This page provides information on the Plain Force component.
Overview
The Plain Force pushes a fluid according to the helper's orientation. It is used to produce a gravity or a wind effect. The dynamics are controlled by two parameters that balance between predictability and natural behavior: force magnitude (Strength) and Drag.
Parameters
Strength | strength – Specifies the acceleration force measured in scene units/sec^2.
Drag | drag – Specifies a value between 0 and 1 to determine how much of the existing velocity will be negated over the period of 1 second. The bigger the drag, the more the fluid behavior is suppressed and the less the fluid features are pronounced. A value of 1.0 stops the fluid's motion.
Max Distance | maxdist – Specifies the distance where the force disappears.
Fade Start | fadestart – Specifies the relative distance (as part of the Max Distance) where the force starts to gradually decline.
Affect | affect – Specifies the affected components of the simulation separated by commas. The supported elements are:
Liquid - affects the Liquid particles in a Liquid simulation.
Splashes - affects the Splash particles in a Liquid simulation.
Foam - affects the Foam particles in a Liquid simulation.
Mist - affects the Mist particles in a Liquid simulation.
Air - affects the space in a Liquid simulation where there are no Liquid particles, when Simulate Air Effects is enabled in the Dynamics rollout. All particles such as Foam, Splash or Mist outside the liquid volume will be influenced.
Temperature - affects the Temperate channel in a Fire/Smoke simulation.
Smoke - affects the Smoke channel in a Fire/Smoke simulation.
Fuel - affects the Fuel channel in a Fire/Smoke simulation.
Affect Names are not case sensitive and any unknown element found in the list is ignored.
All Fire/Smoke Channels | unformfiresmoke - When enabled, the Plain Force will affect the entire Fire/Smoke Simulator.
Note that even if you add all three channels: Temperature, Smoke and Fuel, this is not the same as enabling the option to affect the entire Fire/Smoke Simulator. The option will allow the Plain Force to create Velocity even in the empty air where there is no Temperature, Smoke and Fuel.
Apply Force Behind Icon | applyforcebehind – When enabled, the force will be applied behind the helper icon.
Terminal velocity – The velocity at which the acceleration caused by the force (Strength) is equal to the deceleration caused by the drag.
