git.hungrycats.org Git - xscreensaver/blob - hacks/glx/pipes.c

   1 /* -*- Mode: C; tab-width: 4 -*- */
   2 /* pipes --- 3D selfbuiding pipe system */
   3
   4 #if !defined( lint ) && !defined( SABER )
   5 static const char sccsid[] = "@(#)pipes.c       4.07 97/11/24 xlockmore";
   6
   7 #endif
   8
   9 /*-
  10  * Permission to use, copy, modify, and distribute this software and its
  11  * documentation for any purpose and without fee is hereby granted,
  12  * provided that the above copyright notice appear in all copies and that
  13  * both that copyright notice and this permission notice appear in
  14  * supporting documentation.
  15  *
  16  * This file is provided AS IS with no warranties of any kind.  The author
  17  * shall have no liability with respect to the infringement of copyrights,
  18  * trade secrets or any patents by this file or any part thereof.  In no
  19  * event will the author be liable for any lost revenue or profits or
  20  * other special, indirect and consequential damages.
  21  *
  22  * This program was inspired on a WindowsNT(R)'s screen saver. It was written
  23  * from scratch and it was not based on any other source code.
  24  *
  25  * ==========================================================================
  26  * The routine myElbow is derivated from the doughnut routine from the MesaGL
  27  * library (more especifically the Mesaaux library) written by Brian Paul.
  28  * ==========================================================================
  29  *
  30  * Thanks goes to Brian Paul for making it possible and inexpensive to use
  31  * OpenGL at home.
  32  *
  33  * Since I'm not a native English speaker, my apologies for any grammatical
  34  * mistake.
  35  *
  36  * My e-mail address is
  37  * m-vianna@usa.net
  38  * Marcelo F. Vianna (Apr-09-1997)
  39  *
  40  * Revision History:
  41  * 29-Apr-97: Factory equipment by Ed Mackey.  Productive day today, eh?
  42  * 29-Apr-97: Less tight turns Jeff Epler <jepler@inetnebr.com>
  43  * 29-Apr-97: Efficiency speed-ups by Marcelo F. Vianna
  44  */
  45
  46 /*-
  47  * due to a Bug/feature in VMS X11/Intrinsic.h has to be placed before xlock.
  48  * otherwise caddr_t is not defined correctly
  49  */
  50
  51 #include <X11/Intrinsic.h>
  52
  53 #ifdef STANDALONE
  54 # define PROGCLASS                                      "Pipes"
  55 # define HACK_INIT                                      init_pipes
  56 # define HACK_DRAW                                      draw_pipes
  57 # define pipes_opts                                     xlockmore_opts
  58 # define DEFAULTS       "*delay:                100     \n"                     \
  59                                         "*count:                2       \n"                     \
  60                                         "*cycles:               5       \n"                     \
  61                                         "*size:                 500     \n"                     \
  62                                         "*fisheye:              True    \n"                     \
  63                                         "*tightturns:   False   \n"                     \
  64                                         "*rotatepipes:  True    \n"                     \
  65                                         "*noBuffer:             True    \n"
  66 # include "xlockmore.h"                         /* from the xscreensaver distribution */
  67 #else  /* !STANDALONE */
  68 # include "xlock.h"                                     /* from the xlockmore distribution */
  69 #endif /* !STANDALONE */
  70
  71 #ifdef USE_GL
  72
  73 #include <GL/glu.h>
  74 #include "buildlwo.h"
  75
  76 #define DEF_FACTORY     "2"
  77 #define DEF_FISHEYE     "True"
  78 #define DEF_TIGHTTURNS  "False"
  79 #define DEF_ROTATEPIPES "True"
  80 #define NofSysTypes     3
  81
  82 static int  factory;
  83 static Bool fisheye, tightturns, rotatepipes;
  84
  85 static XrmOptionDescRec opts[] =
  86 {
  87         {"-factory", ".pipes.factory", XrmoptionSepArg, (caddr_t) NULL},
  88         {"-fisheye", ".pipes.fisheye", XrmoptionNoArg, (caddr_t) "on"},
  89         {"+fisheye", ".pipes.fisheye", XrmoptionNoArg, (caddr_t) "off"},
  90         {"-tightturns", ".pipes.tightturns", XrmoptionNoArg, (caddr_t) "on"},
  91         {"+tightturns", ".pipes.tightturns", XrmoptionNoArg, (caddr_t) "off"},
  92       {"-rotatepipes", ".pipes.rotatepipes", XrmoptionNoArg, (caddr_t) "on"},
  93       {"+rotatepipes", ".pipes.rotatepipes", XrmoptionNoArg, (caddr_t) "off"}
  94 };
  95 static argtype vars[] =
  96 {
  97         {(caddr_t *) & factory, "factory", "Factory", DEF_FACTORY, t_Int},
  98         {(caddr_t *) & fisheye, "fisheye", "Fisheye", DEF_FISHEYE, t_Bool},
  99         {(caddr_t *) & tightturns, "tightturns", "Tightturns", DEF_TIGHTTURNS, t_Bool},
 100         {(caddr_t *) & rotatepipes, "rotatepipes", "Rotatepipes", DEF_ROTATEPIPES, t_Bool}
 101 };
 102 static OptionStruct desc[] =
 103 {
 104         {"-factory num", "how much extra equipment in pipes (0 for none)"},
 105         {"-/+fisheye", "turn on/off zoomed-in view of pipes"},
 106         {"-/+tightturns", "turn on/off tight turns"},
 107         {"-/+rotatepipes", "turn on/off pipe system rotation per screenful"}
 108 };
 109
 110 ModeSpecOpt pipes_opts =
 111 {sizeof opts / sizeof opts[0], opts, sizeof vars / sizeof vars[0], vars, desc};
 112
 113 #ifdef USE_MODULES
 114 ModStruct   pipes_description =
 115 {"pipes", "init_pipes", "draw_pipes", "release_pipes",
 116 #if defined( MESA ) && defined( SLOW )
 117  "draw_pipes",
 118 #else
 119  "change_pipes",
 120 #endif
 121  "change_pipes", NULL, &pipes_opts,
 122  1000, 2, 5, 500, 4, 1.0, "",
 123  "Shows a selfbuilding pipe system", 0, NULL};
 124
 125 #endif
 126
 127 #define Scale4Window               0.1
 128 #define Scale4Iconic               0.07
 129
 130 #define one_third                  0.3333333333333333333
 131
 132 #define dirNone -1
 133 #define dirUP 0
 134 #define dirDOWN 1
 135 #define dirLEFT 2
 136 #define dirRIGHT 3
 137 #define dirNEAR 4
