/* moebius --- Moebius Strip II, an Escher-like GL scene with ants. */
#if !defined( lint ) && !defined( SABER )
-static const char sccsid[] = "@(#)moebius.c 4.08 97/01/04 xlockmore";
+static const char sccsid[] = "@(#)moebius.c 5.01 2001/03/01 xlockmore";
#endif
-#undef DEBUG_LISTS
-
/*-
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted,
* other special, indirect and consequential damages.
*
* The RotateAroundU() routine was adapted from the book
- * "Computer Graphics Principles and Practice
+ * "Computer Graphics Principles and Practice
* Foley - vanDam - Feiner - Hughes
* Second Edition" Pag. 227, exercise 5.15.
- *
+ *
* This mode shows some interesting scenes that are impossible OR very
* wierd to build in the real universe. Much of the scenes are inspirated
* on Mauritz Cornelis Escher's works which derivated the mode's name.
* M.C. Escher (1898-1972) was a dutch artist and many people prefer to
* say he was a mathematician.
*
- * Thanks goes to Brian Paul for making it possible and inexpensive to use
+ * Thanks goes to Brian Paul for making it possible and inexpensive to use
* OpenGL at home.
*
* Since I'm not a native English speaker, my apologies for any grammatical
- * mistake.
+ * mistakes.
*
* My e-mail address is
- * m-vianna@usa.net
+ * mfvianna@centroin.com.br
*
* Marcelo F. Vianna (Jun-01-1997)
*
* Revision History:
- * 01-Jan-98: Mode separated from escher and renamed
- * 08-Jun-97: New scene implemented: "Impossible Cage" based in a M.C. Escher's
- * painting with the same name (quite similar). The first GL mode
- * to use texture mapping.
- * The "Impossible Cage" scene doesn't use DEPTH BUFFER, the
- * wood planks are drawn consistently using GL_CULL_FACE, and
- * the painter's algorithm is used to sort the planks.
- * Marcelo F. Vianna.
- * 07-Jun-97: Speed ups in Moebius Strip using GL_CULL_FACE.
- * Marcelo F. Vianna.
- * 03-Jun-97: Initial Release (Only one scene: "Moebius Strip")
- * The Moebius Strip scene was inspirated in a M.C. Escher's
- * painting named Moebius Strip II in wich ants walk across a
- * Moebius Strip path, sometimes meeting each other and sometimes
- * being in "opposite faces" (note that the moebius strip has
- * only one face and one edge).
- * Marcelo F. Vianna.
- *
+ * 05-Apr-2002: Removed all gllist uses (fix some bug with nvidia driver)
+ * 01-Mar-2001: backported from xscreensaver by lassauge@mail.dotcom.fr
+ * Feb-2001: Made motion and rotation be smoother Jamie Zawinski
+ * <jwz@jwz.org>
+ * 01-Nov-2000: Allocation checks
+ * 01-Jan-1998: Mode separated from escher and renamed
+ * 08-Jun-1997: New scene implemented: "Impossible Cage" based in a M.C.
+ * Escher's painting with the same name (quite similar). The
+ * first GL mode to use texture mapping.
+ * The "Impossible Cage" scene doesn't use DEPTH BUFFER, the
+ * wood planks are drawn consistently using GL_CULL_FACE, and
+ * the painter's algorithm is used to sort the planks.
+ * Marcelo F. Vianna.
+ * 07-Jun-1997: Speed ups in Moebius Strip using GL_CULL_FACE.
+ * Marcelo F. Vianna.
+ * 03-Jun-1997: Initial Release (Only one scene: "Moebius Strip")
+ * The Moebius Strip scene was inspirated in a M.C. Escher's
+ * painting named Moebius Strip II in wich ants walk across a
+ * Moebius Strip path, sometimes meeting each other and sometimes
+ * being in "opposite faces" (note that the moebius strip has
+ * only one face and one edge).
+ * Marcelo F. Vianna.
*/
/*-
* In real OpenGL, PseudoColor DO NOT support texture map (as far as I know).
