X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?p=xscreensaver;a=blobdiff_plain;f=hacks%2Fglx%2Fmoebius.c;h=39229944e0bf3bc92642e4b6dd61ad1c3243b6ed;hp=0220cbbb2476a1c5b78a7092df334ce624968f9f;hb=3f9592851ce4ed76a9979bfdd6ec7dc5c457e183;hpb=cccbddbc4140cf9a06d7d95cc5c0ca36eb5d6e28 diff --git a/hacks/glx/moebius.c b/hacks/glx/moebius.c index 0220cbbb..39229944 100644 --- a/hacks/glx/moebius.c +++ b/hacks/glx/moebius.c @@ -2,12 +2,10 @@ /* 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, @@ -22,46 +20,50 @@ static const char sccsid[] = "@(#)moebius.c 4.08 97/01/04 xlockmore"; * 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 + * + * 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. */ /*- @@ -76,9 +78,12 @@ static const char sccsid[] = "@(#)moebius.c 4.08 97/01/04 xlockmore"; * In real OpenGL, PseudoColor DO NOT support texture map (as far as I know). */ +#ifdef VMS #include +#endif #ifdef STANDALONE +# define MODE_moebius # define PROGCLASS "Moebius" # define HACK_INIT init_moebius # define HACK_DRAW draw_moebius @@ -93,7 +98,7 @@ static const char sccsid[] = "@(#)moebius.c 4.08 97/01/04 xlockmore"; #endif /* !STANDALONE */ -#ifdef USE_GL +#ifdef MODE_moebius #include @@ -107,20 +112,21 @@ static int noants; 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 = @@ -129,7 +135,7 @@ 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}; @@ -144,13 +150,16 @@ ModStruct moebius_description = #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 */ @@ -200,37 +209,37 @@ static float MaterialGray6[] = 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; @@ -245,42 +254,34 @@ draw_moebius_ant(moebiusstruct * mp, float *Material, int mono) 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 */ @@ -397,6 +398,7 @@ draw_moebius_ant(moebiusstruct * mp, float *Material, int mono) glEnable(GL_LIGHTING); ant_step += 0.3; + return True; } static void @@ -422,7 +424,7 @@ RotateAaroundU(float Ax, float Ay, float Az, #define MoebiusDivisions 40 #define MoebiusTransversals 4 -static void +static Bool draw_moebius_strip(ModeInfo * mi) { GLfloat Phi, Theta; @@ -433,10 +435,35 @@ draw_moebius_strip(ModeInfo * mi) 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; @@ -445,72 +472,32 @@ draw_moebius_strip(ModeInfo * mi) 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) { @@ -520,7 +507,8 @@ draw_moebius_strip(ModeInfo * mi) 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 */ @@ -529,7 +517,8 @@ draw_moebius_strip(ModeInfo * mi) 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 */ @@ -539,7 +528,8 @@ draw_moebius_strip(ModeInfo * mi) 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 */ @@ -549,10 +539,12 @@ draw_moebius_strip(ModeInfo * mi) 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 @@ -577,8 +569,6 @@ reshape_moebius(ModeInfo * mi, int width, int height) glLineWidth(1); glPointSize(1); } - mp->AreObjectsDefined[ObjMoebiusStrip] = 0; - mp->AreObjectsDefined[ObjAntBody] = 0; } static void @@ -638,11 +628,11 @@ pinit(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; @@ -657,8 +647,14 @@ rotate(GLfloat *pos, GLfloat *v, GLfloat *dv, GLfloat max_v) 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 */ @@ -707,11 +703,19 @@ rotate(GLfloat *pos, GLfloat *v, GLfloat *dv, GLfloat max_v) } } +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) { @@ -719,31 +723,33 @@ init_moebius(ModeInfo * mi) 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); @@ -753,11 +759,17 @@ init_moebius(ModeInfo * 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; @@ -788,15 +800,18 @@ draw_moebius(ModeInfo * mi) } /* 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); @@ -816,17 +831,4 @@ change_moebius(ModeInfo * mi) pinit(); } -void -release_moebius(ModeInfo * mi) -{ - if (moebius != NULL) { - (void) free((void *) moebius); - moebius = NULL; - } - if (glIsList(objects)) { - glDeleteLists(objects, 3); - } - FreeAllGL(mi); -} - #endif