-/* xscreensaver, Copyright (c) 1992, 1995 Jamie Zawinski <jwz@netscape.com>
- *
- * 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.
- */
+/* -*- Mode: C; tab-width: 4 -*- */
+/* hop --- real plane fractals */
-/* This file was ported from xlock for use in xscreensaver (and standalone)
- * by jwz on 12-Aug-92. Original copyright reads:
- *
- * hopalong.c - Real Plane Fractals for xlock, the X Window System lockscreen.
- *
+#if 0
+static const char sccsid[] = "@(#)hop.c 5.00 2000/11/01 xlockmore";
+#endif
+
+/*-
* Copyright (c) 1991 by Patrick J. Naughton.
*
* Permission to use, copy, modify, and distribute this software and its
* event will the author be liable for any lost revenue or profits or
* other special, indirect and consequential damages.
*
- * Comments and additions should be sent to the author:
- *
- * naughton@eng.sun.com
- *
- * Patrick J. Naughton
- * MS 21-14
- * Sun Laboritories, Inc.
- * 2550 Garcia Ave
- * Mountain View, CA 94043
- *
* Revision History:
- * 29-Oct-90: fix bad (int) cast.
- * 29-Jul-90: support for multiple screens.
- * 08-Jul-90: new timing and colors and new algorithm for fractals.
- * 15-Dec-89: Fix for proper skipping of {White,Black}Pixel() in colors.
- * 08-Oct-89: Fixed long standing typo bug in RandomInitHop();
- * Fixed bug in memory allocation in inithop();
- * Moved seconds() to an extern.
- * Got rid of the % mod since .mod is slow on a sparc.
- * 20-Sep-89: Lint.
- * 31-Aug-88: Forked from xlock.c for modularity.
- * 23-Mar-88: Coded HOPALONG routines from Scientific American Sept. 86 p. 14.
+ * Changes in xlockmore distribution
+ * 01-Nov-2000: Allocation checks
+ * 24-Jun-1997: EJK and RR functions stolen from xmartin2.2
+ * Ed Kubaitis <ejk@ux2.cso.uiuc.edu> ejk functions and xmartin
+ * Renaldo Recuerdo rr function, generalized exponent version
+ * of the Barry Martin's square root function
+ * 10-May-1997: Compatible with xscreensaver
+ * 27-Jul-1995: added Peter de Jong's hop from Scientific American
+ * July 87 p. 111. Sometimes they are amazing but there are a
+ * few duds (I did not see a pattern in the parameters).
+ * 29-Mar-1995: changed name from hopalong to hop
+ * 09-Dec-1994: added Barry Martin's sine hop
+ * Changes in original xlock
+ * 29-Oct-1990: fix bad (int) cast.
+ * 29-Jul-1990: support for multiple screens.
+ * 08-Jul-1990: new timing and colors and new algorithm for fractals.
+ * 15-Dec-1989: Fix for proper skipping of {White,Black}Pixel() in colors.
+ * 08-Oct-1989: Fixed long standing typo bug in RandomInitHop();
+ * Fixed bug in memory allocation in init_hop();
+ * Moved seconds() to an extern.
+ * Got rid of the % mod since .mod is slow on a sparc.
+ * 20-Sep-1989: Lint.
+ * 31-Aug-1988: Forked from xlock.c for modularity.
+ * 23-Mar-1988: Coded HOPALONG routines from Scientific American Sept. 86 p. 14.
