+++ /dev/null
-/* xscreensaver, Copyright (c) 1999 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>
-#include "screenhack.h"
-
-#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
-# include "xdbe.h"
-#endif /* HAVE_DOUBLE_BUFFER_EXTENSION */
-
-#define countof(x) (sizeof(x)/sizeof(*(x)))
-#define ABS(x) ((x)<0?-(x):(x))
-#define MAX(x,y) ((x)<(y)?(y):(x))
-#define MIN(x,y) ((x)>(y)?(y):(x))
-#define RAND(n) ((long) ((random() & 0x7fffffff) % ((long) (n))))
-#define RANDSIGN() ((random() & 1) ? 1 : -1)
-
-struct disc {
- int theta; /* 0 - 360*64 */
- int velocity;
- int acceleration;
- int limit;
- GC gc;
- void (*draw) (Display *, Drawable, struct disc *,
- int x, int y, int radius);
-};
-
-
-static void
-draw_letters (Display *dpy, Drawable d, struct disc *disc,
- int x, int y, int radius)
-{
- XPoint points[50];
- double th2 = 2 * M_PI * (disc->theta / ((double) 360*64));
- double th;
-
- /* W */
-
- th = th2;
-
- points[0].x = x + radius * 0.8 * cos(th - 0.07);
- points[0].y = y + radius * 0.8 * sin(th - 0.07);
-
- points[1].x = x + radius * 0.7 * cos(th - 0.05);
- points[1].y = y + radius * 0.7 * sin(th - 0.05);
-
- points[2].x = x + radius * 0.78 * cos(th);
- points[2].y = y + radius * 0.78 * sin(th);
-
- points[3].x = x + radius * 0.7 * cos(th + 0.05);
- points[3].y = y + radius * 0.7 * sin(th + 0.05);
-
- points[4].x = x + radius * 0.8 * cos(th + 0.07);
- points[4].y = y + radius * 0.8 * sin(th + 0.07);
-
- XDrawLines (dpy, d, disc->gc, points, 5, CoordModeOrigin);
-
- /* 30 (1) */
-
- th = th2 + (2 * M_PI * 0.08333);
-
- points[0].x = x + radius * 0.78 * cos(th - 0.13);
- points[0].y = y + radius * 0.78 * sin(th - 0.13);
-
- points[1].x = x + radius * 0.8 * cos(th - 0.08);
- points[1].y = y + radius * 0.8 * sin(th - 0.08);
-
- points[2].x = x + radius * 0.78 * cos(th - 0.03);
- points[2].y = y + radius * 0.78 * sin(th - 0.03);
-
- points[3].x = x + radius * 0.76 * cos(th - 0.03);
- points[3].y = y + radius * 0.76 * sin(th - 0.03);
-
- points[4].x = x + radius * 0.75 * cos(th - 0.08);
- points[4].y = y + radius * 0.75 * sin(th - 0.08);
-
- points[5].x = x + radius * 0.74 * cos(th - 0.03);
- points[5].y = y + radius * 0.74 * sin(th - 0.03);
-
- points[6].x = x + radius * 0.72 * cos(th - 0.03);
- points[6].y = y + radius * 0.72 * sin(th - 0.03);
-
- points[7].x = x + radius * 0.7 * cos(th - 0.08);
- points[7].y = y + radius * 0.7 * sin(th - 0.08);
-
- points[8].x = x + radius * 0.72 * cos(th - 0.13);
- points[8].y = y + radius * 0.72 * sin(th - 0.13);
-
- XDrawLines (dpy, d, disc->gc, points, 9, CoordModeOrigin);
-
- /* 30 (2) */
-
- points[0].x = x + radius * 0.78 * cos(th + 0.03);
- points[0].y = y + radius * 0.78 * sin(th + 0.03);
-
- points[1].x = x + radius * 0.8 * cos(th + 0.08);
- points[1].y = y + radius * 0.8 * sin(th + 0.08);
-
- points[2].x = x + radius * 0.78 * cos(th + 0.13);
- points[2].y = y + radius * 0.78 * sin(th + 0.13);
-
- points[3].x = x + radius * 0.72 * cos(th + 0.13);
- points[3].y = y + radius * 0.72 * sin(th + 0.13);
-
- points[4].x = x + radius * 0.7 * cos(th + 0.08);
- points[4].y = y + radius * 0.7 * sin(th + 0.08);
-
- points[5].x = x + radius * 0.72 * cos(th + 0.03);
- points[5].y = y + radius * 0.72 * sin(th + 0.03);
-
- points[6] = points[0];
-
