
Orbit is an all purpose Dynamics node that forces particles on a circular
path around a center supplied by the Position input of this node. Many
advanced effects can be created by this Dynamics node.
ON - (Bool) This input data
stream determines whether the operator is considered 'on' or 'off'. You
can connect other operators to this input channel such as a Bool
Helper to activate/deactivate the whole operator.
Time - (Time) This input data stream is used to define the local
time for the operator when the user wants to override the default system
time.
Particle - (Particle) this input data stream reads in the currently
selected particle group and uses those for the Node functions.
Position - (Position) sets the center position of the orbit effect.
Note you may input here multiple particle positions as well.
Alignment - (Alignment) specifies the rotation or alignment in
space around the Position of the object to orbit. Feeding the Position
and Alignment from a Node Helper node will make sure that the orbit stays
always in synch with the moving or animated object.
UI Control Parameters - those input data streams are the equivalent
of the UI controls, keep in mind that there is no visual indication that
an operator is connected to any of those inputs! It might be needless
to adjust a value if it gets overwritten by a connected operator.
No Operator Outputs.

Speed - sets the speed the particles travel around the center
position.
Variation % - adds a variation to the Speed amount so that not
all particles orbit around the center Position at the same speed. The
higher this value the more variation will be.
Angle Speed - when checked, the Speed value is interpreted as
an angular speed. This has the advantage of setting a constant rotational
speed independent of the distance the particles have to travel.
Phase - controls the phase around the orbit. Changing this value
will shift the particles on their orbit forward or backward.
Variation % - adds a random variation on top of the Phase value.
Higher values will create more random phase values per particle.
Alignment Variation % - randomizes the Alignment data that is
fed into the Alignment port. Higher values will create more randomness
in the Alignment data.
Position Variation % - adds a random value onto the positional
information that is fed into the Orbit Node.
Center Variation % - randomizes the orbit positions, the higher
this value the more randomized the positions will be.