Daemons - Attractor

Owned by thomas (Unlicensed)
Last updated: 25 Nov, 2016
2 min read

This daemon attracts particles towards its centre – negative values create a repulsion. Near the centre attraction forces become stronger and particles/objects 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. Rigid or soft bodies with very high masses normally need strong internal forces to start moving.

Internal radius

If “Attenuated” is set to “Yes”, this option becomes editable. It is the radius where the force begins to decrease. The parameter's unit is metres.

External force

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

External radius

If “Attenuated” is set to “Yes”, this option becomes editable. The value, scaled in metres, determines the radius where the decrease of the force ends, and is represented by a dark blue ring.

Attenuated

“Yes” unlocks three fields to specify the details for the force’s decease with growing distance from the centre.

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.
Planet radius

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

Axial strength

This is the vortex strength along the axial direction and can only be used with the “Axial” attractor type.