 138 #define dirFAR 5
 139
 140 #define HCELLS 33
 141 #define VCELLS 25
 142 #define DEFINEDCOLORS 7
 143 #define elbowradius 0.5
 144
 145 /*************************************************************************/
 146
 147 typedef struct {
 148 #if defined( MESA ) && defined( SLOW )
 149         int         flip;
 150 #endif
 151         GLint       WindH, WindW;
 152         int         Cells[HCELLS][VCELLS][HCELLS];
 153         int         usedcolors[DEFINEDCOLORS];
 154         int         directions[6];
 155         int         ndirections;
 156         int         nowdir, olddir;
 157         int         system_number;
 158         int         counter;
 159         int         PX, PY, PZ;
 160         int         number_of_systems;
 161         int         system_type;
 162         int         system_length;
 163         int         turncounter;
 164         Window      window;
 165         float      *system_color;
 166         GLfloat     initial_rotation;
 167         GLuint      valve, bolts, betweenbolts, elbowbolts, elbowcoins;
 168         GLuint      guagehead, guageface, guagedial, guageconnector;
 169         GLXContext *glx_context;
 170 } pipesstruct;
 171
 172 extern struct lwo LWO_BigValve, LWO_PipeBetweenBolts, LWO_Bolts3D;
 173 extern struct lwo LWO_GuageHead, LWO_GuageFace, LWO_GuageDial, LWO_GuageConnector;
 174 extern struct lwo LWO_ElbowBolts, LWO_ElbowCoins;
 175
 176 static float front_shininess[] =
 177 {60.0};
 178 static float front_specular[] =
 179 {0.7, 0.7, 0.7, 1.0};
 180 static float ambient0[] =
 181 {0.4, 0.4, 0.4, 1.0};
 182 static float diffuse0[] =
 183 {1.0, 1.0, 1.0, 1.0};
 184 static float ambient1[] =
 185 {0.2, 0.2, 0.2, 1.0};
 186 static float diffuse1[] =
 187 {0.5, 0.5, 0.5, 1.0};
 188 static float position0[] =
 189 {1.0, 1.0, 1.0, 0.0};
 190 static float position1[] =
 191 {-1.0, -1.0, 1.0, 0.0};
 192 static float lmodel_ambient[] =
 193 {0.5, 0.5, 0.5, 1.0};
 194 static float lmodel_twoside[] =
 195 {GL_TRUE};
 196
 197 static float MaterialRed[] =
 198 {0.7, 0.0, 0.0, 1.0};
 199 static float MaterialGreen[] =
 200 {0.1, 0.5, 0.2, 1.0};
 201 static float MaterialBlue[] =
 202 {0.0, 0.0, 0.7, 1.0};
 203 static float MaterialCyan[] =
 204 {0.2, 0.5, 0.7, 1.0};
 205 static float MaterialYellow[] =
 206 {0.7, 0.7, 0.0, 1.0};
 207 static float MaterialMagenta[] =
 208 {0.6, 0.2, 0.5, 1.0};
 209 static float MaterialWhite[] =
 210 {0.7, 0.7, 0.7, 1.0};
 211 static float MaterialGray[] =
 212 {0.2, 0.2, 0.2, 1.0};
 213
 214 static pipesstruct *pipes = NULL;
 215
 216
 217 static void
 218 MakeTube(int direction)
 219 {
 220         float       an;
 221         float       SINan_3, COSan_3;
 222
 223         /*dirUP    = 00000000 */
 224         /*dirDOWN  = 00000001 */
 225         /*dirLEFT  = 00000010 */
 226         /*dirRIGHT = 00000011 */
 227         /*dirNEAR  = 00000100 */
 228         /*dirFAR   = 00000101 */
 229
 230         if (!(direction & 4)) {
 231                 glRotatef(90.0, (direction & 2) ? 0.0 : 1.0,
 232                           (direction & 2) ? 1.0 : 0.0, 0.0);
 233         }
 234         glBegin(GL_QUAD_STRIP);
 235         for (an = 0.0; an <= 2.0 * M_PI; an += M_PI / 12.0) {
 236                 glNormal3f((COSan_3 = cos(an) / 3.0), (SINan_3 = sin(an) / 3.0), 0.0);
 237                 glVertex3f(COSan_3, SINan_3, one_third);
 238                 glVertex3f(COSan_3, SINan_3, -one_third);
 239         }
 240         glEnd();
 241 }
 242
 243 static void
 244 mySphere(float radius)
 245 {
 246         GLUquadricObj *quadObj;
 247
 248         quadObj = gluNewQuadric();
 249         gluQuadricDrawStyle(quadObj, (GLenum) GLU_FILL);
 250         gluSphere(quadObj, radius, 16, 16);
 251         gluDeleteQuadric(quadObj);
 252 }
 253
 254 static void
 255 myElbow(ModeInfo * mi, int bolted)
 256 {
 257 #define nsides 25
 258 #define rings 25
 259 #define r one_third
 260 #define R one_third
 261
 262         pipesstruct *pp = &pipes[MI_SCREEN(mi)];
 263
 264         int         i, j;
 265         GLfloat     p0[3], p1[3], p2[3], p3[3];
 266         GLfloat     n0[3], n1[3], n2[3], n3[3];
 267         GLfloat     COSphi, COSphi1, COStheta, COStheta1;
 268         GLfloat     _SINtheta, _SINtheta1;
 269
 270         for (i = 0; i <= rings / 4; i++) {
 271                 GLfloat     theta, theta1;
 272
 273                 theta = (GLfloat) i *2.0 * M_PI / rings;
 274
 275                 theta1 = (GLfloat) (i + 1) * 2.0 * M_PI / rings;
 276                 for (j = 0; j < nsides; j++) {
 277                         GLfloat     phi, phi1;
 278
 279                         phi = (GLfloat) j *2.0 * M_PI / nsides;
 280
 281                         phi1 = (GLfloat) (j + 1) * 2.0 * M_PI / nsides;
 282
 283                         p0[0] = (COStheta = cos(theta)) * (R + r * (COSphi = cos(phi)));
 284                         p0[1] = (_SINtheta = -sin(theta)) * (R + r * COSphi);
 285
 286                         p1[0] = (COStheta1 = cos(theta1)) * (R + r * COSphi);
 287                         p1[1] = (_SINtheta1 = -sin(theta1)) * (R + r * COSphi);
 288
 289                         p2[0] = COStheta1 * (R + r * (COSphi1 = cos(phi1)));
 290                         p2[1] = _SINtheta1 * (R + r * COSphi1);
 291
 292                         p3[0] = COStheta * (R + r * COSphi1);
 293                         p3[1] = _SINtheta * (R + r * COSphi1);
 294
 295                         n0[0] = COStheta * COSphi;
 296                         n0[1] = _SINtheta * COSphi;
 297
 298                         n1[0] = COStheta1 * COSphi;
 299                         n1[1] = _SINtheta1 * COSphi;
 300
 301                         n2[0] = COStheta1 * COSphi1;
 302                         n2[1] = _SINtheta1 * COSphi1;
 303
 304                         n3[0] = COStheta * COSphi1;
 305                         n3[1] = _SINtheta * COSphi1;
 306
 307                         p0[2] = p1[2] = r * (n0[2] = n1[2] = sin(phi));
 308                         p2[2] = p3[2] = r * (n2[2] = n3[2] = sin(phi1));
 309
 310                         glBegin(GL_QUADS);
 311                         glNormal3fv(n3);
