game-source/quakeworld/subs.qc

void () SUB_Null = {};

void ()
SUB_Remove =
{
	remove (self);
};

/*
QuakeEd only writes a single float for angles (bad idea), so up and down are
just constant angles.
*/
vector ()
SetMovedir =
{
	if (self.angles == '0 -1 0')
		self.movedir = '0 0 1';
	else if (self.angles == '0 -2 0')
		self.movedir = '0 0 -1';
	else {
		makevectors (self.angles);
		self.movedir = v_forward;
	}
	
	self.angles = '0 0 0';
	return '0 0 0';
};

void ()
InitTrigger =
{
	// trigger angles are used for one-way touches.  An angle of 0 is assumed
	// to mean no restrictions, so use a yaw of 360 instead.
	if (self.angles != '0 0 0')
		SetMovedir ();
	self.solid = SOLID_TRIGGER;
	setmodel (self, self.model);	// set size and link into world
	self.movetype = MOVETYPE_NONE;
	self.modelindex = 0;
	self.model = "";
};

/*
=============
SUB_CalcMove

calculate self.velocity and self.nextthink to reach dest from
self.origin traveling at speed
===============
*/
void (entity ent, vector tdest, float tspeed, void () func)
SUB_CalcMoveEnt =
{
	local entity	stemp;
	stemp = self;
	self = ent;

	SUB_CalcMove (tdest, tspeed, func);
	self = stemp;
};

void (vector tdest, float tspeed, void () func)
SUB_CalcMove =
{
	local float		len, traveltime;
	local vector	vdestdelta;

	if (!tspeed)
		objerror ("No speed is defined!");

	self.think1 = func;
	self.finaldest = tdest;
	self.think = SUB_CalcMoveDone;

	if (tdest == self.origin) {
		self.velocity = '0 0 0';
		self.nextthink = self.ltime + 0.1;
		return;
	}

	// set destdelta to the vector needed to move
	vdestdelta = tdest - self.origin;

	// calculate length of vector
	len = vlen (vdestdelta);

	// divide by speed to get time to reach dest
	traveltime = len / tspeed;

	if (traveltime < 0.03)
		traveltime = 0.03;

	// set nextthink to trigger a think when dest is reached
	self.nextthink = self.ltime + traveltime;

	// scale the destdelta vector by the time spent traveling to get velocity
	self.velocity = vdestdelta * (1 / traveltime); // qcc won't take vec/float
};

// After moving, set origin to exact final destination
void ()
SUB_CalcMoveDone =
{
	setorigin (self, self.finaldest);
	self.velocity = '0 0 0';
	self.nextthink = -1;
	if (self.think1)
		self.think1 ();
};

/*
=============
SUB_CalcAngleMove

calculate self.avelocity and self.nextthink to reach destangle from
self.angles rotating 

The calling function should make sure self.think is valid
===============
*/
void (entity ent, vector destangle, float tspeed, void () func)
SUB_CalcAngleMoveEnt =
{
	local entity	stemp;
	stemp = self;
	self = ent;
	SUB_CalcAngleMove (destangle, tspeed, func);
	self = stemp;
};

void (vector destangle, float tspeed, void () func)
SUB_CalcAngleMove =
{
	local vector	destdelta;
	local float		len, traveltime;

	if (!tspeed)
		objerror ("No speed is defined!");

	// set destdelta to the vector needed to move
	destdelta = destangle - self.angles;

	// calculate length of vector
	len = vlen (destdelta);

	// divide by speed to get time to reach dest
	traveltime = len / tspeed;

	// set nextthink to trigger a think when dest is reached
	self.nextthink = self.ltime + traveltime;

	// scale the destdelta vector by the time spent traveling to get velocity
	self.avelocity = destdelta * (1 / traveltime);

	self.think1 = func;
	self.finalangle = destangle;
	self.think = SUB_CalcAngleMoveDone;
};

// After rotating, set angle to exact final angle
void ()
SUB_CalcAngleMoveDone =
{
	self.angles = self.finalangle;
	self.avelocity = '0 0 0';
	self.nextthink = -1;
	if (self.think1)
		self.think1 ();
};

//=============================================================================

void ()
DelayThink =
{
	local integer rem = self.killtarget != self.targetname;
	activator = self.enemy;
	SUB_UseTargets ();
	if (rem)
		remove (self);
};

/*
==============================
SUB_UseTargets

the global "activator" should be set to the entity that initiated the firing.

If self.delay is set, a DelayedUse entity will be created that will actually
do the SUB_UseTargets after that many seconds have passed.

Centerprints any self.message to the activator.

Removes all entities with a targetname that match self.killtarget,
and removes them, so some events can remove other triggers.

Search for (string)targetname in all entities that
match (string)self.target and call their .use function

==============================
*/
void ()
SUB_UseTargets =
{
	local entity	act, otemp, stemp, t;

	// check for a delay
	if (self.delay) {
		// create a temp object to fire at a later time
		t = spawn ();
		t.classname = "DelayedUse";
		t.nextthink = time + self.delay;
		t.think = DelayThink;
		t.enemy = activator;
		t.message = self.message;
		t.killtarget = self.killtarget;
		t.target = self.target;
		return;
	}

	// print the message
	if (activator.classname == "player" && self.message != "") {
		centerprint (activator, self.message);
		if (!self.noise)
			sound (activator, CHAN_VOICE, "misc/talk.wav", 1, ATTN_NORM);
	}

	// kill the killtagets
	if (self.killtarget) {
		local string kt = self.killtarget;
		t = world;
		do {
			t = find (t, targetname, kt);
			if (!t)
				return;
			remove (t);
		} while (1);
	}

	// fire targets
	if (self.target) {
		act = activator;
		t = world;
		do {
			t = find (t, targetname, self.target);
			if (!t)
				return;

			stemp = self;
			otemp = other;
			self = t;
			other = stemp;
			if (self.use != SUB_Null) {
				if (self.use)
					self.use ();
			}
			self = stemp;
			other = otemp;
			activator = act;
		} while (1);
	}
};