Add a general halo interface to actor.

Also convert the TSO halo to use this. actor::haloed() is still
specific to the player TSO halo.

1 files changed, 34 insertions, 0 deletions

diff --git a/crawl-ref/source/halo.cc b/crawl-ref/source/halo.cc
new file mode 100644
index 0000000000..555df0048b
--- /dev/null
+++ b/crawl-ref/source/halo.cc
@@ -0,0 +1,34 @@
+#include "AppHdr.h"
+
+#include "actor.h"
+#include "player.h"
+#include "monster.h"
+#include "religion.h"
+
+// TODO: generalize.
+bool actor::haloed() const
+{
+    return (you.inside_halo(pos()));
+}
+
+bool actor::inside_halo(const coord_def &c) const
+{
+    int r = halo_radius();
+    return ((c - pos()).abs() <= r * r && see_cell(c));
+}
+
+int player::halo_radius() const
+{
+    if (you.religion == GOD_SHINING_ONE && you.piety >= piety_breakpoint(0)
+        && !you.penance[GOD_SHINING_ONE])
+    {
+        return std::min(LOS_RADIUS, you.piety / 20);
+    }
+
+    return 0;
+}
+
+int monsters::halo_radius() const
+{
+    return 0;
+}