 312                         glVertex3fv(p3);
 313                         glNormal3fv(n2);
 314                         glVertex3fv(p2);
 315                         glNormal3fv(n1);
 316                         glVertex3fv(p1);
 317                         glNormal3fv(n0);
 318                         glVertex3fv(p0);
 319                         glEnd();
 320                 }
 321         }
 322
 323         if (factory > 0 && bolted) {
 324                 /* Bolt the elbow onto the pipe system */
 325                 glFrontFace(GL_CW);
 326                 glPushMatrix();
 327                 glRotatef(90.0, 0.0, 0.0, -1.0);
 328                 glRotatef(90.0, 0.0, 1.0, 0.0);
 329                 glTranslatef(0.0, one_third, one_third);
 330                 glCallList(pp->elbowcoins);
 331                 glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialGray);
 332                 glCallList(pp->elbowbolts);
 333                 glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, pp->system_color);
 334                 glPopMatrix();
 335                 glFrontFace(GL_CCW);
 336         }
 337 #undef r
 338 #undef R
 339 #undef nsides
 340 #undef rings
 341 }
 342
 343 static void
 344 FindNeighbors(ModeInfo * mi)
 345 {
 346         pipesstruct *pp = &pipes[MI_SCREEN(mi)];
 347
 348         pp->ndirections = 0;
 349         pp->directions[dirUP] = (!pp->Cells[pp->PX][pp->PY + 1][pp->PZ]) ? 1 : 0;
 350         pp->ndirections += pp->directions[dirUP];
 351         pp->directions[dirDOWN] = (!pp->Cells[pp->PX][pp->PY - 1][pp->PZ]) ? 1 : 0;
 352         pp->ndirections += pp->directions[dirDOWN];
 353         pp->directions[dirLEFT] = (!pp->Cells[pp->PX - 1][pp->PY][pp->PZ]) ? 1 : 0;
 354         pp->ndirections += pp->directions[dirLEFT];
 355         pp->directions[dirRIGHT] = (!pp->Cells[pp->PX + 1][pp->PY][pp->PZ]) ? 1 : 0;
 356         pp->ndirections += pp->directions[dirRIGHT];
 357         pp->directions[dirFAR] = (!pp->Cells[pp->PX][pp->PY][pp->PZ - 1]) ? 1 : 0;
 358         pp->ndirections += pp->directions[dirFAR];
 359         pp->directions[dirNEAR] = (!pp->Cells[pp->PX][pp->PY][pp->PZ + 1]) ? 1 : 0;
 360         pp->ndirections += pp->directions[dirNEAR];
 361 }
 362
 363 static int
 364 SelectNeighbor(ModeInfo * mi)
 365 {
 366         pipesstruct *pp = &pipes[MI_SCREEN(mi)];
 367         int         dirlist[6];
 368         int         i, j;
 369
 370         for (i = 0, j = 0; i < 6; i++) {
 371                 if (pp->directions[i]) {
 372                         dirlist[j] = i;
 373                         j++;
 374                 }
 375         }
 376
 377         return dirlist[NRAND(pp->ndirections)];
 378 }
 379
 380 static void
 381 MakeValve(ModeInfo * mi, int newdir)
 382 {
 383         pipesstruct *pp = &pipes[MI_SCREEN(mi)];
 384
 385         /* There is a glPopMatrix() right after this subroutine returns. */
 386         switch (newdir) {
 387                 case dirUP:
 388                 case dirDOWN:
 389                         glRotatef(90.0, 1.0, 0.0, 0.0);
 390                         glRotatef(NRAND(3) * 90.0, 0.0, 0.0, 1.0);
 391                         break;
 392                 case dirLEFT:
 393                 case dirRIGHT:
 394                         glRotatef(90.0, 0.0, -1.0, 0.0);
 395                         glRotatef((NRAND(3) * 90.0) - 90.0, 0.0, 0.0, 1.0);
 396                         break;
 397                 case dirNEAR:
 398                 case dirFAR:
 399                         glRotatef(NRAND(4) * 90.0, 0.0, 0.0, 1.0);
 400                         break;
 401         }
 402         glFrontFace(GL_CW);
 403         glCallList(pp->betweenbolts);
 404         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialGray);
 405         glCallList(pp->bolts);
 406         if (!MI_IS_MONO(mi)) {
 407                 if (pp->system_color == MaterialRed) {
 408                         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, NRAND(2) ? MaterialYellow : MaterialBlue);
 409                 } else if (pp->system_color == MaterialBlue) {
 410                         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, NRAND(2) ? MaterialRed : MaterialYellow);
 411                 } else if (pp->system_color == MaterialYellow) {
 412                         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, NRAND(2) ? MaterialBlue : MaterialRed);
 413                 } else {
 414                         switch ((NRAND(3))) {
 415                                 case 0:
 416                                         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialRed);
 417                                         break;
 418                                 case 1:
 419                                         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialBlue);
 420                                         break;
 421                                 case 2:
 422                                         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialYellow);
 423                         }
 424                 }
 425         }
 426         glRotatef((GLfloat) (NRAND(90)), 1.0, 0.0, 0.0);
 427         glCallList(pp->valve);
 428         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, pp->system_color);
 429         glFrontFace(GL_CCW);
 430 }
 431
 432 static int
 433 MakeGuage(ModeInfo * mi, int newdir)
 434 {
 435         pipesstruct *pp = &pipes[MI_SCREEN(mi)];
 436
 437         /* Can't have a guage on a vertical pipe. */
 438         if ((newdir == dirUP) || (newdir == dirDOWN))
 439                 return (0);
 440
 441         /* Is there space above this pipe for a guage? */
 442         if (!pp->directions[dirUP])
 443                 return (0);
 444
 445         /* Yes!  Mark the space as used. */
 446         pp->Cells[pp->PX][pp->PY + 1][pp->PZ] = 1;
 447
 448         glFrontFace(GL_CW);
 449         glPushMatrix();
 450         if ((newdir == dirLEFT) || (newdir == dirRIGHT))
 451                 glRotatef(90.0, 0.0, 1.0, 0.0);
 452         glCallList(pp->betweenbolts);
