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 0
   5 static const char sccsid[] = "@(#)morph3d.c     5.01 2001/03/01 xlockmore";
   6 #endif
   7
   8 #undef DEBUG_CULL_FACE
   9
  10 /*-
  11  * Permission to use, copy, modify, and distribute this software and its
  12  * documentation for any purpose and without fee is hereby granted,
  13  * provided that the above copyright notice appear in all copies and that
  14  * both that copyright notice and this permission notice appear in
  15  * supporting documentation.
  16  *
  17  * This file is provided AS IS with no warranties of any kind.  The author
  18  * shall have no liability with respect to the infringement of copyrights,
  19  * trade secrets or any patents by this file or any part thereof.  In no
  20  * event will the author be liable for any lost revenue or profits or
  21  * other special, indirect and consequential damages.
  22  *
  23  * The original code for this mode was written by Marcelo Fernandes Vianna
  24  * (me...) and was inspired on a WindowsNT(R)'s screen saver (Flower Box).
  25  * It was written from scratch and it was not based on any other source code.
  26  *
  27  * Porting it to xlock (the final objective of this code since the moment I
  28  * decided to create it) was possible by comparing the original Mesa's gear
  29  * demo with it's ported version to xlock, so thanks for Danny Sung (look at
  30  * gear.c) for his indirect help.
  31  *
  32  * Thanks goes also to Brian Paul for making it possible and inexpensive
  33  * to use OpenGL at home.
  34  *
  35  * If you are interested in the original version of this program (not a xlock
  36  * mode, please refer to the Mesa package (ftp iris.ssec.wisc.edu on /pub/Mesa)
  37  *
  38  * Since I'm not a native English speaker, my apologies for any grammatical
  39  * mistakes.
  40  *
  41  * My e-mail address is
  42  * mfvianna@centroin.com.br
  43  *
  44  * Marcelo F. Vianna (Feb-13-1997)
  45  *
  46  * Revision History:
  47  * 05-Apr-2002: Removed all gllist uses (fix some bug with nvidia driver)
  48  * 01-Mar-2001: Added FPS stuff E.Lassauge <lassauge@mail.dotcom.fr>
  49  * 27-Jul-1997: Speed ups by Marcelo F. Vianna.
  50  * 08-May-1997: Speed ups by Marcelo F. Vianna.
  51  *
  52  */
  53
  54 #ifdef STANDALONE
  55 # define MODE_moebius
  56 # define DEFAULTS               "*delay:                40000   \n"             \
  57                                                 "*showFPS:      False   \n"             \
  58                                                 "*count:                0               \n"
  59 # define refresh_morph3d 0
  60 # define morph3d_handle_event 0
  61 # include "xlockmore.h"         /* from the xscreensaver distribution */
  62 #else /* !STANDALONE */
  63 # include "xlock.h"             /* from the xlockmore distribution */
  64 #endif /* !STANDALONE */
  65
  66 #ifdef MODE_moebius
  67
  68 ENTRYPOINT ModeSpecOpt morph3d_opts =
  69 {0, (XrmOptionDescRec *) NULL, 0, (argtype *) NULL, (OptionStruct *) NULL};
  70
  71 #ifdef USE_MODULES
  72 ModStruct   morph3d_description =
  73 {"morph3d", "init_morph3d", "draw_morph3d", "release_morph3d",
  74  "draw_morph3d", "change_morph3d", (char *) NULL, &morph3d_opts,
  75  1000, 0, 1, 1, 4, 1.0, "",
  76  "Shows GL morphing polyhedra", 0, NULL};
  77
  78 #endif
  79
  80 #define Scale4Window               0.3
  81 #define Scale4Iconic               1.0
  82
  83 #define VectMul(X1,Y1,Z1,X2,Y2,Z2) (Y1)*(Z2)-(Z1)*(Y2),(Z1)*(X2)-(X1)*(Z2),(X1)*(Y2)-(Y1)*(X2)
  84 #define sqr(A)                     ((A)*(A))
  85
  86 /* Increasing this values produces better image quality, the price is speed. */
  87 #define tetradivisions             23
  88 #define cubedivisions              20
  89 #define octadivisions              21
  90 #define dodecadivisions            10
  91 #define icodivisions               15
  92
  93 #define tetraangle                 109.47122063449069174
  94 #define cubeangle                  90.000000000000000000
  95 #define octaangle                  109.47122063449069174
  96 #define dodecaangle                63.434948822922009981
  97 #define icoangle                   41.810314895778596167
  98
  99 #ifndef Pi
 100 #define Pi                         M_PI
 101 #endif
 102 #define SQRT2                      1.4142135623730951455
 103 #define SQRT3                      1.7320508075688771932
 104 #define SQRT5                      2.2360679774997898051
 105 #define SQRT6                      2.4494897427831778813
 106 #define SQRT15                     3.8729833462074170214
 107 #define cossec36_2                 0.8506508083520399322
 108 #define cos72                      0.3090169943749474241
 109 #define sin72                      0.9510565162951535721
 110 #define cos36                      0.8090169943749474241
 111 #define sin36                      0.5877852522924731292
 112
 113 /*************************************************************************/
 114
 115 typedef struct {
 116         GLint       WindH, WindW;
 117         GLfloat     step;
 118         GLfloat     seno;
 119         int         object;
 120         int         edgedivisions;
 121         int         VisibleSpikes;
 122         void        (*draw_object) (ModeInfo * mi);
 123         float       Magnitude;
 124         const float *MaterialColor[20];
 125         GLXContext *glx_context;
 126     int         arrayninit;
 127
 128 } morph3dstruct;
 129
 130 static const GLfloat front_shininess[] = {60.0};
 131 static const GLfloat front_specular[]  = {0.7, 0.7, 0.7, 1.0};
 132 static const GLfloat ambient[]         = {0.0, 0.0, 0.0, 1.0};
 133 static const GLfloat diffuse[]         = {1.0, 1.0, 1.0, 1.0};
 134 static const GLfloat position0[]       = {1.0, 1.0, 1.0, 0.0};
 135 static const GLfloat position1[]       = {-1.0, -1.0, 1.0, 0.0};
 136 static const GLfloat lmodel_ambient[]  = {0.5, 0.5, 0.5, 1.0};
 137 static const GLfloat lmodel_twoside[]  = {GL_TRUE};
 138
 139 static const GLfloat MaterialRed[]     = {0.7, 0.0, 0.0, 1.0};
 140 static const GLfloat MaterialGreen[]   = {0.1, 0.5, 0.2, 1.0};
 141 static const GLfloat MaterialBlue[]    = {0.0, 0.0, 0.7, 1.0};
