Cleave effect for Axes.

* Additional targets are acquired by rotating from the main target in both
  directions but no more than 3 cells. Solid features block cleaving. On
  open grounds, it attacks 7 cells (all but the opposite one from the main
  target).
  A single wall on the side can block one or two targets since it doesn't go
  all around.
* Additional attacks do 75% damage. Main target still takes full damage.
* Allies don't block cleaving and are not harmed by it unless attacker
  is confused.
* Monsters wielding axes get cleaving too.
* Broad axe, battleaxe and executioner's axe base damage is reduced by 1.
  More nerfing might be needed for the latter 2.
* Cleaving works when attacking empty spaces (useful against invisible
  monsters)
* Monsters dual wielding axes should work.

Thanks to LexAckson for helping with this implementation
(especially rotate_adjacent).

1 files changed, 7 insertions, 0 deletions

diff --git a/crawl-ref/source/fight.h b/crawl-ref/source/fight.h
index 88e2dfea1f..03078d001d 100644
--- a/crawl-ref/source/fight.h
+++ b/crawl-ref/source/fight.h
@@ -6,6 +6,8 @@
 #ifndef FIGHT_H
 #define FIGHT_H
 
+#include <list>
+
 #include "melee_attack.h"
 #include "mon-enum.h"
 #include "random-var.h"
@@ -43,5 +45,10 @@ unchivalric_attack_type is_unchivalric_attack(const actor *attacker,
 void chaos_affect_actor(actor *victim);
 int player_weapon_str_weight();
 int player_weapon_dex_weight();
+void get_cleave_targets(coord_def atk, coord_def def, int dir,
+                        list<actor*> &targets);
+void attack_cleave_targets(actor* attacker, list<actor*> &targets,
+                           int attack_number = 0,
+                           int effective_attack_number = 0);
 
 #endif