 453         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialGray);
 454         glCallList(pp->bolts);
 455         glPopMatrix();
 456
 457         glCallList(pp->guageconnector);
 458         glPushMatrix();
 459         glTranslatef(0.0, 1.33333, 0.0);
 460         /* Do not change the above to 1 + ONE_THIRD, because */
 461         /* the object really is centered on 1.3333300000. */
 462         glRotatef(NRAND(270) + 45.0, 0.0, 0.0, -1.0);
 463         /* Random rotation for the dial.  I love it. */
 464         glCallList(pp->guagedial);
 465         glPopMatrix();
 466
 467         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, pp->system_color);
 468         glCallList(pp->guagehead);
 469
 470         /* GuageFace is drawn last, in case of low-res depth buffers. */
 471         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialWhite);
 472         glCallList(pp->guageface);
 473
 474         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, pp->system_color);
 475         glFrontFace(GL_CCW);
 476
 477         return (1);
 478 }
 479
 480 static void
 481 MakeShape(ModeInfo * mi, int newdir)
 482 {
 483         switch (NRAND(2)) {
 484                 case 1:
 485                         if (!MakeGuage(mi, newdir))
 486                                 MakeTube(newdir);
 487                         break;
 488                 default:
 489                         MakeValve(mi, newdir);
 490                         break;
 491         }
 492 }
 493
 494 static void
 495 reshape(ModeInfo * mi, int width, int height)
 496 {
 497         pipesstruct *pp = &pipes[MI_SCREEN(mi)];
 498
 499         glViewport(0, 0, pp->WindW = (GLint) width, pp->WindH = (GLint) height);
 500         glMatrixMode(GL_PROJECTION);
 501         glLoadIdentity();
 502         /*glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 15.0); */
 503         gluPerspective(65.0, (GLfloat) width / (GLfloat) height, 0.1, 20.0);
 504         glMatrixMode(GL_MODELVIEW);
 505 }
 506
 507 static void
 508 pinit(ModeInfo * mi, int zera)
 509 {
 510         pipesstruct *pp = &pipes[MI_SCREEN(mi)];
 511         int         X, Y, Z;
 512
 513         glClearDepth(1.0);
 514         glClearColor(0.0, 0.0, 0.0, 1.0);
 515         glColor3f(1.0, 1.0, 1.0);
 516
 517         glLightfv(GL_LIGHT0, GL_AMBIENT, ambient0);
 518         glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse0);
 519         glLightfv(GL_LIGHT0, GL_POSITION, position0);
 520         glLightfv(GL_LIGHT1, GL_AMBIENT, ambient1);
 521         glLightfv(GL_LIGHT1, GL_DIFFUSE, diffuse1);
 522         glLightfv(GL_LIGHT1, GL_POSITION, position1);
 523         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
 524         glLightModelfv(GL_LIGHT_MODEL_TWO_SIDE, lmodel_twoside);
 525         glEnable(GL_LIGHTING);
 526         glEnable(GL_LIGHT0);
 527         glEnable(GL_LIGHT1);
 528         glEnable(GL_DEPTH_TEST);
 529         glEnable(GL_NORMALIZE);
 530         glEnable(GL_CULL_FACE);
 531
 532         glShadeModel(GL_SMOOTH);
 533         glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, front_shininess);
 534         glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, front_specular);
 535
 536         if (zera) {
 537                 pp->system_number = 1;
 538                 glDrawBuffer(GL_FRONT_AND_BACK);
 539                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 540                 (void) memset(pp->Cells, 0, sizeof (pp->Cells));
 541                 for (X = 0; X < HCELLS; X++) {
 542                         for (Y = 0; Y < VCELLS; Y++) {
 543                                 pp->Cells[X][Y][0] = 1;
 544                                 pp->Cells[X][Y][HCELLS - 1] = 1;
 545                                 pp->Cells[0][Y][X] = 1;
 546                                 pp->Cells[HCELLS - 1][Y][X] = 1;
 547                         }
 548                 }
 549                 for (X = 0; X < HCELLS; X++) {
 550                         for (Z = 0; Z < HCELLS; Z++) {
 551                                 pp->Cells[X][0][Z] = 1;
 552                                 pp->Cells[X][VCELLS - 1][Z] = 1;
 553                         }
 554                 }
 555                 (void) memset(pp->usedcolors, 0, sizeof (pp->usedcolors));
 556                 if ((pp->initial_rotation += 10.0) > 45.0) {
 557                         pp->initial_rotation -= 90.0;
 558                 }
 559         }
 560         pp->counter = 0;
 561         pp->turncounter = 0;
 562
 563         if (!MI_IS_MONO(mi)) {
 564                 int         collist[DEFINEDCOLORS];
 565                 int         i, j, lower = 1000;
 566
 567                 /* Avoid repeating colors on the same screen unless necessary */
 568                 for (i = 0; i < DEFINEDCOLORS; i++) {
 569                         if (lower > pp->usedcolors[i])
 570                                 lower = pp->usedcolors[i];
 571                 }
 572                 for (i = 0, j = 0; i < DEFINEDCOLORS; i++) {
 573                         if (pp->usedcolors[i] == lower) {
 574                                 collist[j] = i;
 575                                 j++;
 576                         }
 577                 }
 578                 i = collist[NRAND(j)];
 579                 pp->usedcolors[i]++;
 580                 switch (i) {
 581                         case 0:
 582                                 pp->system_color = MaterialRed;
 583                                 break;
 584                         case 1:
 585                                 pp->system_color = MaterialGreen;
 586                                 break;
 587                         case 2:
 588                                 pp->system_color = MaterialBlue;
 589                                 break;
 590                         case 3:
 591                                 pp->system_color = MaterialCyan;
 592                                 break;
 593                         case 4:
 594                                 pp->system_color = MaterialYellow;
 595                                 break;
 596                         case 5:
 597                                 pp->system_color = MaterialMagenta;
 598                                 break;
 599                         case 6:
 600                                 pp->system_color = MaterialWhite;
 601                                 break;
 602                 }
 603         } else {
 604                 pp->system_color = MaterialGray;
 605         }
 606
 607         do {
 608                 pp->PX = NRAND((HCELLS - 1)) + 1;
 609                 pp->PY = NRAND((VCELLS - 1)) + 1;
 610                 pp->PZ = NRAND((HCELLS - 1)) + 1;
 611         } while (pp->Cells[pp->PX][pp->PY][pp->PZ] ||
 612                  (pp->Cells[pp->PX + 1][pp->PY][pp->PZ] && pp->Cells[pp->PX - 1][pp->PY][pp->PZ] &&
 613                   pp->Cells[pp->PX][pp->PY + 1][pp->PZ] && pp->Cells[pp->PX][pp->PY - 1][pp->PZ] &&
 614                   pp->Cells[pp->PX][pp->PY][pp->PZ + 1] && pp->Cells[pp->PX][pp->PY][pp->PZ - 1]));
 615         pp->Cells[pp->PX][pp->PY][pp->PZ] = 1;
 616         pp->olddir = dirNone;
 617
 618         FindNeighbors(mi);
 619
 620         pp->nowdir = SelectNeighbor(mi);
 621 }
 622
 623 void
 624 init_pipes(ModeInfo * mi)
 625 {
 626         int         screen = MI_SCREEN(mi);
 627         pipesstruct *pp;
 628
 629         if (pipes == NULL) {
 630                 if ((pipes = (pipesstruct *) calloc(MI_NUM_SCREENS(mi),
 631                                               sizeof (pipesstruct))) == NULL)
 632                         return;
 633         }
 634         pp = &pipes[screen];
 635
 636         pp->window = MI_WINDOW(mi);
 637         if ((pp->glx_context = init_GL(mi)) != NULL) {
 638
 639                 reshape(mi, MI_WIDTH(mi), MI_HEIGHT(mi));
 640                 if (rotatepipes)
 641                   pp->initial_rotation = NRAND(180); /* jwz */
 642                 else
 643                   pp->initial_rotation = -10.0;
 644                 pinit(mi, 1);
 645
 646                 if (factory > 0) {
 647                         pp->valve = BuildLWO(MI_IS_WIREFRAME(mi), &LWO_BigValve);
 648                         pp->bolts = BuildLWO(MI_IS_WIREFRAME(mi), &LWO_Bolts3D);
 649                         pp->betweenbolts = BuildLWO(MI_IS_WIREFRAME(mi), &LWO_PipeBetweenBolts);
 650
 651                         pp->elbowbolts = BuildLWO(MI_IS_WIREFRAME(mi), &LWO_ElbowBolts);
 652                         pp->elbowcoins = BuildLWO(MI_IS_WIREFRAME(mi), &LWO_ElbowCoins);
 653
 654                         pp->guagehead = BuildLWO(MI_IS_WIREFRAME(mi), &LWO_GuageHead);
 655                         pp->guageface = BuildLWO(MI_IS_WIREFRAME(mi), &LWO_GuageFace);
 656                         pp->guagedial = BuildLWO(MI_IS_WIREFRAME(mi), &LWO_GuageDial);
 657                         pp->guageconnector = BuildLWO(MI_IS_WIREFRAME(mi), &LWO_GuageConnector);
 658                 }
 659                 /* else they are all 0, thanks to calloc(). */
 660
 661                 if (MI_COUNT(mi) < 1 || MI_COUNT(mi) > NofSysTypes + 1) {
 662                         pp->system_type = NRAND(NofSysTypes) + 1;
 663                 } else {
 664                         pp->system_type = MI_COUNT(mi);
 665                 }
 666
 667                 if (MI_CYCLES(mi) > 0 && MI_CYCLES(mi) < 11) {
 668                         pp->number_of_systems = MI_CYCLES(mi);
 669                 } else {
 670                         pp->number_of_systems = 5;
 671                 }
 672
 673                 if (MI_SIZE(mi) < 10) {
 674                         pp->system_length = 10;
 675                 } else if (MI_SIZE(mi) > 1000) {
 676                         pp->system_length = 1000;
 677                 } else {
 678                         pp->system_length = MI_SIZE(mi);
 679                 }
 680         } else {
 681                 MI_CLEARWINDOW(mi);
 682         }
 683 }
 684
 685 void
 686 draw_pipes(ModeInfo * mi)
 687 {
 688         pipesstruct *pp = &pipes[MI_SCREEN(mi)];
 689
 690         Display    *display = MI_DISPLAY(mi);
 691         Window      window = MI_WINDOW(mi);
 692
 693         int         newdir;
 694         int         OPX, OPY, OPZ;
 695
 696         if (!pp->glx_context)
 697                 return;
 698
 699         glXMakeCurrent(display, window, *(pp->glx_context));
 700
 701 #if defined( MESA ) && defined( SLOW )
 702         glDrawBuffer(GL_BACK);
 703 #else
 704         glDrawBuffer(GL_FRONT);
 705 #endif
 706         glPushMatrix();
 707
 708         glTranslatef(0.0, 0.0, fisheye ? -3.8 : -4.8);
 709         if (rotatepipes)
 710                 glRotatef(pp->initial_rotation, 0.0, 1.0, 0.0);
 711
 712         if (!MI_IS_ICONIC(mi)) {
 713                 /* Width/height ratio handled by gluPerspective() now. */
 714                 glScalef(Scale4Window, Scale4Window, Scale4Window);
 715         } else {
 716                 glScalef(Scale4Iconic, Scale4Iconic, Scale4Iconic);
 717         }
 718
 719         FindNeighbors(mi);
 720
 721         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, pp->system_color);
 722
 723         /* If it's the begining of a system, draw a sphere */
 724         if (pp->olddir == dirNone) {
 725                 glPushMatrix();
 726                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0);
 727                 mySphere(0.6);
 728                 glPopMatrix();
 729         }
 730         /* Check for stop conditions */
 731         if (pp->ndirections == 0 || pp->counter > pp->system_length) {
 732                 glPushMatrix();
 733                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0);
 734                 /* Finish the system with another sphere */
 735                 mySphere(0.6);
 736 #if defined( MESA ) && defined( SLOW )
 737                 glXSwapBuffers(display, window);
 738 #endif
 739                 glPopMatrix();
 740
 741                 /* If the maximum number of system was drawn, restart (clearing the screen), */
 742                 /* else start a new system. */
 743                 if (++pp->system_number > pp->number_of_systems) {
 744                         (void) sleep(1);