 142 static const GLfloat MaterialCyan[]    = {0.2, 0.5, 0.7, 1.0};
 143 static const GLfloat MaterialYellow[]  = {0.7, 0.7, 0.0, 1.0};
 144 static const GLfloat MaterialMagenta[] = {0.6, 0.2, 0.5, 1.0};
 145 static const GLfloat MaterialWhite[]   = {0.7, 0.7, 0.7, 1.0};
 146 static const GLfloat MaterialGray[]    = {0.5, 0.5, 0.5, 1.0};
 147
 148 static morph3dstruct *morph3d = (morph3dstruct *) NULL;
 149
 150 #define TRIANGLE(Edge, Amp, Divisions, Z, VS)                                                                    \
 151 {                                                                                                                \
 152   GLfloat   Xf,Yf,Xa,Yb=0.0,Xf2=0.0,Yf2=0.0,Yf_2=0.0,Yb2,Yb_2;                                                   \
 153   GLfloat   Factor=0.0,Factor1,Factor2;                                                                          \
 154   GLfloat   VertX,VertY,VertZ,NeiAX,NeiAY,NeiAZ,NeiBX,NeiBY,NeiBZ;                                               \
 155   GLfloat   Ax,Ay;                                                                                               \
 156   int       Ri,Ti;                                                                                               \
 157   GLfloat   Vr=(Edge)*SQRT3/3;                                                                                   \
 158   GLfloat   AmpVr2=(Amp)/sqr(Vr);                                                                                \
 159   GLfloat   Zf=(Edge)*(Z);                                                                                       \
 160                                                                                                                  \
 161   Ax=(Edge)*(+0.5/(Divisions)), Ay=(Edge)*(-SQRT3/(2*Divisions));                                                \
 162                                                                                                                  \
 163   Yf=Vr+Ay; Yb=Yf+0.001;                                                                                         \
 164   for (Ri=1; Ri<=(Divisions); Ri++) {                                                                            \
 165     glBegin(GL_TRIANGLE_STRIP);                                                                                  \
 166     Xf=(float)Ri*Ax; Xa=Xf+0.001;                                                                                \
 167     Yf2=sqr(Yf); Yf_2=sqr(Yf-Ay);                                                                                \
 168     Yb2=sqr(Yb); Yb_2=sqr(Yb-Ay);                                                                                \
 169     for (Ti=0; Ti<Ri; Ti++) {                                                                                    \
 170       Factor=1-(((Xf2=sqr(Xf))+Yf2)*AmpVr2);                                                                     \
 171       Factor1=1-((sqr(Xa)+Yf2)*AmpVr2);                                                                          \
 172       Factor2=1-((Xf2+Yb2)*AmpVr2);                                                                              \
 173       VertX=Factor*Xf;        VertY=Factor*Yf;        VertZ=Factor*Zf;                                           \
 174       NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Yf-VertY; NeiAZ=Factor1*Zf-VertZ;                                    \
 175       NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                    \
 176       glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                             \
 177       glVertex3f(VertX, VertY, VertZ);                                                                           \
 178       mi->polygon_count++;                                                                                       \
 179                                                                                                                  \
 180       Xf-=Ax; Yf-=Ay; Xa-=Ax; Yb-=Ay;                                                                            \
 181                                                                                                                  \
 182       Factor=1-(((Xf2=sqr(Xf))+Yf_2)*AmpVr2);                                                                    \
 183       Factor1=1-((sqr(Xa)+Yf_2)*AmpVr2);                                                                         \
 184       Factor2=1-((Xf2+Yb_2)*AmpVr2);                                                                             \
 185       VertX=Factor*Xf;        VertY=Factor*Yf;        VertZ=Factor*Zf;                                           \
 186       NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Yf-VertY; NeiAZ=Factor1*Zf-VertZ;                                    \
 187       NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                    \
 188       glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                             \
 189       glVertex3f(VertX, VertY, VertZ);                                                                           \
 190       mi->polygon_count++;                                                                                       \
 191                                                                                                                  \
 192       Xf-=Ax; Yf+=Ay; Xa-=Ax; Yb+=Ay;                                                                            \
 193     }                                                                                                            \
 194     Factor=1-(((Xf2=sqr(Xf))+(Yf2=sqr(Yf)))*AmpVr2);                                                             \
 195     Factor1=1-((sqr(Xa)+Yf2)*AmpVr2);                                                                            \
 196     Factor2=1-((Xf2+sqr(Yb))*AmpVr2);                                                                            \
 197     VertX=Factor*Xf;        VertY=Factor*Yf;        VertZ=Factor*Zf;                                             \
 198     NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Yf-VertY; NeiAZ=Factor1*Zf-VertZ;                                      \