*/
+#ifdef VMS
#include <X11/Intrinsic.h>
+#endif
#ifdef STANDALONE
+# define MODE_moebius
# define PROGCLASS "Moebius"
# define HACK_INIT init_moebius
# define HACK_DRAW draw_moebius
#endif /* !STANDALONE */
-#ifdef USE_GL
+#ifdef MODE_moebius
#include <GL/glu.h>
static XrmOptionDescRec opts[] =
{
- {"-solidmoebius", ".moebius.solidmoebius", XrmoptionNoArg, (caddr_t) "on"},
- {"+solidmoebius", ".moebius.solidmoebius", XrmoptionNoArg, (caddr_t) "off"},
- {"-noants", ".moebius.noants", XrmoptionNoArg, (caddr_t) "on"},
- {"+noants", ".moebius.noants", XrmoptionNoArg, (caddr_t) "off"}
+ {(char *) "-solidmoebius", (char *) ".moebius.solidmoebius", XrmoptionNoArg, (caddr_t) "on"},
+ {(char *) "+solidmoebius", (char *) ".moebius.solidmoebius", XrmoptionNoArg, (caddr_t) "off"},
+ {(char *) "-noants", (char *) ".moebius.noants", XrmoptionNoArg, (caddr_t) "on"},
+ {(char *) "+noants", (char *) ".moebius.noants", XrmoptionNoArg, (caddr_t) "off"}
};
static argtype vars[] =
{
- {(caddr_t *) & solidmoebius, "solidmoebius", "Solidmoebius", DEF_SOLIDMOEBIUS, t_Bool},
- {(caddr_t *) & noants, "noants", "Noants", DEF_NOANTS, t_Bool}
+ {(caddr_t *) & solidmoebius, (char *) "solidmoebius", (char *) "Solidmoebius", (char *) DEF_SOLIDMOEBIUS, t_Bool},
+ {(caddr_t *) & noants, (char *) "noants", (char *) "Noants", (char *) DEF_NOANTS, t_Bool}
+
};
static OptionStruct desc[] =
{
- {"-/+solidmoebius", "select between a SOLID or a NET Moebius Strip"},
- {"-/+noants", "turn on/off walking ants"}
+ {(char *) "-/+solidmoebius", (char *) "select between a SOLID or a NET Moebius Strip"},
+ {(char *) "-/+noants", (char *) "turn on/off walking ants"}
};
ModeSpecOpt moebius_opts =
#ifdef USE_MODULES
ModStruct moebius_description =
{"moebius", "init_moebius", "draw_moebius", "release_moebius",
- "draw_moebius", "change_moebius", NULL, &moebius_opts,
+ "draw_moebius", "change_moebius", (char *) NULL, &moebius_opts,
1000, 1, 1, 1, 4, 1.0, "",
"Shows Moebius Strip II, an Escher-like GL scene with ants", 0, NULL};
#define Pi M_PI
#endif
+#define ObjMoebiusStrip 0
+#define ObjAntBody 1
+#define MaxObj 2
+
/*************************************************************************/
typedef struct {
GLint WindH, WindW;
GLfloat step;
GLfloat ant_position;
- int AreObjectsDefined[2];
GLXContext *glx_context;
GLfloat rotx, roty, rotz; /* current object rotation */
static float MaterialGray8[] =
{0.8, 0.8, 0.8, 1.0};
-static moebiusstruct *moebius = NULL;
-static GLuint objects;
+static moebiusstruct *moebius = (moebiusstruct *) NULL;
#define NUM_SCENES 2
-#define ObjMoebiusStrip 0
-#define ObjAntBody 1
-
-static void
+static Bool
mySphere(float radius)
{
GLUquadricObj *quadObj;
- quadObj = gluNewQuadric();
+ if ((quadObj = gluNewQuadric()) == 0)
+ return False;
