Offset gravity

The gravity vector of the particle system.

Source

Offset get gravity {
  if (_gravity == null)
    return null;

  return new Offset(_gravity.x, _gravity.y);
}
void gravity=(Offset gravity)

Source

set gravity(Offset gravity) {
  if (gravity == null)
    _gravity = null;
  else
    _gravity = new Vector2(gravity.dx, gravity.dy);
}