Add some Follow stuff to lua

You can also disallow following code from allowing the NPC to run if
they're far enough away

zone/lua_npc.cpp

@@ -333,6 +333,21 @@ void Lua_NPC::AI_SetRoambox(float dist, float max_x, float min_x, float max_y, f
 	self->AI_SetRoambox(dist, max_x, min_x, max_y, min_y, delay, mindelay);
 }
 
+void Lua_NPC::SetFollowID(int id) {
+	Lua_Safe_Call_Void();
+	self->SetFollowID(id);
+}
+
+void Lua_NPC::SetFollowDistance(int dist) {
+	Lua_Safe_Call_Void();
+	self->SetFollowDistance(dist);
+}
+
+void Lua_NPC::SetFollowCanRun(bool v) {
+	Lua_Safe_Call_Void();
+	self->SetFollowCanRun(v);
+}
+
 int Lua_NPC::GetNPCSpellsID() {
 	Lua_Safe_Call_Int();
 	return self->GetNPCSpellsID();
@@ -572,6 +587,9 @@ luabind::scope lua_register_npc() {
 		.def("IsGuarding", (bool(Lua_NPC::*)(void))&Lua_NPC::IsGuarding)
 		.def("AI_SetRoambox", (void(Lua_NPC::*)(float,float,float,float,float))&Lua_NPC::AI_SetRoambox)
 		.def("AI_SetRoambox", (void(Lua_NPC::*)(float,float,float,float,float,uint32,uint32))&Lua_NPC::AI_SetRoambox)
+		.def("SetFollowID", (void(Lua_NPC::*)(int))&Lua_NPC::SetFollowID)
+		.def("SetFollowDistance", (void(Lua_NPC::*)(int))&Lua_NPC::SetFollowDistance)
+		.def("SetFollowCanRun", (void(Lua_NPC::*)(bool))&Lua_NPC::SetFollowCanRun)
 		.def("GetNPCSpellsID", (int(Lua_NPC::*)(void))&Lua_NPC::GetNPCSpellsID)
 		.def("GetSpawnPointID", (int(Lua_NPC::*)(void))&Lua_NPC::GetSpawnPointID)
 		.def("GetSpawnPointX", (float(Lua_NPC::*)(void))&Lua_NPC::GetSpawnPointX)

zone/lua_npc.h

@@ -92,6 +92,9 @@ public:
 	bool IsGuarding();
 	void AI_SetRoambox(float dist, float max_x, float min_x, float max_y, float min_y);
 	void AI_SetRoambox(float dist, float max_x, float min_x, float max_y, float min_y, uint32 delay, uint32 mindelay);
+	void SetFollowID(int id);
+	void SetFollowDistance(int dist);
+	void SetFollowCanRun(bool v);
 	int GetNPCSpellsID();
 	int GetSpawnPointID();
 	float GetSpawnPointX();

zone/mob.cpp

@@ -383,8 +383,9 @@ Mob::Mob(const char* in_name,
 	m_CurrentWayPoint = glm::vec4();
 	cur_wp_pause = 0;
 	patrol = 0;
-	follow = 0;
+	follow_id = 0;
 	follow_dist = 100;	// Default Distance for Follow
+	follow_run = true;	// We can run if distance great enough
 	no_target_hotkey = false;
 	flee_mode = false;
 	currently_fleeing = false;

zone/mob.h

@@ -695,10 +695,12 @@ public:
 	virtual bool IsAttackAllowed(Mob *target, bool isSpellAttack = false);
 	bool IsTargeted() const { return (targeted > 0); }
 	inline void IsTargeted(int in_tar) { targeted += in_tar; if(targeted < 0) targeted = 0;}
-	void SetFollowID(uint32 id) { follow = id; }
+	void SetFollowID(uint32 id) { follow_id = id; }
 	void SetFollowDistance(uint32 dist) { follow_dist = dist; }
-	uint32 GetFollowID() const { return follow; }
+	void SetFollowCanRun(bool v) { follow_run = v; }
+	uint32 GetFollowID() const { return follow_id; }
 	uint32 GetFollowDistance() const { return follow_dist; }
+	bool GetFollowCanRun() const { return follow_run; }
 	inline bool IsRareSpawn() const { return rare_spawn; }
 	inline void SetRareSpawn(bool in) { rare_spawn = in; }
 
@@ -1235,8 +1237,9 @@ protected:
 	uint16 ownerid;
 	PetType typeofpet;
 	int16 petpower;
-	uint32 follow;
+	uint32 follow_id;
 	uint32 follow_dist;
+	bool follow_run;
 	bool no_target_hotkey;
 	bool rare_spawn;
 

zone/mob_ai.cpp

@@ -1647,7 +1647,8 @@ void Mob::AI_Process() {
 					if (distance >= follow_distance) {
 						int speed = GetWalkspeed();
 
-						if (distance >= follow_distance + 150) {
+						// maybe we want the NPC to only walk doing follow logic
+						if (GetFollowCanRun() && distance >= follow_distance + 150) {
 							speed = GetRunspeed();
 						}