 199     NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                      \
 200     glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                               \
 201     glVertex3f(VertX, VertY, VertZ);                                                                             \
 202     Yf+=Ay; Yb+=Ay;                                                                                              \
 203     glEnd();                                                                                                     \
 204   }                                                                                                              \
 205   VS=(Factor<0);                                                                                                 \
 206 }
 207
 208 #define SQUARE(Edge, Amp, Divisions, Z, VS)                                                                      \
 209 {                                                                                                                \
 210   int       Xi,Yi;                                                                                               \
 211   GLfloat   Xf,Yf,Y,Xf2,Yf2,Y2,Xa,Xa2,Yb;                                                                        \
 212   GLfloat   Factor=0.0,Factor1,Factor2;                                                                          \
 213   GLfloat   VertX,VertY,VertZ,NeiAX,NeiAY,NeiAZ,NeiBX,NeiBY,NeiBZ;                                               \
 214   GLfloat   Zf=(Edge)*(Z);                                                                                       \
 215   GLfloat   AmpVr2=(Amp)/sqr((Edge)*SQRT2/2);                                                                    \
 216                                                                                                                  \
 217   for (Yi=0; Yi<(Divisions); Yi++) {                                                                             \
 218     Yf=-((Edge)/2.0) + ((float)Yi)/(Divisions)*(Edge);                                                           \
 219     Yf2=sqr(Yf);                                                                                                 \
 220     Y=Yf+1.0/(Divisions)*(Edge);                                                                                 \
 221     Y2=sqr(Y);                                                                                                   \
 222     glBegin(GL_QUAD_STRIP);                                                                                      \
 223     for (Xi=0; Xi<=(Divisions); Xi++) {                                                                          \
 224       Xf=-((Edge)/2.0) + ((float)Xi)/(Divisions)*(Edge);                                                         \
 225       Xf2=sqr(Xf);                                                                                               \
 226                                                                                                                  \
 227       Xa=Xf+0.001; Yb=Y+0.001;                                                                                   \
 228       Factor=1-((Xf2+Y2)*AmpVr2);                                                                                \
 229       Factor1=1-(((Xa2=sqr(Xa))+Y2)*AmpVr2);                                                                     \
 230       Factor2=1-((Xf2+sqr(Yb))*AmpVr2);                                                                          \
 231       VertX=Factor*Xf;        VertY=Factor*Y;         VertZ=Factor*Zf;                                           \
 232       NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Y-VertY;  NeiAZ=Factor1*Zf-VertZ;                                    \
 233       NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                    \
 234       glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                             \
 235       glVertex3f(VertX, VertY, VertZ);                                                                           \
 236                                                                                                                  \
 237       Yb=Yf+0.001;                                                                                               \
 238       Factor=1-((Xf2+Yf2)*AmpVr2);                                                                               \
 239       Factor1=1-((Xa2+Yf2)*AmpVr2);                                                                              \
 240       Factor2=1-((Xf2+sqr(Yb))*AmpVr2);                                                                          \
 241       VertX=Factor*Xf;        VertY=Factor*Yf;        VertZ=Factor*Zf;                                           \
 242       NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Yf-VertY; NeiAZ=Factor1*Zf-VertZ;                                    \
 243       NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                    \
 244       glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                             \
 245       glVertex3f(VertX, VertY, VertZ);                                                                           \
 246       mi->polygon_count++;                                                                                       \
 247     }                                                                                                            \
 248     glEnd();                                                                                                     \
 249   }                                                                                                              \
 250   VS=(Factor<0);                                                                                                 \
 251 }
 252
 253 #define PENTAGON(Edge, Amp, Divisions, Z, VS)                                                                    \
 254 {                                                                                                                \
 255   int       Ri,Ti,Fi;                                                                                            \
