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