Function AnimationNode.process
User-defined callback called when a custom node is processed. The time parameter is a relative delta, unless seek is true, in which case it is absolute.
Here, call the blendInput, blendNode or blendAnimation functions. You can also use getParameter and setParameter to modify local memory.
This function should return the time left for the current animation to finish (if unsure, pass the value from the main blend being called).
void process
(
const(double) time,
const(bool) seek
) nothrow @nogc;