Finally...the Emitter 1.0.0 API is done!!
And the source for this API is available now.
In addition to the existing LineGravity,
now a new type of gravity is available: PointGravity.
As it's name suggests,
PointGravity creates a point-like gravity source instead of a uniform one.
Don't forget to leave a thought after you've tried it :)
Any suggestions are welcome as well.