+ * Hopalong was attributed to Barry Martin of Aston University
+ * (Birmingham, England)
*/
-#include <math.h>
-#include "screenhack.h"
-static GC gc;
-static int batchcount = 1000;
+#ifdef STANDALONE
+#define MODE_hop
+#define PROGCLASS "Hop"
+#define HACK_INIT init_hop
+#define HACK_DRAW draw_hop
+#define hop_opts xlockmore_opts
+#define DEFAULTS "*delay: 10000 \n" \
+ "*count: 1000 \n" \
+ "*cycles: 2500 \n" \
+ "*ncolors: 200 \n"
+#define SMOOTH_COLORS
+#include "xlockmore.h" /* in xscreensaver distribution */
+#include "erase.h"
+#else /* STANDALONE */
+#include "xlock.h" /* in xlockmore distribution */
+
+#endif /* STANDALONE */
+
+#ifdef MODE_hop
+
+#define DEF_MARTIN "False"
+#define DEF_POPCORN "False"
+#define DEF_EJK1 "False"
+#define DEF_EJK2 "False"
+#define DEF_EJK3 "False"
+#define DEF_EJK4 "False"
+#define DEF_EJK5 "False"
+#define DEF_EJK6 "False"
+#define DEF_RR "False"
+#define DEF_JONG "False"
+#define DEF_SINE "False"
+
+static Bool martin;
+static Bool popcorn;
+static Bool ejk1;
+static Bool ejk2;
+static Bool ejk3;
+static Bool ejk4;
+static Bool ejk5;
+static Bool ejk6;
+static Bool rr;
+static Bool jong;
+static Bool sine;
+
+static XrmOptionDescRec opts[] =
+{
+ {"-martin", ".hop.martin", XrmoptionNoArg, "on"},
+ {"+martin", ".hop.martin", XrmoptionNoArg, "off"},
+ {"-popcorn", ".hop.popcorn", XrmoptionNoArg, "on"},
+ {"+popcorn", ".hop.popcorn", XrmoptionNoArg, "off"},
+ {"-ejk1", ".hop.ejk1", XrmoptionNoArg, "on"},
+ {"+ejk1", ".hop.ejk1", XrmoptionNoArg, "off"},
+ {"-ejk2", ".hop.ejk2", XrmoptionNoArg, "on"},
+ {"+ejk2", ".hop.ejk2", XrmoptionNoArg, "off"},
+ {"-ejk3", ".hop.ejk3", XrmoptionNoArg, "on"},
+ {"+ejk3", ".hop.ejk3", XrmoptionNoArg, "off"},
+ {"-ejk4", ".hop.ejk4", XrmoptionNoArg, "on"},
+ {"+ejk4", ".hop.ejk4", XrmoptionNoArg, "off"},
+ {"-ejk5", ".hop.ejk5", XrmoptionNoArg, "on"},
+ {"+ejk5", ".hop.ejk5", XrmoptionNoArg, "off"},
+ {"-ejk6", ".hop.ejk6", XrmoptionNoArg, "on"},
+ {"+ejk6", ".hop.ejk6", XrmoptionNoArg, "off"},
+ {"-rr", ".hop.rr", XrmoptionNoArg, "on"},
+ {"+rr", ".hop.rr", XrmoptionNoArg, "off"},
+ {"-jong", ".hop.jong", XrmoptionNoArg, "on"},
+ {"+jong", ".hop.jong", XrmoptionNoArg, "off"},
+ {"-sine", ".hop.sine", XrmoptionNoArg, "on"},
+ {"+sine", ".hop.sine", XrmoptionNoArg, "off"}
+};
+static argtype vars[] =
+{
+ {&martin, "martin", "Martin", DEF_MARTIN, t_Bool},
+ {&popcorn, "popcorn", "Popcorn", DEF_POPCORN, t_Bool},
+ {&ejk1, "ejk1", "EJK1", DEF_EJK1, t_Bool},
+ {&ejk2, "ejk2", "EJK2", DEF_EJK2, t_Bool},
+ {&ejk3, "ejk3", "EJK3", DEF_EJK3, t_Bool},
+ {&ejk4, "ejk4", "EJK4", DEF_EJK4, t_Bool},
+ {&ejk5, "ejk5", "EJK5", DEF_EJK5, t_Bool},
