git.hungrycats.org Git - xscreensaver/blob - hacks/glx/morph3d.c

   1 /* -*- Mode: C; tab-width: 4 -*- */
   2 /* morph3d --- Shows 3D morphing objects */
   3
   4 #if !defined( lint ) && !defined( SABER )
   5 static const char sccsid[] = "@(#)morph3d.c     4.07 97/11/24 xlockmore";
   6
   7 #endif
   8
   9 #undef DEBUG_CULL_FACE
  10
  11 /*-
  12  * Permission to use, copy, modify, and distribute this software and its
  13  * documentation for any purpose and without fee is hereby granted,
  14  * provided that the above copyright notice appear in all copies and that
  15  * both that copyright notice and this permission notice appear in
  16  * supporting documentation.
  17  *
  18  * This file is provided AS IS with no warranties of any kind.  The author
  19  * shall have no liability with respect to the infringement of copyrights,
  20  * trade secrets or any patents by this file or any part thereof.  In no
  21  * event will the author be liable for any lost revenue or profits or
  22  * other special, indirect and consequential damages.
  23  *
  24  * The original code for this mode was written by Marcelo Fernandes Vianna
  25  * (me...) and was inspired on a WindowsNT(R)'s screen saver (Flower Box).
  26  * It was written from scratch and it was not based on any other source code.
  27  *
  28  * Porting it to xlock (the final objective of this code since the moment I
  29  * decided to create it) was possible by comparing the original Mesa's gear
  30  * demo with it's ported version to xlock, so thanks for Danny Sung (look at
  31  * gear.c) for his indirect help.
  32  *
  33  * Thanks goes also to Brian Paul for making it possible and inexpensive
  34  * to use OpenGL at home.
  35  *
  36  * If you are interested in the original version of this program (not a xlock
  37  * mode, please refer to the Mesa package (ftp iris.ssec.wisc.edu on /pub/Mesa)
  38  *
  39  * Since I'm not a native English speaker, my apologies for any grammatical
  40  * mistake.
  41  *
  42  * My e-mail address is
  43  * m-vianna@usa.net
  44  *
  45  * Marcelo F. Vianna (Feb-13-1997)
  46  *
  47  * Revision History:
  48  * 27-Jul-97: Speed ups by Marcelo F. Vianna.
  49  * 08-May-97: Speed ups by Marcelo F. Vianna.
  50  *
  51  */
  52
  53 /*-
  54  * PURIFY 3.0a on SunOS4 reports an unitialized memory read on each of
  55  * the glCallList() functions below when using MesaGL 2.1.  This has
  56  * been fixed in MesaGL 2.2 and later releases.
  57  */
  58
  59 /*-
  60  * due to a Bug/feature in VMS X11/Intrinsic.h has to be placed before xlock.
  61  * otherwise caddr_t is not defined correctly
  62  */
  63
  64 #include <X11/Intrinsic.h>
  65
  66 #ifdef STANDALONE
  67 # define PROGCLASS              "Morph3d"
  68 # define HACK_INIT              init_morph3d
  69 # define HACK_DRAW              draw_morph3d
  70 # define morph3d_opts           xlockmore_opts
  71 # define DEFAULTS               "*delay: 40000 \n" \
  72                                 "*count: 0 \n"
  73 # include "xlockmore.h"         /* from the xscreensaver distribution */
  74 #else /* !STANDALONE */
  75 # include "xlock.h"             /* from the xlockmore distribution */
  76 #endif /* !STANDALONE */
  77
  78 #ifdef USE_GL
  79
  80 ModeSpecOpt morph3d_opts =
  81 {0, NULL, 0, NULL, NULL};
  82
  83 #ifdef USE_MODULES
  84 ModStruct   morph3d_description =
  85 {"morph3d", "init_morph3d", "draw_morph3d", "release_morph3d",
  86  "draw_morph3d", "change_morph3d", NULL, &morph3d_opts,
  87  1000, 0, 1, 1, 4, 1.0, "",
  88  "Shows GL morphing polyhedra", 0, NULL};
  89
  90 #endif
  91
  92 #define Scale4Window               0.3
  93 #define Scale4Iconic               1.0
  94
  95 #define VectMul(X1,Y1,Z1,X2,Y2,Z2) (Y1)*(Z2)-(Z1)*(Y2),(Z1)*(X2)-(X1)*(Z2),(X1)*(Y2)-(Y1)*(X2)
  96 #define sqr(A)                     ((A)*(A))
  97
  98 /* Increasing this values produces better image quality, the price is speed. */
  99 #define tetradivisions             23
 100 #define cubedivisions              20
 101 #define octadivisions              21
 102 #define dodecadivisions            10
 103 #define icodivisions               15
 104
 105 #define tetraangle                 109.47122063449069174
 106 #define cubeangle                  90.000000000000000000
 107 #define octaangle                  109.47122063449069174
 108 #define dodecaangle                63.434948822922009981
 109 #define icoangle                   41.810314895778596167
 110
 111 #ifndef Pi
 112 #define Pi                         M_PI
 113 #endif
 114 #define SQRT2                      1.4142135623730951455
 115 #define SQRT3                      1.7320508075688771932
 116 #define SQRT5                      2.2360679774997898051
 117 #define SQRT6                      2.4494897427831778813
 118 #define SQRT15                     3.8729833462074170214
 119 #define cossec36_2                 0.8506508083520399322
 120 #define cos72                      0.3090169943749474241
 121 #define sin72                      0.9510565162951535721
 122 #define cos36                      0.8090169943749474241
 123 #define sin36                      0.5877852522924731292
 124
 125 /*************************************************************************/
 126
 127 typedef struct {
 128         GLint       WindH, WindW;
 129         GLfloat     step;
 130         GLfloat     seno;
 131         int         object;
 132         int         edgedivisions;
 133         int         VisibleSpikes;
 134         void        (*draw_object) (ModeInfo * mi);
 135         float       Magnitude;
 136         float      *MaterialColor[20];
 137         GLXContext *glx_context;
 138 } morph3dstruct;
 139
 140 static float front_shininess[] =
 141 {60.0};
 142 static float front_specular[] =
 143 {0.7, 0.7, 0.7, 1.0};
 144 static float ambient[] =
 145 {0.0, 0.0, 0.0, 1.0};
 146 static float diffuse[] =
 147 {1.0, 1.0, 1.0, 1.0};
