Implemented Erik's invisibility proposal:

- M_SENSE_INVIS for perceptive monsters; split existing monsters with see
  invisible into M_SEE_INVIS and M_SENSE_INVIS.
- Monsters that can't see invisible get to-hit penalties vs invisible players 
  and monsters in both melee and at range.
- Monsters that sense where you are know where to shoot and attack, but still
  get to-hit penalties because they don't know exactly where you are.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@1260 c06c8d41-db1a-0410-9941-cceddc491573

1 files changed, 2 insertions, 2 deletions

diff --git a/crawl-ref/source/mon-util.h b/crawl-ref/source/mon-util.h
index 1317bf983a..df1add3afb 100644
--- a/crawl-ref/source/mon-util.h
+++ b/crawl-ref/source/mon-util.h
@@ -156,8 +156,8 @@ char mons_itemuse(int mc);
 /* ***********************************************************************
  * called from: beam - fight - monstuff - view
  * *********************************************************************** */
-char mons_see_invis( struct monsters *mon );
-
+bool mons_see_invis(const monsters *mon);
+bool mons_sense_invis(const monsters *mon);
 bool mons_monster_visible( struct monsters *mon, struct monsters *targ );
 bool mons_player_visible( struct monsters *mon );