- XDrawLines (dpy, d, disc->gc, points, 7, CoordModeOrigin);
-
- /* 33 (1) */
-
- th = th2 + (2 * M_PI * 0.16666);
-
- points[0].x = x + radius * 0.78 * cos(th - 0.13);
- points[0].y = y + radius * 0.78 * sin(th - 0.13);
-
- points[1].x = x + radius * 0.8 * cos(th - 0.08);
- points[1].y = y + radius * 0.8 * sin(th - 0.08);
-
- points[2].x = x + radius * 0.78 * cos(th - 0.03);
- points[2].y = y + radius * 0.78 * sin(th - 0.03);
-
- points[3].x = x + radius * 0.76 * cos(th - 0.03);
- points[3].y = y + radius * 0.76 * sin(th - 0.03);
-
- points[4].x = x + radius * 0.75 * cos(th - 0.08);
- points[4].y = y + radius * 0.75 * sin(th - 0.08);
-
- points[5].x = x + radius * 0.74 * cos(th - 0.03);
- points[5].y = y + radius * 0.74 * sin(th - 0.03);
-
- points[6].x = x + radius * 0.72 * cos(th - 0.03);
- points[6].y = y + radius * 0.72 * sin(th - 0.03);
-
- points[7].x = x + radius * 0.7 * cos(th - 0.08);
- points[7].y = y + radius * 0.7 * sin(th - 0.08);
-
- points[8].x = x + radius * 0.72 * cos(th - 0.13);
- points[8].y = y + radius * 0.72 * sin(th - 0.13);
-
- XDrawLines (dpy, d, disc->gc, points, 9, CoordModeOrigin);
-
- /* 33 (2) */
-
- points[0].x = x + radius * 0.78 * cos(th + 0.03);
- points[0].y = y + radius * 0.78 * sin(th + 0.03);
-
- points[1].x = x + radius * 0.8 * cos(th + 0.08);
- points[1].y = y + radius * 0.8 * sin(th + 0.08);
-
- points[2].x = x + radius * 0.78 * cos(th + 0.13);
- points[2].y = y + radius * 0.78 * sin(th + 0.13);
-
- points[3].x = x + radius * 0.76 * cos(th + 0.13);
- points[3].y = y + radius * 0.76 * sin(th + 0.13);
-
- points[4].x = x + radius * 0.75 * cos(th + 0.08);
- points[4].y = y + radius * 0.75 * sin(th + 0.08);
-
- points[5].x = x + radius * 0.74 * cos(th + 0.13);
- points[5].y = y + radius * 0.74 * sin(th + 0.13);
-
- points[6].x = x + radius * 0.72 * cos(th + 0.13);
- points[6].y = y + radius * 0.72 * sin(th + 0.13);
-
- points[7].x = x + radius * 0.7 * cos(th + 0.08);
- points[7].y = y + radius * 0.7 * sin(th + 0.08);
-
- points[8].x = x + radius * 0.72 * cos(th + 0.03);
- points[8].y = y + radius * 0.72 * sin(th + 0.03);
-
- XDrawLines (dpy, d, disc->gc, points, 9, CoordModeOrigin);
-
- /* N */
-
- th = th2 + (2 * M_PI * 0.25);
-
- points[0].x = x + radius * 0.7 * cos(th - 0.05);
- points[0].y = y + radius * 0.7 * sin(th - 0.05);
-
- points[1].x = x + radius * 0.8 * cos(th - 0.05);
- points[1].y = y + radius * 0.8 * sin(th - 0.05);
-
- points[2].x = x + radius * 0.7 * cos(th + 0.05);
- points[2].y = y + radius * 0.7 * sin(th + 0.05);
-
- points[3].x = x + radius * 0.8 * cos(th + 0.05);
- points[3].y = y + radius * 0.8 * sin(th + 0.05);
-
- XDrawLines (dpy, d, disc->gc, points, 4, CoordModeOrigin);
-
- /* 3 */
-
- th = th2 + (2 * M_PI * 0.33333);
-
- points[0].x = x + radius * 0.78 * cos(th - 0.05);
- points[0].y = y + radius * 0.78 * sin(th - 0.05);
-
- points[1].x = x + radius * 0.8 * cos(th);
- points[1].y = y + radius * 0.8 * sin(th);
-
- points[2].x = x + radius * 0.78 * cos(th + 0.05);
- points[2].y = y + radius * 0.78 * sin(th + 0.05);
-
- points[3].x = x + radius * 0.76 * cos(th + 0.05);
- points[3].y = y + radius * 0.76 * sin(th + 0.05);
-
- points[4].x = x + radius * 0.75 * cos(th);
- points[4].y = y + radius * 0.75 * sin(th);
-
