fullscreen = 1; |
| 26 | #endif |
| 27 | |
| 28 | static int WIDTH = 640; |
| 29 | static int HEIGHT = 480; |
| 30 | |
Brian Paul | d49b34a | 2000-09-12 18:44:45 +0000 | [diff] [blame] | 31 | static GLint T0; |
| 32 | static GLint Frames; |
| 33 | |
Brian Paul | 5b0a7f3 | 2000-06-27 16:52:38 +0000 | [diff] [blame] | 34 | #define MAX_LOD 9 |
| 35 | |
| 36 | #define TEX_SKY_WIDTH 256 |
| 37 | #define TEX_SKY_HEIGHT TEX_SKY_WIDTH |
| 38 | |
| 39 | #ifndef M_PI |
| 40 | #define M_PI 3.1415926535 |
| 41 | #endif |
| 42 | |
| 43 | #define FROM_NONE 0 |
| 44 | #define FROM_DOWN 1 |
| 45 | #define FROM_UP 2 |
| 46 | #define FROM_LEFT 3 |
| 47 | #define FROM_RIGHT 4 |
| 48 | #define FROM_FRONT 5 |
| 49 | #define FROM_BACK 6 |
| 50 | |
| 51 | static int win = 0; |
| 52 | |
| 53 | static float obs[3] = { 3.8, 0.0, 0.0 }; |
| 54 | static float dir[3]; |
| 55 | static float v = 0.0; |
| 56 | static float alpha = -90.0; |
| 57 | static float beta = 90.0; |
| 58 | |
| 59 | static int fog = 1; |
| 60 | static int bfcull = 1; |
| 61 | static int usetex = 1; |
| 62 | static int help = 1; |
| 63 | static int poutline = 0; |
| 64 | static int normext = 1; |
| 65 | static int joyavailable = 0; |
| 66 | static int joyactive = 0; |
| 67 | static int LODbias = 3; |
| 68 | static int maxdepth = MAX_LOD; |
| 69 | |
| 70 | static unsigned int totpoly = 0; |
| 71 | |
| 72 | static GLuint t1id, t2id; |
| 73 | static GLuint skydlist, LODdlist[MAX_LOD], LODnumpoly[MAX_LOD]; |
| 74 | |
| 75 | static void |
| 76 | initlight(void) |
| 77 | { |
| 78 | GLfloat lspec[4] = { 1.0, 1.0, 1.0, 1.0 }; |
| 79 | static GLfloat lightpos[4] = { 30, 15.0, 30.0, 1.0 }; |
| 80 | |
| 81 | glLightfv(GL_LIGHT0, GL_POSITION, lightpos); |
| 82 | glLightfv(GL_LIGHT0, GL_SPECULAR, lspec); |
| 83 | |
| 84 | glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 32.0); |
| 85 | glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, lspec); |
| 86 | } |
| 87 | |
| 88 | static void |
| 89 | initdlists(void) |
| 90 | { |
Brian Paul | 02e8a03 | 2000-06-27 17:04:43 +0000 | [diff] [blame] | 91 | static int slicetable[MAX_LOD][2] = { |
Brian Paul | 5b0a7f3 | 2000-06-27 16:52:38 +0000 | [diff] [blame] | 92 | {21, 10}, |
| 93 | {18, 9}, |
| 94 | {15, 8}, |
| 95 | {12, 7}, |
| 96 | {9, 6}, |
| 97 | {7, 5}, |
| 98 | {5, 4}, |
| 99 | {4, 3}, |
| 100 | {3, 2} |
| 101 | }; |
| 102 | GLUquadricObj *obj; |
| 103 | int i, xslices, yslices; |
| 104 | |
| 105 | obj = gluNewQuadric(); |
| 106 | |
| 107 | skydlist = glGenLists(1); |
| 108 | glNewList(skydlist, GL_COMPILE); |
| 109 | glBindTexture(GL_TEXTURE_2D, t2id); |
| 110 | glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); |
| 111 | glColor3f(1.0f, 1.0f, 1.0f); |
| 112 | |
| 113 | gluQuadricDrawStyle(obj, GLU_FILL); |
| 114 | gluQuadricNormals(obj, GLU_NONE); |
| 115 | gluQuadricTexture(obj, GL_TRUE); |
