From: simon <simon@cda61777-01e9-0310-a592-d414129be87e>
Date: Sun, 22 Jan 2012 15:52:14 +0000 (+0000)
Subject: Trivial and silly patch to allow users to configure the Signpost
X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/puzzles/commitdiff_plain/148fdedfa2dec25cbef6359cdd88bef3efeac50b?hp=707f5886977fb0a7518256d6a9970a2efeb79265

Trivial and silly patch to allow users to configure the Signpost
victory roll so that adjacent arrows rotate in opposite directions,
giving the impression that they're an interlocking field of gears.
Possibly even more brain-twisting than the original version :-)


git-svn-id: svn://svn.tartarus.org/sgt/puzzles@9384 cda61777-01e9-0310-a592-d414129be87e
---

diff --git a/signpost.c b/signpost.c
index 19649b2..5286b42 100644
--- a/signpost.c
+++ b/signpost.c
@@ -2094,11 +2094,33 @@ static void game_redraw(drawing *dr, game_drawstate *ds, game_state *oldstate,
             if (state->nums[i] != ds->nums[i] ||
                 f != ds->f[i] || dirp != ds->dirp[i] ||
                 force || !ds->started) {
+                int sign;
+                {
+                    /*
+                     * Trivial and foolish configurable option done on
+                     * purest whim. With this option enabled, the
+                     * victory flash is done by rotating each square
+                     * in the opposite direction from its immediate
+                     * neighbours, so that they behave like a field of
+                     * interlocking gears. With it disabled, they all
+                     * rotate in the same direction. Choose for
+                     * yourself which is more brain-twisting :-)
+                     */
+                    static int gear_mode = -1;
+                    if (gear_mode < 0) {
+                        char *env = getenv("SIGNPOST_GEARS");
+                        gear_mode = (env && (env[0] == 'y' || env[0] == 'Y'));
+                    }
+                    if (gear_mode)
+                        sign = 1 - 2 * ((x ^ y) & 1);
+                    else
+                        sign = 1;
+                }
                 tile_redraw(dr, ds,
                             BORDER + x * TILE_SIZE,
                             BORDER + y * TILE_SIZE,
                             state->dirs[i], dirp, state->nums[i], f,
-                            angle_offset, -1);
+                            sign * angle_offset, -1);
                 ds->nums[i] = state->nums[i];
                 ds->f[i] = f;
                 ds->dirp[i] = dirp;