- points[5].x = x + radius * 0.74 * cos(th + 0.05);
- points[5].y = y + radius * 0.74 * sin(th + 0.05);
-
- points[6].x = x + radius * 0.72 * cos(th + 0.05);
- points[6].y = y + radius * 0.72 * sin(th + 0.05);
-
- points[7].x = x + radius * 0.7 * cos(th);
- points[7].y = y + radius * 0.7 * sin(th);
-
- points[8].x = x + radius * 0.72 * cos(th - 0.05);
- points[8].y = y + radius * 0.72 * sin(th - 0.05);
-
- XDrawLines (dpy, d, disc->gc, points, 9, CoordModeOrigin);
-
- /* 6 */
-
- th = th2 + (2 * M_PI * 0.41666);
-
- points[0].x = x + radius * 0.78 * cos(th + 0.05);
- points[0].y = y + radius * 0.78 * sin(th + 0.05);
-
- points[1].x = x + radius * 0.8 * cos(th);
- points[1].y = y + radius * 0.8 * sin(th);
-
- points[2].x = x + radius * 0.78 * cos(th - 0.05);
- points[2].y = y + radius * 0.78 * sin(th - 0.05);
-
- points[3].x = x + radius * 0.72 * cos(th - 0.05);
- points[3].y = y + radius * 0.72 * sin(th - 0.05);
-
- points[4].x = x + radius * 0.7 * cos(th);
- points[4].y = y + radius * 0.7 * sin(th);
-
- points[5].x = x + radius * 0.72 * cos(th + 0.05);
- points[5].y = y + radius * 0.72 * sin(th + 0.05);
-
- points[6].x = x + radius * 0.74 * cos(th + 0.05);
- points[6].y = y + radius * 0.74 * sin(th + 0.05);
-
- points[7].x = x + radius * 0.76 * cos(th);
- points[7].y = y + radius * 0.76 * sin(th);
-
- points[8].x = x + radius * 0.74 * cos(th - 0.05);
- points[8].y = y + radius * 0.74 * sin(th - 0.05);
-
- XDrawLines (dpy, d, disc->gc, points, 9, CoordModeOrigin);
-
-
- /* E */
-
- th = th2 + (2 * M_PI * 0.5);
-
- points[0].x = x + radius * 0.8 * cos(th + 0.05);
- points[0].y = y + radius * 0.8 * sin(th + 0.05);
-
- points[1].x = x + radius * 0.8 * cos(th - 0.05);
- points[1].y = y + radius * 0.8 * sin(th - 0.05);
-
- points[2].x = x + radius * 0.75 * cos(th - 0.05);
- points[2].y = y + radius * 0.75 * sin(th - 0.05);
-
- points[3].x = x + radius * 0.75 * cos(th + 0.025);
- points[3].y = y + radius * 0.75 * sin(th + 0.025);
-
- points[4].x = x + radius * 0.75 * cos(th - 0.05);
- points[4].y = y + radius * 0.75 * sin(th - 0.05);
-
- points[5].x = x + radius * 0.7 * cos(th - 0.05);
- points[5].y = y + radius * 0.7 * sin(th - 0.05);
-
- points[6].x = x + radius * 0.7 * cos(th + 0.05);
- points[6].y = y + radius * 0.7 * sin(th + 0.05);
-
- XDrawLines (dpy, d, disc->gc, points, 7, CoordModeOrigin);
-
- /* 12 (1) */
-
- th = th2 + (2 * M_PI * 0.58333);
-
- points[0].x = x + radius * 0.77 * cos(th - 0.06);
- points[0].y = y + radius * 0.77 * sin(th - 0.06);
-
- points[1].x = x + radius * 0.8 * cos(th - 0.03);
- points[1].y = y + radius * 0.8 * sin(th - 0.03);
-
- points[2].x = x + radius * 0.7 * cos(th - 0.03);
- points[2].y = y + radius * 0.7 * sin(th - 0.03);
-
- XDrawLines (dpy, d, disc->gc, points, 3, CoordModeOrigin);
-
- /* 12 (2) */
-
- points[0].x = x + radius * 0.78 * cos(th + 0.02);
- points[0].y = y + radius * 0.78 * sin(th + 0.02);
-
- points[1].x = x + radius * 0.8 * cos(th + 0.07);
- points[1].y = y + radius * 0.8 * sin(th + 0.07);
-
- points[2].x = x + radius * 0.78 * cos(th + 0.11);
- points[2].y = y + radius * 0.78 * sin(th + 0.11);
-
- points[3].x = x + radius * 0.76 * cos(th + 0.11);
- points[3].y = y + radius * 0.76 * sin(th + 0.11);
-
- points[4].x = x + radius * 0.74 * cos(th + 0.02);