 745                         pinit(mi, 1);
 746                 } else {
 747                         pinit(mi, 0);
 748                 }
 749
 750                 glPopMatrix();
 751                 return;
 752         }
 753         pp->counter++;
 754         pp->turncounter++;
 755
 756         /* Do will the direction change? if so, determine the new one */
 757         newdir = pp->nowdir;
 758         if (!pp->directions[newdir]) {  /* cannot proceed in the current direction */
 759                 newdir = SelectNeighbor(mi);
 760         } else {
 761                 if (tightturns) {
 762                         /* random change (20% chance) */
 763                         if ((pp->counter > 1) && (NRAND(100) < 20)) {
 764                                 newdir = SelectNeighbor(mi);
 765                         }
 766                 } else {
 767                         /* Chance to turn increases after each length of pipe drawn */
 768                         if ((pp->counter > 1) && NRAND(50) < NRAND(pp->turncounter + 1)) {
 769                                 newdir = SelectNeighbor(mi);
 770                                 pp->turncounter = 0;
 771                         }
 772                 }
 773         }
 774
 775         /* Has the direction changed? */
 776         if (newdir == pp->nowdir) {
 777                 /* If not, draw the cell's center pipe */
 778                 glPushMatrix();
 779                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0);
 780                 /* Chance of factory shape here, if enabled. */
 781                 if ((pp->counter > 1) && (NRAND(100) < factory)) {
 782                         MakeShape(mi, newdir);
 783                 } else {
 784                         MakeTube(newdir);
 785                 }
 786                 glPopMatrix();
 787         } else {
 788                 /* If so, draw the cell's center elbow/sphere */
 789                 int         sysT = pp->system_type;
 790
 791                 if (sysT == NofSysTypes + 1) {
 792                         sysT = ((pp->system_number - 1) % NofSysTypes) + 1;
 793                 }
 794                 glPushMatrix();
 795
 796                 switch (sysT) {
 797                         case 1:
 798                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0);
 799                                 mySphere(elbowradius);
 800                                 break;
 801                         case 2:
 802                         case 3:
 803                                 switch (pp->nowdir) {
 804                                         case dirUP:
 805                                                 switch (newdir) {
 806                                                         case dirLEFT:
 807                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 - (one_third), (pp->PY - 12) / 3.0 * 4.0 - (one_third), (pp->PZ - 16) / 3.0 * 4.0);
 808                                                                 glRotatef(180.0, 1.0, 0.0, 0.0);
 809                                                                 break;
 810                                                         case dirRIGHT:
 811                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 + (one_third), (pp->PY - 12) / 3.0 * 4.0 - (one_third), (pp->PZ - 16) / 3.0 * 4.0);
 812                                                                 glRotatef(180.0, 1.0, 0.0, 0.0);
 813                                                                 glRotatef(180.0, 0.0, 1.0, 0.0);
 814                                                                 break;
 815                                                         case dirFAR:
 816                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0 - (one_third), (pp->PZ - 16) / 3.0 * 4.0 - (one_third));
 817                                                                 glRotatef(90.0, 0.0, 1.0, 0.0);
 818                                                                 glRotatef(180.0, 0.0, 0.0, 1.0);
 819                                                                 break;
 820                                                         case dirNEAR:
 821                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0 - (one_third), (pp->PZ - 16) / 3.0 * 4.0 + (one_third));
 822                                                                 glRotatef(90.0, 0.0, 1.0, 0.0);
 823                                                                 glRotatef(180.0, 1.0, 0.0, 0.0);
 824                                                                 break;
 825                                                 }
 826                                                 break;
 827                                         case dirDOWN:
 828                                                 switch (newdir) {
 829                                                         case dirLEFT:
 830                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 - (one_third), (pp->PY - 12) / 3.0 * 4.0 + (one_third), (pp->PZ - 16) / 3.0 * 4.0);
 831                                                                 break;
 832                                                         case dirRIGHT:
 833                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 + (one_third), (pp->PY - 12) / 3.0 * 4.0 + (one_third), (pp->PZ - 16) / 3.0 * 4.0);
 834                                                                 glRotatef(180.0, 0.0, 1.0, 0.0);
 835                                                                 break;
 836                                                         case dirFAR:
 837                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0 + (one_third), (pp->PZ - 16) / 3.0 * 4.0 - (one_third));
 838                                                                 glRotatef(270.0, 0.0, 1.0, 0.0);
 839                                                                 break;
 840                                                         case dirNEAR:
 841                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0 + (one_third), (pp->PZ - 16) / 3.0 * 4.0 + (one_third));
