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, 10 insertions, 0 deletions

diff --git a/crawl-ref/source/player.cc b/crawl-ref/source/player.cc
index 724ccfa21c..fe79c5dff7 100644
--- a/crawl-ref/source/player.cc
+++ b/crawl-ref/source/player.cc
@@ -5250,3 +5250,13 @@ void player::sicken(int amount)
     disease = (tmp > 210) ? 210 : tmp;
     learned_something_new(TUT_YOU_SICK);    
 }
+
+bool player::can_see_invisible() const
+{
+    return (player_see_invis() > 0);
+}
+
+bool player::invisible() const
+{
+    return (invis);
+}