gluQuadricDrawStyle(quadObj, (GLenum) GLU_FILL);
gluSphere(quadObj, radius, 16, 16);
gluDeleteQuadric(quadObj);
+ return True;
}
-static void
+static Bool
myCone(float radius)
{
GLUquadricObj *quadObj;
- quadObj = gluNewQuadric();
+ if ((quadObj = gluNewQuadric()) == 0)
+ return False;
gluQuadricDrawStyle(quadObj, (GLenum) GLU_FILL);
gluCylinder(quadObj, radius, 0, radius * 3, 8, 1);
gluDeleteQuadric(quadObj);
+ return True;
}
-static void
+static Bool
draw_moebius_ant(moebiusstruct * mp, float *Material, int mono)
{
static float ant_step = 0;
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialGray5);
else
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, Material);
- if (!mp->AreObjectsDefined[ObjAntBody]) {
- glNewList(objects + ObjAntBody, GL_COMPILE_AND_EXECUTE);
- glEnable(GL_CULL_FACE);
- glPushMatrix();
- glScalef(1, 1.3, 1);
- mySphere(0.18);
- glScalef(1, 1 / 1.3, 1);
- glTranslatef(0.00, 0.30, 0.00);
- mySphere(0.2);
-
- glTranslatef(-0.05, 0.17, 0.05);
- glRotatef(-90, 1, 0, 0);
- glRotatef(-25, 0, 1, 0);
- myCone(0.05);
- glTranslatef(0.00, 0.10, 0.00);
- myCone(0.05);
- glRotatef(25, 0, 1, 0);
- glRotatef(90, 1, 0, 0);
-
- glScalef(1, 1.3, 1);
- glTranslatef(0.15, -0.65, 0.05);
- mySphere(0.25);
- glScalef(1, 1 / 1.3, 1);
- glPopMatrix();
- glDisable(GL_CULL_FACE);
- glEndList();
- mp->AreObjectsDefined[ObjAntBody] = 1;
-#ifdef DEBUG_LISTS
- (void) printf("Ant drawn SLOWLY\n");
-#endif
- } else {
- glCallList(objects + ObjAntBody);
-#ifdef DEBUG_LISTS
- (void) printf("Ant drawn quickly\n");
-#endif
- }
+ glEnable(GL_CULL_FACE);
+ glPushMatrix();
+ glScalef(1, 1.3, 1);
+ if (!mySphere(0.18))
+ return False;
+ glScalef(1, 1 / 1.3, 1);
+ glTranslatef(0.00, 0.30, 0.00);
+ if (!mySphere(0.2))
+ return False;
+
+ glTranslatef(-0.05, 0.17, 0.05);
+ glRotatef(-90, 1, 0, 0);
+ glRotatef(-25, 0, 1, 0);
+ if (!myCone(0.05))
+ return False;
+ glTranslatef(0.00, 0.10, 0.00);
+ if (!myCone(0.05))
+ return False;
+ glRotatef(25, 0, 1, 0);
+ glRotatef(90, 1, 0, 0);
+
+ glScalef(1, 1.3, 1);
+ glTranslatef(0.15, -0.65, 0.05);
+ if (!mySphere(0.25))
+ return False;
+ glScalef(1, 1 / 1.3, 1);
+ glPopMatrix();
+ glDisable(GL_CULL_FACE);
glDisable(GL_LIGHTING);
/* ANTENNAS */
glEnable(GL_LIGHTING);
ant_step += 0.3;
+ return True;
}
static void
#define MoebiusDivisions 40
#define MoebiusTransversals 4
-static void
+static Bool
draw_moebius_strip(ModeInfo * mi)
{
GLfloat Phi, Theta;
float Cx, Cy, Cz;
- if (!mp->AreObjectsDefined[ObjMoebiusStrip]) {
- glNewList(objects + ObjMoebiusStrip, GL_COMPILE_AND_EXECUTE);
-
- if (solidmoebius) {
+ if (solidmoebius) {
+ glBegin(GL_QUAD_STRIP);
+ Phi = 0;
+ i = 0;
+ while (i < (MoebiusDivisions * 2 + 1)) {
+ Theta = Phi / 2;
+ cPhi = cos(Phi);
+ sPhi = sin(Phi);
+
+ i++;
+ if (mono)
+ glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialWhite);