 148 static float position0[] =
 149 {1.0, 1.0, 1.0, 0.0};
 150 static float position1[] =
 151 {-1.0, -1.0, 1.0, 0.0};
 152 static float lmodel_ambient[] =
 153 {0.5, 0.5, 0.5, 1.0};
 154 static float lmodel_twoside[] =
 155 {GL_TRUE};
 156
 157 static float MaterialRed[] =
 158 {0.7, 0.0, 0.0, 1.0};
 159 static float MaterialGreen[] =
 160 {0.1, 0.5, 0.2, 1.0};
 161 static float MaterialBlue[] =
 162 {0.0, 0.0, 0.7, 1.0};
 163 static float MaterialCyan[] =
 164 {0.2, 0.5, 0.7, 1.0};
 165 static float MaterialYellow[] =
 166 {0.7, 0.7, 0.0, 1.0};
 167 static float MaterialMagenta[] =
 168 {0.6, 0.2, 0.5, 1.0};
 169 static float MaterialWhite[] =
 170 {0.7, 0.7, 0.7, 1.0};
 171 static float MaterialGray[] =
 172 {0.5, 0.5, 0.5, 1.0};
 173
 174 static morph3dstruct *morph3d = NULL;
 175
 176 #define TRIANGLE(Edge, Amp, Divisions, Z, VS)                                                                    \
 177 {                                                                                                                \
 178   GLfloat   Xf,Yf,Xa,Yb,Xf2,Yf2,Yf_2,Yb2,Yb_2;                                                                   \
 179   GLfloat   Factor=0.0,Factor1,Factor2;                                                                          \
 180   GLfloat   VertX,VertY,VertZ,NeiAX,NeiAY,NeiAZ,NeiBX,NeiBY,NeiBZ;                                               \
 181   GLfloat   Ax,Ay;                                                                                               \
 182   int       Ri,Ti;                                                                                               \
 183   GLfloat   Vr=(Edge)*SQRT3/3;                                                                                   \
 184   GLfloat   AmpVr2=(Amp)/sqr(Vr);                                                                                \
 185   GLfloat   Zf=(Edge)*(Z);                                                                                       \
 186                                                                                                                  \
 187   Ax=(Edge)*(+0.5/(Divisions)), Ay=(Edge)*(-SQRT3/(2*Divisions));                                                \
 188                                                                                                                  \
 189   Yf=Vr+Ay; Yb=Yf+0.001;                                                                                         \
 190   for (Ri=1; Ri<=(Divisions); Ri++) {                                                                            \
 191     glBegin(GL_TRIANGLE_STRIP);                                                                                  \
 192     Xf=(float)Ri*Ax; Xa=Xf+0.001;                                                                                \
 193     Yf2=sqr(Yf); Yf_2=sqr(Yf-Ay);                                                                                \
 194     Yb2=sqr(Yb); Yb_2=sqr(Yb-Ay);                                                                                \
 195     for (Ti=0; Ti<Ri; Ti++) {                                                                                    \
 196       Factor=1-(((Xf2=sqr(Xf))+Yf2)*AmpVr2);                                                                     \
 197       Factor1=1-((sqr(Xa)+Yf2)*AmpVr2);                                                                          \
 198       Factor2=1-((Xf2+Yb2)*AmpVr2);                                                                              \
 199       VertX=Factor*Xf;        VertY=Factor*Yf;        VertZ=Factor*Zf;                                           \
 200       NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Yf-VertY; NeiAZ=Factor1*Zf-VertZ;                                    \
 201       NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                    \
 202       glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                             \
 203       glVertex3f(VertX, VertY, VertZ);                                                                           \
 204                                                                                                                  \
 205       Xf-=Ax; Yf-=Ay; Xa-=Ax; Yb-=Ay;                                                                            \
 206                                                                                                                  \
 207       Factor=1-(((Xf2=sqr(Xf))+Yf_2)*AmpVr2);                                                                    \
 208       Factor1=1-((sqr(Xa)+Yf_2)*AmpVr2);                                                                         \
 209       Factor2=1-((Xf2+Yb_2)*AmpVr2);                                                                             \
 210       VertX=Factor*Xf;        VertY=Factor*Yf;        VertZ=Factor*Zf;                                           \
 211       NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Yf-VertY; NeiAZ=Factor1*Zf-VertZ;                                    \
 212       NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                    \
 213       glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                             \
 214       glVertex3f(VertX, VertY, VertZ);                                                                           \
 215                                                                                                                  \
 216       Xf-=Ax; Yf+=Ay; Xa-=Ax; Yb+=Ay;                                                                            \
 217     }                                                                                                            \
 218     Factor=1-(((Xf2=sqr(Xf))+(Yf2=sqr(Yf)))*AmpVr2);                                                             \
