Daemon : Attractor

Owned by thomas (Unlicensed)
Last updated: 18 Oct, 2018 by Alex Ribao
2 min read

This daemon attracts particles towards its centre – negative values create a repulsion. Attraction forces become stronger near the centre and particles experience greater acceleration.

 


Affect

There are two options:

  • "Force" accelerates the particles and they become faster and faster as long as the force is acting on them. 
  • “Velocity” only works with particles and adds the daemon's "Strength" value to a particle's speed. The resulting peak velocity remains constant during the simulation.
    An example: Let's assume the daemon's "Strength" is 9.8 and the emitter's "Speed" value is 2.0. Here, a particle's velocity will be roughly 11.8 m/s.
Internal force

This value determines the strength of the attraction (positive) or repulsion (negative) force.

Attractor type

You can choose from three types:

  • “Spherical” is the default type and is represented by a point in the centre of the daemon.
  • “Axial” produces a force field along a line from up to down – this line is also shown in the viewport. If you want to change the direction of the axis you have to rotate the daemon.
  • “Planetary” is represented by a sphere. The daemon simulates a planet’s force which extends from the centre to outer space. Use “Planet radius” to control the sphere's size.
Attenuated

This option unlocks three fields to specify the details for the force’s decease with growing distance from the centre.

Internal radius

If “Attenuated” is enabled this option becomes editable. The viewport gizmo's light blue circle indicates the radius where the force begins to decrease.

External force

If “Attenuated” is enabled this option becomes editable. It is the attractor’s strength in the outer area, defined by “External radius”.

External radius

If “Attenuated” is enabled this option becomes editable. The viewport gizmo's light blue circle indicates the radius where the decrease of the force ends.

Axial strength

This is the vortex strength along the axial direction and can only be used with"Attractor type" set to “Axial”.

Planet radius

Control the radius of the virtual planet. This option is only available with “Attractor type" set to “Planetary”. The daemon’s viewport symbol represents the adjusted radius through green circles.