GFFParams
GFFParams carries intensity, duration and arbitrary data for an effect.
Creating Params
# intensity only
var p = GFFParams.create(1.0)
# intensity + duration
var p = GFFParams.create(1.0, 0.3)
Chaining Data
var p = GFFParams.create(1.0, 0.2)\
.with_color("color", Color.RED)\
.with_float("amplitude", 0.5)\
.with_bool("loop", false)