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The Active Bodies simulation currently supports interaction between scene geometry and the Phoenix FD Liquid Simulator. Interaction between Active Bodies and the Phoenix FD Fire/Smoke Simulator is not supported yet. Mutual interaction between the Active Bodies themselves is not supported yet. |
The Active Bodies Solver node sets up global simulation parameters which affect all Active Body objects in the Interaction list, in contrast to the Phoenix FD Per-Node Properties which are unique for each Active Body. This way you can have several Active Body Solver nodes, each with their own set of Active Bodies with different rigid body behavior for each set.
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Active Body Solver
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Solver | solver – Specifies which solver will be used for the Active Bodies scene interaction.
Bullet – Uses the Bullet solver for the Active Bodies interaction. Allows for mutual interaction between Active Bodies.
Basic – Uses the legacy basic solver for the Active Bodies interaction. This solver does not support mutual interaction between Active Bodies.
Interaction Steps | timestep_mult – Determines how many calculations for the Active Bodies are performed between two consecutive frames of the timeline. Increasing the value will make the Active Bodies move smoother and increase the overall accuracy of the collisions at the expense of simulation time.
Fluid Density Multiplier | interaction_mult – Allows you to override the density of the simulated liquid. By default, 1.0 is considered 1000 kilograms per cubic meter (the density of water). Increasing this value will cause the Active Bodies to appear lighter and sink less inside the fluid simulation, and vice versa.
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Air Drag | simulate_air_drag – Applies a simple Drag force to slow down the translation and rotation of the Active Body. This option helps stabilize the motion of objects in the simulation. The Air Drag will affect the simulation only when the Basic solver is used.
Scene Interaction
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Interaction Set | interactionSet – Determines which objects will be processed by the simulation. By default, all objects in the set will be treated as Active Bodies. Scene geometry not preset in the Interaction Set will be ignored by the Active Bodies Solver. Enable the Exclude List option to reverse this behavior.
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