 219     Factor1=1-((sqr(Xa)+Yf2)*AmpVr2);                                                                            \
 220     Factor2=1-((Xf2+sqr(Yb))*AmpVr2);                                                                            \
 221     VertX=Factor*Xf;        VertY=Factor*Yf;        VertZ=Factor*Zf;                                             \
 222     NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Yf-VertY; NeiAZ=Factor1*Zf-VertZ;                                      \
 223     NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                      \
 224     glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                               \
 225     glVertex3f(VertX, VertY, VertZ);                                                                             \
 226     Yf+=Ay; Yb+=Ay;                                                                                              \
 227     glEnd();                                                                                                     \
 228   }                                                                                                              \
 229   VS=(Factor<0);                                                                                                 \
 230 }
 231
 232 #define SQUARE(Edge, Amp, Divisions, Z, VS)                                                                      \
 233 {                                                                                                                \
 234   int       Xi,Yi;                                                                                               \
 235   GLfloat   Xf,Yf,Y,Xf2,Yf2,Y2,Xa,Xa2,Yb;                                                                        \
 236   GLfloat   Factor=0.0,Factor1,Factor2;                                                                          \
 237   GLfloat   VertX,VertY,VertZ,NeiAX,NeiAY,NeiAZ,NeiBX,NeiBY,NeiBZ;                                               \
 238   GLfloat   Zf=(Edge)*(Z);                                                                                       \
 239   GLfloat   AmpVr2=(Amp)/sqr((Edge)*SQRT2/2);                                                                    \
 240                                                                                                                  \
 241   for (Yi=0; Yi<(Divisions); Yi++) {                                                                             \
 242     Yf=-((Edge)/2.0) + ((float)Yi)/(Divisions)*(Edge);                                                           \
 243     Yf2=sqr(Yf);                                                                                                 \
 244     Y=Yf+1.0/(Divisions)*(Edge);                                                                                 \
 245     Y2=sqr(Y);                                                                                                   \
 246     glBegin(GL_QUAD_STRIP);                                                                                      \
 247     for (Xi=0; Xi<=(Divisions); Xi++) {                                                                          \
 248       Xf=-((Edge)/2.0) + ((float)Xi)/(Divisions)*(Edge);                                                         \
 249       Xf2=sqr(Xf);                                                                                               \
 250                                                                                                                  \
 251       Xa=Xf+0.001; Yb=Y+0.001;                                                                                   \
 252       Factor=1-((Xf2+Y2)*AmpVr2);                                                                                \
 253       Factor1=1-(((Xa2=sqr(Xa))+Y2)*AmpVr2);                                                                     \
 254       Factor2=1-((Xf2+sqr(Yb))*AmpVr2);                                                                          \
 255       VertX=Factor*Xf;        VertY=Factor*Y;         VertZ=Factor*Zf;                                           \
 256       NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Y-VertY;  NeiAZ=Factor1*Zf-VertZ;                                    \
 257       NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                    \
 258       glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                             \
 259       glVertex3f(VertX, VertY, VertZ);                                                                           \
 260                                                                                                                  \
 261       Yb=Yf+0.001;                                                                                               \
 262       Factor=1-((Xf2+Yf2)*AmpVr2);                                                                               \
 263       Factor1=1-((Xa2+Yf2)*AmpVr2);                                                                              \
 264       Factor2=1-((Xf2+sqr(Yb))*AmpVr2);                                                                          \
 265       VertX=Factor*Xf;        VertY=Factor*Yf;        VertZ=Factor*Zf;                                           \
 266       NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Yf-VertY; NeiAZ=Factor1*Zf-VertZ;                                    \
 267       NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                    \
 268       glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                             \
 269       glVertex3f(VertX, VertY, VertZ);                                                                           \
 270     }                                                                                                            \
 271     glEnd();                                                                                                     \
