-/* -*- Mode: C; tab-width: 4 -*-
- * vines --- another geometric pattern generator.
- */
+/* -*- Mode: C; tab-width: 4 -*- */
+/* vines --- vine fractals */
+
#if !defined( lint ) && !defined( SABER )
-static const char sccsid[] = "@(#)vines.c 4.02 97/04/01 xlockmore";
+static const char sccsid[] = "@(#)vines.c 5.00 2000/11/01 xlockmore";
+
#endif
-/* xlockmore mode written by Tracy Camp
- * campt@hurrah.com 1997
- * released to the public domain
+/*-
+ * Copyright (c) 1997 by Tracy Camp campt@hurrah.com
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation for any purpose and without fee is hereby granted,
+ * provided that the above copyright notice appear in all copies and that
+ * both that copyright notice and this permission notice appear in
+ * supporting documentation.
*
+ * This file is provided AS IS with no warranties of any kind. The author
+ * shall have no liability with respect to the infringement of copyrights,
+ * trade secrets or any patents by this file or any part thereof. In no
+ * event will the author be liable for any lost revenue or profits or
+ * other special, indirect and consequential damages.
+ *
+ * If you make a modification I would of course appreciate a copy.
+ *
+ * Revision History:
+ * 01-Nov-2000: Allocation checks
+ * 11-Jul-1997: David Hansen <dhansen@metapath.com>
+ * Changed names to vines and modified draw loop
+ * to honor batchcount so vines can be grown or plotted.
+ * 10-May-1997: Compatible with xscreensaver
+ * 21-Mar-1997: David Hansen <dhansen@metapath.com>
+ * Updated mode to draw complete patterns on every
+ * iteration instead of growing the vine. Also made
+ * adjustments to randomization and changed variable
+ * names to make logic easier to follow.
+ */
+
+/*-
* This was modifed from a 'screen saver' that a friend and I
* wrote on our TI-8x calculators in high school physics one day
* Basically another geometric pattern generator, this ones claim
* to fame is a pseudo-fractal looking vine like pattern that creates
* nifty whorls and loops.
- *
- * Revision History:
- * 10-May-97: jwz@jwz.org: turned into a standalone program.
- * 21-Mar-97: David Hansen <dhansen@metapath.com>
- * Updated mode to draw complete patterns on every
- * iteration instead of growing the vine. Also made
- * adjustments to randomization and changed variable
- * names to make logic easier to follow.
*/
#ifdef STANDALONE
-# define PROGCLASS "Vines"
-# define HACK_INIT init_vines
-# define HACK_DRAW draw_vines
-# define vines_opts xlockmore_opts
-# define DEFAULTS "*delay: 200000 \n" \
- "*ncolors: 64 \n" \
- "*eraseSpeed: 400 \n" \
- "*eraseMode: -1 \n"
-# include "xlockmore.h" /* from the xscreensaver distribution */
-# include "erase.h"
-#else /* !STANDALONE */
-# include "xlock.h" /* from the xlockmore distribution */
-#endif /* !STANDALONE */
-
-ModeSpecOpt vines_opts = {
- 0, NULL, 0, NULL, NULL };
+#define MODE_vines
+#define PROGCLASS "Vines"
+#define HACK_INIT init_vines
+#define HACK_DRAW draw_vines
+#define vines_opts xlockmore_opts
+#define DEFAULTS "*delay: 200000 \n" \
+ "*count: 0 \n" \
+ "*ncolors: 64 \n"
+#include "xlockmore.h" /* in xscreensaver distribution */
+#include "erase.h"
+#else /* STANDALONE */
+#include "xlock.h" /* in xlockmore distribution */
+#endif /* STANDALONE */
+
+#ifdef MODE_vines
+
+ModeSpecOpt vines_opts =