| 116 | gluQuadricOrientation(obj, GLU_INSIDE); |
| 117 | gluSphere(obj, 40.0f, 18, 9); |
| 118 | |
| 119 | glEndList(); |
| 120 | |
| 121 | for (i = 0; i < MAX_LOD; i++) { |
| 122 | LODdlist[i] = glGenLists(1); |
| 123 | glNewList(LODdlist[i], GL_COMPILE); |
| 124 | |
| 125 | gluQuadricDrawStyle(obj, GLU_FILL); |
| 126 | gluQuadricNormals(obj, GLU_SMOOTH); |
| 127 | gluQuadricTexture(obj, GL_TRUE); |
| 128 | gluQuadricOrientation(obj, GLU_OUTSIDE); |
| 129 | xslices = slicetable[i][0]; |
| 130 | yslices = slicetable[i][1]; |
| 131 | gluSphere(obj, 1.0f, xslices, yslices); |
| 132 | LODnumpoly[i] = xslices * (yslices - 2) + 2 * (xslices - 1); |
| 133 | |
| 134 | glEndList(); |
| 135 | } |
Vinson Lee | a1afe30 | 2009-11-16 15:44:52 -0800 | [diff] [blame] | 136 | |
| 137 | gluDeleteQuadric(obj); |
Brian Paul | 5b0a7f3 | 2000-06-27 16:52:38 +0000 | [diff] [blame] | 138 | } |
| 139 | |
| 140 | static void |
| 141 | inittextures(void) |
| 142 | { |
| 143 | GLubyte tsky[TEX_SKY_HEIGHT][TEX_SKY_WIDTH][3]; |
| 144 | GLuint x, y; |
| 145 | GLfloat fact; |
| 146 | GLenum gluerr; |
| 147 | |
| 148 | /* Brick */ |
| 149 | |
| 150 | glGenTextures(1, &t1id); |
| 151 | glBindTexture(GL_TEXTURE_2D, t1id); |
| 152 | |
| 153 | if (!LoadRGBMipmaps("../images/bw.rgb", 3)) { |
| 154 | fprintf(stderr, "Error reading a texture.\n"); |
| 155 | exit(-1); |
| 156 | } |
| 157 | |
| 158 | glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); |
| 159 | glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); |
| 160 | |
| 161 | glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, |
| 162 | GL_LINEAR_MIPMAP_LINEAR); |
| 163 | glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
| 164 | |
| 165 | /* Sky */ |
| 166 | |
| 167 | glGenTextures(1, &t2id); |
| 168 | glBindTexture(GL_TEXTURE_2D, t2id); |
| 169 | |
| 170 | for (y = 0; y < TEX_SKY_HEIGHT; y++) |
| 171 | for (x = 0; x < TEX_SKY_WIDTH; x++) |
| 172 | if (y < TEX_SKY_HEIGHT / 2) { |
| 173 | fact = y / (GLfloat) (TEX_SKY_HEIGHT / 2); |
| 174 | tsky[y][x][0] = |
| 175 | (GLubyte) (255.0f * (0.1f * fact + 0.3f * (1.0f - fact))); |
| 176 | tsky[y][x][1] = |
| 177 | (GLubyte) (255.0f * (0.2f * fact + 1.0f * (1.0f - fact))); |
| 178 | tsky[y][x][2] = 255; |
| 179 | } |
| 180 | else { |
| 181 | tsky[y][x][0] = tsky[TEX_SKY_HEIGHT - y - 1][x][0]; |
| 182 | tsky[y][x][1] = tsky[TEX_SKY_HEIGHT - y - 1][x][1]; |
| 183 | tsky[y][x][2] = 255; |
| 184 | } |
| 185 | |
| 186 | glPixelStorei(GL_UNPACK_ALIGNMENT, 1); |
| 187 | if ( |
| 188 | (gluerr = |
| 189 | gluBuild2DMipmaps(GL_TEXTURE_2D, 3, TEX_SKY_WIDTH, TEX_SKY_HEIGHT, |
| 190 | GL_RGB, GL_UNSIGNED_BYTE, (GLvoid *) (tsky)))) { |
Brian Paul | 1972ac6 | 2002-08-08 17:12:38 +0000 | [diff] [blame] | 191 | fprintf(stderr, "GLULib%s\n", (char *) gluErrorString(gluerr)); |
