--- /dev/null
+/* xscreensaver, Copyright (c) 1992, 1995, 1996, 1998
+ * 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.
+ *
+ * This code derived from TI Explorer Lisp code by Joe Keane, Fritz Mueller,
+ * and Jamie Zawinski.
+ */
+
+#include <math.h>
+#include "screenhack.h"
+
+static Display *dpy;
+static Window window;
+static GC color0, color1, color2, color3, color4, color5, color6, color7;
+static GC black;
+
+static int delay;
+
+static int observer_z;
+static int x_offset, y_offset;
+static int unit_pixels;
+
+struct point_state {
+ int old_x, old_y;
+ int new_x, new_y;
+ Bool same_p;
+};
+
+static void
+move_line (struct point_state *state0, struct point_state *state1, GC gc)
+{
+ if (state0->same_p && state1->same_p)
+ return;
+ if (mono_p)
+ {
+ XDrawLine (dpy, window, black,
+ state0->old_x, state0->old_y, state1->old_x, state1->old_y);
+ XDrawLine (dpy, window, gc,
+ state0->new_x, state0->new_y, state1->new_x, state1->new_y);
+ }
+ else
+ {
+ XSegment segments [2];
+ segments [0].x1 = state0->old_x; segments [0].y1 = state0->old_y;
+ segments [0].x2 = state1->old_x; segments [0].y2 = state1->old_y;
+ segments [1].x1 = state0->new_x; segments [1].y1 = state0->new_y;
+ segments [1].x2 = state1->new_x; segments [1].y2 = state1->new_y;
+ XDrawSegments (dpy, window, gc, segments, 2);
+ }
+}
+
+static void
+hyper (double xy, double xz, double yz, double xw, double yw, double zw)
+{
+ double cos_xy = cos (xy), sin_xy = sin (xy);
+ double cos_xz = cos (xz), sin_xz = sin (xz);
+ double cos_yz = cos (yz), sin_yz = sin (yz);
+ double cos_xw = cos (xw), sin_xw = sin (xw);
+ double cos_yw = cos (yw), sin_yw = sin (yw);
+ double cos_zw = cos (zw), sin_zw = sin (zw);
+
+ double ax = 1.0, ay = 0.0, az = 0.0, aw = 0.0;
+ double bx = 0.0, by = 1.0, bz = 0.0, bw = 0.0;
+ double cx = 0.0, cy = 0.0, cz = 1.0, cw = 0.0;
+ double dx = 0.0, dy = 0.0, dz = 0.0, dw = 1.0;
+
+ double _tmp0_, _tmp1_;
+
+ struct point_state points [16];
+ memset (points, 0, sizeof (points));
+
+#define mmmm (&points[0])
+#define mmmp (&points[1])
+#define mmpm (&points[2])
+#define mmpp (&points[3])
+#define mpmm (&points[4])
+#define mpmp (&points[5])
+#define mppm (&points[6])
+#define mppp (&points[7])
+#define pmmm (&points[8])
+#define pmmp (&points[9])
+#define pmpm (&points[10])
+#define pmpp (&points[11])
+#define ppmm (&points[12])
+#define ppmp (&points[13])
+#define pppm (&points[14])
+#define pppp (&points[15])
+
+ while (1)
+ {
+ double temp_mult;
+
+#define compute(a,b,c,d,point_state) \
+ temp_mult = (unit_pixels / (((a*az) + (b*bz) + (c*cz) + (d*dz) + \
+ (a*aw) + (b*bw) + (c*cw) + (d*dw)) \
+ - observer_z)); \
+ point_state->old_x = point_state->new_x; \
+ point_state->old_y = point_state->new_y; \
+ point_state->new_x = ((((a*ax) + (b*bx) + (c*cx) + (d*dx)) * temp_mult) \
+ + x_offset); \
+ point_state->new_y = ((((a*ay) + (b*by) + (c*cy) + (d*dy)) * temp_mult) \
+ + y_offset); \
+ point_state->same_p = (point_state->old_x == point_state->new_x && \
+ point_state->old_y == point_state->new_y);
+
+ compute (-1, -1, -1, -1, mmmm);
+ compute (-1, -1, -1, 1, mmmp);
