Determining the difference in angles

[JJames19119]

Mind me if this is an easy thing, I'm still not very good with angles and math to this day.

I have an object that turns at different speeds, and it's supposed to be based on how closely it's looking at a point. For now I'll say that it uses an alt.value for this, it turns slowly if it's 1, moderately if it's 2 and quickly if it's 3. I also have it set up that it turns right if these values are positive (1, 2, and 3) and turns left if they're negative (-1, -2, and -3). No turning takes place if it's 0.

How would I go about determining what value to use in an event? I'd like it to switch to 1 (or-1) if it's nearly looking at the target, 3 if it's almost looking the opposite direction, and 2 for in between. I can get it to turn towards the point, but I can't figure out how to make ranged based on this information.

[schrodinger]

I would suggest using this short and elegant formula to get the angular difference
between the player aiming direction (angle_curr) and target position (angle_dest):

Atan2(Sin(angle_dest - angle_curr),cos( angle_dest - angle_curr))

this will give you signed angular difference in the range -180 +180, let's call it "ang_diff"

then you can simply add: (ang_diff/abs(ang_diff)) / 10.0
(or any "weighting" modifier that suits your needs)
to player angle, to have him gently rotate towards destination, faster if he is further from target angle

[mightyenigma]

could use a curved interpolation formula to make it smoothly transition from fastest to slowest turning based on angle difference. Does Ctf have a built in interp? if not you can write your own formula for it (though thats a bit of a pain for non-math fans)

But if you can do that then you dont need to have different speed settings if your goal is to swing the turret smoothly into line.


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[JJames19119]

I would suggest using this short and elegant formula to get the angular difference
between the player aiming direction (angle_curr) and target position (angle_dest):

Atan2(Sin(angle_dest - angle_curr),cos( angle_dest - angle_curr))

this will give you signed angular difference in the range -180 +180, let's call it "ang_diff"

then you can simply add: (ang_diff/abs(ang_diff)) / 10.0
(or any "weighting" modifier that suits your needs)
to player angle, to have him gently rotate towards destination, faster if he is further from target angle

I understood this well enough to make use of it for what I needed it for. Thanks!

[schrodinger]

Glad it was useful,
btw, I meant:

add: ang_diff / 10.0

and not:

add: (ang_diff/abs(ang_diff)) / 10.0

...which would add very small amounts!
(sorry, I mixed two ideas together while typing )