 256   GLfloat   Xf,Yf,Xa,Yb,Xf2,Yf2;                                                                                 \
 257   GLfloat   Factor=0.0,Factor1,Factor2;                                                                          \
 258   GLfloat   VertX,VertY,VertZ,NeiAX,NeiAY,NeiAZ,NeiBX,NeiBY,NeiBZ;                                               \
 259   GLfloat   Zf=(Edge)*(Z);                                                                                       \
 260   GLfloat   AmpVr2=(Amp)/sqr((Edge)*cossec36_2);                                                                 \
 261                                                                                                                  \
 262   GLfloat x[6],y[6];                                                                                             \
 263                                                                                                                  \
 264   for(Fi=0;Fi<6;Fi++) {                                                                                          \
 265     x[Fi]=-cos( Fi*2*Pi/5 + Pi/10 )/(Divisions)*cossec36_2*(Edge);                                               \
 266     y[Fi]=sin( Fi*2*Pi/5 + Pi/10 )/(Divisions)*cossec36_2*(Edge);                                                \
 267   }                                                                                                              \
 268                                                                                                                  \
 269   for (Ri=1; Ri<=(Divisions); Ri++) {                                                                            \
 270     for (Fi=0; Fi<5; Fi++) {                                                                                     \
 271       glBegin(GL_TRIANGLE_STRIP);                                                                                \
 272       for (Ti=0; Ti<Ri; Ti++) {                                                                                  \
 273         Xf=(float)(Ri-Ti)*x[Fi] + (float)Ti*x[Fi+1];                                                             \
 274         Yf=(float)(Ri-Ti)*y[Fi] + (float)Ti*y[Fi+1];                                                             \
 275         Xa=Xf+0.001; Yb=Yf+0.001;                                                                                \
 276         Factor=1-(((Xf2=sqr(Xf))+(Yf2=sqr(Yf)))*AmpVr2);                                                             \
 277         Factor1=1-((sqr(Xa)+Yf2)*AmpVr2);                                                                            \
 278         Factor2=1-((Xf2+sqr(Yb))*AmpVr2);                                                                            \
 279         VertX=Factor*Xf;        VertY=Factor*Yf;        VertZ=Factor*Zf;                                         \
 280         NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Yf-VertY; NeiAZ=Factor1*Zf-VertZ;                                  \
 281         NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                  \
 282         glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                           \
 283                 glVertex3f(VertX, VertY, VertZ);                                                                         \
 284             mi->polygon_count++;                                                                                     \
 285                                                                                                                  \
 286         Xf-=x[Fi]; Yf-=y[Fi]; Xa-=x[Fi]; Yb-=y[Fi];                                                              \
 287                                                                                                                  \
 288                 Factor=1-(((Xf2=sqr(Xf))+(Yf2=sqr(Yf)))*AmpVr2);                                                         \
 289                 Factor1=1-((sqr(Xa)+Yf2)*AmpVr2);                                                                        \
 290                 Factor2=1-((Xf2+sqr(Yb))*AmpVr2);                                                                        \
 291         VertX=Factor*Xf;        VertY=Factor*Yf;        VertZ=Factor*Zf;                                         \
 292         NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Yf-VertY; NeiAZ=Factor1*Zf-VertZ;                                  \
 293         NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                  \
 294         glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                           \
 295                 glVertex3f(VertX, VertY, VertZ);                                                                         \
 296             mi->polygon_count++;                                                                                     \
 297                                                                                                                  \
 298       }                                                                                                          \
 299       Xf=(float)Ri*x[Fi+1];                                                                                      \
 300       Yf=(float)Ri*y[Fi+1];                                                                                      \
 301       Xa=Xf+0.001; Yb=Yf+0.001;                                                                                  \
 302       Factor=1-(((Xf2=sqr(Xf))+(Yf2=sqr(Yf)))*AmpVr2);                                                           \
 303       Factor1=1-((sqr(Xa)+Yf2)*AmpVr2);                                                                          \
 304       Factor2=1-((Xf2+sqr(Yb))*AmpVr2);                                                                          \
 305       VertX=Factor*Xf;        VertY=Factor*Yf;        VertZ=Factor*Zf;                                           \
 306       NeiAX=Factor1*Xa-VertX; NeiAY=Factor1*Yf-VertY; NeiAZ=Factor1*Zf-VertZ;                                    \
 307       NeiBX=Factor2*Xf-VertX; NeiBY=Factor2*Yb-VertY; NeiBZ=Factor2*Zf-VertZ;                                    \
