field.qc

#include "defs.qh"
#include "menu.qh"
/*=======================================================//
// field.QC - CustomTF 3.2.OfN			   - 30/1/2001 - //
// by Sergio Fumaña Grunwaldt - OfteN aka superCOCK2000  //
=========================================================//
 Field generator stuff - Written all by myself! :)
 I took the model and some sounds from deadlode mod
 One sound is from megaTF
=========================================================*/

// field generator flags, DO NOT MODIFY

#define FIELDGEN_ISOFF		0 // no field, not linked, and its not trying to link (several possible reasons)
#define FIELDGEN_ISIDLE		1 // no field, not linked, trying to link with other generator
#define FIELDGEN_ISDISABLED 2 // no field, linked, its disabled temporary (teammate passing thru field)
#define FIELDGEN_ISENABLED	3 // field, linked, and cells enough, waiting for shock, only hum sound
#define FIELDGEN_ISWORKING	4 // field, linked, glowing and all the field visual/sound effects are on

// field generator settings

#define FIELDGEN_SHOCKTIME		3	// seconds the generators remains glowing and doing lightning after a shock
#define FIELDGEN_LINKTIME		3.5 // seconds between tries to link with other generator
#define FIELDGEN_TIMEDISABLED	1.5	// was 3 // then 2
#define FIELDGEN_CELLSCOST		2	// cells cost for each "FIELDGEN_ISWORKING" pass
#define FIELDGEN_DMG			80	// normal damag when touching
#define FIELDGEN_DMGINSIDE		120 // damage when trapped inside field
#define FIELDGEN_MAXZ			10

/*===============================================================================================

EXPLANATION OF HOW THE ENTITY FIELDS ARE USED ( thnx? np.. =) )
---------------------------------------------

For field generator entity:
---------------------------

.fieldgen_status - Holds current status of every field generator, FIELDGEN_XXXX determines
.fieldgen_hasfield - Boolean value, determines if field generator is currently supporting a force field
.fieldgen_field  - This points to the force field, if none its always 'nil'
.no_grenades_1	 - Controls delay between tries to link (only affects sound currently, it tries to link every frame)
.no_grenades_1	 - Controls delay for field to go up again after beeing disabled
.tp_grenades_1	 - Controls delay of the WORKING status
.has_teleporter  - Used to flash generators when field is activated
.has_camera		 - Controls delay between cells take
.has_tesla		 - Boolean, forced status.

For force field entity:
-----------------------

.demon_one		- Points to the first field generator
.demon_two		- Points to the 2nd generator
.fieldgen_status	   - Hum sound running, boolean
.fieldgen_hasfield	   - Shield sound running, boolean
.has_tesla		- Controls delay between hums
.has_sentry		- Controls delay between shield sounds
.dmg			- Next damage the field will do
.has_camera		- Used to control the rate at which the field touch sound/visual effects are done (4hz)
.forcefield_offset	   - Offset to one of the gens from origin, used for lightning effects

================================================================================================*/

void() CheckDistance;
entity(entity fieldgen) Find_OtherGen;
float(entity fieldgen1, entity fieldgen2) FieldGens_CanLink;
float(entity fieldgen) FieldGen_CanIdle;
float(entity field) IsValidFieldGen;
float (vector targ, vector check) vis2orig;
float(entity field) IsValidField;
void(entity tfield, entity gen1) Field_UpdateSounds;
void(entity tfield) Field_MakeVisual;
float(entity tfield) FieldIsImproved;
float(entity tfield) FieldIsMalfunctioning;
void() Field_touch;
void() Field_touch_SUB;
float(entity e1, entity e2) EntsTouching2;
void(entity tfield, vector where, entity thing) FieldExplosion;
float(entity tfield, entity who) Field_ItCanPass;
float(entity tfield, entity who) Field_ShouldDamage;

#ifdef FIELD_FORCEMODE

entity(entity myself) GetMyFieldGen;
float(entity tfield) Field_GetForcedStatus;
void(float value) SetFieldForcedStatus; // player function (self = player) cuts disabled time also
float() GetFieldForcedStatus; // player

#endif

//=========================================================================================
// field generator model and sounds

void() Field_Precache =
{
	precache_sound ("misc/null.wav");
	precache_sound2("misc/ffhum.wav");
	precache_sound2("misc/ffbeep.wav");
	precache_sound2("misc/ffield.wav");
	precache_sound2("misc/ffact.wav");
	precache_sound2("misc/fffail.wav");
	precache_model2("progs/ffgen2.mdl");
};

//================================================================================================
// checks for field generators and removes itself if needed, checks for stuck entities on field 

void() Field_think =
{
	if (self.classname != "force_field")
	{
		RPrint("BUG: Not a force field entity was in 'FieldThink()'!\n");
		return;
	}

	self.has_camera = FALSE;

