-/* -*- Mode: C; tab-width: 4 -*-
- * hop --- real plane fractals.
- */
-#if !defined( lint ) && !defined( SABER )
-static const char sccsid[] = "@(#)hop.c 4.02 97/04/01 xlockmore";
+/* -*- Mode: C; tab-width: 4 -*- */
+/* hop --- real plane fractals */
+
+#if 0
+static const char sccsid[] = "@(#)hop.c 5.00 2000/11/01 xlockmore";
#endif
-/* Copyright (c) 1988-91 by Patrick J. Naughton.
+/*-
+ * Copyright (c) 1991 by Patrick J. Naughton.
*
* 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.
*
* Revision History:
- * Changes of David Bagley <bagleyd@bigfoot.com>
- * 10-May-97: jwz@netscape.com: ported from xlockmore 4.03a10 to be a
- * standalone program and thus usable with xscreensaver
- * (I threw away my 1992 port and started over.)
- * 27-Jul-95: 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-95: changed name from hopalong to hop
- * 09-Dec-94: added sine hop
- *
- * (12-Aug-92: jwz@lucid.com: made xlock version run standalone.)
- *
- * Changes of Patrick J. Naughton
- * 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 init_hop();
- * 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)
*/
+
#ifdef STANDALONE
-# define PROGCLASS "Hopalong"
-# define HACK_INIT init_hop
-# define HACK_DRAW draw_hop
-# define HACK_FREE release_hop
-# define hop_opts xlockmore_opts
-# define DEFAULTS "*count: 1000 \n" \
- "*cycles: 2500 \n" \
- "*delay: 10000 \n" \
- "*ncolors: 200 \n" \
- "*eraseSpeed: 400 \n" \
- "*eraseMode: -1 \n"
-# define SMOOTH_COLORS
-# include "xlockmore.h" /* from the xscreensaver distribution */
-# include "erase.h"
-#else /* !STANDALONE */
-# include "xlock.h" /* from the xlockmore distribution */
-#endif /* !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 */
-static Bool jong;
-static Bool sine;
+#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[] =
{
- {"-jong", ".hop.jong", XrmoptionNoArg, (caddr_t) "on"},
- {"+jong", ".hop.jong", XrmoptionNoArg, (caddr_t) "off"},
- {"-sine", ".hop.sine", XrmoptionNoArg, (caddr_t) "on"},
- {"+sine", ".hop.sine", XrmoptionNoArg, (caddr_t) "off"}
+ {"-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[] =
{
- {(caddr_t *) & jong, "jong", "Jong", DEF_JONG, t_Bool},
- {(caddr_t *) & sine, "sine", "Sine", DEF_SINE, t_Bool}
+ {&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 = { 4, opts, 2, vars, desc };
+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};
-#define SQRT 0
-#define JONG 1
-#define SINE 2
+#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 2 /* Sine might be too close to a Swastika for some... */
+#define OPS 8 /* 8, 9, 10 might be too close to a swastika for some... */
#else
-#define OPS 3
+#define OPS 11
#endif
typedef struct {
- int centerx;
- int centery; /* center of the screen */
- double a;
- double b;
- double c;
- double d;
- double i;
- double j; /* hopalong parameters */
+ 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 = NULL;
-static XPoint *pointBuffer = 0; /* pointer for XDrawPoints */
+static hopstruct *hops = (hopstruct *) NULL;
void
init_hop(ModeInfo * mi)
{
Display *display = MI_DISPLAY(mi);
GC gc = MI_GC(mi);
- hopstruct *hp;
