Nope, you misunderstood. The t value is used like any other variable so
you'd get the 0.9 to 1.0 part of the spline. You are actually using any
variable number taken from elsewhere for that and when it goes out of range
of the values you use in setting up the spline it just doesn't do anything.
When the variable is within the range that's set up then it does get
applied.
For example, starting point t=0 but the clock or another variable is at -1
and increasing. When it reaches 0 it begins reacting in the spline, as long
as a t value is at 0 or above of course.

Now, this is something I'm unsure of. The interesting thing to think of here
is if cubic_spline doesn't even have a -0.25 variable to work with how does
it know to use it as a control point? I'm going to need to think this over
myself or maybe somebody in-the-know can tell us but I think the first and
last values simply remain working yet not active until the range between
those points is encountered.

I can be confusing sometimes so I sure hope I made sense.
--
Farewell,
Bob

"Dennis Miller" <dhm### [at] attbicom> wrote in message
news:3d9b916d$1@news.povray.org...
>
> could occur even if the clock went from .9 - 1; the relative time position
> of each vector would remain the same?

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