-/* -*- Mode: C; tab-width: 4 -*-
- * sphere.c --- draw a bunch of shaded spheres
- */
+/* -*- Mode: C; tab-width: 4 -*- */
+/* sphere --- a bunch of shaded spheres */
+
#if !defined( lint ) && !defined( SABER )
-static const char sccsid[] = "@(#)sphere.c 4.00 97/01/01 xlockmore";
+static const char sccsid[] = "@(#)sphere.c 5.00 2000/11/01 xlockmore";
+
#endif
-/* Copyright 1988 by Sun Microsystems, Inc. Mountain View, CA.
+/*-
+ * Copyright (c) 1988 by Sun Microsystems
+ *
+ * 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.
+ *
+ * Revision History:
+ * 01-Nov-2000: Allocation checks
+ * 30-May-1997: <jwz@jwz.org> made it go vertically as well as horizontally.
+ * 27-May-1997: <jwz@jwz.org> turned into a standalone program.
+ * 02-Sep-1993: xlock version David Bagley <bagleyd@tux.org>
+ * 1988: Revised to use SunView canvas instead of gfxsw Sun Microsystems
+ * 1982: Orignal Algorithm Tom Duff Lucasfilm Ltd.
+ */
+
+/*-
+ * original copyright
+ * **************************************************************************
+ * Copyright 1988 by Sun Microsystems, Inc. Mountain View, CA.
*
* All Rights Reserved
*
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
* ***************************************************************************
- *
- * Revision History:
- * 30-May-97: jwz@jwz.org: made it go vertically as well as horizontally.
- * 27-May-97: jwz@jwz.org: turned into a standalone program.
- * 2-Sep-93: xlock version (David Bagley bagleyd@bigfoot.com)
- * 1988: Revised to use SunView canvas instead of gfxsw Sun Microsystems
- * 1982: Orignal Algorithm Tom Duff Lucasfilm Ltd.
*/
#ifdef STANDALONE
-# define PROGCLASS "Sphere"
-# define HACK_INIT init_sphere
-# define HACK_DRAW draw_sphere
-# define sphere_opts xlockmore_opts
-# define DEFAULTS "*delay: 1000 \n" \
- "*ncolors: 64 \n"
-# define BRIGHT_COLORS
-# include "xlockmore.h" /* from the xscreensaver distribution */
-#else /* !STANDALONE */
-# include "xlock.h" /* from the xlockmore distribution */
+#define MODE_sphere
+#define PROGCLASS "Sphere"
+#define HACK_INIT init_sphere
+#define HACK_DRAW draw_sphere
+#define sphere_opts xlockmore_opts
+#define DEFAULTS "*delay: 1000 \n" \
+ "*cycles: 20 \n" \
+ "*size: 0 \n" \
+ "*ncolors: 64 \n"
+#define BRIGHT_COLORS
+#include "xlockmore.h" /* from the xscreensaver distribution */
+#else /* !STANDALONE */
+#include "xlock.h" /* from the xlockmore distribution */
#endif /* !STANDALONE */
-ModeSpecOpt sphere_opts = {
- 0, NULL, 0, NULL, NULL };
+#ifdef MODE_sphere
+
+ModeSpecOpt sphere_opts =
+{0, (XrmOptionDescRec *) NULL, 0, (argtype *) NULL, (OptionStruct *) NULL};
+
+#ifdef USE_MODULES
+ModStruct sphere_description =
+{"sphere", "init_sphere", "draw_sphere", "release_sphere",
+ "refresh_sphere", "init_sphere", (char *) NULL, &sphere_opts,
+ 5000, 1, 20, 0, 64, 1.0, "",
+ "Shows a bunch of shaded spheres", 0, NULL};
+
+#endif
/*-
* (NX, NY, NZ) is the light source vector -- length should be 100
int color;
int x, y;
int dirx, diry;
+ int shadowx, shadowy;
int maxx, maxy;
XPoint *points;
} spherestruct;
-static spherestruct *spheres = NULL;
+static spherestruct *spheres = (spherestruct *) NULL;
void
init_sphere(ModeInfo * mi)
}
sp = &spheres[MI_SCREEN(mi)];
- if (sp->points) {
+ if (sp->points != NULL) {
(void) free((void *) sp->points);
- sp->points = NULL;