- points[4].y = y + radius * 0.74 * sin(th + 0.02);
-
- points[5].x = x + radius * 0.71 * cos(th + 0.03);
- points[5].y = y + radius * 0.71 * sin(th + 0.03);
-
- points[6].x = x + radius * 0.7 * cos(th + 0.03);
- points[6].y = y + radius * 0.7 * sin(th + 0.03);
-
- points[7].x = x + radius * 0.7 * cos(th + 0.13);
- points[7].y = y + radius * 0.7 * sin(th + 0.13);
-
- XDrawLines (dpy, d, disc->gc, points, 8, CoordModeOrigin);
-
- /* 15 (1) */
-
- th = th2 + (2 * M_PI * 0.66666);
-
- points[0].x = x + radius * 0.77 * cos(th - 0.06);
- points[0].y = y + radius * 0.77 * sin(th - 0.06);
-
- points[1].x = x + radius * 0.8 * cos(th - 0.03);
- points[1].y = y + radius * 0.8 * sin(th - 0.03);
-
- points[2].x = x + radius * 0.7 * cos(th - 0.03);
- points[2].y = y + radius * 0.7 * sin(th - 0.03);
-
- XDrawLines (dpy, d, disc->gc, points, 3, CoordModeOrigin);
-
- /* 15 (2) */
-
- points[0].x = x + radius * 0.8 * cos(th + 0.11);
- points[0].y = y + radius * 0.8 * sin(th + 0.11);
-
- points[1].x = x + radius * 0.8 * cos(th + 0.02);
- points[1].y = y + radius * 0.8 * sin(th + 0.02);
-
- points[2].x = x + radius * 0.76 * cos(th + 0.02);
- points[2].y = y + radius * 0.76 * sin(th + 0.02);
-
- points[3].x = x + radius * 0.77 * cos(th + 0.06);
- points[3].y = y + radius * 0.77 * sin(th + 0.06);
-
- points[4].x = x + radius * 0.76 * cos(th + 0.10);
- points[4].y = y + radius * 0.76 * sin(th + 0.10);
-
- points[5].x = x + radius * 0.73 * cos(th + 0.11);
- points[5].y = y + radius * 0.73 * sin(th + 0.11);
-
- points[6].x = x + radius * 0.72 * cos(th + 0.10);
- points[6].y = y + radius * 0.72 * sin(th + 0.10);
-
- points[7].x = x + radius * 0.7 * cos(th + 0.06);
- points[7].y = y + radius * 0.7 * sin(th + 0.06);
-
- points[8].x = x + radius * 0.72 * cos(th + 0.02);
- points[8].y = y + radius * 0.72 * sin(th + 0.02);
-
- XDrawLines (dpy, d, disc->gc, points, 9, CoordModeOrigin);
-
- /* S */
-
- th = th2 + (2 * M_PI * 0.75);
-
- points[0].x = x + radius * 0.78 * cos(th + 0.05);
- points[0].y = y + radius * 0.78 * sin(th + 0.05);
-
- points[1].x = x + radius * 0.8 * cos(th);
- points[1].y = y + radius * 0.8 * sin(th);
-
- points[2].x = x + radius * 0.78 * cos(th - 0.05);
- points[2].y = y + radius * 0.78 * sin(th - 0.05);
-
- points[3].x = x + radius * 0.76 * cos(th - 0.05);
- points[3].y = y + radius * 0.76 * sin(th - 0.05);
-
- points[4].x = x + radius * 0.74 * cos(th + 0.05);
- points[4].y = y + radius * 0.74 * sin(th + 0.05);
-
- points[5].x = x + radius * 0.72 * cos(th + 0.05);
- points[5].y = y + radius * 0.72 * sin(th + 0.05);
-
- points[6].x = x + radius * 0.7 * cos(th);
- points[6].y = y + radius * 0.7 * sin(th);
-
- points[7].x = x + radius * 0.72 * cos(th - 0.05);
- points[7].y = y + radius * 0.72 * sin(th - 0.05);
-
- XDrawLines (dpy, d, disc->gc, points, 8, CoordModeOrigin);
-
- /* 21 (1) */
-
- th = th2 + (2 * M_PI * 0.83333);
-
- points[0].x = x + radius * 0.78 * cos(th - 0.13);
- points[0].y = y + radius * 0.78 * sin(th - 0.13);
-
- points[1].x = x + radius * 0.8 * cos(th - 0.08);
- points[1].y = y + radius * 0.8 * sin(th - 0.08);
-
- points[2].x = x + radius * 0.78 * cos(th - 0.03);
- points[2].y = y + radius * 0.78 * sin(th - 0.03);
-
- points[3].x = x + radius * 0.76 * cos(th - 0.03);
- points[3].y = y + radius * 0.76 * sin(th - 0.03);