+ {&ejk6, "ejk6", "EJK6", DEF_EJK6, t_Bool},
+ {&rr, "rr", "RR", DEF_RR, t_Bool},
+ {&jong, "jong", "Jong", DEF_JONG, t_Bool},
+ {&sine, "sine", "Sine", DEF_SINE, t_Bool}
+};
+static OptionStruct desc[] =
+{
+ {"-/+martin", "turn on/off sqrt format"},
+ {"-/+popcorn", "turn on/off Clifford A. Pickover's popcorn format"},
+ {"-/+ejk1", "turn on/off ejk1 format"},
+ {"-/+ejk2", "turn on/off ejk2 format"},
+ {"-/+ejk3", "turn on/off ejk3 format"},
+ {"-/+ejk4", "turn on/off ejk4 format"},
+ {"-/+ejk5", "turn on/off ejk5 format"},
+ {"-/+ejk6", "turn on/off ejk6 format"},
+ {"-/+rr", "turn on/off rr format"},
+ {"-/+jong", "turn on/off jong format"},
+ {"-/+sine", "turn on/off sine format"}
+};
+
+ModeSpecOpt hop_opts =
+{sizeof opts / sizeof opts[0], opts, sizeof vars / sizeof vars[0], vars, desc};
+
+#ifdef USE_MODULES
+ModStruct hop_description =
+{"hop", "init_hop", "draw_hop", "release_hop",
+ "refresh_hop", "init_hop", (char *) NULL, &hop_opts,
+ 10000, 1000, 2500, 1, 64, 1.0, "",
+ "Shows real plane iterated fractals", 0, NULL};
-static unsigned int *pixels = 0, fg_pixel, bg_pixel;
-static int npixels;
-static unsigned int delay;
-static int timeout;
+#endif
+
+#define MARTIN 0
+#define POPCORN 7
+#define SINE 8
+#define EJK1 1
+#define EJK2 2
+#define EJK3 9
+#define EJK4 3
+#define EJK5 4
+#define EJK6 10
+#define RR 5
+#define JONG 6
+#ifdef OFFENDING
+#define OPS 8 /* 8, 9, 10 might be too close to a swastika for some... */
+#else
+#define OPS 11
+#endif
typedef struct {
- int centerx;
- int centery; /* center of the screen */
- double a;
- double b;
- double c;
- double i;
- double j; /* hopalong parameters */
- int inc;
- int pix;
- long startTime;
-} hopstruct;
-
-static hopstruct hop;
-static XPoint *pointBuffer = 0; /* pointer for XDrawPoints */
-
-static void
-inithop(dsp,win)
- Display *dsp;
- Window win;
+ int centerx, centery; /* center of the screen */
+ double a, b, c, d;
+ double i, j; /* hopalong parameters */
+ int inc;
+ int pix;
+ int op;
+ int count;
+ int bufsize;
+ XPoint *pointBuffer; /* pointer for XDrawPoints */
+} hopstruct;
+
+static hopstruct *hops = (hopstruct *) NULL;
+
+void
+init_hop(ModeInfo * mi)
{
- double range;
- XWindowAttributes xgwa;
- hopstruct *hp = &hop;
- XGCValues gcv;
- Colormap cmap;
- XGetWindowAttributes (dsp, win, &xgwa);
- cmap = xgwa.colormap;
-
- if (! pixels)
- {
- XColor color;
- int i = get_integer_resource ("ncolors", "Integer");
- int shift;
- if (i <= 2) i = 2, mono_p = True;
- shift = 360 / i;
- pixels = (unsigned int *) calloc (i, sizeof (unsigned int));
- fg_pixel = get_pixel_resource ("foreground", "Foreground", dsp, cmap);
