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