From 178153c82b392b4f5a990ec318ebd44cb28ddeaf Mon Sep 17 00:00:00 2001
From: Cong <congusbongus@gmail.com>
Date: Tue, 16 May 2017 00:06:07 +1000
Subject: [PATCH] Positional battle audio

---
 src/system/sound.c | 10 +++++++++-
 src/system/sound.h |  2 ++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/system/sound.c b/src/system/sound.c
index ed2727f..a2ed592 100644
--- a/src/system/sound.c
+++ b/src/system/sound.c
@@ -99,7 +99,15 @@ void playBattleSound(int id, int x, int y)
 			vol /= MAX_BATTLE_SOUND_DISTANCE;
 			vol *= distance;
 
-			Mix_SetDistance(channel, vol);
+			if (distance >= MIN_BATTLE_SOUND_DISTANCE)
+			{
+				float bearing = 360 - getAngle(x, y, lastPlayerX, lastPlayerY);
+				Mix_SetPosition(channel, (Sint16)bearing, (Uint8)distance);
+			}
+			else
+			{
+				Mix_SetDistance(channel, vol);
+			}
 		}
 	}
 }
diff --git a/src/system/sound.h b/src/system/sound.h
index f6b911f..9e6f6c6 100644
--- a/src/system/sound.h
+++ b/src/system/sound.h
@@ -23,8 +23,10 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 #include "SDL2/SDL_mixer.h"
 
 #define MAX_BATTLE_SOUND_DISTANCE	1500
+#define MIN_BATTLE_SOUND_DISTANCE	100
 
 extern int getDistance(int x1, int y1, int x2, int y2);
+extern float getAngle(int x1, int y1, int x2, int y2);
 extern char *getFileLocation(char *filename);
 
 extern Entity *player;