+{0, (XrmOptionDescRec *) NULL, 0, (argtype *) NULL, (OptionStruct *) NULL};
+
+#ifdef USE_MODULES
+ModStruct vines_description =
+{"vines", "init_vines", "draw_vines", "release_vines",
+ "refresh_vines", "init_vines", (char *) NULL, &vines_opts,
+ 200000, 0, 1, 1, 64, 1.0, "",
+ "Shows fractals", 0, NULL};
+
+#endif
typedef struct {
int a;
int y1;
int x2;
int y2;
+ int i;
int length;
int iterations;
int constant;
int centery;
} vinestruct;
-static vinestruct *vines = NULL;
+static vinestruct *vines = (vinestruct *) NULL;
void
refresh_vines(ModeInfo * mi)
{
-}
+ MI_CLEARWINDOW(mi);
+} /* refresh_vines */
void
init_vines(ModeInfo * mi)
{
- Display *display = MI_DISPLAY(mi);
vinestruct *fp;
if (vines == NULL) {
- if ((vines = (vinestruct *) calloc(MI_NUM_SCREENS(mi), sizeof (vinestruct))) == NULL) {
+ if ((vines = (vinestruct *) calloc(MI_NUM_SCREENS(mi),
+ sizeof (vinestruct))) == NULL) {
return;
}
}
fp = &vines[MI_SCREEN(mi)];
+ fp->i = 0;
+ fp->length = 0;
fp->iterations = 30 + NRAND(100);
- XClearWindow(display, MI_WINDOW(mi));
-}
+ MI_CLEARWINDOW(mi);
+} /* init_vines */
void
draw_vines(ModeInfo * mi)
{
- vinestruct *fp = &vines[MI_SCREEN(mi)];
Display *display = MI_DISPLAY(mi);
GC gc = MI_GC(mi);
- int i;
+ int count;
+ vinestruct *fp;
+
+ if (vines == NULL)
+ return;
+ fp = &vines[MI_SCREEN(mi)];
- if (--(fp->iterations) == 0) {
+ /* MI_IS_DRAWN(mi) = True; */
+ if (fp->i >= fp->length) {
+ if (--(fp->iterations) == 0) {
#ifdef STANDALONE
erase_full_window(MI_DISPLAY(mi), MI_WINDOW(mi));
#endif /* STANDALONE */
- init_vines(mi);
+ init_vines(mi);
+ }
+ fp->centerx = NRAND(MI_WIDTH(mi));
+ fp->centery = NRAND(MI_HEIGHT(mi));
+
+ fp->ang = 60 + NRAND(720);
+ fp->length = 100 + NRAND(3000);
+ fp->constant = fp->length * (10 + NRAND(10));
+
+ fp->i = 0;
+ fp->a = 0;
+ fp->x1 = 0;
+ fp->y1 = 0;
+ fp->x2 = 1;
+ fp->y2 = 0;
+
+ if (MI_NPIXELS(mi) > 2)
+ XSetForeground(display, gc, MI_PIXEL(mi, NRAND(MI_NPIXELS(mi))));
+ else
+ XSetForeground(display, gc, MI_WHITE_PIXEL(mi));
}
+ count = fp->i + MI_COUNT(mi);
+ if ((count <= fp->i) || (count > fp->length))
+ count = fp->length;
- fp->centerx = NRAND(MI_WIN_WIDTH(mi));
- fp->centery = NRAND(MI_WIN_HEIGHT(mi));
-
- fp->ang = 60 + NRAND(720);
- fp->length = 100 + NRAND(3000);
- fp->constant = fp->length * (10 + NRAND(10));
-
- fp->a = 0;
- fp->x1 = 0;
- fp->y1 = 0;
- fp->x2 = 1;
- fp->y2 = 0;
-
- if (MI_NPIXELS(mi) > 2)
- XSetForeground(display, gc, MI_PIXEL(mi, NRAND(MI_NPIXELS(mi))));
- else
- XSetForeground(display, gc, MI_WIN_WHITE_PIXEL(mi));
-
-
- for (i = 0; i < fp->length; i++) {
+ while (fp->i < count) {
XDrawLine(display, MI_WINDOW(mi), gc,
fp->centerx + (fp->x1 / fp->constant),
fp->centery - (fp->y1 / fp->constant),
fp->centerx + (fp->x2 / fp->constant),
fp->centery - (fp->y2 / fp->constant));
- fp->a += (fp->ang * i);
+ fp->a += (fp->ang * fp->i);
fp->x1 = fp->x2;
fp->y1 = fp->y2;
- fp->x2 += (int) (i * ((cos(fp->a) * 360) / (2 * M_PI)));
- fp->y2 += (int) (i * ((sin(fp->a) * 360) / (2 * M_PI)));
+ fp->x2 += (int) (fp->i * (cos((double) fp->a) * 360.0) / (2.0 * M_PI));
+ fp->y2 += (int) (fp->i * (sin((double) fp->a) * 360.0) / (2.0 * M_PI));
+ fp->i++;
}
-}
+} /* draw_vines */
void
release_vines(ModeInfo * mi)
{
if (vines != NULL) {
(void) free((void *) vines);
- vines = NULL;
+ vines = (vinestruct *) NULL;
}
-}
+} /* release_vines */
+
+#endif /* MODE_vines */
projects / xscreensaver / blobdiff