 308       glNormal3f(VectMul(NeiAX, NeiAY, NeiAZ, NeiBX, NeiBY, NeiBZ));                                             \
 309       glVertex3f(VertX, VertY, VertZ);                                                                           \
 310       glEnd();                                                                                                   \
 311     }                                                                                                            \
 312   }                                                                                                              \
 313   VS=(Factor<0);                                                                                                     \
 314 }
 315
 316 static void
 317 draw_tetra(ModeInfo * mi)
 318 {
 319         morph3dstruct *mp = &morph3d[MI_SCREEN(mi)];
 320
 321         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[0]);
 322
 323         TRIANGLE(2, mp->seno, mp->edgedivisions, 0.5 / SQRT6, mp->VisibleSpikes);
 324
 325         glPushMatrix();
 326         glRotatef(180, 0, 0, 1);
 327         glRotatef(-tetraangle, 1, 0, 0);
 328         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[1]);
 329         TRIANGLE(2, mp->seno, mp->edgedivisions, 0.5 / SQRT6, mp->VisibleSpikes);
 330         glPopMatrix();
 331         glPushMatrix();
 332         glRotatef(180, 0, 1, 0);
 333         glRotatef(-180 + tetraangle, 0.5, SQRT3 / 2, 0);
 334         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[2]);
 335         TRIANGLE(2, mp->seno, mp->edgedivisions, 0.5 / SQRT6, mp->VisibleSpikes);
 336         glPopMatrix();
 337         glRotatef(180, 0, 1, 0);
 338         glRotatef(-180 + tetraangle, 0.5, -SQRT3 / 2, 0);
 339         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[3]);
 340         TRIANGLE(2, mp->seno, mp->edgedivisions, 0.5 / SQRT6, mp->VisibleSpikes);
 341 }
 342
 343 static void
 344 draw_cube(ModeInfo * mi)
 345 {
 346         morph3dstruct *mp = &morph3d[MI_SCREEN(mi)];
 347
 348         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[0]);
 349
 350         SQUARE(2, mp->seno, mp->edgedivisions, 0.5, mp->VisibleSpikes)
 351
 352         glRotatef(cubeangle, 1, 0, 0);
 353         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[1]);
 354         SQUARE(2, mp->seno, mp->edgedivisions, 0.5, mp->VisibleSpikes)
 355         glRotatef(cubeangle, 1, 0, 0);
 356         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[2]);
 357         SQUARE(2, mp->seno, mp->edgedivisions, 0.5, mp->VisibleSpikes)
 358         glRotatef(cubeangle, 1, 0, 0);
 359         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[3]);
 360         SQUARE(2, mp->seno, mp->edgedivisions, 0.5, mp->VisibleSpikes)
 361         glRotatef(cubeangle, 0, 1, 0);
 362         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[4]);
 363         SQUARE(2, mp->seno, mp->edgedivisions, 0.5, mp->VisibleSpikes)
 364         glRotatef(2 * cubeangle, 0, 1, 0);
 365         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[5]);
 366         SQUARE(2, mp->seno, mp->edgedivisions, 0.5, mp->VisibleSpikes)
 367 }
 368
 369 static void
 370 draw_octa(ModeInfo * mi)
 371 {
 372         morph3dstruct *mp = &morph3d[MI_SCREEN(mi)];
 373
 374         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[0]);
 375         TRIANGLE(2, mp->seno, mp->edgedivisions, 1 / SQRT6, mp->VisibleSpikes);
 376
 377         glPushMatrix();
 378         glRotatef(180, 0, 0, 1);
 379         glRotatef(-180 + octaangle, 1, 0, 0);
 380         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[1]);
 381         TRIANGLE(2, mp->seno, mp->edgedivisions, 1 / SQRT6, mp->VisibleSpikes);
 382         glPopMatrix();
 383         glPushMatrix();
 384         glRotatef(180, 0, 1, 0);
 385         glRotatef(-octaangle, 0.5, SQRT3 / 2, 0);
 386         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[2]);
 387         TRIANGLE(2, mp->seno, mp->edgedivisions, 1 / SQRT6, mp->VisibleSpikes);
 388         glPopMatrix();
 389         glPushMatrix();
 390         glRotatef(180, 0, 1, 0);
 391         glRotatef(-octaangle, 0.5, -SQRT3 / 2, 0);
 392         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[3]);
 393         TRIANGLE(2, mp->seno, mp->edgedivisions, 1 / SQRT6, mp->VisibleSpikes);
 394         glPopMatrix();
 395         glRotatef(180, 1, 0, 0);
 396         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[4]);
 397         TRIANGLE(2, mp->seno, mp->edgedivisions, 1 / SQRT6, mp->VisibleSpikes);
 398         glPushMatrix();
 399         glRotatef(180, 0, 0, 1);
 400         glRotatef(-180 + octaangle, 1, 0, 0);
 401         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[5]);
 402         TRIANGLE(2, mp->seno, mp->edgedivisions, 1 / SQRT6, mp->VisibleSpikes);
 403         glPopMatrix();
 404         glPushMatrix();
 405         glRotatef(180, 0, 1, 0);
 406         glRotatef(-octaangle, 0.5, SQRT3 / 2, 0);
 407         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[6]);
 408         TRIANGLE(2, mp->seno, mp->edgedivisions, 1 / SQRT6, mp->VisibleSpikes);
 409         glPopMatrix();
 410         glRotatef(180, 0, 1, 0);
 411         glRotatef(-octaangle, 0.5, -SQRT3 / 2, 0);
 412         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[7]);
 413         TRIANGLE(2, mp->seno, mp->edgedivisions, 1 / SQRT6, mp->VisibleSpikes);
 414 }
 415
 416 static void
 417 draw_dodeca(ModeInfo * mi)
 418 {
 419         morph3dstruct *mp = &morph3d[MI_SCREEN(mi)];
 420
 421 #define TAU ((SQRT5+1)/2)
 422
 423         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[0]);
 424
 425         PENTAGON(1, mp->seno, mp->edgedivisions, sqr(TAU) * sqrt((TAU + 2) / 5) / 2, mp->VisibleSpikes);
 426
 427         glPushMatrix();
 428         glRotatef(180, 0, 0, 1);
 429         glPushMatrix();
 430         glRotatef(-dodecaangle, 1, 0, 0);
 431         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[1]);
 432         PENTAGON(1, mp->seno, mp->edgedivisions, sqr(TAU) * sqrt((TAU + 2) / 5) / 2, mp->VisibleSpikes);
 433         glPopMatrix();
 434         glPushMatrix();
 435         glRotatef(-dodecaangle, cos72, sin72, 0);