- bg_pixel = get_pixel_resource ("background", "Background", dsp, cmap);
- if (! mono_p)
- {
- hsv_to_rgb (random () % 360, 1.0, 1.0,
- &color.red, &color.green, &color.blue);
- for (npixels = 0; npixels < i; npixels++)
- {
- if (! XAllocColor (dsp, cmap, &color))
- break;
- pixels[npixels] = color.pixel;
- cycle_hue (&color, shift);
- }
- }
- timeout = get_integer_resource ("timeout", "Seconds");
- if (timeout <= 0) timeout = 30;
- delay = get_integer_resource ("delay", "Usecs");
-
- gcv.foreground = fg_pixel;
- gc = XCreateGC (dsp, win, GCForeground, &gcv);
- }
-
- XClearWindow (dsp, win);
-
- hp->centerx = xgwa.width / 2;
- hp->centery = xgwa.height / 2;
- range = sqrt((double) hp->centerx * hp->centerx +
- (double) hp->centery * hp->centery) /
- (10.0 + random() % 10);
-
- hp->pix = 0;
-#define frand0() (((double) random()) / ((unsigned int) (~0)))
- hp->inc = (int) (frand0() * 200) - 100;
- hp->a = frand0() * range - range / 2.0;
- hp->b = frand0() * range - range / 2.0;
- hp->c = frand0() * range - range / 2.0;
- if (!(random() % 2))
- hp->c = 0.0;
-
- hp->i = hp->j = 0.0;
-
- if (!pointBuffer)
- pointBuffer = (XPoint *) malloc(batchcount * sizeof(XPoint));
-
- XSetForeground(dsp, gc, bg_pixel);
- XFillRectangle(dsp, win, gc, 0, 0,
- hp->centerx * 2, hp->centery * 2);
- XSetForeground(dsp, gc, fg_pixel);
- hp->startTime = time ((time_t *) 0);
+ Display *display = MI_DISPLAY(mi);
+ GC gc = MI_GC(mi);
+ double range;
+ hopstruct *hp;
+
+ if (hops == NULL) {
+ if ((hops = (hopstruct *) calloc(MI_NUM_SCREENS(mi),
+ sizeof (hopstruct))) == NULL)
+ return;
+ }
+ hp = &hops[MI_SCREEN(mi)];
+
+ hp->centerx = MI_WIDTH(mi) / 2;
+ hp->centery = MI_HEIGHT(mi) / 2;
+ /* Make the other operations less common since they are less interesting */
+ if (MI_IS_FULLRANDOM(mi)) {
+ hp->op = NRAND(OPS);
+ } else {
+ if (martin)
+ hp->op = MARTIN;
+ else if (popcorn)
+ hp->op = POPCORN;
+ else if (ejk1)
+ hp->op = EJK1;
+ else if (ejk2)
+ hp->op = EJK2;
+ else if (ejk3)
+ hp->op = EJK3;
+ else if (ejk4)
+ hp->op = EJK4;
+ else if (ejk5)
+ hp->op = EJK5;
+ else if (ejk6)
+ hp->op = EJK6;
+ else if (rr)
+ hp->op = RR;
+ else if (jong)
+ hp->op = JONG;
+ else if (sine)
+ hp->op = SINE;
+ else
+ hp->op = NRAND(OPS);
+ }
+
+ range = sqrt((double) hp->centerx * hp->centerx +
+ (double) hp->centery * hp->centery) / (1.0 + LRAND() / MAXRAND);
+ hp->i = hp->j = 0.0;
+ hp->inc = (int) ((LRAND() / MAXRAND) * 200) - 100;
+#undef XMARTIN
+ switch (hp->op) {
+ case MARTIN:
+#ifdef XMARTIN
+ hp->a = (LRAND() / MAXRAND) * 1500.0 + 40.0;
+ hp->b = (LRAND() / MAXRAND) * 17.0 + 3.0;
+ hp->c = (LRAND() / MAXRAND) * 3000.0 + 100.0;