double range;
+ hopstruct *hp;
if (hops == NULL) {
if ((hops = (hopstruct *) calloc(MI_NUM_SCREENS(mi),
}
hp = &hops[MI_SCREEN(mi)];
- hp->centerx = MI_WIN_WIDTH(mi) / 2;
- hp->centery = MI_WIN_HEIGHT(mi) / 2;
+ 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_WIN_IS_FULLRANDOM(mi)) {
- hp->op = NRAND(OPS+2); /* jwz: make the others a bit more likely. */
- if (hp->op >= OPS)
- hp->op = SQRT;
+ if (MI_IS_FULLRANDOM(mi)) {
+ hp->op = NRAND(OPS);
} else {
- hp->op = SQRT;
- if (jong)
+ 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);
}
- switch (hp->op) {
- case SQRT:
- range = sqrt((double) hp->centerx * hp->centerx +
- (double) hp->centery * hp->centery) / (10.0 + NRAND(10));
- hp->a = (LRAND() / MAXRAND) * range - range / 2.0;
- hp->b = (LRAND() / MAXRAND) * range - range / 2.0;
- hp->c = (LRAND() / MAXRAND) * range - range / 2.0;
+ 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 * M_PI - M_PI;
- hp->b = (LRAND() / MAXRAND) * 2.0 * M_PI - M_PI;
- hp->c = (LRAND() / MAXRAND) * 2.0 * M_PI - M_PI;
- hp->d = (LRAND() / MAXRAND) * 2.0 * M_PI - M_PI;
+ 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:
+ 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->i = hp->j = 0.0;
- hp->inc = (int) ((LRAND() / MAXRAND) * 200) - 100;
- hp->bufsize = MI_BATCHCOUNT(mi);
+ hp->bufsize = MI_COUNT(mi);
- if (!pointBuffer)
- pointBuffer = (XPoint *) malloc(hp->bufsize * sizeof (XPoint));
+ if (hp->pointBuffer == NULL) {
+ if ((hp->pointBuffer = (XPoint *) malloc(hp->bufsize *
+ sizeof (XPoint))) == NULL)
+ return;
+ }
- XClearWindow(display, MI_WINDOW(mi));
+ MI_CLEARWINDOW(mi);
- XSetForeground(display, gc, MI_WIN_WHITE_PIXEL(mi));
+ XSetForeground(display, gc, MI_WHITE_PIXEL(mi));
hp->count = 0;
}
void
draw_hop(ModeInfo * mi)
{
- hopstruct *hp = &hops[MI_SCREEN(mi)];
double oldj, oldi;
- XPoint *xp = pointBuffer;
- int k = hp->bufsize;
+ 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));
while (k--) {
oldj = hp->j;
switch (hp->op) {
- case SQRT:
+ case MARTIN: /* SQRT, MARTIN1 */
oldi = hp->i + hp->inc;
hp->j = hp->a - hp->i;
hp->i = oldj + ((hp->i < 0)
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;
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:
+ case SINE: /* MARTIN2 */
oldi = hp->i + hp->inc;
hp->j = hp->a - hp->i;
hp->i = oldj - sin(oldi);
xp++;
}
XDrawPoints(MI_DISPLAY(mi), MI_WINDOW(mi), MI_GC(mi),
- pointBuffer, hp->bufsize, CoordModeOrigin);
+ hp->pointBuffer, hp->bufsize, CoordModeOrigin);
if (++hp->count > MI_CYCLES(mi)) {
#ifdef STANDALONE
- erase_full_window(MI_DISPLAY(mi), MI_WINDOW(mi));
+ erase_full_window(MI_DISPLAY(mi), MI_WINDOW(mi));
#endif /* STANDALONE */
- init_hop(mi);
+ init_hop(mi);
}
}
release_hop(ModeInfo * mi)
{
if (hops != NULL) {
+ int screen;
+
+ 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 = NULL;
- }
- if (pointBuffer) {
- (void) free((void *) pointBuffer);
- pointBuffer = NULL;
+ hops = (hopstruct *) NULL;
}
}
void
refresh_hop(ModeInfo * mi)
{
- XClearWindow(MI_DISPLAY(mi), MI_WINDOW(mi));
+ MI_CLEARWINDOW(mi);
}
+
+#endif /* MODE_hop */
projects / xscreensaver / blobdiff