-
- points[4].x = x + radius * 0.74 * cos(th - 0.12);
- points[4].y = y + radius * 0.74 * sin(th - 0.12);
-
- points[5].x = x + radius * 0.71 * cos(th - 0.13);
- points[5].y = y + radius * 0.71 * sin(th - 0.13);
-
- points[6].x = x + radius * 0.7 * cos(th - 0.13);
- points[6].y = y + radius * 0.7 * sin(th - 0.13);
-
- points[7].x = x + radius * 0.7 * cos(th - 0.02);
- points[7].y = y + radius * 0.7 * sin(th - 0.02);
-
- XDrawLines (dpy, d, disc->gc, points, 8, CoordModeOrigin);
-
- /* 21 (2) */
-
- points[0].x = x + radius * 0.77 * cos(th + 0.03);
- points[0].y = y + radius * 0.77 * sin(th + 0.03);
-
- points[1].x = x + radius * 0.8 * cos(th + 0.06);
- points[1].y = y + radius * 0.8 * sin(th + 0.06);
-
- points[2].x = x + radius * 0.7 * cos(th + 0.06);
- points[2].y = y + radius * 0.7 * sin(th + 0.06);
-
- XDrawLines (dpy, d, disc->gc, points, 3, CoordModeOrigin);
-
- /* 24 (1) */
-
- th = th2 + (2 * M_PI * 0.91666);
-
- points[0].x = x + radius * 0.78 * cos(th - 0.13);
- points[0].y = y + radius * 0.78 * sin(th - 0.13);
-
- points[1].x = x + radius * 0.8 * cos(th - 0.08);
- points[1].y = y + radius * 0.8 * sin(th - 0.08);
-
- points[2].x = x + radius * 0.78 * cos(th - 0.03);
- points[2].y = y + radius * 0.78 * sin(th - 0.03);
-
- points[3].x = x + radius * 0.76 * cos(th - 0.03);
- points[3].y = y + radius * 0.76 * sin(th - 0.03);
-
- points[4].x = x + radius * 0.74 * cos(th - 0.12);
- points[4].y = y + radius * 0.74 * sin(th - 0.12);
-
- points[5].x = x + radius * 0.71 * cos(th - 0.13);
- points[5].y = y + radius * 0.71 * sin(th - 0.13);
-
- points[6].x = x + radius * 0.7 * cos(th - 0.13);
- points[6].y = y + radius * 0.7 * sin(th - 0.13);
-
- points[7].x = x + radius * 0.7 * cos(th - 0.02);
- points[7].y = y + radius * 0.7 * sin(th - 0.02);
-
- XDrawLines (dpy, d, disc->gc, points, 8, CoordModeOrigin);
-
- /* 24 (2) */
-
- points[0].x = x + radius * 0.69 * cos(th + 0.09);
- points[0].y = y + radius * 0.69 * sin(th + 0.09);
-
- points[1].x = x + radius * 0.8 * cos(th + 0.09);
- points[1].y = y + radius * 0.8 * sin(th + 0.09);
-
- points[2].x = x + radius * 0.72 * cos(th + 0.01);
- points[2].y = y + radius * 0.72 * sin(th + 0.01);
-
- points[3].x = x + radius * 0.72 * cos(th + 0.13);
- points[3].y = y + radius * 0.72 * sin(th + 0.13);
-
- XDrawLines (dpy, d, disc->gc, points, 4, CoordModeOrigin);
-}
-
-
-static void
-draw_ticks (Display *dpy, Drawable d, struct disc *disc,
- int x, int y, int radius)
-{
- XSegment segs[72];
- int i;
- double tick = (M_PI * 2) / 72;
-
- for (i = 0; i < 72; i++)
- {
- int radius2 = radius;
- double th = (i * tick) + (2 * M_PI * (disc->theta / ((double) 360*64)));
-
- if (i % 6)
- radius2 -= radius / 16;
- else
- radius2 -= radius / 8;
-
- segs[i].x1 = x + radius * cos(th);
- segs[i].y1 = y + radius * sin(th);
- segs[i].x2 = x + radius2 * cos(th);
- segs[i].y2 = y + radius2 * sin(th);
- }
- XDrawSegments (dpy, d, disc->gc, segs, countof(segs));
-
- draw_letters (dpy, d, disc, x, y, radius);
-}
-
-
-static void
-draw_thin_arrow (Display *dpy, Drawable d, struct disc *disc,
- int x, int y, int radius)
-{
- XPoint points[3];
- double th;
- int radius2;
- double tick = ((M_PI * 2) / 72) * 2;
-
- radius *= 0.9;
- radius2 = radius - (radius / 8) * 3;
-