 272   }                                                                                                              \
 273   VS=(Factor<0);                                                                                                 \
 274 }
 275
 276 #define PENTAGON(Edge, Amp, Divisions, Z, VS)                                                                    \
 277 {                                                                                                                \
 278   int       Ri,Ti,Fi;                                                                                            \
 279   GLfloat   Xf,Yf,Xa,Yb,Xf2,Yf2;                                                                                 \
 280   GLfloat   Factor=0.0,Factor1,Factor2;                                                                          \
 281   GLfloat   VertX,VertY,VertZ,NeiAX,NeiAY,NeiAZ,NeiBX,NeiBY,NeiBZ;                                               \
 282   GLfloat   Zf=(Edge)*(Z);                                                                                       \
 283   GLfloat   AmpVr2=(Amp)/sqr((Edge)*cossec36_2);                                                                 \
 284                                                                                                                  \
 285   static    GLfloat x[6],y[6];                                                                                   \
 286   static    int arrayninit=1;                                                                                    \
 287                                                                                                                  \
 288   if (arrayninit) {                                                                                              \
 289     for(Fi=0;Fi<6;Fi++) {                                                                                        \
 290       x[Fi]=-cos( Fi*2*Pi/5 + Pi/10 )/(Divisions)*cossec36_2*(Edge);                                             \
 291       y[Fi]=sin( Fi*2*Pi/5 + Pi/10 )/(Divisions)*cossec36_2*(Edge);                                              \
 292     }                                                                                                            \
 293     arrayninit=0;                                                                                                \
 294   }                                                                                                              \
 295                                                                                                                  \
 296   for (Ri=1; Ri<=(Divisions); Ri++) {                                                                            \
 297     for (Fi=0; Fi<5; Fi++) {                                                                                     \
 298       glBegin(GL_TRIANGLE_STRIP);                                                                                \
 299       for (Ti=0; Ti<Ri; Ti++) {                                                                                  \
 300         Xf=(float)(Ri-Ti)*x[Fi] + (float)Ti*x[Fi+1];                                                             \
 301         Yf=(float)(Ri-Ti)*y[Fi] + (float)Ti*y[Fi+1];                                                             \
 302         Xa=Xf+0.001; Yb=Yf+0.001;                                                                                \
 303         Factor=1-(((Xf2=sqr(Xf))+(Yf2=sqr(Yf)))*AmpVr2);                                                         \
 304         Factor1=1-((sqr(Xa)+Yf2)*AmpVr2);                                                                        \
 305         Factor2=1-((Xf2+sqr(Yb))*AmpVr2);                                                                        \
 306         VertX=Factor*Xf;        VertY=Factor*Yf;        VertZ=Factor*Zf;                                         \
 307         NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Yf-VertY; NeiAZ=Factor1*Zf-VertZ;                                  \
 308         NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                  \
 309         glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                           \
 310         glVertex3f(VertX, VertY, VertZ);                                                                         \
 311                                                                                                                  \
 312         Xf-=x[Fi]; Yf-=y[Fi]; Xa-=x[Fi]; Yb-=y[Fi];                                                              \
 313                                                                                                                  \
 314         Factor=1-(((Xf2=sqr(Xf))+(Yf2=sqr(Yf)))*AmpVr2);                                                         \
 315         Factor1=1-((sqr(Xa)+Yf2)*AmpVr2);                                                                        \
 316         Factor2=1-((Xf2+sqr(Yb))*AmpVr2);                                                                        \
 317         VertX=Factor*Xf;        VertY=Factor*Yf;        VertZ=Factor*Zf;                                         \
 318         NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Yf-VertY; NeiAZ=Factor1*Zf-VertZ;                                  \
 319         NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                  \
 320         glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                           \
 321         glVertex3f(VertX, VertY, VertZ);                                                                         \
 322                                                                                                                  \
 323       }                                                                                                          \
