Pump from Objects shelf tool

Gives smoke a velocity as soon it touches the pump.

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Overview
Using Pump from Objects

Overview ¶

This tool can be used to give smoke direction. The selected geometry is converted into a pump volume that defines the region of the pump’s influence, and a velocity volume, v. The velocity fields is obtained by rasterizing the v attribute of points scattered on the surface. Hence, the selected geometry must have the desired pump velocity stored in the v attribute.

Note

You can use the Point Velocity SOP to add a v point attribute to geometry.

Note

This tool only works with smoke and pyro simulations.

Using Pump from Objects ¶

To...	Do this
Create a fluid container	See Smoke Container or Pyro Container.
Fill a fluid container	See Source from Surface, Source from Points, and Source from Volume.
Create a pump	Click the Pump from Objects tool. Select the object to generate the velocity and press `Enter`. Select the fluid container and press `Enter`.
Control the added velocity	In the DOP network, find the Volume Source node importing the pump field (named `source_v_from_‹object›`). Use the Scale parameter for the `vel` field to control the added velocity. You can keyframe this value to delay and/or limit the pump time, pulse the pump, etc.