- th = 2 * M_PI * (disc->theta / ((double) 360*64));
-
- points[0].x = x + radius * cos(th); /* tip */
- points[0].y = y + radius * sin(th);
-
- points[1].x = x + radius2 * cos(th - tick); /* tip left */
- points[1].y = y + radius2 * sin(th - tick);
-
- points[2].x = x + radius2 * cos(th + tick); /* tip right */
- points[2].y = y + radius2 * sin(th + tick);
-
- XDrawLine (dpy, d, disc->gc,
- (int) (x + radius2 * cos(th)),
- (int) (y + radius2 * sin(th)),
- (int) (x + -radius * cos(th)),
- (int) (y + -radius * sin(th)));
-
- XFillPolygon (dpy, d, disc->gc, points, 3, Convex, CoordModeOrigin);
-}
-
-
-static void
-draw_thick_arrow (Display *dpy, Drawable d, struct disc *disc,
- int x, int y, int radius)
-{
- XPoint points[10];
- double th;
- int radius2, radius3;
- double tick = ((M_PI * 2) / 72) * 2;
-
- radius *= 0.9;
- radius2 = radius - (radius / 8) * 3;
- radius3 = radius - (radius / 8) * 2;
- th = 2 * M_PI * (disc->theta / ((double) 360*64));
-
- points[0].x = x + radius * cos(th); /* tip */
- points[0].y = y + radius * sin(th);
-
- points[1].x = x + radius2 * cos(th - tick); /* tip left */
- points[1].y = y + radius2 * sin(th - tick);
-
- points[2].x = x + radius2 * cos(th + tick); /* tip right */
- points[2].y = y + radius2 * sin(th + tick);
-
- points[3] = points[0];
-
- XDrawLines (dpy, d, disc->gc, points, 4, CoordModeOrigin);
-
- points[0].x = x + radius2 * cos(th - tick/2); /* top left */
- points[0].y = y + radius2 * sin(th - tick/2);
-
- points[1].x = x + -radius2 * cos(th + tick/2); /* bottom left */
- points[1].y = y + -radius2 * sin(th + tick/2);
-
- points[2].x = x + -radius3 * cos(th); /* bottom */
- points[2].y = y + -radius3 * sin(th);
-
- points[3].x = x + -radius * cos(th); /* bottom spike */
- points[3].y = y + -radius * sin(th);
-
- points[4] = points[2]; /* return */
-
- points[5].x = x + -radius2 * cos(th - tick/2); /* bottom right */
- points[5].y = y + -radius2 * sin(th - tick/2);
-
- points[6].x = x + radius2 * cos(th + tick/2); /* top right */
- points[6].y = y + radius2 * sin(th + tick/2);
-
- XDrawLines (dpy, d, disc->gc, points, 7, CoordModeOrigin);
-}
-
-
-
-static void
-roll_disc (struct disc *disc)
-{
- double th = disc->theta;
- if (th < 0)
- th = -(th + disc->velocity);
- else
- th = (th + disc->velocity);
-
- if (th > (360*64))
- th -= (360*64);
- else if (th < 0)
- th += (360*64);
-
- disc->theta = (disc->theta > 0 ? th : -th);
-
- disc->velocity += disc->acceleration;
-
- if (disc->velocity > disc->limit ||
- disc->velocity < -disc->limit)
- disc->acceleration = -disc->acceleration;
-
- /* Alter direction of rotational acceleration randomly. */
- if (! (random() % 120))
- disc->acceleration = -disc->acceleration;
-
- /* Change acceleration very occasionally. */
- if (! (random() % 200))
- {
- if (random() & 1)
- disc->acceleration *= 1.2;
- else
- disc->acceleration *= 0.8;
- }
-}
-
-
-static void
-init_spin (struct disc *disc)
-{
- disc->limit = 5*64;
- disc->theta = RAND(360*64);
- disc->velocity = RAND(16) * RANDSIGN();
- disc->acceleration = RAND(16) * RANDSIGN();
-}
-
-
-static void
-draw_compass (Display *dpy, Drawable d, struct disc **discs,
- int x, int y, int radius)
-{
- int i = 0;
- while (discs[i])
- {
- discs[i]->draw (dpy, d, discs[i], x, y, radius);
