Two kind of break-point functions are available: Temporal Break-point functions and Parameter Break-point functions. A MetriX break-point function is defined by stating a name, an interpolation type and any number of points from which the others will be computed.
A Temporal Break-point Function is a user defined function that returns a single value according to the relative time elapsed since the beginning of an event.
And unlike Temporal Break-point Functions, Parameter Break-point Functions return a complete envelope that will be applied to the parameter involved according to its definition.