Brian Paul | 5b0a7f3 | 2000-06-27 16:52:38 +0000 | [diff] [blame] | 192 | exit(-1); |
| 193 | } |
| 194 | |
| 195 | glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); |
| 196 | glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); |
| 197 | |
| 198 | glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, |
| 199 | GL_LINEAR_MIPMAP_LINEAR); |
| 200 | glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
| 201 | } |
| 202 | |
Brian Paul | 5b0a7f3 | 2000-06-27 16:52:38 +0000 | [diff] [blame] | 203 | static void |
| 204 | calcposobs(void) |
| 205 | { |
| 206 | dir[0] = sin(alpha * M_PI / 180.0); |
| 207 | dir[1] = cos(alpha * M_PI / 180.0) * sin(beta * M_PI / 180.0); |
| 208 | dir[2] = cos(beta * M_PI / 180.0); |
| 209 | |
Brian Paul | a41edc3 | 2001-05-09 20:02:28 +0000 | [diff] [blame] | 210 | if (dir[0] < 1.0e-5 && dir[0] > -1.0e-5) |
| 211 | dir[0] = 0; |
| 212 | if (dir[1] < 1.0e-5 && dir[1] > -1.0e-5) |
| 213 | dir[1] = 0; |
| 214 | if (dir[2] < 1.0e-5 && dir[2] > -1.0e-5) |
| 215 | dir[2] = 0; |
| 216 | |
Brian Paul | 5b0a7f3 | 2000-06-27 16:52:38 +0000 | [diff] [blame] | 217 | obs[0] += v * dir[0]; |
| 218 | obs[1] += v * dir[1]; |
| 219 | obs[2] += v * dir[2]; |
| 220 | } |
| 221 | |
| 222 | static void |
| 223 | special(int k, int x, int y) |
| 224 | { |
| 225 | switch (k) { |
| 226 | case GLUT_KEY_LEFT: |
| 227 | alpha -= 2.0; |
| 228 | break; |
| 229 | case GLUT_KEY_RIGHT: |
| 230 | alpha += 2.0; |
| 231 | break; |
| 232 | case GLUT_KEY_DOWN: |
| 233 | beta -= 2.0; |
| 234 | break; |
| 235 | case GLUT_KEY_UP: |
| 236 | beta += 2.0; |
| 237 | break; |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | static void |
Shuang He | e326600 | 2009-04-27 07:13:33 -0600 | [diff] [blame] | 242 | cleanup(void) |
| 243 | { |
| 244 | int i; |
| 245 | |
| 246 | glDeleteTextures(1, &t1id); |
| 247 | glDeleteTextures(1, &t2id); |
| 248 | |
| 249 | glDeleteLists(skydlist, 1); |
| 250 | for (i = 0; i < MAX_LOD; i++) { |
| 251 | glDeleteLists(LODdlist[i], 1); |
| 252 | glDeleteLists(LODnumpoly[i], 1); |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | |
| 257 | static void |
Brian Paul | 5b0a7f3 | 2000-06-27 16:52:38 +0000 | [diff] [blame] | 258 | key(unsigned char k, int x, int y) |
| 259 | { |
| 260 | switch (k) { |
| 261 | case 27: |
Shuang He | e326600 | 2009-04-27 07:13:33 -0600 | [diff] [blame] | 262 | cleanup(); |
Brian Paul | 5b0a7f3 | 2000-06-27 16:52:38 +0000 | [diff] [blame] | 263 | exit(0); |
| 264 | break; |
| 265 | |
| 266 | case 'a': |
| 267 | v += 0.01; |
| 268 | break; |
| 269 | case 'z': |
| 270 | v -= 0.01; |
| 271 | break; |
| 272 | |
| 273 | #ifdef XMESA |
| 274 | case ' ': |
| 275 | fullscreen = (!fullscreen); |
| 276 | XMesaSetFXmode(fullscreen ? XMESA_FX_FULLSCREEN : XMESA_FX_WINDOW); |
| 277 | break; |
| 278 | #endif |
| 279 | |
| 280 | case '+': |
| 281 | LODbias--; |
| 282 | break; |
