Randomize the destination of hatches and shafts (#3200).

Hatch destination is randomly chosen on level generation and is saved in a
map marker, so it's always the same. We don't bother using a marker for
shafts since they are single use.
Items falling through shafts have no reason to end up on the same
coordinates since they can even end up on a different level, so their
destination is randomised too.

1 files changed, 16 insertions, 0 deletions

diff --git a/crawl-ref/source/mapmark.h b/crawl-ref/source/mapmark.h
index 3f699817a7..384c54bcdf 100644
--- a/crawl-ref/source/mapmark.h
+++ b/crawl-ref/source/mapmark.h
@@ -225,4 +225,20 @@ public:
     std::map<std::string, std::string> properties;
 };
 
+class map_position_marker : public map_marker
+{
+public:
+    map_position_marker(const coord_def &pos = coord_def(0, 0),
+                        const coord_def _dest = INVALID_COORD);
+    map_position_marker(const map_position_marker &other);
+    void write(writer &) const;
+    void read(reader &);
+    std::string debug_describe() const;
+    map_marker *clone() const;
+    static map_marker *read(reader &, map_marker_type);
+
+public:
+    coord_def dest;
+};
+
 #endif