	// checks for removal...
	if (!IsValidFieldGen(self.demon_one) || !IsValidFieldGen(self.demon_two))
	{
		if (IsValidFieldGen(self.demon_one))
		{
			self.demon_one.fieldgen_hasfield = FALSE;
			self.demon_one.fieldgen_field = nil;
		}

		if (IsValidFieldGen(self.demon_two))
		{
			self.demon_two.fieldgen_hasfield = FALSE;
			self.demon_two.fieldgen_field = nil;
		}

		self.demon_one = nil;
		self.demon_two = nil;
		
		dremove(self);

		RPrint("Debug: Field entity removed in Field_think()\n"); //shouldnt happen
	}
	else
		self.nextthink = time + 0.25; // 4hz check

	if (IsValidFieldGen(self.demon_one))
	if (self.demon_one.fieldgen_status == FIELDGEN_ISWORKING)
		Field_MakeVisual(self);		   

	// checks for anything stuck in field :)
	local entity te;
	local float frange;

	frange = FIELDGEN_RANGE;

	if (FieldIsImproved(self) & IMPROVED_FOUR)
		frange = FIELDGEN_HACKEDRANGE;

	te = findradius(self.origin,frange);
	while (te)
	{
		if (te != self)
		if (te != self.demon_one)
		if (te != self.demon_two)
		if (te.velocity == '0 0 0')
//		if (!IsBuilding(te)) // no screwing with the buildings :)
		if (te.classname != "force_field")
		if (EntsTouching2(te,self))
		{
			other = te;
			deathmsg = DMSG_STUCK_FORCEFIELD; 
			self.dmg = FIELDGEN_DMGINSIDE; // this gonna hurt
			Field_touch_SUB();
		}
		te = te.chain;
	}
};

//=============================================================================================
// is one entity actually inside the other one? (this avoids using a stupid trigger)

float(entity e1, entity e2) EntsTouching2 =
{
	if (hullpointcontents (e2, e1.mins, e1.maxs, e1.origin) != CONTENTS_SOLID)
		return FALSE;
	return TRUE;
};

//=================================================================================
// these 2 functions return the current hacks that should apply to the field

float(entity tfield) FieldIsImproved =
{
	if (IsValidFieldGen(tfield.demon_one) && IsValidFieldGen(tfield.demon_two))
		return tfield.demon_one.num_mines | tfield.demon_two.num_mines;

	if (IsValidFieldGen(tfield.demon_one))
		return tfield.demon_one.num_mines;

	if (IsValidFieldGen(tfield.demon_two))
		return tfield.demon_two.num_mines;

	return 0;
};

float(entity tfield) FieldIsMalfunctioning =
{
	if (IsValidFieldGen(tfield.demon_one) && IsValidFieldGen(tfield.demon_two))
		return tfield.demon_one.is_malfunctioning | tfield.demon_two.is_malfunctioning;

	if (IsValidFieldGen(tfield.demon_one))
		return tfield.demon_one.is_malfunctioning;

	if (IsValidFieldGen(tfield.demon_two))
		return tfield.demon_two.is_malfunctioning;

	return 0;
};

//=================================================================
// self is the field, disables it

void() DisableField =
{
	if (IsValidFieldGen(self.demon_one))
	{
		self.demon_one.fieldgen_status = FIELDGEN_ISDISABLED;
		self.demon_one.no_grenades_2 = time + FIELDGEN_TIMEDISABLED;			
	}
			
	if (IsValidFieldGen(self.demon_two))
	{
		self.demon_two.fieldgen_status = FIELDGEN_ISDISABLED;
		self.demon_two.no_grenades_2 = time + FIELDGEN_TIMEDISABLED;
	}

	sound (self, CHAN_VOICE, "misc/ffbeep.wav", 0.4, ATTN_IDLE);
};

//=========================================================================================
// applies damage and makes the sound and visual effect for the forcefield shock

void() Field_touch_SUB =
{
	local float doFX;
	local float shoulddamage;
	doFX = TRUE;

	if (FieldIsMalfunctioning(self) & SCREWUP_THREE) // reduce output
		self.dmg = 1;

	if (other.classname == "player") // PLAYERS
	{
		//dprint (vtos (other.origin) + "\n");
		if (other.playerclass == PC_UNDEFINED) // Observers
			return;
		
		if (Field_ItCanPass(self, other))  
		{
			DisableField();						   
			return;
		}
		else
		{
			self.velocity = self.velocity - (self.velocity*4) + '0 0 1';

			shoulddamage = Field_ShouldDamage(self,other);
			if (shoulddamage == 1)
				TF_T_Damage (other, self, self.real_owner, self.dmg, TF_TD_NOTTEAM, TF_TD_ELECTRICITY);
			else if (shoulddamage == 2) // hacked to hurt teammates
			{
				if (deathmsg == DMSG_FORCEFIELD)
					deathmsg = DMSG_FF_HACKED;
				else /* if (deathmsg == DMSG_FORCEFIELD_STUCK) */
					deathmsg = DMSG_FF_STUCK_HACKED;
				TF_T_Damage (other, self, self.martyr_enemy, self.dmg, TF_TD_NOTTEAM, TF_TD_ELECTRICITY);
			}
			if (shoulddamage)
				self.demon_one.has_camera = self.demon_two.has_camera = 0;
		}

