Diversify patrol behaviour for monsters of different intelligence.

* I_NORMAL, I_HIGH: as before
* I_ANIMAL: try to only move within LOS of the patrol point
* I_INSECT: as animal, but patrol radius is 5
* I_PLANT : patrol radius is also 5, but there are some other
            differences: 

If the patrol point gets out of sight, zombies don't even attempt to 
get back. Instead they become confused (not literally, though) and 
reset their patrol point to 0 (if hostile, thus stop patrolling) or 
to their current position (to continue "waiting" if friendly). 
Also, while patrolling, if they reach their target there's a 50% 
chance of not moving this turn, and 50% the next turn, etc. 
Especially the latter needs testing. If it looks *too* stupid even
for zombies I'll take it out again.

These changes should also help to make patrolling a bit more
efficient because for stupid monsters we have:
 - one los calculation instead of two (patrol point, monster)
 - smaller radius
 - no calculation at all if success is unlikely (distance check)


git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@5335 c06c8d41-db1a-0410-9941-cceddc491573

1 files changed, 4 insertions, 0 deletions

diff --git a/crawl-ref/source/view.h b/crawl-ref/source/view.h
index 9994707b12..b2251d13cf 100644
--- a/crawl-ref/source/view.h
+++ b/crawl-ref/source/view.h
@@ -256,6 +256,7 @@ public:
     // public methods
     void set_monster(monsters *mon);
     void set_los_centre(int x, int y);
+    void set_los_range(int r);
     void fill_los_field(void);
     bool in_sight(int x, int y);
 
@@ -287,6 +288,9 @@ protected:
     // Else, any monster trying to move around within this los field.
     monsters *mons;
 
+    // Range may never be greater than LOS_RADIUS!
+    int range;
+
     // The array to store the LOS values.
     int los_field[LSIZE][LSIZE];
 };