Add Vortex Node apply vortex force to the Simulation Data through Vortex Helper Object .

Input / Simulation Data:
Input simulation data for Add Vortex. You must connect this input for work.

Input / mask Grid:
Input SDF or Fog grid data for masking. The mask makes gradient effect between min Mask Falloff and max Mask Falloff.
Imported SDF Grid will be convert to Fog grid(surface = 0.0 / deepest = 1.0) and use that value for the gradient and effect.

Output / Simulation Data:
output result simulation data.

on/off:
Defines on/off status for this function.

Pick Vortex Helper:
Select Vortex Helper object from scene assets.

Make Vortex Helper:
Generate Vortex Helper object and set it to the node.

Value Type:
Select type of vortex value and vertical force. Velocity[unit / sec] / Acceleration[unit / sec^2]

Vortex Value:
Defines intensity of the vortex force.

Vertical Force:
Defines intensity of the vertical direction force.

Invert Mask
Inverts the mask.

min Mask Falloff:
Start (or End) Falloff value. If the mask voxel value is smaller than this, full effect.

max Mask Falloff:
End (or Start) Falloff value. If the mask voxel value is larger than this, no effect.