+#else
+ hp->a = ((LRAND() / MAXRAND) * 2.0 - 1.0) * range / 20.0;
+ hp->b = ((LRAND() / MAXRAND) * 2.0 - 1.0) * range / 20.0;
+ if (LRAND() & 1)
+ hp->c = ((LRAND() / MAXRAND) * 2.0 - 1.0) * range / 20.0;
+ else
+ hp->c = 0.0;
+#endif
+ if (MI_IS_VERBOSE(mi))
+ (void) fprintf(stdout, "sqrt a=%g, b=%g, c=%g\n", hp->a, hp->b, hp->c);
+ break;
+ case EJK1:
+#ifdef XMARTIN
+ hp->a = (LRAND() / MAXRAND) * 500.0;
+ hp->c = (LRAND() / MAXRAND) * 100.0 + 10.0;
+#else
+ hp->a = ((LRAND() / MAXRAND) * 2.0 - 1.0) * range / 30.0;
+ hp->c = ((LRAND() / MAXRAND) * 2.0 - 1.0) * range / 40.0;
+#endif
+ hp->b = (LRAND() / MAXRAND) * 0.4;
+ if (MI_IS_VERBOSE(mi))
+ (void) fprintf(stdout, "ejk1 a=%g, b=%g, c=%g\n", hp->a, hp->b, hp->c);
+ break;
+ case EJK2:
+#ifdef XMARTIN
+ hp->a = (LRAND() / MAXRAND) * 500.0;
+#else
+ hp->a = ((LRAND() / MAXRAND) * 2.0 - 1.0) * range / 30.0;
+#endif
+ hp->b = pow(10.0, 6.0 + (LRAND() / MAXRAND) * 24.0);
+ if (LRAND() & 1)
+ hp->b = -hp->b;
+ hp->c = pow(10.0, (LRAND() / MAXRAND) * 9.0);
+ if (LRAND() & 1)
+ hp->c = -hp->c;
+ if (MI_IS_VERBOSE(mi))
+ (void) fprintf(stdout, "ejk2 a=%g, b=%g, c=%g\n", hp->a, hp->b, hp->c);
+ break;
+ case EJK3:
+#ifdef XMARTIN
+ hp->a = (LRAND() / MAXRAND) * 500.0;
+ hp->c = (LRAND() / MAXRAND) * 80.0 + 30.0;
+#else
+ hp->a = ((LRAND() / MAXRAND) * 2.0 - 1.0) * range / 30.0;
+ hp->c = ((LRAND() / MAXRAND) * 2.0 - 1.0) * range / 70.0;
+#endif
+ hp->b = (LRAND() / MAXRAND) * 0.35 + 0.5;
+ if (MI_IS_VERBOSE(mi))
+ (void) fprintf(stdout, "ejk3 a=%g, b=%g, c=%g\n", hp->a, hp->b, hp->c);
+ break;
+ case EJK4:
+#ifdef XMARTIN
+ hp->a = (LRAND() / MAXRAND) * 1000.0;
+ hp->c = (LRAND() / MAXRAND) * 40.0 + 30.0;
+#else
+ hp->a = ((LRAND() / MAXRAND) * 2.0 - 1.0) * range / 2.0;
+ hp->c = ((LRAND() / MAXRAND) * 2.0 - 1.0) * range / 200.0;
+#endif
+ hp->b = (LRAND() / MAXRAND) * 9.0 + 1.0;
+ if (MI_IS_VERBOSE(mi))
+ (void) fprintf(stdout, "ejk4 a=%g, b=%g, c=%g\n", hp->a, hp->b, hp->c);
+ break;
+ case EJK5:
+#ifdef XMARTIN
+ hp->a = (LRAND() / MAXRAND) * 600.0;
+ hp->c = (LRAND() / MAXRAND) * 90.0 + 20.0;
+#else
+ hp->a = ((LRAND() / MAXRAND) * 2.0 - 1.0) * range / 2.0;
+ hp->c = ((LRAND() / MAXRAND) * 2.0 - 1.0) * range / 200.0;
+#endif
+ hp->b = (LRAND() / MAXRAND) * 0.3 + 0.1;
+ if (MI_IS_VERBOSE(mi))
+ (void) fprintf(stdout, "ejk5 a=%g, b=%g, c=%g\n", hp->a, hp->b, hp->c);
+ break;
+ case EJK6:
+#ifdef XMARTIN
+ hp->a = (LRAND() / MAXRAND) * 100.0 + 550.0;
+#else
+ hp->a = ((LRAND() / MAXRAND) * 2.0 - 1.0) * range / 30.0;
+#endif
+ hp->b = (LRAND() / MAXRAND) + 0.5;
+ if (MI_IS_VERBOSE(mi))
+ (void) fprintf(stdout, "ejk6 a=%g, b=%g\n", hp->a, hp->b);