	}
	else if (other.classname != "force_field") // non player entities
	{
		if (IsMonster(other))
		{
			if (Field_ItCanPass(self, other))
			{
				DisableField();
				return;
			}
			else
			{
				shoulddamage = Field_ShouldDamage(self,other);
				if (shoulddamage == 1)
					TF_T_Damage (other, self, self.real_owner, self.dmg, TF_TD_NOTTEAM, TF_TD_ELECTRICITY);
				else if (shoulddamage == 2) // hacked to hurt teammates
				{
					if (deathmsg == DMSG_FORCEFIELD)
						deathmsg = DMSG_FF_HACKED;
					else /* if (deathmsg == DMSG_FORCEFIELD_STUCK) */
						deathmsg = DMSG_FF_STUCK_HACKED;
					TF_T_Damage (other, self, self.martyr_enemy, self.dmg, TF_TD_NOTTEAM, TF_TD_ELECTRICITY);
				}
			}
		}
		

	}

	if(other.movetype != MOVETYPE_NONE && other.movetype != MOVETYPE_PUSH && other.movetype != MOVETYPE_BOUNCE && other.movetype != MOVETYPE_BOUNCEMISSILE)
	{
		checkmove(other.origin, other.mins, other.maxs, other.origin + '0 0 1', MOVE_NORMAL, other);

		if (trace_fraction == 1)
		{
			local vector forward = crossproduct(normalize(self.demon_one.origin - self.demon_two.origin), '0 0 1');
			
			if (crossproduct (normalize(self.origin - other.origin), normalize(self.demon_one.origin -self.demon_two.origin))
				* '0 0 1' > 0)
				other.velocity = -300 * forward;
			else
				other.velocity = 300 * forward;			

			other.velocity.z += 50;

			setorigin(other, other.origin + '0 0 1');
		}

		else if (IsBuilding(other))
		{
			sprint(other.real_owner, PRINT_HIGH, "The forcefield short-circuits your structure\n");
			TF_T_Damage(other, nil, nil, 9999, TF_TD_IGNOREARMOUR, 0);
		}
	}

	FieldExplosion(self,other.origin,other);
	PutFieldWork(self);

};

#ifdef FIELD_FORCEMODE

//==========================================================================
// gets one of our field generators

entity(entity myself) GetMyFieldGen =
{
	local entity te;
	local float foundit;
	te = nil;
	foundit = FALSE;

	te = find(nil, classname, "building_fieldgen");
	while (te && foundit == FALSE)
	{
		if (te.real_owner == myself) // is it ours?
			foundit = TRUE; // yeah, found it
		
		if (foundit == FALSE) // our search must continue...
			te = find(te, classname, "building_fieldgen");
	}

	return te;
};


//=========================================================================
// these functions retrieve and set the current 'forced status' on a field

float(entity tfield) Field_GetForcedStatus =
{
	if (IsValidFieldGen(tfield.demon_one) && IsValidFieldGen(tfield.demon_two))
	{
		if (tfield.demon_two.has_tesla || tfield.demon_one.has_tesla)
			return TRUE;
	}
	else if (IsValidFieldGen(tfield.demon_one))
	{
		if (tfield.demon_one.has_tesla)
			return TRUE;
	}
	else if (IsValidFieldGen(tfield.demon_two))
	{
		if (tfield.demon_two.has_tesla)
			return TRUE;
	}

	return FALSE;
};

//==============================================================================
// player functions called on menu.qc to disable/enable forced status on field

void(float value) SetFieldForcedStatus =
{
	local entity gen1, gen2;
	gen1 = GetMyFieldGen(self);
	gen2 = Find_OtherGen(gen1);

	if (IsValidFieldGen(gen1))
	{
		gen1.has_tesla = value;
		if (value)
			gen1.no_grenades_2 = time;
	}

	if (IsValidFieldGen(gen2))
	{
		gen2.has_tesla = value;
		if (value)
			gen2.no_grenades_2 = time;
	}
};

float() GetFieldForcedStatus =
{
	local entity gen1, gen2;
	gen1 = GetMyFieldGen(self);
	gen2 = Find_OtherGen(gen1);

	if (IsValidFieldGen(gen1) && IsValidFieldGen(gen2))
	{
		if (gen1.has_tesla || gen2.has_tesla)
			return TRUE;
	}
	else if (IsValidFieldGen(gen1))
		return gen1.has_tesla;
	else if (IsValidFieldGen(gen2))
		return gen2.has_tesla;

	return FALSE;

};

#endif

//=========================================================================
// returns TRUE if 'who' entity should be able to pass thru the field

float(entity tfield, entity who) Field_ItCanPass =
{
	if (FieldIsMalfunctioning(tfield) & SCREWUP_ONE)
		return FALSE;

