Creates a field that attracts or repels objects based on their electrical charge and on their distance from the field’s center.
- iOS 8.0+
- macOS 10.10+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 3.0+
A physics field object. To use the field in a scene, attach it to the
physics property of an
Use this field type to make objects behave differently from one another when they enter a region, or to make an object's behavior different from its mass-based behavior. An electric field behaves according to the first part of the Lorentz force equation modeling real-world electromagnetic forces—the field applies a force whose magnitude is proportional to electric charge and distance.
By default, physics bodies and particle systems have no electric charge, so they are unaffected by electric and magnetic fields. Use the
charge property of a physics body or the
particle property of a particle system to add charge-based behavior.
When the field’s
strength value is positive (the default), it attracts bodies whose charge is negative and repels bodies whose charge is positive. To reverse this behavior, set the field’s
strength property to a negative value.
falloff value for an electric field is
2, indicating that the field’s effect diminishes with the square of its distance from its center.