Commands:Compound
From SMTheming Wiki
compound is a StepMania 4-only command that allows you to combine tween types.
Usage
A comment from tween.cpp gives an example and explanation:
This interpolator combines multiple other interpolators, to allow generating more complex tweens. For example, compound,10,linear,0.25,accelerate,0.75 means 25% of the tween is linear, and the rest is accelerate. This can be used with Bezier to create spline tweens.
(Although if I remember right, compound was never fully implemented --AJ 187 17:52, 7 June 2010 (UTC))
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