+ break;
+ case RR:
+#ifdef XMARTIN
+ hp->a = (LRAND() / MAXRAND) * 100.0;
+ hp->b = (LRAND() / MAXRAND) * 20.0;
+ hp->c = (LRAND() / MAXRAND) * 200.0;
+#else
+ hp->a = ((LRAND() / MAXRAND) * 2.0 - 1.0) * range / 40.0;
+ hp->b = ((LRAND() / MAXRAND) * 2.0 - 1.0) * range / 200.0;
+ hp->c = ((LRAND() / MAXRAND) * 2.0 - 1.0) * range / 20.0;
+#endif
+ hp->d = (LRAND() / MAXRAND) * 0.9;
+ if (MI_IS_VERBOSE(mi))
+ (void) fprintf(stdout, "rr a=%g, b=%g, c=%g, d=%g\n",
+ hp->a, hp->b, hp->c, hp->d);
+ break;
+ case POPCORN:
+ hp->a = 0.0;
+ hp->b = 0.0;
+ hp->c = ((LRAND() / MAXRAND) * 2.0 - 1.0) * 0.24 + 0.25;
+ hp->inc = 100;
+ if (MI_IS_VERBOSE(mi))
+ (void) fprintf(stdout, "popcorn a=%g, b=%g, c=%g, d=%g\n",
+ hp->a, hp->b, hp->c, hp->d);
+ break;
+ case JONG:
+ hp->a = ((LRAND() / MAXRAND) * 2.0 - 1.0) * M_PI;
+ hp->b = ((LRAND() / MAXRAND) * 2.0 - 1.0) * M_PI;
+ hp->c = ((LRAND() / MAXRAND) * 2.0 - 1.0) * M_PI;
+ hp->d = ((LRAND() / MAXRAND) * 2.0 - 1.0) * M_PI;
+ if (MI_IS_VERBOSE(mi))
+ (void) fprintf(stdout, "jong a=%g, b=%g, c=%g, d=%g\n",
+ hp->a, hp->b, hp->c, hp->d);
+ break;
+ case SINE: /* MARTIN2 */
+#ifdef XMARTIN
+ hp->a = M_PI + ((LRAND() / MAXRAND) * 2.0 - 1.0) * 0.07;
+#else
+ hp->a = M_PI + ((LRAND() / MAXRAND) * 2.0 - 1.0) * 0.7;
+#endif
+ if (MI_IS_VERBOSE(mi))
+ (void) fprintf(stdout, "sine a=%g\n", hp->a);
+ break;
+ }
+ if (MI_NPIXELS(mi) > 2)
+ hp->pix = NRAND(MI_NPIXELS(mi));
+ hp->bufsize = MI_COUNT(mi);
+
+ if (hp->pointBuffer == NULL) {
+ if ((hp->pointBuffer = (XPoint *) malloc(hp->bufsize *
+ sizeof (XPoint))) == NULL)
+ return;
+ }
+
+ MI_CLEARWINDOW(mi);
+
+ XSetForeground(display, gc, MI_WHITE_PIXEL(mi));
+ hp->count = 0;
}
-static void
-drawhop(dsp,win)
- Display *dsp;
- Window win;
+void
+draw_hop(ModeInfo * mi)
{
- double oldj;
- int k = batchcount;
- XPoint *xp = pointBuffer;
- hopstruct *hp = &hop;
-
- hp->inc++;
- if (! mono_p) {
- XSetForeground(dsp, gc, pixels[hp->pix]);
- if (++hp->pix >= npixels)
- hp->pix = 0;
- }
- while (k--) {
- oldj = hp->j;
- hp->j = hp->a - hp->i;
- hp->i = oldj + (hp->i < 0
- ? sqrt(fabs(hp->b * (hp->i + hp->inc) - hp->c))
- : -sqrt(fabs(hp->b * (hp->i + hp->inc) - hp->c)));
- xp->x = hp->centerx + (int) (hp->i + hp->j);
- xp->y = hp->centery - (int) (hp->i - hp->j);
- xp++;
- }
- XDrawPoints(dsp, win, gc,
- pointBuffer, batchcount, CoordModeOrigin);
- XSync (dsp, True);
- if ((time ((time_t *) 0) - hp->startTime) > timeout)
- {
- int i;
- XSetForeground(dsp, gc, bg_pixel);
- for (i = 0; i < hp->centery; i++)
- {
- int y = (random () % (hp->centery << 1));
- XDrawLine (dsp, win, gc, 0, y, hp->centerx << 1, y);
- XFlush (dsp);
