'fix' #H4295 - weapon shattering

When hero with two-handed weapon, or samurai with katana and without
shield, hits a monster which is wielding a weapon, there is a chance
for defender's weapon to be destroyed via shattering.  The chance is
reduced--by increasing the chance to resist--if the hero's weapon is
rusty or otherwise eroded.  That works as intended.  This changes
things to make the chance be increased--by reducing the chance to
resist--if defender's weapon is rusty or otherwise eroded.

diff --git a/src/uhitm.c b/src/uhitm.c
index 1b3bb84eae018740313a1ea48b4a4c804f5e4068..48a16883f3ab8c5d34651cc281535f9c0da74ce6 100644 (file)
--- a/src/uhitm.c
+++ b/src/uhitm.c
@@ -1,4 +1,4 @@
-/* NetHack 3.6 uhitm.c $NHDT-Date: 1456992470 2016/03/03 08:07:50 $  $NHDT-Branch: NetHack-3.6.0 $:$NHDT-Revision: 1.155 $ */
+/* NetHack 3.6 uhitm.c $NHDT-Date: 1460103141 2016/04/08 08:12:21 $  $NHDT-Branch: NetHack-3.6.0 $:$NHDT-Revision: 1.156 $ */
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -662,15 +662,19 @@ int thrown; /* HMON_xxx (0 => hand-to-hand, other => ranged) */
                                && P_SKILL(wtype) >= P_SKILLED)
                            && ((monwep = MON_WEP(mon)) != 0
                                && !is_flimsy(monwep)
-                               && !obj_resists(
-                                      monwep, 50 + 15 * greatest_erosion(obj),
-                                      100))) {
+                               && !obj_resists(monwep,
+                                       50 + 15 * (greatest_erosion(obj)
+                                                  - greatest_erosion(monwep)),
+                                               100))) {
                     /*
                      * 2.5% chance of shattering defender's weapon when
                      * using a two-handed weapon; less if uwep is rusted.
                      * [dieroll == 2 is most successful non-beheading or
                      * -bisecting hit, in case of special artifact damage;
                      * the percentage chance is (1/20)*(50/100).]
+                     * If attacker's weapon is rustier than defender's,
+                     * the obj_resists chance is increased so the shatter
+                     * chance is decreased; if less rusty, then vice versa.
                      */
                     setmnotwielded(mon, monwep);
                     mon->weapon_check = NEED_WEAPON;