/*
	if (who == tfield.real_owner) // field owner - always pass
		return TRUE;
*/
	if (Field_GetForcedStatus(tfield)) 
		return FALSE;

	if (who.classname == "player") // PLAYERS
	{
		if (Teammate(who.team_no, tfield.real_owner.team_no)) // teammate
			return TRUE;

		if (Teammate(who.undercover_team, tfield.real_owner.team_no)) // spies disguised as our team
			return TRUE;
	}
	else if (IsMonster(who))  // MONSTERS/ARMY
	{
		if (Teammate(who.real_owner.team_no, tfield.real_owner.team_no)) // team monster
			return TRUE;
	}

	return FALSE;
};

//=========================================================================
// returns 1 or 2 if 'who' entity should be damaged by the field
// 1 if it's an enemy, 2 if a friendly and has been hacked

float(entity tfield, entity who) Field_ShouldDamage =
{
	local float fr;
	if (FieldIsMalfunctioning(tfield) & SCREWUP_ONE)
		fr = 2;
	else
		fr = 0;

	if (who.classname == "player") // PLAYERS
	{
		if (who == tfield.real_owner) // field owner
			return fr;

		if (Teammate(who.team_no, tfield.real_owner.team_no)) // teammate
			return fr;

		if (Teammate(who.undercover_team, tfield.real_owner.team_no)) // spies disguised as our team
			return fr;
	}
	else if (IsMonster(who))  // MONSTERS/ARMY
	{
		if (Teammate(who.real_owner.team_no, tfield.real_owner.team_no)) // team monster
			return fr;
	}

	return 1;
};

//=============================================================================
// applies the particle effect and electric sound (at max 4hz rate)

void(entity tfield, vector where, entity thing) FieldExplosion =
{
	if (!tfield.has_camera)
	{
		if (!thing || thing.is_removed) return;

		local vector whereFX;
		whereFX = where;
		whereFX.z = tfield.origin.z;

		spawnFOG(whereFX);
		sound(tfield,CHAN_BODY,"effects/crunch.wav",0.5,ATTN_NORM);

		tfield.has_camera = TRUE; // cya soon
	}
};

void(entity field) PutFieldWork =
{
	if (IsValidFieldGen(field.demon_one))
		field.demon_one.tp_grenades_1 = time + FIELDGEN_SHOCKTIME;		  
	if (IsValidFieldGen(field.demon_two))
		field.demon_two.tp_grenades_1 = time + FIELDGEN_SHOCKTIME;
};

void() Field_touch =
{
	if (other.classname == "force_field") return; //avoid weird loops with other fields

	deathmsg = DMSG_FORCEFIELD;
	if (self.dmg == FIELDGEN_DMGINSIDE)
		deathmsg = DMSG_STUCK_FORCEFIELD;
	else
		self.dmg = FIELDGEN_DMG;

	Field_touch_SUB();
};

//===================================================================================
// creates the force field between the 2 generators (only if none currently on)

void(entity gen1, entity gen2) Create_Field =
{
	//local string foo;

	if (gen1.fieldgen_hasfield || gen2.fieldgen_hasfield)
		return;

	//foo = "gen1: " + vtos (gen1.origin) + " " + vtos (gen1.absmin) + " " + vtos (gen1.absmax);
	//dprint(foo + "\n");
	//foo = "gen2: " + vtos (gen2.origin) + " " + vtos (gen2.absmin) + " " + vtos (gen2.absmax);
	//dprint(foo + "\n");
/*	dprint("gen1:\n");
	eprint(gen1.fieldgen_field);
	dprint("gen2:\n");
	eprint(gen2.fieldgen_field);
	dprint("done\n"); */

	if (gen1.fieldgen_field || gen2.fieldgen_field) // CHECK
		return;

	// already checked b4 on CanLink -> CanIdle
	/*if (!IsValidFieldGen(gen1) || !IsValidFieldGen(gen2))
		return;*/

	gen1.fieldgen_status = FIELDGEN_ISENABLED;
	gen2.fieldgen_status = FIELDGEN_ISENABLED;

	gen1.fieldgen_hasfield = TRUE;
	gen2.fieldgen_hasfield = TRUE;

	local entity tfield;

	// generate field
	tfield = spawn();
	tfield.classname = "force_field";
	tfield.owner = nil;
	tfield.real_owner = gen1.real_owner; // --> player

	tfield.think = Field_think;
	tfield.touch = Field_touch;
	tfield.nextthink = time + 0.25;