- roll_disc (discs[i]);
- i++;
- }
-}
-
-static void
-draw_pointer (Display *dpy, Drawable d, GC ptr_gc, GC dot_gc,
- int x, int y, int radius)
-{
- XPoint points[3];
- int size = radius * 0.1;
-
- /* top */
-
- points[0].x = x - size;
- points[0].y = y - radius - size;
-
- points[1].x = x + size;
- points[1].y = y - radius - size;
-
- points[2].x = x;
- points[2].y = y - radius;
-
- XFillPolygon (dpy, d, ptr_gc, points, 3, Convex, CoordModeOrigin);
-
- /* top right */
-
- points[0].x = x - (radius * 0.85);
- points[0].y = y - (radius * 0.8);
-
- points[1].x = x - (radius * 1.1);
- points[1].y = y - (radius * 0.55);
-
- points[2].x = x - (radius * 0.6);
- points[2].y = y - (radius * 0.65);
-
- XFillPolygon (dpy, d, ptr_gc, points, 3, Convex, CoordModeOrigin);
-
- /* left */
-
- points[0].x = x - (radius * 1.05);
- points[0].y = y;
-
- points[1].x = x - (radius * 1.1);
- points[1].y = y - (radius * 0.025);
-
- points[2].x = x - (radius * 1.1);
- points[2].y = y + (radius * 0.025);
-
- XFillPolygon (dpy, d, dot_gc, points, 3, Convex, CoordModeOrigin);
-
- /* right */
-
- points[0].x = x + (radius * 1.05);
- points[0].y = y;
-
- points[1].x = x + (radius * 1.1);
- points[1].y = y - (radius * 0.025);
-
- points[2].x = x + (radius * 1.1);
- points[2].y = y + (radius * 0.025);
-
- XFillPolygon (dpy, d, dot_gc, points, 3, Convex, CoordModeOrigin);
-
- /* bottom */
-
- points[0].x = x;
- points[0].y = y + (radius * 1.05);
-
- points[1].x = x - (radius * 0.025);
- points[1].y = y + (radius * 1.1);
-
- points[2].x = x + (radius * 0.025);
- points[2].y = y + (radius * 1.1);
-
- XFillPolygon (dpy, d, dot_gc, points, 3, Convex, CoordModeOrigin);
-
- /* bottom left */
-
- points[0].x = x + (radius * 0.74);
- points[0].y = y + (radius * 0.74);
-
- points[1].x = x + (radius * 0.78);
- points[1].y = y + (radius * 0.75);
-
- points[2].x = x + (radius * 0.75);
- points[2].y = y + (radius * 0.78);
-
- XFillPolygon (dpy, d, dot_gc, points, 3, Convex, CoordModeOrigin);
-
- /* top left */
-
- points[0].x = x + (radius * 0.74);
- points[0].y = y - (radius * 0.74);
-
- points[1].x = x + (radius * 0.78);
- points[1].y = y - (radius * 0.75);
-
- points[2].x = x + (radius * 0.75);
- points[2].y = y - (radius * 0.78);
-
- XFillPolygon (dpy, d, dot_gc, points, 3, Convex, CoordModeOrigin);
-
- /* bottom right */
-
- points[0].x = x - (radius * 0.74);
- points[0].y = y + (radius * 0.74);
-
- points[1].x = x - (radius * 0.78);
- points[1].y = y + (radius * 0.75);
-
- points[2].x = x - (radius * 0.75);
- points[2].y = y + (radius * 0.78);
-
- XFillPolygon (dpy, d, dot_gc, points, 3, Convex, CoordModeOrigin);
-}
-
-\f
-char *progclass = "Compass";
-
-char *defaults [] = {
- ".background: #000000",
- ".foreground: #DDFFFF",
- "*arrow1Foreground: #FFF66A",
- "*arrow2Foreground: #F7D64A",
- "*pointerForeground: #FF0000",
- "*delay: 10000",
- "*doubleBuffer: True",
-#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
- "*useDBE: True",
-#endif /* HAVE_DOUBLE_BUFFER_EXTENSION */
- 0
-};
-
-XrmOptionDescRec options [] = {
- { "-delay", ".delay", XrmoptionSepArg, 0 },
- { "-db", ".doubleBuffer", XrmoptionNoArg, "True" },
- { "-no-db", ".doubleBuffer", XrmoptionNoArg, "False" },
- { 0, 0, 0, 0 }
-};
-
-void
-screenhack (Display *dpy, Window window)
