Enable monsters to move around glass structures if they can see the

player through the walls. Don't use pathfinding to target other
monsters, only the player! Monsters of different intelligence have
different limits on the distance they may travel to circumvent an
obstacle, i.e. zombies will only use a range of 2, whereas highly 
intelligent monsters can expertly find their way through (transparent) 
labyrinths, though there's a chance they'll forget their target if 
they don't see it, so for very long and winding paths it's likely 
they don't ever arrive.

Will probably affect performance, though I did test on entire levels
turned transparent with Vitrification and things seemed to run more
or less smoothly.

Ideally, monsters should also be able to move around other obstacles
that don't affect visibility (such as water, lava, or statues) but
that is currently not possible.


git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@5700 c06c8d41-db1a-0410-9941-cceddc491573

1 files changed, 8 insertions, 0 deletions

diff --git a/crawl-ref/source/tags.cc b/crawl-ref/source/tags.cc
index 77f024c952..caa83181df 100644
--- a/crawl-ref/source/tags.cc
+++ b/crawl-ref/source/tags.cc
@@ -1769,6 +1769,8 @@ static void marshall_monster(writer &th, const monsters &m)
     marshallByte(th, m.target_x);
     marshallByte(th, m.target_y);
     marshallCoord(th, m.patrol_point);
+    int help = m.travel_target;
+    marshallByte(th, help);
 
     // monster pathfinding (TAG_MINOR_PATHFIND)
     marshallShort(th, m.travel_path.size());
@@ -2040,6 +2042,12 @@ static void unmarshall_monster(reader &th, monsters &m)
     if (_tag_minor_version >= TAG_MINOR_MPATROL)
         unmarshallCoord(th, m.patrol_point);
 
+    if (_tag_minor_version >= TAG_MINOR_TRTARGET)
+    {
+        int help = unmarshallByte(th);
+        m.travel_target = static_cast<montravel_target_type>(help);
+    }
+
     if (_tag_minor_version >= TAG_MINOR_PATHFIND)
     {
         const int len = unmarshallShort(th);