A_LookForBetter - SRB2 Wiki

A_LookForBetter is an action that looks for a player and sets them as the new target. The upper 16 bits of Var1 can be used to specify a distance limit in fracunits. Only players within that limit can be targeted. If the lower 16 bits are set to 0, the actor only looks in front of itself, otherwise it looks all around. Once it has a target, it keeps track of it until a better one can be found.

Attributes	Use
Var1	Upper 16 bits: Distance limit Lower 16 bits: 0 – looks only in front; 1 – looks all around
Var2	unused

Code – A_LookForBetter

// Function: A_LookForBetter
// Function: A_LookForBetter
//
// Description: A_Look, except it finds a better target in multiplayer, and doesn't lose the target in singleplayer.
//
// var1 lower 16 bits = 0 - looks only in front, 1 - looks all around
// var1 upper 16 bits = distance limit
// var2 = unused
//
void A_LookForBetter(void *data)
{
	mobj_t *actor = data;
	INT32 locvar1 = var1;

	if (LUA_CallAction(A_LOOKFORBETTER, actor))
		return;

	P_LookForPlayers(actor, (locvar1 & 65535), false, FixedMul((locvar1 >> 16)*FRACUNIT, actor->scale));
	A_FaceTarget(actor);
}

/* * Spawns a dust ring.
  *	The dust ring behaves slightly randomly so it doesn't look too uniform.
  *
  * \param mobjtype Thing type to make a ring of.
  * \param div Amount of things to spawn on the ring.
  * \param x Center X coordinates.
  * \param y Center Y coordinates.
  * \param z Center Z coordinates.
  * \param radius Radius.
  * \param speed Additional thrust on particles.
  * \param initscale Initial scale when spawning.
  * \param scale "Default" scale.
  */
static void P_DustRing(mobjtype_t mobjtype, UINT32 div, fixed_t x, fixed_t y, fixed_t z, fixed_t radius, fixed_t speed, fixed_t initscale, fixed_t scale)
{
	angle_t ang = FixedAngle(FixedDiv(360*FRACUNIT, div*FRACUNIT));  //(ANGLE_180/div)*2;
	UINT32 i;

	// it turned out the radius was effectively nullified thanks to errors in the original script
	// BUT people preferred how it looked before I "fixed" it, so I got rid of the radius calculations altogether
	// this was a bit of a mess to sort out, but at least it's probably somewhat fine now?
	// -- Monster Iestyn (21/05/19)
	(void)radius;

	for (i = 0; i < div; i++)
	{
		mobj_t *dust = P_SpawnMobj(
			x, //+ FixedMul(radius, FINECOSINE((ang*i) >> ANGLETOFINESHIFT)),
			y, //+ FixedMul(radius, FINESINE((ang*i) >> ANGLETOFINESHIFT)),
			z,
			mobjtype
			);
		if (P_MobjWasRemoved(dust))
			continue;

		dust->angle = ang*i + ANGLE_90;
		P_SetScale(dust, FixedMul(initscale, scale), true);
		dust->destscale = FixedMul(4*FRACUNIT + P_RandomFixed(), scale);
		dust->scalespeed = scale/24;
		P_Thrust(dust, ang*i, speed + FixedMul(P_RandomFixed(), scale));
		dust->momz = P_SignedRandom()*scale/64;
	}
}

}

	Actions – Checking	[view]
A_BubbleCheck • A_CheckAmbush • A_CheckHealth • A_CheckHeight • A_CheckRandom • A_CheckRange • A_CheckRings • A_CheckTargetRings • A_CheckThingCount • A_CheckTotalRings • A_CheckTrueRange • A_ChickenCheck • A_Look • A_LookForBetter • A_SearchForPlayers