+ sp->points = (XPoint *) NULL;
+ }
+ sp->width = MAX(MI_WIDTH(mi), 4);
+ sp->height = MAX(MI_HEIGHT(mi), 4);
+ if ((sp->points = (XPoint *) malloc(MIN(sp->width, sp->height) *
+ sizeof (XPoint))) == NULL) {
+ return;
}
- sp->width = MI_WIN_WIDTH(mi);
- sp->height = MI_WIN_HEIGHT(mi);
- sp->points = (XPoint *) malloc(sp->height * sizeof (XPoint));
- XClearWindow(MI_DISPLAY(mi), MI_WINDOW(mi));
+ MI_CLEARWINDOW(mi);
sp->dirx = 1;
+ sp->x = sp->radius;
+ sp->shadowx = (LRAND() & 1) ? 1 : -1;
+ sp->shadowy = (LRAND() & 1) ? 1 : -1;
}
void
{
Display *display = MI_DISPLAY(mi);
GC gc = MI_GC(mi);
- spherestruct *sp = &spheres[MI_SCREEN(mi)];
- int minx = 0, maxx = 0, miny = 0, maxy = 0, npts = 0;
+ int sqrd, nd;
+ register int minx = 0, maxx = 0, miny = 0, maxy = 0, npts = 0;
+ spherestruct *sp;
+ if (spheres == NULL)
+ return;
+ sp = &spheres[MI_SCREEN(mi)];
+ if (sp->points == NULL)
+ return;
+
+ MI_IS_DRAWN(mi) = True;
if ((sp->dirx && ABS(sp->x) >= sp->radius) ||
(sp->diry && ABS(sp->y) >= sp->radius)) {
sp->radius = NRAND(MIN(sp->width / 2, sp->height / 2) - 1) + 1;
if (LRAND() & 1) {
- sp->dirx = (LRAND() & 1) * 2 - 1;
+ sp->dirx = (int) (LRAND() & 1) * 2 - 1;
sp->diry = 0;
} else {
sp->dirx = 0;
- sp->diry = (LRAND() & 1) * 2 - 1;
+ sp->diry = (int) (LRAND() & 1) * 2 - 1;
}
sp->x0 = NRAND(sp->width);
sp->y0 = NRAND(sp->height);
if (sp->x0 + sp->maxx >= sp->width)
maxx = sp->width - sp->x0;
}
- XSetForeground(display, gc, MI_WIN_BLACK_PIXEL(mi));
+ XSetForeground(display, gc, MI_BLACK_PIXEL(mi));
if (sp->dirx)
XDrawLine(display, MI_WINDOW(mi), gc,
if (MI_NPIXELS(mi) > 2)
XSetForeground(display, gc, MI_PIXEL(mi, sp->color));
else
- XSetForeground(display, gc, MI_WIN_WHITE_PIXEL(mi));
+ XSetForeground(display, gc, MI_WHITE_PIXEL(mi));
- if (sp->dirx)
+ if (sp->dirx) {
+ sqrd = sp->radius * sp->radius - sp->x * sp->x;
+ nd = NX * sp->shadowx * sp->x;
for (sp->y = miny; sp->y <= maxy; sp->y++)
- if ((NRAND(sp->radius * NR)) <=
- (NX * sp->x + NY * sp->y + NZ *
- SQRT(sp->radius * sp->radius - sp->x * sp->x - sp->y * sp->y))) {
+ if ((NRAND(sp->radius * NR)) <= nd + NY * sp->shadowy * sp->y +
+ NZ * SQRT(sqrd - sp->y * sp->y)) {
sp->points[npts].x = sp->x + sp->x0;
sp->points[npts].y = sp->y + sp->y0;
npts++;
}
- if (sp->diry)
+ }
+ if (sp->diry) {
+ sqrd = sp->radius * sp->radius - sp->y * sp->y;
+ nd = NY * sp->shadowy * sp->y;
for (sp->x = minx; sp->x <= maxx; sp->x++)
- if ((NRAND(sp->radius * NR)) <=
- (NX * sp->x + NY * sp->y + NZ *
- SQRT(sp->radius * sp->radius - sp->x * sp->x - sp->y * sp->y))) {
+ if ((NRAND(sp->radius * NR)) <= NX * sp->shadowx * sp->x + nd +
+ NZ * SQRT(sqrd - sp->x * sp->x)) {
sp->points[npts].x = sp->x + sp->x0;
sp->points[npts].y = sp->y + sp->y0;
npts++;
}
+ }
XDrawPoints(display, MI_WINDOW(mi), gc, sp->points, npts, CoordModeOrigin);
if (sp->dirx == 1) {
sp->x++;
if (sp->points) {
(void) free((void *) sp->points);
- sp->points = NULL;
+ /* sp->points = NULL; */
}
}
(void) free((void *) spheres);
- spheres = NULL;
+ spheres = (spherestruct *) NULL;
}
}
void
refresh_sphere(ModeInfo * mi)
{
- spherestruct *sp = &spheres[MI_SCREEN(mi)];
+ spherestruct *sp;
+
+ if (spheres == NULL)
+ return;
+ sp = &spheres[MI_SCREEN(mi)];
+
+ MI_CLEARWINDOW(mi);
- XClearWindow(MI_DISPLAY(mi), MI_WINDOW(mi));
sp->x = -sp->radius;
}
+
+#endif /* MODE_sphere */
projects / xscreensaver / blobdiff