6.09HEADmaster

1 files changed, 0 insertions, 274 deletions

diff --git a/hacks/glx/rotator.c b/hacks/glx/rotator.c
deleted file mode 100644
index ab05130..0000000
--- a/hacks/glx/rotator.c
+++ /dev/null
@@ -1,274 +0,0 @@
-/* xscreensaver, Copyright (c) 1998-2016 Jamie Zawinski <jwz@jwz.org>
- *
- * Permission to use, copy, modify, distribute, and sell this software and its
- * documentation for any purpose is hereby granted without fee, provided that
- * the above copyright notice appear in all copies and that both that
- * copyright notice and this permission notice appear in supporting
- * documentation.  No representations are made about the suitability of this
- * software for any purpose.  It is provided "as is" without express or 
- * implied warranty.
- */
-
-#include <math.h>
-
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
-#include <stdlib.h>
-#include <stdio.h>
-#include "rotator.h"
-#include "yarandom.h"
-
-struct rotator {
-
-  double spin_x_speed, spin_y_speed, spin_z_speed; /* scaling factors >= 0. */
-  double wander_speed;
-
-  double rotx, roty, rotz;	/* current object rotation, -1 to +1.
-                                   Sign indicates direction of motion.
-                                   0.25 means +90 deg, positive velocity.
-                                   -0.25 means +90 deg, negative velocity
-                                   (not +270 deg or -90 deg!)
-                                   Yes, this is stupid.
-                                 */
-  double dx, dy, dz;		/* current rotational velocity, >= 0. */
-  double ddx, ddy, ddz;		/* current rotational acceleration, +/-. */
-  double d_max;			/* max rotational velocity, > 0. */
-
-  int wander_frame;		/* position in the wander cycle, >= 0. */
-};
-
-
-#undef ABS
-#define ABS(x) ((x)<0?-(x):(x))
-
-#define BELLRAND(n) ((frand((n)) + frand((n)) + frand((n))) / 3)
-#define RANDSIGN() ((random() & 1) ? 1 : -1)
-
-/* Stay in the range [0-1). 
-    1.01 => 0.01.
-   -0.01 => 0.99
- */
-#define CLAMP(i) do {   \
-    while ((i) <  0) (i)++; \
-    while ((i) >= 1) (i)--; \
-  } while (0)
-
-#undef EPSILON
-#define EPSILON 0.000001
-
-
-static void
-rotate_1 (double *pos, double *v, double *dv, double speed, double max_v)
-{
-  /* Sign of *pos is direction of motion.
-     Sign of *v is always positive.
-     It would make way more sense for *v to indicate direction of motion.
-     What was I thinking?
-   */
-
-  double ppos = *pos;
-
-  if (speed == 0) return;
-
-  /* tick position */
-  if (ppos < 0)
-    /* Ignore but preserve the sign on ppos.  It's kind of like: 
-       ppos = old_sign * (abs(ppos) + (v * old_sign))
-       This is why it would make more sense for that sign bit to be on v.
-     */
-    ppos = -(ppos + *v);
-  else
-    ppos += *v;
-
-  CLAMP (ppos);
-  *pos = (*pos > 0 ? ppos : -ppos);  /* preserve old sign bit on pos. */
-
-  /* accelerate */
-  *v += *dv;
-
-  /* clamp velocity */
-  if (*v > max_v || *v < -max_v)
-    {
-      *dv = -*dv;
-    }
-  /* If it stops, start it going in the other direction. */
-  /* Since *v is always positive, <= 0 means stopped. */
-  else if (*v < 0)
-    {
-      if (random() % 4)
-	{
-	  *v = 0;	     /* don't let velocity be negative */
-
-	  if (random() % 2)  /* stay stopped, and kill acceleration */
-	    *dv = 0;
-	  else if (*dv < 0)  /* was decelerating, accelerate instead */
-	    *dv = -*dv;
-	}
-      else
-	{
-	  *v = -*v;      /* switch to tiny positive velocity, or zero */
-	  *dv = -*dv;    /* toggle acceleration */
-	  *pos = -*pos;  /* reverse direction of motion */
-	}
-    }
-
-  /* Alter direction of rotational acceleration randomly. */
-  if (! (random() % 120))
-    *dv = -*dv;
-
-  /* Change acceleration very occasionally. */
-  if (! (random() % 200))
-    {
-#if 0 /* this might make more sense: */
-      if (*dv > -EPSILON && *dv < EPSILON)
-	*dv += 10 * (*dv < 0 ? -EPSILON : EPSILON);
-#else
-      if (*dv == 0)
-	*dv = 0.00001;
-#endif
-      else if (random() & 1)
-	*dv *= 1.2;
-      else
-	*dv *= 0.8;
-    }
-}
-
-
-/* Returns a rotator object, which encapsulates rotation and motion state.
-
-   spin_[xyz]_speed indicates the relative speed of rotation.
