The Friction Operator allows you to apply friction to
your particles so they react dynamically to one another and anything they
collide with. Rule-based Friction effects solve many of your particle
system nightmares you might have experienced in the past. Friction effects
may be assigned to any particle group at any time, also removing friction
effects from any particle group is possible.
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 that is to have friction applied to it. The data
stream MUST be connected and will be highlighted yellow
if it is not.
Friction - (Scalar) This input data stream is used to override
the Friction spinner value.
Rotation Friction - (Scalar) This input data stream is used to
override the Rot. Friction spinner value.
No Operator Outputs.
Friction - This spinner is responsible for slowing down the forward
momentum that is applied to a particle Group. Please note that this effect
actually works like in the real world. At each time step that a particle
moves, there will be a constant energy loss until the particle comes to
a full stop. Higher values will reduce the forward speed of a particle
quicker.
NOTE: Be aware that there is no mass involved in the friction
calculation. Only the relative speed plays a role. Faster objects will
generate higher friction (air resistance) than slower particles.
Rot. Friction - This spinner is responsible for slowing down any
rotation that is applied to a particle. As is the case with the Friction
spinner, at each time step where a particle rotates, there will be a constant
rotational energy loss until the particle comes to a full stop. Higher
values will reduce the spin of a particle quicker.