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. the particle comes to a full stop. Higher values will reduce the spin of a particle quicker.