| 283 | case '-': |
| 284 | LODbias++; |
| 285 | break; |
| 286 | case 'j': |
| 287 | joyactive = (!joyactive); |
| 288 | break; |
| 289 | case 'h': |
| 290 | help = (!help); |
| 291 | break; |
| 292 | case 'f': |
| 293 | fog = (!fog); |
| 294 | break; |
| 295 | case 't': |
| 296 | usetex = (!usetex); |
| 297 | break; |
| 298 | case 'n': |
| 299 | normext = (!normext); |
| 300 | break; |
| 301 | case 'b': |
| 302 | if (bfcull) { |
| 303 | glDisable(GL_CULL_FACE); |
| 304 | bfcull = 0; |
| 305 | } |
| 306 | else { |
| 307 | glEnable(GL_CULL_FACE); |
| 308 | bfcull = 1; |
| 309 | } |
| 310 | break; |
| 311 | case 'p': |
| 312 | if (poutline) { |
| 313 | glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); |
| 314 | poutline = 0; |
| 315 | usetex = 1; |
| 316 | } |
| 317 | else { |
| 318 | glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); |
| 319 | poutline = 1; |
| 320 | usetex = 0; |
| 321 | } |
| 322 | break; |
| 323 | } |
| 324 | } |
| 325 | |
| 326 | static void |
| 327 | reshape(int w, int h) |
| 328 | { |
| 329 | WIDTH = w; |
| 330 | HEIGHT = h; |
| 331 | glMatrixMode(GL_PROJECTION); |
| 332 | glLoadIdentity(); |
| 333 | gluPerspective(90.0, w / (float) h, 0.8, 100.0); |
| 334 | glMatrixMode(GL_MODELVIEW); |
| 335 | glLoadIdentity(); |
| 336 | glViewport(0, 0, w, h); |
| 337 | } |
| 338 | |
| 339 | static void |
| 340 | printstring(void *font, char *string) |
| 341 | { |
| 342 | int len, i; |
| 343 | |
| 344 | len = (int) strlen(string); |
| 345 | for (i = 0; i < len; i++) |
| 346 | glutBitmapCharacter(font, string[i]); |
| 347 | } |
| 348 | |
| 349 | static void |
| 350 | printhelp(void) |
| 351 | { |
| 352 | glEnable(GL_BLEND); |
| 353 | glColor4f(0.5, 0.5, 0.5, 0.5); |
| 354 | glRecti(40, 40, 600, 440); |
| 355 | glDisable(GL_BLEND); |
| 356 | |
| 357 | glColor3f(1.0, 0.0, 0.0); |
| 358 | glRasterPos2i(300, 420); |
| 359 | printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Help"); |
| 360 | |
| 361 | glRasterPos2i(60, 390); |
| 362 | printstring(GLUT_BITMAP_TIMES_ROMAN_24, "h - Toggle Help"); |
| 363 | glRasterPos2i(60, 360); |
| 364 | printstring(GLUT_BITMAP_TIMES_ROMAN_24, "t - Toggle Textures"); |
| 365 | glRasterPos2i(60, 330); |
| 366 | printstring(GLUT_BITMAP_TIMES_ROMAN_24, "f - Toggle Fog"); |
| 367 | glRasterPos2i(60, 300); |
| 368 | printstring(GLUT_BITMAP_TIMES_ROMAN_24, "b - Toggle Back face culling"); |
| 369 | glRasterPos2i(60, 270); |
| 370 | printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Arrow Keys - Rotate"); |
| 371 | glRasterPos2i(60, 240); |
| 372 | printstring(GLUT_BITMAP_TIMES_ROMAN_24, "a - Increase velocity"); |
| 373 | glRasterPos2i(60, 210); |
| 374 | printstring(GLUT_BITMAP_TIMES_ROMAN_24, "z - Decrease velocity"); |
| 375 | glRasterPos2i(60, 180); |
| 376 | printstring(GLUT_BITMAP_TIMES_ROMAN_24, "p - Toggle Wire frame"); |