+ else if (i % 2)
+ glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialRed);
+ else
+ glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialGray);
+
+ RotateAaroundU(cPhi, sPhi, 0, -sPhi, cPhi, 0, &Cx, &Cy, &Cz, Theta);
+ glNormal3f(Cx, Cy, Cz);
+ RotateAaroundU(0, 0, 1, -sPhi, cPhi, 0, &Cx, &Cy, &Cz, Theta);
+ glVertex3f(cPhi * 3 + Cx, sPhi * 3 + Cy, +Cz);
+ glVertex3f(cPhi * 3 - Cx, sPhi * 3 - Cy, -Cz);
+
+ Phi += Pi / MoebiusDivisions;
+ }
+ glEnd();
+ } else {
+ for (j = -MoebiusTransversals; j < MoebiusTransversals; j++) {
+ glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
glBegin(GL_QUAD_STRIP);
Phi = 0;
i = 0;
cPhi = cos(Phi);
sPhi = sin(Phi);
- i++;
- if (mono)
+ RotateAaroundU(cPhi, sPhi, 0, -sPhi, cPhi, 0, &Cx, &Cy, &Cz, Theta);
+ glNormal3f(Cx, Cy, Cz);
+ RotateAaroundU(0, 0, 1, -sPhi, cPhi, 0, &Cx, &Cy, &Cz, Theta);
+ j++;
+ if (j == MoebiusTransversals || mono)
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialWhite);
else if (i % 2)
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialRed);
else
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialGray);
-
- RotateAaroundU(cPhi, sPhi, 0, -sPhi, cPhi, 0, &Cx, &Cy, &Cz, Theta);
- glNormal3f(Cx, Cy, Cz);
- RotateAaroundU(0, 0, 1, -sPhi, cPhi, 0, &Cx, &Cy, &Cz, Theta);
- glVertex3f(cPhi * 3 + Cx, sPhi * 3 + Cy, +Cz);
- glVertex3f(cPhi * 3 - Cx, sPhi * 3 - Cy, -Cz);
+ glVertex3f(cPhi * 3 + Cx / MoebiusTransversals * j, sPhi * 3 + Cy / MoebiusTransversals * j, +Cz / MoebiusTransversals * j);
+ j--;
+ if (j == -MoebiusTransversals || mono)
+ glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialWhite);
+ else if (i % 2)
+ glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialRed);
+ else
+ glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialGray);
+ glVertex3f(cPhi * 3 + Cx / MoebiusTransversals * j, sPhi * 3 + Cy / MoebiusTransversals * j, +Cz / MoebiusTransversals * j);
Phi += Pi / MoebiusDivisions;
+ i++;
}
glEnd();
- } else {
- for (j = -MoebiusTransversals; j < MoebiusTransversals; j++) {
- glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
- glBegin(GL_QUAD_STRIP);
- Phi = 0;
- i = 0;
- while (i < (MoebiusDivisions * 2 + 1)) {
- Theta = Phi / 2;
- cPhi = cos(Phi);
- sPhi = sin(Phi);
-
- RotateAaroundU(cPhi, sPhi, 0, -sPhi, cPhi, 0, &Cx, &Cy, &Cz, Theta);
- glNormal3f(Cx, Cy, Cz);
- RotateAaroundU(0, 0, 1, -sPhi, cPhi, 0, &Cx, &Cy, &Cz, Theta);
- j++;
- if (j == MoebiusTransversals || mono)
- glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialWhite);
- else if (i % 2)
- glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialRed);
- else
- glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialGray);
- glVertex3f(cPhi * 3 + Cx / MoebiusTransversals * j, sPhi * 3 + Cy / MoebiusTransversals * j, +Cz / MoebiusTransversals * j);