- if ((i % 50) == 0)
- usleep (10000);
- }
- XClearWindow (dsp, win);
- XFlush (dsp);
- sleep (1);
- inithop(dsp,win);
- }
+ double oldj, oldi;
+ XPoint *xp;
+ int k;
+ hopstruct *hp;
+
+ if (hops == NULL)
+ return;
+ hp = &hops[MI_SCREEN(mi)];
+ if (hp->pointBuffer == NULL)
+ return;
+ xp = hp->pointBuffer;
+ k = hp->bufsize;
+
+ MI_IS_DRAWN(mi) = True;
+ hp->inc++;
+ if (MI_NPIXELS(mi) > 2) {
+ XSetForeground(MI_DISPLAY(mi), MI_GC(mi), MI_PIXEL(mi, hp->pix));
+ if (++hp->pix >= MI_NPIXELS(mi))
+ hp->pix = 0;
+ }
+ while (k--) {
+ oldj = hp->j;
+ switch (hp->op) {
+ case MARTIN: /* SQRT, MARTIN1 */
+ oldi = hp->i + hp->inc;
+ hp->j = hp->a - hp->i;
+ hp->i = oldj + ((hp->i < 0)
+ ? sqrt(fabs(hp->b * oldi - hp->c))
+ : -sqrt(fabs(hp->b * oldi - hp->c)));
+ xp->x = hp->centerx + (int) (hp->i + hp->j);
+ xp->y = hp->centery - (int) (hp->i - hp->j);
+ break;
+ case EJK1:
+ oldi = hp->i + hp->inc;
+ hp->j = hp->a - hp->i;
+ hp->i = oldj - ((hp->i > 0) ? (hp->b * oldi - hp->c) :
+ -(hp->b * oldi - hp->c));
+ xp->x = hp->centerx + (int) (hp->i + hp->j);
+ xp->y = hp->centery - (int) (hp->i - hp->j);
+ break;
+ case EJK2:
+ oldi = hp->i + hp->inc;
+ hp->j = hp->a - hp->i;
+ hp->i = oldj - ((hp->i < 0) ? log(fabs(hp->b * oldi - hp->c)) :
+ -log(fabs(hp->b * oldi - hp->c)));
+ xp->x = hp->centerx + (int) (hp->i + hp->j);
+ xp->y = hp->centery - (int) (hp->i - hp->j);
+ break;
+ case EJK3:
+ oldi = hp->i + hp->inc;
+ hp->j = hp->a - hp->i;
+ hp->i = oldj - ((hp->i > 0) ? sin(hp->b * oldi) - hp->c :
+ -sin(hp->b * oldi) - hp->c);
+ xp->x = hp->centerx + (int) (hp->i + hp->j);
+ xp->y = hp->centery - (int) (hp->i - hp->j);
+ break;
+ case EJK4:
+ oldi = hp->i + hp->inc;
+ hp->j = hp->a - hp->i;
+ hp->i = oldj - ((hp->i > 0) ? sin(hp->b * oldi) - hp->c :
+ -sqrt(fabs(hp->b * oldi - hp->c)));
+ xp->x = hp->centerx + (int) (hp->i + hp->j);
+ xp->y = hp->centery - (int) (hp->i - hp->j);
+ break;
+ case EJK5:
+ oldi = hp->i + hp->inc;
+ hp->j = hp->a - hp->i;
+ hp->i = oldj - ((hp->i > 0) ? sin(hp->b * oldi) - hp->c :
+ -(hp->b * oldi - hp->c));
+ xp->x = hp->centerx + (int) (hp->i + hp->j);
+ xp->y = hp->centery - (int) (hp->i - hp->j);
+ break;
+ case EJK6:
+ oldi = hp->i + hp->inc;
+ hp->j = hp->a - hp->i;
+ hp->i = oldj - asin((hp->b * oldi) - (long) (hp->b * oldi));
+ xp->x = hp->centerx + (int) (hp->i + hp->j);
+ xp->y = hp->centery - (int) (hp->i - hp->j);
+ break;
+ case RR: /* RR1 */
+ oldi = hp->i + hp->inc;
+ hp->j = hp->a - hp->i;
+ hp->i = oldj - ((hp->i < 0) ? -pow(fabs(hp->b * oldi - hp->c), hp->d) :
+ pow(fabs(hp->b * oldi - hp->c), hp->d));
+ xp->x = hp->centerx + (int) (hp->i + hp->j);