| 377 | glRasterPos2i(60, 150); |
| 378 | printstring(GLUT_BITMAP_TIMES_ROMAN_24, |
Roland Scheidegger | 7225a72 | 2004-05-21 14:51:33 +0000 | [diff] [blame] | 379 | "n - Toggle GL_EXT_rescale_normal extension"); |
Brian Paul | 5b0a7f3 | 2000-06-27 16:52:38 +0000 | [diff] [blame] | 380 | glRasterPos2i(60, 120); |
| 381 | printstring(GLUT_BITMAP_TIMES_ROMAN_24, |
| 382 | "+/- - Increase/decrease the Object maximum LOD"); |
| 383 | |
| 384 | glRasterPos2i(60, 90); |
| 385 | if (joyavailable) |
| 386 | printstring(GLUT_BITMAP_TIMES_ROMAN_24, |
| 387 | "j - Toggle jostick control (Joystick control available)"); |
| 388 | else |
| 389 | printstring(GLUT_BITMAP_TIMES_ROMAN_24, |
| 390 | "(No Joystick control available)"); |
| 391 | } |
| 392 | |
| 393 | static void |
| 394 | dojoy(void) |
| 395 | { |
| 396 | #ifdef _WIN32 |
| 397 | static UINT max[2] = { 0, 0 }; |
| 398 | static UINT min[2] = { 0xffffffff, 0xffffffff }, center[2]; |
| 399 | MMRESULT res; |
| 400 | JOYINFO joy; |
| 401 | |
| 402 | res = joyGetPos(JOYSTICKID1, &joy); |
| 403 | |
| 404 | if (res == JOYERR_NOERROR) { |
| 405 | joyavailable = 1; |
| 406 | |
| 407 | if (max[0] < joy.wXpos) |
| 408 | max[0] = joy.wXpos; |
| 409 | if (min[0] > joy.wXpos) |
| 410 | min[0] = joy.wXpos; |
| 411 | center[0] = (max[0] + min[0]) / 2; |
| 412 | |
| 413 | if (max[1] < joy.wYpos) |
| 414 | max[1] = joy.wYpos; |
| 415 | if (min[1] > joy.wYpos) |
| 416 | min[1] = joy.wYpos; |
| 417 | center[1] = (max[1] + min[1]) / 2; |
| 418 | |
| 419 | if (joyactive) { |
| 420 | if (fabs(center[0] - (float) joy.wXpos) > 0.1 * (max[0] - min[0])) |
| 421 | alpha -= |
| 422 | 2.0 * (center[0] - (float) joy.wXpos) / (max[0] - min[0]); |
| 423 | if (fabs(center[1] - (float) joy.wYpos) > 0.1 * (max[1] - min[1])) |
| 424 | beta += 2.0 * (center[1] - (float) joy.wYpos) / (max[1] - min[1]); |
| 425 | |
| 426 | if (joy.wButtons & JOY_BUTTON1) |
| 427 | v += 0.01; |
| 428 | if (joy.wButtons & JOY_BUTTON2) |
| 429 | v -= 0.01; |
| 430 | } |
| 431 | } |
| 432 | else |
| 433 | joyavailable = 0; |
| 434 | #endif |
| 435 | } |
| 436 | |
| 437 | static void |
| 438 | drawipers(int depth, int from) |
| 439 | { |
| 440 | int lod; |
| 441 | |
| 442 | if (depth == maxdepth) |
| 443 | return; |
| 444 | |
| 445 | lod = depth + LODbias; |
| 446 | if (lod < 0) |
| 447 | lod = 0; |
| 448 | if (lod >= MAX_LOD) |
| 449 | return; |
| 450 | |
| 451 | switch (from) { |
| 452 | case FROM_NONE: |
| 453 | glCallList(LODdlist[lod]); |
| 454 | |
| 455 | depth++; |
| 456 | drawipers(depth, FROM_DOWN); |
| 457 | drawipers(depth, FROM_UP); |
| 458 | drawipers(depth, FROM_FRONT); |
| 459 | drawipers(depth, FROM_BACK); |
| 460 | drawipers(depth, FROM_LEFT); |
| 461 | drawipers(depth, FROM_RIGHT); |
| 462 | break; |
| 463 | case FROM_FRONT: |
| 464 | glPushMatrix(); |
| 465 | glTranslatef(0.0f, -1.5f, 0.0f); |