-   Specify 0 if you don't want any rotation around that axis.
-
-   spin_accel specifies a scaling factor for the acceleration that is
-   randomly applied to spin: if you want the speed to change faster,
-   make this > 1.
-
-   wander_speed indicates the relative speed through space.
-
-   If randomize_initial_state_p is true, then the initial position and
-   rotation will be randomized (even if the spin speeds are 0.)  If it
-   is false, then all values will be initially zeroed.
- */
-rotator *
-make_rotator (double spin_x_speed,
-              double spin_y_speed,
-              double spin_z_speed,
-              double spin_accel,
-              double wander_speed,
-              int randomize_initial_state_p)
-{
-  rotator *r = (rotator *) calloc (1, sizeof(*r));
-  double d, dd;
-
-  if (!r) return 0;
-
-  if (spin_x_speed < 0 || spin_y_speed < 0 || spin_z_speed < 0 ||
-      wander_speed < 0)
-    abort();
-
-  r->spin_x_speed = spin_x_speed;
-  r->spin_y_speed = spin_y_speed;
-  r->spin_z_speed = spin_z_speed;
-  r->wander_speed = wander_speed;
-
-  if (randomize_initial_state_p)
-    {
-      /* Sign on position is direction of travel. Stripped before returned. */
-      r->rotx = frand(1.0) * RANDSIGN();
-      r->roty = frand(1.0) * RANDSIGN();
-      r->rotz = frand(1.0) * RANDSIGN();
-
-      r->wander_frame = random() % 0xFFFF;
-    }
-  else
-    {
-      r->rotx = r->roty = r->rotz = 0;
-      r->wander_frame = 0;
-    }
-
-  d  = 0.006;
-  dd = 0.00006;
-
-  r->dx = BELLRAND(d * r->spin_x_speed);
-  r->dy = BELLRAND(d * r->spin_y_speed);
-  r->dz = BELLRAND(d * r->spin_z_speed);
-
-  r->d_max = r->dx * 2;
-
-  r->ddx = (dd + frand(dd+dd)) * r->spin_x_speed * spin_accel;
-  r->ddy = (dd + frand(dd+dd)) * r->spin_y_speed * spin_accel;
-  r->ddz = (dd + frand(dd+dd)) * r->spin_z_speed * spin_accel;
-
-# if 0
-  fprintf (stderr, "rotator:\n");
-  fprintf (stderr, "   wander: %3d %6.2f\n", r->wander_frame, r->wander_speed);
-  fprintf (stderr, "    speed: %6.2f %6.2f %6.2f\n",
-           r->spin_x_speed, r->spin_y_speed, r->spin_z_speed);
-  fprintf (stderr, "      rot: %6.2f %6.2f %6.2f\n",
-           r->rotx, r->roty, r->rotz);
-  fprintf (stderr, "        d: %6.2f %6.2f %6.2f, %6.2f\n",
-           r->dx, r->dy, r->dz,
-           r->d_max);
-  fprintf (stderr, "       dd: %6.2f %6.2f %6.2f\n",
-           r->ddx, r->ddy, r->ddz);
-# endif
-
-  return r;
-}
-
-
-void
-free_rotator (rotator *r)
-{
-  free (r);
-}
-
-void
-get_rotation (rotator *rot, double *x_ret, double *y_ret, double *z_ret,
-              int update_p)
-{
-  double x, y, z;
-
-  if (update_p) {
-    rotate_1 (&rot->rotx, &rot->dx, &rot->ddx, rot->spin_x_speed, rot->d_max);
-    rotate_1 (&rot->roty, &rot->dy, &rot->ddy, rot->spin_y_speed, rot->d_max);
-    rotate_1 (&rot->rotz, &rot->dz, &rot->ddz, rot->spin_z_speed, rot->d_max);
-  }
-
-  x = rot->rotx;
-  y = rot->roty;
-  z = rot->rotz;
-  if (x < 0) x = -x;
-  if (y < 0) y = -y;
-  if (z < 0) z = -z;
-
-  if (x_ret) *x_ret = x;
-  if (y_ret) *y_ret = y;
-  if (z_ret) *z_ret = z;
-}
-
-
-void
-get_position (rotator *rot, double *x_ret, double *y_ret, double *z_ret,
-              int update_p)
-{
-  double x = 0.5, y = 0.5, z = 0.5;
-
-  if (rot->wander_speed != 0)
-    {
-      if (update_p)
-        rot->wander_frame++;
-
-# define SINOID(F) ((1 + sin((rot->wander_frame * (F)) / 2 * M_PI)) / 2.0)
-      x = SINOID (0.71 * rot->wander_speed);
-      y = SINOID (0.53 * rot->wander_speed);
-      z = SINOID (0.37 * rot->wander_speed);
-# undef SINOID
-    }
-
-  if (x_ret) *x_ret = x;
-  if (y_ret) *y_ret = y;
-  if (z_ret) *z_ret = z;
-}