Rotate an object towards an angle (stored in an alterable value)

[Nicholas Martin]

Hey guys! Simple question here. I used this formula to rotate an object towards a direction using x and y co-ordinates. Now I can't seem to figure out how to modify this to rotate an object towards a value stored in an alterable value inside the object

A.angle + Max(Min((((ATan2(A.y - B.y, B.x - A.x) - A.angle + 540) mod 360) - 180), Rotation), - 1 * Rotation)

I upgraded my level editor to allow you to rotate objects in the game. The objects use the physics engine and auto rotate back to their original angles if disturbed. Or they are supposed to. I just need a formula that compares the objects current angle to the one stored in the alterable value and rotates it slowly back to the stored position. Any help would be great! Thanks in advance!

Here is an example of how it should work with the rotating
http://gph.is/2jnfkVs

[Nicholas Martin]

Right now I have all objects auto rotate if they are not at 0 degrees. It is easy to have them auto rotate when not 0 degrees
ex:
active object 1 angle <180, set angle to angle -1
active object 1 angle >= 180, set angle to angle +1

This only works to rotate objects back to 0 degrees but now my level editor is much more dynamic and I need objects to rotate back to any degree. Having trouble figuring this out. Remember in my game bricks are using physics engine so they will be rotated if hit by an object. I need them to auto rotate back to their starting angle

attached is a comparison with the old and new editor

[Nicholas Martin]

I figured it out myself by trial and error. if anyone else needs to know how to do this the formula is

Angle to rotate = Angle( "Active" ) + Max(Min(( ( ( "angle you want to rotate to" - Angle( "Active" ) + 540 ) mod 360 ) - 180 ), rotation), 0 - rotation speed)

[Nicholas Martin]

I attached an example MFA I made for anyone who is struggling with this. It covers

> Calculating the angular difference between two objects
> Rotating to a desired angle
> Rotating towards a position


Feel free to edit and add more useful formulas to it regarding angles and rotations please and thank you

[aenever]

Wow that's super helpful thanks

[Nicholas Martin]

I am glad someone found a use for it

[amiman99]

Many Thanks, need it something like that just now, and modified it to use touch control coordinates.

[Nicholas Martin]

You're welcome dude. Glad it helped