| 466 | glScalef(0.5f, 0.5f, 0.5f); |
| 467 | |
| 468 | glCallList(LODdlist[lod]); |
| 469 | |
| 470 | depth++; |
| 471 | drawipers(depth, FROM_DOWN); |
| 472 | drawipers(depth, FROM_UP); |
| 473 | drawipers(depth, FROM_FRONT); |
| 474 | drawipers(depth, FROM_LEFT); |
| 475 | drawipers(depth, FROM_RIGHT); |
| 476 | glPopMatrix(); |
| 477 | break; |
| 478 | case FROM_BACK: |
| 479 | glPushMatrix(); |
| 480 | glTranslatef(0.0f, 1.5f, 0.0f); |
| 481 | glScalef(0.5f, 0.5f, 0.5f); |
| 482 | |
| 483 | glCallList(LODdlist[lod]); |
| 484 | |
| 485 | depth++; |
| 486 | drawipers(depth, FROM_DOWN); |
| 487 | drawipers(depth, FROM_UP); |
| 488 | drawipers(depth, FROM_BACK); |
| 489 | drawipers(depth, FROM_LEFT); |
| 490 | drawipers(depth, FROM_RIGHT); |
| 491 | glPopMatrix(); |
| 492 | break; |
| 493 | case FROM_LEFT: |
| 494 | glPushMatrix(); |
| 495 | glTranslatef(-1.5f, 0.0f, 0.0f); |
| 496 | glScalef(0.5f, 0.5f, 0.5f); |
| 497 | |
| 498 | glCallList(LODdlist[lod]); |
| 499 | |
| 500 | depth++; |
| 501 | drawipers(depth, FROM_DOWN); |
| 502 | drawipers(depth, FROM_UP); |
| 503 | drawipers(depth, FROM_FRONT); |
| 504 | drawipers(depth, FROM_BACK); |
| 505 | drawipers(depth, FROM_LEFT); |
| 506 | glPopMatrix(); |
| 507 | break; |
| 508 | case FROM_RIGHT: |
| 509 | glPushMatrix(); |
| 510 | glTranslatef(1.5f, 0.0f, 0.0f); |
| 511 | glScalef(0.5f, 0.5f, 0.5f); |
| 512 | |
| 513 | glCallList(LODdlist[lod]); |
| 514 | |
| 515 | depth++; |
| 516 | drawipers(depth, FROM_DOWN); |
| 517 | drawipers(depth, FROM_UP); |
| 518 | drawipers(depth, FROM_FRONT); |
| 519 | drawipers(depth, FROM_BACK); |
| 520 | drawipers(depth, FROM_RIGHT); |
| 521 | glPopMatrix(); |
| 522 | break; |
| 523 | case FROM_DOWN: |
| 524 | glPushMatrix(); |
| 525 | glTranslatef(0.0f, 0.0f, 1.5f); |
| 526 | glScalef(0.5f, 0.5f, 0.5f); |
| 527 | |
| 528 | glCallList(LODdlist[lod]); |
| 529 | |
| 530 | depth++; |
| 531 | drawipers(depth, FROM_DOWN); |
| 532 | drawipers(depth, FROM_FRONT); |
| 533 | drawipers(depth, FROM_BACK); |
| 534 | drawipers(depth, FROM_LEFT); |
| 535 | drawipers(depth, FROM_RIGHT); |
| 536 | glPopMatrix(); |
| 537 | break; |
| 538 | case FROM_UP: |
| 539 | glPushMatrix(); |
| 540 | glTranslatef(0.0f, 0.0f, -1.5f); |
| 541 | glScalef(0.5f, 0.5f, 0.5f); |
| 542 | |
| 543 | glCallList(LODdlist[lod]); |
| 544 | |
| 545 | depth++; |
| 546 | drawipers(depth, FROM_UP); |
| 547 | drawipers(depth, FROM_FRONT); |
| 548 | drawipers(depth, FROM_BACK); |
| 549 | drawipers(depth, FROM_LEFT); |
| 550 | drawipers(depth, FROM_RIGHT); |
| 551 | glPopMatrix(); |
| 552 | break; |
| 553 | } |
| 554 | |
| 555 | totpoly += LODnumpoly[lod]; |
| 556 | } |
| 557 | |
| 558 | static void |
| 559 | draw(void) |
| 560 | { |
Brian Paul | d49b34a | 2000-09-12 18:44:45 +0000 | [diff] [blame] | 561 | static char frbuf[80] = ""; |
