Update the compat functions for UP and DOWN distributions.

Their focus is not in the center.  In existing data, all UPs are at the
high end of the range, all DOWNs at the low (shallowest) end, so they can
be thought of as trimmed PEAKs.

1 files changed, 7 insertions, 1 deletions

diff --git a/crawl-ref/source/mon-pick.cc b/crawl-ref/source/mon-pick.cc
index 9b3033223f..d3dd4cc699 100644
--- a/crawl-ref/source/mon-pick.cc
+++ b/crawl-ref/source/mon-pick.cc
@@ -60,7 +60,13 @@ int mons_depth(monster_type mcls, branch_type branch)
     // legacy function, until ZotDef is ported
     for (const pop_entry *pe = population[branch].pop; pe->mons; pe++)
         if (pe->mons == mcls)
+        {
+            if (pe->distrib == UP)
+                return pe->maxr;
+            else if (pe->distrib == DOWN)
+                return pe->minr;
             return (pe->minr + pe->maxr) / 2;
+        }
 
     return DEPTH_NOWHERE;
 }
@@ -78,7 +84,7 @@ int mons_rarity(monster_type mcls, branch_type branch)
             // the square of distance).
             // The new data pretty accurately represents old state, but only
             // if depth is known, and mons_rarity() doesn't receive it.
-            static int fudge[3] = { 25, 12, 0 };
+            static int fudge[5] = { 25, 12, 0, 0, 0 };
             int rare = pe->rarity;
             if (rare < 500)
                 rare = isqrt_ceil(rare * 10);