- j--;
- if (j == -MoebiusTransversals || mono)
- glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialWhite);
- else if (i % 2)
- glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialRed);
- else
- glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialGray);
- glVertex3f(cPhi * 3 + Cx / MoebiusTransversals * j, sPhi * 3 + Cy / MoebiusTransversals * j, +Cz / MoebiusTransversals * j);
-
- Phi += Pi / MoebiusDivisions;
- i++;
- }
- glEnd();
- }
- glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
}
-
- glEndList();
- mp->AreObjectsDefined[ObjMoebiusStrip] = 1;
-#ifdef DEBUG_LISTS
- (void) printf("Strip drawn SLOWLY\n");
-#endif
- } else {
- glCallList(objects + ObjMoebiusStrip);
-#ifdef DEBUG_LISTS
- (void) printf("Strip drawn quickly\n");
-#endif
+ glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
}
if (!noants) {
glTranslatef(3, 0, 0);
glRotatef(mp->ant_position / 2 + 90, 0, 1, 0);
glTranslatef(0.28, 0, -0.45);
- draw_moebius_ant(mp, MaterialYellow, mono);
+ if (!draw_moebius_ant(mp, MaterialYellow, mono))
+ return False;
glPopMatrix();
/* DRAW YELLOW ANT */
glTranslatef(3, 0, 0);
glRotatef(mp->ant_position / 2, 0, 1, 0);
glTranslatef(0.28, 0, -0.45);
- draw_moebius_ant(mp, MaterialBlue, mono);
+ if (!draw_moebius_ant(mp, MaterialBlue, mono))
+ return False;
glPopMatrix();
/* DRAW GREEN ANT */
glRotatef(-mp->ant_position / 2, 0, 1, 0);
glTranslatef(0.28, 0, 0.45);
glRotatef(180, 1, 0, 0);
- draw_moebius_ant(mp, MaterialGreen, mono);
+ if (!draw_moebius_ant(mp, MaterialGreen, mono))
+ return False;
glPopMatrix();
/* DRAW CYAN ANT */
glRotatef(-mp->ant_position / 2 + 90, 0, 1, 0);
glTranslatef(0.28, 0, 0.45);
glRotatef(180, 1, 0, 0);
- draw_moebius_ant(mp, MaterialCyan, mono);
+ if (!draw_moebius_ant(mp, MaterialCyan, mono))
+ return False;
glPopMatrix();
}
mp->ant_position += 1;
+ return True;
}
#undef MoebiusDivisions
#undef MoebiusTransversals
glLineWidth(1);
glPointSize(1);
}
- mp->AreObjectsDefined[ObjMoebiusStrip] = 0;
- mp->AreObjectsDefined[ObjAntBody] = 0;
}
static void
/* lifted from lament.c */
-#define RAND(n) ((long) ((random() & 0x7fffffff) % ((long) (n))))
-#define RANDSIGN() ((random() & 1) ? 1 : -1)
+#define RANDSIGN() ((LRAND() & 1) ? 1 : -1)
+#define FLOATRAND(a) (((double)LRAND() / (double)MAXRAND) * a)
static void
-rotate(GLfloat *pos, GLfloat *v, GLfloat *dv, GLfloat max_v)
+rotate(GLfloat *pos, GLfloat *v, GLfloat *dv, GLfloat max_v, Bool verbose)
{
double ppos = *pos;
else if (ppos < 0)
ppos += 1.0;
- if (ppos < 0) abort();
- if (ppos > 1.0) abort();
+ if ((ppos < 0.0) || (ppos > 1.0)) {
+ if (verbose) {
+ (void) fprintf(stderr, "Weirdness in rotate()\n");
+ (void) fprintf(stderr, "ppos = %g\n", ppos);
+ }
+ return;
+ }
+
*pos = (*pos > 0 ? ppos : -ppos);