+ compute (-1, -1, 1, -1, mmpm);
+ compute (-1, -1, 1, 1, mmpp);
+ compute (-1, 1, -1, -1, mpmm);
+ compute (-1, 1, -1, 1, mpmp);
+ compute (-1, 1, 1, -1, mppm);
+ compute (-1, 1, 1, 1, mppp);
+ compute ( 1, -1, -1, -1, pmmm);
+ compute ( 1, -1, -1, 1, pmmp);
+ compute ( 1, -1, 1, -1, pmpm);
+ compute ( 1, -1, 1, 1, pmpp);
+ compute ( 1, 1, -1, -1, ppmm);
+ compute ( 1, 1, -1, 1, ppmp);
+ compute ( 1, 1, 1, -1, pppm);
+ compute ( 1, 1, 1, 1, pppp);
+
+ move_line (mmmm, mmmp, color0);
+ move_line (mmmm, mmpm, color0);
+ move_line (mmpm, mmpp, color0);
+ move_line (mmmp, mmpp, color0);
+
+ move_line (pmmm, pmmp, color1);
+ move_line (pmmm, pmpm, color1);
+ move_line (pmpm, pmpp, color1);
+ move_line (pmmp, pmpp, color1);
+
+ move_line (mpmm, mpmp, color2);
+ move_line (mpmm, mppm, color2);
+ move_line (mppm, mppp, color2);
+ move_line (mpmp, mppp, color2);
+
+ move_line (mmpp, mppp, color3);
+ move_line (mmpp, pmpp, color3);
+ move_line (pmpp, pppp, color3);
+ move_line (mppp, pppp, color3);
+
+ move_line (mmmm, mpmm, color4);
+ move_line (mmmm, pmmm, color4);
+ move_line (mpmm, ppmm, color4);
+ move_line (pmmm, ppmm, color4);
+
+ move_line (mmmp, mpmp, color5);
+ move_line (mmmp, pmmp, color5);
+ move_line (pmmp, ppmp, color5);
+ move_line (mpmp, ppmp, color5);
+
+ move_line (mmpm, mppm, color6);
+ move_line (mmpm, pmpm, color6);
+ move_line (pmpm, pppm, color6);
+ move_line (mppm, pppm, color6);
+
+ move_line (ppmm, ppmp, color7);
+ move_line (ppmm, pppm, color7);
+ move_line (pppm, pppp, color7);
+ move_line (ppmp, pppp, color7);
+
+ /* If you get error messages about the following forms, and you think you're
+ using an ANSI C conforming compiler, then you're mistaken. Possibly you're
+ mixing an ANSI compiler with a non-ANSI preprocessor, or vice versa.
+ Regardless, your system is broken; it's not a bug in this program.
+ */
+#if defined(__STDC__) || defined(__ANSI_CPP__)
+# define rotate(name,dim0,dim1,cos,sin) \
+ _tmp0_ = ((name##dim0 * cos) + (name##dim1 * sin)); \
+ _tmp1_ = ((name##dim1 * cos) - (name##dim0 * sin)); \
+ name##dim0 = _tmp0_; \
+ name##dim1 = _tmp1_;
+
+# define rotates(dim0,dim1) \
+ if (sin_##dim0##dim1 != 0) { \
+ rotate(a, dim0, dim1, cos_##dim0##dim1, sin_##dim0##dim1); \
+ rotate(b, dim0, dim1, cos_##dim0##dim1, sin_##dim0##dim1); \
+ rotate(c, dim0, dim1, cos_##dim0##dim1, sin_##dim0##dim1); \
+ rotate(d, dim0, dim1, cos_##dim0##dim1, sin_##dim0##dim1); \
+ }
+
+#else /* !__STDC__, courtesy of Andreas Luik <luik@isa.de> */
+# define rotate(name,dim0,dim1,cos,sin) \
+ _tmp0_ = ((name/**/dim0 * cos) + (name/**/dim1 * sin)); \
+ _tmp1_ = ((name/**/dim1 * cos) - (name/**/dim0 * sin)); \
+ name/**/dim0 = _tmp0_; \
+ name/**/dim1 = _tmp1_;
+
+# define rotates(dim0,dim1) \
+ if (sin_/**/dim0/**/dim1 != 0) { \
+ rotate(a,dim0,dim1,cos_/**/dim0/**/dim1,sin_/**/dim0/**/dim1); \
+ rotate(b,dim0,dim1,cos_/**/dim0/**/dim1,sin_/**/dim0/**/dim1); \
+ rotate(c,dim0,dim1,cos_/**/dim0/**/dim1,sin_/**/dim0/**/dim1); \
+ rotate(d,dim0,dim1,cos_/**/dim0/**/dim1,sin_/**/dim0/**/dim1); \
+ }
+#endif /* !__STDC__ */
+
+ rotates (x,y);
