A_ChangeAngleRelative is an action that alters the actor's angle, counter-clockwise with respect to the angle it is already facing, by a random value between Var1 and Var2. To alter the actor's angle by a specific, non-random value, use that value for both Var1 and Var2. All values are given in degrees.
Code – A_ChangeAngleRelative
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// Function: A_ChangeAngleRelative
//
// Description: Changes the angle to a random relative value between the min and max. Set min and max to the same value to eliminate randomness
//
// var1 = min
// var2 = max
//
void A_ChangeAngleRelative(mobj_t *actor)
{
// Oh god, the old code /sucked/. Changed this and the absolute version to get a random range using amin and amax instead of
// getting a random angle from the _entire_ spectrum and then clipping. While we're at it, do the angle conversion to the result
// rather than the ranges, so <0 and >360 work as possible values. -Red
INT32 locvar1 = var1;
INT32 locvar2 = var2;
//angle_t angle = (P_RandomByte()+1)<<24;
const fixed_t amin = locvar1*FRACUNIT;
const fixed_t amax = locvar2*FRACUNIT;
//const angle_t amin = FixedAngle(locvar1*FRACUNIT);
//const angle_t amax = FixedAngle(locvar2*FRACUNIT);
#ifdef HAVE_BLUA
if (LUA_CallAction("A_ChangeAngleRelative", actor))
return;
#endif
#ifdef PARANOIA
if (amin > amax)
I_Error("A_ChangeAngleRelative: var1 is greater than var2");
#endif
/*
if (angle < amin)
angle = amin;
if (angle > amax)
angle = amax;*/
actor->angle += FixedAngle(P_RandomRange(amin, amax));
}
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