+ xp->y = hp->centery - (int) (hp->i - hp->j);
+ break;
+ case POPCORN:
+#define HVAL 0.05
+#define INCVAL 50
+ {
+ double tempi, tempj;
+
+ if (hp->inc >= 100)
+ hp->inc = 0;
+ if (hp->inc == 0) {
+ if (hp->a++ >= INCVAL) {
+ hp->a = 0;
+ if (hp->b++ >= INCVAL)
+ hp->b = 0;
+ }
+ hp->i = (-hp->c * INCVAL / 2 + hp->c * hp->a) * M_PI / 180.0;
+ hp->j = (-hp->c * INCVAL / 2 + hp->c * hp->b) * M_PI / 180.0;
+ }
+ tempi = hp->i - HVAL * sin(hp->j + tan(3.0 * hp->j));
+ tempj = hp->j - HVAL * sin(hp->i + tan(3.0 * hp->i));
+ xp->x = hp->centerx + (int) (MI_WIDTH(mi) / 40 * tempi);
+ xp->y = hp->centery + (int) (MI_HEIGHT(mi) / 40 * tempj);
+ hp->i = tempi;
+ hp->j = tempj;
+ }
+ break;
+ case JONG:
+ if (hp->centerx > 0)
+ oldi = hp->i + 4 * hp->inc / hp->centerx;
+ else
+ oldi = hp->i;
+ hp->j = sin(hp->c * hp->i) - cos(hp->d * hp->j);
+ hp->i = sin(hp->a * oldj) - cos(hp->b * oldi);
+ xp->x = hp->centerx + (int) (hp->centerx * (hp->i + hp->j) / 4.0);
+ xp->y = hp->centery - (int) (hp->centery * (hp->i - hp->j) / 4.0);
+ break;
+ case SINE: /* MARTIN2 */
+ oldi = hp->i + hp->inc;
+ hp->j = hp->a - hp->i;
+ hp->i = oldj - sin(oldi);
+ xp->x = hp->centerx + (int) (hp->i + hp->j);
+ xp->y = hp->centery - (int) (hp->i - hp->j);
+ break;
+ }
+ xp++;
+ }
+ XDrawPoints(MI_DISPLAY(mi), MI_WINDOW(mi), MI_GC(mi),
+ hp->pointBuffer, hp->bufsize, CoordModeOrigin);
+ if (++hp->count > MI_CYCLES(mi)) {
+#ifdef STANDALONE
+ erase_full_window(MI_DISPLAY(mi), MI_WINDOW(mi));
+#endif /* STANDALONE */
+ init_hop(mi);
+ }
}
-\f
-char *progclass = "Hopalong";
-
-char *defaults [] = {
- "Hopalong.background: black", /* to placate SGI */
- "Hopalong.foreground: white",
- "*count: 1000",
- "*ncolors: 100",
- "*timeout: 20",
- "*delay: 0",
- 0
-};
+void
+release_hop(ModeInfo * mi)
+{
+ if (hops != NULL) {
+ int screen;
-XrmOptionDescRec options [] = {
- { "-count", ".count", XrmoptionSepArg, 0 },
- { "-ncolors", ".ncolors", XrmoptionSepArg, 0 },
- { "-timeout", ".timeout", XrmoptionSepArg, 0 },
- { "-delay", ".delay", XrmoptionSepArg, 0 },
-};
-int options_size = (sizeof (options) / sizeof (options[0]));
+ for (screen = 0; screen < MI_NUM_SCREENS(mi); screen++) {
+ hopstruct *hp = &hops[screen];
+
+ if (hp->pointBuffer != NULL)
+ (void) free((void *) hp->pointBuffer);
+ }
+ (void) free((void *) hops);
+ hops = (hopstruct *) NULL;
+ }
+}
void
-screenhack (dpy, window)
- Display *dpy;
- Window window;
+refresh_hop(ModeInfo * mi)
{
- inithop (dpy, window);
- while (1)
- {
- drawhop (dpy, window);
- XSync (dpy, True);
- if (delay) usleep (delay);
- }
+ MI_CLEARWINDOW(mi);
}
+
+#endif /* MODE_hop */
projects / xscreensaver / blobdiff