Movement like Pendulum example but full 360° clockwise and/or anticlockwise?

[Wodjanoi]

Example

I have an active object with an Alterable Value "Angl".
Always: Set angle to Sin(Angl( "Active" ) ) * 80
Add 3 to Angl

Now I have an active object swinging like a pendulum.

But how can I do full 360° swinging circles clockwise and/or anticlockwise using similar math functions?

[BaconUk]

Hi Wodjanoi,

Is this what your after?

[Wodjanoi]

I know this rotation example. It changes the position and I don't want that.

I prepared a mfa file.
It's a very smooth movement.
I want never ending 360° circular rotation, but I can't imagine a possible solution.

[King_Cool]

Like this?
There is probably a way of doing it with 'just' using an expression but...

[Wodjanoi]

That's a good example.
Is there any way to prevent that pause(or shorter pause without speed increase)?

[King_Cool]

Yes
Actually, i found a better method

Its an eqation as simpl as this, and its quite smooth and flexible:
Angle = Angle + RotationSpeed + Cos( Angle ) * Slowdown


- RotationSpeed determines the rotation speed of Pendulum, in degrees ( allways at top speed when at 6 oclock )
- Slowdown determines the 'peak' slowdown speed in degrees ( as it reaches 12 oclock )

Note that if Slowdown exceeds RotationSpeed, rotation will come to a halt ( so keep Slowdown lower than RotationSpeed )

[Wodjanoi]

Great! Simple and very useful. Thank you so much for this example.

I guess for clockwise rotation it's just:
Angle - RotationSpeed - Cos( Angle ) * Slowdown ?

[King_Cool]

Only one way to find out, but yeah should be

[King_Cool]

Ill have to correct my explanation of how this works.

Angle = Angle + RotationSpeed + Cos( Angle ) * Amplification

So

Angle = Angle + RotationSpeed
^ This makes the Pendulum rotate at a constant speed

Angle = Angle + RotationSpeed + Cos( Angle ) * Amplification
^Cos of an Angle returns an increasingly possitive number when Angle is pointing downward, and incresing negative number when pointing uppwards

( Assuming Pendulum is rotating counter-clockwize )
So what this means when appended to the constant rotations is, the Pendulum will recieve an 'increasing resistance', in rotation degrees, to its rotation speed as it approaches 12oclock, and an equal 'increasing boost', in rotation degrees, as it approaches 6oclock.
Amplification can then be defined as 'max rotation resistance and boost', in degrees.

- So the max rotation speed at 6 oclock will be equal to 'Rotation Speed + Amplification' ( in degrees )
- And the max rotation speed at 12 oclock will be equal to 'Rotation Speed - Amplification' ( in degrees )

And again, if the resistance/boost ( Amplification ) is greater than the constant rotation, Pendulum will reach a point where the Resistance cancles out the constant rotation and the Pendulum will come to a stop.