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