 842                                                                 glRotatef(90.0, 0.0, 1.0, 0.0);
 843                                                                 break;
 844                                                 }
 845                                                 break;
 846                                         case dirLEFT:
 847                                                 switch (newdir) {
 848                                                         case dirUP:
 849                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 + (one_third), (pp->PY - 12) / 3.0 * 4.0 + (one_third), (pp->PZ - 16) / 3.0 * 4.0);
 850                                                                 glRotatef(180.0, 0.0, 1.0, 0.0);
 851                                                                 break;
 852                                                         case dirDOWN:
 853                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 + (one_third), (pp->PY - 12) / 3.0 * 4.0 - (one_third), (pp->PZ - 16) / 3.0 * 4.0);
 854                                                                 glRotatef(180.0, 1.0, 0.0, 0.0);
 855                                                                 glRotatef(180.0, 0.0, 1.0, 0.0);
 856                                                                 break;
 857                                                         case dirFAR:
 858                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 + (one_third), (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0 - (one_third));
 859                                                                 glRotatef(270.0, 1.0, 0.0, 0.0);
 860                                                                 glRotatef(180.0, 0.0, 1.0, 0.0);
 861                                                                 break;
 862                                                         case dirNEAR:
 863                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 + (one_third), (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0 + (one_third));
 864                                                                 glRotatef(270.0, 1.0, 0.0, 0.0);
 865                                                                 glRotatef(180.0, 0.0, 0.0, 1.0);
 866                                                                 break;
 867                                                 }
 868                                                 break;
 869                                         case dirRIGHT:
 870                                                 switch (newdir) {
 871                                                         case dirUP:
 872                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 - (one_third), (pp->PY - 12) / 3.0 * 4.0 + (one_third), (pp->PZ - 16) / 3.0 * 4.0);
 873                                                                 break;
 874                                                         case dirDOWN:
 875                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 - (one_third), (pp->PY - 12) / 3.0 * 4.0 - (one_third), (pp->PZ - 16) / 3.0 * 4.0);
 876                                                                 glRotatef(180.0, 1.0, 0.0, 0.0);
 877                                                                 break;
 878                                                         case dirFAR:
 879                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 - (one_third), (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0 - (one_third));
 880                                                                 glRotatef(270.0, 1.0, 0.0, 0.0);
 881                                                                 break;
 882                                                         case dirNEAR:
 883                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 - (one_third), (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0 + (one_third));
 884                                                                 glRotatef(90.0, 1.0, 0.0, 0.0);
 885                                                                 break;
 886                                                 }
 887                                                 break;
 888                                         case dirNEAR:
 889                                                 switch (newdir) {
 890                                                         case dirLEFT:
 891                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 - (one_third), (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0 - (one_third));
 892                                                                 glRotatef(270.0, 1.0, 0.0, 0.0);
 893                                                                 break;
 894                                                         case dirRIGHT:
 895                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 + (one_third), (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0 - (one_third));
 896                                                                 glRotatef(270.0, 1.0, 0.0, 0.0);
 897                                                                 glRotatef(180.0, 0.0, 1.0, 0.0);
 898                                                                 break;
 899                                                         case dirUP:
 900                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0 + (one_third), (pp->PZ - 16) / 3.0 * 4.0 - (one_third));
 901                                                                 glRotatef(270.0, 0.0, 1.0, 0.0);
 902                                                                 break;
 903                                                         case dirDOWN:
 904                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0 - (one_third), (pp->PZ - 16) / 3.0 * 4.0 - (one_third));
 905                                                                 glRotatef(90.0, 0.0, 1.0, 0.0);
 906                                                                 glRotatef(180.0, 0.0, 0.0, 1.0);