-{
- XGCValues gcv;
- int delay = get_integer_resource ("delay", "Integer");
- Bool dbuf = get_boolean_resource ("doubleBuffer", "Boolean");
- struct disc *discs[4];
- int x, y, size, size2;
- GC ptr_gc;
- GC erase_gc = 0;
- XWindowAttributes xgwa;
- Pixmap b=0, ba=0, bb=0; /* double-buffer to reduce flicker */
-#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
- XdbeBackBuffer backb = 0;
-#endif /* HAVE_DOUBLE_BUFFER_EXTENSION */
-
- XGetWindowAttributes (dpy, window, &xgwa);
- size2 = MIN(xgwa.width, xgwa.height);
-
- if (size2 > 600) size2 = 600;
-
- size = (size2 / 2) * 0.8;
-
- x = xgwa.width/2;
- y = xgwa.height/2;
-
- if (dbuf)
- {
-#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
- b = backb = xdbe_get_backbuffer (dpy, window, XdbeUndefined);
-#endif /* HAVE_DOUBLE_BUFFER_EXTENSION */
-
- if (!b)
- {
- x = size2/2;
- y = size2/2;
- ba = XCreatePixmap (dpy, window, size2, size2, xgwa.depth);
- bb = XCreatePixmap (dpy, window, size2, size2, xgwa.depth);
- b = ba;
- }
- }
- else
- {
- b = window;
- }
-
- discs[0] = (struct disc *) calloc (1, sizeof (struct disc));
- discs[1] = (struct disc *) calloc (1, sizeof (struct disc));
- discs[2] = (struct disc *) calloc (1, sizeof (struct disc));
- discs[3] = 0;
-
- gcv.foreground = get_pixel_resource ("foreground", "Foreground",
- dpy, xgwa.colormap);
- gcv.line_width = MAX(2, (size/60));
- gcv.join_style = JoinBevel;
- discs[0]->draw = draw_ticks;
- discs[0]->gc = XCreateGC (dpy, b, GCForeground|GCLineWidth|GCJoinStyle,
- &gcv);
- init_spin (discs[0]);
-
- gcv.foreground = get_pixel_resource ("arrow2Foreground", "Foreground",
- dpy, xgwa.colormap);
- gcv.line_width = MAX(4, (size / 30));
- discs[1]->draw = draw_thick_arrow;
- discs[1]->gc = XCreateGC (dpy, b, GCForeground|GCLineWidth, &gcv);
- init_spin (discs[1]);
-
- gcv.foreground = get_pixel_resource ("arrow1Foreground", "Foreground",
- dpy, xgwa.colormap);
- gcv.line_width = MAX(4, (size / 30));
- discs[2]->draw = draw_thin_arrow;
- discs[2]->gc = XCreateGC (dpy, b, GCForeground|GCLineWidth, &gcv);
- init_spin (discs[2]);
-
- gcv.foreground = get_pixel_resource ("pointerForeground", "Foreground",
- dpy, xgwa.colormap);
- ptr_gc = XCreateGC (dpy, b, GCForeground|GCLineWidth, &gcv);
-
- gcv.foreground = get_pixel_resource ("background", "Background",
- dpy, xgwa.colormap);
- erase_gc = XCreateGC (dpy, b, GCForeground, &gcv);
-
- if (ba) XFillRectangle (dpy, ba, erase_gc, 0, 0, size2, size2);
- if (bb) XFillRectangle (dpy, bb, erase_gc, 0, 0, size2, size2);
-
- while (1)
- {
- XFillRectangle (dpy, b, erase_gc, 0, 0, xgwa.width, xgwa.height);
-
- draw_compass (dpy, b, discs, x, y, size);
- draw_pointer (dpy, b, ptr_gc, discs[0]->gc, x, y, size);
-
-#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
- if (backb)
- {
- XdbeSwapInfo info[1];
- info[0].swap_window = window;
- info[0].swap_action = XdbeUndefined;
- XdbeSwapBuffers (dpy, info, 1);
- }
- else
-#endif /* HAVE_DOUBLE_BUFFER_EXTENSION */
- if (dbuf)
- {
- XCopyArea (dpy, b, window, erase_gc, 0, 0,
- size2, size2,
- xgwa.width/2 - x,
- xgwa.height/2 - y);
- b = (b == ba ? bb : ba);
- }
-
- XSync (dpy, False);
- screenhack_handle_events (dpy);
- if (delay)
- usleep (delay);
- }
-}
projects / xscreensaver / blobdiff