 324       Xf=(float)Ri*x[Fi+1];                                                                                      \
 325       Yf=(float)Ri*y[Fi+1];                                                                                      \
 326       Xa=Xf+0.001; Yb=Yf+0.001;                                                                                  \
 327       Factor=1-(((Xf2=sqr(Xf))+(Yf2=sqr(Yf)))*AmpVr2);                                                           \
 328       Factor1=1-((sqr(Xa)+Yf2)*AmpVr2);                                                                          \
 329       Factor2=1-((Xf2+sqr(Yb))*AmpVr2);                                                                          \
 330       VertX=Factor*Xf;        VertY=Factor*Yf;        VertZ=Factor*Zf;                                           \
 331       NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Yf-VertY; NeiAZ=Factor1*Zf-VertZ;                                    \
 332       NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                    \
 333       glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                             \
 334       glVertex3f(VertX, VertY, VertZ);                                                                           \
 335       glEnd();                                                                                                   \
 336     }                                                                                                            \
 337   }                                                                                                              \
 338   VS=(Factor<0);                                                                                             \
 339 }
 340
 341 static void
 342 draw_tetra(ModeInfo * mi)
 343 {
 344         GLuint      list;
 345
 346         morph3dstruct *mp = &morph3d[MI_SCREEN(mi)];
 347
 348         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[0]);
 349
 350         list = glGenLists(1);
 351         glNewList(list, GL_COMPILE_AND_EXECUTE);
 352         TRIANGLE(2, mp->seno, mp->edgedivisions, 0.5 / SQRT6, mp->VisibleSpikes);
 353         glEndList();
 354
 355         glPushMatrix();
 356         glRotatef(180, 0, 0, 1);
 357         glRotatef(-tetraangle, 1, 0, 0);
 358         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[1]);
 359         glCallList(list);
 360         glPopMatrix();
 361         glPushMatrix();
 362         glRotatef(180, 0, 1, 0);
 363         glRotatef(-180 + tetraangle, 0.5, SQRT3 / 2, 0);
 364         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[2]);
 365         glCallList(list);
 366         glPopMatrix();
 367         glRotatef(180, 0, 1, 0);
 368         glRotatef(-180 + tetraangle, 0.5, -SQRT3 / 2, 0);
 369         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[3]);
 370         glCallList(list);
 371
 372         glDeleteLists(list, 1);
 373 }
 374
 375 static void
 376 draw_cube(ModeInfo * mi)
 377 {
 378         GLuint      list;
 379
 380         morph3dstruct *mp = &morph3d[MI_SCREEN(mi)];
 381
 382
 383         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[0]);
 384
 385         list = glGenLists(1);
 386         glNewList(list, GL_COMPILE_AND_EXECUTE);
 387         SQUARE(2, mp->seno, mp->edgedivisions, 0.5, mp->VisibleSpikes)
 388                 glEndList();
 389
 390         glRotatef(cubeangle, 1, 0, 0);
 391         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[1]);
 392         glCallList(list);
 393         glRotatef(cubeangle, 1, 0, 0);
 394         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[2]);
 395         glCallList(list);
 396         glRotatef(cubeangle, 1, 0, 0);
 397         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[3]);
 398         glCallList(list);
 399         glRotatef(cubeangle, 0, 1, 0);
 400         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[4]);
 401         glCallList(list);
 402         glRotatef(2 * cubeangle, 0, 1, 0);
 403         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[5]);
 404         glCallList(list);
 405
 406         glDeleteLists(list, 1);
 407 }
 408
 409 static void
 410 draw_octa(ModeInfo * mi)
 411 {
 412         GLuint      list;
 413
 414         morph3dstruct *mp = &morph3d[MI_SCREEN(mi)];
 415
 416         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[0]);
 417
 418         list = glGenLists(1);
 419         glNewList(list, GL_COMPILE_AND_EXECUTE);
 420         TRIANGLE(2, mp->seno, mp->edgedivisions, 1 / SQRT6, mp->VisibleSpikes);
 421         glEndList();
 422
 423         glPushMatrix();
 424         glRotatef(180, 0, 0, 1);
 425         glRotatef(-180 + octaangle, 1, 0, 0);
 426         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[1]);
 427         glCallList(list);
 428         glPopMatrix();
 429         glPushMatrix();
 430         glRotatef(180, 0, 1, 0);
 431         glRotatef(-octaangle, 0.5, SQRT3 / 2, 0);
 432         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[2]);
 433         glCallList(list);
 434         glPopMatrix();
 435         glPushMatrix();
 436         glRotatef(180, 0, 1, 0);
 437         glRotatef(-octaangle, 0.5, -SQRT3 / 2, 0);
 438         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[3]);
 439         glCallList(list);
 440         glPopMatrix();
 441         glRotatef(180, 1, 0, 0);
 442         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[4]);
 443         glCallList(list);
 444         glPushMatrix();
 445         glRotatef(180, 0, 0, 1);
 446         glRotatef(-180 + octaangle, 1, 0, 0);
 447         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[5]);
 448         glCallList(list);
 449         glPopMatrix();
 450         glPushMatrix();
 451         glRotatef(180, 0, 1, 0);
 452         glRotatef(-octaangle, 0.5, SQRT3 / 2, 0);
