// common.qc: common functions

float() crandom = {
	return 2 * (random() - 0.5);
};

/*
=============
range

returns the range catagorization of an entity reletive to self
0 melee range, will become hostile even if back is turned
1 visibility and infront, or visibility and show hostile
2 infront and show hostile
3 only triggered by damage
=============
*/
float(entity targ) range = {
	vector spot1, spot2;
	float r;
	spot1 = self.origin + self.view_ofs;
	spot2 = targ.origin + targ.view_ofs;

	r = vlen(spot1 - spot2);
	if(r < 120) {
		return RANGE_MELEE;
	}
	if(r < 500) {
		return RANGE_NEAR;
	}
	if(r < 1000) {
		return RANGE_MID;
	}
	return RANGE_FAR;
};

/*
=============
visible

returns 1 if the entity is visible to self, even if not infront()
=============
*/
float(entity targ) visible = {
	vector spot1, spot2;

	spot1 = self.origin + self.view_ofs;
	spot2 = targ.origin + targ.view_ofs;
	traceline(spot1, spot2, TRUE, self); // see through other monsters

	if(trace_inopen && trace_inwater) {
		return FALSE; // sight line crossed contents
	}

	if(trace_fraction == 1) {
		return TRUE;
	}
	return FALSE;
};

/*
=============
infront

returns 1 if the entity is in front(in sight) of self
=============
*/
float(entity targ) infront = {
	vector vec;
	float dot;

	makevectors(self.angles);
	vec = normalize(targ.origin - self.origin);
	dot = vec * v_forward;

	if(dot > 0.3) {
		return TRUE;
	}
	return FALSE;
};

// EOF