Emitter v1.0.3 new functionality: Velocity Field Overriding (VFO)
You can now assign a vector field to be the velocity field of the emitter.
All particles' velocities will equal to the vectors corresponding to their coordinates.
Note that while velocityFieldOverride is set to true,
all gravity fields are inactive.
P.S. The velocity field used in the example is a new field class: MotorField.