 453         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[6]);
 454         glCallList(list);
 455         glPopMatrix();
 456         glRotatef(180, 0, 1, 0);
 457         glRotatef(-octaangle, 0.5, -SQRT3 / 2, 0);
 458         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[7]);
 459         glCallList(list);
 460
 461         glDeleteLists(list, 1);
 462 }
 463
 464 static void
 465 draw_dodeca(ModeInfo * mi)
 466 {
 467         GLuint      list;
 468
 469         morph3dstruct *mp = &morph3d[MI_SCREEN(mi)];
 470
 471 #define TAU ((SQRT5+1)/2)
 472
 473         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[0]);
 474
 475         list = glGenLists(1);
 476         glNewList(list, GL_COMPILE_AND_EXECUTE);
 477         PENTAGON(1, mp->seno, mp->edgedivisions, sqr(TAU) * sqrt((TAU + 2) / 5) / 2, mp->VisibleSpikes);
 478         glEndList();
 479
 480         glPushMatrix();
 481         glRotatef(180, 0, 0, 1);
 482         glPushMatrix();
 483         glRotatef(-dodecaangle, 1, 0, 0);
 484         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[1]);
 485         glCallList(list);
 486         glPopMatrix();
 487         glPushMatrix();
 488         glRotatef(-dodecaangle, cos72, sin72, 0);
 489         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[2]);
 490         glCallList(list);
 491         glPopMatrix();
 492         glPushMatrix();
 493         glRotatef(-dodecaangle, cos72, -sin72, 0);
 494         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[3]);
 495         glCallList(list);
 496         glPopMatrix();
 497         glPushMatrix();
 498         glRotatef(dodecaangle, cos36, -sin36, 0);
 499         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[4]);
 500         glCallList(list);
 501         glPopMatrix();
 502         glRotatef(dodecaangle, cos36, sin36, 0);
 503         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[5]);
 504         glCallList(list);
 505         glPopMatrix();
 506         glRotatef(180, 1, 0, 0);
 507         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[6]);
 508         glCallList(list);
 509         glRotatef(180, 0, 0, 1);
 510         glPushMatrix();
 511         glRotatef(-dodecaangle, 1, 0, 0);
 512         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[7]);
 513         glCallList(list);
 514         glPopMatrix();
 515         glPushMatrix();
 516         glRotatef(-dodecaangle, cos72, sin72, 0);
 517         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[8]);
 518         glCallList(list);
 519         glPopMatrix();
 520         glPushMatrix();
 521         glRotatef(-dodecaangle, cos72, -sin72, 0);
 522         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[9]);
 523         glCallList(list);
 524         glPopMatrix();
 525         glPushMatrix();
 526         glRotatef(dodecaangle, cos36, -sin36, 0);
 527         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[10]);
 528         glCallList(list);
 529         glPopMatrix();
 530         glRotatef(dodecaangle, cos36, sin36, 0);
 531         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[11]);
 532         glCallList(list);
 533
 534         glDeleteLists(list, 1);
 535 }
 536
 537 static void
 538 draw_icosa(ModeInfo * mi)
 539 {
 540         GLuint      list;
 541
 542         morph3dstruct *mp = &morph3d[MI_SCREEN(mi)];
 543
 544         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[0]);
 545
 546         list = glGenLists(1);
 547         glNewList(list, GL_COMPILE_AND_EXECUTE);
 548         TRIANGLE(1.5, mp->seno, mp->edgedivisions, (3 * SQRT3 + SQRT15) / 12, mp->VisibleSpikes);
 549         glEndList();
 550
 551         glPushMatrix();
 552
 553         glPushMatrix();
 554         glRotatef(180, 0, 0, 1);
 555         glRotatef(-icoangle, 1, 0, 0);
 556         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[1]);
 557         glCallList(list);
 558         glPushMatrix();
 559         glRotatef(180, 0, 1, 0);
 560         glRotatef(-180 + icoangle, 0.5, SQRT3 / 2, 0);
 561         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[2]);
 562         glCallList(list);
 563         glPopMatrix();
 564         glRotatef(180, 0, 1, 0);
 565         glRotatef(-180 + icoangle, 0.5, -SQRT3 / 2, 0);
 566         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[3]);
 567         glCallList(list);
 568         glPopMatrix();
 569         glPushMatrix();
 570         glRotatef(180, 0, 1, 0);
 571         glRotatef(-180 + icoangle, 0.5, SQRT3 / 2, 0);
 572         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[4]);
 573         glCallList(list);
 574         glPushMatrix();
 575         glRotatef(180, 0, 1, 0);
 576         glRotatef(-180 + icoangle, 0.5, SQRT3 / 2, 0);
 577         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[5]);
 578         glCallList(list);
 579         glPopMatrix();
 580         glRotatef(180, 0, 0, 1);
 581         glRotatef(-icoangle, 1, 0, 0);
 582         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[6]);
 583         glCallList(list);
 584         glPopMatrix();
 585         glRotatef(180, 0, 1, 0);
 586         glRotatef(-180 + icoangle, 0.5, -SQRT3 / 2, 0);
 587         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[7]);
 588         glCallList(list);
 589         glPushMatrix();
 590         glRotatef(180, 0, 1, 0);
 591         glRotatef(-180 + icoangle, 0.5, -SQRT3 / 2, 0);
 592         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[8]);
 593         glCallList(list);
 594         glPopMatrix();
 595         glRotatef(180, 0, 0, 1);
 596         glRotatef(-icoangle, 1, 0, 0);
 597         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[9]);
 598         glCallList(list);
 599         glPopMatrix();
 600         glRotatef(180, 1, 0, 0);
 601         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[10]);
 602         glCallList(list);
 603         glPushMatrix();