+ rotates (x,z);
+ rotates (y,z);
+ rotates (x,w);
+ rotates (y,w);
+ rotates (z,w);
+
+ XSync (dpy, False);
+ screenhack_handle_events (dpy);
+ if (delay) usleep (delay);
+ }
+}
+
+\f
+char *progclass = "Hypercube";
+
+char *defaults [] = {
+ ".background: black",
+ ".foreground: white",
+ "*color0: red",
+ "*color1: orange",
+ "*color2: yellow",
+ "*color3: white",
+ "*color4: green",
+ "*color5: cyan",
+ "*color6: dodgerblue",
+ "*color7: magenta",
+
+ "*xw: 0.000",
+ "*xy: 0.010",
+ "*xz: 0.005",
+ "*yw: 0.010",
+ "*yz: 0.000",
+ "*zw: 0.000",
+
+ "*observer-z: 5",
+ "*delay: 30000",
+ 0
+};
+
+XrmOptionDescRec options [] = {
+ { "-color0", ".color0", XrmoptionSepArg, 0 },
+ { "-color1", ".color1", XrmoptionSepArg, 0 },
+ { "-color2", ".color2", XrmoptionSepArg, 0 },
+ { "-color3", ".color3", XrmoptionSepArg, 0 },
+ { "-color4", ".color4", XrmoptionSepArg, 0 },
+ { "-color5", ".color5", XrmoptionSepArg, 0 },
+ { "-color6", ".color6", XrmoptionSepArg, 0 },
+ { "-color7", ".color7", XrmoptionSepArg, 0 },
+
+ { "-xw", ".xw", XrmoptionSepArg, 0 },
+ { "-xy", ".xy", XrmoptionSepArg, 0 },
+ { "-xz", ".xz", XrmoptionSepArg, 0 },
+ { "-yw", ".yw", XrmoptionSepArg, 0 },
+ { "-yz", ".yz", XrmoptionSepArg, 0 },
+ { "-zw", ".zw", XrmoptionSepArg, 0 },
+
+ { "-observer-z", ".observer-z", XrmoptionSepArg, 0 },
+ { "-delay", ".delay", XrmoptionSepArg, 0 },
+ { 0, 0, 0, 0 }
+};
+
+void
+screenhack (Display *d, Window w)
+{
+ XGCValues gcv;
+ XWindowAttributes xgwa;
+ Colormap cmap;
+ double xy, xz, yz, xw, yw, zw;
+ unsigned long bg;
+
+ dpy = d;
+ window = w;
+ XGetWindowAttributes (dpy, window, &xgwa);
+ cmap = xgwa.colormap;
+
+ x_offset = xgwa.width / 2;
+ y_offset = xgwa.height / 2;
+ unit_pixels = xgwa.width < xgwa.height ? xgwa.width : xgwa.height;
+
+ xy = get_float_resource ("xy", "Float");
+ xz = get_float_resource ("xz", "Float");
+ yz = get_float_resource ("yz", "Float");
+ xw = get_float_resource ("xw", "Float");
+ yw = get_float_resource ("yw", "Float");
+ zw = get_float_resource ("zw", "Float");
+
+ observer_z = get_integer_resource ("observer-z", "Integer");
+
+ delay = get_integer_resource ("delay", "Integer");
+
+ bg = get_pixel_resource ("background", "Background", dpy, cmap);
+
+ if (mono_p)
+ {
+ gcv.function = GXcopy;
+ gcv.foreground = bg;
+ black = XCreateGC (dpy, window, GCForeground|GCFunction, &gcv);
+ gcv.foreground = get_pixel_resource ("foreground", "Foreground",
+ dpy, cmap);
+ color0 = color1 = color2 = color3 = color4 = color5 = color6 = color7 =
+ XCreateGC (dpy, window, GCForeground|GCFunction, &gcv);
+ }
+ else
+ {
+ black = 0;
+ gcv.function = GXxor;
+#define make_gc(color,name) \
+ gcv.foreground = bg ^ get_pixel_resource ((name), "Foreground", \
+ dpy, cmap); \
+ color = XCreateGC (dpy, window, GCForeground|GCFunction, &gcv)
+
+ make_gc (color0,"color0");
+ make_gc (color1,"color1");
+ make_gc (color2,"color2");
+ make_gc (color3,"color3");
+ make_gc (color4,"color4");
+ make_gc (color5,"color5");
+ make_gc (color6,"color6");
+ make_gc (color7,"color7");
+ }
+
+ hyper (xy, xz, yz, xw, yw, zw);
+}
projects / xscreensaver / blobdiff