	// set pos and size
	tfield.size.x = vlen (gen1.origin - gen2.origin) - 10;
	tfield.size.y = 4;
	tfield.size.z = 48; // was 64, but 48 is more realistic
	tfield.maxs = tfield.size * 0.5; // FIXME: / 2 is broken
	tfield.mins = -tfield.maxs;
	tfield.origin = AVG (gen1.origin, gen2.origin);
	tfield.origin.z = AVG (gen1.absmax.z, gen2.absmax.z) - tfield.maxs.z - 1;
	tfield.forcefield_offset = (gen2.origin - gen1.origin);

	local vector right, forward, up;

	up = '0 0 1';
	right = normalize (gen2.origin - gen1.origin);
	forward = crossproduct (up, right);

//	local string foo;
//	foo = "right: " + vtos (right) + "\nforward: " + vtos (forward)
//		  + "\nup: " + vtos (up) + "\nmins: " + vtos (tfield.mins)
//		  + "  maxs: " + vtos (tfield.maxs) + "\norigin: " + vtos (tfield.origin) + "\n";
//	dprint (foo);
	tfield.rotated_bbox = getboxhull();
	rotate_bbox (tfield.rotated_bbox, right, forward, up, tfield.mins,
				 tfield.maxs);
	
	local vector mins, maxs;
	mins = getboxbounds (tfield.rotated_bbox, 0);
	maxs = getboxbounds (tfield.rotated_bbox, 1);

	// apply stuff
	tfield.movetype = MOVETYPE_NONE;
	tfield.solid = SOLID_BBOX;
	setsize(tfield, mins, maxs);
	setorigin(tfield, tfield.origin);
//	foo = "min: " + vtos (mins) + "\n" +
//	      "max: " + vtos (maxs) + "\n" +
//	      "absmin: " + vtos (tfield.absmin) + "\n" +
//	      "absmax: " + vtos (tfield.absmax) + "\n";
//	dprint (foo + "\n");

	// assign the pointers on the field generators
	gen1.fieldgen_field = tfield;
	gen2.fieldgen_field = tfield;

	// assign the pointers to generators on ourselves
	tfield.demon_one = gen1;
	tfield.demon_two = gen2;

	//make activating sound
	sound (tfield, CHAN_VOICE, "misc/ffact.wav", 0.2, ATTN_NORM);

	// flash generators
	gen1.effects = EF_DIMLIGHT;
	gen1.has_teleporter = TRUE;
	gen1.skin = 2;
	gen2.effects = EF_DIMLIGHT;
	gen2.has_teleporter = TRUE;
	gen2.skin = 2;

	if (gen1.martyr_enemy)
		tfield.martyr_enemy = gen1.martyr_enemy;
	else if (gen1.martyr_enemy)
		tfield.martyr_enemy = gen2.martyr_enemy;
	else
		tfield.martyr_enemy = nil;

/*	// make sure the field goes off instantly if there's somebody in it
	local entity oldself;
	oldself = self;
	self = tfield;
	self.think ();
	self = oldself; */
};

//=================================================================0
// removes the force field (if any)

void(entity gen1, entity gen2) Remove_Field =
{
	if (IsValidFieldGen(gen1))
	{	
		if (IsValidField(gen1.fieldgen_field))
		{
			freeboxhull (gen1.fieldgen_field.rotated_bbox);
			dremove(gen1.fieldgen_field);
		}
		gen1.fieldgen_hasfield = FALSE;
		gen1.fieldgen_field = nil;
		if (IsValidFieldGen(gen2))
		{
			gen2.fieldgen_hasfield = FALSE;
			gen2.fieldgen_field = nil;
		}
	}
	else if (IsValidFieldGen(gen2))
	{
		if (IsValidField(gen2.fieldgen_field))
		{
			freeboxhull (gen2.fieldgen_field.rotated_bbox);
			dremove(gen2.fieldgen_field);
		}
		gen2.fieldgen_hasfield = FALSE;
		gen2.fieldgen_field = nil;
	}
};

float(entity field) IsValidField =
{
	if (!field)
		return FALSE;
	
	if (field.classname != "force_field")
		return FALSE;

	return TRUE;
};

float(entity field) IsValidFieldGen =
{
	if (!field)
		return FALSE;
	
	if (field.classname != "building_fieldgen")
		return FALSE;
  
	return TRUE;
};

//========================================================
// starts or removes sounds on the field

void(entity tfield, entity gen1) Field_UpdateSounds =
{
	//fieldgen_status : hum
	//fieldgen_hasfield : shield
	
	if (IsValidField(tfield)) // only if there is a field currently
	{
		local float playhum, playshield;
		playhum = FALSE; playshield = FALSE;

		/*if (gen1.fieldgen_status == FIELDGEN_ISOFF) // for some reason we r not working
		{
			playhum = FALSE;
			playshield = FALSE;
		}
		else if (gen1.fieldgen_status == FIELDGEN_ISIDLE) // awaiting for link
		{
			playhum = FALSE;
			playshield = FALSE;
		}
		else if (gen1.fieldgen_status == FIELDGEN_ISDISABLED) // teammate passing thru the field?
		{
			playhum = FALSE;
			playshield = FALSE;			   
		}
		else*/
		
		if (gen1.fieldgen_status == FIELDGEN_ISENABLED)
		{
			playhum = TRUE;
			playshield = FALSE;
		}
		else if (gen1.fieldgen_status == FIELDGEN_ISWORKING)
		{
			playhum = TRUE;
			playshield = TRUE;		  
		}