/* accelerate */
}
}
+void
+release_moebius(ModeInfo * mi)
+{
+ if (moebius != NULL) {
+ (void) free((void *) moebius);
+ moebius = (moebiusstruct *) NULL;
+ }
+ FreeAllGL(mi);
+}
void
init_moebius(ModeInfo * mi)
{
- int screen = MI_SCREEN(mi);
moebiusstruct *mp;
if (moebius == NULL) {
sizeof (moebiusstruct))) == NULL)
return;
}
- mp = &moebius[screen];
+ mp = &moebius[MI_SCREEN(mi)];
mp->step = NRAND(90);
mp->ant_position = NRAND(90);
- mp->rotx = frand(1.0) * RANDSIGN();
- mp->roty = frand(1.0) * RANDSIGN();
- mp->rotz = frand(1.0) * RANDSIGN();
+ mp->rotx = FLOATRAND(1.0) * RANDSIGN();
+ mp->roty = FLOATRAND(1.0) * RANDSIGN();
+ mp->rotz = FLOATRAND(1.0) * RANDSIGN();
/* bell curve from 0-1.5 degrees, avg 0.75 */
- mp->dx = (frand(1) + frand(1) + frand(1)) / (360*2);
- mp->dy = (frand(1) + frand(1) + frand(1)) / (360*2);
- mp->dz = (frand(1) + frand(1) + frand(1)) / (360*2);
+ mp->dx = (FLOATRAND(1) + FLOATRAND(1) + FLOATRAND(1)) / (360*2);
+ mp->dy = (FLOATRAND(1) + FLOATRAND(1) + FLOATRAND(1)) / (360*2);
+ mp->dz = (FLOATRAND(1) + FLOATRAND(1) + FLOATRAND(1)) / (360*2);
mp->d_max = mp->dx * 2;
- mp->ddx = 0.00006 + frand(0.00003);
- mp->ddy = 0.00006 + frand(0.00003);
- mp->ddz = 0.00006 + frand(0.00003);
+ mp->ddx = 0.00006 + FLOATRAND(0.00003);
+ mp->ddy = 0.00006 + FLOATRAND(0.00003);
+ mp->ddz = 0.00006 + FLOATRAND(0.00003);
+
+ mp->ddx = 0.00001;
+ mp->ddy = 0.00001;
+ mp->ddz = 0.00001;
if ((mp->glx_context = init_GL(mi)) != NULL) {
reshape_moebius(mi, MI_WIDTH(mi), MI_HEIGHT(mi));
glDrawBuffer(GL_BACK);
- if (!glIsList(objects))
- objects = glGenLists(3);
pinit();
} else {
MI_CLEARWINDOW(mi);
void
draw_moebius(ModeInfo * mi)
{
- moebiusstruct *mp = &moebius[MI_SCREEN(mi)];
+ moebiusstruct *mp;
Display *display = MI_DISPLAY(mi);
Window window = MI_WINDOW(mi);
+ if (moebius == NULL)
+ return;
+ mp = &moebius[MI_SCREEN(mi)];
+
+ MI_IS_DRAWN(mi) = True;
+
if (!mp->glx_context)
return;
}
/* moebius */
- draw_moebius_strip(mi);
+ if (!draw_moebius_strip(mi)) {
+ release_moebius(mi);
+ return;
+ }
glPopMatrix();
- rotate(&mp->rotx, &mp->dx, &mp->ddx, mp->d_max);
- rotate(&mp->roty, &mp->dy, &mp->ddy, mp->d_max);
- rotate(&mp->rotz, &mp->dz, &mp->ddz, mp->d_max);
+ rotate(&mp->rotx, &mp->dx, &mp->ddx, mp->d_max, MI_IS_VERBOSE(mi));
+ rotate(&mp->roty, &mp->dy, &mp->ddy, mp->d_max, MI_IS_VERBOSE(mi));
+ rotate(&mp->rotz, &mp->dz, &mp->ddz, mp->d_max, MI_IS_VERBOSE(mi));
- if (mi->fps_p) do_fps (mi);
+ if (MI_IS_FPS(mi)) do_fps (mi);
glFlush();
glXSwapBuffers(display, window);
pinit();
}
-void
-release_moebius(ModeInfo * mi)
-{
- if (moebius != NULL) {
- (void) free((void *) moebius);
- moebius = NULL;
- }
- if (glIsList(objects)) {
- glDeleteLists(objects, 3);
- }
- FreeAllGL(mi);
-}
-
#endif
projects / xscreensaver / blobdiff