 907                                                                 break;
 908                                                 }
 909                                                 break;
 910                                         case dirFAR:
 911                                                 switch (newdir) {
 912                                                         case dirUP:
 913                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0 + (one_third), (pp->PZ - 16) / 3.0 * 4.0 + (one_third));
 914                                                                 glRotatef(90.0, 0.0, 1.0, 0.0);
 915                                                                 break;
 916                                                         case dirDOWN:
 917                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0 - (one_third), (pp->PZ - 16) / 3.0 * 4.0 + (one_third));
 918                                                                 glRotatef(90.0, 0.0, 1.0, 0.0);
 919                                                                 glRotatef(180.0, 1.0, 0.0, 0.0);
 920                                                                 break;
 921                                                         case dirLEFT:
 922                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 - (one_third), (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0 + (one_third));
 923                                                                 glRotatef(90.0, 1.0, 0.0, 0.0);
 924                                                                 break;
 925                                                         case dirRIGHT:
 926                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 + (one_third), (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0 + (one_third));
 927                                                                 glRotatef(270.0, 1.0, 0.0, 0.0);
 928                                                                 glRotatef(180.0, 0.0, 0.0, 1.0);
 929                                                                 break;
 930                                                 }
 931                                                 break;
 932                                 }
 933                                 myElbow(mi, (sysT == 2));
 934                                 break;
 935                 }
 936                 glPopMatrix();
 937         }
 938
 939         OPX = pp->PX;
 940         OPY = pp->PY;
 941         OPZ = pp->PZ;
 942         pp->olddir = pp->nowdir;
 943         pp->nowdir = newdir;
 944         switch (pp->nowdir) {
 945                 case dirUP:
 946                         pp->PY++;
 947                         break;
 948                 case dirDOWN:
 949                         pp->PY--;
 950                         break;
 951                 case dirLEFT:
 952                         pp->PX--;
 953                         break;
 954                 case dirRIGHT:
 955                         pp->PX++;
 956                         break;
 957                 case dirNEAR:
 958                         pp->PZ++;
 959                         break;
 960                 case dirFAR:
 961                         pp->PZ--;
 962                         break;
 963         }
 964         pp->Cells[pp->PX][pp->PY][pp->PZ] = 1;
 965
 966         /* Cells'face pipe */
 967         glTranslatef(((pp->PX + OPX) / 2.0 - 16) / 3.0 * 4.0, ((pp->PY + OPY) / 2.0 - 12) / 3.0 * 4.0, ((pp->PZ + OPZ) / 2.0 - 16) / 3.0 * 4.0);
 968         MakeTube(newdir);
 969
 970         glPopMatrix();
 971
 972         glFlush();
 973
 974 #if defined( MESA ) && defined( SLOW )
 975         pp->flip = !pp->flip;
 976         if (pp->flip)
 977                 glXSwapBuffers(display, window);
 978 #endif
 979 }
 980
 981 void
 982 change_pipes(ModeInfo * mi)
 983 {
 984         pipesstruct *pp = &pipes[MI_SCREEN(mi)];
 985
 986         if (!pp->glx_context)
 987                 return;
 988
 989         glXMakeCurrent(MI_DISPLAY(mi), MI_WINDOW(mi), *(pp->glx_context));
 990         pinit(mi, 1);
 991 }
 992
 993 void
 994 release_pipes(ModeInfo * mi)
 995 {
 996         if (pipes != NULL) {
 997                 int         screen;
 998
 999                 for (screen = 0; screen < MI_NUM_SCREENS(mi); screen++) {
1000                         pipesstruct *pp = &pipes[screen];
1001
1002                         if (pp->glx_context) {
1003
1004                                 /* Display lists MUST be freed while their glXContext is current. */
1005                                 glXMakeCurrent(MI_DISPLAY(mi), pp->window, *(pp->glx_context));
1006
1007                                 if (pp->valve)
1008                                         glDeleteLists(pp->valve, 1);
1009                                 if (pp->bolts)
1010                                         glDeleteLists(pp->bolts, 1);
1011                                 if (pp->betweenbolts)
1012                                         glDeleteLists(pp->betweenbolts, 1);
1013
1014                                 if (pp->elbowbolts)
1015                                         glDeleteLists(pp->elbowbolts, 1);
1016                                 if (pp->elbowcoins)
1017                                         glDeleteLists(pp->elbowcoins, 1);
1018
1019                                 if (pp->guagehead)
1020                                         glDeleteLists(pp->guagehead, 1);
1021                                 if (pp->guageface)
1022                                         glDeleteLists(pp->guageface, 1);
1023                                 if (pp->guagedial)
1024                                         glDeleteLists(pp->guagedial, 1);
1025                                 if (pp->guageconnector)
1026                                         glDeleteLists(pp->guageconnector, 1);
1027                         }
1028                 }
1029
1030                 (void) free((void *) pipes);
1031                 pipes = NULL;
1032         }
1033         FreeAllGL(mi);
1034 }
1035
1036 #endif