Brian Paul | 5b0a7f3 | 2000-06-27 16:52:38 +0000 | [diff] [blame] | 562 | static GLfloat alpha = 0.0f; |
| 563 | static GLfloat beta = 0.0f; |
Brian Paul | d49b34a | 2000-09-12 18:44:45 +0000 | [diff] [blame] | 564 | static float fr = 0.0; |
Brian Paul | 92eddb0 | 2005-01-09 17:37:50 +0000 | [diff] [blame] | 565 | static double t0 = -1.; |
| 566 | double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0; |
| 567 | if (t0 < 0.0) |
| 568 | t0 = t; |
| 569 | dt = t - t0; |
| 570 | t0 = t; |
Brian Paul | 5b0a7f3 | 2000-06-27 16:52:38 +0000 | [diff] [blame] | 571 | |
| 572 | dojoy(); |
| 573 | |
| 574 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
| 575 | |
| 576 | if (usetex) |
| 577 | glEnable(GL_TEXTURE_2D); |
| 578 | else |
| 579 | glDisable(GL_TEXTURE_2D); |
| 580 | |
| 581 | if (fog) |
| 582 | glEnable(GL_FOG); |
| 583 | else |
| 584 | glDisable(GL_FOG); |
| 585 | |
| 586 | glPushMatrix(); |
| 587 | calcposobs(); |
| 588 | gluLookAt(obs[0], obs[1], obs[2], |
| 589 | obs[0] + dir[0], obs[1] + dir[1], obs[2] + dir[2], |
| 590 | 0.0, 0.0, 1.0); |
| 591 | |
| 592 | /* Scene */ |
| 593 | glEnable(GL_DEPTH_TEST); |
| 594 | |
| 595 | glShadeModel(GL_SMOOTH); |
| 596 | glBindTexture(GL_TEXTURE_2D, t1id); |
| 597 | glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
| 598 | glColor3f(1.0f, 1.0f, 1.0f); |
| 599 | glEnable(GL_LIGHT0); |
| 600 | glEnable(GL_LIGHTING); |
| 601 | |
| 602 | if (normext) |
| 603 | glEnable(GL_RESCALE_NORMAL_EXT); |
| 604 | else |
| 605 | glEnable(GL_NORMALIZE); |
| 606 | |
| 607 | glPushMatrix(); |
| 608 | glRotatef(alpha, 0.0f, 0.0f, 1.0f); |
| 609 | glRotatef(beta, 1.0f, 0.0f, 0.0f); |
| 610 | totpoly = 0; |
| 611 | drawipers(0, FROM_NONE); |
| 612 | glPopMatrix(); |
| 613 | |
Brian Paul | 92eddb0 | 2005-01-09 17:37:50 +0000 | [diff] [blame] | 614 | alpha += 4.f * dt; |
| 615 | beta += 2.4f * dt; |
Brian Paul | 5b0a7f3 | 2000-06-27 16:52:38 +0000 | [diff] [blame] | 616 | |
| 617 | glDisable(GL_LIGHTING); |
| 618 | glDisable(GL_LIGHT0); |
| 619 | glShadeModel(GL_FLAT); |
| 620 | |
| 621 | if (normext) |
| 622 | glDisable(GL_RESCALE_NORMAL_EXT); |
| 623 | else |
| 624 | glDisable(GL_NORMALIZE); |
| 625 | |
| 626 | glCallList(skydlist); |
| 627 | |
| 628 | glPopMatrix(); |
| 629 | |
| 630 | /* Help Screen */ |
| 631 | |
Brian Paul | 5b0a7f3 | 2000-06-27 16:52:38 +0000 | [diff] [blame] | 632 | sprintf(frbuf, |
| 633 | "Frame rate: %0.2f LOD: %d Tot. poly.: %d Poly/sec: %.1f", |
Brian Paul | d49b34a | 2000-09-12 18:44:45 +0000 | [diff] [blame] | 634 | fr, LODbias, totpoly, totpoly * fr); |
Brian Paul | 5b0a7f3 | 2000-06-27 16:52:38 +0000 | [diff] [blame] | 635 | |
| 636 | glDisable(GL_TEXTURE_2D); |
| 637 | glDisable(GL_FOG); |
| 638 | glShadeModel(GL_FLAT); |
| 639 | glDisable(GL_DEPTH_TEST); |
| 640 | |
| 641 | glMatrixMode(GL_PROJECTION); |
| 642 | glPushMatrix(); |
