/* -*- Mode: C; tab-width: 4 -*- */
/* moebius --- Moebius Strip II, an Escher-like GL scene with ants. */
-#if !defined( lint ) && !defined( SABER )
+#if 0
static const char sccsid[] = "@(#)moebius.c 5.01 2001/03/01 xlockmore";
-
#endif
/*-
# define HACK_INIT init_moebius
# define HACK_DRAW draw_moebius
# define HACK_RESHAPE reshape_moebius
+# define HACK_HANDLE_EVENT moebius_handle_event
+# define EVENT_MASK PointerMotionMask
# define moebius_opts xlockmore_opts
# define DEFAULTS "*delay: 20000 \n" \
"*showFPS: False \n" \
#include <GL/glu.h>
#include "e_textures.h"
+#include "rotator.h"
+#include "gltrackball.h"
#define DEF_SOLIDMOEBIUS "False"
#define DEF_NOANTS "False"
static XrmOptionDescRec opts[] =
{
- {(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"}
+ {"-solidmoebius", ".moebius.solidmoebius", XrmoptionNoArg, "on"},
+ {"+solidmoebius", ".moebius.solidmoebius", XrmoptionNoArg, "off"},
+ {"-noants", ".moebius.noants", XrmoptionNoArg, "on"},
+ {"+noants", ".moebius.noants", XrmoptionNoArg, "off"}
};
static argtype vars[] =
{
- {(caddr_t *) & solidmoebius, (char *) "solidmoebius", (char *) "Solidmoebius", (char *) DEF_SOLIDMOEBIUS, t_Bool},
- {(caddr_t *) & noants, (char *) "noants", (char *) "Noants", (char *) DEF_NOANTS, t_Bool}
+ {&solidmoebius, "solidmoebius", "Solidmoebius", DEF_SOLIDMOEBIUS, t_Bool},
+ {&noants, "noants", "Noants", DEF_NOANTS, t_Bool}
};
static OptionStruct desc[] =
{
- {(char *) "-/+solidmoebius", (char *) "select between a SOLID or a NET Moebius Strip"},
- {(char *) "-/+noants", (char *) "turn on/off walking ants"}
+ {"-/+solidmoebius", "select between a SOLID or a NET Moebius Strip"},
+ {"-/+noants", "turn on/off walking ants"}
};
ModeSpecOpt moebius_opts =
GLfloat step;
GLfloat ant_position;
GLXContext *glx_context;
-
- GLfloat rotx, roty, rotz; /* current object rotation */
- GLfloat dx, dy, dz; /* current rotational velocity */
- GLfloat ddx, ddy, ddz; /* current rotational acceleration */
- GLfloat d_max; /* max velocity */
-
+ rotator *rot;
+ trackball_state *trackball;
+ Bool button_down_p;
} moebiusstruct;
static float front_shininess[] =
GL_RGB, GL_UNSIGNED_BYTE, WoodTextureData);
if (status)
{
- const char *s = gluErrorString (status);
+ const char *s = (char *) gluErrorString (status);
fprintf (stderr, "%s: error mipmapping %dx%d texture: %s\n",
progname, WoodTextureWidth, WoodTextureHeight,
(s ? s : "(unknown)"));
-/* lifted from lament.c */
-#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, Bool verbose)
+void
+release_moebius(ModeInfo * mi)
{
- double ppos = *pos;
-
- /* tick position */
- if (ppos < 0)
- ppos = -(ppos + *v);
- else
- ppos += *v;
-
- if (ppos > 1.0)
- ppos -= 1.0;
- else if (ppos < 0)
- ppos += 1.0;
-
- 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);
+ if (moebius != NULL) {
+ (void) free((void *) moebius);
+ moebius = (moebiusstruct *) NULL;
+ }
+ FreeAllGL(mi);
+}
- /* accelerate */
- *v += *dv;
+Bool
+moebius_handle_event (ModeInfo *mi, XEvent *event)
+{
+ moebiusstruct *mp = &moebius[MI_SCREEN(mi)];
- /* clamp velocity */
- if (*v > max_v || *v < -max_v)
+ if (event->xany.type == ButtonPress &&
+ event->xbutton.button & Button1)
{
- *dv = -*dv;
+ mp->button_down_p = True;
+ gltrackball_start (mp->trackball,
+ event->xbutton.x, event->xbutton.y,
+ MI_WIDTH (mi), MI_HEIGHT (mi));
+ return True;
}
- /* If it stops, start it going in the other direction. */
- else if (*v < 0)
+ else if (event->xany.type == ButtonRelease &&
+ event->xbutton.button & Button1)
{
- if (random() % 4)
- {
- *v = 0;
-
- /* keep going in the same direction */
- if (random() % 2)
- *dv = 0;
- else if (*dv < 0)
- *dv = -*dv;
- }
- else
- {
- /* reverse gears */
- *v = -*v;
- *dv = -*dv;
- *pos = -*pos;
- }
+ mp->button_down_p = False;
+ return True;
}
-
- /* Alter direction of rotational acceleration randomly. */
- if (! (random() % 120))
- *dv = -*dv;
-
- /* Change acceleration very occasionally. */
- if (! (random() % 200))
+ else if (event->xany.type == MotionNotify &&
+ mp->button_down_p)
{
- if (*dv == 0)
- *dv = 0.00001;
- else if (random() & 1)
- *dv *= 1.2;
- else
- *dv *= 0.8;
+ gltrackball_track (mp->trackball,
+ event->xmotion.x, event->xmotion.y,
+ MI_WIDTH (mi), MI_HEIGHT (mi));
+ return True;
}
-}
-void
-release_moebius(ModeInfo * mi)
-{
- if (moebius != NULL) {
- (void) free((void *) moebius);
- moebius = (moebiusstruct *) NULL;
- }
- FreeAllGL(mi);
+ return False;
}
+
void
init_moebius(ModeInfo * mi)
{
mp->step = NRAND(90);
mp->ant_position = NRAND(90);
- 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 = (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 + 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;
+ {
+ double rot_speed = 0.3;
+ mp->rot = make_rotator (rot_speed, rot_speed, rot_speed, 1, 0, True);
+ mp->trackball = gltrackball_init ();
+ }
if ((mp->glx_context = init_GL(mi)) != NULL) {
glTranslatef(0.0, 0.0, -10.0);
+ gltrackball_rotate (mp->trackball);
+
if (!MI_IS_ICONIC(mi)) {
glScalef(Scale4Window * mp->WindH / mp->WindW, Scale4Window, Scale4Window);
} else {
}
{
- GLfloat x = mp->rotx;
- GLfloat y = mp->roty;
- GLfloat z = mp->rotz;
- if (x < 0) x = 1 - (x + 1);
- if (y < 0) y = 1 - (y + 1);
- if (z < 0) z = 1 - (z + 1);
- glRotatef(x * 360, 1.0, 0.0, 0.0);
- glRotatef(y * 360, 0.0, 1.0, 0.0);
- glRotatef(z * 360, 0.0, 0.0, 1.0);
+ double x, y, z;
+ get_rotation (mp->rot, &x, &y, &z, !mp->button_down_p);
+ glRotatef (x * 360, 1.0, 0.0, 0.0);
+ glRotatef (y * 360, 0.0, 1.0, 0.0);
+ glRotatef (z * 360, 0.0, 0.0, 1.0);
}
/* moebius */
glPopMatrix();
- 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_IS_FPS(mi)) do_fps (mi);
glFlush();
projects / xscreensaver / blobdiff