Replace TSO's Smiting with Divine Shield.

Actually, I wasn't entirely sure which of the many attack
invocations to replace and I chose Smiting mostly because
of the new overlap with Zin and because such a change is
easiest to revert (copy code from Zin). :p

Divine Shield strengthens existing shields (also magical,
which might have to be excluded) or else creates a new
magical one. Either way, the shields value is increased by
  3 + skills(SHIELDS)/5
and this bonus lasts for 
  5 + (skills(SHIELS) + 2*skills(INVOCATIONS))/6
turns, after which it is decreased by 1 every two out of
three turns until it reaches 0.


git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@3225 c06c8d41-db1a-0410-9941-cceddc491573

1 files changed, 19 insertions, 0 deletions

diff --git a/crawl-ref/source/acr.cc b/crawl-ref/source/acr.cc
index 0bad5ecd37..89e6d0aad1 100644
--- a/crawl-ref/source/acr.cc
+++ b/crawl-ref/source/acr.cc
@@ -2410,6 +2410,25 @@ static void decrement_durations()
         you.duration[DUR_PRAYER] = 0;
     }
 
+    if (you.duration[DUR_DIVINE_SHIELD])
+    {
+        if (you.duration[DUR_DIVINE_SHIELD] > 1)
+        {
+            if (--you.duration[DUR_DIVINE_SHIELD] == 1)
+                mpr("Your divine shield starts to fade.");
+        }
+        
+        if (you.duration[DUR_DIVINE_SHIELD] == 1 && !one_chance_in(3))
+        {
+            you.redraw_armour_class = true;
+            if (--you.attribute[ATTR_DIVINE_SHIELD] == 0)
+            {
+                you.duration[DUR_DIVINE_SHIELD] = 0;
+                mpr("Your divine shield fades completely.");
+            }
+        }
+    }
+    
     //jmf: more flexible weapon branding code
     if (you.duration[DUR_WEAPON_BRAND] > 1)
         you.duration[DUR_WEAPON_BRAND]--;