 436         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[2]);
 437         PENTAGON(1, mp->seno, mp->edgedivisions, sqr(TAU) * sqrt((TAU + 2) / 5) / 2, mp->VisibleSpikes);
 438         glPopMatrix();
 439         glPushMatrix();
 440         glRotatef(-dodecaangle, cos72, -sin72, 0);
 441         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[3]);
 442         PENTAGON(1, mp->seno, mp->edgedivisions, sqr(TAU) * sqrt((TAU + 2) / 5) / 2, mp->VisibleSpikes);
 443         glPopMatrix();
 444         glPushMatrix();
 445         glRotatef(dodecaangle, cos36, -sin36, 0);
 446         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[4]);
 447         PENTAGON(1, mp->seno, mp->edgedivisions, sqr(TAU) * sqrt((TAU + 2) / 5) / 2, mp->VisibleSpikes);
 448         glPopMatrix();
 449         glRotatef(dodecaangle, cos36, sin36, 0);
 450         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[5]);
 451         PENTAGON(1, mp->seno, mp->edgedivisions, sqr(TAU) * sqrt((TAU + 2) / 5) / 2, mp->VisibleSpikes);
 452         glPopMatrix();
 453         glRotatef(180, 1, 0, 0);
 454         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[6]);
 455         PENTAGON(1, mp->seno, mp->edgedivisions, sqr(TAU) * sqrt((TAU + 2) / 5) / 2, mp->VisibleSpikes);
 456         glRotatef(180, 0, 0, 1);
 457         glPushMatrix();
 458         glRotatef(-dodecaangle, 1, 0, 0);
 459         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[7]);
 460         PENTAGON(1, mp->seno, mp->edgedivisions, sqr(TAU) * sqrt((TAU + 2) / 5) / 2, mp->VisibleSpikes);
 461         glPopMatrix();
 462         glPushMatrix();
 463         glRotatef(-dodecaangle, cos72, sin72, 0);
 464         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[8]);
 465         PENTAGON(1, mp->seno, mp->edgedivisions, sqr(TAU) * sqrt((TAU + 2) / 5) / 2, mp->VisibleSpikes);
 466         glPopMatrix();
 467         glPushMatrix();
 468         glRotatef(-dodecaangle, cos72, -sin72, 0);
 469         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[9]);
 470         PENTAGON(1, mp->seno, mp->edgedivisions, sqr(TAU) * sqrt((TAU + 2) / 5) / 2, mp->VisibleSpikes);
 471         glPopMatrix();
 472         glPushMatrix();
 473         glRotatef(dodecaangle, cos36, -sin36, 0);
 474         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[10]);
 475         PENTAGON(1, mp->seno, mp->edgedivisions, sqr(TAU) * sqrt((TAU + 2) / 5) / 2, mp->VisibleSpikes);
 476         glPopMatrix();
 477         glRotatef(dodecaangle, cos36, sin36, 0);
 478         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[11]);
 479         PENTAGON(1, mp->seno, mp->edgedivisions, sqr(TAU) * sqrt((TAU + 2) / 5) / 2, mp->VisibleSpikes);
 480 }
 481
 482 static void
 483 draw_icosa(ModeInfo * mi)
 484 {
 485         morph3dstruct *mp = &morph3d[MI_SCREEN(mi)];
 486
 487         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[0]);
 488
 489         TRIANGLE(1.5, mp->seno, mp->edgedivisions, (3 * SQRT3 + SQRT15) / 12, mp->VisibleSpikes);
 490
 491         glPushMatrix();
 492
 493         glPushMatrix();
 494         glRotatef(180, 0, 0, 1);
 495         glRotatef(-icoangle, 1, 0, 0);
 496         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[1]);
 497         TRIANGLE(1.5, mp->seno, mp->edgedivisions, (3 * SQRT3 + SQRT15) / 12, mp->VisibleSpikes);
 498         glPushMatrix();
 499         glRotatef(180, 0, 1, 0);
 500         glRotatef(-180 + icoangle, 0.5, SQRT3 / 2, 0);
 501         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[2]);
 502         TRIANGLE(1.5, mp->seno, mp->edgedivisions, (3 * SQRT3 + SQRT15) / 12, mp->VisibleSpikes);
 503         glPopMatrix();
 504         glRotatef(180, 0, 1, 0);
 505         glRotatef(-180 + icoangle, 0.5, -SQRT3 / 2, 0);
 506         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[3]);
 507         TRIANGLE(1.5, mp->seno, mp->edgedivisions, (3 * SQRT3 + SQRT15) / 12, mp->VisibleSpikes);
 508         glPopMatrix();
 509         glPushMatrix();
 510         glRotatef(180, 0, 1, 0);
 511         glRotatef(-180 + icoangle, 0.5, SQRT3 / 2, 0);
 512         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[4]);
 513         TRIANGLE(1.5, mp->seno, mp->edgedivisions, (3 * SQRT3 + SQRT15) / 12, mp->VisibleSpikes);
 514         glPushMatrix();
 515         glRotatef(180, 0, 1, 0);
 516         glRotatef(-180 + icoangle, 0.5, SQRT3 / 2, 0);
 517         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[5]);
 518         TRIANGLE(1.5, mp->seno, mp->edgedivisions, (3 * SQRT3 + SQRT15) / 12, mp->VisibleSpikes);
 519         glPopMatrix();
 520         glRotatef(180, 0, 0, 1);
 521         glRotatef(-icoangle, 1, 0, 0);
 522         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[6]);
 523         TRIANGLE(1.5, mp->seno, mp->edgedivisions, (3 * SQRT3 + SQRT15) / 12, mp->VisibleSpikes);
 524         glPopMatrix();
 525         glRotatef(180, 0, 1, 0);
 526         glRotatef(-180 + icoangle, 0.5, -SQRT3 / 2, 0);
 527         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[7]);
 528         TRIANGLE(1.5, mp->seno, mp->edgedivisions, (3 * SQRT3 + SQRT15) / 12, mp->VisibleSpikes);
 529         glPushMatrix();
 530         glRotatef(180, 0, 1, 0);
 531         glRotatef(-180 + icoangle, 0.5, -SQRT3 / 2, 0);
 532         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[8]);
 533         TRIANGLE(1.5, mp->seno, mp->edgedivisions, (3 * SQRT3 + SQRT15) / 12, mp->VisibleSpikes);
 534         glPopMatrix();
 535         glRotatef(180, 0, 0, 1);
 536         glRotatef(-icoangle, 1, 0, 0);
 537         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[9]);
 538         TRIANGLE(1.5, mp->seno, mp->edgedivisions, (3 * SQRT3 + SQRT15) / 12, mp->VisibleSpikes);
 539         glPopMatrix();
 540         glRotatef(180, 1, 0, 0);
 541         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[10]);
 542         TRIANGLE(1.5, mp->seno, mp->edgedivisions, (3 * SQRT3 + SQRT15) / 12, mp->VisibleSpikes);
 543         glPushMatrix();
 544         glRotatef(180, 0, 0, 1);
 545         glRotatef(-icoangle, 1, 0, 0);
 546         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[11]);