 604         glRotatef(180, 0, 0, 1);
 605         glRotatef(-icoangle, 1, 0, 0);
 606         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[11]);
 607         glCallList(list);
 608         glPushMatrix();
 609         glRotatef(180, 0, 1, 0);
 610         glRotatef(-180 + icoangle, 0.5, SQRT3 / 2, 0);
 611         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[12]);
 612         glCallList(list);
 613         glPopMatrix();
 614         glRotatef(180, 0, 1, 0);
 615         glRotatef(-180 + icoangle, 0.5, -SQRT3 / 2, 0);
 616         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[13]);
 617         glCallList(list);
 618         glPopMatrix();
 619         glPushMatrix();
 620         glRotatef(180, 0, 1, 0);
 621         glRotatef(-180 + icoangle, 0.5, SQRT3 / 2, 0);
 622         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[14]);
 623         glCallList(list);
 624         glPushMatrix();
 625         glRotatef(180, 0, 1, 0);
 626         glRotatef(-180 + icoangle, 0.5, SQRT3 / 2, 0);
 627         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[15]);
 628         glCallList(list);
 629         glPopMatrix();
 630         glRotatef(180, 0, 0, 1);
 631         glRotatef(-icoangle, 1, 0, 0);
 632         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[16]);
 633         glCallList(list);
 634         glPopMatrix();
 635         glRotatef(180, 0, 1, 0);
 636         glRotatef(-180 + icoangle, 0.5, -SQRT3 / 2, 0);
 637         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[17]);
 638         glCallList(list);
 639         glPushMatrix();
 640         glRotatef(180, 0, 1, 0);
 641         glRotatef(-180 + icoangle, 0.5, -SQRT3 / 2, 0);
 642         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[18]);
 643         glCallList(list);
 644         glPopMatrix();
 645         glRotatef(180, 0, 0, 1);
 646         glRotatef(-icoangle, 1, 0, 0);
 647         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[19]);
 648         glCallList(list);
 649
 650         glDeleteLists(list, 1);
 651 }
 652
 653 static void
 654 reshape(ModeInfo * mi, int width, int height)
 655 {
 656         morph3dstruct *mp = &morph3d[MI_SCREEN(mi)];
 657
 658         glViewport(0, 0, mp->WindW = (GLint) width, mp->WindH = (GLint) height);
 659         glMatrixMode(GL_PROJECTION);
 660         glLoadIdentity();
 661         glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 15.0);
 662         glMatrixMode(GL_MODELVIEW);
 663 }
 664
 665 static void
 666 pinit(ModeInfo * mi)
 667 {
 668         morph3dstruct *mp = &morph3d[MI_SCREEN(mi)];
 669
 670         glClearDepth(1.0);
 671         glClearColor(0.0, 0.0, 0.0, 1.0);
 672         glColor3f(1.0, 1.0, 1.0);
 673
 674         glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
 675         glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
 676         glLightfv(GL_LIGHT0, GL_POSITION, position0);
 677         glLightfv(GL_LIGHT1, GL_AMBIENT, ambient);
 678         glLightfv(GL_LIGHT1, GL_DIFFUSE, diffuse);
 679         glLightfv(GL_LIGHT1, GL_POSITION, position1);
 680         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
 681         glLightModelfv(GL_LIGHT_MODEL_TWO_SIDE, lmodel_twoside);
 682         glEnable(GL_LIGHTING);
 683         glEnable(GL_LIGHT0);
 684         glEnable(GL_LIGHT1);
 685         glEnable(GL_DEPTH_TEST);
 686         glEnable(GL_NORMALIZE);
 687
 688         glShadeModel(GL_SMOOTH);
 689         glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, front_shininess);
 690         glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, front_specular);
 691
 692         switch (mp->object) {
 693                 case 2:
 694                         mp->draw_object = draw_cube;
 695                         mp->MaterialColor[0] = MaterialRed;
 696                         mp->MaterialColor[1] = MaterialGreen;
 697                         mp->MaterialColor[2] = MaterialCyan;
 698                         mp->MaterialColor[3] = MaterialMagenta;
 699                         mp->MaterialColor[4] = MaterialYellow;
 700                         mp->MaterialColor[5] = MaterialBlue;
 701                         mp->edgedivisions = cubedivisions;
 702                         mp->Magnitude = 2.0;
 703                         break;
 704                 case 3:
 705                         mp->draw_object = draw_octa;
 706                         mp->MaterialColor[0] = MaterialRed;
 707                         mp->MaterialColor[1] = MaterialGreen;
 708                         mp->MaterialColor[2] = MaterialBlue;
 709                         mp->MaterialColor[3] = MaterialWhite;
 710                         mp->MaterialColor[4] = MaterialCyan;
 711                         mp->MaterialColor[5] = MaterialMagenta;
 712                         mp->MaterialColor[6] = MaterialGray;
 713                         mp->MaterialColor[7] = MaterialYellow;
 714                         mp->edgedivisions = octadivisions;
 715                         mp->Magnitude = 2.5;
 716                         break;
 717                 case 4:
 718                         mp->draw_object = draw_dodeca;
 719                         mp->MaterialColor[0] = MaterialRed;
 720                         mp->MaterialColor[1] = MaterialGreen;
 721                         mp->MaterialColor[2] = MaterialCyan;
 722                         mp->MaterialColor[3] = MaterialBlue;
 723                         mp->MaterialColor[4] = MaterialMagenta;
 724                         mp->MaterialColor[5] = MaterialYellow;
 725                         mp->MaterialColor[6] = MaterialGreen;
 726                         mp->MaterialColor[7] = MaterialCyan;
 727                         mp->MaterialColor[8] = MaterialRed;
 728                         mp->MaterialColor[9] = MaterialMagenta;
 729                         mp->MaterialColor[10] = MaterialBlue;