		// MAKE THE SHIT SOUND !
		if (!playhum)
		{
			if (tfield.fieldgen_status)
			{
				sound(tfield,CHAN_MISC,"misc/null.wav",0.5,ATTN_NORM);
				tfield.fieldgen_status = FALSE;
			}
		}
		else
		{
			if (!tfield.fieldgen_status || tfield.has_tesla < time)
			{
				sound(tfield,CHAN_MISC,"misc/ffhum.wav",0.3,ATTN_NORM);
				tfield.has_tesla = time + 1;
				tfield.fieldgen_status = TRUE;
			}
		}

		if(!playshield)
		{
			if (tfield.fieldgen_hasfield)
			{
				sound(tfield,CHAN_ITEM,"misc/null.wav",0.2,ATTN_NORM);
				tfield.fieldgen_hasfield = FALSE;
			}
		}
		else
		{
			if (!tfield.fieldgen_hasfield || tfield.has_sentry < time)
			{
				//TODO?: lower volume as (FIELDGEN_SHOCKTIME - time) decreases
				
				sound(tfield,CHAN_ITEM,"misc/ffield.wav",0.4,ATTN_NORM);
				tfield.has_sentry = time + 1;
				tfield.fieldgen_hasfield = TRUE;
			}
		}
	
	}


};

//====================================================================
// do the lightning stuff while field is FIELDGEN_ISWORKING

void(entity tfield) Field_MakeVisual =
{
	if (IsValidField(tfield))
	{	   
		local vector f;
		
		f = tfield.origin + (tfield.forcefield_offset * 0.5 * (random() * 2 - 1));

		WriteByte (MSG_MULTICAST, SVC_TEMPENTITY);
		if (random() > 0.5)
			WriteByte (MSG_MULTICAST, TE_LIGHTNING2);
		else
			WriteByte (MSG_MULTICAST, TE_LIGHTNING1);
		WriteEntity (MSG_MULTICAST, tfield);
		WriteCoord (MSG_MULTICAST, f.x);
		WriteCoord (MSG_MULTICAST, f.y);
		WriteCoord (MSG_MULTICAST, tfield.origin.z + tfield.mins.z);
		WriteCoord (MSG_MULTICAST, f.x);
		WriteCoord (MSG_MULTICAST, f.y);
		WriteCoord (MSG_MULTICAST, tfield.origin.z + tfield.maxs.z);
	}
};

//==================================================
// called every frame by the field generators

void() FieldGen_think =
{
	local entity othergen;
	othergen = Find_OtherGen(self); // get our brother
	
	if (FieldGens_CanLink(self,othergen))
		Create_Field(self,othergen); // checks redundancy itself
	else
		Remove_Field(self,othergen); // checks redundancy itself

	// field main loop (ai? heh.. my cat is smarter than these force fields)
	if (self.fieldgen_status == FIELDGEN_ISOFF) // for some reason we r not working
	{
		self.effects = 0;
		self.skin = 0;

		if (FieldGen_CanIdle(self)) // can we go idle?
			self.fieldgen_status = FIELDGEN_ISIDLE;

	}
	else if (self.fieldgen_status == FIELDGEN_ISIDLE) // awaiting for link
	{
		self.effects = 0;
		self.skin = 0;
		
		if (self.no_grenades_1 < time) // trying to link sound/flash time
		{
			sound (self, CHAN_WEAPON, "misc/fffail.wav", 0.5, ATTN_IDLE);
			self.skin = 1;
			self.effects = EF_DIMLIGHT;
			self.no_grenades_1 = time + FIELDGEN_LINKTIME;
		}

	}
	else if (self.fieldgen_status == FIELDGEN_ISDISABLED) // teammate passing thru the field?
	{
		self.effects = 0;
		self.skin = 0;

		// time check
		if (self.no_grenades_2 < time) // can we go idle?
		{	 
			self.fieldgen_status = FIELDGEN_ISIDLE;
			self.tp_grenades_1 = 0;
		}
		
	}
	else if (self.fieldgen_status == FIELDGEN_ISENABLED)
	{
		if (!self.has_teleporter)
		{
			self.effects = 0;
			self.skin = 1;
		}

		if (self.fieldgen_hasfield == FALSE)
			self.fieldgen_status = FIELDGEN_ISIDLE;
		
		if (self.tp_grenades_1 >= time)
			self.fieldgen_status = FIELDGEN_ISWORKING;
	}
	else if (self.fieldgen_status == FIELDGEN_ISWORKING)
	{
		self.effects = EF_DIMLIGHT;
		self.skin = 2;		  

		if (self.has_camera <= time)
		{
			self.ammo_cells = self.ammo_cells - FIELDGEN_CELLSCOST;
			self.has_camera = time + 1;
		}

		if (self.fieldgen_hasfield == FALSE)
			self.fieldgen_status = FIELDGEN_ISIDLE;
		else if (self.tp_grenades_1 <= time)
			self.fieldgen_status = FIELDGEN_ISENABLED;
	}

