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This page provides information on the Plain Force (PhoenixFDPlainForce) component.

Overview

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Section

Column width 50% The Plain Force pushes a fluid according to the helper's orientation. It is used to produce a gravity or wind effect. The dynamics are controlled by two parameters, that balance between predictability and natural behavior: the Strength of the force (magnitude), and Drag. UI Text Box type note Note that the Drag determines how much the fluid’s behavior is suppressed, or how closely it follows just the Plain Force, while also preventing the fluid from continuously accelerating forever. UI Expand title UI Path: ||Phoenix FDl|| > Create > Plain Force Image Removed Image Added Column width 50%

Parameters

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Strength | strengthunits – Specifies the acceleration force measured in scene units/sec^2.

Drag | drag – Specifies – Specifies a value between 0 and 1 to determine how much of the existing velocity will be negated over the a period of 1 second. The bigger higher the drag, the more the fluid behavior is suppressed and suppressed and the less the less the fluid features are pronounced. A value of 1.0 stops would completely stop the motion of the fluid's motion. 

Maximum Distance (units) | maxdistunits – Specifies the distance to the helper icon at which the force completely disappears.Fade Start | fadestart – Specifies the relative distance (as part of the Maximum Distance) where the force starts to gradually decline.Allows you to limit the effect of the force to a box centered around the helper icon. The box is oriented along the Plain Force's arrow and extends infinitely to the sides, while the thickness of the box is represented by the Max Distance option. In case Apply Force Behind Icon is enabled, then the box's thickness doubles as the force would be applied behind the helper icon as well.

Fade Start | fadestart – This is a fraction between 0.0 and 1.0 of the Maximum Distance option and specifies the relative distance where the force starts to gradually decline. If set to 1, the force does not decline at all and just abruptly quits as it reaches the Maximum Distance. If set to 0, then the force starts declining right from the beginning and gradually stops working as the distance reaches Maximum Distance.

Affect | affect – Specifies the affected components of the simulation separated by commas. The supported elements are:

Liquid  - affects Affects the Liquid particles in a Liquid simulation.
Splashes -  affects Affects the Splash particles Splash particles in a Liquid simulation.
Foam -  affects Affects the Foam particles Foam particles in a Liquid simulation.
Mist  - affects  Affects the Mist particles in a Liquid simulation.
Air -  affects Affects the space in space in a Liquid simulation where simulation where there are no Liquid particles, when Simulate Air Effects is enabled in the LiquidDynamics rollout. All particles such as Foam, Splash or Mist outside the liquid volume will be influenced.
Temperature - affects Affects the Temperate channel in a Fire/Smoke simulation.
Smoke - affects Affects the Smoke channel in a Fire/Smoke simulation.
Fuel - affects Affects the Fuel channel in a Fire/Smoke simulation.

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Apply Force Behind Icon | applyforcebehind – When – When enabled, the force will be applied behind the helper icon as well. If this is turned off, the force would be applied to all voxels or particles of the simulation, as long as the voxel or particle is in the range of the Maximum Distance option.

Terminal velocity – The velocity at which the acceleration caused by the force (Strength) is equal to the deceleration caused by the drag.