 730                         mp->MaterialColor[11] = MaterialYellow;
 731                         mp->edgedivisions = dodecadivisions;
 732                         mp->Magnitude = 2.0;
 733                         break;
 734                 case 5:
 735                         mp->draw_object = draw_icosa;
 736                         mp->MaterialColor[0] = MaterialRed;
 737                         mp->MaterialColor[1] = MaterialGreen;
 738                         mp->MaterialColor[2] = MaterialBlue;
 739                         mp->MaterialColor[3] = MaterialCyan;
 740                         mp->MaterialColor[4] = MaterialYellow;
 741                         mp->MaterialColor[5] = MaterialMagenta;
 742                         mp->MaterialColor[6] = MaterialRed;
 743                         mp->MaterialColor[7] = MaterialGreen;
 744                         mp->MaterialColor[8] = MaterialBlue;
 745                         mp->MaterialColor[9] = MaterialWhite;
 746                         mp->MaterialColor[10] = MaterialCyan;
 747                         mp->MaterialColor[11] = MaterialYellow;
 748                         mp->MaterialColor[12] = MaterialMagenta;
 749                         mp->MaterialColor[13] = MaterialRed;
 750                         mp->MaterialColor[14] = MaterialGreen;
 751                         mp->MaterialColor[15] = MaterialBlue;
 752                         mp->MaterialColor[16] = MaterialCyan;
 753                         mp->MaterialColor[17] = MaterialYellow;
 754                         mp->MaterialColor[18] = MaterialMagenta;
 755                         mp->MaterialColor[19] = MaterialGray;
 756                         mp->edgedivisions = icodivisions;
 757                         mp->Magnitude = 2.5;
 758                         break;
 759                 default:
 760                         mp->draw_object = draw_tetra;
 761                         mp->MaterialColor[0] = MaterialRed;
 762                         mp->MaterialColor[1] = MaterialGreen;
 763                         mp->MaterialColor[2] = MaterialBlue;
 764                         mp->MaterialColor[3] = MaterialWhite;
 765                         mp->edgedivisions = tetradivisions;
 766                         mp->Magnitude = 2.5;
 767                         break;
 768         }
 769         if (MI_IS_MONO(mi)) {
 770                 int         loop;
 771
 772                 for (loop = 0; loop < 20; loop++)
 773                         mp->MaterialColor[loop] = MaterialGray;
 774         }
 775 }
 776
 777 void
 778 init_morph3d(ModeInfo * mi)
 779 {
 780         int         screen = MI_SCREEN(mi);
 781         morph3dstruct *mp;
 782
 783         if (morph3d == NULL) {
 784                 if ((morph3d = (morph3dstruct *) calloc(MI_NUM_SCREENS(mi),
 785                                             sizeof (morph3dstruct))) == NULL)
 786                         return;
 787         }
 788         mp = &morph3d[screen];
 789         mp->step = NRAND(90);
 790         mp->VisibleSpikes = 1;
 791
 792         if ((mp->glx_context = init_GL(mi)) != NULL) {
 793
 794                 reshape(mi, MI_WIDTH(mi), MI_HEIGHT(mi));
 795                 mp->object = MI_COUNT(mi);
 796                 if (mp->object <= 0 || mp->object > 5)
 797                         mp->object = NRAND(5) + 1;
 798                 pinit(mi);
 799         } else {
 800                 MI_CLEARWINDOW(mi);
 801         }
 802 }
 803
 804 void
 805 draw_morph3d(ModeInfo * mi)
 806 {
 807         morph3dstruct *mp = &morph3d[MI_SCREEN(mi)];
 808
 809         Display    *display = MI_DISPLAY(mi);
 810         Window      window = MI_WINDOW(mi);
 811
 812         if (!mp->glx_context)
 813                 return;
 814
 815         glDrawBuffer(GL_BACK);
 816         glXMakeCurrent(display, window, *(mp->glx_context));
 817
 818         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 819
 820         glPushMatrix();
 821
 822         glTranslatef(0.0, 0.0, -10.0);
 823
 824         if (!MI_IS_ICONIC(mi)) {
 825                 glScalef(Scale4Window * mp->WindH / mp->WindW, Scale4Window, Scale4Window);
 826                 glTranslatef(2.5 * mp->WindW / mp->WindH * sin(mp->step * 1.11), 2.5 * cos(mp->step * 1.25 * 1.11), 0);
 827         } else {
 828                 glScalef(Scale4Iconic * mp->WindH / mp->WindW, Scale4Iconic, Scale4Iconic);
 829         }
 830
 831         glRotatef(mp->step * 100, 1, 0, 0);
 832         glRotatef(mp->step * 95, 0, 1, 0);
 833         glRotatef(mp->step * 90, 0, 0, 1);
 834
 835         mp->seno = (sin(mp->step) + 1.0 / 3.0) * (4.0 / 5.0) * mp->Magnitude;
 836
 837         if (mp->VisibleSpikes) {
 838 #ifdef DEBUG_CULL_FACE
 839                 int         loop;
 840
 841                 for (loop = 0; loop < 20; loop++)
 842                         mp->MaterialColor[loop] = MaterialGray;
 843 #endif
 844                 glDisable(GL_CULL_FACE);
 845         } else {
 846 #ifdef DEBUG_CULL_FACE
 847                 int         loop;
 848
 849                 for (loop = 0; loop < 20; loop++)
 850                         mp->MaterialColor[loop] = MaterialWhite;
 851 #endif
 852                 glEnable(GL_CULL_FACE);
 853         }
 854
 855         mp->draw_object(mi);
 856
 857         glPopMatrix();
 858
 859         glFlush();
 860
 861         glXSwapBuffers(display, window);
 862
 863         mp->step += 0.05;
 864 }
 865
 866 void
 867 change_morph3d(ModeInfo * mi)
 868 {
 869         morph3dstruct *mp = &morph3d[MI_SCREEN(mi)];
 870
 871         if (!mp->glx_context)
 872                 return;
 873
 874         mp->object = (mp->object) % 5 + 1;
 875         pinit(mi);
 876 }
 877
 878 void
 879 release_morph3d(ModeInfo * mi)
 880 {
 881         if (morph3d != NULL) {
 882                 (void) free((void *) morph3d);
 883                 morph3d = NULL;
 884         }
 885         FreeAllGL(mi);
 886 }
 887
 888 #endif