	Field_UpdateSounds(self.fieldgen_field, self); // update force field sounds

	if (!FieldGen_CanIdle(self)) // turn us off if needed
		self.fieldgen_status = FIELDGEN_ISOFF;
   
	self.has_teleporter = FALSE; // resets 'flash' status bypass
	self.nextthink = time + 0.1;
};

//=======================================================================
// returns TRUE if the generator could currently go to idle status

float(entity fieldgen) FieldGen_CanIdle =
{
	if (!(IsValidFieldGen(fieldgen)))
		return FALSE;

	if (fieldgen.ammo_cells >= FIELDGEN_CELLSCOST &&
		!(fieldgen.is_malfunctioning & SCREWUP_FOUR)
		&& fieldgen.health > 0)
		return TRUE;

	return FALSE;
};

//=======================================================================
// returns TRUE if both generators could currently generate the field

float(entity fieldgen1, entity fieldgen2) FieldGens_CanLink =
{
	if (!(IsValidFieldGen(fieldgen1)) || !(IsValidFieldGen(fieldgen2)))
		return FALSE;

	if (!visible2(fieldgen1,fieldgen2))
		return FALSE;
	
	local float r;
	r = vlen(fieldgen1.origin - fieldgen2.origin); // get distance between generators

//	  if ((fieldgen1.num_mines & IMPROVED_FOUR && fieldgen2.num_mines & IMPROVED_FOUR) && r > FIELDGEN_HACKEDRANGE2)
//		  return FALSE;
  
	/*if (fieldgen1.num_mines & IMPROVED_FOUR || fieldgen2.num_mines & IMPROVED_FOUR)
	{
		if ((fieldgen1.num_mines & IMPROVED_FOUR && fieldgen2.num_mines & IMPROVED_FOUR) && r > FIELDGEN_HACKEDRANGE2)
			return FALSE;
		else
		if ((fieldgen1.num_mines & IMPROVED_FOUR || fieldgen2.num_mines & IMPROVED_FOUR) && r > FIELDGEN_HACKEDRANGE)
			return FALSE;				  
	}*/

	if ((fieldgen1.num_mines & IMPROVED_FOUR || fieldgen2.num_mines & IMPROVED_FOUR) && r > FIELDGEN_HACKEDRANGE)
		return FALSE;

	if (r > FIELDGEN_RANGE && !(fieldgen1.num_mines & IMPROVED_FOUR || fieldgen2.num_mines & IMPROVED_FOUR))
		return FALSE;

	if (fabs(fieldgen1.origin.z - fieldgen2.origin.z) > FIELDGEN_MAXZ)
		return FALSE;

	if (fieldgen1.fieldgen_status == FIELDGEN_ISDISABLED || fieldgen2.fieldgen_status == FIELDGEN_ISDISABLED)
		return FALSE;

	if (fieldgen1.fieldgen_status == FIELDGEN_ISOFF || fieldgen2.fieldgen_status == FIELDGEN_ISOFF)
		return FALSE;

	if (FieldGen_CanIdle(fieldgen1) && FieldGen_CanIdle(fieldgen2))
		return TRUE;
	
	return FALSE;
};

//=============================================================================================
// initialize field generator stuff just after beeing built, called on engineer.qc

void(entity field) Field_Built =
{
	field.touch = nil;
	field.think = FieldGen_think;
	field.nextthink = time + 0.1;
	field.fieldgen_status = FIELDGEN_ISIDLE; // we start on IDLE status (searching for other gen to link)
	field.fieldgen_hasfield = FALSE;
	field.no_grenades_1 = time + 3;
	field.fieldgen_field = nil;
	field.martyr_enemy = nil;
};

//==============================================================
// returns our other generator (if any)

entity(entity fieldgen) Find_OtherGen =
{
	local entity te;
	local float foundit;
	te = nil;
	foundit = FALSE;

	te = find(nil, classname, "building_fieldgen");
	while (te && foundit == FALSE)
	{
		if (te.real_owner == fieldgen.real_owner) // is it ours?
		if (te != fieldgen)						  // and not the same generator..
			foundit = TRUE; // yeah, found it
		
		if (foundit == FALSE) // our search must continue...
			te = find(te, classname, "building_fieldgen");
	}

	return te;
};

//=========================================================================================
// returns the place where field gen could be built related to player current pos and yaw
// called on engineer.qc, place is the origin passed where other kind of buildings are built
// FIXME: changed to allow placing anywhere.  comments need updating

void (vector place) WhereGen =
{
	// if we have no field generator currently, it can be placed anywhere
	if (self.has_fieldgen == 0)
		return;

	local float r, foundit;
	local entity te = nil;

	foundit = FALSE;

