From d178134a00fc77e4aa9565d93f4e8c43160603cc Mon Sep 17 00:00:00 2001
From: Steve <stephenjsweeney@battleforthesolarsystem.com>
Date: Fri, 1 Apr 2016 14:19:03 +0100
Subject: [PATCH] Allow AI to drop mines.

---
 src/battle/ai.c     | 23 ++++++++++++++++++++++-
 src/battle/ai.h     |  1 +
 src/defs.h          |  1 +
 src/system/lookup.c |  1 +
 4 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/src/battle/ai.c b/src/battle/ai.c
index 329232e..5416d84 100644
--- a/src/battle/ai.c
+++ b/src/battle/ai.c
@@ -52,9 +52,15 @@ static void moveToLeader(void);
 static void wander(void);
 static void doWander(void);
 static int selectWeaponForTarget(Entity *e);
+static void deployMine(void);
 
 void doAI(void)
 {
+	if (self->aiFlags & AIF_DROPS_MINES)
+	{
+		deployMine();
+	}
+	
 	if ((self->aiFlags & (AIF_AVOIDS_COMBAT | AIF_EVADE)) && nearEnemies())
 	{
 		return;
@@ -618,6 +624,21 @@ static int nearEnemies(void)
 	return 0;
 }
 
+static void deployMine(void)
+{
+	Entity *mine;
+	
+	if (!self->reload)
+	{
+		mine = spawnMine();
+		mine->x = self->x;
+		mine->y = self->y;
+		mine->side = self->side;
+		
+		self->reload = FPS + (FPS * (rand() % 5));
+	}
+}
+
 static int nearMines(void)
 {
 	int i, numMines;
@@ -631,7 +652,7 @@ static int nearMines(void)
 	
 	for (i = 0, e = candidates[i] ; e != NULL ; e = candidates[++i])
 	{
-		if (e->type == ET_MINE && getDistance(e->x, e->y, self->x, self->y) < 500)
+		if (e->side != self->side && e->type == ET_MINE && getDistance(e->x, e->y, self->x, self->y) < 500)
 		{
 			self->targetLocation.x += e->x;
 			self->targetLocation.y += e->y;
diff --git a/src/battle/ai.h b/src/battle/ai.h
index 9038b97..628088b 100644
--- a/src/battle/ai.h
+++ b/src/battle/ai.h
@@ -38,6 +38,7 @@ extern void applyFighterBrakes(void);
 extern void addHudMessage(SDL_Color c, char *format, ...);
 extern Entity **getAllEntsWithin(int x, int y, int w, int h, Entity *ignore);
 extern char *getTranslatedString(char *string);
+extern Entity *spawnMine(void);
 
 extern Battle battle;
 extern Colors colors;
diff --git a/src/defs.h b/src/defs.h
index 605874b..cc7d658 100644
--- a/src/defs.h
+++ b/src/defs.h
@@ -118,6 +118,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 #define AIF_WANDERS				(2 << 14)
 #define AIF_COVERS_RETREAT		(2 << 15)
 #define AIF_TARGET_FOCUS		(2 << 16)
+#define AIF_DROPS_MINES			(2 << 17)
 
 /* player abilities */
 #define BOOST_RECHARGE_TIME 	(FPS * 7)
diff --git a/src/system/lookup.c b/src/system/lookup.c
index 0bf0e78..964129d 100644
--- a/src/system/lookup.c
+++ b/src/system/lookup.c
@@ -81,6 +81,7 @@ void initLookups(void)
 	addLookup("AIF_WANDERS", AIF_WANDERS);
 	addLookup("AIF_COVERS_RETREAT", AIF_COVERS_RETREAT);
 	addLookup("AIF_TARGET_FOCUS", AIF_TARGET_FOCUS);
+	addLookup("AIF_DROPS_MINES", AIF_DROPS_MINES);
 
 	addLookup("DT_ANY", DT_ANY);
 	addLookup("DT_NO_SPIN", DT_NO_SPIN);