| 643 | glLoadIdentity(); |
| 644 | glOrtho(-0.5, 639.5, -0.5, 479.5, -1.0, 1.0); |
| 645 | |
| 646 | glMatrixMode(GL_MODELVIEW); |
| 647 | glLoadIdentity(); |
| 648 | |
| 649 | glColor3f(1.0, 0.0, 0.0); |
| 650 | glRasterPos2i(10, 10); |
| 651 | printstring(GLUT_BITMAP_HELVETICA_18, frbuf); |
| 652 | glRasterPos2i(350, 470); |
| 653 | printstring(GLUT_BITMAP_HELVETICA_10, |
| 654 | "IperS V1.0 Written by David Bucciarelli (tech.hmw@plus.it)"); |
| 655 | |
| 656 | if (help) |
| 657 | printhelp(); |
| 658 | |
| 659 | glMatrixMode(GL_PROJECTION); |
| 660 | glPopMatrix(); |
| 661 | glMatrixMode(GL_MODELVIEW); |
| 662 | |
| 663 | glutSwapBuffers(); |
| 664 | |
Brian Paul | d49b34a | 2000-09-12 18:44:45 +0000 | [diff] [blame] | 665 | Frames++; |
| 666 | { |
| 667 | GLint t = glutGet(GLUT_ELAPSED_TIME); |
| 668 | if (t - T0 >= 2000) { |
| 669 | GLfloat seconds = (t - T0) / 1000.0; |
| 670 | fr = Frames / seconds; |
| 671 | T0 = t; |
| 672 | Frames = 0; |
| 673 | } |
| 674 | } |
Brian Paul | 5b0a7f3 | 2000-06-27 16:52:38 +0000 | [diff] [blame] | 675 | } |
| 676 | |
| 677 | int |
| 678 | main(int ac, char **av) |
| 679 | { |
| 680 | float fogcolor[4] = { 0.7, 0.7, 0.7, 1.0 }; |
| 681 | |
| 682 | fprintf(stderr, |
| 683 | "IperS V1.0\nWritten by David Bucciarelli (tech.hmw@plus.it)\n"); |
| 684 | |
Brian Paul | 5b0a7f3 | 2000-06-27 16:52:38 +0000 | [diff] [blame] | 685 | glutInitWindowSize(WIDTH, HEIGHT); |
| 686 | glutInit(&ac, av); |
| 687 | |
| 688 | glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE); |
| 689 | |
| 690 | if (!(win = glutCreateWindow("IperS"))) { |
| 691 | fprintf(stderr, "Error, couldn't open window\n"); |
| 692 | exit(-1); |
| 693 | } |
| 694 | |
| 695 | reshape(WIDTH, HEIGHT); |
| 696 | |
| 697 | glShadeModel(GL_SMOOTH); |
| 698 | glEnable(GL_DEPTH_TEST); |
| 699 | glEnable(GL_CULL_FACE); |
| 700 | glEnable(GL_TEXTURE_2D); |
| 701 | |
| 702 | glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); |
| 703 | |
| 704 | glEnable(GL_FOG); |
| 705 | glFogi(GL_FOG_MODE, GL_EXP2); |
| 706 | glFogfv(GL_FOG_COLOR, fogcolor); |
| 707 | |
| 708 | glFogf(GL_FOG_DENSITY, 0.006); |
| 709 | |
| 710 | glHint(GL_FOG_HINT, GL_NICEST); |
| 711 | |
| 712 | inittextures(); |
| 713 | initdlists(); |
| 714 | initlight(); |
| 715 | |
| 716 | glClearColor(fogcolor[0], fogcolor[1], fogcolor[2], fogcolor[3]); |
| 717 | glClear(GL_COLOR_BUFFER_BIT); |
| 718 | |
| 719 | calcposobs(); |
| 720 | |
| 721 | glutReshapeFunc(reshape); |
| 722 | glutDisplayFunc(draw); |
| 723 | glutKeyboardFunc(key); |
| 724 | glutSpecialFunc(special); |
| 725 | glutIdleFunc(draw); |
| 726 | |
| 727 | glutMainLoop(); |
Shuang He | e326600 | 2009-04-27 07:13:33 -0600 | [diff] [blame] | 728 | cleanup(); |
Brian Paul | 5b0a7f3 | 2000-06-27 16:52:38 +0000 | [diff] [blame] | 729 | |
| 730 | return 0; |
| 731 | } |