	// find the other generator
	do {
		te = find (te, classname, "building_fieldgen");
		if (te.real_owner == self)
			foundit = TRUE;
	} while (te && foundit == FALSE);
/*
	te = find (nil, classname, "building_fieldgen");
	while (te && foundit == FALSE)
	{
		if (te.real_owner == self) // is it ours?
			foundit = TRUE; // yeah, found it
		
		if (foundit == FALSE) // our search must continue...
			te = find (te, classname, "building_fieldgen");
	}*/

	// check for error getting the other gen
	if (!te || te.classname != "building_fieldgen" || foundit == FALSE)
	{
		RPrint("BUG: Error on field generator placement routine. 'WhereGen()'\n");
		return;
	}

	// print message if they wont link
	if (!vis2orig (te.origin,place))
		sprint (self, PRINT_HIGH,
			"Your field generators won't link, there are obstacles between them!\n");
	
	r = vlen(te.origin - place); // get distance between generators

	if (r > FIELDGEN_HACKEDRANGE && te.num_mines & IMPROVED_FOUR)
		sprint (self, PRINT_HIGH,
			"Your field generators are too far away to link, even hacked\n");
	
	if (r > FIELDGEN_RANGE && !(te.num_mines & IMPROVED_FOUR))
		sprint (self, PRINT_HIGH,
			"Your field generators are too far away to link\n");

	if (fabs (place.z - te.origin.z) > FIELDGEN_MAXZ)
		sprint (self, PRINT_HIGH,
			"Your field generators are at different heights, they won't link\n");

	// return the final building place
	return;
};

//======================================================================
// damn! our field generator was destroyed. Force field must go down..

void() FieldGen_Die =
{
	self.real_owner.has_fieldgen = self.real_owner.has_fieldgen - 1;
	if (self.real_owner.has_fieldgen < 0) self.real_owner.has_fieldgen = 0;

	WriteByte (MSG_MULTICAST, SVC_TEMPENTITY);
	WriteByte (MSG_MULTICAST, TE_EXPLOSION);
	WriteCoord (MSG_MULTICAST, self.origin.x);
	WriteCoord (MSG_MULTICAST, self.origin.y);
	WriteCoord (MSG_MULTICAST, self.origin.z);
	multicast (self.origin, MULTICAST_PHS);

	// check if field should be removed..
	local entity othergen;
	othergen = Find_OtherGen(self);
	if (IsValidFieldGen(othergen))
	{
	   Remove_Field(self, othergen);	
	}
	else
	{
	   Remove_Field(self, nil); // extra removal, not needed i think...
	}

	sprint(self.real_owner, PRINT_HIGH, "Your field generator was destroyed.\n");

	//TODO: gibs, one of the tesla, one custom

	dremove(self);
};

//=========================================================================
// Engineer has used a Spanner on the field generator

void(entity field) Engineer_UseFieldGen =
{
	self.building = field;
	
	if (Teammate(self.building.real_owner.team_no,self.team_no) && self.building.is_malfunctioning & SCREWUP_THREE)
	{		 
		//if (self.building.is_malfunctioning & SCREWUP_FOUR)
		//{			
		sprint(self,PRINT_HIGH,"Trapped field generator, have a nice day!\n");
			
		deathmsg = DMSG_FGTRAP;
		//used to do radius damage
		TF_T_Damage(self, self.building, self.building.martyr_enemy, FGTRAP_DMG, 0, TF_TD_ELECTRICITY);
		return;
		//}
	}

	local entity dist_checker;
	local string st;

	sprint(self, PRINT_HIGH, "Field Generator has ");
	st = ftos(field.health);
	sprint(self, PRINT_HIGH, st);
	sprint(self, PRINT_HIGH, "¯");
	st = ftos(field.max_health);
	sprint(self, PRINT_HIGH, st);
	sprint(self, PRINT_HIGH, " èåáìôè, ");
	st = ftos(field.ammo_cells);
	sprint(self, PRINT_HIGH, st);
	sprint(self, PRINT_HIGH, "¯");
	st = ftos(field.maxammo_cells);
	sprint(self, PRINT_HIGH, st);
	sprint(self, PRINT_HIGH, " ãåììó\n");

	// Pop up the menu
	self.current_menu = MENU_ENGINEER_FIX_FIELDGEN;
	self.menu_count = MENU_REFRESH_RATE;

	//dodgy
	if (teamplay != 0 && !Teammate(self.building.real_owner.team_no,self.team_no)) {
		Menu_EngineerFix_FieldGen_Input(4);
		return;
	}

	// Start a Distance checker, which removes the menu if the player
	// gets too far away from the sentry.
	dist_checker = spawn();
	dist_checker.classname = "timer";
	dist_checker.owner = self;
	dist_checker.enemy = field;
	dist_checker.think = CheckDistance;
	dist_checker.nextthink = time + 0.3;
};