 547         TRIANGLE(1.5, mp->seno, mp->edgedivisions, (3 * SQRT3 + SQRT15) / 12, mp->VisibleSpikes);
 548         glPushMatrix();
 549         glRotatef(180, 0, 1, 0);
 550         glRotatef(-180 + icoangle, 0.5, SQRT3 / 2, 0);
 551         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[12]);
 552         TRIANGLE(1.5, mp->seno, mp->edgedivisions, (3 * SQRT3 + SQRT15) / 12, mp->VisibleSpikes);
 553         glPopMatrix();
 554         glRotatef(180, 0, 1, 0);
 555         glRotatef(-180 + icoangle, 0.5, -SQRT3 / 2, 0);
 556         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[13]);
 557         TRIANGLE(1.5, mp->seno, mp->edgedivisions, (3 * SQRT3 + SQRT15) / 12, mp->VisibleSpikes);
 558         glPopMatrix();
 559         glPushMatrix();
 560         glRotatef(180, 0, 1, 0);
 561         glRotatef(-180 + icoangle, 0.5, SQRT3 / 2, 0);
 562         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[14]);
 563         TRIANGLE(1.5, mp->seno, mp->edgedivisions, (3 * SQRT3 + SQRT15) / 12, mp->VisibleSpikes);
 564         glPushMatrix();
 565         glRotatef(180, 0, 1, 0);
 566         glRotatef(-180 + icoangle, 0.5, SQRT3 / 2, 0);
 567         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[15]);
 568         TRIANGLE(1.5, mp->seno, mp->edgedivisions, (3 * SQRT3 + SQRT15) / 12, mp->VisibleSpikes);
 569         glPopMatrix();
 570         glRotatef(180, 0, 0, 1);
 571         glRotatef(-icoangle, 1, 0, 0);
 572         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[16]);
 573         TRIANGLE(1.5, mp->seno, mp->edgedivisions, (3 * SQRT3 + SQRT15) / 12, mp->VisibleSpikes);
 574         glPopMatrix();
 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[17]);
 578         TRIANGLE(1.5, mp->seno, mp->edgedivisions, (3 * SQRT3 + SQRT15) / 12, mp->VisibleSpikes);
 579         glPushMatrix();
 580         glRotatef(180, 0, 1, 0);
 581         glRotatef(-180 + icoangle, 0.5, -SQRT3 / 2, 0);
 582         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[18]);
 583         TRIANGLE(1.5, mp->seno, mp->edgedivisions, (3 * SQRT3 + SQRT15) / 12, mp->VisibleSpikes);
 584         glPopMatrix();
 585         glRotatef(180, 0, 0, 1);
 586         glRotatef(-icoangle, 1, 0, 0);
 587         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mp->MaterialColor[19]);
 588         TRIANGLE(1.5, mp->seno, mp->edgedivisions, (3 * SQRT3 + SQRT15) / 12, mp->VisibleSpikes);
 589 }
 590
 591 ENTRYPOINT void
 592 reshape_morph3d(ModeInfo * mi, int width, int height)
 593 {
 594         morph3dstruct *mp = &morph3d[MI_SCREEN(mi)];
 595
 596         glViewport(0, 0, mp->WindW = (GLint) width, mp->WindH = (GLint) height);
 597         glMatrixMode(GL_PROJECTION);
 598         glLoadIdentity();
 599         glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 15.0);
 600         glMatrixMode(GL_MODELVIEW);
 601 }
 602
 603 static void
 604 pinit(ModeInfo * mi)
 605 {
 606         morph3dstruct *mp = &morph3d[MI_SCREEN(mi)];
 607
 608         glClearDepth(1.0);
 609         glColor3f(1.0, 1.0, 1.0);
 610
 611         glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
 612         glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
 613         glLightfv(GL_LIGHT0, GL_POSITION, position0);
 614         glLightfv(GL_LIGHT1, GL_AMBIENT, ambient);
 615         glLightfv(GL_LIGHT1, GL_DIFFUSE, diffuse);
 616         glLightfv(GL_LIGHT1, GL_POSITION, position1);
 617         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
 618         glLightModelfv(GL_LIGHT_MODEL_TWO_SIDE, lmodel_twoside);
 619         glEnable(GL_LIGHTING);
 620         glEnable(GL_LIGHT0);
 621         glEnable(GL_LIGHT1);
 622         glEnable(GL_DEPTH_TEST);
 623         glEnable(GL_NORMALIZE);
 624
 625         glShadeModel(GL_SMOOTH);
 626         glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, front_shininess);
 627         glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, front_specular);
 628
 629         switch (mp->object) {
 630                 case 2:
 631                         mp->draw_object = draw_cube;
 632                         mp->MaterialColor[0] = MaterialRed;
 633                         mp->MaterialColor[1] = MaterialGreen;
 634                         mp->MaterialColor[2] = MaterialCyan;
 635                         mp->MaterialColor[3] = MaterialMagenta;
 636                         mp->MaterialColor[4] = MaterialYellow;
 637                         mp->MaterialColor[5] = MaterialBlue;
 638                         mp->edgedivisions = cubedivisions;
 639                         mp->Magnitude = 2.0;
 640                         break;
 641                 case 3:
 642                         mp->draw_object = draw_octa;
 643                         mp->MaterialColor[0] = MaterialRed;
 644                         mp->MaterialColor[1] = MaterialGreen;
 645                         mp->MaterialColor[2] = MaterialBlue;
 646                         mp->MaterialColor[3] = MaterialWhite;
 647                         mp->MaterialColor[4] = MaterialCyan;
 648                         mp->MaterialColor[5] = MaterialMagenta;
 649                         mp->MaterialColor[6] = MaterialGray;
 650                         mp->MaterialColor[7] = MaterialYellow;
 651                         mp->edgedivisions = octadivisions;
 652                         mp->Magnitude = 2.5;
 653                         break;
 654                 case 4:
 655                         mp->draw_object = draw_dodeca;
 656                         mp->MaterialColor[0] = MaterialRed;
 657                         mp->MaterialColor[1] = MaterialGreen;
 658                         mp->MaterialColor[2] = MaterialCyan;
 659                         mp->MaterialColor[3] = MaterialBlue;
 660                         mp->MaterialColor[4] = MaterialMagenta;
 661                         mp->MaterialColor[5] = MaterialYellow;
 662                         mp->MaterialColor[6] = MaterialGreen;
 663                         mp->MaterialColor[7] = MaterialCyan;
 664                         mp->MaterialColor[8] = MaterialRed;
 665                         mp->MaterialColor[9] = MaterialMagenta;
 666                         mp->MaterialColor[10] = MaterialBlue;
