1 files changed, 49 insertions, 0 deletions
diff --git a/crawl-ref/source/actor-los.cc b/crawl-ref/source/actor-los.cc
new file mode 100644
index 0000000000..85e66fd8ab
--- /dev/null
+++ b/crawl-ref/source/actor-los.cc
@@ -0,0 +1,49 @@
+#include "AppHdr.h"
+
+#include "actor.h"
+#include "player.h"
+#include "monster.h"
+#include "state.h"
+
+bool actor::observable() const
+{
+    return (crawl_state.arena || this == &you || you.can_see(this));
+}
+
+bool actor::see_cell(const coord_def &p) const
+{
+    return (los.see_cell(p));
+}
+
+void actor::update_los()
+{
+    los.update();
+}
+
+bool actor::can_see(const actor *target) const
+{
+    return (target->visible_to(this) && see_cell(target->pos()));
+}
+
+bool player::see_cell_no_trans(const coord_def &p) const
+{
+    return (los_no_trans.see_cell(p));
+}
+
+const los_def& actor::get_los_no_trans()
+{
+    return (los_no_trans);
+}
+
+const los_def& monsters::get_los_no_trans()
+{
+    los_no_trans.update();
+    return (los_no_trans);
+}
+
+void player::update_los()
+{
+    los_no_trans.update();
+    actor::update_los();
+}
+