drag_influence

This drag_influence can be used to simulate effects of air drag. By its self drag_influence damps the simulation velocity. If there are any other influence nodes connected to this that add an acceleration then this will damp motion towards that accelleration, rather than zero velocity. This can simulate high drag in situations where the medium, like water, is flowing.

To use this node, plug its output into the influences input of a simulate node like simulate_aero, simulate_particles, or simulate_mpm.

Inputs

influence

One may optionally connect an influence field out_influence into this port. For example a mask_influence node could be connected to mask the effect of this influence. Any number of influence fields may be added to the daisy chain to build a complex field.

enable

Turn off to disable the effect. Disabling makes it a pass through node. Note that any other influence fields connected to the influence input port will still be active when this is disabled.

drag

This is the rate at which velocity is dragged towards the influence velocity, which is zero unless other influence nodes are chained with with one. You can connect a ScalarField to vary the effect over space.

Outputs

out_influence

An output influence object that one can connect to simulation nodes or other influence nodes.