 667                         mp->MaterialColor[11] = MaterialYellow;
 668                         mp->edgedivisions = dodecadivisions;
 669                         mp->Magnitude = 2.0;
 670                         break;
 671                 case 5:
 672                         mp->draw_object = draw_icosa;
 673                         mp->MaterialColor[0] = MaterialRed;
 674                         mp->MaterialColor[1] = MaterialGreen;
 675                         mp->MaterialColor[2] = MaterialBlue;
 676                         mp->MaterialColor[3] = MaterialCyan;
 677                         mp->MaterialColor[4] = MaterialYellow;
 678                         mp->MaterialColor[5] = MaterialMagenta;
 679                         mp->MaterialColor[6] = MaterialRed;
 680                         mp->MaterialColor[7] = MaterialGreen;
 681                         mp->MaterialColor[8] = MaterialBlue;
 682                         mp->MaterialColor[9] = MaterialWhite;
 683                         mp->MaterialColor[10] = MaterialCyan;
 684                         mp->MaterialColor[11] = MaterialYellow;
 685                         mp->MaterialColor[12] = MaterialMagenta;
 686                         mp->MaterialColor[13] = MaterialRed;
 687                         mp->MaterialColor[14] = MaterialGreen;
 688                         mp->MaterialColor[15] = MaterialBlue;
 689                         mp->MaterialColor[16] = MaterialCyan;
 690                         mp->MaterialColor[17] = MaterialYellow;
 691                         mp->MaterialColor[18] = MaterialMagenta;
 692                         mp->MaterialColor[19] = MaterialGray;
 693                         mp->edgedivisions = icodivisions;
 694                         mp->Magnitude = 2.5;
 695                         break;
 696                 default:
 697                         mp->draw_object = draw_tetra;
 698                         mp->MaterialColor[0] = MaterialRed;
 699                         mp->MaterialColor[1] = MaterialGreen;
 700                         mp->MaterialColor[2] = MaterialBlue;
 701                         mp->MaterialColor[3] = MaterialWhite;
 702                         mp->edgedivisions = tetradivisions;
 703                         mp->Magnitude = 2.5;
 704                         break;
 705         }
 706         if (MI_IS_MONO(mi)) {
 707                 int         loop;
 708
 709                 for (loop = 0; loop < 20; loop++)
 710                         mp->MaterialColor[loop] = MaterialGray;
 711         }
 712 }
 713
 714 ENTRYPOINT void
 715 init_morph3d(ModeInfo * mi)
 716 {
 717         morph3dstruct *mp;
 718
 719         if (morph3d == NULL) {
 720                 if ((morph3d = (morph3dstruct *) calloc(MI_NUM_SCREENS(mi),
 721                                             sizeof (morph3dstruct))) == NULL)
 722                         return;
 723         }
 724         mp = &morph3d[MI_SCREEN(mi)];
 725         mp->step = NRAND(90);
 726         mp->VisibleSpikes = 1;
 727
 728         if ((mp->glx_context = init_GL(mi)) != NULL) {
 729
 730                 reshape_morph3d(mi, MI_WIDTH(mi), MI_HEIGHT(mi));
 731                 glDrawBuffer(GL_BACK);
 732                 mp->object = MI_COUNT(mi);
 733                 if (mp->object <= 0 || mp->object > 5)
 734                         mp->object = NRAND(5) + 1;
 735                 pinit(mi);
 736         } else {
 737                 MI_CLEARWINDOW(mi);
 738         }
 739 }
 740
 741 ENTRYPOINT void
 742 draw_morph3d(ModeInfo * mi)
 743 {
 744         Display    *display = MI_DISPLAY(mi);
 745         Window      window = MI_WINDOW(mi);
 746         morph3dstruct *mp;
 747
 748         if (morph3d == NULL)
 749                 return;
 750         mp = &morph3d[MI_SCREEN(mi)];
 751
 752         MI_IS_DRAWN(mi) = True;
 753
 754         if (!mp->glx_context)
 755                 return;
 756
 757     mi->polygon_count = 0;
 758         glXMakeCurrent(display, window, *(mp->glx_context));
 759
 760         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 761
 762         glPushMatrix();
 763
 764         glTranslatef(0.0, 0.0, -10.0);
 765
 766         if (!MI_IS_ICONIC(mi)) {
 767                 glScalef(Scale4Window * mp->WindH / mp->WindW, Scale4Window, Scale4Window);
 768                 glTranslatef(2.5 * mp->WindW / mp->WindH * sin(mp->step * 1.11), 2.5 * cos(mp->step * 1.25 * 1.11), 0);
 769         } else {
 770                 glScalef(Scale4Iconic * mp->WindH / mp->WindW, Scale4Iconic, Scale4Iconic);
 771         }
 772
 773         glRotatef(mp->step * 100, 1, 0, 0);
 774         glRotatef(mp->step * 95, 0, 1, 0);
 775         glRotatef(mp->step * 90, 0, 0, 1);
 776
 777         mp->seno = (sin(mp->step) + 1.0 / 3.0) * (4.0 / 5.0) * mp->Magnitude;
 778
 779         if (mp->VisibleSpikes) {
 780 #ifdef DEBUG_CULL_FACE
 781                 int         loop;
 782
 783                 for (loop = 0; loop < 20; loop++)
 784                         mp->MaterialColor[loop] = MaterialGray;
 785 #endif
 786                 glDisable(GL_CULL_FACE);
 787         } else {
 788 #ifdef DEBUG_CULL_FACE
 789                 int         loop;
 790
 791                 for (loop = 0; loop < 20; loop++)
 792                         mp->MaterialColor[loop] = MaterialWhite;
 793 #endif
 794                 glEnable(GL_CULL_FACE);
 795         }
 796
 797         mp->draw_object(mi);
 798
 799         glPopMatrix();
 800
 801         if (MI_IS_FPS(mi)) do_fps (mi);
 802         glXSwapBuffers(display, window);
 803
 804         mp->step += 0.05;
 805 }
 806
 807 #ifndef STANDALONE
 808 ENTRYPOINT void
 809 change_morph3d(ModeInfo * mi)
 810 {
 811         morph3dstruct *mp = &morph3d[MI_SCREEN(mi)];
 812
 813         if (!mp->glx_context)
 814                 return;
 815
 816         mp->object = (mp->object) % 5 + 1;
 817         pinit(mi);
 818 }
 819 #endif /* !STANDALONE */
 820
 821 ENTRYPOINT void
 822 release_morph3d(ModeInfo * mi)
 823 {
 824         if (morph3d != NULL) {
 825                 (void) free((void *) morph3d);
 826                 morph3d = (morph3dstruct *) NULL;
 827         }
 828         FreeAllGL(mi);
 829 }
 830
 831 #endif
 832
 833 XSCREENSAVER_MODULE ("Morph3D", morph3d)