#include "config.rh"

#include "paroxysm.rh"

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';
};
/*
================
InitTrigger
================
*/
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 vector	vdestdelta;
local float		len, traveltime;
	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 =
{
	activator = @self.enemy;
	SUB_UseTargets ();
	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	t, stemp, otemp, act;


	/*
		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 != "")) {
		@self.target_id_finished = time + 4; // don't let TargetID override centerprints
		
		centerprint (activator, @self.message);
		if (!@self.noise)
			sound (activator, CHAN_VOICE, "misc/talk.wav", 1, ATTN_NORM);
	}

	// kill the killtagets
	if (@self.killtarget) {
		t = world;
		do {
			if (!(t = find (t, targetname, @self.killtarget)))
				return;

			remove (t);
		} while ( 1 );
	}
	
	// fire targets
	if (@self.target) {
		act = activator;
		t = world;

		do {
			if (!(t = find (t, targetname, @self.target)))
				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 );
	}
	
};